HomeMy WebLinkAboutWetland Delineation, Mitigation Plan - PLN General - 11/14/2022 RECEj V
ED
Nov 14 2022
675 W, Alder Street
Johnson Single-family Residence
PLANNING
Shelton, WA
Wetland Delineation and Mitigation Plan
Prepared for
Brian Johnson
Las Vegas, NV
N Prepared by
Land Services Northwest
120 State Avenue NE #190
LSNW
Olympia, WA 98501
R� June 18, 2020
Table of Contents
Table of Contents
Tableof Contents...........................................................................................................................................i
ExecutiveSummary...................................................................................................................................... iii
1.0 INTRODUCTION.................................................................................................................................1
2.0 GENERAL DESCRIPTION AND LAND USE...........................................................................................3
2.1 Historical and Current Land Use ...........................................................................................3
3.0 METHODOLOGY................................................................................................................................5
3.1 Existing Information Review.................................................................................................5
3.2 Analysis of Existing Information........................................................................................................5
National Wetland Inventory(NWI)Map...............................................................................................................5
NRCSSoils Map...................................................................................................................................................5
USGS7.5 Minute Topo Map.................................................................................................................................9
WADNR Waterbodies and Watercourse Stream Files and Forest Practices Stream Type Map............................9
WDFW Priority Habitats and Species Inventory...................................................................................................9
NOAANOW Precipitation Data...........................................................................................................................9
3.3 Field Investigation...............................................................................................................10
DeterminationGuidelines....................................................................................................................................10
GeneralField Guidelines.....................................................................................................................................10
Table1 Indicator Status Ratings..........................................................................................................................10
3.4 Wetland Study.....................................................................................................................11
FieldSurvey.........................................................................................................................................................1 1
4.0 RESULTS...........................................................................................................................................13
4.1 Existing Conditions..............................................................................................................13
4.2 Wetlands.............................................................................................................................13
WetlandA............................................................................................................................................................13
5.0 WETLAND FUNCTIONAL VALUES ....................................................................................................13
5.1 Wetland Functional Analysis Methodology........................................................................13
5.2 Wetland Functions.............................................................................................................14
WetlandA............................................................................................................................................................14
6.0 REGULATORY CONSIDERATIONS...........................................................................................................15
6.1 Mason County Regulations...............................................................................................................15
WetlandA............................................................................................................................................................15
6.2 Corps Regulations .............................................................................................................................21
i
6.3 Department of Ecology Regulations.................................................................................................21
7.0 WILDLIFE .........................................................................................................................................21
8.0 PROPOSED PROJECT........................................................................................................................21
8.1 Description..........................................................................................................................21
8.2 Development Impacts.........................................................................................................21
8.3 Impact Avoidance and Minimization ..................................................................................21
8.4 Minimization of Water Quality Impacts..............................................................................22
9.0 MITIGATION ..........................................................................................................................................22
9.1 Mitigation Requirements...................................................................................................................22
9.2 Mitigation Functional Analysis...........................................................................................................22
Table 1-Buffer Functions Comparison Before and After Mitigation...................................................................23
9.3 Planting Plan......................................................................................................................................23
Table 2-Plants and Costs(8,947 square feet).....................................................................................................23
9.4 Monitoring Plan.................................................................................................................................24
9.5 Performance Standards.....................................................................................................................25
9.6 Contingency plans.............................................................................................................................25
9.0 SUMMARY AND CONCLUSIONS......................................................................................................26
10.0 LIMITATIONS...................................................................................................................................26
11.0 REFERENCE......................................................................................................................................27
ii
Executive Summary
Site Name:Johnson Single-family Residence
Site Location,Acreage: No Address on Agate Road, 0.926777, .3 acres each
Parcel Number and Legal Description: 220185500006 and 220185500007, TIMBERLAKE#12 TR 6 and
TIMBERLAKE#12 TR 7
Project Staff: Alex Callender, MS, PWS
Field Survey Conducted: March 30, 2020
Project Description: The project proposes a single-family residence, a drinking water well and an onsite
septic system.
Findings: Wetland A was discovered on and offsite. Wetland A is a Forest/Emergent and Aquatic bed
slope/depressional wetland. In accordance with Mason County Code 8.52.110.E—Wetlands
development Standards, Wetland A was rated using the Wetland Rating System for Western
Washington (Hruby, 2014)as a Category III wetland with an overall score of 19 and a habitat score of six
(MMM). Category III wetlands in Mason County with a high intensity land use typically carry a 150-foot
buffer. Mason County allows for a reduction in buffer to that of a medium intensity buffer provided that
the applicant complies with the mitigating measures in code. Therefore, the buffer will be a moderate
intensity 110-foot buffer. A Mason Environmental Permit is required in order to further reduce the
buffer to 60-feet with a 15-foot Building Setback Line as the 110-foot buffer with the 15-foot Building
Setback Line still nearly fully encumber the properties. This will allow for septic placement and still
accomplish the objective of providing a single-family home on each property.
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Wetland Delineation and Assessment Report Johnson Single-family Home
1.0 INTRODUCTION
This report is the result of a critical areas study of the 0.3-acre parcel#'s 220185500006 and
220185500007with the legal description of TIMBERLAKE #12 TR 6 and TIMBERLAKE #12 TR 7
in Shelton, Washington (Figure 1). The purpose of this report is to 1) identify and describe the
wetlands or other critical areas on-site and within 315 ft off-site of the property 2) identify impacts to
wetlands or critical areas and their buffers, and 3) apply mitigation and conservation measures to off-set
any critical areas or buffer impacts.
This report was prepared to satisfy the Resource Ordinance review process required by the Mason
County Code 8.52
The Mason County and possibly other agencies that may evaluate impacts to critical areas from the
proposed project will be able to utilize information in this report.
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Land Semces WI LLC . .�.,.. Figure 1�
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Figure 1-Vicinity Map
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2.0 GENERAL DESCRIPTION AND LAND USE
2.1 Historical and Current Land Use
Historically,the property has been a vacant residential lot with no improvements. The property has
Agate Road to the south,vacant land to the north and single family residences to the east and west.
(Figure 2).
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120 State Avenue NE#190 Current Conditions 0 80 160 320 Feet
Olympia.WA 98501 Parcel#220185500006 and 220185500007
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Figure 2-Current Conditions
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3.0 METHODOLOGY
3.1 Existing Information Review
Background information on possible wetlands and other critical areas was reviewed prior to field
investigations and included the following:
National Wetlands Inventory(NWI) Map, USFWS Shapefile Data (Appendix B)
Mason County Area Soil Survey, Soil Conservation Service (U.S. Department of Agriculture, 1973)
National Resource Conservation Service Shapefiles (NRCS Soils Data Mart, 2006) (Appendix C)
USGS 7.5 Minute Quadrangle Topographic Maps (Appendix D)
Washington Department of Natural Resources Forest Practices Mapping Tool (Appendix E)
Mason County Critical Areas Shapefiles (Appendix F)
Washington Department of Fish and Wildlife Priority Habitats and Species Database (Appendix G)
Washington Department of Fish and Wildlife Salmonscape (Appendix G)
NOAA NOW Precipitation Data (Appendix H)
Washington Department of Natural Resources Natural Heritage Database
United States Hydric Soils List (U.S. Department of Agriculture 1991)
Mason County Code 8.52
3.2 Analysis of Existing Information
An analysis of the above information follows.
National Wetland Inventory (NWI) Map
The National Wetland Inventory(NWI) map (Appendix B), developed by the U.S. Fish and Wildlife
Service (USFWS), shows a Palustrine Unconsolidated Bed Permanently Flooded and Palustine Shrub
scrub seasonally flooded wetlands in the general vicinity of offsite wetlands. There is also a Riverine
Consolidated Bed Intermittenly flooded. These wetlands are located over 170 feet to the north and
west on others property so they were not investigated fully, as they were not accessible.
NRCS Soils Map
The Natural Resources Conservation Service (NRCS) has mapped the site (Appendix C) as containing:
• Alderwood
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Alderwood Series
Landscape--glacial drift plains
Landform--glacially modified hills and ridges
Slope--0 to 65 percent
Parent material-- glacial drift and outwash over dense glaciomarine deposits
Mean annual precipitation--about 1000 mm
Mean annual temperature--about 10 degrees C
Depth class--moderately deep to densic contact
Drainage class--moderately well drained
Soil moisture regime--xeric
Soil temperature regime--mesic
Soil moisture subclass--aquic
TAXONOMIC CLASS: Loamy-skeletal, isotic, mesic Aquic Dystroxerepts
TYPICAL PEDON: Alderwood gravelly sandy loam, forested
TYPE LOCATION: Snohomish County, Washington; about 8 km east of Lynnwood on Maltby road;
61 m south and 122 m east of the center of sec. 28, T. 27 N., R. 5 E., Willamette Meridian;
Bothell, Washington, U.S. Geological Survey quadrangle; latitude: 47.798000, longitude:
122.176000 degrees west, WGS84 (coordinates estimated from PLSS details)
RANGE IN CHARACTERISTICS:
*Mean annual soil temperature--10 to 12 degrees C
*Soil moisture control section--dry 60 to 75 consecutive days following the summer solstice
*Depth to densic contact--50 to 100 cm
*Depth to redoximorphic features with chroma of 2 or less--45 to 75 cm
*Reaction (pH)--5.1 to 6.5
Particle-size control section (weighted average):
*Clay content: 5 to 15 percent
*Rock fragments: 35 to 65 percent
GEOGRAPHIC SETTING:
Elevation--0 to 250 m
Mean annual precipitation--410 to 1500 mm
Mean annual air temperature--9 to 11 C
Frost free period--180 to 240
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
*Drainage class--moderately well drained
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*Depth to perched seasonal water table--30 to 90 cm at times in December through April
*Flooding--none
*Ponding--none
*Saturated hydraulic conductivity (Ksat)--high saturated hydraulic conductivity above the densic
contact and low saturated hydraulic conductivity in the densic material
USE AND VEGETATION:
*Use--timber production, crop production, wildlife habitat, watershed
*Potential natural vegetation-- Douglas-fir, western hemlock, western redcedar, red alder with
an understory of salal, Oregon-grape, western brackenfern, western swordfern, Pacific
rhododendron, red huckleberry, evergreen huckleberry, and orange honeysuckle
Bellingham Soils
he Bellingham series consists of very deep, poorly drained soils formed in loess, alluvium, and
lacustrine sediments. These soils are in depressions. Slopes of 0 to 3 percent. The average annual
precipitation is about 48 inches and the mean annual temperature is about 50 degrees F.
TAXONOMIC CLASS: Fine, mixed, superactive, nonacid, mesic Vertic Endoaquepts
TYPICAL PEDON: Bellingham silty clay loam - pasture. (Colors are for moist soil unless otherwise
noted. All textures are apparent field textures.)
TYPE LOCATION:Thurston County, Washington; 8 miles northwest of Olympia, about 2,100 feet
east and 400 feet south of the NW corner sec. 34, T. 19 N., R. 3 W.
RANGE IN CHARACTERISTICS: Thickness of the solum is 40 to 60 inches or more. The particle-size
control section is 35 to 60 percent clay and 0 to 2 percent rounded pebbles. The mean annual
soil temperature is 47 to 52 degrees F. It is assumed the solum to a depth of 40 inches has a
linear extensibility of 2 to 3 inches.
The A horizon has value of 2 or 3 moist, 3 through 5 dry, and chroma of 1 through 3. Some
pedons have strong brown to dark brown redox concentrations. This horizon has moderate or
strong granular or angular blocky structure. It is moderately acid or slightly acid.
GEOGRAPHIC SETTING: Bellingham soils are in depressions at elevations of 20 to 600 feet. Slopes
are 0 to 3 percent. These soils formed in loess, alluvium and lacustrine sediments. The climate is
characterized by cool, dry summers and cool, moist winters. Average annual precipitation is 25
to 60 inches. Average January temperature is about 39 degrees F; average July temperature is
about 64 degrees F; and the mean annual temperature is about 50 degrees F. Frost-free season
is 150 to 210 days.
DRAINAGE AND PERMEABILITY: Poorly drained; ponded or very slow runoff; slow permeability. A
water table occurs at or near the surface from November through April unless the soil is drained.
USE AND VEGETATION: Bellingham soils are used primarily for cropland and pasture. Grass-
legume hay is the principal crop. Native vegetation is predominantly red alder, western redcedar,
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bigleaf maple, western hemlock and Douglas-fir with an understory of western swordfern,
trailing blackberry, western brackenfern, thimbleberry, salmonberry, huckleberry, and Douglas
spirea.
Kitsap Series
Landscape--plains
Landform--terraces and terrace escarpments
Slope--0 to 70 percent
Parent material--glacial lacustrine sediments
Mean annual precipitation--about 940 mm
Mean annual temperature--about 10 degrees C
Depth class--very deep
Drainage class--somewhat poorly drained
Soil moisture regime--aquic
Soil temperature regime--mesic
Soil moisture subclass--oxyaquic
TAXONOMIC CLASS: Fine-silty, isotic, nonacid, mesic Aeric Endoaquepts
TYPICAL PEDON: Kitsap silt loam, pasture
Ap--O to 15 cm; silt loam,grayish brown (10YR 5/2) dry,very dark grayish brown (10YR 3/2) moist;
moderate fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many
very fine and fine roots; moderately acid (pH 5.8); abrupt smooth boundary
TYPE LOCATION: Pierce County, Washington, about 1.5 km south of Fruitwood Elementary School; 960
m west and 865 m south of the northeast corner of sec. 5,T. 19 N., R.4 E., Willamette Meridian;
Puyallup, Washington, U.S. Geological Survey quadrangle; latitude 47.162 degrees north, 122.324
degrees west, WGS 84 (coordinates estimated from PLSS details)
RANGE IN CHARACTERISTICS:
*Mean annual soil temperature--10 to 12 degrees C
*Soil moisture control section--dry 45 to 60 days following the summer solstice
*Depth to aquic conditions--30 to 50 cm
*Gravel content--0 to 5 percent
*Reaction (pH)--5.1 to 7.3
Particle size control section (weighted average):
*Clay content: 20 to 35 percent
*Sand content:0 to 15 percent
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GEOGRAPHIC SETTING:
Elevation--0 to 165 m
Mean annual precipitation--760 to 1100 mm
Mean annual air temperature--10 C
Frost-free period--160 to 240 days
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
*Drainage class--somewhat poorly drained
*Depth to apparent seasonal water table--30 to 90 cm at times from December to May
*Saturated hydraulic conductivity(Ksat)--high in the A, Bw, and Bg horizons, moderately high in the Cg
horizon
USE AND VEGETATION:
*Use--timber production, crop production, and livestock grazing in cleared areas
*Potential natural vegetation--Douglas-fir, western hemlock, western redcedar, red alder, bigleaf maple,
and willows,with understory of western brackenfern,western swordfern, salal, Oregon-grape,trailing
blackberry, red huckleberry,vine maple, evergreen huckleberry, red elderberry, and wild ginger
USGS 7.5 Minute Topo Map
The USGS has topographical maps that depict natural and artificial features on the landscape including
wetlands. This map shows wetlands offsite to the east in the Vicinity of Wetland A's associated
wetlands (Appendix D).
WADNR Waterbodies and Watercourse Stream Files and Forest Practices Stream Type Map
The WADNR has shapefiles of watercourses and streams which are modeled by the USGS Stream
Invenetory. In addition,the have a Forest Practices Aplication Mapping Tool which shows the stream
classification according to WAC 222-16-032. This map shows a wetland and stream offsite to the east in
the same general direction of the USGS and National Wetland Inventory approximately 170 feet east of
the subject property. The stream to the north and south of the large wetland is shown as a Type F
stream (Appendix F).
WDFW Priority Habitats and Species Inventory
The Department of Fish and Wildlife maintains an inventory of priority habitats and species information.
This database does not show any priority habitats or species. No threatened or endangered species
polygons or points are located within 300 feet of the subject property (Appendix G).
The WDFW Salmonscape data was viewed to determine the status of fish use in the area. No stream or
fish use is found on site or within 300 feet of the property.
NOAA NOW Precipitation Data
NOAA maintains a database that graphs the current precipitation against the wettest, driest, and normal
accumulations of record. This data shows that the precipitation since December 20, 2019 has been
wetter than normal.This is measured (Appendix H).
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3.3 Field Investigation
Determination Guidelines
Land Services Northwest based its wetland identification and delineation upon the 1987 Army Corps of
Engineers Wetland Delineation Manual (Environmental Laboratory, 1987) and the regional specificity
found in Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western
Mountains, Valleys, and Coast Region (Version 2.0) (USACE, 2010). Generally, as outlined in the
manuals,wetlands are distinguished from other landforms by three criteria: 1) hydrophytic vegetation,
2) hydric soils, and 3) wetland hydrology.
General Field Guidelines
Plant species were identified according to the taxonomy in Flora of the Pacific Northwest(Hitchcock and
Cronquist, 1973), and the wetland status of plant species was assigned according to: The National
Wetland Plant List:2016(Lichvar, 2016). Wetland classes were determined by the U.S. Fish and Wildlife
Service's system of wetland classification (FGDC, 2013). The wetland determination was based mainly
on soils, vegetation, and hydrology characteristics indicative of wetland conditions.
The Corps Manual and Supplement describes soil,vegetation, and hydrological indicators of wetlands. A
hydric soil is a soil that formed under conditions of saturation,flooding, or ponding long enough during
the growing season to develop anaerobic conditions in the upper par(National Technical Committee for
Hydric Soils, 1994). Anaerobic conditions cause redoximorphic features to develop, which can be
evidenced through the observation of mottling or gleying in the soil. Soils are hydric if they match the
indicators in the supplement or meet the technical definition.
A soils evaluation was performed to determine if the area contained hydric soils. Additional test plots
were sampled to gage possible wetland indicators and characteristics. Soils are normally excavated to
18 inches or more below the surface within a test pit to evaluate soil characteristics and hydrological
conditions in both wetland and upland areas. Soil chroma (color) is evaluated using the Munsell Color
Chart(Munsell Color, 1988).
The COE describe a wetland rating system for plants. Each plant species is assigned a probability of
occurrence within wetlands,which is referred to as its wetland status. The wetland plant indicator
system is as follows:
Table 1 Indicator Status Ratings
Indicator Status Abrv. Definitions-Short Version ( ERDC/CRREL TN-12-1 )
Obligate OBL Almost always occur in wetlands.
Facultative Wetland FACW Usually occur in wetlands but may occur in non-wetlands.
Facultative FAC Occur in wetlands and nonwetlands.
Facultative Upland FACU Usually occur in non-wetlands but may occur in wetlands.
Upland UPL Almost never occur in wetlands.
(USACE, 2016)
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In general, under the Federal methodology, more than 50 percent of the predominant plant species
within a test plot must be rated FAC or wetter(i.e., FACW, OBL)to satisfy the wetland criteria for
hydrophytic vegetation. Dominant species are those when ranked comprise 50%of the total or those
that have a percent cover greater or equal to 20 percent within the test plot. Only dominant plant
species were considered in the data analysis.
If wetland hydrology, including pooling, ponding, and soil saturation, is not clearly evident, hydrological
conditions may be observed through surface or soil indicators. Indicators of hydrological conditions
include drainage patterns, drift lines, sediment deposition,watermarks, historic records,visual
observation of saturated soils, and visual observation of inundation.
3.4 Wetland Study
Field Survey
A wetland reconnaissance was performed March 20, 2020 to identify wetlands present on the subject
property. Observations were made of the general plant communities,wildlife habitats, and the
locations of potential streams and wetland areas. Present and past land-use practices were also noted,
as were significant geological and hydrological features
Once likely wetland areas were located,the Routine Onsite Determination Method was used to identify
the presence of wetland parameters and to delineate the outer edge of the wetlands using the
procedures outlined in the Corps of Engineers Wetland Delineation Manual(Environmental Laboratory,
1987). The Routine Onsite Determination Method was used in areas that maintained normal
circumstances, were not significantly disturbed, and were not potential problem areas. A formal
wetland delineation was performed on March 20, 2019 to flag and document on-site wetlands and to
identify and map off-site wetlands within 315 feet of the subject property as we are able.
Test pits were dug on March 20, 2020(Figure 3)to develop a better understanding of soil profiles
onsite. Soils were excavated to 18 inches or more below the surface within a test pit to evaluate soil
characteristics and hydrological conditions throughout the site. Soil chroma (color) is evaluated using
the Munsell Color Chart(Munsell Color, 1988). These results were entered in wetland data sheets
(Appendix E).
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WetlandA
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Street—Centerlines
Wetland—A
Land Services NW LLC Figure 3
120 State Pa enue NE#190 Test Pit Locations 0 20 40 80 Feet
Olympia,WA 98501 Parcel#220185500006 and 220185500007
(3&
Figure 3—Test Pit Locations
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4.0 RESULTS
4.1 Existing Conditions
The subject property is flat toward Agate road and then slopes to the North to the vacant lot.
4.2 Wetlands
One wetland, labeled Wetland A were identified during a reconnaissance and formally investigated on
March 20, 2020.
Wetland A
The wetland is a large depressional and slope wetland that starts onsite and flows offsite to the north
and east where it eventually drains to a large ponded depressional wetland found in the same
approximate location as the National Wetland Inventory. Because Wetland A has a separate source of
hydrology and has significantly different functions, the wetlands was rated as a slope wetland and not a
depressional wetland.
Punts
Red alder(Alnus rubra; FAC), Western red cedar(Thuja plicata; FAC), Salmonberry(Rubus spectabilis;
FAC), Himalaya blackberry(Rubus armeniacus; FAC), horsetail (Equisetum arvense; FAC), Slough sedge
(Carex obnupta; OBL)and Skunk cabbage (Lysichiton americanum; OBL) are the dominant hydrophytes
found in this wetland .
sc is
Soils were the secondary indicator of wetlands on the site. Soils in Wetland A are gravelly loam 10YR
3/2 mineral silt loam with a dark grayish brown (10YR 4/2)with many dark yellowish brown
redoximorphic features (10YR 5/6) below the A horizon. The delineation of the wetland area closely
follows the topography of the site where the hydric soils are limited to the lower portion of the hillslope.
Hydrology
It was the rainy season, so hydrology was directly observed at the edge. There was a break in slope at
the point where hydrology was found.
5.0 WETLAND FUNCTIONAL VALUES
5.1 Wetland Functional Analysis Methodology
Wetlands, in general, provide many valuable ecological and social functions, including:
1) stormwater storage, 2)groundwater recharge, 3) erosion control,4)water quality improvement, 5)
natural biological support, 6) overall habitat functions, 7)specific habitat functions, and 8) cultural and
socioeconomic value.
Several procedures have been developed for assessing the importance and magnitude of functions and
include the Washington Functional Assessment Method (WAFAM)Wetland Evaluation Technique,the
Hydrogeomorphic Assessment Method the Habitat Evaluation Procedure (HEP), and numerous regional
and/or local procedures. However, none of these methods were consistent with the needs of this
project.
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Wetland functions were also semi-quantitatively assessed using information gathered while performing
the ECY Wetland Rating System for Western Washington (Hruby, 2014). The scores from the analysis of
the wetland are found in Appendix I.This method is a comprehensive approach requiring substantial
data input and assessment of onsite and landscape functions. The descriptions of wetland functions and
the factors and parameters considered by that method are very helpful in interpreting the functioning of
the subject wetlands and buffer areas. The methodology is scientifically based, in that its application
requires a prior understanding of how wetlands function. Advanced experience,training and scientific
objectivity of a wetland scientist applying the method is essential for an accurate assessment. Alex
Callender has attended and received credit for the training in this method.
5.2 Wetland Functions
Wetland A
Wetland A is an approximately 1 acre on and offsite slope wetland. Wetland A extends off site to the
north and east.
Water Quality Functions
Wetland A has moderate slope,with dense herbaceous vegetation. The slope has a lot of
invasive Himalyan blackberry. It has development above it within 150 feet, so it has the
opportunity to filter out contaminants and silt. No stormwater is directed to the wetland and
there is more than 10%of the overall land use within 150 feet. There are 303d listed waters in
the area and it appears that there is a TMDL in the Basin.
Hydrologic Functions
Generally, slope wetlands do not perform many hydrologic functions as they are limited by their
slope nature. This wetland slope has dense vegetation for half of its area so may attenuate the
flood pulse. The wetland is relatively low in the system so flooding is not a particular problem n
the It is not named as important in the basin for these functions.
Habitat Functions
Wetland A has two vegetation classes Forested with three vegetation layers, and one
hydroperiod as it is seasonally flooded. The wetland is not very diverse, and it has a simple
structure. There are high intensity developments in the area, but they are limited to the
Timberlake's Subdivision as the rest is large lot and not high intensity usage, so it rates
moderate for its position in the landscape for this function. There are snags and logs, so the
wetland has moderate habitat functions.
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6.0 REGULATORY CONSIDERATIONS
6.1 Mason County Regulations
Wetland A
Wetland A was rated using the Wetland Rating System for Western Washington (Hruby, 2014) in
accordance with Mason County Code 8.52.110.E—Wetlands development Standards as Category III
wetland with an overall score of 19, and a habitat score of six (MMM) for Habitat. According to the
Table 8.52.110(B)the land use intensity for the subject properties and the habitat score to determine
buffers would indicate that it is high-intensity as the subject property is less than one unit per acre and
so it would be a Category III wetland with High Intensity which typically carries a 150-foot buffer with a
fifteen foot building setback.
Mason County allows a reduction from the high intensity to the moderate intensity if one applies the
mitigation measures found in 8.52.110. G.
This would bring relief, but there still would not be enough room to provide a home with a septic and
well therefore we are proposing to reduce it further using the Mason Environmental Permit
Table 8.52.110(D): Width of Buffers Required to Protect Category III
Wetlands. Wetlands Scoring Between 16 and 19 Points on the Wetlands Rating
System.
Wetland Characteristics Buffer Widths by Impacts of
Proposed Land Use
Moderate level of function for habitat (score for Low 75 ft
habitat 5 - 7 points)
Moderate— 110 ft
High— 150 ft
Score for habitat 3-4 points Low—40 ft
Moderate 60 ft
High— 80 ft
According to MCC 8.52.d
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Wetland Buffer Reduction.The width of the buffer may be reduced for proposed land uses with high-intensity impacts under the following
conditions:
(i)For wetlands that score moderate or high for habitat(five points or more for the habitat functions),the width of the buffer may be reduced
to that required for moderate-intensity impacts provided that:
a. A relatively undisturbed,vegetated area corridor at least one hundred 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 entire corridor shall be assured by a
conservation easement or equivalent legal protection;
b. Measures to minimize the impacts of the land use shall be applied.Examples of these measures are shown in Table o5Z]10(G).
This would result in a decrease in the buffer from the High intensity impact 150-foot buffer to the
moderate intensity 110-foot buffer with a fifteen-foot building setback (Figure 4a and Figure 4b). This
reduction would still not be enough and would require further reduction using the available measures
found in MCC 8.52.220.variance from the standard as the developable area on parcel #220185500007
would only be 1208 square feet and there would essentially be no buildable area on 220185500006.
Therefore,we are requesting a Mason Environmental Permit to allow reduction of the buffer to 60 feet .
with a fifteen -foot building setback. This will allow for placement of the residence on Parcel
#220185500006.
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Wetland Delineation and Assessment Report Johnson Single-family Home
Y�
Wetland A
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120 State Avenue NE#190 Standard Wetland Buffer
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(360)481-308
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Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
i
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arr WetlandA
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Olympia,WA 98501 Parcel#220185500006 and 220185500007 0 20 40 80 Feet
(360)481-108
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Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
In order to maintain the functions and values of the wetland, the applicant will apply the measures
found in Table 8.52.110(G) as are applicable.
Table 8.52.110(G): Examples of measures to reduce impacts to wetlands.
Examples of Activities and Uses Examples of Measures to Minimize Impacts
Disturbance that Cause
Disturbances
Lights • Parking lots • Direct lights away from wetland
• Warehouses
• Manufacturing
• Residential
Noise • Manufacturing • Locate activity that generates noise away from wetland
• Residential
Toxic runoff' • Parking lots • Route all new, untreated runoff away from wetland while
ensuring wetland is not dewatered
• Roads
• Establish covenants limiting use of pesticides within 150 ft of
• Manufacturing wetland
• Residential areas • Apply integrated pest management
• Application of
agricultural pesticides
• Landscaping
Stormwater • Parking lots • Retrofit stormwater detention and treatment for roads and
runoff existing adjacent development
• Roads
• Prevent channelized flow from lawns that directly enters the
• Manufacturing buffer
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Wetland Delineation and Assessment Report Johnson Single-family Home
Examples of Activities and Uses Examples of Measures to Minimize Impacts
Disturbance that Cause
Disturbances
• Residential areas
• Commercial
• Landscaping
Change in water • Impermeable • Infiltrate or treat, detain, and disperse into buffer new runoff
regime surfaces from impervious surfaces and new lawns
• Lawns
• Tilling
Pets and human • Residential areas • Use privacy fencing: plant dense vegetation to delineate buffer
disturbance edge and to discourage disturbance using vegetation appropriate
for the ecoregion; place wetland and its buffer in a separate tract
Dust • Tilled fields • Use best management practices to control dust
'These examples are not necessarily adequate for minimizing toxic runoff if threatened or endangered species
are present at the site.
Table 2-Summary of Wetlands and Streams on or in the Vicinity of the Subject Property
Size Category Mitigation Ratio
`- N
Wetla tt N
( ra
L 7 U)nd a CO1L c�
� M v CA Y V -O aJ
Y }' c N CO m tJ r_ U C l�6 1=
N +.+C 7 W cu N 41 4J -C 3 E
C p O ro aJ 7 N C O O
O O U CO m cn w U U
No
deA' <.1 acres —2 acre III III 150 60 15 N/A CFO wetland
impacts
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Wetland Delineation and Assessment Report Johnson Single-family Home
1. Palustrine Shrub Scrub Seasonally Flooded
6.2 Corps Regulations
Wetland A flows off site and into the creek below and finally eventually to the Puget Sound,therefore, it
would be maintained as a Water of the US and regulated under the Clean Water Act. No impacts are
proposed to Wetland A
6.3 Department of Ecology Regulations
Under RCW 90.48,the Washington Department of Ecology (DOE) reserves regulatory authority to
regulate "waters of the state" under Section 401 of the Clean Water Act. No wetland impacts are
proposed.
7.0 WILDLIFE
Wildlife observed during the field investigations are typical of urban/suburban adapted species (Table
2).The European starling,American crow, opossum, and other species adapted to urbanization may
inhabit or visit the site for food and shelter.
No other Federally listed, or priority species was observed on the subject property or near the site based
on the WDFW Priority Habitats and Species (PHS) and field observations during the reconnaissance and
delineation. During the limited duration of the site reconnaissance and delineation, no evidence of the
Federally listed Bald Eagle, Marbled Murrelet, or Spotted Owl was observed on-site.
No Federally listed salmonid species are known to occur on-site, based on the WDFW SalmonScape
database, the WDFW PHS database,and site reconnaissance (Appendix H).
No wildlife was observed on site during site visit.
8.0 PROPOSED PROJECT
8.1 Description
The project consists of a single family residence with a well and on site septic drainfield for the purpose
of creating a new residential lot. (See Site Plan)
8.2 Development Impacts
No direct or indirect impacts to the wetland is expected, however the wetland buffer will need to be
reduced using a Mason Environmental Permit to allow development with a reasonable building area. A
mitigation plan has been developed to offset these impacts.
8.3 Impact Avoidance and Minimization
The newly created property is currently vacant land. We have located the home, septic drainfield and
other appurtenances away from the wetland to avoid impacts.
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Wetland Delineation and Assessment Report Johnson Single-family Home
8.4 Minimization of Water Quality Impacts
This is a non-project action and plans to build or develop on the newly created lot will implement the
mitigation sequence of avoidance and minimization to protect critical areas functions and values. No
impacts are proposed at this time.
9.0 MITIGATION
9.1 Mitigation Requirements
Mitigating measures found in Table 8.52.110(G)to meet no net loss of wetland functions and values
will be met through this mitigation plan with the following actions:
• Lights will be directed away from the wetland and buffers;
• Pesticide limited within 150 ft of wetland;
• Runoff will be directed away from the wetland since it is uphill;
• Use LID infiltration on downspouts;
• Plant dense vegetation (8947u square feet) in edge of the clearing area that is proposed for a
buffer adjacent to the proposed lawn;
Invasive Himalayan blackberries, Holly and other invasive species will be removed in the invasive species
removal area between the wetland edge and the reduced property boundary. This will be done by hand
and with herbicide in order to effectively improve the enhancement area.
9.2 Mitigation Functional Analysis
The following planting plan (9.3)will improve and result in no net loss of wetland functions and values
and improve the overall landscape as well by:
• providing increase roughness
• increasing nutrient uptake of stormwater
• Provide screening for wildlife,
• Provide shade for water quality and habitat,
• Produce food for wildlife and structure to an area that was formerly lawn.
Currently,the area that will be improved is functioning as upland field which is compromised by the
invasive blackberries.
The main disturbance from the development will be noise from the driveway and the home.
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Wetland Delineation and Assessment Report Johnson Single-family Home
The mitigation area has trees and some low shrubs, but the edge of the wetland will need shrubs to
screen wildlife from the disturbances created by everyday living and the buffer is not high functioning,
so this will provide a proper buffer in the area where it matters most, near the residence.
The planting plan will provide species diversity and structure.
A comparison of buffer functions has been provided using a qualitative rating similar to that of the
wetland rating system (Hruby, 2014)as this type of resolution has been found to be the best available
science for semi-quantitatively determining functions and values in the field.
Table 1 - Buffer Functions Comparison Before and After Mitigation
Buffer Screening Nutrient Snags Other Structure Surface Temperature Erosion
Perf uptake and Habitat roughness attenuation control
criteria Logs
Features
Before Good Fair Good Fair Fair Fair Fair Good
mitigating
measures
After Better Better Good Fair Better Better Best Better
mitigating
measures
9.3 Planting Plan
The following planting plan will be installed
(Figure 5).
Table 2 - Plants and Costs (8,947 square feet)
Common Scientific Name Spacing Quantity Cost Total
Name
Blue Sambuca nigra 8 ft oc 5 $10.00 $50.00
elderberry
Pacific Rhodedendron 15 ft oc 10 $10.00 $100.00
rhodedendron mocrophyllum
Oceanspray Holodiscus discolor 8 ft oc 10 $5.00 $50.00
Salmonberry Rubus 15 ft oc 10 $5.00 $50.00
spectabulus
Mock orange Philadelphus lewisii 8 ft oc 10 $15.00 $150.00
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Land Services Northwest June 18,2020
f
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120 State Avenue NE#190 Mitigation RlantingArea
Olympia, WA 98501 Parcel #220185500006 and 220185500007 0 10 20 40 Feet
(360)481-408 11 1 i + 1—
Wetland Delineation and Assessment Report Johnson Single-family Home
Pacific Physocarpo 8 ft oc 10 $5.00 $25.00
ninebark capitatus
Sitka spruce Picea sitkensis 5 ft 10 $15.00 $150.00
Total 95 $575.00
Table 3.Total Costs
Labor $1,000 $1000.00
Mulch $100 $100.00
Monitoring w/report(5 years)* $500 $2500.00
Plants and Materials $575.00
Total $1675.00
*Not in bond
Trees and shrubs will be planted at grade in holes 2-3 times the width of the container or root ball.
Mulch will be applied around each tree 2-4 inches deep in a three-foot diameter around the tree with an
edge to retain water. Containerized rootbound trees will be cut with sharp shears on the bottom in an x
pattern to promote root growth. Four cuts will be made vertically to allow roots to spread. Trees and
shrubs will be thoroughly watered in after installation. The whole area will be sheet mulched to prevent
weeds from taking hold and to retain water.
9.4 Monitoring Plan
The planting plan will be monitored for five years following the As—built(Year 0). Monitoring of the
performance standards will be provided each spring, shortly after leaf out, to aid in plant identification.
A report that communicates the findings will be provided to the County staff a month following the
monitoring. The report will contain pictures to allow the County personnel to evaluate site conditions
and performance standards. The photos in the report will be taken in four cardinal directions unless
there is a direction that provides a better view will be taken at 6 photo points that will be established
during the as-built (Year 0). Management of performance deficiencies or maintenance will occur during
the spring or fall season following monitoring and a summary of management actions will be included in
the following year's monitoring report to track effectiveness and adaptively manage the site.
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Wetland Delineation and Assessment Report Johnson Single-family Home
9.5 Performance Standards
The performance standards are as follows:
1. Year 0 an inventory of plants and photo points will be established for monitoring during the
monitoring period within 1 month of the installation.
2. Year 1 will have 100%survival of installed plants. Noxious weeds will be less than 10%aerial
coverage.
3. Volunteers trees or shrubs may account for up to 10 percent of the overall count of surviving
plants. Dead plants will be replaced in kind unless a volunteer is a replacement.
4. Year 2-5 will have a survival rate of 80 percent of the original count. Volunteers can account for
10 percent of the total if present. Noxious weeds such as Himalayan blackberry, Reed canary
grass, and other invasives will not have more than 10 percent aerial coverage of the planting
area. Japanese knotweed yellow flag iris or hogweed will have a zero percent tolerance and be
removed or sprayed using an appropriate herbicide approved for aquatic use by a licensed
applicator
5. Aerial coverage will be at least 50% by year 5
6. Failure to meet standards by year 5 will require an additional year of monitoring or monitoring
until the final standards are met.
9.6 Contingency plans
If the site does not meet performance standards. Contingencies may be developed to adapt to the site-
specific conditions. Contingencies may include:
• Increased watering
• Mulching
• Integrated Pest Management
• Microtopography changes
• Species substitution
• Herbivory protection
• Bark wrap
The area is frequented by deer and the choice of plants were chosen to avoid herbivory issues, but
exclusion fencing may be necessary until the plants reach maturity. This is not expected to be needed to
be a permanent fixture if required.
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Wetland Delineation and Assessment Report Johnson Single-family Home
Any contingencies will be developed in conjunction with landscapers, nursery staff, and other experts.
The county would be notified in advance of the contingency plans. No contingencies will be applied
without county consent.
In accordance with a surety agreement,the applicant will provide a surety of$2093.75 for the proposed
planting plan.
10.0 SUMMARY AND CONCLUSIONS
One wetland was identified on and within 315 feet of the subject property. Wetland A is a Category III
wetland with an overall score of 17 and a habitat score of six maintaining a 60-foot buffer with a fifteen-
foot building setback. The mitigation plan will maintain functions. The project will create a new
residential lot that will result in a sustainable developable lot that will co-exist with the natural resources
of the Mason County
11.0 LIMITATIONS
This report was created with care and best professional judgment using the current best available science,
but the report is subject to interpretation by local state and federal regulators who have the final
regulatory authority on wetlands and other boundary determinations. No outcomes are warranted by
this report.
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Wetland Delineation and Assessment Report Johnson Single-family Home
12.0 REFERENCE
Cowardin, L.M.,V. Carter, F.C. Golet, and E.T. La Roe. 1979. Classification of Wetlands and Deepwater
Habitats of the United States. U.S. Fish and Wildlife Service, Department of the Interior. FWSOBS-70/31.
Environmental Laboratory. 1987. Corps of Engineers Wetlands Delineation Manual. Technical Report Y-
87-1, US Army Engineer Waterways Experiment Station, Vicksburg, Miss.
Federal Geographic Data Committee. 2013. Classification of wetlands and deepwater habitats of the
United States. FGDC-STD-004-2013.Second Edition. Wetlands Subcommittee, Federal Geographic Data
Committee and U.S. Fish and Wildlife Service,Washington, DC.
Hitchcock, C.L., and A. Cronquist. 1973. Flora of the Pacific Northwest. University of Washington Press.
730 pp.
Hruby,T. (2014). Washington State Wetland Rating System for Western Washington: 2014 Update.
(Publication#14-06-029). Olympia, WA: Washington Department of Ecology.
Iowa State University. 1995. Hydric Soils of Washington State. U.S. Department of Agriculture, Natural
Resources Conservation Service. December 5.
Lichvar, R.W., D.L. Banks, W.N. Kirchner, and N.C. Melvin. 2016.
The National Wetland Plant List: 2016 wetland ratings.
Phytoneuron 2016-30: 1-17. Published 28 April 2016. ISSN 2153 733X
Munsell Color. 1988. Munsell Soil Color Charts. Kollmorgen Instruments Corp., Baltimore, Maryland.
National Technical Committee for Hydric Soils (NTCHS). 2015.The hydric soil technical
standard. Hydric Soils Technical Note 11. https://www.nres.usda.gov/Internet/FSE_
DOCUMENTS/nres142p2_051608.pdf(accessed 19 September 2016).
United States Department of Agriculture, Natural Resources Conservation
Service. 2006. Field Indicators of Hydric Soils in the United States, Version 7.0. G.W.
Hurt and L.M.Vasilas (eds.). USDA,NRCS, in cooperation with the National Technical
Committee for Hydric Soils.
U.S.Army Corps of Engineers. 2010. Regional Supplement to the Corps of Engineers Wetland
Delineation Manual: Western Mountains,Valleys, and Coast Region (Version 2.0), ed.J. S. Wakeley, R.
W. Lichvar, and C. V. Noble. ERDC/EL TR-10-3. Vicksburg, MS: U.S. Army Engineer Research and
Development Center.
USDA, NRCS. 2016.The PLANTS Database (http://plants.usda.gov, 5/28/2017).
National Plant Data Team, Greensboro, NC 27401-4901 USA.
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Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
http://Plants.usda.gov
U.S. Fish and Wildlife Service. 1973. National Wetlands Inventory Map, Lacey Quadrangle.
Washington State Department of Ecology. 2014. Washington State Wetland Rating System for Western
Washington. Ecology Publication#04-06-025. August.2014
Washington Department of Ecology.2012. Water Quality Assessment for Washington. Accessed April
30, 2017. http//fortress.wa.gov/ecy/wgamapviewer/default.aspx?res-1280x720
Washington State Department of Natural Resources. 1994. Endangered, Threatened and Sensitive
Vascular Plants of Washington.
Washington State Department of Fish and Wildlife. 1999. Species of concern: State candidate species.
WDFW. Olympia, WA.
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Wetland Delineation and Assessment Report Johnson Single-family Home
Appendix A
Photographs
4.
rah
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(Azimuth:215`(SW)
Pitch:-72.5`(3.3`) a z
Time 03 20-202013:00 �i
Note:Johnsontpl�_
UPLAND TP1
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
RN +:
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Latitude.47.214585
Longitude:-122.973445
Elevation:55.85m
Accuracy:10.7m
Azimuth:63'(NE) y '
Pitch:-8.8'(-0.9°)
Time:03-20-202013:01
Note:Johnsontpl
r
LOOKING AT WETLAND
Latitude:47.214585
Longitude:-122.973445 -
Elevation:55.84m
Accuracy:10.7m
Azimuth:195`(S)
Pitch:-1.0`(1.9')
Time:03-20-202013:02
Note:Johnsontpl
LOOKING AT UPLAND
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
Latitude:47.21458
Longitude:-122.973445
Elevation:55.83m ..
Accuracy:10.7m
Azimuth:138'(SE)
Pitch:-5.4'(0.6')
Time:03-20-2020 13:02 ,
Note:Johnsontpl
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°Accuracy 11.871 ,
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Note:Johnsont 13'09 O
31
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
m
h )•. ,. - - � icy »( f.
Latitude.47:21474
Longitude.-122,973203
Elevation 51.12m
Accuracv:10.7m j s 'c
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lElevation.51.14m ref! �r 4' w� a
OAccuracv:11.8m ; s/
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.Pitch:-30 6'(3.4 )
-Time:03 20-2020 13:C? o.` j►° r �R
,Note:Johnsont ,. ♦' r , s,y
32
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
,. . of �rY., �� >Ae .. ,. ♦;r
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Latitude:47.214754 4
t ongitude: 122973148 , ' �4
'Elevation 51.92m
lAccuracy:17.2m
Azimuth.19`(N)
.Pitch: 28.6'(1.6°)
03, 0- 11 13.10
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Accuracy:3100.Om *R,, ;!' $ .r�. r" } j,". 4kL
Azimuth 316"(NW)
Pitch:-57.7`(-4.7°)
Time 03 20-2020 13 11 ♦
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Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
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Accuracy:11.8m
Azimuth:319•(NW)
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Time 03 20 2020 13 18 T "„y ' 5'�. 1 �1 +s AS
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LOOKING TO THE WEST
34
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
Appendix B
U.S. Fish and Wildlife Service
NWI MAP
36
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
N
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Parcei#220165500006 and 220185500007
7
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
Appendix C
Mason County NRCS
Soil Survey Map
38
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
Sod Map—MB Count%Washinglon ;<
(AppenMx C-Mason Courdy Soil Survey Map)
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39
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
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40
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
SO Map—Mason County,Washington Appendix C-Mason County Solt
Survey Map
Map Unit Legend
bol pap Unit Name Actrs ih AW Map Unit Sy n --o Unit" L0 5 1
! Pw,.t o1 A01
Alderwvcd gravelly saWy
loam.8tot5percentelopes
i
Ab -- 436
l9d — Bellingham sift loam.0 to 3 5.0 20,994
!, prmcenr slopes
Kb kilsap sift loam,5 to 15 2,2 1.7%
percent slopes
Totals for MYIA of Rner►st 2tL8 100%
i ttrk Natural Resources Web Soil Survey W771 020
CortservationService National CooperabveSNISurvey Paye3at3
41
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
APPENDIX D
USGS 7.5 MINUTE TOPOGRAPHIC MAP
42
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
■
•
r
x
f
•
RE ■•■,; r
■
Subject Property M
i
Land Services NW LLC Appendix D
120 State Axenue NE#190 Parcel#2201855000016 and 220185500007 0 80 160 320 Feet
Olympia,WA 98501
(360l481408
4)
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
Appendix E
Wetland Data Sheets
45
Land Services Northwest June 18,2020
WETLAND DETERMINATION DATA FORM-Western Mountains, Valleys, and Coast Region
Project/Site: Johnson SFR City/County: Shelton/Mason Sampling Date: 3/20/2020
Applicant/Owner: Bryan Johnson State: WA Sampling Point: TP1
Investigator(s): Alex Callender Section,Township, Range: 18/20N/2W
Landform(hillslope,terrace,etc.): Hillslope Local relief(concave,convex, none): Convex Slope(%):
Subregion(LRR): 2 Lat: Long: Datum: WGS 84
Soil Map Unit Name: Alderwood NWI classification: None
Are climatic/hydrologic conditions on the site typical for this time of year? Yes x No _ (If no,explain in Remarks.)
Are Vegetation , Soil _ ,or Hydrology _ significantly disturbed? Are"Normal Circumstances"present? Yes X No
Are Vegetation , Soil _ ,or Hydrology _ naturally problematic? (If needed,explain any answers in Remarks.)
SUMMARY OF FINDINGS-Attach site map showinq sampling oint locations, transects, important features, etc.
Hydrophytic Vegetation Present? Yes x No
Hydric Soil Present? Yes No x Is the Sampled Area within a Wetland? Yes No x
Wetland Hydrology Present? Yes No x
Remarks: No hydrology found. Or Indicators of hydrology Reference Upland Soil conditions
VEGETATION - Use scientific names of plants.
Absolute Dominant Indicator Dominance Test worksheet:
Tree Stratum (Plot size: ) %Cover Species? Status Number of Dominant Species
1. That Are OBL, FACW,or FAC: 1 (A)
2, Total Number of Dominant
3.
Species Across All Strata: 1 (B)
4 Percent of Dominant Species
That Are OBL, FACW,or FAC: 100 (A/B)
=Total Cover
Sapling/Shrub Stratum (Plot size: ) Prevalence Index worksheet:
1. Total%Cover of: Multiply by:
2. OBL species x 1 =
3. FACW species x 2=
4. FAC species x 3=
5. FACU species x 4=
=Total Cover UPL species x 5=
Herb Stratum (Plot size: ) Column Totals: (A) (B)
1. Festuca rubra 95 Yes FAC
2. Rubus ursinus 2 No FAC Prevalence Index =B/A=
3.
4 Hydrophytic Vegetation Indicators:
5. _ 1 - Rapid Test for Hydrophytic Vegetation
6. 1 x 2-Dominance Test is>50%
7. _ 3-Prevalence Index is:53.0'
8. 4-Morphological Adaptations' (Provide supporting
9 _ data in Remarks or on a separate sheet)
10 _ 5-Wetland Non-Vascular Plants'
11 _ Problematic Hydrophytic Vegetation' (Explain)
70 =Total Cover 'Indicators of hydric soil and wetland hydrology must
Woody Vine Stratum (Plot size: ) be present,unless disturbed or problematic.
1.
2.
=Total Cover Hydrophytic
Vegetation
%Bare Ground in Herb Stratum Present? Yes X No
Above slope break
US Army Corps of Engineers Western Mountains,Valleys,and Coast—Version 2.0
SOIL Sampling Point: t 1
Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.)
Depth Matrix Redox Features
(inches) Color(moist) % Color(moist) % Type' Loc' Texture Remarks
0-18 10yr316 100 C M Silt loam
'Type: C=Concentration, D=Depletion, RM=Reduced Matrix,CS=Covered or Coated Sand Grains. 'Location: PL=Pore Lining, M=Matrix.
Hydric Soil Indicators: (Applicable to all LRRs,unless otherwise noted.) Indicators for Problematic Hydric Soils':
Histosol(Al) _ Sandy Redox(S5) _ 2 cm Muck(A10)
Histic Epipedon(A2) Stripped Matrix(S6) Red Parent Material (TF2)
Black Histic(A3) Loamy Mucky Mineral(F1) (except MLRA 1) Very Shallow Dark Surface(TF12)
Hydrogen Sulfide(A4) _ Loamy Gleyed Matrix(F2) _ Other(Explain in Remarks)
Depleted Below Dark Surface(Al 1) Depleted Matrix(F3)
Thick Dark Surface(All 2) Redox Dark Surface(F6) 'Indicators of hydrophytic vegetation and
Sandy Mucky Mineral(S1) _ Depleted Dark Surface(F7) wetland hydrology must be present,
Sandy Gleyed Matrix(S4) Redox Depressions(F8) unless disturbed or problematic
Restrictive Layer(if present):
Type: Hydric Soil Present? Yes No x
Depth(inches):
No Hydric Soil indicator found
HYDROLOGY
Wetland Hydrology Indicators:
Primary Indicators(minimum of one required;check all that apply) Secondary Indicators(2 or more required)
Water-Stained Leaves(69)(except Water-Stained Leaves(139) (MLRA 1,2,
Surface Water(Al) _ MLRA 1,2,4A,and 46) _ 4A,and 46)
High Water Table(A2) _ Salt Crust(1311) _ Drainage Patterns(1310)
Saturation(A3) _ Aquatic Invertebrates(1313) _ Dry-Season Water Table(C2)
Water Marks(61) _ Hydrogen Sulfide Odor(Cl) _ Saturation Visible on Aerial Imagery(C9)
Oxidized Rhizospheres along Living
Sediment Deposits(132) _ Roots(C3) _ Geomorphic Position(D2)
Drift Deposits(63) _ Presence of Reduced Iron(C4) _ Shallow Aquitard (D3)
Recent Iron Reduction in Tilled
Algal Mat or Crust(134) Soils(C6) _ FAC-Neutral Test(D5)
Stunted or Stressed Plants(D1)
Iron Deposits(65) _ (LRR A) _ Raised Ant Mounds(D6) (LRR A)
Surface Soil Cracks(136) _ Other(Explain in Remarks) _ Frost-Heave Hummocks(D7)
_ Inundation Visible on Aerial Imagery(137)
Sparsely Vegetated Concave Surface(68)
Field Observations:
Surface Water Present? Yes _ No X Depth(inches):
Water Table Present? Yes _ No X Depth(inches): Wetland Hydrology Present? Yes No x
Saturation Present?
(includes capillary fringe) Yes _ No x Depth(inches):
Describe Recorded Data(stream gauge,monitoring well,aerial photos, previous inspections),if available: hydro at 14
NO HYDRO Dug 18 inches after period of rain. No hydro.
US Army Corps of Engineers Western Mountains,Valleys,and Coast—Version 2.0
WETLAND DETERMINATION DATA FORM-Western Mountains, Valleys, and Coast Region
Project/Site: Johnson SFR City/County: Shelton/Mason Sampling Date: 3/20/2020
Applicant/Owner: Bryan Johnson State: WA Sampling Point: TP2
Investigator(s): Alex Callender Section,Township, Range: 18/20N/2W
Landform(hillslope,terrace,etc.): Hillslope Local relief(concave,convex, none): Convex Slope(%):
Subregion(LRR): 2 Lat: Long: Datum: WGS 84
Soil Map Unit Name: Alderwood NWI classification: None
Are climatic/hydrologic conditions on the site typical for this time of year? Yes x No _ (If no,explain in Remarks.)
Are Vegetation ,Soil _ ,or Hydrology _ significantly disturbed? Are"Normal Circumstances"present? Yes X No
Are Vegetation ,Soil _ ,or Hydrology _ naturally problematic? (If needed,explain any answers in Remarks.)
SUMMARY OF FINDINGS-Attach site map Showing sampling oint locations, transects, important features, etc.
Hydrophytic Vegetation Present? Yes x No
Hydric Soil Present? Yes x No Is the Sampled Area within a Wetland? Yes No x
Wetland Hydrology Present? Yes x No
Remarks: No hydrology found.Or Indicators of hydrology Reference Upland Soil conditions
VEGETATION- Use scientific names of plants.
Absolute Dominant Indicator Dominance Test worksheet:
Tree Stratum (Plot size: ) %Cover Species? Status Number of Dominant Species
1. That Are OBL, FACW,or FAC: 3 (A)
2, Total Number of Dominant
3.
Species Across All Strata: 3 (B)
4 Percent of Dominant Species
That Are OBL, FACW,or FAC: 100 (A/B)
=Total Cover
Sapling/Shrub Stratum (Plot size: ) Prevalence Index worksheet:
1. Rubus ameniacus 10 Yes FAC Total%Cover of: Multiply by:
2. OBL species x 1 =
3. FACW species x 2=
4. FAC species x 3=
5. FACU species x 4=
=Total Cover UPL species x 5=
Herb Stratum (Plot size: ) Y
Column Totals: (A) (B)
1. Festuca rubra 2 Yes FAC
Prevalence Index = B/A=
2. Phalaris arundanacea 25 Yes FAC
3. Blachnum spicant 10 No FAC
Hydrophytic Vegetation Indicators:
4. Holcus lanatus 50 Yes FAC
_ 1 -Rapid Test for Hydrophytic Vegetation
5 x 2-Dominance Test is>50%
6. I
3-Prevalence Index is:53.0'
7.
4-Morphological Adaptations' (Provide supporting
8. _ data in Remarks or on a separate sheet)
9. _ 5-Wetland Non-Vascular Plants'
10. _ Problematic Hydrophytic Vegetation' (Explain)
11.
Indicators of hydric soil and wetland hydrology must
57 =Total Cover be present,unless disturbed or problematic.
Woody Vine Stratum (Plot size: )
1.
2. Hydrophytic
=Total Cover Vegetation
Present? Yes X No
%Bare Ground in Herb Stratum
Above slope break
US Army Corps of Engineers Western Mountains,Valleys,and Coast—Version 2.0
SOIL Sampling Point: t 2
Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.)
Depth Matrix Redox Features
(inches) Color(moist) % Color(moist) % Type' Loc' Texture Remarks
0-2 10yr3/2 100 C M Silt loam
2-8 10YR 4/2 98 10YR 4/6 2 C M Silt loam
8-18 10 YR 4/2 90 10YR 4/6 10 C M Silt loam
'Type: C=Concentration, D=Depletion, RM=Reduced Matrix,CS=Covered or Coated Sand Grains. 'Location: PL=Pore Lining,M=Matrix.
Hydric Soil Indicators: (Applicable to all LRRs,unless otherwise noted.) Indicators for Problematic Hydric Soils3:
Histosol(Al) Sandy Redox(S5) _ 2 cm Muck(A10)
Histic Epipedon(A2) _ Stripped Matrix(S6) Red Parent Material(TF2)
Black Histic(A3) _ Loamy Mucky Mineral(F1)(except MLRA 1) Very Shallow Dark Surface(TF12)
Hydrogen Sulfide(A4) Loamy Gleyed Matrix(F2) _ Other(Explain in Remarks)
Depleted Below Dark Surface(Al 1) x Depleted Matrix(F3)
Thick Dark Surface(Al 2) Redox Dark Surface(F6) 'Indicators of hydrophytic vegetation and
Sandy Mucky Mineral(S1) Depleted Dark Surface(F7) wetland hydrology must be present,
Sandy Gleyed Matrix(S4) Redox Depressions(F8) unless disturbed or problematic
Restrictive Layer(if present):
Type: Hydric Soil Present? Yes x No
Depth(inches):
F3 Hydric Soil indicator found
HYDROLOGY
Wetland Hydrology Indicators:
Primary Indicators(minimum of one required;check all that apply) Secondary Indicators(2 or more required)
Water-Stained Leaves(B9) (except Water-Stained Leaves(69)(MLRA 1,2,
Surface Water(Al) MLRA 1,2,4A,and 413) 4A,and 46)
High Water Table(A2) Salt Crust(1311) _ Drainage Patterns(1310)
Saturation(A3) _ Aquatic Invertebrates(1313) _ Dry-Season Water Table(C2)
Water Marks(61) _ Hydrogen Sulfide Odor(Cl) _ Saturation Visible on Aerial Imagery(C9)
Oxidized Rhizospheres along Living
Sediment Deposits(132) _ Roots(C3) _ Geomorphic Position(D2)
Drift Deposits(133) _ Presence of Reduced Iron(C4) _ Shallow Aquitard(D3)
Recent Iron Reduction in Tilled
Algal Mat or Crust(134) _ Soils(C6) _ FAC-Neutral Test(D5)
Stunted or Stressed Plants(D1)
Iron Deposits(135) (LRR A) Raised Ant Mounds(D6) (LRR A)
Surface Soil Cracks(B6) _ Other(Explain in Remarks) _ Frost-Heave Hummocks(D7)
Inundation Visible on Aerial Imagery(B7)
Sparsely Vegetated Concave Surface(138)
Field Observations:
Surface Water Present? Yes _ No X Depth(inches):
Water Table Present? Yes x No _ Depth(inches): 8 Wetland Hydrology Present? Yes x No
Saturation Present?
(includes capillary fringe) Yes x No Depth(inches): 7
Describe Recorded Data (stream gauge, monitoring well,aerial photos, previous inspections), if available:
Hydro at 8 inches
US Army Corps of Engineers Western Mountains,Valleys,and Coast—Version 2.0
WETLAND DETERMINATION DATA FORM-Western Mountains, Valleys, and Coast Region
Project/Site: Johnson SFR City/County: Shelton/Mason Sampling Date: 3/20/2020
Applicant/Owner: Bryan Johnson State: WA Sampling Point: TP3
Investigator(s): Alex Callender Section,Township, Range: 18/20N/2W
Landform(hillslope,terrace,etc.): Hillslope Local relief(concave,convex,none): Convex Slope(%):
Subregion(LRR): 2 Lat: Long: Datum: WGS 84
Soil Map Unit Name: Alderwood NWI classification: None
Are climatic/hydrologic conditions on the site typical for this time of year? Yes x No _ (If no,explain in Remarks.)
Are Vegetation ,Soil _ ,or Hydrology _ significantly disturbed? Are"Normal Circumstances"present? Yes X No
Are Vegetation ,Soil _ ,or Hydrology _ naturally problematic? (If needed,explain any answers in Remarks.)
SUMMARY OF FINDINGS-Attach site map showinq sampling oint locations, transects, important features, etc.
Hydrophytic Vegetation Present? Yes x No
Hydric Soil Present? Yes x No Is the Sampled Area within a Wetland? Yes No x
Wetland Hydrology Present? Yes x No
Remarks: No hydrology found. Or Indicators of hydrology Reference Upland Soil conditions
VEGETATION - Use scientific names of plants.
Absolute Dominant Indicator Dominance Test worksheet:
Tree Stratum (Plot size: ) %Cover Species? Status Number of Dominant Species
1, That Are OBL, FACW,or FAC: 3 (A)
2. Total Number of Dominant
3.
Species Across All Strata: 3 (B)
4 Percent of Dominant Species
That Are OBL, FACW,or FAC: 100 (A/B)
=Total Cover
Sapling/Shrub Stratum (Plot size: ) Prevalence Index worksheet:
1. Rubus ameniacus 10 Yes FAC Total%Cover of: Multiply by:
2. OBL species x 1 =
3. FACW species x 2=
4. FAC species x 3=
5. FACU species x 4=
=Total Cover UPL species x 5=
Herb Stratum (Plot size: ) Y Column Totals: (A) (B)
1. Festuca rubra 2 Yes FAC
Prevalence Index = B/A=
2. Phalaris arundanacea 10 Yes FAC
3. Festuca rubra 25 Yes FAC
Hydrophytic Vegetation Indicators:
4. Holcus lanatus 50 Yes FAC
1 -Rapid Test for Hydrophytic Vegetation
5.
x 2-Dominance Test is>50%
6. I
3-Prevalence Index is:53.0'
7.
4-Morphological Adaptations' (Provide supporting
B. _ data in Remarks or on a separate sheet)
9. _ 5-Wetland Non-Vascular Plants'
10. _ Problematic Hydrophytic Vegetation' (Explain)
11.
Indicators of hydric soil and wetland hydrology must
57 =Total Cover be present, unless disturbed or problematic.
Woody Vine Stratum (Plot size: )
1.
2. Hydrophytic
=Total Cover Vegetation
Present? Yes X No
%Bare Ground in Herb Stratum
Above slope break
US Army Corps of Engineers Western Mountains,Valleys,and Coast—Version 2.0
SOIL Sampling Point: t 3
Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.)
Depth Matrix Redox Features
(inches) Color(moist) % Color(moist) % Type' Loc' Texture Remarks
0-2 10yr3/2 100 C M Silt loam
2-14 10YR 4/3 100 C M Silt loam
14-18 10 YR 4/2 90 10YR 4/6 10 C M Silt loam
'Type: C=Concentration, D=Depletion, RM=Reduced Matrix,CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix.
Hydric Soil Indicators: (Applicable to all LRRs,unless otherwise noted.) Indicators for Problematic Hydric Soils':
Histosol(Al) _ Sandy Redox(S5) 2 cm Muck(A10)
Histic Epipedon(A2) Stripped Matrix(S6) _ Red Parent Material(TF2)
Black Histic(A3) _ Loamy Mucky Mineral(F1) (except MLRA 1) _ Very Shallow Dark Surface(TF12)
Hydrogen Sulfide(A4) _ Loamy Gleyed Matrix(172) Other(Explain in Remarks)
Depleted Below Dark Surface(Al 1) Depleted Matrix(F3)
Thick Dark Surface(Al 2) Redox Dark Surface(F6) 3Indicators of hydrophytic vegetation and
Sandy Mucky Mineral(S1) Depleted Dark Surface(F7) wetland hydrology must be present,
Sandy Gleyed Matrix(S4) Redox Depressions(F8) unless disturbed or problematic
Restrictive Layer(if present):
Type: Hydric Soil Present? Yes No x
Depth(inches):
No Hydric Soil indicator found
HYDROLOGY
Wetland Hydrology Indicators:
Primary Indicators(minimum of one required;check all that apply) Secondary Indicators(2 or more required)
Water-Stained Leaves(139)(except Water-Stained Leaves(139) (MLRA 1,2,
Surface Water(Al) _ MLRA 1,2,4A,and 4B) _ 4A,and 4B)
High Water Table(A2) _ Salt Crust(1311) _ Drainage Patterns(1310)
Saturation(A3) _ Aquatic Invertebrates(1313) _ Dry-Season Water Table(C2)
Water Marks(131) _ Hydrogen Sulfide Odor(Cl) _ Saturation Visible on Aerial Imagery(C9)
Oxidized Rhizospheres along Living
Sediment Deposits(132) _ Roots(C3) _ Geomorphic Position(D2)
Drift Deposits(133) _ Presence of Reduced Iron(C4) _ Shallow Aquitard (D3)
Recent Iron Reduction in Tilled
Algal Mat or Crust(134) Soils(C6) FAC-Neutral Test(D5)
Stunted or Stressed Plants(D1)
Iron Deposits(135) _ (LRR A) _ Raised Ant Mounds(D6) (LRR A)
Surface Soil Cracks(136) _ Other(Explain in Remarks) _ Frost-Heave Hummocks(D7)
Inundation Visible on Aerial Imagery(137)
Sparsely Vegetated Concave Surface(138)
Field Observations:
Surface Water Present? Yes _ No X Depth(inches):
Water Table Present? Yes _ No x Depth(inches): 14 Wetland Hydrology Present? Yes No x
Saturation Present?
(includes capillary fringe) Yes _ No x Depth(inches): 13
Describe Recorded Data (stream gauge,monitoring well,aerial photos,previous inspections),if available: hydro at 14
NO HYDRO Dug 18 inches after period of rain. Hydro at 14 too deep.
US Army Corps of Engineers Western Mountains,Valleys,and Coast-Version 2.0
Wetland Delineation and Assessment Report Johnson Single-family Home
Appendix F
WADNR Wetland and Stream Shapefiles
46
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
I
m ..
Legend ,
wchvdro
wbhydro
Parcels_A selection
Street—Centerlines
Land Services NVV LLC Appendix F
120 State Aaenue NE#190 DNR Waterbodies and Streams
Olympia,WA 98501 Parcel#220185500006 and 220185500007 0 62 5 125 250 Feet
(360)481-408
-17
Land Services Northwest June 18,2020
I
Wetland Delineation and Assessment Report Johnson Single-family Home
Appendix G
WDFW PHS and Salmonscape Data
49
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
Appendix G -Salmonscape
9 Kr
�s O�
w
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l 1
It �m
Ci
229 fi
t�,
a �xx
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�Timber.Pk�' O
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_ FA • .
aa1..tt''��Lwhh
Y
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U
a
m
z
4
d
E
E
m
Z
W
May 27,2020 1;9.028
0 0.05 0.1 0 2 rm
All Salmonscape Species
0 0.07 0.15 0.3 km
USGS'*O.sw"fi hr NERE.Game''sW up aa"ent O ODIC.
GESCO, USG,I, FAO. Np5. NRGAN. OwBace QN. KJ"6ar NL.
Ormarce s.wr , EVI JAM, MEn. EW Irma iNmg Kmgt. fC!
OOeiSM* Iap ODWWIT alat"O Ms uW ODmtrNrcj'
50
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
WASHINGTON DEPARTMENT OF FISH AND WILDLIFE
PRIORITY HABITATS AND SPECIES REPORT
SOURCE DATASEf PHSPlusPubi-c Query ID P200527136729
REPORT DATE 06127/20201.58
Common Na— Sse Nana Prwmy Area Aauracy 1—t stets Sens+dm Oat: Source Finay
,,*arerhPName Sour=Dataset Crtu .Tvpe stare status Rml:llion
So—Record More lidomwt1 n(URLI aKS"stag Staus ,.�sr�ry TA,
Source Date Mgml RacommendaWM
F� Iwa.si f-n esle!l�ne,» NIA NA ,,NAP. IV -: .and V1�101fe�arwir.:
NWnNetkgl5 gq;;atK nab tat ' �h gy�ons
http.1/www.eq Wa PHS Llat-
Fresh-W Foreeled/Shrub WA Actual,Habitat NA NIA N US Frah and Wldlife Service
M1MVedaMs Aquatic NWal NrA AS MOPPED R*g—
http,A WN eq.Wa PHS Listatl
Freshwater Foresled.'Shwb WA Aquatic habta+ NA WA N US Fish er,d Wldlife S
"WVv.la_ Aquetk haMtet IVA AS MAPPED P*gona
hPp fA—.ecy vn. PHS Listed
DISCLAIMER 1'Ns renwt mcwpes infonttanpn roar Ina Waenmglon Departmerd of Fah arld W�IdIAe(WpFW)ma,rrtants m a central mmpule�database It�s not en antmipl to prowde you vnlh an offiaei agency reapmse
as io d1e Irrpacls o1 your pfolect on fish atM wlpll/e. This infomubon Doty dilcm w Ira bcaliarl of Fah and wadllle Rbpu—to the best of our knowleoge.It is not a complete inventory and it is important to note that isn
and wWig.esouroea may occur m areas not cunemry wo—to WDFW bidogsts.or in areas for~mrnprelli,t surveys have not bean cmducled sne spaceic staweys arc Irequei+tly neoesssary b rule out are
Pream.ceof Priprity fnolar 6.Lassos"of Msh and wlMlite resoul'cts are eubiact to vr9ltion rauaed b/tlislurbance cMrges F season—d—ther and other fades INDFW does not recommend uslnp repons more tha,
Six m.w.nW
05/27/2020 1,58 1
51
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
WDFW Test Map
May 27.2020 1:19,042
PHS Report CNp Area POLY QTR-TWP o 4 D.13 0.9' jG m
PT C3AS MAPPED o o.z75 0.55 �.�wm
--1 TOWNSHIP 9p p brl G GDO Geo!}e.dtl[4r GeagYplb.GM6 Wa
— LN —
SECTION 06,USDA.U9GS,Atb;WU,GN,ig1<G6UR lCOY 114
52
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
Appendix H
NOAA NOW Precipitation Data
53
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
SAW020
Accumulated Precipitation - SEATTLE TACOMA INTL AP,WA s
Clickasxd drag to zoom to a shorter time interval;green black diamonds represent j
subsequent)missing values
50-
i
J
40
i
N
Od I
L 30
Y ^ I
M
0. I
a�
G
_
I
10
0�
Sep 1 \oti 1 Jan 1 Mar 1
r4D!2U19-20 accumulation —Normal —Highest(2015-1fr}
Lowest(1976-77)
Paveret}by,V
Note regarding subsequentitnissing values
1M
54
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
Appendix I
Wetland Rating System for Western Washington
ss
Land Services Northwest June 18,2020
Wetland Delineation and Assessment Report Johnson Single-family Home
APPENDIX J
ECY WETLAND RATING FORMS FOR WESTERN
WASHINGTON
56
Land Services Northwest June 18,2020