HomeMy WebLinkAboutWetland Analysis, Buffer Mitigation Plan - PLN General - 1/2/2008 BUFFER MITIGATION PLAN
FOR THE
2 ACRE PARCEL
ON
EAST NORTH BAY ROAD
ALLYN
Mason County, Washington
TPN 1222050t:NM
Ida a �
Prepared For:
Bill and Lisa Root
PO Box 1959
Silverdale, WA 98383
Prepared By:
lid
Joanne Bartlett
Wiltermood Associates, Inc.
1015 SW Harper Road
Port Orchard, WA 98367
(360) 876-2403
January 2, 2008
TABLE OF CONTENTS
PAGE
INTRODUCTION 1
SITE CONDITIONS 2
SITE DEVELOPMENT PROPOSAL 3
MITIGATION PLAN OVERVIEW 3
Goals of the Buffer Mitigation Plan 4
Planting Plan 4
MONITORING PLAN 6
Performance Standards 6
MAINTENANCE PLAN 7
CONTINGENCY PLAN 8
FINANCIAL GUARANTEES 8
LIMITATIONS & BIOLOGIST SIGNATURE 9
INTRODUCTION
This mitigation plan has been prepared for the variance required for placement of a
manufactured home on property on North Bay Road (Tax Parcel No. 122205017003) in
Allyn, Mason County, Washington. Two wetlands were identified on this property and
because they and their required buffers cover most of this parcel, the buffers are being
significantly reduced to accommodate the proposed home. The home will actually replace a
travel trailer that has been on the property for some time but is not a permanent building.
The new home will be placed in the existing cleared portion of the site and the existing
driveway from North Bay Road will be utilized. The parcel is additionally impacted by
shoreline setbacks from Case Inlet. To compensate for the reduced buffer, enhancement is
proposed in a portion of the shoreline setback and in the on-site buffers of both wetlands.
The enhancement will involve removal of invasive species, which on this site includes
mostly Japanese knotweed, and installation of native trees and shrubs. A portion of the
wetland in the south half of the property was inadvertently cleared and it will be replanted
as part of the enhancement/mitigation plan. The total area of wetland buffer impacted by
the proposed 24 x 60 foot manufactured home is roughly 8,425 square feet and total area of
enhancement is 9,166 square feet so the ratio is slightly over 1:1, which is the usual ratio
required for buffer impacts.
The southern wetland is a large forested system that encompasses nearly 90% of the site
and the northern wetland is a small system that just extends onto the parcel. Both wetlands
meet the criteria for Category III systems and a 60 foot buffer is required. Because the
extent of wetlands, the only alternative available on this site is placing the home between 13
and 17 feet from the southern wetland and about 15 feet from the northern wetland at one
corner of the house. A rough 15 foot buffer is proposed around each wetland but portions
of the southern buffer could go down to 10 feet in width where the home is less than 15 feet
from the wetland boundary. The northern wetland buffer widens out to about 30 feet north
and west of the wetland. Mitigation for buffer impacts is proposed and will involve
removal of invasives and installation of native plants. Shrubs are proposed for the most
part with Nootka rose, ocean spray and Pacific ninebark proposed for two portions of the
shoreline buffer and Pacific ninebark, Nootka rose, and red osier dogwood will be planted
in the buffer of the northern wetland. The buffer of the southern wetland is mainly being
planted with a row of western red cedar along the wetland edge with red osier dogwood,
black twinberry and Pacific ninebark planted in the disturbed area of wetland encompassing
roughly 2,761 square feet at the north end of the southern wetland. Western red cedars will
be scattered throughout this area and a mix of cascara and bitter cherry trees will be
installed within the shoreline and northern wetland buffer.
Removal of invasives can occur at any time after approval of this mitigation plan and plant
installation should take place during the first winter after the home is placed on the site.
Typically, installation of plants is required as part of the building permit process and they
must be installed prior to issuance of the occupancy permit. Planting can take place during
i
the summer months if they are regularly cared for. Monitoring will be required for a
period of five years to track the progress of the installed plants and regular weed removal
will be required to ensure that the installed plants are not negatively impacted by the growth
of non-natives. Actual vegetation monitoring visits will be made in the first three years of
monitoring (Years 1-3) and in the fifth year (Year 5) skipping Year 4. Maintenance will
also include watering the installed plants on a weekly to bi-weekly basis through the
summer months. The monitoring plan has been developed so that the future homeowners
can conduct the monitoring. A performance bond will be set up to ensure that the plants
are installed as required and to ensure that monitoring and maintenance activities are
conducted over a period of five years.
SITE CONDITIONS
This parcel is situated on the shoreline of Case Inlet and is dominated by forest and shrub
vegetation communities with a gravel pad at the north end where a travel trailer was
situated. A gravel drive from North Bay Road extends east towards the trailer from near
the northwest corner. The parcel is bordered to the south and north by low density
residential homes, to the east by Case Inlet and to the west by East North Bay Road. A
mobile home is proposed on the gravel pad where the travel trailer was situated. The
topography slopes gently to moderately down from west to east toward Case Inlet.
Two areas of wetland were identified and delineated on this property. The wetland analysis
report completed for this project states that one wetland was delineated on the property
because it was thought at that time that the northern wetland was off-site. The site plan
shows it as being on the site so it is described as the second on-site wetland. The largest
area of wetland lies across the southern 3/4's of this property and lies between North Bay
Road and the shoreline of Case Inlet. This wetland, referred to as the southern wetland, is
a sloping forested and scrub/shrub system that is seasonally flooded with water and is not
affected by tidal saltwater because it is positioned above the ordinary high water line.
There is a culvert conveying water through the wetland from roadside ditches along North
Bay Road but there is no actual formal stream flow through the wetland although it does
exit through a very narrow, shallow channel across the beach. There is no apparent fish
use within this stream because of its small size and low flows. The second wetland lies
along the north edge of the property and is referred to as the northern wetland. Both
wetlands are dominated by a red alder and western red cedar forested canopy with red osier
dogwood and salmonberry dominating the shrub layer. Salmonberry dominates the shrub
communities. The herbaceous layer of both wetlands is dominated by soft rush, horsetail,
velvet grass and skunk cabbage. The wetlands meet the criteria for Category III sloping
systems that score less than 20 points for habitat functions. Sixty foot (60 foot) buffers are
required for Category III wetlands when they score less than 20 points for habitat and a
moderate intensity land use (single family homes) is proposed. A 100 foot setback is
required from the shoreline of Case Inlet.
2
SITE DEVELOPMENT PROPOSAL
Due to site constraints, there is only one building site plan that will allow construction of a
single family home on this 2 acre parcel. The site plan prepared by Greg Spencer shows
the 24 foot by 60 foot manufactured home roughly in the same location as the travel trailer
and the existing driveway will be utilized as access to the new home. The site can hook up
to the local sewer system so no on-site septic is required. The site is composed 100% of
critical areas and buffers and there is no alternative to placing the home in the buffer as
currently proposed. A minimum buffer of 10 feet is proposed but generally the buffer from
both areas of wetland varies between 15 and 30 feet (see site plan). A 25 foot shoreline
setback is proposed from Case Inlet. The area for placement of the home is currently
cleared of vegetation so no additional vegetation removal is required and no new impacts
will occur. A variance is necessary to achieve the reduced wetland buffer and shoreline
setback because there is no alternative to reducing the buffers of both areas significantly.
The proposed mitigation plan works to preserve a building site on the property while also
compensating for the reduction of buffers for the on-site Category III wetlands and the
shoreline. Enhancement of wetland, wetland buffer and reduced shoreline setback is
proposed to improve vegetation conditions and thus the ability of the buffers to protect the
wetlands from the on-site development. Specifically, two areas of shoreline setback that
roughly total 3,052 square feet will be enhanced by removing invasives (mostly Japanese
knotweed) and installation of Nootka rose, ocean spray and Pacific ninebark and scattered
cascara and bitter cherry trees. The middle portion of the setback is not being enhanced to
maintain the water view and to allow access to the beach. The northern wetland buffer will
be enhanced with red osier dogwood, Pacific ninebark and Nootka rose with a mixture of
cascara and bitter cherry trees. This area of enhancement is roughly 3,353 square feet in
size with the buffer width ranging from 15 feet in the middle to 30 feet at either end (west
and east of narrow portion). The eastern half of the 15 foot buffer proposed along the
southern wetland is in good condition vegetation wise and no enhancement is proposed in
that area. The western half of the buffer is being enhanced with a single strip of western
red cedar trees spaced roughly 20 feet apart along the disturbed wetland edge. Additional
trees are not proposed because the buffer is narrow and the trees will actually be fairly
close to the proposed home. If the plan proposed additional tree installation and even closer
to the home, the trees could be considered hazards and future homeowners may be forced
to remove them. Roughly 2,716 square feet of disturbed wetland is being restored to
improve vegetation conditions and it will include red osier dogwood, Pacific ninebark and
black twinberry with scattered western red cedar trees.
MITIGATION PLAN OVERVIEW
The mitigation plan proposes improvement of buffer conditions where feasible on this site,
which is severely constrained by critical areas and buffers. The buffers are mostly being
planted with deciduous shrub species because they provide low dense cover at most times of
3
the year and will not pose a hazard to the proposed home after invasive species have been
removed. Deciduous trees are proposed in the buffer areas and will be scattered
individually amongst the proposed shrub clumps. Conifer trees are proposed along the edge
of the southern wetland boundary and scattered amongst the shrub clumps proposed in the
disturbed area of the southern wetland. In general, about 9,166 square feet of enhancement
is proposed to compensate for roughly 8,425 square feet of buffer impact. The impact area
includes the area where the home is proposed and areas retained around the home for yard
area but excludes the driveway because it is in place and will not require additional creation
of impervious surface over and above what is currently present. A 15 foot buffer is
proposed along the entire southern wetland boundary and a buffer of 15 to 30 feet is
proposed along the on-site portion of the northern wetland. The southern wetland buffer
will decrease to 10 feet nearest the house. Monitoring is required for a period of 5 years to
' document the progress of the plants, which are being installed to improve the vegetation
cover and protection of the wetlands, and will take place once a year in Years 1, 2, 3 and 5.
Goals of the Buffer Mitigation Plan
The main goal of this mitigation plan is to compensate for the loss of buffer that results
from the significant buffer reduction that is necessary to facilitate construction of a home on
this property. Buffer impacts roughly total 8,425 square feet and the four mitigation areas
total roughly 9,166 square feet, which is slightly greater than the 1:1 ratio required for
buffer impacts. The goal of plant installation in the wetland is to establish a trend toward
the development of a forested-scrub/shrub community so that the buffers are functioning
better than the buffer at the required width. Generally, installation of native vegetation will
provide good screening of the wetlands that supplements the existing vegetation and/or
replaces the poor vegetation cover in many areas. The success of the restoration goals will
be judged using the following performance standards: The area should have at least 50%
cover by the native installed and volunteer plants that are at least 5 feet tall by the end of
the 5 year monitoring period; there will be 90% survival of the installed plants over the
entire five year monitoring period; and less than 15% cover by non-native (Himalayan
blackberry, Japanese knotweed, reed canary grass, English ivy and Scot's broom) during
the entire five year monitoring period. The mitigation areas will be monitored for a period
of five years following implementation of the plan to ensure goals and performance
standards are met.
Planting Plan
The planting plan proposes installation of the 208 plants listed below with the shrubs
installed mostly in linear clumps of 6. Western red cedar trees are proposed between the
shrub clumps in the disturbed portion of the southern wetland and cascara/bitter cherry will
be installed in the buffer and shoreline setback areas. Plant installation shall take place
after removal of the invasives (mostly Japanese knotweed). The table below list the plants
selected for installation in the enhanced wetland and buffer areas with the number of plants
to be installed, common and botanical names, size and spacing. Plant size and location of
the plants are shown on the attached AutoCAD drawing generated for this project.
4
Number Common Name Botanical Name Spacing Size
36 Red osier dogwood Cornus stolonifera 8-10' on 1 gallon
center
12 Black twinberry Lonicera involucrata 8-10' on 1 gallon
center
45 Pacific ninebark Physocarpus capitatus 8-10' on 1 gallon
center
36 Nootka rose Rosa nutkana 8-10' on 1 gallon
center
24 Ocean spray Holodiscus discolor 8-10' on 1 gallon
center
25 Western red cedar Thuja plicata As shown on 2 gallon
design
30 Cascara Frangula purshiana As shown on 2 gallon
Bitter cherry Prunus emarginata design
Each of the plants on the lists above were selected because they do well in these types of
mitigation areas, are native to this area of Mason County and many were observed in un-
impacted areas adjacent to the site. Three of the shrub species (red osier dogwood, black
twinberry and Pacific ninebark) were selected because they can also be installed as 36 to 48
inch long cuttings that will take root once the growing season begins but installation of
cuttings will take place only in the wetland. Otherwise, the plants will be installed as 1 or 2
gallon size potted/bareroot plants (as specified on the mitigation plan) and each plant should
be at least 24 inches tall. Installation should take place after the start of the dormant season
(October 15`' to March 15`'') while the plants are not actively growing and so that they are
in place by the start of the growing season but they can be installed prior to the end
(October 15`'') or after the start (March 15`'') of the growing season if they are regularly
watered and cared for.
In general, the plants will be laid out randomly by hand in their respective clumps as
indicated on the planting plan and not measured out by string line. A two to three foot
diameter hole should be dug prior to removal of the plant from the pot and the plug should
be placed immediately into the ground once the soil around the plug is loosened. The hole
will then be backfilled with the dug out soil and loosely packed down around the plug. The
project biologist will be on-site to supervise prior to and during plant installation to ensure
that the plants are placed in the appropriate areas. Each of the plants will be flagged with
brightly colored survey ribbon so they can be seen easily during review of the plant
installation and during future monitoring/maintenance activities. An as built report shall be
prepared once the plants have been installed to inform Mason County that the mitigation
plan has been implemented. It will mention whether or not plants were substituted for
5
something else (if a specified plant is not available) and will include photos taken
immediately after plant installation. The as built report should be submitted to Mason
County DCD within 1 month of plant installation.
MONITORING PLAN
The monitoring plan has been prepared so that it can be conducted by the current owner or
by a biologist. Monitoring will occur for a period of five years following installation of the
plants to track the success of the project and to ensure that the performance standards are
met. Monitoring should take place at the end of each summer (August or September, which
is considered the end of the growing season) so that the plants have had a chance to grow
fully. Each planted area will represent a single monitoring unit so that all plants in each
area will be used to determine whether the performance standards are being met. The
performance standards and the methods used to analyze the conditions are listed below.
Performance Standards
During each year of the five year monitoring period, the enhanced wetland and buffer areas
shall meet the following performance standards:
• Minimum of 90% survival of planted species.
• Less than 15% cover by non-native exotics, including but not limited to Japanese
knotweed, reed canary grass, blackberry species and Scot's broom.
By the end of the five year monitoring period, the enhanced wetland and buffer areas shall
meet the following performance standards:
• Minimum of 90% survival of planted species.
• Minimum of 510% cover within is enhanced areas by native vegetation 4 feet or
taller, including native volunteers not installed, such as red alder, salmonberry or
trailing blackberry.
• Less than 15% cover by non-native exotics, including Japanese knotweed, reed
canary grass, blackberry species and Scot's broom.
Performance Standard #1-Survival Rate-Survival rate will be determined in each
monitoring unit by counting the number of live individuals of the different species
and dividing by the number of that species originally installed, which will give a
percent survival rate.
Performance Standard #2-Percent Cover-The percent cover standard will be
monitored as if looking over each enhanced area from above and estimating the areas
covered by the individual species.
Performance Standard #3-Cover by Non-Natives-The cover by non-native plants,
which typically include tall grass, Scot's broom, and blackberry, should be kept
below 15%, which is why regular maintenance is required. The cover by these
6
species will be determined through the same process as determining the cover of
installed plants. If the percent cover by non-native is too high, more intensive
removal must be implemented.
Monitoring will also include taking photos from various locations in the enhanced wetland
and buffer areas to visually document the information collected during performance
standard monitoring and how the mitigation is progressing. The photos will be taken from
the same point and in the same direction during each monitoring year so that a progression
of photos of each particular area is available for comparison. The approximate location and
direction of the photos should be marked on the as built planting plan and in the field so
they can be easily identified during each of the monitoring visits. The photos and
performance standard data will be compiled into a short report and submitted to the
Environmental Planner of Mason County Department of Community Development (DCD)
to ensure compliance with the proposed plan and its performance standards. Submittal and
approval of the as built report/letter will initiate the start of the five year monitoring period.
The as built will include the planting plan showing the location of the installed plants,
whether any plant substitutions were made due to lack of plant availability, and the
monitoring and/or photo stations established for the five year monitoring program.
MAINTENANCE PLAN
Maintenance of the enhanced wetland and buffer areas shall include removal of non-native
invasives to meet the less than 15% cover performance standard and watering of the
installed vegetation to meet the 90% survival rate and ensure the plants grow and develop.
Removal of non-native plants shall take place at least twice during each growing season:
once in the spring (May-June) and once in the summer (July-August). Removal of non-
natives should be conducted by hand but a weed eater can be used where feasible but care
must be taken to avoid injury to the installed plants.
Watering of the planted vegetation will be necessary between June and September of each
year to ensure the plants survival to meet the 90% survival rate minimum and ensure that
they plants develop to meet the 50% cover criteria by the end of the five year monitoring
program_ Watering should be conducted at least one time per week during the summer
when the weather is very warm and dry but is probably not needed as frequently if the
summer is cool and wet. Sprinklers set up in the various areas would be the best way to
water the plants with each area watered a minimum of twice a week for roughly 1/2 to 1/4 of
an hour each. Typically, watering is absolutely necessary for at least the first two years
after plant installation but could be necessary thereafter if the plants have not become
acclimated and die off has been observed during the previous end of growing season
monitoring visit.
CONTINGENCY PLAN
Although the success of the wetland and buffer enhancement plan is not ensured, it is likely
to succeed because of the size and scope of the project. If for some reason any of the plant
species installed within the planted areas do not survive, they will be replaced with the same
native species. The survival rate will be determined during the yearly monitoring visits and
replacement of dead or dying plants will occur during the next dormant season.
Maintenance activities will be continued for those replaced plants to ensure their survival.
If the percent cover or survival rate standards are not met by the end of year five, additional
plant installation may be required and the monitoring and maintenance period may be
extended for another one to two years.
PERFORMANCE BONDS
A performance bond is required for enhancement projects to ensure that they are carried out
as approved by providing funds that can be used by Mason County to facilitate
implementation and/or monitoring should the project proponent be unable to implement the
approved plan. The following amounts are based on the current plant costs for plant and
installation labor, hourly rate for plant installation supervision, monitoring by a qualified
biologist over the five-year period and the cost estimate to water and weed the site. Two
performance bonds can be set aside one for implementation (Performance Bond #1) and one
for monitoring/maintenance (Performance Bond #2) phases of the project if acceptable to
Mason County Department of Community Development. The performance bond for
implementation will be released after submittal and approval (by Mason County) of the as
built report and the monitoring/maintenance bond will be released following submittal and
approval of the final, Year Five monitoring report. The totals for each performance bond
are based on the figures for the services associated with projects of this type and the totals
will then be multiplied by an amount (usually 125% to 150%) to be determined by Mason
County Department of Community Development. If Mason County requires one bond for
both phases, then the figures provided below should be added together for an overall total.
PERFORMANCE BOND #1-IMPLEMENTATION
153 1 gallon and 55 2 gallon bareroot and/or containerized plants,
labor & tax included (Based on native plant nursery price
list as per planting specs) $1,774.00
Cost for supervision by project biologist 440.00
As-Built design and letter 880.00
Total cost for Implementation $3,094.00
PERFORMANCE BOND #2-MONITORING AND MAINTENANCE
Five year monitoring ($550.00/year in Years 1, 2, 3 and 5) $2,200.00
Five year maintenance 2,000.00
Total cost for Monitoring and Maintenance $4,200.00
8
LIMITATIONS
This report has been prepared for Bill and Lisa Root. Given the constraints of schedules and
scope of work, Wiltermood Associates, Inc. warrants that the work performed is in
accordance with the Mason County Critical Areas Ordinance and the technical guidelines and
criteria in effect at the time this report was prepared. The results and recommendations of
this report represent professional opinion based upon the information provided by the client,
the client's consultants, and that gathered through the preparation of this wetland mitigation
plan. It is important to note that the Mason County Department of Community Development
will make the final determination of whether the mitigation plan meets the intent of the
Critical Areas Ordinance. No other.warranty, expressed or implied, is made.
Signed
Joanne Bartlett
Professional Wetland Scientist
9
WETLAND ANALYSIS REPORT
FOR A 2 ACRE PROPERTY
on
EAST NORTH BAY ROAD,
ALLYN
Mason County, Washington
Tax Parcel Number:
1222050 1-7010
Prepared For:
Bill and Lisa Root
PO Box 1959
Silverdale, WA 98383
Prepared By:
Wiltermood Associates, Inc.
1015 SW Harper Road
Port Orchard, WA 98367
(360) 876-2403
October 11, 2007
TABLE OF CONTENTS
PAGE
INTRODUCTION 1
BACKGROUND INFORMATION 2
Mason County Soil Survey 2
National Wetlands Inventory 2
Priority Species 2
WETLAND ASSESSMENT 2
Wetland Data Description 3
Upland Data Description 3
Wetland Classification 4
Wetland Category and Stream Typing 4
Required Buffers 5
Off-Site Wetland Descirption 5
WETLAND FUNCTIONS ASSESSMENT 5
Functional Value Rating Rationale 6
Habitat Assessment 6
PROJECT DESCRIPTION AND POTENTIAL IMPACTS 7
SUMMARY 7
LIMITATIONS 9
REFERENCES
Table of Contents, continued
APPENDICES
Appendix A-Maps
A-1 Vicinity Map
A-2a Site Plan
A-2b Wetland Rough Drawing
A-3 Mason County Soil Survey
A-4 National Wetlands Inventory Map
A-5 Site Pictures
Appendix B-Description of Mapped Soils (from Mason County Soil Survey)
Appendix C-Delineation Methodology
Appendix D-Definition of Indicator Status
Appendix E-1 Wetland Rating Form- DOE Revised 2004 Wetland Rating
System for Western Washington
E-2 Excerpt from Mason County Critical Areas Ordinance
Concerning Wetland Delineation Requirements and Buffer
Requirements
Appendix F-Wetland Functions Description
Appendix G-Wetland and Upland Data Forms
INTRODUCTION
_ The delineated wetland discussed in this report is situated on a two acre parcel located east
of East North Bay Road (Tax Parcel No. 122205017003) in Allyn, Mason County,
Washington (Appendix A-1). The parcel is positioned in the NE 1/4 of the NE 1/4 of Sec
20, T 22 N, R 1 W. WM. It is situated on the shoreline of Case Inlet and is dominated by
forest and shrub vegetation communities with an area in the north half containing a gravel
pad where a travel trailer is now situated. A gravel drive from North Bay Road extends
east towards the trailer from near the northwest corner. The parcel is bordered to the
south and north by low density residential homes, to the east by Case Inlet and to the west
by East North Bay Road. A mobile home is proposed on the gravel pad where the travel
trailer is now situated. Due to the constraints of the wetland and buffers a variance will be
needed to accommodate a home site on this lot.
The topography gently to moderately slopes down from west to east toward Case Inlet.
One wetland was identified and delineated on the property and a perennial non fish bearing
stream flows east through the center of the property. The wetland lies to the north and
south of the gravel pad and encompasses most of the property. It meets the criteria for a
sloping forested and scrub/shrub Category III system. According to the Mason County
Critical Areas Ordinance, Category III wetlands that score less than 20 habitat functions
points require a 60 foot buffer when a moderate intensity land use is proposed. The stream
appears to be a non fish bearing perennial flowing stream that meets the criteria for a Type
Np system and requires a 100 foot buffer. A 100 foot setback is also required from the
shorelines of Case Inlet. A 15 foot building setback is required from the edge of the
wetland, stream and shoreline buffer. In situations where critical areas overlap the buffer
that offers the greatest protection will be the regulated buffer. In this situation the wetland
and shoreline buffer will be the regulated buffers.
The delineation was completed on August 7, 2007 using the Department of Ecology
Washington State Wetlands Identification and Delineation Manual in accordance with the
Mason County Critical Areas Ordinance. The Department of Ecology Wetland Manual
requires the use of the three wetland parameter methodology (wetland hydrology,
hydrophytic vegetation, and hydric soils) when making determinations (see Appendix C for
criteria used to make wetland determinations). All three parameters must be present for an
area under normal circumstances to be considered wetland. Because this site is determined
to be under normal circumstances, the Routine On-Site Method was used to make the on-
site wetland boundary determination. This report discusses the on-site wetland with
respect to data collected in the field used in conjunction with information obtained from the
Mason County Soil Survey and National Wetlands Inventory. The report includes wetland
categorization, classification, wetland functions assessment and discussion of the potential
impacts of future development on the delineated wetland.
t
BACKGROUND INFORMATION
Mason County Soil Survey
The onsite soils are mapped as Mc-McKenna gravelly loam, 0-3% slopes according to the
Soil Conservation Service (now the National Resources Conservation Service), Soil Survey
of Mason County Area, Washington, September, 1960. McKenna gravelly loam soils are
classified as hydric. See Appendix A-3 for site located on the soil survey and Appendix B
for description of the on-site soils.
National Wetlands Inventory
The US Fish and Wildlife Service (USFWS), National Wetlands Inventory (NWI), Belfair
Quadrangle, maps an Estuarine Intertidal Aquatic Bed/Unconsolidated Shoreline wetland
along the Case Inlet shoreline. The onsite forested and scrub/shrub palustrine wetland is
not mapped on the National Wetlands Inventory. Wetlands on the NWI were often based
on information obtained using aerial photographs and forested wetlands are sometimes
indistinguishable from forested uplands when seen from the air which may explain why the
onsite wetland area is not mapped. See Appendix A-4 for site located on the NWI map.
Priority Species
There are no Washington State Priority 1, 2, or 3 plant or animal species known to exist on
the parcel (Washington Natural Heritage Program, 1993/95 Update) nor were any
identified during our field survey. This data search was conducted using the printed
edition of the Natural Heritage Program and a data base search has not been completed.
WETLAND ASSESSMENT
This section describes the delineated wetland with respect to the three parameters as
collected in the field and recorded on the data forms. The delineation revealed that the
wetland and associated buffer covers the entire site. The wetland extends offsite to the
south and north. The wetland edges are marked with 11 orange flags labeled WB A-1 to
A-11. The delineation begins on the south side of the gravel drive near North Bay Road
and extends east toward Case Inlet. The delineation then continues near Case Inlet on the
north side of the gravel drive and heads west. Data was collected at two test holes during
the field visit. Test Hole 1 is situated in the wetland and Test Hole 2 is located near the
gravel pad. See Appendix A-2 for location of the wetland boundary flags and test holes
and Appendix G for Data Forms 1 and 2.
The following section describes the data collected at test holes in the wetland and adjacent
upland and used to make the wetland boundary determination (See Appendix C for
methods and criteria for additional information). The wetland and upland data is described
in separate sections and each section includes a description of the dominant plant species,
the soil profile and whether hydric conditions are present, and the presence/absence of
2
wetland hydrology and/or wetland hydrology indicators. The dominant plant species
identified by common and botanical name along with the indicator status (OBL, FACW,
FAC, etc. See Appendix D for Definition of Indicator Status) as listed on the back of each
data form. The presence of hydric soil conditions is examined in a 16 inch soil hole
conducted at each test site. The hydric soil criteria is met when there is a low soil matrix
chroma at 10 inches or just below the A horizons. The chromas are determined using
damp soil samples that are compared to a corresponding color chip in the Munsell Soil
Color Charts. The chromas were then recorded on the data sheet using Hue (YR) and
Value/Chroma. Any Hue and Value with a low Chroma is typical of hydric (wetland) soils
that have developed over time due to inundation or saturation by water. The presence or
absence of wetland hydrology and/or wetland hydrology indicators includes the source of
hydrology and direction of flow (if evident). Wetland Classification, Wetland Category
and Required Buffers follow the description of the wetland and upland data.
Wetland Data Description
The wetland is dominated by forest and scrub/shrub vegetation communities. Test Hole 1
documents conditions in the scrub/shrub community. It is dominated by salmonberry
(Rubus spectabilis) FAC and cascara buckthorn (Frangula purshiana) FAC- with a thick
herbaceous layer of soft rush (Juncus effusus) FACW+; horsetail (Equisetum arvense)
FAC; velvet grass (Holcus lanatus) FAC and skunkcabbage (Lysichiton americanum) OBL.
Also at the site are scattered bitter cherry (Prunus emarginata) FACU trees and trailing
blackberry (Rubus ursinus) FACU. The forested portions of the wetland are dominated by
red alder (Alnus rubra) FAC and western red cedar (Thuja plicata) FAC with moderately
thick shrub layers of salmonberry (R. spectabilis) FAC and redosier dogwood (Cornus
sericea) FACW. The soil hole at Test Hole 1 revealed a single layer of silt loam having a
matrix chroma of 10 YR 2/1. Wetland hydrology was present at the time of the site visit
as soil saturation with water at six inches in the soil hole. The wetland receives water
from seeps and springs as well as runoff from residential areas which flows into a road side
ditch that drains to a culvert under North Bay Road and into the wetland. The wetland
drains to the stream that flows easterly into Case Inlet. The area sampled at this test hole
is wetland because positive indicators are present for all three parameters. The soil hole
revealed a hydric profile, wetland hydrology was present and the area is dominated by
hydrophytic vegetation.
Upland Data Description
Data was collected near the gravel pad at Test Hole 2. The area is dominated by a tree
layer of bitter cherry (P. emarginata) FACU with a lower percentage of red alder (A.
rubra) FAC. The understory is dominated by mowed grasses and horsetail (E. arvense)
FAC with lower percentages of salmonberry (R. spectabilis) FAC. The soil hole revealed
a three layer profile consisting of a gravelly sandy loam surface layer (0-6") having a
matrix chroma of 10 YR 3/2, a middle gravelly sand layer (6-14") that has a matrix
chroma of 10 YR 4/6 and a bottom layer (14-16") having a matrix chroma of 10 YR 4/3.
3
There was no hydrology at the time of the site visit and there is no evidence of wetland
hydrology. The area sampled at this test hole is upland because positive indicators are not
present for any of the three parameters. The soil hole revealed a non hydric profile, there
was no evidence of wetland hydrology and the area is dominated by non hydrophytic
vegetation.
Wetland Classification
This wetland has been classified according to the U.S. Fish and Wildlife Service,
Classification of Wetlands and Deepwater Habitats of the United States, Cowardin et al.
December, 1979. This system describes a wetland's association with a body of water
(Estuarine, Palustrine, Riverine, etc.), while the class refers to the dominant vegetation
community (aquatic bed, emergent, forest). Hydrologic regime indicates the wetland's
' relationship to the movement of water. Wetland A is a freshwater forested and
scrub/shrub system that is saturated so it is classified as Palustrine, Forested, Scrub/Shrub
Saturated which is abbreviated as PFOSSB.
Wetland Category and Stream Typing
The Mason County Critical Areas Ordinance requires that identified and delineated
wetlands be categorized using the revised 2004 Washington State Wetlands Rating System
for Western Washington (Publication # 04-06-025). This system utilizes hydrogeomorphic
characteristics to determine the potential and opportunity for a particular wetland to
perform water quality, hydrologic and habitat functions. It differentiates wetlands into
four categories ranging from Category I systems that typically have high potential and
opportunity to perform these functions to Category IV systems that have low potential and
opportunity to perform the functions. A rating form that asks a series of questions is used
to identify the wetland's position in the landscape (sloping, depressional, Riverine, etc.)
and its specific characteristics that would indicate it has potential to perform the water
quality, hydrologic and habitat functions. When the wetland has opportunity to perform
the functions, it receives a multiplier of 2. The scores are then added up and a category is
assigned based on the number of points received as follows: Category I wetlands score 70
points or greater, Category II systems score between 51-69 points, Category III systems
score 30-50 points and Category IV wetlands score less than 30 points.
Wetland A meets the criteria for a sloping Category III system that scores a total of 34
points on the rating form (10 points for water quality functions, 6 points for hydrologic
functions and 18 points for habitat functions). The wetland has potential for water quality
functions since it is dominated by vegetation that slows water flow and allows herbaceous
vegetation to filter pollutants. It has opportunity for water quality functions because it
receives water from a ditch that appears to collect water from residential areas and drains
through a culvert and directly into the wetland. The wetland has potential for hydrologic
functions because it is dominated by vegetation that slows water flow but it has no
opportunity because it flows directly into Case Inlet and there are no downstream areas that
4
could be damaged from flooding. The wetland scores 18 points for habitat functions
because there are two vegetation communities (scrub/shrub and forested) with special
habitat features such as standing snags and large woody debris. The wetland also serves as
a vegetated corridor to Case Inlet. See Appendix E-1 for wetland rating form.
The stream appears to meet the criteria for a Type Np stream because it appears to be non
fish bearing and permanently flowing. The stream is not mapped by the Department of
Natural Resources website or the Department of fish and wildlife's Salmonscape website.
The stream does not appear to extend offsite.
Required Buffers
According to the Mason County Critical Areas Ordinance Category III wetlands that score
' less than 20 habitat functions points require a 60 foot buffer when a moderate intensity land
use project is proposed. The buffers are measured horizontally from the delineated
boundary. The stream requires a 100 foot buffer measured from the ordinary high
watermark. A 100 foot setback is required from the shoreline. A 15 foot building setback
is required from the edge of the wetland, stream and shoreline buffer. In situations where
critical areas overlap the buffer that offers the greatest protection will be the regulated
buffer. In this situation the wetland and shoreline buffer will be the regulated buffer.
Buffer reductions for moderate intensity land use projects are only permitted through the
buffer averaging process which allows a 25% reduction. Buffer reductions beyond that
permitted in the Mason County Critical Areas Ordinance, must proceed through the formal
variance process. This project will proceed through the formal variance process because it
requires wetland buffer reductions beyond that permitted by the Mason County Critical
Areas Ordinance. See Appendix E-2 for buffer requirements and criteria for buffer
reductions and averaging.
Off-Site Wetland Description
The wetland extends offsite to the north and south and will not have buffers extend onsite.
No other wetlands were identified within 300 feet of the parcel.
WETLAND FUNCTIONS ASSESSMENT
Flood control, groundwater recharge/discharge, water quality maintenance, biological
support, and many other functions are performed by wetlands. The following table lists
the most common functions of wetlands and rates the delineated wetland according to its
specific value for that function. In general, determining the rating and rationale of the
wetland was conducted using professional experience and the revised 2004 Washington
State Wetlands Rating System for Western Washington (Publication # 04-06-025). See
Appendix F for further description of wetland values and functions.
5
Value or Rating and Rationale
Function
Storm and LOW
Flood Water This wetland rates LOW for storm and flood water storage because it
Storage is situated on sloping terrain and has a direct outlet into Case Inlet
which reduces residence time of water within the system and thus the
potential for storm and flood water storage.
MODERATE
[W�_aterQuality
otection The wetland has potential for water quality protection because the
vegetation dominating the wetland slows water flow allowing
erbaceous plants to filter pollutants. It has opportunity for this
function because it receives water runoff from residential homes
within 150 feet upslope which is a direct pollution source.
Groundwater LOW
Recharge This wetland does not appear to facilitate groundwater recharge
ecause it has a direct outlet, which reduces the residence time of
water and thus the potential for groundwater recharge. It is situated
on a slope and fed by seeps ands rings.
Groundwater HIGH
Discharge The wetland rates HIGH for groundwater discharge because most of
the hydrology is provided by seeps and springs, which were identified
during the time of the field visit.
Biological MODERATE
Support The wetland rates MODERATE for Biological support because it is a
vegetated corridor that connects to Case Inlet. The wetland is also
composed of two vegetation communities and has special habitat
features such as snags and downed woody debris. It does not rate
higher because it is isolated on three sides by homes and roads.
Aesthetic, LOW
Educational This system rates LOW for Aesthetic, Educational, and Recreational
land values because there is a lack of public access and the wetland's size
Recreational does not provide-for recreational activities such as hiking or fishing.
Values There is some opportunity for passive recreational activities such as
bird watching and there is some aesthetic value to the system, since it
provides a vegetated sight and sound buffer between neighboring
houses and roads.
Habitat Assessment
Heavily used roads and residential areas separate this wetland from other wetlands in the
vicinity but it is part of a corridor to Case Inlet. There is the potential for usage by large
wildlife species such as deer and coyote although no indicators (scraped and scratched
6
trees, tracks and scat) were observed at the time of the site visit. The rest of the wildlife
potentially using the site and the immediate vicinity include birds such as eagles, ospreys
and herons as well as other small mammals that thrive in these types of systems. The
wetland is dominated by a forest of red alder and western red cedar ranging from 10 to 30
years of age with semi-diverse shrub and herbaceous layers as well as a scrub/shrub
vegetation community dominated by willows, salmonberry and redosier dogwood.
Although this area serves as a vegetated habitat area that connects to Case Inlet it does not
appear to have significant habitat features associated with it.
PROJECT DESCRIPTION AND POTENTIAL IMPACTS
A mobile home is proposed in the upland area on this site which is composed entirely of
' Category III wetland and its critical area buffers. Due to the extent of the wetland and
critical area buffers there is no room for buffer averaging on the parcel and the project will
have to proceed through the formal variance process. The 60 foot wetland buffer will be
reduced to accommodate the home so it is about 13 feet at its closest point. The 100 foot
shoreline setback will be reduced to 25 feet with a 15 foot building setback from the
setback edge. Currently positioning the mobile home on the existing gravel pad would be
difficult so the project will need to create a new access that will be further north than its
current location. The proposed access will be located in buffer and not in wetland.
Impacts to the system will be limited by placing the mobile home on the existing gravel
pad. Little to no vegetation clearing will be needed and the mobile home will be placed in
an area where a travel trailer is now situated. There will be no additional impervious
surface created since the area currently consists of gravel.
The mobile home will probably not have a negative affect on water quality functions as
most of the proposed impervious surfaces will be comprised of the home and roof top
water is considered clean. The project should not significantly affect hydrologic functions
or water discharge because the mobile home will be placed in an area already composed of
impervious surface. The wetland will not be significantly impacted from the mobile home
because there will be little to no vegetation clearing and new areas of impervious surfaces
will not be created. The ability of the wetland to support wildlife may be affected from
increased noise and lights coming from the mobile home. Densely planting the remaining
portion of buffer with native vegetation will reduce indirect impacts to the wetland as well
as improving the current buffer functions. A habitat management plan may be required by
Mason County since the mobile home is proposed about 40 feet from Case Inlet.
SUMMARY
The delineated wetland discussed in this report is situated on a two acre parcel located east
of East North Bay Road in Allyn, Mason County, Washington. The parcel is situated on
the shoreline of Case Inlet and dominated by forest and shrub vegetation communities with
7
an existing gravel pad in the north half where a travel trailer is now situated. A gravel
drive from North Bay Road extends east towards the trailer from near the northwest
corner. The topography gently to moderately slopes down from west to east into Case
Inlet. The parcel is bordered to the south and north by low density residential
development, to the east by Case Inlet and to the west by East North Bay Road.
One wetland was identified and delineated on the property and a perennial non fish bearing
stream flows east thru the center. The wetland lies to the north and south of the gravel pad
and encompasses most of the property. It meets the criteria for a sloping forested and
scrub/shrub Category III system. According to the Mason County Critical Areas
Ordinance, Category III wetlands that score less than 20 habitat functions points require 60
foot buffers when moderate intensity land use projects are proposed. The stream appears
to be a non fish bearing and perennial flowing. It meets the criteria for a Type Np stream
and requires a 100 foot buffer. A 100 foot setback is required from the shorelines of Case
Inlet. A 15 foot building setback is required from the edge of the wetland, stream and
shoreline buffer. In situations where critical areas overlap the buffer that offers the
greatest protection will be the regulated buffer. In this situation the wetland buffer will be
the regulated buffer.
A mobile home is proposed on an existing gravel pad in the only upland of the parcel.
Due to the constraints of the critical areas and their associated buffers a variance will be
required to facilitate the home site. The 60 foot wetland buffer and the 100 foot shoreline
buffer will each need to be reduced to accommodate the mobile home. There will be few
impacts to the wetland since the mobile home will be placed in an area where a travel
trailer is now situated and because existing impervious surfaces will be utilized, hydrologic
functions will not be impacted and there will be little to no vegetation clearing. Densely
planting the remaining buffer with native vegetation will limit indirect impacts and increase
the current buffer functions.
8
LIMITATIONS
This report has been prepared for Lisa and William Root. It is important to acknowledge
that definition of plant community boundaries is not an exact science. Different agencies
and individuals may often disagree on exact boundaries and/or plant community
classifications. It is the responsibility of the various resource agencies that regulate
development activities in wetlands to make the final determination of wetland boundaries.
Therefore, the information presented in this report should be reviewed by the appropriate
regulatory agencies prior to detailed site planning and/or construction activities.
Given the constraints of schedules and scope of work, Wiltermood Associates, Inc.
warrants that the work performed is in accordance with the technical guidelines and criteria
in effect at the time this report was prepared. The results and recommendations of this
report represent professional opinion based upon the information provided by the client,
the client's consultants, and that gathered through the course of this wetland study. No
other warranty, expressed or implied, is made.
Signed
Aennifadisman eetland
n Everitt
Wetland Technician Specialist
9
REFERENCES
Cooke Scientific Services, Inc. Wetland and Buffer Functions Semi-Quantitative
Assessment Methodology. Final Working Draft, User's Manual.
February 2000.
Cowardin, L., F. Golet, V. Carter. and E. LaRoe. Classification of Wetlands and
Deepwater Habitat of the United States. U.S. Fish and Wildlife Service,
FWS/OBS 79/31. 1979. 103 pp.
Environmental Laboratory. Corps of Engineers Wetlands Delineation Manual.
January 1987. 100 pp. plus appendices
Guard, B. Jennifer. Wetland Plants of Oregon and Washington. Lone Pine
Publishing. 1995. 239 pp.
Hitchcock, Leo C. and Cronquist, Arthur. Flora of the Pacific Northwest.
University of Washington Press. 1973. 730 pp.
Lyons, C.P. Trees Shrubs, and Flowers To Know in Washington. J.M. Dent and
Sons Limited. 1977. 211 pp.
Mason County Ordinance No. 138-06. Interim Resource Ordinance. Adopted
December 27, 2006, Revised December 27, 2006. 79 pp.
Munsell Color. Munsell Soil Color Charts. Macbeth, a Division of Kollmorgen
Corporation. 1975. Baltimore, MD.
Pojar, Jim and MacKinnon, Andy. Plants of the Pacific Northwest Coast,
Washington, Oregon, British Columbia, & Alaska. Lone Pine Publishing.
1994. 527 pp.
Speare-Cooke, Sarah. A Field Guide to the Common Wetland Plants of Western
Washington and Northwestern Oregon. Seattle Audubon Society. 1997.
417 pp.
U.S. Army Corps of Engineers. Wetland Plants of the Pacific Northwest.
September, 1984. 85 pp.
U.S. Department of Agriculture, Soil Conservation Service. Soil Survey-Mason
County, Washington. September 1960. 76 pp. plus map sheets.
References, continued
US Environmental Protection Agency. Wetlands Evaluation Technique (WET):
Volume I: Literature Review and Evaluation Rationale. October 1991
U.S. Fish and Wildlife Service. National List of Plant Species That Occur In
Wetlands: 1988 National Summary. September, 1988. 244 pp.
U.S. Fish and Wildlife Service. National List of Plant Species that Occur in
Wetlands, Northwest Supplement (Region 9). 1993.
U.S. Fish and Wildlife Service. National Wetlands Inventory. 1978.
Washington State Department of Ecology. A Guide to Conducting Wetlands
Inventories. Publication Number 89-60. December 1989.
Washington State Department of Ecology. Washington State Wetlands Rating
System, Second Edition, Publication No. 93-74. August, 1993. 61 pp.
Washington State Department of Ecology. Washington State Wetland
Identification and Delineation Manual, Publication No. 96-94. March
1997. 88 pp. plus appendices.
Washington State Department of Natural Resources. State of Washington Natural
Heritage Plan. 1993/1995 Update.
i
SITE
I SITE
SI
.� SITE
co
v
w
� �Case "�
w b �Inlet�
Ie de St
APPENDIX A- 1 _ - Wiltermood
` = Associates, Inc.
VICINITY P 10 SW Harper Rd.
Portrt Orchard, WA 98366
(360) 876-2403
AyWrz. OYS-,EPu a MASor) �pY li�Eg
w
�✓ �i p ��
w = - ;-'A LE 1 =9
T1DEL At jjC)5
-5Ez � TES'
i'
- _ THIS 15 war A SL�PVCV_ 4Fr- (tl Li►, S (_`t, J,It`tJS
St 00 A0 AS CM:4 TED RY OW1� Z, I PG;(2 k�GN IS)
w W-C- W Rt CWW:P-S, 40 AVAll1 R-E LANb 92COCYS.
-�K AUL tOETl1 P-JCS T41E�R k SPEG�� s ►t +ES i 5
f w �t� �2E 1=at'�rzO�C�Mt�II�NS �D OtJ t�k�1.1N4�Jl��� S��-
e" N
-3iEL -X PT -r,
5. EYCE IVC :JnXATC-GO21269 (`h�i fl � 1� '.V t-VL vis mfzcc-L .
- AZ&
/� �,� ,� / �.-1 A►� SJrH.I Wb Clf-A21N6 T WV VWIC-122 T4OJJ Ma
e L raG ROAM'/ tJOZ tutu' (ajSVUC:P W AC"V 11'7 `'
sE+�34ct ',rjS 1, UA.
ANY Kita SwUD U*wEf.(L- ?-unuxn ALL-u---cE3YAEY
UN.
A? x
N. SvbrZE ROAD Wiltermood
Associates, Inc.
1015 S Rt Harper Raab
P.t O.&..A WA 9&367-9306
0 0)87624o jim(360)876-2053
1_ �
APPENDIX B
MASON COUNTY SOIL SURVEY
DESCRIPTION OF SOIL TYPES
The soils described in this appendix are excerpts, considered applicable to urban
development, taken from the Soil Conservation Service, Soil Survey of Mason County
Area, Washington, September, 1960. For further information, see page 34 of the soil
survey. Information listed below for McKenna soils was collected between 1951 and
1960 and uses for the individual soils have probably changed since that time.
McKenna Series
The McKenna series consists of poorly drained, very dark, gravelly soils in depressions
and along natural drainage ways. They have developed in Vashon glacial drift, under
rainfall that ranges from 45 to 60 inches a year. The vegetation consists of deciduous
trees and shrubs, sedges, reeds, spirea, and wild rose with occasional thickets of
quaking aspen and Oregon oak. McKenna soils occur mainly in association with the
Alder-wood and Everett soils and only rarely with the Grove or Shelton soils. McKenna
soils differ from the Norma and Bellingham soils in having very gravelly subsoils and
substrat. They are much darker colored than the Koch soils. The Deckerville soils,
which closely resemble the McKenna, have developed from more basic parent material.
Mc-McKenna gravelly loam 0-3% slopes. This soil is poorly drained and classified as
hydric. The surface soil is friable and granular, dark grey gravelly loam that is high in
organic material. Below this to depths of 10 to 15 inches is firm dark grayish very
gravelly loam or gravelly clay loam that has a weak subangular blocky structure and is
moderately high in organic matter. The substratum begins at depths of 24 to 30 inches
and consists of slightly to moderately compact coarse gravel and sand that is faintly
mottled and stained. In many areas there is a thin highly organic silty layer on the
surface. The soil is medium acid to strongly acid in all layers. Gravel prevents
cultivation. The soil is wet most of the year but dries rapidly in summer. Nearly all
this soil is in natural cover. A few areas have been cleared for pasture and grazing.
The narrow areas of this soil and of other McKenna soils provide green pastures after
those on surrounding upland soils have dried.
APPENDIX C: WETLAND DETERMINATION/DELINEATION METHODOLOGY
The definition for wetland established by the U.S. Army Corps of Engineers (COE) was used to
determine the presence and extent of wetlands on this parcel. Section 404 of the Clean Water Act
(1972) states that wetlands are:
"Those areas that are inundated or saturated by surface or groundwater
at a frequency and duration sufficient to support, a prevalence of vegetation
typically adapted for life in saturated soil conditions. Wetlands generally include
swamps, marshes, bogs, and similar areas."
This criteria is based on the Department of Ecology Washington State Wetland Identification and and
Delineation Manual, the 1987 Corps of Engineers (COE) Wetland Delineation Manual and the 1989
Federal Interagency Committee for Wetland Delineation(FICWD). This committee included
representatives from the COE, U.S. Fish and Wildlife Service, Environmental Protection Agency, and
Soil Conservation Service, to establish technical procedures and guidelines for wetland determination
and delineation. These guidelines as set forth in both delineation manuals requires that three technical
criterion: (1) hydrophytic vegetation, (2) hydric soils, and (3) wetland hydrology must all be met for
an area to be identified as wetland. A general summary of these criterion or parameters as defined
within the COE and FICWD manuals include:
Hydrophytic Vegetation Criterion: This criterion is
met when, under normal circumstances 50 percent or more
of the composition of the dominant species from
all strata are obligate wetland (OBL), facultative
wetland (FACW), and/or facultative (FAC).
Hydric Soil Criterion: This criterion is met for any
area having soils that are saturated, flooded, or
ponded long enough during the growing season to
develop anaerobic conditions in the upper part (USDA
Soil Conservation Service, 1987)_
Wetland Hydrology Criterion: This criterion is met for
any area having permanent or periodic inundation, or
soil saturation to the surface, at least seasonally.
These three criterion are the basis for all field work and wetland delineation performed on this parcel.
The specific methodology used is outlined in the next section.
WETLAND DELINEATION METHODOLOGY
The wetland delineation followed the Routine On-site and Intermediate Determination Methods as
outlined in each manual_ A summary of this method includes-.
Plant Community Assessment. The entire project site was initially walked to identify the
plant community types present_ This provided a rough picture of the type and extent of
wetland(s) which exist on site- Also observed and noted were topographical features,
1
hydrologic flow patterns, and any significantly disturbed areas. It was then determined
whether normal environmental conditions were present, or human modifications had oceurrL.-
to the wetland.
Selection of Sample Area(s). A series of sample areas or points were selected and flagged >
.best characterize the plant communities of suspected wetland and non-wetland areas. The
approximate location of these flagged sample points were noted on a map of the project site
subsequent survey.
Characterization of Plant Communities. At each sample point the dominant plant species
within the tree, shrub, and herb stratum were identified and noted on a data form. Species
were identified and noted according to Flora of the Pacific Northwest (Hitchcock & Cronquist,
1973). The estimated percent areal cover and the indicator status (as listed in.the National I_ �t
of Plant Species that Occur in Wetlands: 1988, Washington) were also noted on the data foi_i.
It was then determined whether the hydrophytic vegetation criteria was met. When 50% or
more of the dominant species have an indicator status of OBL, FACW, or FAC, the vegetati i
is considered hydrophytic.
Characterization of Soils. At each sample point, a hole 16 to 18 inches in depth was dug
using a spade (an existing soil perk hole was used if available). Soil characteristics (matrix
color, mottles, etc.) were examined and noted. It was then determined whether the hydric sue;l
.
criterion was met. Hydric soil criterion is outlined on page 6 of the FICWD manual and pal
26 to 34 of the COE manual.
Determination of Hydrology Criterion. At each sample point the presence of inundation
by water, soil saturation by water, or other hydrologic field indicators was noted. It was then
determined whether the wetland hydrology criterion was met.
Wetland Determination. The completed data forms were then examined for each selected
sample point within the plant communities. Each plant community meeting the hydrophytic
vegetation, hydric soil, and wetland hydrology criteria was considered wetland. Data forms
are numbered correspondingly to the sample points located on the final survey drawing.
DETERMINATION OF WETLAND-NONWETLAND BOUNDARY
After completing the determination method summarized above, the actual boundary between wetland
and.non-wetland was delineated. This delineation was completed by:
1. recognizing obvious wetland and non-wetland areas,
2. identification of transitional areas between the two areas,
3, final determination of the boundary by further sampling of vegetation, soils, and hydrology.
The wetland Boundary was then flagged with numbered orange flags with WB (Wetland Boundary)
written on them. The approximate location of these flags was then noted on a map, if available, for
subsequent survey.
* Important Note: The exact location of the boundary between wetland and non-wetland areas may b
difficult to determine, especially if transition areas are more gradual. In cases such as this the wetlan
boundary is determined, after further sampling, by using the best possible professional judgment.
APPENDIX D
DEFINITION OF PLANT INDICATOR STATUS
The following plant indicator status categories and their symbols are derived
from the Wetland Plant List, Northwest Region, USFWS, Washington, D.C.
(Reed, 1988)
Symbol Definition of Plant Indicator Status
OBL Obligate wetland plants are nearly always found in
wetlands (estimated probability 99% or more)
FACW Facultative wetland plants usually found in wetlands
(estimated probability 67-99%)
FAC Facultative plants are equally likely in wetlands and
uplands (estimated probability 34-66%)
FACU Facultative upland plants usually in uplands
(estimated probability 67-99%)
UPL Upland plants are nearly always in uplands (estimated
probability 99% or more)
NI Not indicated plant species are not determined due to
lack of sufficient information
NL Not listed in the "National List of Plant Species that
Occur in Wetlands" indicating the lack of information
for this species.
Note: The "National List of Plant species that Occur in Wetlands" uses a plus
(+) or minus (-) sign to specify a higher or lower portion of a particular wetland
indicator frequency for the three facultative-type indicators...). (from section
2.5, page 6, Federal Manual for Identifying and Delineating Jurisdictional
Wetlands)
'C ef AA1y 1
Wetland name or number A
WETLAND RATING FORM—WESTERN WASHINGTON
Version 2-Updated June 2006 to increase accuracy and reproducibility among users
Name of wetland (if known): wlt (�� Date of site visit: 8-9-0r7
Rated by--_ .I,�Sc, �n,1.">,ikrr�^r^»1 A►55C?G. Trained by Ecology? Yes4No_ Date of trainingAU"
SEC:�.Q TWNSHP:'2.Z4 RNGE: I W Is S/T/R in Appendix D? Yes X No
Phi pu#d
Map of wetland unit: Figure _A Z Estimated size ----_—
SUMMARY OF RATING
Category based on FUNCTIONS provided by wetland
I II III IV
Score for Water Quality Functions
Category I = Score>=70 V
Category II = Score 51-69 Score for Hydrologic Functions
62
Category III= Score 30-50 Score for Habitat Functions
CateRory IV= Score < 30 TOTAL score for Functions
Category based on SPECIAL CHARACTERISTICS of wetland
I II Does not Apply-4-
Final Category (choose the •-mgnr.3. %..L' go.s i A-...
Summary of basic information about the wetland unit
Wetland Unit has Special Wetland HGM Class
Characteristics used for Rating
Estuarine De ressional
Natural Heritage Wetland Riverine
Bog Lake-fringe
Mature Forest lope
Old Growth Forest Flats
Coastal Lagoon Freshwater Tidal
Interdunal
None of the above Check if unit has m e
HGM classes rese
iltermood
Wetland Rating Form-western Washington 1 ' 0t `SQciates, Inc*
version 2
1015 Harps 1mi
pot orb WA 9&W--9309
060 A*240 Jim 060 87&JW
Wetland name or number
Does the wetland unit being rated meet any of the criteria below?
If you answer YES to any of the questions below you will need to protect the wetland
according to the regulations regarding the special characteristics found in the wetland.
Check List for Wetlands That May Need Additional Protection YES NO
in addition to the protection recommended for its category)
SP 1.Has the wetland unit been documented as a habitat for any Federally listed
Threatened or Endangered animal or plant species (TIE species)? v
For the purposes of this rating system, "documented" means the wetland is on the n
appropriate state or federal database.
SP2.Has the wetland unit been documented as habitat for any State listed
Threatened or Endangered animal species?
For the purposes of this rating system, "documented" means the wetland is on the
appropriate state database. Note: Wetlands with State listed plant species are
categorized as Category I Natural Heritage Wetlands see p. 19 of data form).
SP3. Does the wetland unit contain individuals of Priority species listed by the
WDFWfor the state?
SP4. Does the wetland unit have a local significance in addition to its functions?
For example,the wetland has been identified in the Shoreline Master
Program,the Critical Areas Ordinance,or in a local management plan as
having special significance.
To complete the next part of the data sheet you will need to determine the
Hydro, e� omorphic Class of the wetland being rated.
The hydrogeomorphic classification groups wetlands into those that function in similar ways. This
simplifies the questions needed to answer how well the wetland functions. The Hydrogeomorphic
Class of a wetland can be determined using the key below. See p. 24 for more detailed instructions
on classifying wetlands.
... Wetland Rating Form—westeth Washington 2 August 2004
" ' t version 2'
Wetland name or number
Classification of Wetland Units in Western Washington
If the hydrologic criteria listed in each question do not apply to the entire unit being
rated,you probably have a unit with multiple HGM classes. In this case,identify which
hydrologic criteria in questions 1-7 apply, and go to Question 8.
1.Are the water levels in the entire unit usually controlled by tides (i.e. except during floods)?
NO—�yyesjs
YES —the wetland class is Tidal Fringe
the salinity of the water during periods of annual low flow below 0.5 ppt (parts per
thousand)? YES—Freshwater Tidal Fringe NO—Saltwater Tidal Fringe (Estuarine)
If your wetland can be classified as a Freshwater Tidal Fringe use the forms for Riverine
wetlands. If it is Saltwater Tidal Fringe it is rated as an Estuarine wetland. Wetlands that
were called estuarine in the first and second editions of the rating system are called Salt
Water Tidal Fringe in the Hydrogeomorphic Classification. Estuarine wetlands were
categorized separately in the earlier editions, and this separation is being kept in this
revision. To maintain consistency between editions,the term"Estuarine" wetland is kept.
Please note, however,that the characteristics that define Category I and II estuarine
wetlands have changed(see p. ).
2.The entire wetland unit is flat and precipitation is the only source (>90%) of water to it.
and surface water runoff are NOT sources of water to the unit.
1�14O— go W 3 YES—The wetland class is Flats
If your wetland can be classified as a"Flats" wetland,use the form for Depressional
wetlands.
3. Does the entire wetland unit meet both of the following criteria?
The vegetated part of the wetland is on the shores of a body of permanent open water
(without any vegetation on the surface) at least 20 acres (8 ha) in size;
_At least 30%of the open water area is deeper than 6.6 ft (2 m)?
'_�
—go to YES—The wetland class is Lake-fringe (Lacustrine Fringe)
4. Does the entire wetland unit meet all of the following criteria?
The wetland is on a slope (slope can be very gradual),
_The water flows through the wetland in one direction(unidirectional)and usually
comes from seeps. It may flow subsurface, as sheetflow,or in a swale without
distinct banks.
The water leaves the wetland without being impounded?
NOTE: Surface water does not pond in these type of wetlands except occasionally in
very small and shallow depressions or behind hummocks (depressions are usually
<3ft diameter and less than 1 Loot dee ).
NO - go to 5 —The wetland class is Slope
Wetland Rating Form—western Washington 3 August 2004
version 2
Wetland name or number
5. Does the entire wetland unit meet all of the following criteria?
The unit is in a valley, or stream channel, where it gets inundated by overbank
flooding from that stream or river
The overbank flooding occurs at least once every two years.
NOTE: The riverine unit can contain depressions that are filled with water when the river is
not o ing.
=OtYES—The wetland class is Riverine
6. Is the entire wetland unit in a topographic depression in which water ponds,or is saturated to the
surface, at some time during the year. This means that any outlet, if present, is higher than the
o nd.
N — YES—The wetland class is'Depressional
7. Is the entire wetland unit located in a very flat area with no obvious depression and no overbank
flooding. The unit does not pond surface water more than a few inches. The unit seems to be
maintained by high groundwater in the area. The wetland may be ditched,but has no obvious
O—go to 8 YES—The wetland class is Depressional
8.Your wetland unit seems to be difficult to classify and probably contains several different HGM
clases. For example, seeps at the base of a slope may grade into a riverine floodplain,or a small
stream within a depressional wetland has a zone of flooding along its sides. GO BACK AND
IDENTIFY WHICH OF THE HYDROLOGIC REGIMES DESCRIBED IN QUESTIONS 1-7
APPLY TO DIFFERENT AREAS IN THE UNIT(make a rough sketch to help you decide). Use
the following table to identify the appropriate class to use for the rating system if you have several
HGM classes present within your wetland. NOTE: Use this table only if the class that is
recommended in the second column represents 10%or more of the total area of the wetland unit
being rated. If the area of the class listed in column 2 is less than 10%of the unit;classify the
wetland using the class that represents more than 90%of the total area.
HGM Classes within the wetland unit being_rated HGM Class to Use in Rating
Slope+ Riverine Riverine
Slope+Depressional Depressional
S +Lake-frin Lake-fringe
Depressional+Riverine along stream within boundary Depressional
Depressional +Lake-fringe Depressional
Salt Water Tidal Fringe and any other class of freshwater Treat as ESTUARINE under
wetland wetlands with special
characteristics
If you are unable still to determine which of the above criteria apply to your wetland,or if you
have more than 2 HGM classes within a wetland boundary,classify the wetland as Depressional
for the rating.
Wetland Rating Form—western Washington 4 August 2004
version 2
Wetland name or number
S Slope Wetlands Points
WATER QUALITY FUNCTIONS - Indicators that the wetland unit functions to (only 1 score
per box)
im rave wiiter uali
S S 1. Does the wetland unit have the potential to improve water quality? (see p.64)
S S 1.1 Characteristics of average slope of unit:
Slope isl%or less (a 1%slope has a ]foot vertical drop in elevation for every 100 ft
horizontal distance) points=3
Slope is 1%-2% points
Slope is 2%-5% points= 1
Slope is greater than 5% points=0
S S 1.2 The soil 2 inches below the surface(or duff layer)is clay or organic (use NRCS
definitions) O
YES=3 points — oints
S S 1.3 Characteristics of the vegetation in the wetland t a t se ments and pollutants: Figure
Choose the points appropriate for the description that best fits the vegetation in the
wetland. Dense vegetation means you have trouble seeing the soil surface(>75%
cover), and uncut means not grazed or mowed and plants are higher than 6 inches.
Dense,uncut,herbaceous vegetation>90%of the wetland area points=6
Dense,uncut,herbaceous vegetation> 1/2 of area points
Dense,woody,vegetation>'/z of area points=2
Dense,uncut,herbaceous vegetation> 1/4 of area points= 1
Does not meet any of the criteria above for vegetation points=0
Aerial photo or map with vegetation polygons _
S Total for S 1 Add the points in the boxes above 1 5 1
S S 2. Does the wetland unit have the opportunity to improve water quality? (see p.67)
Answer YES if you know or believe there are pollutants in groundwater or surface water
coming into the wetland that would otherwise reduce water quality in streams,lakes or
groundwater downgradient from the wetland. Note which of the following conditions
provide the sources of pollutants. A unit may have pollutants coming from several
sources, but any single source would qualify as opportunity.
— Grazing in the wetland or within 150ft
— Untreated stormwater discharges to wetland
Tilled fields, logging, or orchards within 150 feet of wetland
multiplier
Residential,urban areas, or golf courses are within 150 ft upslope of wetland
— Other 2--
YES multiplier is 2 NO multiplier is 1
S TOTAL- Water Quality Functions Multiply the score from S 1 by S2 1
Add score to table on . l
Comments
Wetland Rating Form-western Washington 1 1 August 2004
version 2
Wetland name or number
S Slope Wetlands Points
HYDROLOGIC FUNCTIONS - Indicators that the wetland unit functions to (only t score
per box)
reduce flooding and stream erosion
S 3. Does the wetland unit have the potential to reduce flooding and stream (see p.68)
erosion?
S S 3.1 Characteristics of vegetation that reduce the velocity of surface flows during storms.
Choose the points appropriate for the description that best fit conditions in the wetland.
(stems of plants should be thick enough (usually > 118in), or dense enough, to remain
erect during surface flows)
Dense,uncut,rigid vegetation covers >90%of the area of the wetland. points A6
Dense,uncut,rigid vegetation> 1/2 area of wetland points=3
Dense,uncut,rigid vegetation> 1/4 area points= 1
More than 1/4 of area is grazed,mowed,tilled or vegetation is `
not rigid points=0 (�
S S 3.2 Characteristics of slope wetland that holds back small amounts of flood flows:
The slope wetland has small surface depressions that can retain water over at least
10%of its area. YES points=2
NO points 0 _
S Add the points in the boxes above 1
S S 4. Does the wetland have the opportunity to reduce flooding and erosion? see p. 70)
Is the wetland in a landscape position where the reduction in water velocity it provides
helps protect downstream property and aquatic resources from flooding or excessive
and/or erosive flows? Note which of the following conditions apply.
Wetland has surface runoff that drains to a river or stream that has flooding
problems
multiplier
— Other
(Answer NO if the major source of water is controlled by a reservoir(e.g. wetland is a seep
that is on the downstream side of a dam)
YES multiplier is 2 NO multiplier is 1
S TOTAL - Hydrologic Functions Multiply the score from S 3 by S 4
Add score to table on p. 1
Comments
Wetland Rating Form—western Washington 12 August 2004
version 2
Wetland name or number P\
These questions apply to wetlands of all HGM classes. Points
(only 1 score
HABITAT FUNCTIONS - Indicators that unit functions to provide important habitat per box)
H 1.Does the wetland unit have the potential to provide habitat for many species?
H 1.1 Vegetation structure(seep. 72) Figure
Check the types of vegetation classes present(as defined by Cowardin)-Size threshold for each
class is V4 acre or more than 10%of the area if unit is smaller than 2.5 acres.
Aquatic bed
Emergent plants
K Scrub/shrub(areas where shrubs have>30%cover)
X Forested(areas where trees have>30%cover)
If the unit has a forested class check if:
)C The forested class has 3 out of 5 strata(canopy, sub-canopy, shrubs,herbaceous,
moss/ground-cover)that each cover 20%within the forested polygon
Add the number of vegetation structures that qualify. If you have:
4 structures or more points=4
Map of Cowardin vegetation classes 3 structures points
oints= 1
2 structures p
1 structure points=0
H 1.2.Hydroperiods (see p. 73) Figure___
Check the types of water regimes(hydroperiods)present within the wetland. The water
regime has to cover more than 10%of the wetland or'/. acre to count. (see text for
descriptions of hydroperiods)
Permanently flooded or inundated 4 or more types present points=3
Seasonally flooded or inundated 3 types present points=2
Occasionally flooded or inundated 2 types present point
_Saturated only 1 type present points=0
X _Permanently flowing stream or river in,or adjacent to,the wetland
Seasonally flowing stream in,or adjacent to,the wetland
Lake fringe wetland =2 points l
Freshwater tidal wetland=2 points Map of hydroperiods
H 1.3. Richness of Plant Species (seep. 75)
Count the number of plant species in the wetland that cover at least 10 ft2. (different patches
of the same species can be combined to meet the size threshold)
You do not have to name the species.
Do not include Eurasian Milfoil, reed canarygrass,purple loosestrife, Canadian Thistle
If you counted: > 19 species points=�2
List species below if you want to: 5 - 19 species points__Q
<5 species points=0
Total for page
Wetland Rating Form-western Washington 13 August 2004
version 2
Wetland name or number A
H 1.4.Interspersion of habitats(Seep. 76) Figure
Decide from the diagrams below whether interspersion between Cowardin vegetation
classes(described in H 1.1),or the classes and unvegetated areas(can include open water or
mudflats) is high,medium,low,or none.
0 re P
None=0 points Low= 1 point Moderate=2 points
[riparian braided channels)
High =3 points
NOTE: if you have four or more classes or three vegetation classes and open water
the rating is always"high". Use map of Cowardin vegetation classes
H 1.5. Special Habitat Features: (seep. 77)
Check the habitat features that are present in the wetland. The number of checks is the
number ofpoints you put into the next column.
Large,downed,woody debris within the wetland(>4in.diameter and 6 ft long).
Standing snags(diameter at the bottom>4 inches) in the wetland
Undercut banks are present for at least 6.6 ft(2m)and/or overhanging vegetation extends at
least 3.3 ft(1 m)over a stream(or ditch)in,or contiguous with the unit,for at least 33 ft
(1 Om)
Stable steep banks of fine material that might be used by beaver or muskrat for denning
(>30degree slope)OR signs of recent beaver activity are present(cut shrubs or trees that
have not yet turned gre5Arown)
At least'/a acre of thin-stemmed persistent vegetation or woody branches are present in areas
that are permanently or seasonally inundated(structures for egg-laying by amphibians)
Invasive plants cover less than 25%of the wetland area in each stratum of plants
NOTE: The 20%stated in early printings of the manual on page 78 is an error.
H 1. TOTAL Score - potential for providing habitat r7 1
Add the scores from H1.1, H1.2, H1.3, H1.4, H1.5 _ (_
Comments
Wetland Rating Form—western Washington 14 August 2004
version 2
Wetland name or number
H 2. Does the wetland unit have the opportunity to provide habitat for many species?
H 2.1 Buffers (seep. 80) Figure
Choose the description that best represents condition of buffer of wetland unit. The highest scoring
criterion that applies to the wetland is to be used in the rating. See text for definition of
"undisturbed."
— 100 m(330ft)of relatively undisturbed vegetated areas,rocky areas,or open water >95%
of circumference. No structures are within the undisturbed part of buffer. (relatively
undisturbed also means no-grazing, no landscaping,no daily human use) Points=5
— 100 m(330 ft) of relatively undisturbed vegetated areas, rocky areas, or open water >
50% circumference. Points=4
— 50 m(170ft)of relatively undisturbed vegetated areas,rocky areas,or open water>95%
circumference. Points=4
— 100 m(330ft)of relatively undisturbed vegetated areas,rocky areas,or open water>25%
circumference, . Points=U
— 50 m(170ft)of relatively undisturbed vegetated areas, rocky areas,or open water for>
50%circumference. Points=3
If buffer does not meet any of the criteria above
— No paved areas(except paved trails)or buildings within 25 m(80ft)of wetland>95%
circumference. Light to moderate grazing, or lawns are OK. Points=2
— No paved areas or buildings within 50m of wetland for>50%circumference.
Light to moderate grazing,or lawns are OK. Points=2
— Heavy grazing in buffer. Points= 1
— Vegetated buffers are<2m wide(6.6ft)for more than 95%of the circumference(e.g.tilled
fields,paving,basalt bedrock extend to edge of wetland Points=0.
— Buffer does not meet any of the criteria above. Points= 1
Aerial photo showing buffers
H 2.2 Corridors and Connections(seep. 81)
H 2.2.1 Is the wetland part of a relatively undisturbed and unbroken vegetated corridor
(either riparian or upland)that is at least 150 ft wide,has at least_30%cover of shrubs,forest
or native undisturbed prairie,that connects to estuaries,other wetlands or undisturbed
uplands that are at least 250 acres in size? (dams in riparian corridors,heavily used gravel
roads,paved roads, are considered breaks in the corridor).
YES =4 points (go to H 2.3) NO=go to H 2.2.2
H 2.2.2 Is the wetland part of a relatively undisturbed and unbroken vegetated corridor
(either riparian or upland)that is at least 50ft wide,has at least 30%cover of shrubs or
forest,and connects to estuaries,other wetlands or undisturbed uplands that are at least 25
acres in size? OR a Lake-fringe wetland, if it does not have an undisturbed corridor as in
the question above?
YES=2 points (go to H 2.3) NO=H 2.2.3
H 2.2.3 Is the wetland:
within 5 mi (8km)of a brackish or salt water estuary OR
within 3 mi of a large field or pasture(>40 acres)OR
within 1 mi of a lake greater than 20 acres?
YES = 1 point NO=0 points
Total for page
Wctland Rating Form-western Washington 15 August 2004
version 2
Wetland name or number
H 2.3 Near or adjacent to other priority habitats listed by WDFW(seep. 82)
Which of the following priority habitats are within 330ft(100m) of the wetland unit?NOTE.: the
connections do not have to be relatively undisturbed.
These are DFW definitions. Check with your local DFW biologist if there are any questions.
Riparian: The area adjacent to aquatic systems with flowing water that contains elements of
both aquatic and terrestrial ecosystems which mutually influence each other.
Aspen Stands: Pure or mixed stands of aspen greater than 0.8 ha(2 acres).
Cliffs: Greater than 7.6 m(25 ft)high and occurring below 5000 ft.
Old-growth forests: (Old-growth west of Cascade crest) Stands of at least 2 tree species,
forming a multi-layered canopy with occasional small openings;with at least 20 trees/ha(8
trees/acre)>81 cm(32 in)dbh or>200 years of age.
Mature forests: Stands with average diameters exceeding 53 cm(21 in)dbh;crown cover
may be less that 100%; crown cover may be less that 100%;decay,decadence,numbers of
snags,and quantity of large downed material is generally less than that found in old-
growth; 80-200 years old west of the Cascade crest.
Prairies: Relatively undisturbed areas(as indicated by dominance of native plants)where
grasses and/or forbs form the natural climax plant community.
Talus: Homogenous areas of rock rubble ranging in average size 0.15 -2.0 m(0.5 -6.5 ft),
composed of basalt,andesite,and/or sedimentary rock,including riprap slides and mine
tailings. May be associated with cliffs.
Caves: A naturally occurring cavity,recess,void,or system of interconnected passages
Oregon white Oak: Woodlands Stands of pure oak or oak/conifer associations where
canopy coverage of the oak component of the stand is 25%.
Urban Natural Open Space:A priority species resides within or is adjacent to the open
space and uses it for breeding and/or regular feeding;and/or the open space functions as a
corridor connecting other priority habitats,especially those that would otherwise be
isolated; and/or the open space is an isolated remnant of natural habitat larger than 4 ha(10
acres)and is surrounded by urban development-
Estuary/Estuary-like: Deepwater tidal habitats and adjacent tidal wetlands,usually semi-
enclosed by land but with open,partly obstructed or sporadic access to the open ocean,and
in which ocean water is at least occasionally diluted by freshwater runoff from the land.
The salinity may be periodically increased above that of the open ocean by evaporation.
Along some low-energy coastlines there is appreciable dilution of sea water.Estuarine
habitat extends upstream and landward to where ocean-derived salts measure less than
0.5ppt. during the period of average annual low flow.Includes both estuaries and lagoons.
--k- Marine/Estuarine Shorelines: Shorelines include the intertidal-and subtidal zones of
beaches, and may also include the backshore and adjacent components of the terrestrial
landscape(e.g.,cliffs,snags,mature trees,dunes,meadows)that are important to shoreline
associated fish and wildlife and that contribute to shoreline function(e.g.,sand/rock/log
recruitment,nutrient contribution,erosion control).
If wetland has 3 or more priority habitats=4 points
If wetland has 2 priority habitats=3 points
If wetland has 1 priority habitat= 1 point No habitats=0 points
Note:All vegetated wetlands are by definition a priority habitat but are not included in this
list. Nearby wetlands are addressed in question H 2.4
Wetland Rating Form—western Washington 16 August 2004
version 2
Wetland name or number
H 2.4 Wetland Landscape (choose the one description of the landscape around the wetland that
best fits) (seep. 84)
There are at least 3 other wetlands within '/2 mile, and the connections between them are
relatively undisturbed(light grazing between wetlands OK, as is lake shore with some
boating,but connections should NOT be bisected by paved roads, fill, fields, or other
development. points=5
The wetland is Lake-fringe on a lake with little disturbance and there are 3 other lake-fringe
wetlands within '/2 mile points=5
There are at least 3 other wetlands within '/2 mile,BUT the connections between them are
disturbed points=�
The wetland is Lake-fringe on a lake with disturbance and there are 3 other lake-fringe
wetland within '/2 mile points=3
There is at least 1 wetland within '/z mile. points=2
There are no wetlands within '/2 mile. points=0
H 2. TOTAL Score - opportunity for providing habitat ; \
Add the scores rom H2.1,H2.2, H2.3, H2.4
TOTAL for H 1 from page 14
Total Score for Habitat Functions —add the points for H 1, H 2 and record the result on
P.
l
Wetland Rating Form—western Washington 17 August 2004
version 2
Wetland name or number
CATEGORIZATION BASED ON SPECIAL CHARACTERISTICS
Please determine if the wetland meets the attributes descrihed below and circle the
appropriate answers and Category.
Wetland Type Category
Check off any criteria that apply to the wetland. Circle the Category when the
appropriate criteria are met.
SC 1.0 Estuarine wetlands (seep. 86)
Does the wetland unit meet the following criteria for Estuarine wetlands?
— The dominant water regime is tidal,
— Vegetated,and
— With a salinity greater than 0.5 ppt.
YES= Go to SC 1.1 NO
SC 1.1 Is the wetland unit within a National Wildlife Refuge,National Park,
National Estuary Reserve,Natural Area Preserve, State Park or Educational, Cat. I
Environmental,or Scientific Reserve designated under WAC 332-30-151?
YES=Category I NO go to SC 1.2
SC 1.2 Is the wetland unit at least 1 acre in size and meets at least two of the
following three conditions? YES=Category I NO=Category II Cat. I
—The wetland is relatively undisturbed (has no diking, ditching, filling, Cat. II
cultivation,grazing, and has less than 10%cover of non-native plant
species. If the non-native Spartina spp. are the only species that cover
more than 10%of the wetland, then the wetland should be given a dual Dual
rating(I/II). The area of Spartina would be rated a Category II while the rating
relatively undisturbed upper marsh with native species would be a UII
Category I. Do not, however, exclude the area of Spartina in
determining the size threshold of 1 acre.
—At least%of the landward edge of the wetland has a 100 ft buffer of
_ shrub,forest or un-grazed or un-mowed grassland.
—The wetland has at least 2 of the following features: tidal channels,
depressions with open water, or contiguous freshwater wetlands.
Wetland Rating Form—wcstem Washington 18 August 2004
version 2
Wetland name or number
SC 2.0 Natural Heritage Wetlands (seep. 87)
Natural Heritage wetlands have been identified by the Washington Natural Heritage Cat. I
Program/DNR as either high quality undisturbed wetlands or wetlands that support
state Threatened, Endangered, or Sensitive plant species.
SC 2.1 Is the wetland unit being rated in a Section/Township/Range that contains a
Natural Heritage wetland? (this question is used to screen out most sites
before you need to contact WNHP/DNR)
S/T/R information from Appendix D_ or accessed from WNHP/DNR web site
YES —contact WNHP/DNR (see p. 79) and go to SC 3.2 NO
SC 2.2 Has DNR identified the wetland as a high quality undisturbed wetland or as
or as a site with state threatened or endangered plant specie ?
YES =Category I NO
SC 3.0 Bogs (seep. 87)
Does the wetland unit(or any part of the unit) meet both the criteria for soils and
vegetation in bogs? Use the key below to identify if the wetland is a bog. If you
answer yes you will still need to rate the wetland based on its functions.
1. Does the unit have organic soil horizons (i.e. layers of organic soil), either
peats or mucks, that compose 16 inches or more of the first 32 inches of the
soil profile? (See Appendix B for a field key to identify organic soils)? Yes-
go to Q. 3 No - go to Q. 2
2. Does the unit have organic soils, either peats or mucks that are less than 16
inches deep over bedrock, or an impermeable hardpan such as clay or
volcanic ash, or that are floating on a lake or pond?
Yes - go to Q. 3 No - Is not a bog for purpose of rating
3. Does the unit have more than 70% cover of mosses at ground level, AND
other plants, if present, consist of the "bog" species listed in Table 3 as a
significant component of the vegetation (more than 30%of the total shrub
and herbaceous cover consists of species in Table 3)?
Yes—Is a bog for purpose of rating No- go to Q. 4
NOTE: If you are uncertain about the extent of mosses in the understory
you may substitute that criterion by measuring the pH of the water that
seeps into a hole dug at least 16" deep. If the pH is less than 5.0 and the
"bog"plant species in Table 3 are present,the wetland is a bog.
1. Is the unit forested (> 30%cover)with sitka spruce, subalpine fir, western
red cedar, western hemlock, lodgepole pine, quaking aspen,Englemann's
spruce, or western white pine, WITH any of the species (or combination of
species) on the bog species plant list in Table 3 as a significant component
of the ground cover (> 30%coverage of the total shrublherbaceous cover)?
2. YES = Category I No Is not a bog for purpose of rating Cat. I
Wetland Rating Form—western Washington 19 August 2004
version 2
Wetland name or number A_
SC 4.0 Forested Wetlands (seep. 90)
Does the wetland unit have at least 1 acre of forest that meet one of these criteria for
the Department of Fish and Wildlife's forests as priority habitats? If you answer yes
you will still need to rate the wetland based on its functions.
— Old-growth forests: (west of Cascade crest) Stands of at least two tree species,
forming a multi-layered canopy with occasional small openings; with at least 8
trees/acre (20 trees/hectare)that are at least 200 years of age OR have a
diameter at breast height(dbh) of 32 inches (81 cm)or more.
NOTE: The criterion for dbh is based on measurements for upland forests.
Two-hundred year old trees in wetlands will often have a smaller dbh
because their growth rates are often slower. The DFW criterion is and"OR"
so old-growth forests do not necessarily have to have trees of this diameter.
— Mature forests: (west of the Cascade Crest) Stands where the largest trees are
80—200 years old OR have average diameters (dbh)exceeding 21 inches
(53cm);crown cover may be less that 100%; decay, decadence,numbers of
snags,and quantity of large downed material is generally less than that found
in old-growth.
Cat. I
YES= Category I NO
SC 5.0 Wetlands in Coastal Lagoons (seep. 91)
Does the wetland meet all of the following criteria of a wetland in a coastal lagoon?
— The wetland lies in a depression adjacent to marine waters that is wholly
or partially separated from marine waters by sandbanks, gravel banks,
shingle, or,less frequently,rocks
— The lagoon in which the wetland is located contains surface water that is
saline or brackish(>0.5 ppt) during most of the year in at least a portion
of the lagoon (needs to be measured near the bottom)
YES=Go to SC 5.1 NO-?(not a wetland in a coastal lagoon
SC 5.1 Does-the wetland meets all of the following three conditions?
—The wetland is relatively undisturbed(has no diking, ditching, filling,
cultivation, grazing),and has less than 20%cover of invasive plant
species(see list of invasive species on p. 74).
— At least 3/4 of the landward edge of the wetland has a 100 ft buffer of
shrub, forest,or un-grazed or un-mowed grassland. Cat. I
— The wetland is larger than 1/10 acre (4350 square feet)
YES =Category I NO = Category II Cat. II
Wetland Rating Form-western Washington 20 August 2004
version 2
Wetland name or number
SC 6.0 Interdunal Wetlands (seep. 93)
Is the wetland unit west of the 1889 line (also called the Western Boundary of Upland
Ownership or WBUO)?
YES - go to SC 6.1 NO�not an interdunal wetland for rating
If you answer yes you will still need to rate the wetland based on its
functions.
In practical terms that means the following geographic areas:
• Long Beach Peninsula- lands west of SR 103
• Grayland-Westport- lands west of SR 105
• Ocean Shores-Copalis- lands west of SR 115 and SR 109
SC 6.1 Is the wetland one acre or larger, or is it in a mosaic of wetlands that is
once acre or larger?
YES = Category II NO—go to SC 6.2 Cat. II
SC 6.2 Is the unit between 0.1 and 1 acre, or is it in a mosaic of wetlands that is
between 0.1 and 1 acre?
YES = Category III Cat. III
Category of we- land based on Special Characteristics
Choose the "highest"rating if wetland falls into several categories, and record on
P
If you answered NO for all types enter"Not Applicable"on p._1 _
Wetland Rating Form—western Washington 21 August 2004
version 2
A
Z'
7.01.070 WETLANDS
The purpose of this section is to avoid,or in appropriate circumstances, minimize, rectify, reduce or compensate
for impacts arising from land development and other activities affecting wetlands;to maintain and enhance the
biological and physical functions and values of wetlands with respect to water quality maintenance; stormwater
and floodwater storage and conveyance;fish and wildlife habitat; primary productivity, recreation, education and
historic and cultural preservation. When avoiding impacts is not reasonable, mitigation shall be implemented to
achieve a no net loss of wetlands in terms of acreage,function and value.
A. CLASSIFICATION
The following shall be classified as wetland areas:
Areas that are inundated or saturated by surface or ground water at a frequency and duration sufficient to
support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for
life in saturated soil conditions. Wetlands generally include swamps, marshes, bogs and similar areas.
However, wetlands may include those artificial wetlands intentionally created from non-wetland areas
created to mitigate conversion of wetlands, if permitted by the county.
B. DESIGNATIONS
The following lands, shorelands and waters of Mason County are hereby designated under RCW
36.70A.060 and RCW 36.70A.170, as critical areas requiring immediate protection from incompatible land
uses:Wetlands and their buffer as specified by Section 17.01.070.E.
In making a determination regarding a wetland, Washington State Wetland Identification and Delineation
Manual(Ecology#96-94),or as amended hereafter, shall serve as the technical resource guide on
determining if an area possesses hydrophytic vegetation, hydric soils, and/or wetland hydrology.
1. The following are designated as regulated wetlands under this Chapter:
a. All areas described in Section 17.01.070.A.;
b. Ponds less than twenty acres;
C. Wetlands created as mitigation, and those modified for approved land use activities,
including their submerged aquatic beds.
2. The following are designated as non-regulated wetlands:
Artificial man made wetlands intentionally created from non-wetland sites, including, but not
limited to, irrigation and drainage ditches, grass-lined swales, canals, detention facilities,
wastewater treatment facilities, farm ponds, and landscape amenities or those wetlands created
after July 1, 1990, that were unintentionally created as a result of the construction of a road, street
or highway.
a_ Exempt wetlands that are isolated and less than 1,000 square feet in area where it has
been shown by the applicant that they are not associated with a riparian corridor, they are not part
of a wetland mosaic and do not contain habitat identified as essential for local populations of
priority species identified by Washington Department of Fish and Wildlife.
b. No measures to avoid impacts for Category III and IV wetlands between 1,000 and 4,000
square feet are required if they meet all the following criteria:
(1) Wetland is not associated with a riparian corridor, and
(2) Wetland is not part of a wetland mosaic, and
(3) Wetland does not score 20 points or greater for habitat in the 2004 Western Washington
Rating System, and
(4) Wetland does not contain habitat identified as essential for local populations of priority
species identified by Washington Department of Fish and Wildlife.
Mason County Resource Ordinance 21 Revised December 27,2006
C. Impacts allowed under this provision to these wetlands will be fully mitigated as required
in mitigation section.
3. Owners and applicants with non-regulated wetlands are strongly urged to cooperate voluntarily in
this plan of wetland protection, using the guidelines in this ordinance and in materials provided by
the Department of Community Development.
C. PROCEDURES
1. Responsibilities for the determination of wetland boundaries:
a. Formal determination of wetland boundaries is the responsibility of the County. The
responsibility to provide all necessary and accurate data to the County for its
determination rests with the applicant. This information will include a field delineation by a
qualified wetland professional applying the Washington State Wetland Identification and
Delineation Manual(Ecology#96-94), or as amended hereafter. When, in the opinion of
the Director, sufficient information exists from the County's wetland inventory, or other
sources, the requirement for a full or partial delineation may be waived. For instance, in
some cases,the applicant may only be required to determine the wetland boundary, or
portion thereof, of the wetland system. The Director shall determine when a permit
application is required and what additional information may be necessary. Wetland
delineations shall be performed in accordance with the procedures as specified in the
Washington State Wetland Identification and Delineation Manual(Ecology#96-94), or as
amended hereafter. Evidence documenting the results of any boundary survey, or other
submitted data, may be required by the Director.
b. Mason County, at a fee, when requested by the applicant, or the affected party, may
perform the delineation in lieu of direct action by the applicant. Mason County may use
hydrology, soils, plant species, and other data, and consult with biologists, hydrologists,
soil scientists, or other experts, as needed,to perform the delineation. The County shall
make a good faith effort to provide this service, consistent with budgetary constraints and
available in-house expertise, for smaller projects and especially for those property owners
with lesser financial capabilities.
G. Where Mason County performs a wetland boundary determination at the request of the
applicant, it shall be considered a final determination unless contested.
d. Where the applicant has provided a determination of the wetland boundary, the Director
shall verify the accuracy of, and may render adjustments to, the boundary delineation.
e. In the event the boundary delineation is contested by the applicant or affected party, the
Department of Ecology, or a mutually agreed upon party, shall settle the dispute.
D. LAND USES
1. Mason Environmental Permit Required Uses and Activities
A Mason Environmental Permit shall be obtained from the County, using the administrative review
process in this Chapter, prior to undertaking, in a regulated wetland or its buffer, for the following
activities.
a. In all regulated wetlands, the removal, excavation, grading, dredging, dumping,
discharging, or filling of any material; or the draining or flooding of the site, except where
undertaken for maintenance (but not construction) of drainage ditches or for emergency
repair;
b. The construction of stormwater management facilities; or '
C. The driving of pilings;
d. The placing of obstructions;
e The construction, reconstruction, demolition, or expansion of any structure,
f. The destruction or alteration of wetlands and wetland buffer through clearing, harvesting,
shading, intentional burning, or planting of vegetation that would alter the character of a
designated wetland or buffer, provided that this subsection shall not apply to the following
activities undertaken in a manner which minimizes impacts:
Mason County Resource Ordinance '? Revised December 27, 2006
(1) The harvesting or normal maintenance'of vegetation in a manner that is not
injurious to the natural reproduction of such vegetation;
(2) The removal or eradication of noxious weeds so designated in Chapter 17.10
RCW or other exotic, nuisance plants;
(3) Site investigative work necessary for land use application submittals such as
surveys,soil logs and percolation tests;
(4) The construction or trails which shall be unpaved when located in the buffers and
elevated when located in wetlands,which are not intended for motorized use, and
which are no wider than three (3)feet,unless additional width is necessary for
safety along a precipice,steep hillside,or other hazardous area. See section
17.01.070.E.6.c.for additional details on regulated(but permitted)trail activity.
(5) Emergency services or repairs for health and welfare; or
(6) Activities of a mosquito control district.
(7) The removal of a danger tree,.provided that such removal is mitigated by planting
in the vicinity of the removed tree a total of six(6)new trees, each of a minimum
three(3)feet in height and each of the sa..ne species or native species as the
removed tree. If the replacement tree planting is judged to be unnecessary to
replace the canopy structure of a vegetation area, the Director may request the
applicant leave or place the danger tree within the vegetation area as habitat.
g. Activities that result in a significant change of water temperature, a significant change of
physical or chemical characteristics of wetland's water sources, including quantity, or the
introduction of pollutants.
2. Activities Permitted without a Mason Environmental Permit
The following uses shall be allowed, in addition to those defined in General Exemptions (see
Section 17.01.130),within a wetland or wetland buffer to the extent that they are not prohibited by
the Shorelines Management ACT of 1971 (Chapter 90.58 RCW), Federal Water Pollution Control
Act(Clean Water ACT), State Water Pollution Control Act(Chapter 90.48 RCW), State Hydraulic
Code(RCW 75.20.100- .140), Forest Practices Act(Chapter 76.09 RCW and Chapter 222-16
WAC)or any other applicable ordinance or law and provided they are conducted using best
management practices, except where such activities result in the conversion of a regulated
wetland or wetland buffer to a use to which it was not previously subjected and provided further
that forest practices and conversions from forest land shall be governed by Chapter 76.09 RCW
and its rules:
a. Conservation or preservation of soil,water, vegetation, fish, shellfish, and other wildlife;
b. Outdoor recreational activities that do not have a significant adverse impact on the
wetland and its related buffer;
C. The harvesting of wild crops in a manner that is not injurious to natural reproduction of
such crops and provided the harvesting does not require tilling of soil, planting of crops, or
alteration of the wetland by changing existing topography, water conditions or water
resources;
d. Existing and ongoing agricultural activities, including farming, horticulture, aquaculture,
irrigation, ranching or grazing of animals_ Activities on areas lying fallow as part of a
conventional rotational cycle are part of an ongoing operation.Activities which bring an
area into agricultural use are not part of an ongoing operation. An operation ceases to be
ongoing when the area in which it was conducted has been converted to another use or
has lain idle for more than five years unless that idle land is registered in a federal or state
soils conservation program. Forest practices are not included in this definition.
e. The maintenance (but not construction)of drainage ditches;
f. Education, scientific research, and use of nature trails;
g. Site investigative work necessary for land use application submittals such as surveys, soil
logs, percolation tests and other related activities. In every case, wetland impacts shall be
minimized and disturbed areas shall be immediately restored; and
h. The following uses are allowed within wetlands and/or wetland buffer, provided that any
required permits or approvals are obtained and further provided that wetland impacts are
minimized and that disturbed areas are immediately restored:
(1) Normal maintenance, repair, or operation of existing serviceable structures,
Mason County Resource Ordinance 2 1 Revised December 27, 2006
facilities, or improved areas. Maintenance and repair does not include any
modification that changes the character, scope, or size of the original structure,
facility, or improved area and does not include the construction of a maintenance
road; and
(2) Minor modification of existing serviceable structures within a buffer zone where
modification does not adversely impact wetland functions.
(3) Repair or reconstruction of damaged or destroyed structures within two years of
the damage or destruction.
E. DEVELOPMENT STANDARDS
1. Wetlands Rating System
A four-tier wetlands rating system is hereby adopted as the rating system for Mason County.
Wetland buffer widths,wetland activities, and replacement ratios shall be based on this rating
system.
Procedures for applying the wetland rating system are set forth in the Washington State Wetland
Rating System for Western Washington, revised 2004, or as amended hereafter, Washington
State Department of Ecology.
a. Wetlands shall be categorized as follows:
Table 17.01.070 A
1) Category 1 Wetlands. Category I wetlands are those regulated wetlands that include but
are not limited to rare, unique wetland types that are more sensitive to disturbance than most
wetlands and that contain ecological attributes that are impossible to replace within a human
lifetime. Category 1 wetlands score 70 points or more out of 100 on the wetlands ratings
systems.
2) Category II Wetlands. Category 11 wetlands are those regulated wetlands that score
between 51-69 points out of 100 on the wetlands ratings system.
3) Category III Wetlands. Category III wetlands are those regulated wetlands that score
between 30-50 points on the wetlands ratings system.`
4) Category IV Wetlands. Category IV wetlands are those regulated wetlands that score
less than 30 points out of 100 on the wetlands ratings system."
5) Wetlands intentionally created from non-wetland areas to mitigate conversion of other
wetlands.
6) Mosaic wetlands as defined in 17.01.240.
"Non-Regulated Wetlands. Isolated wetlands under 1.000 square feet which are not associated
with a riparian corridor, not part of a wetland mosaic, and not essential habitat of a priority species
as identified by the Washington Department of Fish and Wildlife.
Please refer to Appendix A or the Department of Ecology publication
for more information.
2. Wetland Buffers
a. Buffer Widths.
Wetland buffers shall be required for all regulated wetlands. Any wetland created, restored, or
enhanced as compensation for approved wetland alterations shall also include a buffer required
for the category of the created, restored, or enhanced wetland. The buffer widths are established
by adjusting a base width for the category of wetland at the site for the habitat value as scored by
the wetland rating system and for the land use intensity of the proposed activity. All buffers shall
be measured horizontally from the wetland boundary as surveyed in the field.
Mason County Resowce Ordinance 24 Revised Oecember 27, 2006
The width of the wetland buffer shall be determined by the following process:
1) The wetland is categorized according to wetland ratings system category as shown in
Table 17.01.070 A;
2) Table 17.01.070 B rates examples of different land uses for intensity of impacts to
wetlands.
3) The width of the buffer is determined based on the habitat value scored by the wetland
on the wetland rating system and on the land use intensity of the proposed use as shown in
Tables 17.01.070 C, D, E. or F_
Table 17 01 070 B. Ratings of impact from land uses
Rating of impact from Examples of land uses that cause the impact based on common
proposed changes in land zoning categories
use
Commercial, Urban, Industrial, Institutional, Retail Sales, Residential
High subdivisions with more than 1 unitlacre, New agriculture (high-intensity
processing such as dairies, nurseries and green houses, raising and
harvesting crops requiring annual tilling, raising and maintaining
animals), New transportation corridors, High intensity recreation (golf
courses, ball fields), hobby farms.
Single-family residential lots, residential subdivisions with 1 unit/acre or
Moderate less, Moderate-Intensity Open Space(parks), New agriculture
(moderate-intensity such as orchards and hay fields),Transportation
enhancement projects.
Low Forestry, Open space(low-intensity such as passive recreation and
natural resources preservation, minor transportation improvements).
Table 17 01 070 C• Width of buffer required to protect Category IV wetlands.
Category IV Wetland Characteristics Buffer Width by impact of land use
Score for functions< 30 points Low -25 feet
Moderate-40 feet
High -50 feet
Mason County Resource Ordinance 25 Revised December 27, 2006
Table 17.01.070 D: Width of buffe[s-required to protect Category 111 wetlands. Wetlands
scoring between 30 and 0 points on the wetlands ratina system
Category III Wetland Characteristics Buffer Width by impact of land use
Moderate level of function for habitat Low-75 feet
(score for habitat is 20-28 pts.)
Moderate- 110 feet
High-. 150 feet
Category III wetlands not meeting above criteria Low-40 feet
(score for habitat is less than 20 pts.) Moderate-60 feet
High- 80 feet
Table 17.01.070 E: Width of Buffers-required to protect Category II wetlands.-Wetlands
scoring between 51 and 69 points on the wetlands rating system.
Category II Wetland Characteristics Buffer Width by impact of land use
(apply most protective)
High level of function for habitat Low- 150 feet
(score for habitat is 29-36 pts.) Moderate-.200 feet
High -225 feet
Moderate level of function for habitat Low-.75 feet
(score for habitat is 20-28 pts.) Moderate-110 feet
High - 150 feet
High level of function for water quality
improvement and low for habitat Low 75 feet
(score water quality is 24-32 pts Moderate-90 feet
and habitat is less than 20) High - 100 feet
Estuarine Low- 75 feet
Moderate 110 feet
High - 150 feet
Category II wetlands not meeting above criteria Low- 50 feet
Moderate -75 feet
High - 100 feet
Mason County Resource Ordinance 26 Revised December 27, 2006
Table 17 01 070 F• Width of Buffers required to protect Category I wetlands.Wetlands
gcoring over 70 points on the wetlands rating-system
Buffer Width by impact of land use
Category I Wetland Characteristics (apply most protective)
Natural Heritage Wetlands and Bogs Low-125 feet
Moderate- 190 feet
High-250 feet
Forested Buffer size to be based on score for habitat
functions or water quality functions see below.
Estuarine and Wetlands in Coastal Lagoons Low- 100 feet
Moderate-200 feet
-High-250 feet
High level of function for habitat
(score for habitat is 29-36 pts.) Low-150 feet
Moderate-225 feet
High-250 feet
Moderate level of function for habitat Low-75 feet
(score for habitat is 20-28 pts.) Moderate- 110 feet
High-200 feet
High level of function for water quality
improvement(WQI) (score is 24-32) Low 50 feet
and low for habitat (score for habitat is less than
20 points) Moderate-75 feet
High- 100 feet
Category I wetlands not meeting any of the
above criteria Low 50 feet
Moderate-75 feet
High-100 feet
b. Increased Wetland Buffer Width
The Administrator shall require increased standard buffer widths or may require other conditions
be placed on the development on a case-by-case basis when necessary to protect wetland
functions and values based on local conditions. This determination shall be supported by
appropriate documentation showing that it is reasonably related to protection of the functions and
values of the regulated wetland. Such determination shall be attached as a permit condition and
shall demonstrate that:
a) A larger buffer is necessary to maintain viable populations or critical habitat of threatened or
endangered species living within the subject wetland(s)boundaries; or
b) The adjacent land is susceptible to severe erosion and erosion control measures
otherwise required will not effectively prevent adverse wetland impacts; or
c) There are other nearby wetlands or critical areas and adjustments to the buffers would
prevent fragmentation of the habitat or is otherwise necessary to preserve the structure,
function and value of the wetland, or
d) The buffer is poorly vegetated due to lack of vegetation or invasive or non-native species
being the dominant cover. Conditions would include enhancement of the area, a larger buffer,
or both.
Mason County Resource Ordinance 27 Revised December 27,2006
c_ Wetland Buffer Width Averaging.
The boundary of the buffer may be modified by averaging buffer widths. If buffer averaging is
used, the following conditions must be met:
a. The total area contained in the buffer after averaging shall be no less than that contained
within the buffer prior to averaging. In other words, mitigation for buffer impacts will be on
a minimum of a 1: 1 ratio; and
b. Buffer averaging will incorporate site conditions to provide measures to increase the
functions and values of the wetland buffer beyond what is currently in place; and
C. In no instance shall the buffer width be reduced to less than 75 percent of the required
width for each of the wetland categories.
d. Wetland Buffer Reduction.
The width of the buffer may be reduced for proposed land uses with high-intensity impacts under
the following conditions:
a. For wetlands that score moderate or high for habitat(20 points or more for the habitat
functions), the width of the buffer may be reduced to that required for moderate-intensity
impacts provided that:
(1) A relatively undisturbed, vegetated area corridor at least 100-feet wide is protected
between the wetland and any other Priority Habitats as defined by the Washington
State Department of Fish and Wildlife. Protection of the corridor shall be assured by a
conservation easement-
(2) Measures to minimize the impacts of the land use shall be applied. Examples of these
measures are shown in Table X.
b. For wetlands that score less than 20 points for habitat,the buffer width can be reduced to
that required for moderate-impact land uses provided that measures to minimize the
impacts of the land use shall be applied. Examples of these measures are shown in Table
X.
e. Wetland Buffer Conditions.
Except as otherwise specified,wetland buffers shall be retained in their natural condition. Where
buffer disturbance has occurred during construction, revegetation of the buffer with native plant
species may be required.
3. Permitted Uses In A Wetland Buffer.
Regulated activities shall not be allowed within a buffer except as follows:
a. Activities that are permissible within a wetland shall be permissible within a wetland buffer; and
b. Stormwater management facilities (bioswales and dispersal trenches)only when required to
allow a reasonable use of the property. Encroachment into the buffer shall be the minimum
necessary and will be permitted only within the outer twenty-five (25)feet or outer twenty-five
percent(25%)of the buffer, whichever is more restrictive.
C. Other passive activities such as recreational trails and tot lots are also permitted within the outer
twenty-five percent(25%)of the buffer.
d. Selective commercial timber cutting will be limited to the outer twenty-five percent (25%) of Category
I and II wetland buffers and fifty percent (50%)of Category III and IV wetland buffers. No more than
thirty percent(30%)of the merchantable trees may be harvested in this area on a one-time-only
basis as associated with a land use conversion application. The thirty percent(30%) harvest must be
representative and maintain an intact forest community character. The percentage and species
distribution of all trees must be consistent before and after the selective timber harvest.
Mason County Resource Ordinance 28 Revised December 21 2006
TABLE X Examples of measures to reduce impacts to wetlands.
Examples of Activities and Uses that Cause Examples of Jlea cures to Jlinilnize Impacts
Disturbance Disturbances
Lights • Parking tots • Direct lights away fi-am wetland
• Warehouses
• 1lanufactusing
• Residential
Noise • ylanufactming • Locate activity that generates noise away
• Residential fiom Wetland
Toxic runoff* • Pat-king lots • Rcaue all new,untreated runoff away frcnl
�a
• Roads etland:i-hlle ensuing diertand is not
• �Ianufactllring de:va#erect
•Establish covenants limiting use of
1 • Residential areas pesticides within 150 ft of wetland
• Application of aertcultural 9 Apply integrated pest management
pesticides
• Landscaping
Jt•1n+ti a-e1 • Parking Lots • Retrofit stotxnu•ater detentian and treatment
11a` Roads fcr reads and existing adjacent
development
• Manufacturine
• ?,event channelized flow hem lawns that
Residential areas dlrectl_-,enters the buffer
• C"onunercial
• Landscaping
Clunze iv, • Impermeable-surfaces • I_ifiltrate or;teat.detaur_and disperse into
r:Ater 1e,il le . Lai_: buffer new rt ncff from itnpet7ious
s;:xfnces acid new lawns
Titling
Pet;and • Residenrtal areas • e pri,ac':fencitio:plant dense venation
huuran to delin-eate bit fer edge::nd to disccuras-e
dtsht[$an.e d stirr'•Jauce t1SL1g,+Y?eMti,2n 3ppt-�-Yn13te
f,:r the eccte?icn_place wetland slid Its
buffet ens-separate tract
L7t:st • T,iled held: • ?test inatlaQealent piacticrs to cc*ltrot
clt:st
i leSe pYatllpl?;ILe 1:":� .i?klu.-:e f:r iniaunuins nuiz-ff rf':1'_::itT:led or e-act n=er?il
31?cle-M-ai-11-e _a?.
Mason County Resource Ordinance 29 Revised December 27, 2006
4. Building Setback Lines
A building setback line of fifteen (15) feet is required from the edge of any wetland buffer. Minor
structural intrusions into the area of the building setback may be allowed if the Administrator
determined that such intrusions will not negatively impact the wetland.
F. MITIGATION FOR WETLAND IMPACTS
As a condition of any permit allowing alteration of wetlands and/or wetland buffers, the County shall
require that the applicant engage in the restoration,creation or enhancement of wetlands and their buffers
in order to offset the impacts resulting from the applicant's actions. If wetland or wetland buffer impacts are
proposed, a sequence of review must be considered. First, the applicant must consider avoiding the
wetland or wetland buffer. If the applicant can not avoid the wetland or wetland buffer,they must consider
reducing (or minimizing)the impact. Impacts which can not be avoided must be mitigated as provided in
this ordinance. Mitigation for buffers shall be on a minimum 1:1 ratio.Approval of the mitigation plan shall
be signified by a notarized memorandum of agreement signed by the applicant and Director of the
Department of Community Development or designee, and recorded with the Mason County Auditor. The
agreement shall refer to all requirements for the mitigation project. The County may suspend or revoke a
permit if it finds that the applicant has not complied with the conditions or limitations set forth in the permit
or has exceeded the scope of work set for in the permit. The overall goal of any compensatory project
shall be no net loss of wetland function and acreage.
1. Wetland mitigation ratios are illustrated in the following Table 17.-01.070 H.
2. Wetland Restoration, Creation and Enhancement(see details in 17.01.200 1)
3. The department may increase or decrease the ratios based on one or more of the following:
a. Replacement ratios may be increased under the following circumstances:
(1)Uncertainty exists as to the probable success of the proposed restoration or creation;
(2)A significant period of time will elapse between impact and establishment of wetland
functions at the mitigation site;
(3)Proposed compensation will result in a lower category wetland or reduced functions
relative to the wetland being impacted; or
(4)The impact was an unauthorized impact.
b. Replacement ratios may be decreased under the following circumstances:
(1) Documentation by the applicant provides more certainty that the proposed compensation
actions will be successful. For example, demonstrated prior success with similar
compensation actions as those proposed, and/or extensive hydrologic data to support
the proposed water regime;
(2) Documentation by the applicant demonstrates that the proposed compensation actions
will provide functions and values that are significantly greater than the wetland being
impacted; or
(3)The proposed mitigation actions are conducted in advance of the impact and are shown
to be successful.
Mason County Resource Ordinance 30 Revised December 27, 2006
Table 17.01.070 H:Wetland Miti ation Re lacement Ratios Table
1:1
Re-establishment Reestablishment Enhancement
Wetland Category or Creation Rehabilitation or Only
Creation(RIC)and
Enhancement E
All Category IV 1.5:1 3:1 1:1 RIC and 2:1 E 6:1
All Category 111 2:1 4:1 1:1 R/C and 2:1 E 8:1
4:1 rehabilitation of
Category II Case-by-case an estuarine Case-by-case Case-by-case
Estuarne wetland
All other 3:1 8:1 1:1 R/C and 4:1 E 12:1
Category II
Category 1 6:1 12:1 1:1 R/C and 10:1 E 24:1
Forested
Category 1 4:1 8:1 1:1 R/C and 6:1 E 16:1
other
Category 1 6:1 rehabilitation of
Natural Heritage Case-by-case a Natural Heritage Case-by-case Case-by-case
site site
Category 1 6:1 rehabilitation of
Coastal Case-by-case a coastal lagoon Case-by-case Case-by-case
Lagoon
Category I 6:1 rehabilitation of
Case-by-case Case-by-case Case-by-case
Bog a bog
6:1 rehabilitation of
Category I Case-by-case an estuarine Case-by-case Case-by-case
Estuarine wetland
Mason County Resource Ordinance 3 1 R-vised Decernber 27, 2006
4- Off-Site Compensatory Mitigation.
a. Considerations for determining whether off-site mitigation is preferable include, but are not
limited to:
(1) On-site conditions do not favor successful establishment of the required vegetation type,
or lack the proper soil conditions, or hydrology;
(2)On-site compensation would result in an aquatic habitat that is isolated from other natural
habitats or severely impaired by the effects of the adjacent development;
(3)Off-site location is crucial to one or more species that is threatened, endangered, or
otherwise of concern, and the on-site location is not;
(4)Off-site location is crucial to larger ecosystem functions, such as providing corridors
between habitats,and the on-site location is not; and
(5)Off-site compensation has a greater likelihood of success or will provide greater functional
benefits.
b. When determining whether off-site mitigation is preferable, the value of the site-specific
wetland functions at the project site, such as flood control, nutrient retention, sediment
filtering, and rare or unique habitats or species, should be fully considered.
c. When conditions do not favor on-site compensation, off-site compensatory mitigation should
be located as close to the impact site as possible, at least within the same watershed, while
still replacing lost functions.
5. Monitorinq Requirements.
Mason County shall require monitoring reports on an annual basis for a minimum of five years and
up to ten years, or until the department determines that the mitigation project has achieved success.
The wetlands mitigation plan shall provide specific criteria for monitoring the mitigation project.Criteria
shall be project-specific and use best available science to aid the department in evaluating whether
or not the project has achieved success.
G. PERMIT REVIEW
The basic concern in the permitting process is to avoid and minimize wetland impacts. Permits are issued
when the applicant can demonstrate that the activity is both unavoidable and necessary. The applicant must
state the purpose of the proposed project, and demonstrate the requirement for a wetland location or access
across wetlands, and the reason it cannot be located at other sites, or at another location on-site.
APPENDIX A
The following is from:
Hruby,T.2004.Washington State wetland rating system for western Washington—Revised.Washington State
Departmeat of Ecology Publication#04-06-025. Pages 6 to 10.
3. RATIONALE FOR THE CATEGORIES
This rating system is designed to differentiate between wetlands based on their sensitivity to disturbance, rarity,
the functions they provide, and whether we can replace them or not. The emphasis is on identifying those
wetlands:
•where our ability to replace them is low,
• that are sensitive to adjacent disturbance,
that are rare in the landscape,
Mason County Resource Ordinance ? Revised December 21. 2006
•that perform many functions well,
•that are important in maintaining biodiversity.
The following description summarizes the rationale for including different wetland types in each category. As a
general principle,it is important to note that wetlands of aU categories have valuable functions in the landscape,
and all are worthy of inclusion in programs for wetland protection.
3.1 CATEGORY t
Category I wetlands are those that 1) represent a unique or rare wetland type; or 2)are more sensitive to
disturbance than most wetlands;or 3)are relatively undisturbed and contain ecological attributes that are
impossible to replace within a human lifetime; or 4)provide a high level of functions.We cannot afford the risk of
any degradation to these wetlands because their functions and values are too difficult to replace. Generally, these
wetlands are not common and make up a small percentage of the wetlands in the region.Of the 122 wetlands
used to field test the current rating system only 24(20%)were rated as a Category I. In western Washington the
following types of wetlands are Category I_
Estuarine Wetlands - Relatively undisturbed estuarine wetlands larger than 1 acre are Category I wetlands
because they are relatively rare and provide unique natural resources that are considered to be valuable to
society.These wetlands need a high level of protection to maintain their functions and the values society derives
from them.Furthermore, the questions used to characterize how well a freshwater wetland functions cannot be
used for estuarine wetlands. No rapid methods have been developed to date to characterize how well estuarine
wetlands function.
Estuaries,the areas where freshwater and salt water mix, are among the most highly productive and complex
ecosystems where tremendous quantities of sediments, nutrients and organic matter are exchanged between
terrestrial,freshwater and marine communities. This availability of resources benefits an enormous variety of
plants and animals. Fish, shellfish and birds and plants are the most visible. However,there is also a huge variety
of other life forms in an estuarine wetland: for example, many kinds of diatoms, algae and invertebrates are found
there.
Estuarine systems have substantial economic value as well as environmental value. All Washington State
estuaries have been modified to some degree,bearing the brunt of development pressures through filling,
drainage, port development and disposal of urban and industrial wastes. The over-harvest of certain selected
economic species has also modified the natural functioning of estuarine systems. Many Puget Sound estuaries
such as the Duwamish, Puyallup, Snohomish and Skagit have been extensively modified. Up to 99% of some
estuarine wetland areas in the state have been lost.
Estuaries,of which estuarine wetlands are a part, are a "priority habitat"as defined by the state department of Fish
and Wildlife. Estuaries have a high fish and wildlife density and species richness, important breeding habitat,
important fish and wildlife seasonal ranges and movement corridors, limited availability, and high vulnerability to
alteration of their habitat(Washington State Department of Fish and Wildlife(WDFW),
http://ww\N-wa.gov/wdfw/hab/phslist.htm, accessed October 15, 2003).
Natural Heritage Wetlands—Wetlands that are identified by scientists of the Washington Natural Heritage
Program/DNR as high quality, relatively undisturbed wetlands, or wetlands that support State listed threatened or
endangered plants are Category I wetlands.
High quality, relatively undisturbed examples of wetlands are uncommon in western Washington. By categorizing
these wetlands as Category I, we are trying to provide a high level of protection to the undisturbed character of
these remaining high quality wetlands. Examples of undisturbed wetlands help us to understand natural wetland
processes.
Furthermore, the presence of rare plants in a wetland indicates unique habitats that might otherwise not be
identified through the rating system. Rare plant populations are also sensitive to disturbance, particularly activities
that result in the spread of invasive species.
Mason County Resource Ordinance 33 Revised December 21. 2006
The Washington Natural Heritage Program of the Department of Natural Resources (DNR) has identified important
natural plant communities and species that are very sensitive to disturbance or threatened by human activities,
and maintains a database of these sites.
"These natural systems and species will survive in Washington only if we give them special attention and
protection. By focusing on species at risk and maintaining the diversity of natural ecosystems and native species,
we can help assure our state's continued environmental and economic health."(DNR
http://wwvv.wa.gov/dnr/htddcs/fr/nhp/wanhp.html , accessed October 1, 2002)
Bogs- Bogs are Category I wetlands because they are sensitive to disturbance and impossible to re-create
through compensatory mitigation.
Bogs are low nutrient, acidic wetlands that have organic soils_ The chemistry of bogs is such that changes to the
water regime or water quality of the wetland can easily alter its ecosystem_The plants and animals that grow in
bogs are specifically adapted to such conditions and do not tolerate changes well. Immediate changes in the
composition of the plant community often occur after the water regime changes. Minor changes in the water
regime or nutrient levels in these systems can have major adverse impacts on the plant and animal communities
(e.g.Grigal and Brooks, 1997).
In addition to being sensitive to disturbance, bogs are not easy to re-create through compensatory mitigation.
Researchers in northern Europe and Canada have found that restoring bogs is difficult, specifically in regard to
plant communities(Bolscher 1995, Grosvermier et al. 1995,Schouwenaars 1995, Schrautzer et al. 1996), water
regime (Grootjans and van Diggelen 1995, Schouwenaars 1995) and/or water chemistry(Wind-Mulder and Vitt
2000). In fact, restoration may be impossible because of changes to the biotic and abiotic properties preclude the
re-establishment of bogs(Shouwenaars 1995, Schrautzer et al. 1996). Furthermore, bogs form extremely slowly,
with organic soils forming at a rate of about one inch per 40 years in western Washington (Rigg 1958)_
Nutrient poor wetlands, such as bogs, have a higher species richness,many more rare species, and a greater
range of plant communities than nutrient rich wetlands (review in Adamus and Brandt 1990). They are, therefore,
more important than would be accounted for using a simple assessment of wetland functions (Moore et al. 1989).
Mature and Old-growth Forested Wetlands—Mature and old-growth forested wetlands over 1 acre in size are
"rated"as Category I because these wetlands cannot be easily replaced through compensatory mitigation. A
mature forest may require a century or more to develop, and the full range of functions performed by these
wetlands may take even longer(see review in Sheldon et al. 2004, in press).
These forested wetlands are also important because they represent a second "priority habitat"as defined by the
state department of Fish and Wildlife. "Priority habitats are those habitat types or elements with unique or
significant value to a diverse assemblage of species." (Washington State Department of Fish and Wildlife
(WDFW), http://www.wa.gov/wdfw/hab/phslist.htm, accessed October 15, 2002). NOTE: All wetlands are
categorized as a priority habitat by the WDFW. Mature and forested wetlands, therefore, represent two priority
habitats that coincide.
Wetlands in Coastal Lagoons—Coastal lagoons are shallow bodies of water, like a pond, partly or completely
separated from the sea by a barrier beach. They may, or may not, be connected to the sea by an inlet, but they all
receive periodic influxes of salt water. This can be either through storm surges overtopping the barrier beach, or by
flow through the porous sediments of the beach.
Wetlands in coastal lagoons are placed into Category I because they probably cannot be reproduced through
compensatory mitigation, and because they are relatively rare in the landscape. No information was found on any
attempts to create or restore coastal lagoons in Washington that would suggest this type of compensatory
mitigation is possible. Any impacts to lagoons will, therefore, probably result in a net loss of their functions and
values.
In addition, coastal lagoons and their associated wetlands are proving to be very important habitat for salmonids.
Unpublished reports of ongoing research in the Puget Sound (Hirschi et al. 2003, Beamer et al. 2003)suggests
coastal lagoons are heavily used by juvenile salmonids.
Mason County Resource Ordinance ; t Revised December 27, 2006
Wetlands That Perform Many Functions Very Well-Wetlands scoring 70 points or more(out of 100)on the
questions related to functions are Category I wetlands.
Not all wetlands function equally well,especially across the suite of functions performed.The field questionnaire
was developed to provide a method by which wetlands can be categorized based on their relative performance of
different functions.Wetlands scoring 70
points or more were judged to have the highest levels of function.Wetlands that provide high levels of all three
types of functions (improving water quality, hydrologic functions, and habitat)are also relatively rare. Of the 122
wetlands used to calibrate the rating system in western Washington,only 18 (15%)scored 70 points or higher
based on their functions.
The questionnaire on wetland functions is based on the six-year effort to develop detailed methods for assessing
wetland functions both in eastern and western Washington.These methods currently represent the"best available
science"in rapid assessments of wetland functions.
3.2 CATEGORY II
Category II wetlands are difficult,though not impossible, to replace, and provide high levels of some functions.
These wetlands occur more commonly than Category I wetlands, but still need a relatively high level of protection.
Category 11 wetlands in western Washington include:
Estuarine Wetlands-Any estuarine wetland smaller than an acre, or those that are disturbed and larger than 1
acre are category II wetlands.Although disturbed, these wetlands still provide unique natural resources that are
considered to be valuable to society. Furthermore, the questions used to characterize how well a wetland functions
cannot be used for estuarine wetlands.
Interdunal Wetlands- Interdunal wetlands greater than 1 acre are Category 11 becaixse they provide critical
habitat in this ecosystem (Wiedemann 1984). This resource is important but constitutes only a small part of the
total dune system(Wiedemann 1984). No methods have been developed to characterize how well interdunal
wetlands function,so these wetlands cannot be rated by a score.
Interdunal wetlands form in the"deflation plains"and"swales"that are geomorphic features in areas of coastal
dunes.These dune forms are the result of the interaction between sand,wind,water and plants. The dune system
immediately behind the ocean beach (the primary dune system)is very dynamic and can change from storm to
storm (Wiedemann 1984). For the purpose of rating, any wetlands that are located to the west of the 1889 line
(western boundary of upland ownership)are considered to be interdunal.
Wetlands That Perform Functions Well-Wetlands scoring between 51-69 points (out of 100)on the questions
related to the functions present are Category II wetlands. Wetlands scoring 51-69 points were judged to perform
most functions relatively well, or performed one group of functions very well and the other two moderately well.
3.3 CATEGORY III
Category III wetlands are 1)wetlands with a moderate level of functions (scores between 30-50 points)and 2)
interdunal wetlands between 0.1 and 1 acre in size. Wetlands scoring between 30-50 points generally have been
disturbed in some ways, and are often less diverse or more isolated from other natural resources in the landscape
than Category II wetlands.
3.4 CATEGORY IV
Category IV wetlands have the lowest levels of functions (scores less than 30 points) and are often heavily
disturbed. These are wetlands that we should be able to replace, and in some cases be able to improve. However,
experience has shown that replacement cannot be guaranteed in any specific case. These wetlands may provide
some important functions, and also need to be protected.
Mason County Resource Ordinance 35 Revised December 27, 2006
17.01.110 FISH AND WILDLIFE HABITAT CONSERVATION AREAS
A. PURPOSE.
Fish and wildlife habitat conservation means land management for maintaining species in suitable
habitats within their natural geographic distribution so that isolated populations are not created.
This does not mean maintaining all individuals of all species at all times, but it does mean
intergovernmental cooperation and coordination is critically important in a region. In some cases, it
is sufficient to assure that a species will usually be found in certain regions across the state. The
provisions for the protection of habitat contained in this section can not succeed in their purpose of
supporting viable populations of fish and wildlife species unless other agencies and the public also
act to protect the species. In the case of anadromous fish,the Statewide Salmon Recovery
Strategy identifies that it will take a balanced approach to addressing the factors of decline that are
within human control,including harvest, hatchery,habitat, and hydropower.The underlying
assumption within this section is that impacts to anadromous fish or their habitat or to fish and
wildlife conservation areas shall be avoided or mitigated as detailed in an approved Habitat
Management Plan as described in Section 17.01.110.J. The intent of this Section is to:
1. Protect critical habitat features to support genetically viable populations of fish and wildlife
species and allow for commercial and non-commercial uses;
2. Protect the biological, physical, and chemical components of water quality for the benefit of
aquatic and terrestrial resources, as well as human consumptive uses;
3. Ensure that natural stream and marine shoreline functions such as flow patterns,
production of sediment and large woody debris are maintained with minimal interference or
impact to private property;
4. Protect habitat for federal or state listed endangered,threatened or sensitive fish and
wildlife.
5. Encourage non-regulatory methods of habitat retention whenever practical,through
education,and the Open Space Tax Program_
6. To supplement the Shorelines Master Plan for Mason County to preserve and protect
critical fish and wildlife habitat pursuant to(WAC 365-190-080(5)). It is the intent that this
ordinance will compliment and supplement the Shorelines Master Plan.
7. To implement the Mason County Comprehensive Plan and to achieve these purposes
consistent with the Comprehensive Plan.
B. FISH AND WILDLIFE HABITAT CONSERVATION AREA CATEGORIES.
Fish and wildlife habitat conservation areas include both aquatic and terrestrial areas within Mason
County. The approximate location and extent of critical fish and wildlife habitat areas are displayed
in the Washington Department of Fish &Wildlife's(WDFW)Priority Habitat and Species(PHS)
Program database. Mason County will also use other available information for these critical fish
and wildlife habitat areas, including tribal and federal databases and local knowledge. The following
categories shall be used in classifying critical areas to be regulated under this ordinance:
1. Commercial and recreational shellfish areas.
2. Kelp and eelgrass beds; herring, sand lance, and smelt spawning areas.
3. Naturally occurring lakes and ponds under twenty acres and their submerged aquatic beds
that provide fish or wildlife habitat.
4. Streams.
5. Saltwater Shorelines, and Lakes 20 Acres and Greater in Surface Area.
6. Lakes, ponds, streams, and rivers planted with game fish by a governmental or tribal entity.
Mason County Resource Ordinance 63 Revised December 27. 2006
7. State Department of Natural Resources natural area preserves and natural resource
conservation areas.
8. Areas with which Federal or State endangered,threatened and sensitive species of fish
and wildlife have a primary association. Those species known to be found in Mason
County are listed in Table 1. Protection of species habitats is determined by the State or
Federal listing, and their actual presence near the site subject to review. Other listed and
protected species may be found in Mason County,which are not in Table 1.
8. Other areas that contain habitats and species of local importance(which include juvenile
salmonid migration areas) as listed in Table 1 below. Species of local importance may
include, but are not limited to, State Candidate and Monitor species.
Table 1. Species of Importance that may occur in Mason County
Fish
Bull Trout Sa/velinus confluentis Candidate Threatened
Puget Sound Chinook Onchorynchus tshawytscha Candidate Threatened
Hood Canal Summer Onchorynchus keta Candidate Threatened
Chum
Dolly Varden Sa/velinus ma/ma none none
Amphibians
Western Pond Turtle Clemmys maramorata Endangered Species of
Concern
Cascade Frog Rana cascadae none Species of
Concern
Van Dyke's salamander P/ethodon vandykei Species of Concern Species of
Concern
Tailed Frog Ascaphus truei Monitor Species of
Concern
Olympic Torrent Ryacotriton o/ympicus Monitor none
salamander
Mo//usks
Newcomb's littorine snail Algamorda newcombiana Species of Concern Species of
Concern
Birds
Marbled Murrelet Brachyramphus marmoratus Threatened Threatened
Bald Eagle Haliaetus leucocephalus Threatened Threatened
Northern Spotted Owl Stridex occidentalis Endangered Threatened
Northern Goshawk Accipitergentilis Candidate Species of
Concern
Peregrine Falcon Falco peregrinus Endangered Species of
Concern
Pileated Woodpecker Drycopus pileatus Candidate none
Common Loon Gavia immer Sensitive none
Harlequin Duck Histrionicus histnonicus none Species of
Concern
Mason County Resource Ordinance 64 Revised December 27, 2006
7Blue
morant Phalacrocoraxpenicillatus Candidate none
Flycatcher Contopus boreaus none Species of
Concern
le Aquilla chrysaetos Candidate none
eron Ardea herodiasMonitor None
Falco columbarius Candidate None
in Progne subis Candidate None
Western Bluebird Sialia mexicana Monitor None
aux's Swift Chateura vauxi Candidate None
Mammals
Gray Wolf Canis lupis Endangered Endangered
Pacific Fisher Martes pennanti Endangered Species of
Concern
Townsend's big-eared bat Plecotus townsendii Candidate Species of
Concern
Shelton pocket gopher Thomomys Candidate None
Merriam's Shrew Sorexmerriami Candidate None
Roosevelt elk Cervus elaphus roosevelti none None
Pygmy Shrew Sorexhoyi Monitor None
Table 2. Priority Species not Federally or State listed and not governed by this ordinance.
r
ies Scientific Name State Status Federal Status
Grouse Dendragapus obscurus None None
-tailed Pigeon Colmba fasciata None None
d Duck Aix sponsa None None
Hooded Merganser Lophodytes cucullatus None None
Mountain Quail Oreortyx pictus None None
C. DESIGNATION
The areas classified in Section B above as Fish and Wildlife Habitat Conservation Areas (FWHCA)
are hereby designated under RCW 36.70A.060 and RCW 36.70A.170, as critical areas requiring
proper land management to protect their value and functions.
D. ESTABLISHMENT OF BUFFERS ON FISH & WILDLIFE HABITAT CONSERVATION
AREAS
1. Fish and Wildlife Habitat Conservation Areas shall have Buffers and Building Setbacks
established. The standard buffer and setback requirements are shown in Table 3.
a. Buffers or setbacks shall be maintained along the perimeter of Fish and Wildlife
Habitat Conservation Areas Buffer distances associated with streams shall be
measured horizontally from the ordinary high water mark (OHWM)or channel
migration zone (CMZ),whichever is greater. All other buffer distances shall be
measured horizontally from the established FWHCA perimeter.
b. Buffers shall be retained in their natural condition, except as provided elsewhere in
this ordinance.
C. Building Setback Lines A building setback line of fifteen (15)feet is required from
Mason County Resource Ordinance h> Revised December 27. 2006
the edge of any buffer area, except for Type 1 saltwater and lake excluding Conservancy
Shorelines.
2. The following are special provisions for buffers and setbacks on lots created prior to
December 5, 1996, and which are located on saltwater or on a freshwater lake 20 acres or
larger in size. As stated in the Table 3, there shall be a standard 100 foot buffer for a total
of 100 feet as measured from the ordinary high water mark(OHWM). Provided, however,
that in the following circumstances,these special provisions apply instead of the standard
buffer and setback requirement.
a. Special provision for view protection on subject lots.
Applications for single-family residential construction and meeting the following
conditions shall have buffers and setbacks as described below:
1) Where existing residences are on both sides of and within 150 feet of the lot line of
the subject lot,and no more than 200 feet from the shoreline OHWM, the setback
on the subject lot is determined by an imaginary common line drawn across the
subject lot which connects the shore-side roof lines of the first adjacent existing
residences. (See Figure 1).The common line set back may be more or less than
100 feet from the OHWM, provided,however, that:
(a) the buffer shall not be less than 20 feet in width from the OHWM and a
minimum setback from the edge of the buffer is 15 feet;and
(b) there shall be a maximum buffer of 100 feet from the OHWM with the balance
of the setback established by the common line to be a building setback area.
(c) if the resulting buffer is less than 100 feet, it will be enhanced for wildlife
function which will include at a minimum planting with native vegetation.
(d) if the resulting buffer is less than 100 feet,the development of site outside the
buffer shall also use best management practices such as those in Appendix C
to limit impacts to the resource.
2) Where an existing residence is on one side of and within 150 feet of the lot line of
the subject lot, and no more than 200 feet from the shoreline OHWM, the setback
on the subject lot is determined by an imaginary common line drawn from the
shore-side roof line of the existing residence and across the subject lot to a point
which is 100 feet from the OHWM along the far lot line of the subject lot. (See
Figure 2). The common line set back may be more or less than 100 feet from the
OHWM, provided, however, that:
(a) the buffer shall not be less than 20 feet in width from the OHWM and a
minimum setback from the edge of the buffer is 15 feet; and
(b) there shall be a maximum buffer of 100 feet from the OHWM with the balance
of the setback established by the common line to be a building setback area.
(c) If the resulting buffer is less than 100 feet, it will be enhanced for wildlife
function which will include at a minimum planting with native vegetation.
(d) If the resulting buffer is less than 100 feet, the development of site outside the
buffer shall also use best management practices such as those in Appendix C
to limit impacts to the resource.
3) As used in this section, a"residence"refers to the principal dwelling/residential
structure and does not include outbuildings or other structures.
4) When applying 1) above, if the shoreline has a high degree of curvature, the
Administrator may use the average set back from OHWM of the two existing
residences rather than the imaginary line between the rooflines in order to
Mason County Resource Ordinance 66 Revised December 27, 2006
establish the common line setback. When applying 2)above, if the shoreline has a
high degree of curvature,the Administrator may use the average of the set back
from OHWM of the existing residence and the 100 foot setback, rather than the
imaginary line between the roofline and the 100 foot setback, in order to establish
the common line setback.
b. Special provision for water-dependent uses on existing lots.
Applications for development defined as water-dependent uses shall provide the
standard 100 foot buffer along as much of the shoreline as possible while making
the minimum necessary adjustments to the buffer to provide for the water-
dependent use, as determined by the Director. Such development shall meet the
requirements of other applicable regulations, including other Resource Ordinance
sections and the Mason County Shoreline Master Program.
Table 3. Fish&Wildlife Habitat Conservation Area Development Standards.
Habitat Type Buffer Buildinq Setback from Buffer
Type S Stream 150 feet 15 feet
Type F Stream 150 feet 15 feet
Type SP Stream 200 feet 15 feet
Type Np Stream 100 feet 15 feet
Type Ns Stream 75 feet 15 feet
Saltwater and Lakes over 20 acres 100 feet 0 feet
excluding Conservancy Shorelines
Conservancy Shorelines*, 100 feet 15 feet
[Saltwater and Lakes over 20 acres
*Conservancy Shorelines are those shorelines designated as Conservancy Shoreline Environment
in the Mason County Shoreline Master Program.
Please see the Definitions section under"Stream"for further explanation.
S =shoreline of the state, F= fish habitat, Np= non-fish habitat with perennial (all year) water,
Ns =non-fish habitat with dry periods or seasonal water flow. **SP stream is proposed for
consideration if any specific streams are identified that are significant in terms of anadromous
fish and recommended to be protected by a larger buffer.
3. Provision for Decreasing Buffer
For major new development, Mason County may decrease the buffer after consultation
with the Washington State Department of Fish and Wildlife and the Skokomish Tribe, the
Quinault Tribe and/or the Squaxin Island Tribe, after review and approval of a Habitat
Management Plan, and after a public hearing. Mitigation must be adequate to preserve or
enhance the functions and values of the critical area. This means that a finding must be
made that the net effect of the proposal equal or better than applying the standard buffers.
If enhancement is part of the mitigation plan, then a greater level of enhancement is
required to offset the time lost while the enhancement matures.
4. Provision for Increasing Buffer.
Mason County may increase the buffer width on a case-by-case basis, after a public
hearing, as provided in subsection 17.01.1201., when a larger buffer is necessary to
protect the structure,function and value of Fish &Wildlife Habitat Conservation Areas.
The buffer shall be increased or other protections shall be provided in order to prevent a
significant adverse environmental impact by a proposed project on those functions and
values. This determination shall be supported by appropriate documentation to be obtained
in consultation with the state of Washington and the Skokomish Tribe, Quinault Tribe
and/or the Squaxin Island Tribe Such determination shall be attached as a permit
Mason County Resource Ordnance 67 Revised December 21. 2006
condition and shall demonstrate that:
a. A larger buffer is necessary to maintain viable populations or critical habitat of
endangered,threatened,or sensitive species;or
b. The adjacent land is susceptible to severe erosion and erosion control measures
will not effectively prevent adverse impacts to the FWHCA; or
C. If the FWHCA contains variations in sensitivity,increasing the vegetation area
widths will only be done as necessary to preserve the structure,function and value
of the FWHCA.
d. If the increase in buffer is based on the upland area feeding substantial material to
the net-shore drift system, as identified in the Mason County Shoreline Inventory
Report,June 12, 1995,that the larger buffer is necessary in maintenance of that
system and the functions and values of the FWHCA. The increase shall
approximate the bluff erosion distance having occurred over the past 50 years,
based on best available information.
5. Lakes and ponds under 20 Acres that are not regulated as wetlands and that do not have
critical habitat for listed species of local importance shall have buffers of 35 feet with an
additional 15 foot building setback.
E. STEWARDSHIP OPTIONS AND INCENTIVES
The purpose of this subsection is to encourage property owners to protect critical areas and their
buffers and to reduce the burden on property owners from the application of the Resource.
Ordinance regulations. Options given below may be used individually, or they may be combined
for greatest effect and benefit.
1. Open Space Bonus Any property owner, except on land designated as Long-Term
Commercial Forest Lands, Agricultural Resource Lands or Mineral Resource Lands, may
apply for a performance subdivision as provided in Chapter 16.22, Mason County Code.
Approval of such a subdivision provides for a development density bonus-that is, it allows
more lots for development-in exchange for the protection of critical areas and meeting
other design requirements.
2. Open Space Tax Assessment and Public Benefit Ratings System: Any property owner
may apply for current use property tax assessment for lands which are fish and wildlife
habitat conservation areas or their buffers pursuant to RCW 84.34. The county is
developing an Open Space Plan and system of evaluating the public benefit rating and an
assessed valuation schedule to provide incentives for property owners to conserve
important open space lands.
a. The land proposed for current use tax assessment shall be in a separate tract or a
conservation easement.
b. Any person who owns an identified critical area or its associated buffer may place
a conservation easement over that portion of the property. A conservation
easement is a legal agreement a property owner makes to restrict the type and
amount of development that may occur on a parcel. Each easement is tailored to
the particular property and to the interest of the individual owner. The property
owner grants an easement to an appropriate governmental agency or non-profit
land trust. It provides significant property and federal income tax benefits to the
property owner. The purpose of the easement shall be to preserve, protect,
maintain, restore and limit future use of the property affected. The terms of the
conservation easement may include prohibitions or restrictions on access and
shall be approved by the property owner and the county.
3. Density Credit On lands containing FWHCAs or their buffers, the county shall allow a
transfer of density for residential uses from the portion of the property containing the critical
areas or buffers to that portion of the property that does not contain critical areas or buffers
- that is, the property could be developed with the same number of lots it would have if
critical areas were not present- provided that such transfer does not create any adverse
impacts to the critical area that can not be adequately mitigated and provided that all other
development regulations can be met.
Mason County Resource Ordinance 68 Revised December 27, 2006
4. Tax Re-assessment. The owner of any property that has been affected by a permit decision by
the county may request an immediate re-assessment by the Mason County Assessors Office, as
provided by RCW Chapter 34.
5. Conservation Futures If approved by a vote of the people of Mason County, Mason County shall
use conservation futures revenue to compensate affected property owners for the impact of
protecting fish and wildlife through the purchase of conservation easements on impacted land or
the impacted land.
6. Education: The county encourages proper stewardship on land to provide benefits to fish and
wildlife. The county shall provide educational information to the public through its sponsorship of
the Washington State Cooperative Extension Service,the Mason Conservation District, or through
the provision of informational materials in its offices.
7. Best Management Practices: Where not otherwise required, Mason County encourages the use
of best management practices that are part of site preparation, development construction, and
use activities after construction: erosion and sediment control measures; maintain existing
vegetation and minimize site clearing; use native plants in landscaping rather than lawn areas;
control runoff to small ponds and buffer vegetation; and minimize use of fertilizers and chemicals
in property maintenance(pest,weed, and moss control; sealants, oils, and fuels).
8. Enhancement. Mason County encourages property owners to enhance critical areas and
buffers which have been degraded by past land clearing and site modification activities or
replaced by noxious vegetation. The county has established a Noxious Weed Board to
assist with this process. Critical area enhancement projects shall require staff review and
needed approvals. Mason County shall waive review fees for enhancement projects that
meet either of the below criteria:
(a) Sponsored Projects. Enhancement projects sponsored by Mason County,
Washington Department of Fish and Wildlife, Mason Conservation District, U.S_ Natural
Resources Conservation Service, U.S. Fish and Wildlife Service, Washington Department
of Natural Resources,or other public agency approved by the Administrator which are
consistent with the Comprehensive Plan, Resource Ordinance, and other plans adopted by
the Board of County Commissioners.
(b) Vegetation Planting/Removal. Planting of native vegetation or removal of non-native
species for the enhancement of the critical area; provided,that such activities are performed using
hand tools and are limited to the area being enhanced; provided further, that watering of newly
planted vegetation is limited to the first three years. Watering of newly planted vegetation on
landslide hazard areas shall require approval of a geotechnical report, mitigation plan or
restoration plan in accordance with this chapter. Allowable hand tools include gas and electric-
powered equipment which is typically moved by hand, including equipment such as chain saws,
hedge trimmers, and lawn mowers-
F. ACTIVITIES WHICH DO NOT REQUIRE A MASON ENVIRONMENTAL PERMIT
The following uses shall be allowed, within a FWHCA or its buffer to the extent that they are not prohibited
by any other applicable law or ordinance, provided they are conducted so as to minimize any impact on
the values and functions of the FWHCA, and provided they are consistent with any county approved
Resource Ordinance Special Study (such as a Habitat Management Plan or Geotechnical Report) or any
state or Federally approved management plan for an endangered, threatened, or sensitive species.
1 a. The remodel, repair, or change of use of an existing building shall be approved within
its existing footprint, plus or minus ten percent as long as the modification does not
increase any intrusion into the FWHCA or its buffer.
b. Reconstruction of structures destroyed by fire or other means shall be approved,
provided that the planned reconstruction occurs within the previous structural footprint
and completed application is made within two years of the destruction. The ten
percent expansion set forth in 1a. may also be applied.
Mason County Resource Ordinance > Revised December 27,2005
c. To further reduce the impacts of existing development,the footprint of existing
structures approved by permit within the FWHCA or its buffer may be combined into
one footprint area equal to or lesser than the original area, provided that:
(1) the combined footprint proposed shall be located in the site of legally established
residences and garages most distant from or less intrusive to the FWHCA or
buffer,and the other structures nearer to the FWHCA shall be removed from the
FWHCA or buffer; and
(2) the square footage area of the structure in the combined footprint may not be
increased more than 20 percent of the total square footage area of the original
structures. The ten percent expansion of footprint set forth in 1 a. does not apply.
For the purpose of this section,footprint does not include uncovered decks and patios.
2. Maintenance and use of existing landscaped areas within the buffer area. An existing
landscaped area is one which is defined by mowed grass,flower beds,orchard trees, non-
native shrubs, and non-native trees. Maintenance and use includes mowing,weeding,
trimming, replacement of vegetation types, placing landscape walls no more than 2 feet in
height, excavating or placing top soil or compost not exceeding 6 inches in depth or 10
cubic yards in total, placing play equipment(swings, slides,temporary plastic above-
ground pools, but not including tree houses or other play houses), and picnic tables and
chairs. Maintenance does not include the removal of native trees over 6 inches in diameter
at 4 foot height. Exposure of more than 200 square feet of soil at any one time requires
stormwater precautions so that no contaminated run off reaches the river,wetland, stream,
or lake. If such maintenance or use in the buffer area is abandoned or discontinued for
greater than three(3)years, activities must conform to the provisions of Section
17.01.110.G.1.
3. All new and existing agricultural activities within any FWHCA and or its buffer complying
with a current conservation plan that conforms with the standards and specifications of the
Natural Resources Conservation Service and is submitted to and approved by the
Administrator; or operating in conformity with a permit of a state agency,except as
required by subsection 17.01.110 G.1.j. below.
4. Buffer alterations for view corridors are allowed with emphasis placed on limbing and with
selective timber removal minimized to the extent possible_ Proposed alterations shall be
the minimum to afford views within the buffer and shall minimize shrub vegetation removal
and ground disturbance while maintaining the large mature trees. Under this provision, no
more than 10 percent of trees in the buffer less than six inches in diameter at breast height
may be cut without specific authorization from Mason County, which may allow removal up
to 20 percent. View corridor improvement actions which include the cutting of trees larger
than six inches in diameter at breast height will require Mason County approval prior to
cutting, replacement with native tree and/or shrub plant species, and are limited to 15
percent of such trees in the buffer. The cutting down of more than 15 percent of such trees
requires a Mason Environmental Permit from Mason County.
5. The removal within buffers of danger trees that pose a direct threat to property and life,
provided the danger trees are documented by a professional forester. Removal of danger
trees shall be mitigated by planting a total of six(6) new trees seedlings each a minimum
three years old and each of the same species as the removed tree or native species trees.
If the replacement is judged to be unnecessary, Mason County may require the applicant
to place the downed danger tree within the buffer as habitat.
6. The removal from buffer areas of noxious weeds designated in Chapter 17.10 RCW and
the enhancement of a buffer by planting indigenous vegetation (see also Section
17.01.110.E.8).
7. The construction of trails associated with residential use which shall be unpaved when
located in the buffer areas and elevated when located in wetlands, which are not intended
for motorized use, and which are no wider than three (3) feet, unless additional width is
necessary for safety along a precipice, steep hillside, or other hazardous area.
Mason County Resource Ordinance 70 Revised December 27.2006
8. A habitat enhancement project that has minimum County review and is subject to the
review and approval by a governmental agency,tribal agency,or fish and wildlife habitat
enhancement group utilizing the process stated in R.C.W.77.55.290.
9. Harvesting of Wild Crops: Harvesting wild crops which do not significantly affect the
viability of the wild crop, the function of the Fish and Wildlife Habitat or regulated buffer
(does not include tilling of soil or alteration of the Fish and Wildlife Habitat Conservation
Area).
10. Any of the General Exemptions authorized by Section 17.01.130.
G. DEVELOPMENT AND ACTIVITIES REQUIRING A MASON ENVIRONMENTAL PERMIT
IN FISH&WILDLIFE HABITAT CONSERVATION AREAS OR THEIR BUFFERS
A Mason Environmental Permit shall be obtained from the County,using the administrative review
process in this Chapter, before undertaking the following activities in FWHCAs or their buffers.
When a major new development is proposed within 1/4 mile of a listed species point location (den
or nest site), as identified through the WDFW PHS data base,tribal and other local fish and wildlife
databases or knowledge, a preliminary review by a qualified fish and wildlife professional shall be
provided to the county which shall determine if a FWHCA or its buffer is within the area of the
development.
1. A Habitat Management Plan (HMP)shall be prepared for these activities:
a. The removal, excavation,grading, dumping,discharging or filling of any material
unless part of a project which has been permitted pursuant to this section or for
which no permit is required.
b. The destruction or alteration of FWHCA's or their buffers through clearing,
harvesting,shading, intentional burning,vegetation removal(terrestrial,
freshwater, or marine), or planting of vegetation that would alter the character of
the FWHCA or buffer, unless part of a project which has been permitted pursuant
to this section or for which no permit is required.
C. New Construction and Major New Development.
1. New residential construction and major new development is not permitted
within FWHCA or its buffer, except for the activities listed in this
subsection G,or as approved through a variance or reasonable use
exception as provided in subsection K.
2. Appurtenant structures not needing building permits,associated with
residential development and located in the FWHCA or buffer may be
permitted.A proposal shall meet the additional review standards of the
Mason County Shoreline Master Program, Resource Ordinance, and other
development ordinances.
3. Saltwater Activities: Accessory uses to existing or new development, such
as a saltwater pier, dock, or float; boat ramp, boat lift, stairways, and stair-
towers will need to meet the additional review standards of the Mason
County Shoreline Master Program, Resource Ordinance, and other
development ordinances. All activities in tidal/saltwater submerged lands
shall avoid impacts to eelgrass and kelp beds to the maximum extent. If
eel grass or kelp is known or suspected in the vicinity, then an aquatic
vegetation survey is required to identify the location of eelgrass or kelp.
Unavoidable impacts to these sensitive marine areas shall be addressed
in a Habitat Management Plan that presents an acceptable mitigation
program. Appendix B has best management practices for docks and
floats.
The design and siting of these projects should not adversely impact water quality
of receiving waters such as wetlands, streams, rivers, Hood Canal or Puget
Mason County Resource Ordinance 71 Revised December 27,2006
Sound. In addition, project design should meet or exceed any storm water design
requirements to avoid any risk of decertification of shellfish beds or impacts to
baitfish (herring, smelt,sand lance,candlefish,etc.)spawning areas.
d. Stream Reiocatiorr. Stream relocations are discouraged except for the purpose of
fisheries restoration and require a Habitat Management Plan. Stream relocation
shall only be permitted when adhering to the following minimum performance
standards and when consistent with Washington State Department of Fish and
Wildlife Hydraulic Project Approval.
i. The channel, bank and buffer areas shall be replanted with native
vegetation that replicates a natural, undisturbed riparian condition; and,
ii. For those shorelands and waters designated as Frequently Flooded Areas
pursuant to Section 17.01.090, a professional engineer licensed in the
State of Washington shall provide information demonstrating that the
equivalent base flood storage volume and function will be maintained.
iii. Relocated stream channels shall be designed to meet or exceed the
functions and values of the stream to be relocated as determined by the
monitoring in the Habitat Management Plan.
e. Bank Stabilization.A stream channel and bank, bluff, and shoreline may be
stabilized when naturally occurring earth movement threatens existing legal
structures (structure is defined for this purpose as those requiring a Building
Permit pursuant to the Intemational Building Code), public improvements, unique
natural resources, public health,safety or welfare, or the only feasible access to
property, and, in the case of streams,when such stabilization results in
maintenance of fish habitat,flood control and improved water quality. Bluff, bank
and shoreline stabilization shall follow the standards of the Mason County
Shoreline Master Program, Landslide Hazard Areas, and any floodplain
management plan adopted by the Board of Commissioners.
Mason County may require that bank stabilization be designed by a professional
engineer licensed in the State of Washington with demonstrated expertise in
hydraulic actions of shorelines. For bank stabilization projects within FWHCAs,
emphasis shall be placed on bioengineering solutions(techniques used alone or in
combination such as beach nourishment, coarse beach fill, gravel berms, or
vegetation rather than hard surfaces such as concrete armoring)unless proved by
the applicant to be infeasible. Bank stabilization projects may also require a
Hydraulic Project Approval from the Washington Department of Fish and Wildlife
and will be determined after consultation with WDFW.
f. Gravel Mining. Gravel mining is discouraged within FWHCAs or their buffers, and
it shall not be permitted if it causes significant adverse environmental impact, but it
may be allowed following the review and approval of a Habitat Management Plan,
including a detailed mining and reclamation plan (required by the Washington
Department of Natural Resources).
g. Conservation. Any conservation, preservation, or enhancement projects to protect
functions and values of the critical area system, including activities and mitigation
allowed pursuant to the mitigation priorities identified in Section I (see also Section
17.01.110.E.8).
h. Outdoor Recreation, Education and Trails Activities and improvements which do not
significantly affect the function of the Fish and Wildlife habitat or regulated buffer
(including viewing structures, outdoor scientific or interpretive facilities, trails, hunting
blinds, etc.) may be permitted in FWHCA or their buffers.
i. Trails and other facilities shall, to the extent feasible, be placed on existing
road grades, utility corridors, or other such previously disturbed areas;
ii. Trails and other facilities shall be planned to minimize removal of trees,
shrubs, snags and important wildlife habitat;
iii. Viewing platforms, interpretive centers, benches and access to them, shall
be designed and located to minimize of impacts to wildlife, fish, or their
Mason County Resource Ordinance 72 Revised December 27. 2006
r
habitat and/or critical characteristics of the affected conservation area.
iv. Trails,in general,shall be set back from streams so that there will be minimal
impact to the stream from trail use or maintenance. Trails shall be
constructed with pervious surfaces when feasible and trails within FWHCAs
are not intended to be used by motorized vehicles.
i. Road/Street Expansion&Conshvction: Any private or public road or street
expansion or construction which is allowed in a Fish and Wildlife Habitat
Conservation Area or its buffer shall comply with the following minimum
development standards:
i. No other reasonable or practicable alternative exists and the proposed
road or street serves multiple properties whenever possible;
ii. Public and private roads should provide for other purposes,such as utility
crossings, pedestrian or bicycle easements,viewing points, etc.; and,
The road or street construction is the minimum necessary,as required by
the Department of Public Works and Fire Marshall,and shall comply with
the Department of Public Works'guidelines and Fire Code to provide
public safety and mitigated storm water impacts. Minimum necessary
provisions may include projected level of service requirements. - ,
iv. Construction time limits shall be determined in consultation with the
Washington Department of Fish and Wildlife in order to ensure species
and habitat protection.
j. Agricultura/Restrictions All new and existing agricultural activities within any
FWHCA or its buffer, unless exempted as provided in subsection 17.01.110.F.3.
2. A Habitat Management Plan (HMP)will not be required the following activities which
comply with the development standards below,except as specified:
a. Stream Crossings: All stream crossings should be discouraged and alternatives
should be explored. Any private or public road expansion or construction which is
proposed and must cross streams classified within this Ordinance,shall comply
with the following minimum development standards:
i. Bridges or arch/bottomless culverts shall be required for all Type S or F
streams (which have anadromous fish habitat). Fish passage shall be
provided, if necessary to address man-made obstructions on site. Other
alternatives may be allowed upon a showing that,for the site under
review, the alternatives would be less disruptive to the habitat or that the
necessary building foundations were not feasible. Submittal of a Habitat
Management Plan which demonstrates that the alternatives would not
result in significant impacts to the Fish and Wildlife Habitat Conservation
Area(FWHCA) may be required if the information necessary to determine
if the permit requirements contained in subsection I. 5. has been met. The
plan must demonstrate that salmon habitat will be replaced at a minimum
1:1 ratio.
ii. Crossings shall not occur in salmonid spawning areas unless no other
reasonable crossing site exists. For new development proposals, if
existing crossings are determined to adversely impact salmon spawning or
passage areas, new or upgraded crossings shall be located as determined
necessary through coordination with the Washington State Department of
Fish and Wildlife and the Skokomish Tribe,the Quinault Tribe and/or the
Squaxin Island Tribe;
iii. Bridge piers or abutments shall not be placed either within the floodway or
between the ordinary, high water marks unless no other reasonable
alternative placement exists;
iv. All stream crossings shall be required to pass 100 year projected flood
flows, even in non-fish bearing Type Np or Ns streams. In addition,
crossings for Type S or F should allow for downstream transport of large
woody debris;
V. Crossings shall serve multiple properties whenever possible.
Mason County Resource Ordinance 73 Revised December 27,2006
vi. Where there is no reasonable alternative to providing a culvert, the culvert
shall be the minimum length necessary to accommodate the permitted
activity.
b. Land Divisions In order to implement the purpose of this section and the County
Comprehensive Plan,to accommodate design innovation, creativity, and flexibility,
and to achieve a level of environmental protection that would not be possible by
typical lot-by-lot development, the use of the Performance Subdivision process
(Title 16 Mason County Subdivision Ordinance)is strongly encouraged. Divisions
of land(Subdivisions, Short Subdivisions, Large Lot Subdivisions)shall comply
with the following development standards:
i. In order to avoid the creation of non-conforming lots, each new lot shall
contain at least one building site that meets the requirements of this
Ordinance, including buffer requirements for habitat conservation areas.
This site must also have access and a sewage disposal system location
that are suitable for development and do not adversely impact the
FWHCA.
ii. After preliminary approval and prior to final land division approval, the
common boundary between a required buffer and the adjacent property
shall be identified using appropriate signs. In lieu of signs, altemative
methods of buffer identification may be approved when such methods
(fences or enhanced native planting)are determined by Mason County to
provide adequate identification to the buffer and the FWHCA.
iii. Buffer areas shall be dedicated as permanent open space tracts,
functioning as FWHCA buffers.
iv. If development is proposed within a FWHCA or its buffer, a HMP is
required.
C. Utilities Placement of utilities within designated Fish and Wildlife Habitat
onservation Areas may be allowed pursuant to the following standards:
i. Construction of utilities may be permitted in FWHCA's or their buffers, only
when no practicable or reasonable alternative location is available and the
utility corridor meets the requirements for installation, replacement of
vegetation and maintenance outlined below. Utilities are encouraged to
follow existing or permitted roads where possible.
ii. Construction of wells, sewer lines, water lines, or on-site sewage systems
are not permitted in FWHCA's but may be permitted in a buffer area when
the applicant demonstrates it is necessary to meet State and/or local
health code requirements; there are no other practicable alternatives
available; and construction meets the requirement of this section. Joint
use of the sewer or water utility corridor by other utilities may be allowed.
Encroachment of more than 50 feet into the buffer will require a HMP.
iii. New Utility Corridors shall not be allowed in FWHCA's with known
locations of federal or state listed endangered, threatened or sensitive
species, heron rookeries or nesting sites of raptors which are listed as
state candidate or state monitor, except in those circumstances where an
approved Habitat Management Plan is in place.
iv. Utility corridor construction and maintenance shall protect the environment
of Fish and Wildlife Habitat Conservation Areas and their buffers.
(1) New utility corridors shall be aligned when possible to avoid
cutting trees greater than 12 inches in diameter at breast height
(four and one-half feet) measured on the uphill side.
(2) New utility corridors shall be revegetated with appropriate native
vegetation at not less than pre-construction vegetation densities
or greater, immediately upon completion of construction or as
soon thereafter as possible due to seasonal growing constraints.
The utility shall ensure that such vegetation survives for a three-
year period-,
V. Utility towers should be painted with brush, pad or roller and should not be
Mason County Resource Ordinance 74 Revised December 27, 2006
sandblasted or spray painted, nor shall lead base paints be used.
d. Forest Practices, Class lV General: Timber harvesting with associated
development activity involving land conversions from Forest Use, or otherwise
meeting the DNR definition as a Class IV General application, shall comply with
the provisions of this Ordinance including the maintenance of buffers, where
required. If harvest or development is proposed within a FWHCA or its buffer, a
HMP is required.
e. Mobile Home orRVParks new or expanded mobile home or RV parks shall comply
with the following development standards:
i. Lots or spaces and other improved areas shall be outside of FWHCA and its
buffer. Roads, utilities, and trails may encroach on the buffer or FWHCA as
provided elsewhere in this section. The project as a whole shall not
adversely impact the FWHCA.
ii. The common boundary between a required buffer and the adjacent property
shall be identified using signs or alternative methods determined Mason
County to provide adequate identification to the buffer and the FWHCA.
iii. Buffer areas shall be designated as open space and preserved to the extent
possible.
iv. If development is proposed within a FWHCA or its buffer, a HMP is
required.
f. 1. Freshwater Activities. Accessory uses to existing or new development,
such as a freshwater pier, dock, or float; boat ramp, boat lift; stairways; stair-
towers; will need to meet the additional review standards of the Mason County
Shoreline Master Program, Resource Ordinance, and other development
ordinances.
2. Park or community recreation development that is water dependent. In
areas maintained as existing developed use for the park or community recreation
land use, new development such as picnic or assembly structures is permitted and
are required to meet the additional review standards of the Mason County
Shoreline Master Program, Resource Ordinance, and other development
ordinances.
g. ChemicalApplication or Storage: Chemical applications are not permitted within
FWHCAs unless expressly approved as part of a farm plan, forest practices
application or for the control of invasive or noxious plant species. In cases where
approved chemical applications occur as part of a forest practices application or
farm plan, proper reporting procedures shall be followed. Chemical application
consistent with state and Federal regulation does not require a Mason
Environmental Permit, but it does need to comply with the standards included
herein. Chemical storage shall not be permitted within a FWHCA or its buffer.
Mason County Resource Ordinance 75 Revised December 27, 2006
H. HABITATS AND SPECIES OF LOCAL IMPORTANCE--LISTING& DELISTING
IMPORTANT HABITATS &SPECIES
1. Locally significant species are those which are not state listed as threatened,endangered
or sensitive, but which live in Mason County, and the species is special importance to the
citizens of Mason County for cultural or historical reasons, or the county is a critically
significant portion of their range. Mason County is a critically significant portion of the
range of a species when any of the following conditions apply:
a. The species would be extirpated from the state of Washington if it is extirpated
from Mason County; or
b. The species' population would be divided into non-viable populations if it is
extirpated from Mason County, where the isolated populations are critical to the
survival of the species; or
C. The species is listed as a state monitor or candidate species and Mason County is
a significant portion of the range of the species and significant reduction or
extirpation of the species from Mason County would result in changing the status
of the species to that of state endangered,threatened,or sensitive.
2. Locally significant habitats are those habitats in which significant species live,or which is of
special importance to the citizens of Mason County because they have been determined to
contribute to the variety of habitats or diversity of species.
3. Regulations prepared to protect locally important habitat and species shall consider and,
where possible,support the economic development of Mason County and the use of
resource lands and resources industry, enhance the affordability of housing, and otherwise
promote the achievement of other goals in the Mason County Comprehensive Plan.
4. The process for listing or delisting an important habitat or species in Mason County shall
be an amendment to this section of the Interim Resource Ordinance. This action may be
initiated by request of the State Department of Fish&Wildlife,the Skokomish Tribe, the
Ouinault Tribe and/or the Squaxin Island Tribe, County staff,or interested citizens. Any
such request shall be in writing and shall include:
a. The common and scientific names of for species under consideration;
b. Habitat location on a map(scale 1:24,000);
C. The reasons for the request, including:
(1) declining or increasing population,
(2) sensitivity to habitat manipulation.
d. Habitat management recommendations, including potential uses and restrictions
of the habitat areas, seasonally sensitive areas, and other guidelines necessary for
the protection of the nominated species_
e. Other supporting documentation, including an analysis which weighs the non-
environmental impacts of the proposal, addressing economics and land use,
against the benefits of the proposed listing.
5. The written request and supporting data may be evaluated by a qualified wildlife biologist
or equivalent professional selected by the County_
6. In addition to the above, the County shall consider the following factors when evaluating
the request:
a. The specificity and scientific validity of the information about the nominated
species needs and behaviors;
b. The sufficiency of habitat areas currently available to sustain the species over
time; and
C. The versatility of the proposed habitat area to sustain species other than the one
being nominated for local species of importance designation.
I. APPLICATION REVIEW PROCESS
1. Upon the receipt of an application for development, the Director shall determine whether
the requirements of this section apply_ The Director may consult with affected Tribes or
state agencies in determining that the subject property is shown to be documented habitat
for federal or state listed endangered, threatened or sensitive species.
Mason County Resource Ordinance 76 Revised December?7 2006
2. Boundaries: The procedures for formal determination of regulated Fish and Wildlife
Habitat Conservation Area boundaries are as follows:
a. The FWHCA boundary for streams shall be the Ordinary High Water Mark
(OHWM)or channel migration zone(CMZ).
b. The FWHCA boundary for marine shorelines and lakes greater than 20 acres shall
be the OHWM.
C. The boundary of all other FWHCA's may be determined using published
databases, resource agency personnel, consultation with the Skokomish Tribe,
Quinault and/or the Squaxin Island Tribe, and/or by a qualified environmental
professional based upon site specific assessment and species presence.
3. Permit information: When a Mason Environmental Permit is required under this section, it
is the applicant's responsibility to provide all necessary and accurate data to the County for
its review. This information will include a field delineation by a qualified professional
(biologist, hydrologist, soil scientist, and/or other expert as circumstances warrant). Formal
boundary determination is the responsibility of the County.
a. When sufficient information exists from the County's natural resource inventory or
other sources, Mason County may waive the requirement of a field delineation,
provided a qualified professional has reviewed and approved such information as
reliable.
b. When requested by the applicant, or an affected party, the County may perform
the data collection, at a fee, in lieu of direct action by the applicant.
C. Where Mason County performs a formal determination at the request of the
applicant pursuant to subsection b above, it shall be considered a final
determination unless contested by the applicant or other affected party.
d. Where the applicant has provided the information in support of a permit for a
formal determination by the County of the Fish and Wildlife Habitat Conservation
Area boundary, Mason County shall verify the accuracy of, and may render
adjustments to,the boundary determination in compliance with the provisions of
this ordinance.
4_ When a Mason Environmental Permit is required, the permit shall be obtained from the
County using the administrative review process in this chapter prior to undertaking
regulated activities in a FWHCA or its buffer-
5- In addition to any other requirements, permits shall only be granted if:
a. The proposed activity avoids adverse impacts to regulated FWHCA, or takes
affirmative and appropriate measures to compensate for impacts. Mitigation
sequencing should follow the avoidance, reduction, and compensation analysis, in
that order of preference, and
b. The proposed activity is consistent with an approved Habitat Management Plan, if
such a plan is prepared; or
C. The proposed activity is approved as a variance or reasonable use exception
under this chapter, if applicable.
6. FWHCA permits shall not be effective and no activity thereunder shall be allowed during
the time provided to file and process a permit appeal.
J. HABITAT MANAGEMENT PLAN (HMP) REQUIREMENTS
The following describes the requirements of a Habitat Management Plan as discussed in this
ordinance.
A HMP shall consider measures to preserve and protect the wildlife habitat and shall consider
effects of land use intensity, buffers, setbacks, impervious surfaces, erosion control and retention
of natural vegetation on the functions and values of the FWHCA. This report shall identify how the
impacts from the proposed use or activity will be avoided or mitigated through habitat mitigation
which meets the purposes of this ordinance. The most recent publication of the Management
Recommendations for Washington's Priority Habitats and Species, as now or hereafter amended,
and consultation with a habitat biologist from the Washington State Department of Fish and Wildlife
and with the Skokomish Tribe, the Quinault Tribe and/or the Squaxin Island Tribe and shall be the
basis for the report. In the case of bald eagles, an approved Bald Eagle Management Plan by the
Washington State Department of Fish and Wildlife meets the requirements for a HMP. For those
Mason County Resource Ordinance 77 Revised December 27, 2006
projects requiring the preparation of a Biological Assessment (BA)or Biological Evaluation (BE)as
part of the application for a Corps of Engineers permit,the approved BA or BE meets the
requirements of a HMP, and the contents of the BA or BE meet the standards listed in J2.
Prior to submittal to the County,the Habitat Management Plan shall be reviewed and approved for
adequacy by a qualified fish and wildlife professional. It shall contain but not be limited to the
following information:
1. A map(s)prepared at an easily readable scale,showing:
a. The location of the proposed site;
b. The relationship of the site to surrounding topographic and built features;
C. The nature and density of the proposed use or activity;
d. Proposed building locations and sizes;
e. A legend which includes:
(1) A complete and accurate legal description and total acreage of the parcel;
(2) Title, scale,date, and north arrow;
(3) Certification by a qualified biologist.
f. Existing structures and landscape features including the name and location of all
water bodies.
g. Location of listed species and their critical habitat areas.
2. A report which contains:
a. A description of the nature, density and intensity of the proposed use or activity in
sufficient detail to allow analysis of such land use change upon identified wildlife
habitat;
b. An analysis of the effect of the proposed use or activity upon fish and wildlife
species and their habitats listed in this ordinance;
C. A plan which explains how the applicant will avoid, minimize or mitigate adverse
impacts to fish and/or wildlife habitats created by the proposed use or activity.This
explanation must address the management goals, policies and recommendations
presented in this ordinance. While species and site specific management practices
will often be required, some general best management practices have been
developed in Appendix C and may be used in the plan.The mitigation plan must
take into account safety issues (including fire safety)resulting from
implementation. For instance, if harvest of trees is proposed, the plan must
account for the presence of snags being left or other features of the plan. If
merchantable timber or other trees can not be harvested safely with the mitigation
proposed,then the merchantable timber or other trees must be left as part of the
management plan. Monitoring of mitigation shall be required when appropriate or
necessary to ensure effectiveness. Mitigation measures within the plan may
include,but are not limited to:
(1) Establishment of buffer areas;
(2) Preservation of critically important plants and trees;
(3) Limitation of access to habitat area;
(4) Seasonal restriction of construction activities;
(5) Clustering of development and preservation of open space;
(6) Sign marking habitats or habitat buffer areas;
(7) Title notice or plat dedication warning statements;
(8) Conservation easements.
3. Review comments by a habitat biologist from the Washington State Department of Fish
and Wildlife(WDFW)and the Skokomish Tribe, the Quinault Tribe and/or the Squaxin
Island Tribe shall be included in the HMP when available. If the HMP recommends
mitigation involving federally listed threatened or endangered species, migratory waterfowl
or wetlands, the U.S. Fish and Wildlife Service shall receive a copy of the draft HMP and
their review comments shall be included in the final report.
This is provided that the Washington State Department of Fish and Wildlife, the Skokomish
Tribe, the Quinault Tribe and/or the Squaxin Island Tribe and, if required, the U.S. Fish and
Wildlife Service respond in writing to Mason County with review comments or a request for
additional information within 28 days from the date of issuance of a draft habitat
Mason County Resource Ordinance 78 Revised December 27,2006
management plan. If review comments or a request for additional information is not
received in the prescribed time frame, the tribal, state and/or federal review comments on
the habitat management plan shall not be required for completion of the HMP. Mason
County shall have the authority to approve Habitat Management Plans or require additional
information.
K. . RELIEF FROM THE REQUIREMENTS IN THIS SECTION
Specific relief from the requirements of this section may be obtained on a case-by-case basis by
applying for a variance (Section 17.01.150) or a reasonable use exception (Section 17.01.120).
Mason County Resource Ordinance 79 Revised December 27,2006
APPENDIX F
Wetland Functions and Values Information
It is important that those involved in wetland regulation and management understand their
functions and values. Knowledge of these roles can be a key factor in the design and
implementation of wetland inventories. Not all wetlands provide each function or value nor do
they provide them to the same degree. Variations occur because of wetland type and
characteristics, as well as regional and local influences. Some local governments try to distinguish
how functions and values relate to their community and region. The following is a brief summary.
Water Supply
With the growth of urban centers and dwindling water supplies, wetlands are increasingly
important as a source of surface and ground water. They can function as recharge areas where
water soaks into the soils, replenishing ground water supplies. Wetlands are also areas where
ground water moves to the surface through springs and seepage, often collecting in pools and
ponds, and supplying critical reserves during periods of drought.
Flood Control
Wetlands are valuable in reducing the impact of flooding. They have the ability to store and slow
the flow of water from upland run-off. If a wetland is associated with a river in a flat valley, the
wetland and its vegetation reduces the height and velocity of flood peaks. Some wetland soils can
store large amounts of floodwater and gradually release them downstream. Construction in flood
plain wetlands causes increase flood heights and rates, and an associated increase in flood damage.
Erosion Control
Vegetated wetlands serve as natural buffers from the effects of tides, waves, wind and river
currents. They dissipate the energy of these erosive forces. The fibrous root systems of wetland
plants bind and stabilize banks, protecting the shoreline from erosion. On the coast, they can limit
wave generation, slow and absorb the impacts of wave energy, and thereby protect inland areas
from storm damage. Construction of bulkheads, rip-rap, and other banked hardening stabilization
techniques simply transfer the erosive energy to neighboring areas.
Pollution and Sediment Control
Wetlands protect and improve the quality of surface and ground waters by removing sediments,
nutrients, heavy metals, and hazardous chemicals. Wetlands vegetation filters particulate matter
from the water. When moving water comes into contact with vegetation, its flow is slowed and
sediment falls out of suspension. The root systems trap the sediment, reducing siltation in
downstream water bodies. Substances such as nutrients, pathogens, and many chemicals are often
bound to the surface of sediment particles. Thus, sedimentation reduces both organic and
inorganic pollutants. These pollutants may be released when wetland soils are disturbed. Wetland
vascular plants and algae also absorb nutrients and chemicals. The micro-organisms utilize
dissolved nutrients and break down organic matter. Research is underway to determine the
impacts of utilizing wetlands as tertiary waste treatment facilities.
Wildlife Habitat
Wetlands, the interface between land and water, are among the richest wildlife habitats in the
world. They provide the conditions essential for the breeding, nesting, feeding, and protection for
many species of waterfowl, mammals, reptiles, and amphibians. These conditions include
abundant water, diverse and rich vegetation, and adequate cover. Many of these species are
"obligates" or dependent upon the wetland for their survival. Some such as the beaver spend their
entire lifetimes in the wetland environment. Others like the salmon inhabit it for shorter, but
critical, parts of their life cycle. Numerous species (such as deer and raccoon) depend on
wetlands as a source of drinking water, food, and winter cover. Wetlands are as critical to the
needs of these species as they are to those that depend solely on wetland habitat. Though many
waterfowl nest primarily in northern freshwater wetlands, they use wetlands through out the
county while migrating and for over-wintering. Birds such as herons, egrets, rails and harriers
depend upon wetlands for their survival. Both salt and freshwater wetlands are important
spawning, nursery, feeding, and wintering areas for sport and commercial fish and shellfish.
Wetlands also support many endangered plant and animal species. Although wetlands constitute
only 5 per cent of the nation's lands, close the 35 per cent of all rare and endangered animal
species are dependent upon them. (McMillan, A. 1986)
Food Web Productivity
Wetlands play an important part in the food.web. Coastal wetlands are among the most productive
areas in the world. Solar energy is utilized by wetland plants to produce hundreds of pounds of
nutrients per acre of salt marsh annually. The vegetation dies, decays, and is broken down to
form a nutrient-rich "soup" called detritus. This rich food source is converted by micro-organisms
into basic nutrients and elements for use by vascular plants and phytoplankton (minute floating
plant life). The phytoplankton are consumed by zooplankton (minute floating animal life). the
detritus and plankton's are carried into tidal creeks, and bays and are consumed by invertebrates
such as oysters, shrimp and crabs. they in turn are preyed upon by other animals including
humans. It has been estimated that 90 per cent of the important commercial marine species either
spend their entire lives in estuarine wetlands or require estuaries as nursery grounds (Kusler, J.
1983). Freshwater wetlands also provide food, habitat, and spawning grounds for many other
species of fish.
Education and Research
Coastal and inland wetlands provide unique opportunities for education and scientific research.
Due to the land-water interface, diversity of vegetation, topography, and the resulting varied
habitats, wetlands are ideal for studying plant and animal life. Because ecological relationships
are easily observed, they are excellent locations for teaching environmental science. The complex
ecological relationships of wetland systems make them valuable areas for scientific research as
well.
Recreation and Aesthetic Values
Wetlands are areas not only of great diversity but also of great beauty. They provide open space
and contrast for both visual and recreational enjoyment, especially valuable in urban areas.
Visitors include photographers, bird watchers, hikers, boaters, hunters, fishers and natural history
enthusiasts. Appreciation and use of wetlands as a recreational resource is steadily increasing on
both a national and state-wide basis. National, wetland-dependent waterfowl are hunted by over 2
million hunters. Nisqually National wildlife Refuge, near Olympia, Washington has had a 300
percent increase on visitor use since 1977. (McMillan, A. 1986)
References
Washington State Department of Ecology, A Guide to Conducting Wetlands Inventories, 1989
DATA FORM
MODIFIED
ROUTINE ON SITE DETERMINATION METHOD
Field Investion tor: Date:agwst � zoor7
._ ,
Project/Site: e a- 4{ County: mnse,-1 State: k.3
Applicant/Owner: oot Surveyor: n
Describe current conditions of wetland and surrounding areas:-T": e c, r'1 c,►-,c�T�Irk�c
Has the vegetation, soils, and/or hydrology been significantly disturbed? Yes No
If yes,what are modifiers:
SOILS
Mapped Series:NAL - M e nnc, a rave q Imm 3 yo GICA)eS
Hydric soils list?: Yes_,?�__No �� Hydric Inclusion? nai
Depth Horizon Color Texture Hydric Soil Indicators Yes No Depth
Matrix Mottle Histosol
0-I(n In g R Z� i v-L to Ilisii:; Epipedon
Gleyed
Sulfidic odor
Concretions
Is the hydric soil criterion met? Yes__&_No
Rationale: %' � l.Us
HYDROLOGY
General wetland type or characteristic: Emergent Scrub/Shrub Forested X
Permanently flooded Seasonally flooded Temporarily flooded Saturated X
Types of water bodies associated with the wetland: River Stream_a Seep/Spring__
Pond/Lake Tidal Drainage ditch/channel Other:
Is the ground surface inundated? Yes—No)(i Surface water depth:
Is the soil saturated? Yes x No Depth to water in test hole: SAX 1tlLheS
Field evidence of surface mundation or soil saturation: Romp
Is the wetland hydrolo criterion met? Yes No
Rationale: = ' (It
SUMMARY
Hydric soil present? Yes No Hydrology present? Yes X _No
Hydrophytic vegetation present? Yes_X No
Percent of FAC, FACW, and OBL species:
Is the site a wetland? Yes ' No
Rationale:`?c)&t-i./e n&C!AyrS W-Cr ��rese-M %c WN
TEST HOLE # OF APPENDIX G
LOCATION OF TEST HOLD eAaYA Wiltermood Associates, Inc.
1015 SW Harper Road
Port Orchard, WA 98367
SEE REVERSE FOR VE TATION , (360) 876-2403
COMMON WETLAND AND NON-WETLAND VEGETATION
Dominant Tree Species
% cover %cover
Pacific willow Salix lucida ssp. lasiandra FACW+ _Sitka spruce Picea sitchensis FAC
_Oregon ash Fraxinus latifolia FACW Western red cedar Thuja plicata FAC
Quaking aspen Populus tremuloides FAC+ 'An Cascara buckthorn Frangula purshiana FAC-
Red alder Alnus rubra FAC _Bigleaf maple Acer macrophyllum FACU
Black cottonwood Popu/us balsamifera FAC _Weitem hemlock Tsuga heterophylla FACU
_Scouler's willow Salix scouleriana FAC _Douglas fir Pseudotsuga menziesii FACU
Other tree species present: —
—5. �t;lcx- Otorr..A W ru nus emora c nc.K .V —
Dominant Shrub Species
Hardhack Spiraea douglasii FACW _Snowberry Symphoricarpos albus FACU
Redosier Dogwood Cornus sericea FACW Scot's broom Cytisus scoparius FACU
Western crabapple Malus fusca FACW _California huckleberry Vaccinium ovatum FACU
_ Black twinberry Lonicera involucrata FAC+ Himalayan blackberry Rubus armeniacus FACU
Devil's club Oplopanax horridus FAC+ _Salal Gaultheria shallon FACU
Salmonberry Rubus spectabilis FAC _Indian plum Oemleria cerasiformis FACU
_Nootka rose Rosa nutkana FAC _Hazelnut Corylus cornuta FACU
Vine maple Acer circinatum FAC- Oregon grape Mahonia nervosa FACU
English ivy Hedera helix FACU _Red huckleberry Vaccinium parvifolium UPI,
_Red elderberry Sambucus racemosa FACU Oceanspray Holodiscus discolor UPL
_Other shrub species present: _
Dominant Forb Species
Skunkcabbage _Iysichitan amaricanum OBL Stinging nettle Urtica diocia FAC+
_Cattail Typha latifolia OBL Velvet grass Holcus lanatus FAC
_Water parsley Oenanthe sarmentosa OBL _Lady fern Athyrium frlix,femina FAC
_Slough sedge Carex obnupta OBL Horsetail Equisetum arvense FAC
Small fruited bulrush Scirpus microcarpus OBL _Youth-on-age Tolmiea menziesii FAC
_owlfruit sedge Carex stipata OBL _Foam flower Tiarella trifoliata FAC-
Tall manna grass Glyceria elata FACW+ _Cat's ear Hypochaeris radicata FACU
Soft rush Juncus effusus FACW+ Trailing blackberry Rubus ursinus FACU
Rushes Juncus spp. FACW _Bracken fern Pteridium aquilinum FACU
Creeping buttercup Ranunculus repens FACW _Sword fern Polystichum munitum FACU
Reed canarygrass Phalaris arundinacea FACW _Bleeding heart Dicentra formosa FACU
Other forb species present: _
Percent of dominant species FAC,FACW,OBL: rl r7 y� UPLAND? WETLAND? X
Is the hydrophytic vegetation criterion met? Yes No WETLAND TYPE: Palustrine_)Riverine
Rationale: yQ ,t V¢1tQ 1S Grealtt' Lacustrine Estuarine
Forested X Scrub/Shrub_ a
Emergent Open Water
Wet Meadow/Pasture
DATA FORM
MODIFIED
ROUTINE ON SITE DETERMINATION METHOD
Field Investigator: -�n e?�1�� a �fl eP t Date:
Project/Site: County: State:
Applicant/Owner: Surveyor:
Describe current conditions of wetland and surrounding areas: K3on Wbue—
�fn� �►1 V A)C AM& &rn�nc,k�_b, r r c o� X1
U
Has the vegetation, soils, and/or hydrology been significantly disturbed? Yes No
If yes, what are modifiers:
SOILS
Mapped Series: n r 1' Lo e S
Hydric soils list?: Yes__2!L_No I Hydric Inclusion?no
Depth Horizon Color Texture Hydric Soil Indicators Yes No Depth
Matrix Mottle Histosol
Ch-ly 104'R31? rSra10 Histic Epipedon
Gleyed
l 10 S 91,41 Sulfidic odor
Concretions
Is the hydric soil criterion met? Yes No
Rationale: S61
HYDROLOGY
General wetland type or characteristic: Emergent Scrub/Shrub Forested
Permanently flooded Seasonally flooded Temporarily flooded Saturated
Types of water bodies associated with the wetland: River Stream Seep/Spring
Pond/Lake Tidal Drainage ditch/channel Other:
Is the ground surface inundated? Yes No X Surface water depth:
Is the soil saturated? Yes No C—Depth to water in test hole:
Field evidence of surface inundation or soil saturation: 00n f!
Is the wetland hydrology criterion met? Yes No
Rationale: r �� '
{
SUMMARY
Hydric soil present? Yes No_ Hydrology present? Yes No G
Hydrophytic vegetation present? Yes Now
Percent of FAC, FACW, and OBL species:qQ
Is the site a wetland? Yes No;_
Rationale: I�pSi>;I�(2 Ind C{rg npi 7re 1 cr 01)L'J
-,,)or-amp Vrs
-
TEST HOLE # OF APPENDIX G
_ �- --- _
LOCATION OF TEST HOLEJ Wiltermood Associates, Inc.
nc�r1h h F 1015 SW Harper Road
APort Orchard, WA 98367
SEE REVERSE FOR VEGETA ON (360) 876-2403
COMMON WETLAND AND NON-WETLAND VEGETATION
Dominant Tree Species
% cover %cover
Pacific willow Salix lucida ssp. lasiandra FACW+ Sitka spruce Picea sitchensis FAC
Oregon ash Fraxinus latifolia FACW _Western red cedar Th4a plicata FAG
Quaking aspen Populus tremuloides FAC+ Cascara buckthorn Frangula purshiana FAC-
Red alder Alnus rubra FAC _Bigleaf maple Acer macrophyllum FACU
Black cottonwood Populus balsamifera FAC _Western hemlock Tsuga heterophylla FACU
Scouter's willow Salix scouleriana FAC Douglas fir Pseudotsuga menziesii FACU
_Other tree species present: _
i tLgr CneCn4 C.Vr,3n%J-, c-nat-o f)A6,,)FRGV _
Dominant Shrub Species
Hardhack Spiraea douglash FACW _Snowberry Symphoricarpos albus FACU
Redosier Dogwood Cornus sericea FACW _Scot's broom Cytisus scoparius FACU
Western crabapple Malus f isca FACW _California huckleberry Vaccinium ovatum FACU
_Black twinberry Lonicera involucrata FAC+ _Himalayan blackberry Rubus armeniacus FACU
Devil's club Oplopanax horridus FAC+ Salal Gaultheria shallon FACU
`jngSalmonberry Rubus spectabilis FAC _Indian plum Oemleria cerasiformis FACU
_Nootka rose Rosa nutkana FAC Hazelnut Corylus cornuta FACU
Vine maple Acer circinatum FAC- _Oregon grape Mahonia nervosa FACU
_English ivy Hedera helix FACU Red huckleberry Vaccinium parvifolium UPL
_Red elderberry Sambucus racemosa FACU Oceanspray .Holodiscus discolor UPL
Other shrub species present: _
Dominant Forb Species
Skunkcabb_age_ Lysichiton americanum OBL Stinging nettle Urtica diocia FAC+
Cattail Typha latifolia OBL _Velvet grass Holcus lanatus FAC
Water parsley Oenanthe sarmentosa OBL _Lady fern Athyrium filix femina FAC
Slough sedge Carex obnupta OBL Horsetail Equisetum arvense FAC
Small fruited bulrush Scirpus microcarpus OBL You Tolmiea menziesii FAC
_owlfruit sedge Carex stipata OBL Foam flower Tiarella trifoliata FAC-
Tall manna grass Glyceria elata FACW+ Cat's ear Hypochaeris radicata FACU
Soft rush Juncus eJfusus FACW+ _Trailing blackberry Rubus ursinus FACU
_Rushes Juncus spp. FACW _Bracken fern Pteridium aquilinum FACU
Creeping buttercup Ranunculus repens FACW _Sword fern Polystichum munitum FACU
Reed canarygrass Phalaris arundinacea FACW _Bleeding heart Dicentra formosa FACU
_Other forb species present!
Percent of dominant species FAC, FACW,OBL: 1.1o/ UPLAND? X WETLAND?
Is the hydro hytic vegetation criterion met? Yes Now_ WETLAND TYPE: Palustrine Riverine
Rationale: h an I S Lacustrine Estuarine
1'jryarn a Forested Scrub/Shrub
Emergent Open Water
Wet Meadow/Pasture