HomeMy WebLinkAboutGRD2014-00006 Storm Drainage Report - GRD Engineering / Geo-Tech Reports - 5/30/2014 Storm Drainage Report
Project Name:
LES HOYT
LARGE LOT DEVELOPMENT
SEC 31,TWP 22 N,RGE 1 W, W.M.
Assessor's Account No's: 1 223 1-4 1-00000
MASON COUNTY, WASHINGTON
Proponent.-
Les Hoyt
ECEIVED 2282A Old Belfair Highway
R Belfair, WA 98528
J
UN 0 3 2014 Ph. (360) 710-0645
426 W. CEDAR ST.
Project Engineer:
David Bannon, P.E.
Bannon Engineering, Inc.
23789 Brixton PI NW
Poulsbo, WA. 98370
Ph. (360) 598-1501
Email: bannonengl@comcast.net
May 30, 2014
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TABLE OF CONTENTS
SECTION PAGE
1.0 PROJECT LOCATION&VICINITY ....................................................... 2
2.0 PROJECT DESCRIPTION.......................................................................2
3.0 EXISTING CONDITIONS......................................................................3
4.0 DEVELOPED SITE DRAINAGE CONDITIONS...........................................3-5
5.0 DRAINAGE BASIN DESCRIPTION......................................................... 6-7
6.0 DESCRIPTION OF UPSTREAM BASINS................................................... 7
7.0 DOWNSTREAM ANALYSIS...................................................................7
8.0 SOILS REPORT...................................................................................7-8
9.0 HYDROLOGICAL ANALYSIS................................................................ 8-33
10.0 EROSION AND SEDIMENT CONTROL....................................................34
APPENDIX
APPENDIX A Soils Classification—Twiss Laboratories .......................................35-36
APPENDIX B Construction Stormwater Prevention Pollution Plan ...........................37-38
APPENDIX C State Access Permit-Highway 3 ..................... ...........................39-45
APPENDIX D Wetland Report ......................................... ............................46
Page 1
1. PROJECT LOCATION & VICINITY MAP
The site is located in the southwest quarter of Section 31, Township 22 North, Range 1 W,
south of Allyn, Washington (See Figure 1 —Vicinity Map).
ALLYN
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PROJECT AREA
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FIGURE l: VICINITY MAP
2. PROJECT DESCRIPTION
The proponent is applying for a Mason County Land Modification Permit to develop a
large lot subdivision through the Mason County land use process. The property is 41 acres
p. >
and will be divided into 6 lots, 5 at approximately 5.1 acres and one just over 15 acres. The
properties will be served with either single or shared wells, individual septic systems and a
shared ingress and egress off Highway 3, approximately a quarter mile south of Hardings
Hill Road in Allyn.
3. EXISTING CONDITIONS
The site consists of upland forest comprised of Douglas fir and understory salal, evergreen
huckleberry, Oregon grape and swordfern along with some scattered clearings. There is a
large wetland system along the east property line that measures 12 acres within the
property and continues east off the property. There is a second small wetland system along
the south property line that measures 1,400 square feet with a small portion within the
property. The wetlands includes a variety of communities including dense patches of
willow and spirea, and forested acres dominated by young red alder with an associated
understory of salmonberry, spirea slough sedge,piggy back plant, and wild lily of the
valley. There is an existing road that enters the northwest portion of the site from the
adjacent parcel and continues easterly along the northern third of the property. Topography
with the property varies but the majority of the site slopes southeasterly down toward the
wetland system. There is a ridgeline, not far from the west property line that slopes a
portion of the northwest corner of the site towards Highway 3.
The land abutting the property includes a large lot development to the north, a small
portion of Highway 3 right-of-way on the northwest corner and undeveloped property
south,west and east.
The Mason County Soils Survey showed the site as Alderwood. Soil tests were completed
in the location of the infiltration ponds and the soils classification included very gravely
sand near the entrance and loamy sand near lot 4. Each test hole was dug 3-feet below the
proposed pond elevation with no groundwater encountered(See Figure 2 -Existing Site).
4. DEVELOPED SITE DRAINAGE CONDITIONS
The land cover from the proposed project includes and 26-foot wide access road through
and existing easement to the north, an infiltration pond and rain garden near the entrance
that will collect and treat stormwater from the high point of the road to the entrance, an
infiltration pond and rain garden near lot 4 that will collect and treat stormwater from the
highpoint of the road to the emergency turn-a-round near lot 4, and a rain garden to treat
the stormwater from the private road that will discharge to an existing wetland system
along the south property line (See Figure 3 - Proposed Improvements).
Page 3
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FIGURE 2: EXISTING TOPOGRAPHY
Page 4
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MAINTENANCE EX STING ENTRANCE,;
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RAIN GARDEN
DISCHARGE TO WETLAND
FIGURE 3: PROPOSED IMPROVEMENTS
Page 5
5. DRAINAGE BASIN DESCRIPTION
The site was analyzed as three separate drainage basins. The northern basin will collect
stormwater from the high point of the road to the entrance. The road section will include
two ditches; one to collect stormwater from the road and direct it to the stormwater
facilities near the entrance and a second to collect offsite drainage and allow it to bypass
the drainage facility. A middle basin will collect stormwater from the high point traveling
south to the stormwater facilities within lot 4. This road section will also contain two
ditches; one to direct stormwater to the drainage facility and the second to allow offsite
stormwater to bypass the system. The third basin will collect stormwater from a 10-foot
wide private driveway used to access lots 5 and 6. This road section will also include two
ditches to collect and treat stormwater while allowing offsite stormwater to bypass the
system. The stormwater will be directed to a rain garden and discharge to an existing
wetland system along the south property line(See Figure 4—Storm Drainage Basins).
Page 6
r i sd• qy., r t .< t .. ei.._. a i- r / ( �'°' a. : •y.
p� EXISTING ENTRANfJ
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TY LINES
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'BOUNDARY
I5TI•NG SINGLE FAMILY OR
D (2 PARTY) WELL , �.` � ' �r AS
f
'FOOT WELL RADIUS �"�
GARDEN
FILTRATION POND
•' �{ �" �Jy'y DESIGN CRITERIA
T� & �� ���"�'�� FOR STORMWATER CALCULATIONS
- / BASIN A = 0.70 ACRES
RIVATE DRIVE
USDA SOIL CLASSIFICATION - GRAVELLY SAND
�. EXIS" 10 '" -;-------t'-- - DESIGN INFILTRATION RATE = 20 IN/HR
60 BUFFER -
WETLAND 'j� %�� BASIN B = 0.45 ACRES
BOUNDARY —-=� B ® - USDA SOIL CLASSIFICATION - LOAMY SAND
- DESIGN INFILTRATION RATE = 4.0 IN/HR
t �" 120PE ,�Y LINES
�c'r ;( T"� 1 = ' — BASIN B = 0.17 ACRES
USDA SOIL CLASSIFICATION - LOAMY SAND
` AIN GAR�SEN { � ® - DESIGN INFILTRATION RATE = 4.0 IN/HR
FIGURE 4: STORM DRAINAGE BASINS
Page 7
6. DESCRIPTION OF UPSTREAM BASINS
There are no upstream drainage basins to this parcel. The parcel has a ridgeline near the
northwest corner of the property that directs stormwater west and east. The road system is
designed to collect existing stormwater and discharge it to its current drainage system;
bypassing the stormwater facilities.
7. DOWNSTREAM ANALYSIS
Stormwater from the developed areas will be directed to infiltration ponds designed to
infiltrate 100%of the developed stormwater. Stormwater from the developed private
driveway area will travel through a rain garden and directed to an existing wetland along
the south property line. The developed area within the private road is small so a lot of the
stormwater will infiltrate within the rain garden and outlet ditch prior to reaching the
wetland system. (See Figure 4 -USGS Map).
ALLYN
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PROJECT AREA
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FIGURE 4: USGS MAP
8. SOILS REPORT
Three soil samples were taken to Twiss Laboratories in Poulsbo to determine the USDA
soil classifications and infiltration rates. The results of these tests classified the soils as
very gravelly sand near the entrance and loamy sand within lot 4. Based on the infiltrations
Page 8
rates show in Table 1, the design infiltration rates used for modeling are 20 inches/hour& 4
inches/hour. For long term infiltration rates in sizing the infiltration ponds, a safety factor
was applied to cut the infiltration rates in half.
Table 1
INFILTRATION RATES BASED ON USDA SOIL CLASSIFICATION
Table 5-4 SOIL INFILTRATION1 ON '
SOIL TEXTURE CLASS INEILTRATION RATE
1. Gravel coarse sand 1 min/inch
2. Sand 5 min/inch
3. Loamy sand 15 min/inch
4. Sand loam 30 min/inch
5. Loam Unsuitable
9. HYDROLOGIC ANALYSIS
Runoff computations utilized the Department of Ecology Western Washington Hydrology
Model, 2012. Design parameters were as follows:
1. Area Mitigated— Developed impervious areas, ditch areas and stormwater
facilities.
2. Water Quality Mitigation—Water quality mitigation will be through the
construction of rain gardens design to pass 91% of the developed stormwater per
the DOE stormwater manual.
3. Water Quantity Mitigation— Water quantity mitigation will be through infiltration
ponds designed to infiltration 100% of the developed stormwater flows.
Page 9
WWHM2012
PROJECT REPORT
Project Name: Les Hoyt Large Lot
Site Name: Hoyt Large Lot
Site Address:
City Allyn, WA
Report Date: 5/30/2014
Gage : Olympia
Data Start : 1955/10/01
Data End : 2008/09/30
Precip Scale: 1.11
Version : 2013/06/26
Low Flow Threshold for POC 1 : 50 Percent of the 2 Year
High Flow Threshold for POC 1: 50 year
Low Flow Threshold for POC 2 : 50 Percent of the 2 Year
High Flow Threshold for POC 2: 50 year
Low Flow Threshold for POC 3 : 50 Percent of the 2 Year
High Flow Threshold for POC 3: 50 year
PREDEVELOPED LAND USE
Name : Entrance Storm Drainage
Bypass: No
Groundwater: No
Pervious Land Use Acres
A B, Forest, Steep .7
Pervious Total 0.7
Impervious Land Use Acres
Impervious Total 0
Basin Total 0.7
Element Flows To:
Surface Interflow Groundwater
Page 1
i
Name Middle Storm Drainage
Bypass: No
Groundwater: No
Pervious Land Use Acres
A B, Forest, Steep .45
Pervious Total 0.45
Impervious Land Use Acres
Impervious Total 0
Basin Total 0.45
Element Flows To:
Surface Interflow Groundwater
Name Private Road Storm Drainage
Bypass: No
Groundwater: No
Pervious Land Use Acres
A B, Forest, Steep .17
Pervious Total 0.17
Impervious Land Use Acres
Impervious Total 0
Basin Total 0.17
Element Flows To:
Surface Interflow Groundwater
MITIGATED LAND USE
Name : Basin 1
Bypass: No
Groundwater: No
Pervious Land Use Acres
Pervious Total 0
Impervious Land Use Acres
i
ROADS MOD 0.7
Impervious Total 0.7
Basin Total 0.7
Element Flows To:
Surface Interflow Groundwater
Surface Surface
Name Rain Garden (Near Entrance)
Bottom Length: 35.00 ft.
Bottom Width: 15.00 ft.
Material thickness of first layer: 1.5
Material type for first layer: SMMWW
Material thickness of second layer: 1
Material type for second layer: GRAVEL
Material thickness of third layer: 0
Material type for third layer: GRAVEL
Infiltration On
Infiltration rate: 20
Infiltration safety factor: 1
Underdrain used
Underdrain Diameter (ft) : 0.5
Orifice Diameter (in) : 0.5
Offset (in) : 8
Flow Through Underdrain (ac-ft) : 218.38
Total Outflow (ac-ft) : 1324 .388
Percent Through Underdrain: 16.49
Discharge Structure
Riser Height: 1 ft.
Riser Diameter: 6 in.
Element Flows To:
Outlet 1 Outlet 2
Trapezoidal Pond 1
Hydraulic Table
Stage(ft) Area(ac) Volume(ac-ft) Discharge(cfs) Infilt(cfs)
0. 0000 0. 0344 0. 0000 0. 0000 0.0000
0.0495 0.0341 0.0005 0.0000 0.0000
0.0989 0.0336 0.0010 0.0000 0.0000
0.1484 0.0331 0.0015 0.0000 0.0000
0.1978 0.0325 0.0020 0.0001 0.0001
0.2473 0.0320 0.0025 0.0002 0.0002
0.2967 0.0315 0.0031 0.0002 0.0002
0.3462 0.0309 0.0036 0.0004 0.0004
0.3956 0.0304 0.0042 0.0005 0.0005
0.4451 0.0299 0.0048 0.0007 0.0007
0.4945 0.0294 0.0054 0.0008 0.0008
0.5440 0.0289 0.0060 0.0011 0.0011
0.5934 0.0284 0.0066 0.0013 0.0013
0. 6429 0.0279 0.0073 0.0016 0.0016
0.6923 0.0274 0.0079 0.0019 0.0019
0.7418 0.0269 0.0086 0.0023 0.0023
0.7912 0.0264 0.0093 0.0027 0.0027
Page 12
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3.4396 0.0455 0.0704 0.0000 0.1186 0.2431
3.4890 0.0461 0.0727 0.0000 0.1210 0.2431
3.5385 0.0468 0.0750 0.0000 0.1234 0.2431
3.5879 0.0474 0.0773 0.0000 0. 1258 0.2431
3.6374 0.0480 0.0797 0.0000 0. 1282 0.2431
3.6868 0.0487 0.0821 0.0000 0. 1306 0.2431
3.7363 0.0493 0.0845 0.0000 0.1330 0.2431
3.7857 0.0500 0.0869 0.0000 0. 1354 0.2431
3.8352 0.0506 0.0894 0.0000 0. 1378 0.2431
3.8846 0.0513 0.0919 0.0000 0.1402 0.2431
3.9341 0.0519 0.0945 0.0001 0.1426 0.2431
3.9835 0.0526 0.0971 0.0001 0.1450 0.2431
4 .0330 0.0533 0.0997 0.0001 0.1474 0.2431
4 .0824 0.0539 0.1024 0.0001 0.1498 0.2431
4. 1319 0.0546 0.1050 0.0002 0.1522 0.2431
4 .1813 0.0553 0.1078 0.0002 0.1546 0.2431
4.2308 0.0560 0.1105 0.0002 0.1571 0.2431
4.2802 0.0567 0.1133 0.0002 0. 1595 0.2431
4.3297 0.0574 0.1161 0.0003 0.1619 0.2431
4.3791 0.0581 0.1190 0.0003 0.1643 0.2431
4 .4286 0.0588 0.1219 0.0004 0.1667 0.2431
4.4780 0.0595 0.1248 0.0004 0.1691 0.2431
4 .5000 0.0598 0.1261 0.0004 0.1701 0.0000
Name Surface
Element Flows To:
Outlet 1 Outlet 2
Trapezoidal Pond 1
Name : Basin 2
Bypass: No
Groundwater: No
Pervious Land Use Acres
Pervious Total 0
Impervious Land Use Acres
ROADS MOD 0.45
Impervious Total 0.45
Basin Total 0.45
Element Flows To:
Surface Interflow Groundwater
Surface Surface
Page 14
Name Trapezoidal Pond 1 (Near Entrance)
Bottom Length: 44 .06 ft.
Bottom Width: 14 . 69 ft.
Depth: 5 ft .
Volume at riser head: 0. 1452 acre-ft.
Infiltration On
Infiltration rate: 20
Infiltration safety factor: 0.5
Side slope 1: 3 To 1
Side slope 2: 3 To 1
Side slope 3: 3 To 1
Side slope 4: 3 To 1
Element Flows To:
Outlet 1 Outlet 2
Pond Hydraulic Table
Stage(ft) Area(ac) Volume(ac-ft) Discharge(cfs) Infilt(cfs)
0. 0000 0.014 0.000 0. 000 0.000
0.0556 0.015 0.000 0.000 0. 149
0. 1111 0.015 0.001 0.000 0. 149
0. 1667 0. 016 0.002 0.000 0. 149
0.2222 0. 016 0.003 0.000 0. 149
0.2778 0.017 0.004 0.000 0. 149
0.3333 0.017 0.005 0. 000 0. 149
0. 3889 0.018 0.006 0. 000 0. 149
0. 4444 0.018 0.007 0.000 0. 149
0.5000 0.019 0.008 0.000 0.149
0.5556 0.019 0.009 0.000 0. 149
0. 6111 0.020 0. 010 0.000 0. 149
0. 6667 0.020 0.011 0.000 0. 149
0.7222 0. 021 0.012 0.000 0. 149
0.7778 0.021 0.014 0.000 0. 149
0.8333 0.022 0.015 0.000 0. 149
0. 8889 0.022 0.016 0. 000 0. 149
0. 9444 0.023 0.017 0.000 0.149
1.0000 0.023 0.019 0.000 0.149
1.0556 0.024 0.020 0.000 0. 149
1. 1111 0. 024 0.021 0.000 0. 149
1 . 1667 0.025 0.023 0.000 0. 149
1.2222 0.026 0.024 0. 000 0. 149
1.2778 0.026 0.026 0. 000 0. 149
1.3333 0.027 0. 027 0.000 0. 149
1.3889 0.027 0. 029 0.000 0. 149
1.4444 0.028 0.030 0.000 0. 149
1.5000 0. 028 0.032 0.000 0. 149
1.5556 0.029 0.033 0.000 0. 149
1. 6111 0. 030 0. 035 0.000 0. 149
1. 6667 0. 030 0.037 0.000 0. 149
1. 7222 0. 031 0.039 0.000 0. 149
1.7778 0.031 0.040 0.000 0. 149
1. 8333 0.032 0.042 0.000 0.149
1.8889 0.033 0.044 0.000 0. 149
1. 9444 0.033 0.046 0.000 0. 149
2.0000 0.034 0.048 0.000 0. 149
Page 15
2.0556 0.035 0.050 0.000 0.149
2. 1111 0.035 0.052 0.000 0.149
2. 1667 0.036 0.054 0.000 0.149
2.2222 0.036 0.056 0.000 0.149
2.2778 0.037 0.058 0.000 0.149
2.3333 0.038 0.060 0.000 0.149
2.3889 0.038 0.062 0.000 0.149
2.4444 0.039 0.064 0.000 0.149
2.5000 0.040 0.066 0.000 0.149
2.5556 0.040 0.069 0.001 0.149
2. 6111 0.041 0.071 0.001 0.149
2.6667 0.042 0.073 0.001 0.149
2.7222 0.043 0.076 0.001 0.149
2.7778 0.043 0.078 0.001 0.149
2.8333 0.044 0.080 0.001 0.149
2.8889 0.045 0.083 0.001 0.149
2.9444 0.045 0.085 0.001 0.149
3.0000 0.046 0.088 0.001 0.149
3.0556 0.047 0.091 0.001 0.149
3.1111 0.048 0.093 0.001 0.149
3. 1667 0.048 0.096 0.002 0.149
3.2222 0.049 0.099 0.002 0.149
3.2778 0.050 0.101 0.004 0.149
3.3333 0.051 0.104 0.005 0.149
3.3889 0.051 0.107 0.006 0.149
3.4444 0.052 0.110 0.008 0.149
3.5000 0.053 0.113 0.009 0.149
3.5556 0.054 0. 116 0.011 0.149
3.6111 0.054 0.119 0.012 0.149
3. 6667 0.055 0.122 0.014 0. 149
3.7222 0.056 0. 125 0.016 0.149
3.7778 0.057 0.128 0.018 0.149
3.8333 0.058 0.131 0.019 0.149
3.8889 0.058 0.135 0.021 0.149
3. 9444 0.059 0.138 0.023 0. 149
4.0000 0.060 0. 141 0.025 0.149
4 .0556 0.061 0. 145 0.216 0.149
4 . 1111 0.062 0.148 0.566 0.149
4.1667 0.062 0.152 1.019 0.149
4.2222 0.063 0. 155 1.555 0.149
4.2778 0.064 0.159 2.164 0.149
4 .3333 0.065 0.162 2.836 0.149
4.3889 0.066 0.166 3.568 0.149
4 .4444 0.067 0. 170 4 .353 0.149
4 .5000 0.068 0. 173 5.190 0.149
4 .5556 0.068 0.177 6.074 0.149
4. 6111 0.069 0.181 7.004 0.149
4.6667 0.070 0. 185 7.977 0.149
4 .7222 0.071 0.189 8.991 0.149
4.7778 0.072 0.193 10.04 0.149
4.8333 0.073 0.197 11. 13 0. 149
4 .8889 0.074 0.201 12.26 0.149
4. 9444 0.075 0.205 13.43 0.149
5.0000 0.076 0.209 14. 63 0.149
5.0556 0.076 0.214 15.86 0.149
Page 16
i
Name Rain Garden (Near Lot 4)
Bottom Length: 20.00 ft.
Bottom Width: 10.00 ft.
Material thickness of first layer: 1.5
Material type for first layer: SMMWW
Material thickness of second layer: 1
Material type for second layer: GRAVEL
Material thickness of third layer: 0
Material type for third layer: GRAVEL
Infiltration On
Infiltration rate: 4
Infiltration safety factor: 1
Underdrain used
Underdrain Diameter (ft) : 0.5
Orifice Diameter (in) : 6
Offset (in) : 8
Flow Through Underdrain (ac-ft) : 218.38
Total Outflow (ac-ft) : 1324 .388
Percent Through Underdrain: 16.49
Element Flows To:
Outlet 1 Outlet 2
Trapezoidal Pond 2
Hydraulic Table
Stage(ft) Area(ac) Volume(ac-ft) Discharge(cfs) Infilt(cfs)
0.0000 0.0201 0.0000 0.0000 0.0000
0.0495 0.0199 0.0001 0.0000 0.0000
0.0989 0.0195 0.0002 0.0000 0.0000
0. 1484 0.0191 0.0003 0.0000 0.0000
0. 1978 0.0187 0.0004 0.0000 0.0000
0.2473 0.0183 0.0005 0.0001 0.0001
0.2967 0.0179 0.0006 0.0001 0.0001
0.3462 0.0175 0.0007 0.0001 0.0001
0.3956 0.0171 0.0008 0.0002 0.0002
0.4451 0.0167 0.0010 0.0002 0.0002
0.4945 0.0164 0.0011 0.0003 0.0003
0.5440 0.0160 0.0012 0.0004 0.0004
0.5934 0.0156 0.0014 0.0005 0.0005
0.6429 0.0153 0.0015 0.0006 0.0006
0. 6923 0.0149 0.0017 0.0007 0.0007
0.7418 0.0146 0.0018 0.0009 0.0009
0.7912 0.0142 0.0020 0.0010 0.0010
0.8407 0.0139 0.0022 0.0012 0.0012
0.8901 0.0135 0.0023 0.0014 0.0014
0. 9396 0.0132 0.0025 0.0016 0.0016
0. 9890 0.0129 0.0027 0.0018 0.0018
1.0385 0.0125 0.0029 0.0020 0.0020
1.0879 0.0122 0.0031 0.0022 0.0022
1.1374 0.0119 0.0033 0.0025 0.0025
1.1868 0.0116 0.0035 0.0028 0.0028
1.2363 0.0113 0.0037 0.0031 0.0031
1.2857 0.0110 0.0039 0.0034 0.0034
1.3352 0.0107 0.0041 0.0037 0.0037
1.3846 0.0104 0.0043 0.0006 0.0006
1.4341 0.0101 0.0046 0.0007 0.0007
Page 17
1.4835 0.0098 0.0048 0.0008 0.0008
1.5330 0.0095 0.0049 0.0009 0.0009
1.5824 0.0092 0.0051 0.0011 0.0011
1. 6319 0.0089 0.0052 0.0012 0.0012
1.6813 0.0086 0.0054 0.0014 0.0014
1.7308 0.0084 0.0055 0.0016 0.0016
1.7802 0.0081 0.0056 0.0018 0.0018
1.8297 0.0078 0.0058 0.0020 0.0020
1.8791 0.0076 0.0060 0.0022 0.0022
1. 9286 0.0073 0.0061 0.0024 0.0024
1.9780 0.0071 0.0063 0.0027 0.0027
2.0275 0.0068 0.0064 0.0030 0.0030
2.0769 0.0066 0.0066 0.0032 0.0032
2.1264 0.0064 0.0068 0.0035 0.0035
2.1758 0.0061 0.0070 0.0039 0.0039
2.2253 0.0059 0.0071 0.0041 0.0041
2.2747 0.0057 0.0073 0.0041 0.0041
2.3242 0.0054 0.0075 0.0041 0.0041
2.3736 0.0052 0.0077 0.0041 0.0041
2.4231 0.0050 0.0079 0.0041 0.0041
2.4725 0.0048 0.0081 0.0041 0.0041
2.5000 0.0046 0.0082 0.0041 0.0041
Surface Hydraulic Table
Stage(£t) Area(ac) Volume(ac-ft) Discharge(cfs) To Amended(cfs) Wetted Surface
2.5000 0.0201 0.0082 0.0000 0.0287 0.0185
2.5495 0.0205 0.0092 0.0000 0.0287 0.0185
2.5989 0.0209 0.0102 0.0000 0.0296 0.0185
2.6484 0.0213 0.0113 0.0000 0.0305 0.0185
2. 6978 0.0218 0.0124 0.0000 0.0314 0.0185
2.7473 0.0222 0.0134 0.0000 0.0324 0.0185
2.7967 0.0226 0.0146 0.0000 0.0333 0.0185
2.8462 0.0230 0.0157 0.0000 0.0342 0.0185
2.8956 0.0235 0.0168 0.0000 0.0351 0.0185
2. 9451 0.0239 0.0180 0.0000 0.0360 0.0185
2. 9945 0.0244 0.0192 0.0000 0.0369 0.0185
3.0440 0.0248 0.0204 0.0000 0.0379 0.0185
3.0934 0.0253 0.0217 0.0000 0.0388 0.0185
3.1429 0.0257 0.0229 0.0000 0.0397 0.0185
3.1923 0.0262 0.0242 0.0000 0.0406 0.0185
3.2418 0.0267 0.0255 0.0000 0.0415 0.0185
3.2912 0.0271 0.0268 0.0000 0.0424 0.0185
3.3407 0.0276 0.0282 0.0000 0.0433 0.0185
3.3901 0.0281 0.0296 0.0000 0.0443 0.0185
3.4396 0.0286 0.0310 0.0000 0.0452 0.0185
3.4890 0.0291 0.0324 0.0000 0.0461 0.0185
3.5385 0.0296 0.0338 0.0000 0.0470 0.0185
3.5879 0.0301 0.0353 0.0000 0.0479 0.0185
3.6374 0.0306 0.0368 0.0000 0.0488 0.0185
3.6868 0.0311 0.0383 0.0000 0.0498 0.0185
3.7363 0.0316 0.0399 0.0000 0.0507 0.0185
3.7857 0.0321 0.0415 0.0000 0.0516 0.0185
3.8352 0.0326 0.0431 0.0000 0.0525 0.0185
3.8846 0.0331 0.0447 0.0035 0.0534 0.0185
3. 9341 0.0336 0.0463 0.0038 0.0543 0.0185
3. 9835 0.0342 0.0480 0.0044 0.0553 0.0185
4 .0330 0.0347 0.0497 0.0052 0.0562 0.0185
Page 18
4 .0824 0. 0352 0.0514 0.0060 0.0571 0.0185
4 . 1319 0.0358 0.0532 0.0069 0.0580 0.0185
4 . 1813 0. 0363 0.0550 0.0079 0.0589 0. 0185
4 .2308 0.0369 0.0568 0. 0089 0.0598 0. 0185
4 .2802 0.0374 0. 0586 0. 0100 0.0607 0.0185
4 .3297 0.0380 0.0605 0. 0112 0.0617 0.0185
4 .3791 0.0385 0.0624 0. 0125 0.0626 0.0185
4 .4286 0.0391 0.0643 0.0139 0.0635 0.0185
4 .4780 0.0397 0.0663 0.0154 0.0644 0.0185
4 .5000 0.0399 0.0671 0.0169 0. 0648 0.0000
Name Surface
Element Flows To:
Outlet 1 Outlet 2
Trapezoidal Pond 2
Name : Trapezoidal Pond 2 (Near Lot 4)
Bottom Length: 46. 41 ft.
Bottom Width: 15. 47 ft.
Depth: 6 ft.
Volume at riser head: 0.2234 acre-ft.
Infiltration On
Infiltration rate: 4
Infiltration safety factor: 0.5
Side slope 1: 3 To 1
Side slope 2: 3 To 1
Side slope 3: 3 To 1
Side slope 4: 3 To 1
Element Flows To:
Outlet 1 Outlet 2
Pond Hydraulic Table
Stage(ft) Area(ac) Volume(ac-ft) Discharge(cfs) Infilt(cfs)
0. 0000 0.016 0.000 0.000 0.000
0. 0667 0.017 0.001 0.000 0.033
0. 1333 0. 017 0.002 0.000 0.033
0.2000 0. 018 0.003 0.000 0.033
0.2667 0.018 0.004 0.000 0.033
0.3333 0.019 0.006 0.000 0.033
0.4000 0.020 0.007 0.000 0.033
0. 4667 0.020 0.008 0.000 0.033
0.5333 0. 021 0.010 0.000 0. 033
0. 6000 0. 021 0.011 0.000 0.033
0. 6667 0.022 0.013 0. 000 0.033
0.7333 0.023 0.014 0.000 0.033
0.8000 0.023 0.016 0. 000 0.033
0. 8667 0. 024 0. 017 0. 000 0.033
0. 9333 0. 025 0. 019 0. 000 0.033
1.0000 0. 025 0.021 0. 000 0.033
1.0667 0. 026 0.022 0. 000 0.033
1. 1333 0.027 0.024 0.000 0.033
1.2000 0. 027 0.026 0.000 0.033
Page 19
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1.2667 0.028 0.028 0.000 0.033
1.3333 0.029 0.030 0.000 0.033
1.4000 0.030 0.032 0.000 0.033
1.4667 0.030 0.034 0.000 0.033
1.5333 0.031 0.036 0.000 0.033
1. 6000 0.032 0.038 0.000 0.033
1.6667 0.033 0.040 0.000 0.033
1.7333 0.033 0.042 0.000 0.033
1.8000 0.034 0.045 0.000 0.033
1.8667 0.035 0.047 0.000 0.033
1.9333 0.036 0.049 0.000 0.033
2.0000 0.036 0.052 0.000 0.033
2.0667 0.037 0.054 0.000 0.033
2.1333 0.038 0.057 0.000 0.033
2.2000 0.039 0.059 0.000 0.033
2.2667 0.040 0.062 0.000 0.033
2.3333 0.040 0.065 0.000 0.033
2.4000 0.041 0.067 0.000 0.033
2.4667 0.042 0.070 0.000 0.033
2.5333 0.043 0.073 0.000 0.033
2. 6000 0.044 0.076 0.000 0.033
2. 6667 0.045 0.079 0.000 0.033
2.7333 0.046 0.082 0.000 0.033
2.8000 0.046 0.085 0.000 0.033
2.8667 0.047 0.088 0.000 0.033
2. 9333 0.048 0.092 0.000 0.033
3.0000 0.049 0.095 0.000 0.033
3.0667 0.050 0.098 0.000 0.033
3.1333 0.051 0.102 0.000 0.033
3.2000 0.052 0. 105 0.000 0.033
3.2667 0.053 0.108 0.000 0.033
3.3333 0.054 0.112 0.000 0.033
3.4000 0.055 0.116 0.000 0.033
3.4667 0.056 0.119 0.000 0.033
3.5333 0.056 0.123 0.000 0.033
3. 6000 0.057 0.127 0.000 0.033
3.6667 0.058 0. 131 0.000 0.033
3.7333 0.059 0.135 0.000 0.033
3.8000 0.060 0.139 0.000 0.033
3.8667 0.061 0.143 0.000 0.033
3.9333 0.062 0.147 0.000 0.033
4.0000 0.063 0.151 0.000 0.033
4.0667 0.064 0.156 0.000 0.033
4 . 1333 0.065 0.160 0.000 0.033
4 .2000 0.066 0.164 0.000 0.033
4.2667 0.067 0. 169 0.000 0.033
4 .3333 0.068 0. 173 0.000 0.033
4 .4000 0.070 0.178 0.000 0.033
4.4667 0.071 0.183 0.000 0.033
4.5333 0.072 0.188 0.001 0.033
4.6000 0.073 0.192 0.002 0.033
4.6667 0.074 0.197 0.003 0.033
4.7333 0.075 0.202 0.005 0.033
4.8000 0.076 0.207 0.007 0.033
4 .8667 0.077 0.212 0.009 0.033
4. 9333 0.078 0.218 0.011 0.033
5.0000 0.079 0.223 0.013 0.033
Page 20
5.0667 0.080 0.228 0.264 0.033
5.1333 0.082 0.234 0.724 0.033
5.2000 0.083 0.239 1.320 0.033
5.2667 0.084 0.245 2.025 0.033
5.3333 0.085 0.250 2.824 0.033
5.4000 0.086 0.256 3.709 0.033
5.4667 0.087 0.262 4. 670 0.033
5.5333 0.089 0.268 5.703 0.033
5. 6000 0.090 0.274 6.802 0.033
5. 6667 0.091 0.280 7. 965 0.033
5.7333 0.092 0.286 9.187 0.033
5.8000 0.093 0.292 10.46 0.033
5.8667 0.094 0.299 11.80 0.033
5. 9333 0.096 0.305 13.18 0.033
6.0000 0.097 0.311 14.62 0.033
6.0667 0.098 0.318 16. 10 0.033
Name Basin 3
Bypass: No
Groundwater: No
Pervious Land Use Acres
Pervious Total 0
Impervious Land Use Acres
ROADS MOD 0.17
Impervious Total 0.17
Basin Total 0.17
Element Flows To:
Surface Interflow Groundwater
Surface Surface
Name Rain Garden (Within Lot 6)
Bottom Length: 10.00 ft.
Bottom Width: 15.00 ft.
Material thickness of first layer: 1.5
Material type for first layer: SMMWW
Material thickness of second layer: 1
Material type for second layer: GRAVEL
Material thickness of third layer: 0
Material type for third layer: GRAVEL
Infiltration On
Infiltration rate: 4
Infiltration safety factor: 1
Underdrain used
Underdrain Diameter (ft) : 0.5
Orifice Diameter (in) : 6
Offset (in) : 8
Flow Through Underdrain (ac-ft) : 218.38
Page 21
Total Outflow (ac-ft) : 1324.388
Percent Through Underdrain: 16.49
Discharge Structure
Riser Height: 0.8 ft.
Riser Diameter: 6 in.
Element Flows To:
Outlet 1 Outlet 2
Hydraulic Table
S_tage(ft) Area(ac) Volume(ac-ft) Discharae(cfs) Infilt(cfa)
0.0000 0.0034 0.0000 0.0000 0.0000
0.0473 0.0034 0.0001 0.0000 0.0000
0.0945 0.0034 0.0003 0.0000 0.0000
0.1418 0.0034 0.0004 0.0000 0.0000
0.1890 0.0034 0.0005 0.0000 0.0000
0.2363 0.0034 0.0006 0.0000 0.0000
0.2835 0.0034 0.0008 0.0001 0.0001
0.3308 0.0034 0.0009 0.0001 0.0001
0.3780 0.0034 0.0010 0.0001 0.0001
0.4253 0.0034 0.0011 0.0002 0.0002
0.4725 0.0034 0.0013 0.0002 0.0002
0.5198 0.0034 0.0014 0.0003 0.0003
0.5670 0.0034 0.0015 0.0003 0.0003
0. 6143 0.0034 0.0017 0.0004 0.0004
0. 6615 0.0034 0.0018 0.0005 0.0005
0.7088 0.0034 0.0019 0.0006 0.0006
0.7560 0.0034 0.0020 0.0007 0.0007
0.8033 0.0034 0.0022 0.0008 0.0008
0.8505 0.0034 0.0023 0.0009 0.0009
0.8978 0.0034 0.0024 0.0010 0.0010
0. 9451 0.0034 0.0026 0.0012 0.0012
0. 9923 0.0034 0.0027 0.0013 0.0013
1.0396 0.0034 0.0028 0.0015 0.0015
1.0868 0.0034 0.0029 0.0017 0.0017
1. 1341 0.0034 0.0031 0.0019 0.0019
1.1813 0.0034 0.0032 0.0021 0.0021
1.2286 0.0034 0.0033 0.0023 0.0023
1.2758 0.0034 0.0034 0.0025 0.0025
1.3231 0.0034 0.0036 0.0027 0.0027
1.3703 0.0034 0.0037 0.0006 0.0006
1.4176 0.0034 0.0038 0.0006 0.0006
1.4648 0.0034 0.0040 0.0007 0.0007
1.5121 0.0034 0.0040 0.0008 0.0008
1.5593 0.0034 0.0041 0.0009 0.0009
1.6066 0.0034 0.0042 0.0011 0.0011
1.6538 0.0034 0.0042 0.0012 0.0012
1.7011 0.0034 0.0043 0.0014 0.0014
1.7484 0.0034 0.0044 0.0016 0.0016
1.7956 0.0034 0.0044 0.0017 0.0017
1.8429 0.0034 0.0045 0.0019 0.0019
1.8901 0.0034 0.0046 0.0021 0.0021
1.9374 0.0034 0.0046 0.0024 0.0024
1. 9846 0.0034 0.0047 0.0026 0.0026
2.0319 0.0034 0.0048 0.0028 0.0028
2.0791 0.0034 0.0048 0.0031 0.0031
Page 22
i
2.1264 0.0034 0.0049 0.0034 0.0034
2.1736 0.0034 0.0050 0.0037 0.0037
2.2209 0.0034 0.0050 0.0039 0.0039
2.2681 0.0034 0.0051 0.0039 0.0039
2.3154 0.0034 0.0052 0.0039 0.0039
2.3626 0.0034 0.0052 0.0039 0.0039
2.4099 0.0034 0.0053 0.0039 0.0039
2.4571 0.0034 0.0054 0.0039 0.0039
2.5000 0.0034 0.0054 0.0039 0.0039
Surface Hydraulic Table
Stage(ft) Area(ac) volume(ac-ft) Dischar e(cfe) To Amended(cfs) Wetted Surface
2.5000 0.0034 0.0054 0.0000 0.0215 0.0139
2.5473 0.0034 0.0056 0.0000 0.0215 0.0139
2.5945 0.0034 0.0058 0.0000 0.0221 0.0139
2. 6418 0.0034 0.0059 0.0000 0.0228 0.0139
2.6890 0.0034 0.0061 0.0000 0.0235 0.0139
2.7363 0.0034 0.0063 0.0000 0.0241 0.0139
2.7835 0.0034 0.0064 0.0000 0.0248 0.0139
2.8308 0.0034 0.0066 0.0000 0.0254 0.0139
2.8780 0.0034 0.0067 0.0000 0.0261 0.0139
2. 9253 0.0034 0.0069 0.0000 0.0267 0.0139
2. 9725 0.0034 0.0071 0.0000 0.0274 0.0139
3.0198 0.0034 0.0072 0.0000 0.0281 0.0139
3.0670 0.0034 0.0074 0.0000 0.0287 0.0139
3.1143 0.0034 0.0076 0.0000 0.0294 0.0139
3. 1615 0.0034 0.0077 0.0000 0.0300 0.0139
3.2088 0.0034 0.0079 0.0000 0.0307 0.0139
3.2560 0.0034 0.0080 0.0000 0.0313 0.0139
3.3033 0.0034 0.0082 0.0000 0.0320 0.0139
3.3505 0.0034 0.0084 0.0000 0.0326 0.0139
3.3978 0.0034 0.0085 0.0000 0.0333 0.0139
3.4451 0.0034 0.0087 0.0000 0.0340 0.0139
3.4923 0.0034 0.0089 0.0000 0.0346 0.0139
3.5396 0.0034 0.0090 0.0000 0.0353 0.0139
3.5868 0.0034 0.0092 0.0000 0.0359 0.0139
3.6341 0.0034 0.0093 0.0000 0.0366 0.0139
3.6813 0.0034 0.0095 0.0000 0.0372 0.0139
3.7286 0.0034 0.0097 0.0000 0.0379 0.0139
3.7758 0.0034 0.0098 0.0000 0.0386 0.0139
3.8231 0.0034 0.0100 0.0000 0.0392 0.0139
3.8703 0.0034 0.0102 0.0024 0.0399 0.0139
3.9176 0.0034 0.0103 0.0026 0.0405 0.0139
3. 9648 0.0034 0.0105 0.0031 0.0412 0.0139
4.0121 0.0034 0.0106 0.0036 0.0418 0.0139
4 .0593 0.0034 0.0108 0.0041 0.0425 0.0139
4. 1066 0.0034 0.0110 0.0047 0.0431 0.0139
4.1538 0.0034 0.0111 0.0054 0.0438 0.0139
4.2011 0.0034 0.0113 0.0061 0.0445 0.0139
4.2484 0.0034 0.0115 0.0068 0.0451 0.0139
4.2956 0.0034 0.0116 0.0076 0.0458 0.0139
4.3000 0.0034 0.0116 0.0085 0.0458 0.0139
Page 23
Name Surface
Element Flows To:
Outlet 1 Outlet 2
ANALYSIS RESULTS
Stream Protection Duration
Predeveloped Landuse Totals for POC #1
Total Pervious Area:0.7
Total Impervious Area:O
Mitigated Landuse Totals for POC #1
Total Pervious Area:O
Total Impervious Area:0.7
Flow Frequency Return Periods for Predeveloped. POC #1
Return Period Flow(cfs)
2 year 0.000304
5 year 0.001005
10 year 0.001778
25 year 0.003138
50 year 0.004433
100 year 0.005965
Flow Frequency Return Periods for Mitigated. POC #1
Return Period Flow(cfs)
2 year 0.000304
5 year 0.001005
10 year 0.001778
25 year 0.003138
50 year 0.004433
100 year 0.005965
Stream Protection Duration
Annual Peaks for Predeveloped and Mitigated. POC #1
Year Predeveloped Mitigated
1956 0.000 0.000
1957 0.001 0.001
1958 0.000 0.000
1959 0.000 0.000
1960 0.001 0.001
1961 0.000 0.000
1962 0.000 0.000
1963 0.001 0.001
1964 0.000 0.000
1965 0.000 0.000
1966 0.000 0.000
1967 0.000 0.000
1968 0.000 0.000
1969 0.000 0.000
1970 0.000 0.000
Page 24
1971 0. 000 0.000
1972 0.001 0.001
1973 0.000 0.000
1974 0.000 0.000
1975 0.000 0.000
1976 0.001 0.001
1977 0. 000 0.000
1978 0. 001 0.001
1979 0.000 0.000
1980 0.000 0.000
1981 0.001 0.001
1982 0.001 0.001
1983 0.001 0.001
1984 0.000 0.000
1985 0. 000 0. 000
1986 0. 001 0. 001
1987 0. 001 0. 001
1988 0. 000 0. 000
1989 0. 000 0.000
1990 0.001 0.001
1991 0.001 0.001
1992 0. 000 0.000
1993 0. 000 0.000
1994 0.000 0. 000
1995 0.001 0.001
1996 0.001 0.001
1997 0.000 0.000
1998 0.001 0.001
1999 0.000 0.000
2000 0.001 0.001
2001 0.000 0.000
2002 0. 001 0.001
2003 0.000 0. 000
2004 0.001 0.001
2005 0.000 0.000
2006 0.000 0.000
2007 0.001 0.001
2008 0.043 0.043
Stream Protection Duration
Ranked Annual Peaks for Predeveloped and Mitigated. POC #1
Rank Predeveloped Mitigated
1 0.0425 0.0425
2 0.0010 0.0010
3 0.0009 0.0009
4 0. 0009 0.0009
5 0. 0009 0. 0009
6 0.0008 0.0008
7 0.0008 0.0008
8 0.0008 0.0008
9 0. 0008 0.0008
10 0. 0008 0.0008
11 0.0007 0.0007
12 0.0007 0.0007
13 0.0007 0.0007
14 0.0007 0.0007
Page 25
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0.0030 112 11 9 Pass
0.0030 112 11 9 Pass
0.0031 109 11 10 Pass
0.0031 106 11 10 Pass
0.0032 105 11 10 Pass
0.0032 104 11 10 Pass
0.0033 100 11 11 Pass
0.0033 97 11 11 Pass
0.0034 94 11 11 Pass
0.0034 91 11 12 Pass
0.0034 91 11 12 Pass
0.0035 88 11 12 Pass
0.0035 84 11 13 Pass
0.0036 82 10 12 Pass
0.0036 81 10 12 Pass
0.0037 80 10 12 Pass
0.0037 78 10 12 Pass
0.0037 77 10 12 Pass
0.0038 73 10 13 Pass
0.0038 73 10 13 Pass
0.0039 73 9 12 Pass
0.0039 71 9 12 Pass
0.0040 70 9 12 Pass
0.0040 66 9 13 Pass
0.0040 65 9 13 Pass
0.0041 65 9 13 Pass
0.0041 64 9 14 Pass
0.0042 64 9 14 Pass
0.0042 64 9 14 Pass
0.0043 63 9 14 Pass
0.0043 62 9 14 Pass
0.0043 61 9 14 Pass
0.0044 59 9 15 Pass
0.0044 57 9 15 Pass
Water Quality BMP Flow and Volume for POC #1
On-line facility volume: 0.0223 acre-feet
On-line facility target flow: 0.0369 cfs.
Adjusted for 15 min: 0.0417 cfs.
Off-line facility target flow: 0.0209 cfs.
Adjusted for 15 min: 0.0237 cfs.
Stream Protection Duration
Predeveloped Landuse Totals for POC #2
Total Pervious Area:0.45
Total Impervious Area:O
Mitigated Landuse Totals for POC #2
Total Pervious Area:O
Total Impervious Area:0.45
Page 2
Flow Frequency Return Periods for Predeveloped. POC #2
Return Period Flow(cfs)
2 year 0.000971
5 year 0.004233
10 year 0.009137
25 year 0.020755
50 year 0.035262
100 year 0.056801
Flow Frequency Return Periods for Mitigated. POC #2
Return Period Flow(cfs)
2 year 0.000373
5 year 0.0007
10 year 0.001013
25 year 0.001553
50 year 0.002083
100 year 0.002747
Stream Protection Duration
Annual Peaks for Predeveloped and Mitigated. POC #2
Year Predeveloped Mitigated
1956 0.007 0.000
1957 0.001 0.001
1958 0.000 0.000
1959 0.001 0.000
1960 0.002 0.001
1961 0.005 0.000
1962 0.000 0.000
1963 0.004 0.001
1964 0.005 0.000
1965 0.001 0.000
1966 0.000 0.000
1967 0.002 0.000
1968 0.000 0.000
1969 0.000 0.000
1970 0.000 0.000
1971 0.002 0.000
1972 0.012 0.001
1973 0.000 0.000
1974 0.007 0.000
1975 0.000 0.000
1976 0.002 0.000
1977 0.000 0.000
1978 0.002 0.000
1979 0.000 0.000
1980 0.001 0.000
1981 0.002 0.000
1982 0.002 0.001
1983 0.001 0.001
1984 0.002 0.000
1985 0.000 0.000
1986 0.002 0.001
1987 0.024 0.001
1988 0.000 0.000
1989 0.000 0.000
1990 0.004 0.001
Page 29
1991 0.021 0.001
1992 0.000 0.000
1993 0.000 0.000
1994 0.000 0.000
1995 0.003 0.000
1996 0.008 0.001
1997 0.012 0.000
1998 0.000 0.000
1999 0.004 0.000
2000 0.001 0.000
2001 0.000 0.000
2002 0.004 0.001
2003 0.000 0.000
2004 0.002 0.001
2005 0.000 0.000
2006 0.002 0.000
2007 0.035 0.001
2008 0.001 0.025
Stream Protection Duration
Ranked Annual Peaks for Predeveloped and Mitigated. POC #2
Rank Predeveloped Mitigated
1 0.0346 0.0249
2 0.0245 0.0006
3 0.0214 0.0006
4 0.0125 0.0006
5 0.0116 0.0006
6 0.0079 0.0005
7 0.0073 0.0005
8 0.0066 0.0005
9 0.0051 0.0005
10 0.0047 0.0005
11 0.0043 0.0005
12 0.0041 0.0005
13 0.0036 0.0005
14 0.0035 0.0005
15 0.0034 0.0005
16 0.0024 0.0005
17 0.0024 0.0005
18 0.0024 0.0005
19 0.0022 0.0004
20 0.0021 0.0004
21 0.0021 0.0004
22 0.0020 0.0004
23 0.0017 0.0004
24 0.0017 0.0004
25 0.0016 0.0004
26 0.0015 0.0004
27 0.0012 0.0004
28 0.0011 0.0004
29 0.0009 0.0004
30 0.0008 0.0004
31 0.0007 0.0004
32 0.0007 0.0004
33 0.0007 0.0004
34 0.0005 0.0004
Page 30
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M M M M M T a' 3, �' :T ,T C C a' a' in M in In U] Pi H H Lii 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0.0107 7 7 100 Pass
0.0110 7 7 100 Pass
0.0114 7 5 71 Pass
0.0117 6 5 83 Pass
0.0121 5 5 100 Pass
0.0124 5 4 80 Pass
0.0128 4 4 100 Pass
0.0131 4 2 50 Pass
0.0135 4 2 50 Pass
0.0138 4 2 50 Pass
0.0142 4 2 50 Pass
0.0145 4 2 50 Pass
0.0149 4 2 50 Pass
0.0152 4 2 50 Pass
0.0156 4 2 50 Pass
0.0159 4 2 50 Pass
0.0163 3 2 66 Pass
0.0166 3 2 66 Pass
0.0170 3 2 66 Pass
0.0173 3 2 66 Pass
0.0177 3 2 66 Pass
0.0180 3 2 66 Pass
0.0184 3 2 66 Pass
0.0188 3 2 66 Pass
0.0191 3 2 66 Pass
0.0195 3 2 66 Pass
0.0198 3 2 66 Pass
0.0202 3 2 66 Pass
0.0205 3 2 66 Pass
0.0209 3 2 66 Pass
0.0212 3 2 66 Pass
0.0216 2 2 100 Pass
0.0219 2 2 100 Pass
0.0223 2 2 100 Pass
0.0226 2 2 100 Pass
0.0230 2 2 100 Pass
0.0233 2 2 100 Pass
0.0237 2 2 100 Pass
0.0240 2 2 100 Pass
0.0244 2 2 100 Pass
0.0247 1 1 100 Pass
0.0251 1 0 0 Pass
0.0254 1 0 0 Pass
0.0258 1 0 0 Pass
0.0261 1 0 0 Pass
0.0265 1 0 0 Pass
0.0268 1 0 0 Pass
0.0272 1 0 0 Pass
0.0275 1 0 0 Pass
0.0279 1 0 0 Pass
0.0282 1 0 0 Pass
0.0286 1 0 0 Pass
0.0289 1 0 0 Pass
0.0293 1 0 0 Pass
0.0296 1 0 0 Pass
0.0300 1 0 0 Pass
0.0303 1 0 0 Pass
Prigs 32
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0.0307 1 0 0 Pass
0.0310 1 0 0 Pass
0.0314 1 0 0 Pass
0.0317 1 0 0 Pass
0.0321 1 0 0 Pass
0.0325 1 0 0 Pass
0.0328 1 0 0 Pass
0.0332 1 0 0 Pass
0.0335 1 0 0 Pass
0.0339 1 0 0 Pass
Water Quality BMP Flow and Volume for POC #2
On-line facility volume: 0.001 acre-feet
On-line facility target flow: 0.0005 cfs.
Adjusted for 15 min: 0.0006 cfs.
Off-line facility target flow: 0.0003 cfs.
Adjusted for 15 min: 0.0004 cfs.
Stream Protection Duration
Predeveloped Landuse Totals for POC #3
Total Pervious Area:0.17
Total Impervious Area:O
Mitigated Landuse Totals for POC #3
Total Pervious Area:O
Total Impervious Area:0.17
Flow Frequency Return Periods for Predeveloped. POC #3
Return Period Flow(cfs)
2 year 0.06193
5 year 0.077532
10 year 0.08607
25 year 0.095314
50 year 0.101302
100 year 0.106664
Flow Frequency Return Periods for Mitigated. POC #3
Return Period Flow(cfs)
2 year 0.06193
5 year 0.077532
10 year 0.08607
25 year 0.095314
50 year 0.101302
100 year 0.106664
Water Quality BMP Flow and Volume for POC #3
On-line facility volume: 0.0319 acre-feet
On-line facility target flow: 0.0383 cfs.
Adjusted for 15 min: 0.0433 cfs.
Off-line facility target flow: 0.0209 cfs.
Adjusted for 15 min: 0.0237 cfs.
Page 33
10. EROSION AND SEDIMENT CONTROL
Erosion and sediment control work is a continuous and ongoing element of the construction
phase of the project. Erosion and sediment control work is the first aspect of project
construction and will continue beyond the active construction phase of the project. The
Temporary Erosion and Sediment Control Plan include the standard notes for the Best
Management Practice along for measures directed specifically for this site. The erosion
control measures used for this site include a construction entrance and silt fences or brush
barriers.
Page 34
APPENDIX A
Soils Classification -Twiss Laboratories
April 8, 2014
Les Hoyt
NE 2282A Old Belfair Hwy
Belfair, WA 98528
Project: Mt View Est. Faze 2 Lab Work Order#: 139658
Sample Date: 3/26/14 Date Received:
3/27/14
Sample ID: Lot 1
Lab No: 139658-01
Particle Size Analysis
Method: USDA Modified Pipet
Gravel % Sand% Silt% Clay%
>2.00 mm 2.00-0.075 mm 75-2 gm <2 pm
75.8 90.1 8.2 1.7
USDA Textural Classification: Extremely Gravelly Sand
Note:The textural classification is based on the percentage by weight of only the material finer than 2 mm.
Sample ID: Lot 5
Lab No: 139658-02
Particle Size Analysis
Method: USDA Modified Pipet
Gravel% Sand% Silt% Clay%
>2.00 mm 2.00-0.075 mm 75-2 pm <2 Wn
49.8 79.3 15.4 5.3
USDA Textural Classification: Gravelly Loamy Sand
Note: The textural classification is based on the percentage by weight of only the material finer than 2 mm.
Page 35
Project: Mt View Est. Faze 2 Lab Work Order#: 139658
Sample Date: 3/26/14 Date Received:
3/27/14
Sample ID: Lot 6
Lab No: 139658-03
Particle Size Analysis
Method: USDA Modified Pipet
Gravel% Sand % Silt% Clay%
>2.00 mm 2.00-0.075 mm 75-2 pm <2 gm
26.1 88.4 9.7 2.0
USDA Textural Classification: Gravelly Sand
Note: The textural classification is based on the percentage by weight of only the material finer than 2 mm.
Page 36
APPENDIX B
CONSTRUCTION STORMWATER POLLUTION PREVENTATION PLAN
(SWPPP)
1. Mark Clearing Limits or Areas of Disturbance. Describe the extent of your overall project.
Indicate the boundaries of lawn, landscape, trees to be preserved and any sensitive buffer
areas that need to be marked.
• The clearing limits are clearly shown on the grading and erosion control plan. The
proposed project includes an access road and stormwater facilities for a 6-lot
large lot development. The property includes 2 wetlands, one on the east side of
the property and a second small wetland along the south property line.
2. Establish Construction Access. Describe how you will accommodate construction vehicle
access and provide a stabilized construction entrance and plan for handling sediment
which is tracked off site.
• A construction access will be located through an existing access easement on the
northwest side of the property.
3. Control Flow Rates. Describe how adjacent properties and waterways will be protected
from erosion due to an increases in runoff from the project site.
• Adjacent properties will not see any additional runoff from this site. Stormwater
from the developed site will infiltrate into the existing soils.
4. Install Sediment Controls. Describe methods used to stabilize and protect exposed soil
from erosion due to rainfall events.
• The only erosion control measures that should be necessary for this project is the
construction entrance and silt fences or brush barriers. All stormwater from the
developed site will travel through a silt fence or brush barrier prior to leaving the
site.
S. Stabilize Soil. Describe methods used to stabilize and protect exposed soil from erosion
due to rainfall events.
• The majority of the disturbed soils will be with the construction of the access road
and stormwater facilities. The soils should not be exposed to extended lengths of
time. If the soils need to be protected for an extended period, straw can be used
to protect the soils. Once construction is completed, any exposed soil will be
covered with a grass seed mix or mulch.
6. Protect Slopes. If slopes are present on your property, describe how they will be protected
from construction activity.
• Slopes will be protected with straw and hydroseed.
7. Protect Drain Inlets. If there are drain inlets on the property or in the immediate vicinity,
describe how they will be protected during construction activity.
• There are no inlets to protect with this property.
8. Stabilized Channels and Outlets. If applicable, stabilization shall be provided to prevent
erosion of outlets, adjacent streams banks and slopes.
• There are no channels to protect with this project. The wetlands are a great
distance away from the access road and will not need additional protection.
9. Control Pollutants. All pollutants (including waste materials and demolition debris) that
occur on site shall be handled and disposed of in a manner that does not cause
contamination of stormwater. Potential sources of contamination include concrete work
and painting activities.
• The construction site will be kept clean to prevent contamination of adjacent
properties and stormwater. Excess concrete and paint will be disposed of in such
a manner as to not pollute the surrounding area.
10. Control De-Watering. If applicable, identify how you will control foundation, vault and
trench de-watering water discharge.
• De-watering or groundwater is not anticipated to be an issue with this project.
11. Maintain BMP's. Describe your plan for maintenance of all BMP's.
• Maintenance of BMP's are explained in the notes included in the design drawings.
Sediments will need to be removed along the silt fence as explained in the notes.
12. Manage the Project. Describe any phasing where applicable, address seasonal work
limitations and timing of demolition, grading and construction work activities.
• Construction is planned for summer and fall of 2014. There should not be any
phasing with this project. If needed,the site can be protected with jute matting,
mulch, straw and grass seed.
Page 36
APPENDIX B
State Access Permit-Highway 3
Adft
MWashington State Olympic Region Headquarter
AP Department of Transportation 5720 Capitol Boulevard,Tumwater
P.O.Box 47440
Lynn Peterson Olympia WA 98504-7440
Secretary of Transportation 360-357.2600
......................... ...
Fax 360-357.2601
TTY:.�Cp'F1'8111 et`T6,2013 www sdot. a.gov 88
www.wsdot.wa.gov
Leslie&Becky Hoyt
2282A Old Belfair Highway
Belfair WA 98526
RE: R S 3,MP 18.80 Right Vicinity
Joint Use Access Connection Permit No.49498
Add an additional 8 single family residential(SFR)lots to existing 6 SFR
Permit(RAMPS#46151)
Dear Mr.and Mrs.I loyt:
Thank you for the prompt completion and return of the access connection documents.
Enclosed is your original of the fully executed access connection permit.
No work is anticipated on this driveway at this time. For any future work on the
driveway or within WSDOT right of way,you must contact the WSDOT Port
Orchard Maintenance office at(360)874-3050 to schedule a pre-construction
conference. No work is authorized within WSDOT right of way until after you have
given the required notice to the State's representative and completed the pre-
construction conference.
If you should have any questions or concerns regarding the permit please contact
Debbie Johnson at(360)357-2667,or myself at(360)357-2736.
Sincerely,
Dale C.Severson,P.E.
Development Services Engineer
DCS:dIj
DLJ
Enclosure
cc: Duke Stryker,WSDOT Port Orchard Maintenance,via e-mail
Page 39
Access Connection Permit
Name and Address of Applicant: Permit Number 49498 Width 40, Asphalt
Leslie E&Becky S Hoyt SR MP LT/RT
2282A Old Belfair Highway 3 18.800 Right
Belfair,WA 98526 LONGITUDE Region
LATITUDE Olympic
County Tax Parcel Number
Mason 122314100000
Government Lot Number
n/a
Phone(Optional) (360)275-0108 NE 1/4 of SE 1/4 of s 31 T 22N R 1
Permit Category Current Highway Classification
® 1-Minimum Connection ❑ 1-1320'Minimum Approach Spacing Required
❑ 2-Minor Connection 9 2-660'Minimum Approach Spacing Required
❑ 3-Major Connection ❑ 3-330'Minimum Approach Spacing Required
❑ 4-Temporary Connection ❑ 4-250'Minimum Approach Spacing Required
❑ 5-125'Minimum Approach Spacing Required
Access Connection meets current Department location,spacing,and design criteria: ❑Conforming ®Non-Conforming ❑variance
The Applicant,hereinafter referred to as the"Grantee",having applied for a permit to construct/upgrade,use,and
maintain an access connection to serve:
8 single family residential lots only.
NOTE: This approach is existing and currently serves 6 single family residential lots(under RAMPS#46151,
Mason County Tax Parcel 12231-14.00000). With the addition of 8 lots(Mason County Tax Parcel
12231-41-00000),a total of 14 single family residences will jointly use this driveway.
The Washington State Department of Transportation or its designee,herein after referred to as the"Department",
hereby orders that this permit be granted,subject to the terms and provislons stated upon the General Provisions
hereof and Exhibits attached hereto and by this reference made a part hereof:
Exhibit A:Special Provisions for Highway Encroachments,Pages 1&2
Exhibit B:WSDOT Right of Way-Cranberry Creek to Junction Primary State Highway No.14,Page 1
This permit shall be void unless the construction herein contemplated is started within 90 days of issuance and completed
within 120 days of issuance,unless otherwise provided herein.
This permit is accepted and approved by the Gran ee,. ubject to the terms and provisions as herein set forth.
PERMIT H LDER DEPAR.TMMEErNTT OF TRANSPORTATION
By: , -xl By: .a�c r✓�.Ca c.�r —
��) ,/ DALE C.SEVERSON,P.E.
Title: E'? ?g�� (�(J /t,(/�-� Title: Devel"',ent Smim Eneimr
Date: Date: 09-16-2013
RAMPS-Accoss con"oclion Pvmn-Pepe I
Page 40
General Provisions
I The Permit Holder,its successors and assigns,agrees to protect the State of Washington,its officers and employees and save them harmless
from all claims,actions or damages of every kind and description which may accrue to or be suffered by any person,persons,or property
by reason of the acts or omissions of the Permit Holder,its assigns,agents,contractors.licensees,employees or any person whomsoever,in
connection with Permit Holder's,its assigns',agents',contractors',licensees'or employees'construction,installation,maintenance,operation,
use or occupancy of the right of way or in the exercise of this permit. In case any suitor action is brought against the State of Washington,
its officers and employees,arising out of or by reason of any of the above causes,the Permit Holder,its successors or assigns will,upon notice
of such action,defend the same at its sole cost and expense and satisfy any judgement against the State of Washington,its officers,or
employees:PROVIDED,that if the claims or damages are caused by or result from the concurrent negligence of(a)the State of
Washington's agents or employees and(b)the Permit Holder or Permit Holder's agents or employees,this indemnity provision shall be valid and
enforceable only to the extent of the negligence of the Permit Holler or the Permit Holders agents or employees.
The Permit Holder,and on behalf of its assigns,agents,licensees,contractors and employees agrees to waive any claims for losses,expenses,
damages or lost revenues incurred by it or its agents,contractors,licensees,employees or customers in connection with Permit Holder's,its
assigns',agents',contractors',licensees'or employees'construction,installation,maintenance,operation,use or occupancy of the right of
way or in the exercise of this permit against the State of Washington,its agents or employees except the reasonable costs of repair to
property resulting from the negligent injury or damage to Permit Holders property by the State of Washington,its agents,contractors or
employees.
2. During the progress of the work,such barriers shall be erected and maintained as may be necessary or as may be directed for the protection
of the traveling public;the barriers shall be property lighted at night.
3. Except as herein authorized.no excavation shall be made or obstacle placed within the limits of the State highway in such a manner as to
interfere with the travel over said road.
4, If the work done under this permit interferes in any way with the drainage of the State highway,the Permit Holder shall wholly and at is own
expense make such provision as the Department may direct to take rare of said drainage.
5. Permit Holier hereby authorizes the Department to enter upon their lands where necessary to construct or reconstruct the permitted access
connection and/or construct and maintain traffic control devices and appurtenances.
6. The access connection shall be maintained between the right of way line and the shoulder line of said(highway,frontage service road of said
highway,highway and/or frontage service road, Line of said highway)by the Permit Holder,their heirs,successors or assigns
7. On completion of said work herein contemplated,all rubbish and debris shall be immediately removed and the roadway and roadside shall be
Left neat and presentable and satisfactory to the Department.
8 the cost of construction or modification of a connection shall be the responsibility of the Permit Holder,including the cost of modification of any
connection requred as a result of changes on property site use in accordance with WAC 468-51-110.
g- The Department hereby reserves the right to order the change of location or the removal of any structure or structures authorized by this
permit at any time,said change or removal to be made at the sole expense of the party or parties to whom this permit is fissured,or their
successors and assigns.
10, Existing permitted connections impacted by the Department's work program and which,in the consideration of the Department,necessitate
modification,relocation,or replacement in order to meet current Department connection location,quantity,spacing,and design standards,
shall be modified,relocated,or replaced in kind by the Department at no cost to the Permit Holder. The cost of further enhancements or
modification to the altered,relocated,or replaced connections desired by the Permit Holder shall be the responsibility of the Permit Holler.
11. If any changes are made or proposed in the land use,intensity of development,type of traffic,or traffic flow of the property served by this
connection permit,the Permit Holder is required to contact the Department to determine if further analysis is needed to determine 0 the change is
significant and would require a new permit and modifications to the connection.
12. All such changes,reconstruction,or relocation by the Permit Holder shall be done in such manner as will cause the least interference with any of
the Department's work.and the Department shall in no way be held liable for any damage to the Permit Holder by reason of any such work by the
Departmert,its agents or representatives,or by the exercise of any rights by the Department upon roads,streets,pubic places,or structures
in question.
13. This permit or privilege shall not be deemed or held to be an exclusive one and shall not prohibit the Department from granting other permits
or franchise rghls of I.ke or other nature to other public or private companies or individuals,nor shall it prevent the Department from using
any of its roads,streets,or public places,or affect its right to full supervision and control over all or any part of them,none of which is hereby
surrendered.
14, The Department may revoke.amend,or cancel this permit or any of the provisions thereof at any time by giving written notice to the Permit Holder.
The Permit Holder shall immediately remove all facilities from the right of way. Any facilities remaining upon the right of way 30 days after written
notice of cancellation shall be removed by the Department at the Permit Holders expense.
15. It is the responsibility of the apllicant or Permit Holder to obtain any other local permits or other agency approvals that may be required,including
satisfaction of all environmental regulations. It is also the responsibility of the Permit Holder to acquire any property rights necessary to provide
continuity from the applicant's property to the Department's right-of-way if the Permit Holders property does not abut the right of way.
16. The party of parties to whom this permit is issued shall maintain at its or their sob expense the structure or object for which this permit is
granted in a condition satisfactory to the Department
17. Any breach of any of the conditions and requirements herein made,or failure on the part of the Permit Holder of this permit to proceed with due
diligence and in good faith after its acceptance,with construction work hereunder,shall subject this permit to cancellation as herein provided.
18. This permit is subject to all applicable provisions of 468.61 WAC,468-52 WAC,Chapter 47.50 RCW,Chapter 47.32 RCW,and/or
Chapter 47.44 RCW,and amendments thereto.
W.MPe-Access C.—!i-P-1-Puau 2
Page 41
Special Provisions for
Highway Encroachments
Permit No. 49498
Applicable provisions are denoted by
®1. No work provided for herein shall be performed until the Permit Holder is authorized by the following Department representative:
WSDOT Port Orchard Maintenance
8293 Spring Creek Road SE
Port Orchard WA 98387
(360)874-3050
®2. Prior to the beginning of construction,a preconstruction conference shall be held at which the Department and the Permit Holder and Permit Holder's
engineer,contractor,and inspector shall be present.
®3. Should the Permit Holder choose to perform the work outlined herein with other than Its own forces,a representative of the Permit Holder shall be
present at all times unless otherwise agreed to by the Department representative.All contact between the Department and the Permit Holder's
contractor shelf be through the representative of the Permit Holder. Where the Permit Holder chooses to perform the work with its own forces.it
may elect to appoint one of its own employees engaged in the construction as its representative. Failure to comply with this provision shall be
grounds for restricting any further work by the Permit Holder within the State right of way until said requirement is met. The Permit Holder,at its
own expense,shall adequately police and supervise all work on the above described project by itself,its contractor,subcontractor,agent,and
others,so as not to endanger or injure any person or property.
®4. A copy of the permit must be on the job site and protected from the elements at all times during any of the construction authorized by said permit.
05. This permit does not give the Permit Holder or any agent or contractor of the Permit Holder any rights to cut,spray,retard,remove,destroy,
damage,disfigure or in any way modify the physical condition of any vegetative material located on the highway right of way,except by written
permission from the Department or for purposes as described by No.6 if denoted below. All restoration shall be done to the satisfaction of the
Department at the sole expense of the Permit Holder.
6. If necessary to increase sight distance,brush shall be removed from both sides of the access connection and stumps shall be removed.
The indiscriminate cutting of merchantable timber or disfiguring of any feature of scenic value shall not be permitted.
[�7. The access connection(s)shall be constructed in accordance with the attached
Sufficient length of diameter culvert pipe shall be placed In ditch and laid to a true line and grade.
The access connection(s)shall be surfaced to the limits as shown on the plan with a 150 millimeter(6 inch)minimum compacted depth of gravel
base material and a 80 millimeter(3 inch)compacted depth of crushed surfacing top course. Asphalt paving will not be required.Finished grade
of the access connection shall be in accordance with the profile control as shown on the attached plan.Directing of surface water from private
property to Department right of way will not be permitted.unless otherwise approved by the Department.
j�8. The access conrection(s)shall be constructed in accordance with the attached
Sufficient length of diameter culvert pipe shall be placed in ditch and laid to a true line and grade.
The access connection(s)shall be surfaced to the limits as shown on the plan with a 150 millimeter(6 inch)minimum compacted depth of gravel
base material,a 80 millimeter(3 inch)minimum compacted depth of crushed surfacing top course,and paved with a 80 millimeter(3 inch)
minimum compacted depth of Asphaltic Concrete Class 8 uNess otherwise specified by the Department. Any existing oil mat on shoulder or
roadway shall be removed and new pavement laid to a butt joint with existing pavement. Finished grade of new pavement shall be in accordance
with the profile control as shown on attached plan. Directing of surface water from private property onto Department right of way will not be
permilted,unless otherwise approved by the Department.
09 All buildings and appurtenances shall be so located at a distance from the right of way line of any State Highway that none of the fight of way
therefore is required for use of the patrons or customers of any such establishment. Permit Holder shall comply with local building codes. Setback
requirements for the location of buildingis In relation to the right of way line are a function of local authorities.and they should be consulted
regarding requirements that must be adhered to.
nAWS-Spa-Pray—f-Pup' Page 1 Exhibit"A"
Page 42
I
10 The Permit Holder agrees to schedule the work herein referred to and perform said work in such a manner as not to delay the Department's
contractor in the performance of his contract.
Q 11. Work within the right of way shall be restricted to between the hours of and and/or
.and no work shall
be allowed on the right of way Saturday.Sunday,or holidays.unless authorized by the Department. Any lane closures must be submitted for
approval in advance of use. The hours of permitted closure may differ from the above noted hours.
❑12. The shoulders,where disturbed.shall be surfaced with crushed surfacing top course minimum compacted
depth,or as directed by the Department. The surface of the finished shoulder shall slope down from the edge of pavement at
the rate of 5%unless otherwise directed. The restored shoulder must not have any strips or sections less than 0.6 meters(2 feet)wide.
The restored shoulder shall be surfaced with
®13, The Permit Holder shall be responsible for constructing and maintaining the access connection(s)and appurtenances between the shoulder line of
the highway and the right of way line inclusive of surfacing and drainage. The Department has the right to inspect all installations at the time of
construction and at any time afterward and to require that necessary changes and repairs be made. Unsatisfactory work will be corrected by the
Department,at the Permit Holder's expense,or access may be removed at the Permit Holder's expense. Directing of surface water from private
property onto Department right of way will not be permitted.
14, The access aconnection shall be sufficiently surfaced back an adequate distance from the edge of the pavement to prevent any tracking of
material onto the highway. Any tracking of material onto the highway shsll be subject to enforcement of Chapter 46,61.655 RCW and shah be
immediately cleaned up by the Permit Holder or the Permit Holder's agent.
015 Standard highway warning signs designated as"Truck Crossing"sign,plate WS-6,shall be placed and maintained at Permit Holder's expense on
each sale of the access connection. Signs shall be in evidence only when access is actually being used. If necessary,flagmen shall be
provided. Sufficient parking space shall be provided by the Permit Holder outside Department right of way so no vehicles will be parked on
said right of way.
16 All manholes,valve covers,and like appurtenances shall be constructed at such an elevation to conform to the shoulder slope from the edge of
pavement or as directed by the Department.
®17. All slopes,slope treatment,top soil,ditches,pipes.etc.,disturbed by this operation shall be restored to their original cross section and
condition. All hazards shall be marked by warning signs,barricades,and lights. If necessary,flogmenshall be employed for the purpose of
protecting the trav6ng public. Roadside operations shall be specified by the Department's representative.
®18 During the construction and/or maintenance of this facility,the Permit Holder shall comply with the Manual on Uniform Traffic Control Devices for
Streets and Highways,(Federal Highway Administration)and Washington modifications thereto. If determined necessary by the Department,
the Permit Holder shall submit a signing and traffic control plan to the Department's representative for approval prior to construction or maintenance
operations. No lane closures shall be allowed except as approved by the Department representative. Approvals may cause revision of special
provisions,including hours of operation.
�] 19 Bond coverage required to ensure proper compliance with all terms and conditions of said permit will be furnished by a Blanket Surety Bond
held by the Department at the Olympia Service Center,
20 A surety bond in the amount of written by a surety company authorized to do business in the State of Washington
shall be furnished to ensure compliance with any and all of the terms and conditions of this permit and shall remain in force until
all work under this permit has been completed and approved by the Department.
®21 Relative to advertising adjacent to ail State highways,we wish to call your attention to the Sceni Vistas Act of 1971,Chapter 47.42 RCW and
State Transportation Commission.ruling Chapter 468.66 WAC. Violation of this section of the statutes will be sufficient cause for cancellation
of this permit. On-premise signs are allowed
22. The Permit Holder shall notify the Department's representative upon completion of the work under this permit so that a final inspection can be made.
023. The responsibility of the Permit Holder for proper performance•safe conduct,and adequate policing and supervision of the project shall not be
lessened or otherwise affected by Department approval of plans,specifications•or work,or by the presence at the work site of Department
representatives,or by compliance by the Grantee with any requests or recommendations made by such representatives.
®24. All material and workmanship shall conform to the Washington State Department of Transportation Standard Specifications for Road,Bridge
and Municipal Construction,current edition,and amendments thereto,and shall be subject to inspection by the Department.
Rums 61 1P—mau.rave2 Paget Exhibit"A"
Page 43
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APPENDIX C
Wetland Report
Page 46
TIH WETLAND CORPS 'Ir\71,
Wetland Delineation • Habitat.Management Plans • Riparian Restoration , Mitigation • Biological Evaluation
HOYT WETLAND DELINEATION REPORT
Parcel 1.2231- 1-00000
Allyn, Washington
Mason County
Prepared for:
Leslie and Becky Hoyt
2282A Old Belfair Highway
Belfair,Wa 98528
Prepared by:
Lee Boad and Heather Lane
August 2013
PO Box 2854 Belfair,Washington 98528-Cell Phone 360-620-0618 wetlandcorps@hotmail.com
THE WETLAND CORPS 'W"v"
Wetland Delineation • Habitat Management Plans , Riparian Restoration - Mitigation � Biological Evaluation
HOYTWETLAND DELINEATION REPORT
TABLE OF CONTENTS
INTRODUCTION......................................................................................................................... I
GENERAL SITE CONDITIONS....................................... ........................................................ .I
METHODOLOGY........................................................................................................................2
BACKGROUNDINFORMATION.............................................................................................
WETLAND DELINEATION RESULTS.............................................-....................................4
WETLANDEVALUATION ..................................... .................................................................--..... ...........7
WETLANDCONCLUSION........................................................................................................ 8
REFERENCES............................................................................................. ........................
Figures
Figure 1. Site Vicinity Map
Figure 2. Wetland Boundary Map
Figure 3. National Wetland Inventory Map
Figure 4. Mason County Soil Survey Map
Figure 5. Department of Natural Resources Water Resource Map
Appendices
Appendix A. Routine Wetland Determination Data Forms
Appendix B. Soil Survey Text
Appendix C. Washington State Wetland Rating System Form
PO Box 2854 Belfair,Washington 98528-Cell Phone 360-620-0618 -wetlandcorps(a)hotmail.com
THE WETLAND CORPS 1
Wetland Delineation - Habitat Management Plans - Riparian Restoration - Mitigation - Biological Evaluation
August 2013 Project#TWC13W35
Page 1 of 16
HOYT WETLAND DELINEATION REPORT
MASON COUNTY PARCEL 122314100000
Highway 3
Allyn, WA
INTRODUCTION
The Wetland Corps has been authorized by Leslie Hoyt to perform a wetland delineation
at the property located in Allyn, Mason County, Washington, (Tax Identification Number
122314100000). The delineation was performed to .identify wetlands and associated
buffers that would be applicable to future development of the parcel. The delineation
was completed throughout the third week of August 2013.
The property is located in the southeastern quarter of Section 31, Township 22 North,
Range 01 West WM(Figure 1 Vicinity .Map). The entire ownership is 40 acres in size.
For the purposes of federal, Washington State, and Mason County jurisdictional
oversight, this wetland delineation followed the methodology outlined in the Regional
Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountains,
Valleys, and Coast Region (Version 2.0) U.S. Army Corps of Engineers May 2010.
WAC 173-22-035 states delineations should be done according to this manual and
supplements. The changes became effective March 14, 2011. The sections below provide:
(1) an introduction to the site; (2) a description of methods used in the field delineation;
and, (3) technical results.
GENERAL SITE CONDITIONS
The ownership is accessed via Highway 3, approximately one-quarter mile south of
Hardings Hill Road. Highway 3 makes up a small portion of the western boundary of the
parcel. Undeveloped parcels of similar size border the ownership to the north, south, east
and west. An existing road grade enters the northwest portion of the ownership from the
adjacent parcel to the north, and continues easterly along the northern third of the
property. Topography within the property slopes southeasterly down toward a long
wetland swale that enters the property from the northeastern property corner, and
continues off the property for several acres.
The ownership consists of upland forested areas comprised of Douglas fir and an
understory of salal, evergreen huckleberry, Oregon grape and swordfem, and also some
scattered clearings. The wetland swale is comprised of varying vegetative communities,
including dense patches of willow and spirea and forested areas dominated by young red
alder with an associated understory of salmonberry, spirea, slough sedge, piggy back
PO Box 2854 Belfair,Washington 98528•Cell Phone 360-620-0618.Office Phone 360-372-2421-boad40@peoplepc.com
Parcel 122314100000 Wetland Delineation
TWC13-W35
August 2013
Page 2 of 9
plant, and wild lily of the valley. A second smaller depressional wetland is located
within the southwestern portion of the property, and is characterized by an herbaceous
community of slough sedge and soft rush with lesser amounts of spirea and salmonberry.
METHODOLOGY
Review of Existing Information
Consistent with procedures outlined in the 2010 Regional Supplement to the Corps of
Engineers Wetland Delineation Manual preliminary information was gathered on the project
site prior to the field review and delineation. General information sources included:
United States Geological Service(USGS)topographic maps, 1974 United States Fish and
Wildlife Service (USFWS) National Wetland Inventory (NWI) maps, the Soil Survey of
Mason County Area, Washington (USDA, 1951), and Mason County's critical areas
regulations.
Field Delineation
Methodology used for wetland delineation was consistent with the technical approaches
articulated in the 2010 Manual. This document is the wetland delineation manual that is
used in determining wetland areas when applying state and local government regulations
under the Shoreline Management Act and the Growth Management Act in Washington
State.
The extent and location of suspect wetlands were determined during field work
performed August 2013. Field work was conducted under cloudy skies with an ambient
temperature ranging between 55 and 60 degrees Fahrenheit. The time of year and recent
precipitation history were considered in assessing the extent of the suspect wetland
presumed to exist on site.
Specific field methodology used in determining the extent and location of wetland areas
include:
1. As part of the initial project site reconnaissance, the site was walked to determine
the general extent and location of potential wetland areas;
2. Wetland and upland sample plots were established in the identified potential
wetland areas and in the adjacent upland area; and
3. Wetland boundaries were delineated with flagging by noting localized topography
and vegetation patterns and comparing parameters of hydrology, soil, and
vegetation with data collected at the wetland and upland sample plots.
The project area was investigated and data was collected at four sample plot locations
within the large wetland, and two sample plots within the smaller wetland. Data
collected at each sample plot were entered onto a Routine Wetland Determination Data
PO Box 2854 Belfair,Washington 98528•Cell Phone 360-620-0618 -wetlandcorps@hotmail.com
Parcel 122314100000 Wetland Delineation
TWC 13-W35
August 2013
Page 3 of 9
Form (Washington State Department of Ecology 1997). Copies of data forms for each
sample plot are provided in Appendix A.
BACKGROUND INFORMATION
Mason County Soil Survey
The soil survey of Mason County indicates two onsite soil types within and in the vicinity
of the subject parcel, (USDA, 1951):
Ab - Alderwood gravelly sandy loam, S to 15 percent slopes. The Alderwood series
consists of brown, well-drained, upland soils. They have developed from mixed gravelly
glacial till dominated by acid igneous rock. The imbedded gravel is mainly granite and
quartzite. Rainfall is 45 to 60 inches a year. The .native vegetation is a dense forest
consisting almost entirely of Douglas-fir and a dense understory of salal, Oregon-grape,
vine maple, and huckleberry. Northeast of the Hood Canal the understory is mainly
rhododendron. Alderwood soils occupy the extensive rolling glacial moraines, and they
are the dominant soils in the eastern part of the county. The Alderwood soils are
associated with the somewhat excessively drained Everett and Indianola soils and with
the moderately well drained Kitsap soils. The Alderwood gravelly sandy loam, 5 to 15
percent slopes (Ab) is the most extensive, soil of the Alderwood series. It occupies
undulating to rolling moraines. Alderwood gravelly sandy loam, 15 to 30 percent slopes
(Ac).-This soil varies more in depth, but otherwise it is similar to Alderwood gravelly
sandy loams, 5 to 15 percent slopes.
(Bd). Bellingham silt loam, 0 to 3 percent slopes This soil is found on upland
depressions and glacial-like basins. They developed from glacial materials, and are a
very poorly drained, silty soil. The soil is medium acid and high in organic matter. The
surface soil is up to 10 inches deep, and contains much organic matter and many small
roots. Bellingham is associated with Kitsap soils. The soil is wet and swampy if not
drained. The clay is hard when dry, plastic when wet, and firm when moist. This soil is
in capability subclass IVw. This soil is listed Mason County's hydric soils list.
A more detailed soil description can be found in Appendix B Mason Soil Survey Text.
National Wetlands Inventory
The USFWS NWI map (online wetlands mapper) shows a portion of the onsite wetland
mapped south of the approximate property location, but is primarily mapped south of the
ownership (Figure 3. National Wetland Inventory Map). A portion of the wetland is
mapped within the southern section of the parcel, and is classified by the NWI as [P]
Palustrine [SS] Shrub-scrub [C] Seasonally flooded and [P] Palustrine [AB] Aquatic Bed
[H] Permanently.flooded.
PO Box 2854 Belfair,Washington 98528-Cell Phone 360-620-0618 -wetlandcorps@hotmail.com
Parcel 122314100000 Wetland Delineation
TWC 13-W35
August 2013
Page 4 of 9
Department of Natural Resources Water Resource
The Department of Natural Resources Water Resource Map shows no streams within the
vicinity of ownership. The nearest stream is mapped less than 500 feet east of the parcel,
and appears to drain northerly to eventually connect with other streams and larger
wetlands. Based on measurements from the Mason County GIS website, the drainage is
located approximately 620 feet east of the parcel, at the nearest point.
WETLAND DELINEATION RESULTS
A portion of a large wetland swale was identified extending north to south along the
western side of the parcel. This large wetland is identified in this report as Wetland A.
The western side of Wetland A within the parcel is flagged by TWC in pink ribbon
labeled WETLAND DELINEATION. The entire wetland system appears to occupy
approximately 13 acres in size, of which approximately 4.5 acres is located within the
subject parcel. Recent beaver activity located several hundred feet south of the parcel
partially blocks water from being evenly distributed throughout the wetland, causing a
break in surface flow through a culvert just south of the beaver activity. The break in
hydrology regime at the culvert divides the wetland into two hydrological units.
The northern half of the boundary of Wetland A was distinctly identified by an abrupt
transition from upland vegetation such as swordfern (Polystichum munitum, FACU) and
salal (Gaultheria shallon, FACU) to obligate and facultative wetland vegetation, such as
spirea (Spiraea douglasii, FACW) and slough sedge (Carex obnupta, OBL). The
southern half of the boundary of Wetland A was difficult to locate due to vegetation
indicators extending beyond soil and hydrology indicators. In addition, the southern
portion of the wetland and adjacent upland areas contain a dense community of rose
(Rasa nutkana, FAC), himilayan blackberry (Rubus discolor, FACU), salmonberry
(Rubus spectabilis, FAC+) and spirea (Spiraea douglasii, FACW), making it difficult to
traverse through the area. This southern portion of the wetland boundary was identified
by the presence of hydrology indicators such as saturated/soils and seeps along the low
gradient topography, in congruence with the presence of obligate and facultative wetland
vegetation such as spirea (Spiraea douglasii, FACW) and slough sedge (Carex obnupta,
OBL).
PO Box 2854 Belfair,Washington 98528-Cell Phone 360-620-0618 •wetlandcorps@hotinail.com
Parcel 122314100000 Wetland Delineation
TWC13-W35
August 2013
Page 5 of 9
V.
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17
Photo 1. Wetland A
The wetland unit appears to be hydrologically supported by a fluctuating water table
seasonal runoff from surrounding topography.
Wetland B is located approximately 400 feet west of Wetland A, and is approximately
150 feet north of the southern property boundary. Wetland B is a depressional wetland
with no surface water outlet, and is approximately 2000 square feet in size. The wetland
boundary was identified primarily by the presence of obligate and facultative wetland
vegetation such as slough sedge (Carex obnuptu, OBL) and soft rush (Juncus eufus,
FACW) growing within dark surface soils.
PO Box 2854 Belfair,Washington 98528•Cell Phone 360-620-0618 -wetlandcorps@hotmai .corn
Parcel 122314100000 Wetland Delineation
TWC 13-W35
August 2013
Page 6 of 9
oliq Ali�rn� � k
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Photo 2. Wetland B
Ve 7e#, tation
Wetland A generally contains two vegetative cotrnnunities: 1) A forested/shrub
community within the southern portion of the wetland, containing an overstory of red
alder (Alnus rubra, FAQ with lesser amounts of western red cedar(Thuja plicata, FAQ,
Pacific willow(Salix laciandra, FACW) and scoulers willow (Salix scouleriana, FACW)
with an understory of spiraea (Spiraea douglasii, FACW), with lesser amounts of
salmonberry (Rubus spectabilis, FAC+), himilayan blackberry (Rubus discolor, FACU)
and nootka rose (Rosa nutkana, FAQ with an herbaceous community dominated by wild
lily of the valley (Maianthemum dilatatum, FAC), piggy back plant (Tolmiea menziesii,
FAQ, slough sedge (Carex obnupta, OBL). 2) A shrub dominated community
comprised almost entirely of spires (Spiraea douglasii, FACW) with lesser amounts of
pacific willow (Salix lucianda, FACW), nootka rose (Rosa nutkana, FAG), salmonberry
(Rubus spectabilis,FAC+) and slough sedge(Carex obnupta, OBL).
Wetland B is dominated by herbaceous vegetation comprised of slough sedge (Carex
obnupta, OBL), soft rush (Juncus effufus, FACW) and piggy back plant (Tolmiea
menziessi, FAQ, with surrounding shrub species comprised of salmonberry (Rubus
spectabilis, FAC+), spirea (Spiraea douglasii, FACW) and pacific willow (Salix
lucianda, FACW).
PO Box 2854 Belfair, Washington 98528-Cell Phone 360-620-0618 •wetlandcorps@hotmail.com
Parcel 1 223 14100000 Wetland Delineation
TWC13-W35
August 2013
Page 7 of 9
The upland vegetation adjacent to the wetlands is comprised of an overstory of Douglas
fir (Pseudotsuga menziesii, FACU) with lesser amounts of western hemlock (Tsuga
heterophylla, FACU+). Understory species consist of salal (Gaultheria shallop, FACU),
evergreen huckleberry (Vaccinium ovatum, FACU), salmonberry (Rubus spectabilis,
FAC+), brackenfern (Pteridium aquilinum, FACU), swordfern (Polystichum munitum,
FACU), himilayan blackberry (Rebus discolor, FACU) and Oregon grape (Mahonia
nervosa,UPL).
Soils
The wetland test pits excavated within Wetland A and Wetland B revealed similar
characteristics to the soil profile of Bellingham silt loam (Bd), a soil type mapped south
of the parcel (See Figure 4. Mason County Soil Survey). The test pits revealed a two-
layer profile, the upper layer containing silt loam with a low matrix choma 10YR 2/1 and
10YR 3/1. The lower layer drastically transitioned to clay loam with matrix chroma
1 OYR 4/1 and 10YR 4/2 with many,medium-sized distinct mottles to 16 inches deep.
The soil profiles observed in known upland test pits were consistent with the mapped soil
type, Alderwood gravelly sandy loam. Upland test pits exhibited a two-layer soil profile.
The upper layer consists of gravelly sandy loam approximately five to eight inches deep
of matrix chroma 10YR 3/3 and 3/4. The lower profile contained less gravel with a
matrix chroma of 10 YR 6/3 and IOYR 6/4. No hydric soil indicators were present in
upland soil test pits.
Hydrology
Hydrology was indicated within Wetland A by FAC-neutral vegetation, drift lines,
drainage patterns, sediment deposits and water-stained leaves. In addition, the test pits
revealed soil saturation, inundation and free water in the test pits during the growing
season. Hydrology was indicated within Wetland B by FAC-neutral vegetation and soil
saturation/inundation during the growing season. Upland test pits showed no indicators
of wetland hydrology.
WETLAND EVALUATION
Wetland A meets criteria for a Depressional wetland based on functions per Washington
State Wetland Rating System for Western Washington (Hruby 2004) for the purposes of
rating. Based on functional attributes associated with the wetland including habitat, water
quality, and hydrology functions, it has been rated as a Category III wetland, scoring 41
points on the state rating form. The score for water quality functions in this wetland is
13, hydrological functions scored 8, and the score for habitat functions is 20. According
to Table 17.01.070 D of the Mason County Resource Ordinance, the base buffer width
for Category III Wetlands scoring between 20 and 28 points in habitat function, within
parcels intended for Moderate Impact Land Use require a base buffer width of 110 feet
with an additional 15-foot building setback. Moderate Impact Land Use is described in
Table 17.07.070 B of the Mason County Resource Ordinance as single-family residential
lots or residential subdivisions with 1 unit/acre or less.
PO Box 2854 Belfair,Washington 98528•Cell Phone 360-620-061.8 -wetiandcorps@hotmail.com
Parcel 122314100000 Wetland Delineation
TWC13-W35
August 2013
Page 8 of 9
Wetland B also meets criteria for a Depressional wetland based on functions per
Washington State Wetland Rating System for Western Washington (Hruby 2004) for the
purposes of rating. Based on functional attributes associated with the wetland including
habitat, water duality, and hydrology functions, it has been rated as a Category III
wetland, scoring 38 points on the state rating form. The score for water quality functions
in this wetland is 16, hydrological functions scored 7, and the score for habitat functions
is 15. According to Table 17.01.070 D of the Mason County Resource Ordinance, the
base buffer width for Category III Wetlands scoring less than 20 points in habitat
function, within parcels intended for Moderate Impact Land Use require a base buffer
width of 60 feet with an additional 15-foot building setback. Moderate Impact Land Use
is described in Table 17.07.070 B of the Mason County Resource Ordinance as single-
family residential lots or residential subdivisions with 1 unit/acre or less.
SUMMARY
This report discusses the presence of two Category III Wetlands within the subject
property, identified in this report as Wetland A and Wetland B. Wetland A contains
moderate habitat function, and requires a buffer of I I0-feet with an additional 15-foot
building setback in Mason County. Wetland B contains low habitat function, and
requires a buffer of 60-feet with an additional 15-foot building setback in Mason.County.
See Figure 2. Site Map for the approximate wetland and associated buffer location within
the property.
Thankyou f choosing The Wetland Corps as our environmental consultant. If you
y or g rp y
have any questions, feel free to call.
Respectfully submitted,
The Wetland Corps
Bather Lane
Staff Wetland Specialist
Lee Boad
Senior Ecologist
PO Box 2854 Belfair, Washington 98528-Cell Phone 360-620-0618 -wetlandcorps@hotmail.com
Parcel 122314100000 Wetland Delineation
TWC13-W35
August 2013
Page 9 of 9
REFERENCES
Cowardin, L.M., V. Carter,F.C. Golet and E.T. LaRoe, 1979. Classification of
Wetlands and Deepwater Habitats of the United States.U.S. Fish and
Wildlife Service document FWS/OBS-79/31. 84 pp. Washington, D.C.
Hitchcock, L.C. and A. Cronquist, 1973. Flora of the Pacific Northwest.
University of Washington Press.. 730 pp.
Hruby,T., 2004. Washington State Wetland Rating System for Western Washington -
Revised. Washington State Department of Ecology Publication#04-06-025.
Munsell Soil Color Charts, 1998. GretagMacbeth. New Windsor,New York.
Po'ar, J. and.A. MacKinnon, 1994. Plants o the Paci ac.North�t est Coast. Lone
J .� .T
PinePublishing. 528 pp. Vancouver,British Columbia.
Speare-Cooke, S., 1997. A Field Guide to the Common Wetland Plants of
Western Washington and Northwestern Oregon. Seattle Audubon Society.
417 pp.
US Department of Agriculture, Soil Conservation Service. Soil Survey of Pierce
County Area, Washington. September, 1977.
US Fish and Wildlife Service. National Wetlands Inventory. 1978.
Washington State Department of Ecology, 1997. Washington State Wetland
Identification and Delineation Manual. Ecology Publication#96-94,
various pagination. Olympia, Washington.
Washington State Department of Ecology, 1993. Washington State Wetlands
Rating System, Western Washington Second Edition. 61 pp.Ecology
Publication#93-74. Olympia,Washington.
Washington State Department of Ecology, 1999. Methods for Assessing
Wetland Functions for Reverine and Depressional Wetlands in the
Lowlands of Western Washington. Ecology Publication#99-115. Olympia,
Washington.
United States Fish and Wildlife Service, 1993..National List of Plant Species that
Occur in Wetlands Region 9—Northwest. Resource Management Group
PO Box 2854 Belfair,Washington 98528-Cell Phone 360-620-0618 -wetlandcorps@hotmail.com
APPENDIX A
Routine Wetland Determination Data Forms
4 r
EST DRY^: I
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Approximate Parcel i r
Location
w u, If........� : .. 1162
FIGURE 1 VICINITY MAP
Project Name: Hoyt Wetland Del.
Location: Allyn,Washington
Project: TWC13-W35
Client: Leslie Hoyt
TFH WETLAND CORPS Date: 8/13
0 400' .
1
tj
t
Hwy
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Existing Road Grade
t411
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1U^1tegery III Wethnd
60' buffer + 15' building m y
setback
60' a�� ! �R.110' t t
r �` t Wetland A
t Category III Wetland
110' buffer + 15'
building setback
FIGURE 2. SITE MAP
Project Name: Hoyt Wetland Del.
Location: Allyn,Washington
TIH WETLAND CO"S Project: TWC13-W35
Client: Leslie Hoyt
��F� Date: 8/13
I
fl
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A roximate
parcel
location
Loaner AS i`&,Va d Polygons � � � � �� �r .,.V ,7 .<.,o
Est#m Ink AC;d Mar rt*O Yi'014nd
Fresharatra Forte tedls mils i elUnt7 k ,�', a "� _" •a .
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Figure adapted from NWI Figure 3 National Wetland Inventory Map
Section 31 Township 22 North Range 1 West
Mapper website i;
FIGURE 3.NWI MLAP
Project Name: Hoyt Wetland Del.
Location: Allyn,Washington
Project: TWC13-W35
Client: Leslie Hoyt
Date: 8/13
TBI WIETLANDCn S Note: One wetland mapped in project vicinity.
t a g d �
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Sy
l
����" ��6 ' .���:, ,.Approximate
Parcel Location
Onsite Soil Conditions based on Mason County Soil Survey
Subject Site Soils:
Ab-Alderwood gravelly sandy loam, 5 to 15 percent slopes. The Alderwood series consists of brown, well-drained, upland
soils. They have developed from mixed gravelly glacial till dominated by acid igneous rock. The imbedded gravel is mainly
granite and quartzite. Rainfall is 45 to 60 inches a year. The native vegetation is a dense forest consisting almost entirely of
Douglas-fir and a dense understory of salal, Oregon-grape, vine maple, and huckleberry. Northeast of the Hood Canal the
understory is mainly rhododendron.Alderwood soils occupy the extensive rolling glacial moraines; and they are the dominant
soils in the eastern part of the county. The Alderwood soils are associated with the somewhat excessively drained Everett and
Indianola soils and with the moderately well drained Kitsap soils. The Alderwood gravelly sandy loam, 5 to 15 percent slopes
(Ab)is the most extensive,soil of the Alderwood series.It occupies undulating to rolling moraines. Alderwood gravelly sandy
loam, 15 to 30 percent slopes (Ac).-This soil varies more in depth, but otherwise it is similar to Alderwood gravelly sandy
loams,5 to 15 percent slopes.
(U).-.Bellingham silt loam, 0 to 3 percent slopes This soil is found on upland depressions and glacial-like basins. They
developed from glacial materials,and are a very poorly drained,silty soil. The soil is medium acid and high in organic matter.
The surface soil is up to 10 inches deep, and contains much organic matter and many small roots. Bellingham is associated
with Kitsap soils. The soil is wet and swampy if not drained. The clay is hard when dry,plastic when wet, and firm when
moist. This soil is in capability subclass IVw. This soil is listed Mason County's hydric soils list. A more detailed soil
description can be found in Appendix B Mason Soil Survey Text.
FIGURE 4 SOIL SURVEY
Project Name: Hoyt Wetland Del.
Location: Allyn,Washington
Project: TWC13-W35
Client: Leslie Ifloyt
_ME V\7.ET _ �''`� Date: 8/13
Mote: Hydrie soils present in project
vicinity.
Approximate •
7 F86 parcel 1704680 04 L'f 14
location 34684
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'+704 ' 1704 417046 1' 170 4 466
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H-,-L is Soils
'EEAIw Higlxl. 'ntati T12NSY;?RT. TIt)N
High1v E:c6ble F
,. st'•l' lU'.t-3Tet•T' .a I__ i 3_. .CLi�.
H s'y *r u.i".'I It
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. No Data or Grovel*•?1-?i„
,'� � ,�f'Ri�ail{Sucfai e i Tltl ttut�rt:�
w„r Stream':-afrr T;np .-:•� l e ..:c1�
• t:)rpltaltecl Ri)ai:l
Trail
FIGURE 5.DNR STREAM.MAP
Project Name: Hoyt Wetland Del.
Location: Allyn,Washington
Project: TWC13-W35
Client: Leslie Hoyt
THE WETL_-5LND COR Date: 8/13Note: No streams mapped within
approximate parcel location.
APPENDIX B
Soil Survey Text
ALDERWOOD SERIES
The Alderwood series consists of brown, well-drained, upland soils. They have
developed from mixed gravelly glacial till dominated by acid igneous rock. The
imbedded gravel is mainly granite and quartzite. Rainfall is 45 to 60 inches a year. The
native vegetation is a dense forest consisting almost entirely of Douglas-fir and a dense
understory of salal, Oregon-grape, vine maple, and huckleberry. Northeast of the Hood
Canal the understory is mainly rhododendron. Alderwood soils occupy the extensive
rolling glacial moraines, and they are the dominant soils in the eastern part of the county.
The Alderwood soils are associated with the somewhat excessively drained Everett and
Indianola soils and with the moderately well drained Kitsap soils. Shelton and Hoodsport
soils differ from the Alderwood soils in that they have developed under high rainfall and
from glacial till having a much higher content of basic igneous rock. The Shelton and
Hoodsport soils are more reddish throughout the profile. The Shelton soils are usually
deeper to the cemented till than the Alderwood soils.
Alderwood gravelly sandy loam, 5 to 15 percent slopes (Ab).-This is the most
extensive, soil of the Alderwood. series. It occupies undulating to rolling moraines. In
undisturbed areas a 1- to 2-inch mat of very dark brown, acid organic matter is on the
surface. This grades to a thin, dark grayish-brown, highly organic mineral soil. The
surface soil consists of a friable,brown, medium acid gravelly sandy loam 8 to 13 inches
deep. It has a weak granular structure and contains numerous rounded shot. Below the
surface soil, to depths ranging from 18 to 24 inches, is a pale-brown gravelly sandy loam
that is very friable, is single grained; and contains small to moderate amounts of shot .
Between this layer and the cemented till is a 3- to 10-inch layer of very pale brown
gravelly sandy loam. It contains no shot and is firmer but has the same texture as the
layer above. However, it is faintly to distinctly spotted and horizontally streaked with
brown and yellow. The cemented till consists of light-gray, gravelly sandy loam, and it
normally occurs at depths ranging from 24 to 32 inches. It is impermeable to roots and
very slowly permeable to water. The first few inches is usually laminated and streaked
with reddish brown and yellow. Below this, to a depth of many feet, the till is uniformly
cemented, fairly uniform light gray, and medium to strongly acid. A thin mat of roots
often lies over the till.. The cemented substratum tends to restrict the rapid downward
movement of moisture. Use and suitability.-Not more than about 5 percent of this soil has
been cleared and is used for crops or pasture. Most of the cultivated acreage is near the
inlets of Puget Sound in the vicinities of Arcadia and Allyn. In this area the Alderwood
soils are associated with the better agricultural soils of the Cloquallum, Sinclair and
Kitsap series. Hay, small grains, pasture, fruits, nuts, grapes, and berries are the principal.
crops grown on the Alderwood soils. The lack of subsoil moisture damages crops in
summer. For this reason, early maturing, short-season crops are suited best to this soil.
Yields of all crops are usually fairly low because of low fertility and the dry summers.
Pastures produce good forage in spring and late in fall if proper plants are used and
management is good. The deeper soils are suited best to fruits, nuts, and grapes. The
uncleared and remote areas are better suited to forestry than to cultivated crops. Nearly
all the uncleared acreage is in second-growth forest 70 to 80 years of age. Shallowness to
the compact till often inhibits growth of the older trees. The soil, however, is well suited
to production of Christmas trees. Douglas-fir readily restocks in thick stands containing
trees of good form. Stands of small trees are often thinned and pruned to maintain good
form of growth. The growing of Christmas trees has expanded rapidly in the past few
years and is now one of the important industries in the county. It is one of the proper uses
of the cutover lands that are not in a high site class. Alder-wood soils need barnyard
manure, green manure, nitrogen, or legumes to maintain a fertility for crop production.
Phosphate fertilizers and green manure or barnyard manure greatly improve fertility.
Nitrogen fertilizer is often applied with barnyard manure or when cover crops are plowed
under. The fertilizer furnishes additional nitrogen needed to hasten decay of the organic
matter. This soil is in capability subclass VIs and in site classes 4 and 5 for Douglas-fir.
Small areas along- the border, where the soil is more than 32 inches deep to compact till,
are in site classes 3 and 4 for Douglas-fir.
BELLINGHAM SERIES
The Bellingham series consists of poorly drained,very dark gray silty soils. They occupy
upland depressions and glacial like basins. They have developed from glacial materials
under rainfall ranging from 4 to 60 inches per year. The native vegetation is a dense
forest of alder, maple, willow, cedar, and an occasional spruce and aspen. Under the
forest is spirea and a dense growth of wild rose, sedges, and watertolerant grasses and
shrubs. Bellingham soils are medium acid and high in organic matter. They are associated
with the Kitsap and Cloquallum.soils and with other glacial soils of the uplands.
Bellingham silt loam,0 to 3 percent slopes(Bd).-This soil is widely distributed over the
eastern part of the county and is associated with the Cloquallum soils. On the islands of
Case Inlet and Pickering Passage and bordering the mainland, it is associated with the
Kitsap soils. The surface soil is a granular and friable, very dark gray silt loam, 6 to 10
inches thick. It contains much organic matter and many small roots. When moist, it is
nearly black, and in many places it is covered by a thin peaty layer. Under the surface soil
is a plastic silt loam or silty clay loam, 4 to 8 inches thick. This laver contains fewer roots
and less organic matter than the layer above it. At depths ranging front 10 to 16 inches,
the silt loam or silty clay loam grades sharply to a lightgray clay mottled with yellow,
brownish yellow, and rust brown. The clay is hard when dry, plastic when wet, and firm
when moist. It breaks into fine aggregates of subangular shape. From a depth of 24 to
30 inches and down to 48 to 72 inches,the substratum is lightgray to dark-gray silt loam,
clay, or sandy clay. This material is faintly mottled with yellowish brown to bluish gray
and is very plastic, dense, and massive. Below depths of 48 to 72 inches, the substratum
rests on glacial lake sediments or drift. Areas of this Bellingham soil joining areas of
Cloquallum or Kitsap soils have a lighter colored surface soil and a less distinctly mottled
subsoil. In many places the transition from this soil to Cloquallum or Kitsap soils is
gradual. The soil is wet and swampy if not drained. Dense clay in the subsoil prevents the
use of tide for drainage, but excess surface water can be removed by using regularly
spaced ditches in fields and at the bases of slopes. Use and suitability.-When adequately
drained, this soil is suited to hay, pasture, oats, and truck crops. It is moderately fertile
and productive and retains moisture well in summer. Yields depend on adequate drainage
as well as on seasonal moisture. Excessive rain late in spring or early in summer causes
crops to fail. Hay and oats are the main crops. Truck crops are not grown extensively
because of the distance to market. Permanent pastures can be grazed well into the
summer and, in many seasons, all summer long. This soil is not suited to fiuits, nuts, or
grapes. A few plantings of blueberries have been made, although they are not suited to
this fine-textured soil. Blackberries grow well, but the soil is too wet for the other kinds
of berries. Reed canarygrass is suited to areas that are difficult to drain. Ordinarily,
fertilizer other than barnyard manure is not used. Most crops benefit when manure treated
with phosphate is applied. Truck crops receive a complete fertilizer. Lime is rarely used
on crops. This soil is in capability subclass lVw; it is fair for red alder, Oregon-maple,
willow,hemlock,spruce, and redcedar.
Washington State Wetland Rating; System Form
• WETLAND RATING FORM -WESTERN WASHINGTON
Name of wetland(if known): Hoyt Wetland A _.._..__.�
Location: SEC: 31 TWNSHP:22N_ RNGE:I W_ (attach map with outline of wetland to rating form)
Person(s) Rating Wetland: H. Lane Affiliation: TWC Date of site visit: 8/21/13
SUMMARY OF RATING
Category based on FUNCTIONS provided by wetland
l II III X IV
Category I= Score> 70 Score for Water Quality Functions 13
Category II= Score 51 -69 Score for Hydrologic Functions 8
Category III= Score 30-50 Score for Habitat Functions 20
Category.IV= Score<30 TOTAL Score for Functions 41
Category based on SPECIAL CHARACTERISTCS of Wetland
I. 11 Does not apply X
Final Category(choose the "highest"category from above") ltt
Check the appropriate type and class of wetland being rated.
_ Wetland Type Wetland Class
Estuarine De ressional x
Natural Heritage Wetland Riverine
-Bog Lake-fringe
Mature Forest Slope
Old Growth Forest Flats
Coastal Lagoon Freshwater Tidal
Interdunal
None of the above X
Does the wetland 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 Need Special Protection, YES NO
and That are Not Included in the Rating
SPI. Has the wetland been documented as a habitat.for any Federally listed Threatened or
Endangered plant or animal species (TIE species)? x
For the purposes of this rating system, "documented" means the wetland is on the appropriate
state or federal database.
SP2. Has the wetland been documented as habitat for any State listed Threatened or Endangered
plant or animal species? For the purposes of this rating.system, "documented"means the x
wetland is on the appropriate state database.
SP3. Does the wetland contain individuals of Priority species listed by the WDFW or the state? x
SP4. Does the wetland have a local significance in addition to its functions? For example,the
lin Master Program, the Critical Areas Ordinance
wetland has been identified in the Shoreline rite gr ,or X
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 eg omorphic Class of the wetland beingrated.
ated.
The hydrogeomorphic classification groups wetlands in to 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 RNtino Form—weonm Washinntnn N 1/04) Page 1 of R
Classification of Vegetated Wetlands for Western Washington
Wetland Name: Hagen Wetland A Date: 4/2/08
1. Are the water levels in the wetland usually controlled by tides(i.e. except during floods)?
NO - go to 2 YES—the wetland class is Tidal Fringe
If yes, is 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 a
Saltwater Tidal Fringe it is rated as an Estuarine wetland Wetlands that were call 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 1 and II estuarine wetlands have changed(see p. _).
2. Is the topography within the wetland flat and precipitation is only source(>90%)of water to it.
NO—go to 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 wetland meet both of the following criteria?
The vegetated part of the wetland is on the shores of a body of open water(without any vegetation on the
surface) where at least 20 acres(8ha)are permanently inundated(ponded or flooded);
_ At least 30%of the open water area is deeper than 6.6(2 m)?
NO--go to 4 YES—The wetland class is Lake-fringe(Lacustrine Fringe)
4. Does the wetland 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 types of wetlands except occasionally in very small and
shallow depressions or behind hummocks (depressions are usually<3 ft diameter and less than I foot deep).
NO- go to 5 YES—The wetland class is Slope
5. Is the wetland in a valley, or stream channel,where it gets inundated by overbank flooding from that stream or river? The
flooding should occur at least once every two years,on the average,to answer"yes". The wetland can contain
depressions that are filled with water when the river is not flooding.
NO—go to YES—The wetland class is Riverine
6. Is the wetland in a topographic depression in which water ponds, or is saturated to the surface,at some time of the year.
This means that any outlet, if present is higher than the interior of the wetland.
NO—go to 7 YES The wetland class is Depressional
7. Is the wetland located in a very flat area with no obvious depressional and no stream or river running through it and
providing water. The wetland seems to be maintained by high groundwater in the area. The wetland may be ditched, but
has no obvious natural outlet.
No—go to 8 YES—The wetland class is Depressional
8. Your wetland seems to be difficult to classify. 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. Sometimes we find
characteristics of several different hydrogeomorphic classes within one wetland boundary. 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 being rated. If the area of the second class is less than 10%classify the wetland using the first class.
HG?vf Classes Within a Delineated Wetland Boundary Class to Use in Rating
Slope+Riverine Riverine
Sloe +Depressional Depressional.
Slope+ Lake-fringe Lake-fringe
Depressional + Riverine along stream within boundary Depressional
Depressional + Lake-fringe Depressional
Salt Water Tidal Fringe and any other class of Treat as ESTUARINE under wetlands with special
freshwater wetland characteristics
If you are unable still to determine which of the above criteria apply to your wetland, or you have more than 2 HG.M classes
within a wetland boundary, classify the wetland as Depressional for the rating.
Wetland Rating Form—western Washington 01/04) Pace 2 of 8
D Depressional and Flat Wetlands i Points
WATER QUALITY FUNCTIONS—Indicators that wetland functions to improve water quality.
D 1 Does the wetland have the R2 ential to improve water quality? (see p.38)
D 1.1. Characteristics of surface water flows out of the wetland:
• Wetland is a depression with no surface water outlet............................................................points=3
• Wetland has an intermittently flowing,or highly constricted, outlet......................................points=2 2
• Wetland has an unconstricted surface outlet.........................................................................points= I
• Wetland is flat and has no obvious outlet and/or outlet is a ditch..........................................points= 1
D 1.2 The soil 2 inches below the surface is clay,organic,or smells anoxic(hydrogen sulfide or rotten eggs). 4
YES points=4 NO points=0
D 1.3 Characteristics of persistent vegetation(emergent, shrub,and/or forest class):
• Wetland has persistent, ungrazed vegetation>=95%of area...............................................points=5 5
• Wetland has persistent,ungrazed vegetation>= %Z of area...................................................points=3
• Wetland has persistent,ungrazed vegetation>= 1/10 of area...............................................points=.1
• Wetland has persistent, ungrazed vegetation < 1/10 of area..................................................points=0
D 1.4 Characteristics of seasonal ponding or inundation: T is is t e area of the vvethind that is pon ed�for at
least 2 months, but dries out sometime during the year. Do not count the area that is ermanenuy
ponded. Estimate area as the average condition 5 out of.10 years. NOTE: See text f r indicators of
seasonal and permanent inundation. 2
• Area seasonally ponded is> 1/2 total area of wetland...........................................................points=4
• Area seasonally ponded is> 1/4 total area of wetland...........................................................points=2
• Area seasonally ponded is<1/4 total area of wetland...........................................................points=0
Totals for D 1 Add the points in the boxes above 13
D 2 Does the wetland have the opportunity to improve water quality? (see p. 44)
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 dotivngradient
from the wetland? Note which of the following conditions provide the sources of pollutants.
Grazing in the wetland or within 150 ft
_ Untreated stormwater discharges to wetland
_ Tilled fields or orchards within 150 ft. of wetland
A stream or culvert discharges into wetland that drains developed areas,residential areas, farmed
fields,roads,or clear-cut logging
Residential,urban areas,golf courses are within 150 ft.of wetland Multiplier
_ Wetland is fed by groundwater high in phosphorus or nitrogen
Other 1
YES multiplier is 2 NO multiplier is I
♦ TOTAL—Water Quality Functions Multiply the score from D1 by D2;then add score to table on p. I 13
HYDROLOGIC FUNCTIONS—Indicators that wetland functions to reduce flooding and stream degradation.
D 3 Does the wetland have the potential to reduce flooding and erosion? (see p.46)
D 3.1 Characteristics of surface water flows out of the wetland:
• Wetland has no surface water outlet.....................................................................................points =4
• Wetland has an intermittently flowing,or highly constricted,outlet......................................points=2 2
• Wetland is flat and has no obvious outlet and/or outlet is a small ditch.................................points= t
• Wetland has an unconstricted surface outlet.........................................................................points=0
D 3.2 Depth of storage during wet periods. Estimate the height of ponding above the bottom of the outlet.
• Marks of ponding are 3 ft. or more above the surface...........................................................points=7
• The wetland is a"headwater wetland"............................................. ............................points=5
• Marks of ponding between 2 ft.to<3 ft.from surface.........................................................points=5 3
• Marks are at least 0.5 ft. to<2 ft.from surface....................................................................points=3
• Wetland is flat but has small depressions on the surface that trap water.................................points= l
• Marks of ponding less than 0.5 ft.......................................................................................... oints=0
D 3.3 ontribution o wetland to storage in the watershed: Estimate the ratio o upstream asin contributing
surface water to the wetland to the area of the wetland itself.
• The area of the basin is less than 10 times the are of wetland................................................points=5 3
• The area of the basin is 10 to 100 times the area of the wetland............................................points =3 `
• The area of the basin is more than 100 times the area of the wetland....................................points=0
Wetland is in the FLATS class basin=the wetland, by definition ......................................points=5
Total for D 3 Add the points in the boxes above 8
D 4 Does the wetland have the opportunity to reduce flooding and erosion? (see p. 49)
Answer YES if the wetland is in a location in the watershed where the flood.storage,or reduction in water
velocity,it provides helps protect downstream property and aquatic resources from flooding or excessive and/or
erosive flows. Answer NO if the water coming into the wetland is controlled by a structure such as flood gate,
tide gate,flap valve,reservoir etc.OR you estimate that more than 90%of the water in the wetland is from
groundwater. _Note which of'the following indicators of opportunity apply.
Wetland is in a headwater of a river or stream that has flooding problems.
Wetland drains to a river or stream that has flooding problems
Wetland has no outlet and impounds surface runoff water that might otherwise flow into a river or Multiplier
stream that has flooding problems
Other 1
YES multiplier is 2 NO multiplier is 1
♦ TOTAL—Hydrologic Functions Multi Ely the score from D3 by D4;then add score to table on .A 8
Wetland Ratine Form—v estern Washington 01/04) Paee 3 of
These questions apple to wetlands of all11GAf classes. Points
HABITAT FUNCTIONS— Indicators that wetland functions to provide important habitat.
H 1 Does the wetland have the potential to provide habitat for many species?
H 1.1 Vegetation structure(see P. 73):
Check the types of vegetation classes present(as defined by Cowardin) if the class eoi,ers more than
10%of the area of the wetland or 114 acre.
Aquatic Bed
X Emergent plants
X Scrub/shrub(areas where shrubs have>30%cover) 3
X Forested(areas where trees have>30%cover)
X Forested areas have 3 out of 5 strata(canopy,sub-canopy,shrubs,herbaceous, moss/ground-cover
Add the number of vegetation types that qualify. If you have:
4 types or more...points=4 3 types ..points=2
2 types................points= 1 l type....points=0
H 1.2 Hydro periods (see p.74):
Check the types of water regimes(hydroperiods)present within the wetland The water regime has to
cover more than 10%of the wetland or 114 acre to count(see text for descriptions of hydroperiods).
Permanently flooded or inundated
X I Seasonally flooded or inundated 4 or more types present.....points=3
X Occasionally flooded or inundated 3 types present..................points=2 1
_ Saturated only 2 types present..................points= 1
_ 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
_ Freshwater tidal wetland..........=2 points
H 1.3 Richness of Plant Species(seep. 76):
Count the number of plant species in the wetland that cover at least 10 ftZ(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 ca►rarygrass,purple
loosestrife, Canadian Thistle. If you counted: > 19 species.......................points=2
5— 19 species....................points= 1 1
List species below(optional): <5 species.........................points=0
H. 1..4 Interspersion of Habitats (see p. 77):
Decided from the diagrams below whether interspersion between types of vegetation(described in
H I A),or vegetation types and unvegetated areas(can include open water or mudflats)is high,medium,
low,or none.
("�:) ( D
(*) (:4)
None =0 points 1.,ow= I point Moderate=2 points
r
3
(riparian braided chwine.ls]
High 3 points
Note: If you have 4 or more vegetation types or 3 vegetation types and open water,the rating is always
"high".
H 1.5 Special Habitat Features (seep. 78):
Check the habitat features that are present in the wetland. The number of checks is the number of point
you put into the next column.
X Large,downed,woody debris within the wetland >4 in.diameter and 6 ft. long)
X 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 4
3.3 ft.(lm)over a stream for at least 33 ft. (10m)
_ Stable steep banks of fine material that might be used by beaver or muskrat for denning
(>30 degree slope)OR signs of recent beaver activity are present
X At least 1/4 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)
X Invasive plants cover less than 25%of the wetland area in each stratum of plants
H 1 TOTAL Score— otential for providing habitat Add the oints in the column above 12
Wetland Rating Form—western Washington 01/04) Page 4 of 8
H 2 Does the wetland have the oaaortunity to provide habitat for many species?
H 2.1 Buffers (see P. 81):
Choose the description that best represents condition of buffer of wetland. The highest scoring criterion
that applies to the ivetland is to be used in the rating. See text for definition of"undisturbed".
100m(330 ft)of relatively undisturbed vegetated areas,rocky areas,or open water
>95%of circumference. No developed areas within undisturbed part of buffer
(relatively undisturbed also means no grazing)..........................................................points=5
100m(330 ft)of relatively undisturbed vegetated areas,rocky areas,or open water
> 50%circumference....................................................................................................points=4
50m(170 ft)of relatively undisturbed vegetated areas,rocky areas,or open water
>95%circumference....................................................................................................points=4
100m.(330 ft)of relatively undisturbed vegetated areas,rocky areas,or open water
>25%circumference....................................................................................................points=3 3
X 50m(170 ft)of relatively undisturbed vegetated areas,rocky areas,or open water
for>50%circumference...............................................................................................points=3
If buffer does not meet any of the three criteria above:
No paved areas(except paved trails)or buildings within 25m(80 ft)of wetland>
95%circumference. Light to moderate grazing or lawns are OK...................................points=2
_ No paved areas of buildings within 50m of wetland for>50%circumference.
Light to moderate grazing or lawns are OK...................................................................points=2
i
Heavy grazing in buffer.................................................................................................points= 1.
Vegetated buffers are<2m wide(6.6 ft)for more than 95%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
H 2.2 Corridors and Connections(seep. 82)
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 a 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 1
or upland)that is at least 50 ft.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=go to 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 miles of a large field or pasture(>40 acres)OR YES= 1 point
• Within 1 mile of a lake greater than 20 acres? NO=0 points
Wetland Rating Form-western Washington(11/04) Paee 5 of 8
H 2.3 Near or adjacent to other priority habitats listed by WDFW(see p. 83):
Which of the following priority habitats are within 330 ft.(100m)of the wetland?
(See text for a more detailed description of these priority habitats.)
X 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 7.6m(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)>81em
(32 in)dbh or>200 years of age.
_ Mature forests: Stands with average diameters exceeding 53cm(21 in)dbh;crown cover may be
less than 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 greases
and/or forbs form the natural climax plant community.
Talus: Homogenous areas of rock rubble ranging in average size 0.15—2.Om(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 1
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-cnclosed
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 0.5 ppt.during the period of average annual low flow.
Includes both estuaries and.lagoons.
_ 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 1 priority habit...= 1 point
If wetland has 2 priority habitats =3 points No habitats =0 points
H 2.4 Wetland Landscape: Choose the one description of'the landscape around the ►vetland that best fits
(seep. 85)
• There are at least 3 other wetlands within 1/2 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 =p .......................................................................................................................points 5
• The wetland is Lake-fringe on a lake with little disturbance and there are 3 other lake-fringe
wetlands within 1/2 mile............... = 3
......................................................................................points 5
• There are at least 3 other wetlands within 1/2 mile,BUT the connections between them are
disturbed.............................................................................................................................points=3
• The wetland fringe on a lake with disturbance and there are 3 other lake-fringe wetlands
within1/2 mile....................................................................................................................points=3
• There is at least I wetland within 1/2 mile...........................................................................points=2
• There are no wetlands within 1/2 mile.................................................................................points=0
H 2 TOTAL Score—opportunity for providing habitat Add the scores in the columns above 4
♦ Total Score for Habitat.Functions Add the points for H 1 and H 2;then record the result on p. 1 20
Wetland Ratine Form—western Washineton N 1/04) Paee 6 of 8
CATEGORIZATION BASED ON SPECIAL CHARACTERISTICS
Please determine if the wetland meets the attributes described below
and circle the appropriate answers and Category.
Wetland Type--Check off any criteria that apply to the wetland. Circle the Category when the appropriate
criteria are met.
C1 Estuarine wetlands? (see p.87)
Does the wetland 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 X
SC 1.1 Is the wetland within a National Wildlife Refuge,National Park,National Estuary Reserve,Natural Area
Preserve,State Park or Educational, Environmental,or Scientific Reserve designated under WAC 332-
30-151? Cat. I
YES =Category 1 NO=go to SC 1.2
SC 1.2 Is the wetland at least 1 acre in size and meets at least two of the following conditions?
YES =Category I NO=Category 11 Cat.I
The wetland is relatively undisturbed(has no diking,ditching,filling,cultivation,grazing,and has
less than 1.0%cover of non-native plant species. If the non-native Spartina spp,. are only species
that cover more than 10%of the wetland,then the wetland should be given a dual rating(1/11). Cat. 11
The area of Spartina would be rated a Category 11 while the.relatively undisturbed upper marsh
with native species would be a Category 1. Do not,however,exclude the area of Spartina in
determining the size threshold of 1 acre. Dual
At least 314 of the landward edge of the wetland has a 100 ft.buffer of shrub,forest,or un-grazed Rating
or un-mowed grassland 1/11
The wetland has at least 2 of the following features: tidal channels, depressions with open water,
or contiguous freshwater wetlands.
SC2 Natural Heritage Wetlands (see p. 88)
Natural Heritage wetlands have been identified by the Washington Natural heritage 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 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 WNHPIDNR.)
S/T/R information from Appendix D X or accessed from WNHP/DNR web site
YES X_Contact WNHP/DNR(see p. 88)and go to SC 2.2 NO X
SC 2.2 Has DNR identified the wetland as a high quality undisturbed wetland or as a site with state threatened
or endangered plant species? Cat I
YES =Category 1 NO X
C3 Bogs (see p. 88)
Does the wetland(or part of the wetland)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 function.
1. Does the wetland 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 soil profile? (See Appendix B for a field key to
identify organic soils)? YES=go to question 3 NO=go to question 2
2. Does the wetland 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 question 3 NO=is not a bog for purpose of rating
3. Does the wetland 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 question 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 hold 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.
4. 1s the wetland 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 shrub/herbaceous cover)? Cat.I
YES=Category I NO== Is not a bog for purpose of rating
Wetland Ratine Form—western Washington 01/04) Page 7 of 8
SC4 Forested Wetlands (see p. 96)
Does the wetland 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 function.
Old-growth forests: (west of Cascade Crest) Stands of at least two three 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 an average diameters(dbh)exceeding 21 inches(53 cm); crown cover may be less than
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=X
SC5 Wetlands in Coastal Lagoons (veep. 92)
Does the wetland meet all of the following criteria of a wetland in a coastal lagoon?
The wetland lies in a depressional 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 X not a wetland in a coastal lagoon.
SC 5.1 Does the wetland meet 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. 1
The wetland is larger than 1./10 acre(4350 square ft.)
YES=Category I NO =Category 11 Cat. [I
SC6 Interdunal Wetlands (see p. 94)
Is the wetland west of the 1889 line(also called the Western Boundary of Upland Ownership or
WBUO)?
YES=Go to SC 6.1 NO X 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 one acre or larger?
YES=Category II NO =go to SC 6.2 Cat. 11
SC 6.2 Is the wetland between 0.1 and I acre,or is it in a mosaic of wetlands that is between 0.1 and 1 acre?
YES=Category III Cat. III
Category of wetland based on Special Characteristics
Choose the "highest"rating if wetland falls into several categories, and record on p. 1.
If you answered NO for all types enter"Not Applicable"on p. 1
Wetland Rating Form—western Washington(l 1/04) Page 8 of 8
WETLAND RATING FORM—WESTERN WASHINGTON
Name of wetland(if known): Hoyt Wetland B
Location: SEC: 31 TWNSHP:22N_ RNGE:1 W_ (attach map with outline of wetland to rating form)
Person(s) Rating Wetland: H. Lane Affiliation: TWC Date of site visit: 8/21/1.3
SUMMARY OF RATING
Category based on FUNCTIONS provided by wetland
i
I II III x IV
i
Category 1 = Score>70 Score for Water Quality Functions 16
Category it = Score 51 -69 Score for Hydrologic Functions 7
Category III= Score 30—50 Score for Habitat Functions 15
Category IV= Score <30 TOTAL Score for Functions 38
Category based on SPECIAL CHARACTERISTCS of Wetland
I 11 Does not apply X
Fi n a I Category(choose the"highest"category from above") Ill
Check the appropriate type and class of wetland being rated.
Wetland Type Wetland Class
Estuarine De ressional X
Natural Heritage Wetland Riverine
Bog Lake-fringe
Mature Forest slope
Old Growth Forest Flats
Coastal Lagoon Freshwater'Tidal
Interdunal
None of the above X
Does the wetland 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 Need Special Protection, YES NO
and That are Not Included in the Rating
SP1. Has the wetland been documented as a habitat for any Federally listed Threatened or
Endangered plant or animal.species(TIE species)? X
For the purposes of this rating system,"documented"means the wetland is on the appropriate
state or federal database.
SP2. Has the wetland been documented as habitat for any;State listed Threatened or Endangered
plant or animal species? For the purposes of this rating system, "documented".means the X
wetland is on the appropriate state database.
SP3. Does the wetland contain individuals ofPriority species listed by the WDFW or the state? X
SP4. Does the wetland 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 X
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 geomorphic Class of the wetland being rated.
The hydrogeomorphic classification groups wetlands in to 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 Ratine Form—western Washineton(11/04) Paee 1 of 8
Classification of Vegetated Wetlands for Western Washington
Wetland Name: Hagen Wetland B Date: 4/2/08
1. Are the water levels in the wetland usually controlled by tides(i.e. except during floods)?
NO---go to 2 YES—the wetland class is Tidal Fringe
If yes, is 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 a
Saltwater Tidal Fringe it is rated as an Estuarine wetland. Wetlands that were call 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 1 and 11 estuarine wetlands have changed(see p._).
2. Is the topography within the wetland flat and precipitation is only source (>90%) of water to it.
NO go to 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 wetland meet both of the following criteria?
The vegetated part of the wetland is on the shores of a body of open water(without any vegetation on the
surface)where at least 20 acres(8ha) are permanently inundated(ponded or flooded);
At least 30%of the open water area is deeper than 6.6(2 m)?
NO—go to 4 YES—The wetland class is Lake-fringe(Lacustrine Fringe)
4. Does the wetland 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 types of wetlands except occasionally in very small and
shallow depressions or behind hummocks (depressions are usually<3 ft diameter and less than I foot deep).
NO—go to 5 YES—The wetland class is Slope
5. Is the wetland in a valley,or stream channel, where it gets inundated by overbank flooding from that stream or river? The
flooding should occur at least once every two years, on the average,to answer"yes". The wetland can contain
depressions that are filled with water when the river is not flooding.
NO—go to 6 YES—The wetland class is Riverine
6. Is the wetland in a topographic depression in which water ponds,or is saturated to the surface, at some time of the year.
This means that any outlet, if present is higher than the interior of the wetland,
NO—go to 7 YES—The wetland class is Depressional
7. Is the wetland located in a very flat area with no obvious depressional and no stream or river running through it and
providing water. The wetland seems to be maintained by high groundwater in the area. The wetland may be ditched, but
has no obvious natural outlet.
No—go to 8 YES—The wetland class is Depressional
8. Your wetland seems to be difficult to classify. 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. Sometimes we find
characteristics of several different hydrogeomorphic classes within one wetland boundary. 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 being rated. If the area of the second class is less than 10%classify the wetland using the first class.
HCM Classes Within a Delineated Wetland Boundary Class to Use in Rating
Slope+ Riverine Riverine
Slope+Depressional Depressional
Slope + Lake-fringe Lake-fringe
Depressional.+ Riverine along stream within boundary Depressional
Depressional+ Lake-fringe Depression I
Salt Water Tidal Fringe and any other class of Treat as ESTUARINE under wetlands with special
freshwater wetland characteristics
if you are unable still to determine which of the above criteria apply to your wetland, or you have more than 2 HGM classes
within a wetland boundary, classify the wetland as Depressional for the rating.
Wetland Rating Form—western Washington(11/04) Page 2 of 8
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D Depression{al and Flat Wetlands Points
WATER QUALITY FUNCTIONS—Indicators that wetland functions to improve water quality.
D I Does the wetland have the potential to improve water quality? (see p.38)
D 1.1 Characteristics of surface water flows out of the wetland:
• Wetland is a depression with no surface water outlet............................................................points=3
• Wetland has an intermittently flowing, or highly constricted,outlet......................................points=2 3
• Wetland has an unconstricted surface outlet.........................................................................points= 1
• Wetland is flat and has no obvious outlet and/or outlet is a ditch..........................................points_ 1
D 1.2 The soil 2 inches below the surface is clay,organic,or smells anoxic(hydrogen sulfide or rotten eggs). 4
YES points=4 NO points=0
D 1.3 Characteristics of persistent vegetation(emergent,shrub,and/or forest class):
• Wetland has persistent, ungrazed vegetation>=95%of area...............................................points=5 5
• Wetland has persistent, ungrazed vegetation>=%2 of area..............I...I................................points=3
• Wetland has persistent,ungrazed vegetation>= 1/1.0 of area...............................................points= 1
. Wetland has persistent,ungrazed vegetation< 1/10 of area..................................................points=0
D 1.4 Characteristics of seasonal ponding or inundation: This is the area of the ivetland that is ponded or at
least 2 months, but dries out sometime during the year. Do not count the area that is ermanent y
ponded. Estimate area as the average condition 5 out of 10 years. NOTE: See text7r indicators of
seasonal and permanent inundation. 4
• Area seasonally ponded is> 1/2 total area of wetland...........................................................points=4
• Area seasonally ponded is> 1/4 total area of wetland...........................................................points=2
• Area seasonally ponded is < 1/4 total area of wetland...........................................................points=0
Total for D 1 Add the points in the boxes above 16
D 2 Does the wetland have the opportunity to improve water quality? (see p. 44)
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.
_ Grazing in the wetland or within 150 ft
Untreated stormwater discharges to wetland
Tilled fields or orchards within 150 ft.of wetland
_ A stream or culvert discharges into wetland that drains developed areas,residential areas, farmed
fields, roads,or clear-cut logging
_ Residential,urban areas,golf courses are within 150 ft.of wetland Multiplier
_ Wetland is fed by groundwater high in phosphorus or nitrogen
_ Other 1
YES multiplier is 2 NO multiplier is 1
♦ TOTAL—Water Quality Functions Multi I the score from D'I by D2; then add score to table on p. 11 16
HYDROLOGIC FUNCTIONS—indicators that wetland functions to reduce flooding and stream degradation.
D 3 Does the wetland have the potential to reduce flooding and erosion? (see p.46)
D 3.1 Characteristics of surface water flows out of the wetland:
• Wetland has no surface water outlet.....................................................................................points=4
• Wetland.has an intermittently flowing,or highly constricted,outlet......................................points=2 4
• Wetland is flat and has no obvious outlet and/or outlet is a small ditch.................................points= 1
• Wetland has an unconstricted surface outlet.........................................................................points=0
D 3.2 Depth of storage during wet periods. Estimate the height of ponding above the bottom of the outlet.
• Marks of ponding are 3 ft. or more above the surface...........................................................points=7
• The wetland is a"headwater wetland"..................................................................................points=5
• Marks of ponding between 2 ft.to<3 ft.from surface.........................................................points=5 0
• Marks are at least 0.5 ft. to<2 ft. from surface....................................................................points=3
• Wetland is flat but has small depressions on the surface that trap water................................points= 1
. Marks of pondingless than 0.5 ft..........................................................................................points=0
D 3.3 Contribution of wetland to storage tot the watershed: Estimate the ratio of upstream basin contributing
surface water to the wetland to the area of the wetland itself.
• The area of the basin is less than 10 times the are of wetland................................................points=5 3
• The area of the basin is 10 to 100 times the area of the wetland............................................points=3
• The area of the basin is more than 100 times the area of the wetland....................................points=0
• Wetland is in the FLATS class basin=the wetland by definition ......................................points=5
Total for D 3 Add the points in the boxes above 7
D 4 Does the wetland have the opportunity to reduce flooding and erosion? (seep. 49)
Answer YES if the wetland is in a location in the watershed where the flood storage,or reduction in water
velocity,it provides helps protect downstream property and aquatic resources from flooding or excessive and/or
erosive flows. Answer NO if the water coming into the wetland is controlled by a structure such as flood gate,
tide gate,flap valve,reservoir etc.OR you estimate that more than 90%of the water in the wetland is from
groundwater. Note which of the following indicators of opportunity apply.
_ Wetland is in a headwater of a river or stream that has flooding problems.
— Wetland drains to a river or stream that has flooding problems
_ Wetland has no outlet and impounds surface runoff water that might otherwise flow into a river or Multiplier
stream that has flooding problems
_ Other 1
YES multiplier is 2 NO multiplier is 1
♦ TOTAL—Hydrologic Functions Multiply the score from D3 by 134;then add score to table on p. 1 7
Wetland Rating Form—western Washington t11/041 Page 3 of 9
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These questions apply to wetlands of all HGN1 classes. Points
HABITAT FUNCTIONS-hidicators that wetland functions to provide important habitat.
H 1 Does the wetland have the potential to provide habitat for many species?
H 1.1 Vegetation structure (see P. 73):
Check the types of vegetation classes present(as defined by Cowardin) if the class covers more than
10%of the area of the wetland or 114 acre.
Aquatic Bed
X Emergent plants
X Scrub/shrub(areas where shrubs have>30%cover) 1
Forested(areas where trees have>30%cover)
Forested areas have 3 out of 5 strata(canopy,sub-canopy, shrubs, herbaceous,moss/ground-cover
Add the number of vegetation types that qualify. If you have:
4 types or more...points=4 3 types..points=2
2 types................points= 1 1 e....points=0
H 1.2 Hydro periods (see p.74):
Check the types of water regimes (hydroperiods)present within the wetland The water regime has to
cover more than 10%of the welland or 114 acre to count(see text for descriptions of hydroperiods).
Permanently flooded or inundated
X Seasonally flooded or inundated 4 or more types present.....points=3
X Occasionally flooded or inundated 3 types present..................points=2 1
Saturated only 2 types present..................points= IPermanently flowing stream or river in,or adjacent to,the wetland
Seasonally flowing stream in,or adjacent to,the wetland
Lake-fringe wetland.................=2 points
Freshwater tidal wetland..........=2 points
H 1.3 Richness of Plant Species (seep. 76):
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
5 -19 species....................points= 1 0
List species below(optional): <5 species.........................points=0
H 1.4 Interspersion of Habitats(seep. 77):
Decided from the diagrams below whether interspersion between types of vegetation(described in
141.1),or vegetation types and unvegetated areas(can include open water or mudflats)is high, medium,
low,or none.
(:0D
None=0 points Low= I paint Moderate-^}points
09
r a v,rian braided channels
High -3 paints
Note: If you have 4 or more vegetation types or 3 vegetation types and open water,the rating is always
"high".
H 1.5 Special Habitat Features(seep. 78):
Check the habitat features that are present in the welland. The number orchecks is the number of points
you put into the next column.
X Large:downed,woody debris within the wetland(>4 in.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 2
1 33 ft. ( m)over a stream for at least 33 ft.(lOm)
Stable steep banks of tine material that might be used by beaver or muskrat for denning
(> 30 degree slope)OR signs of recent beaver activity are present
At least 1/4 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)
X Invasive plants cover less than 25%of the wetland area in each stratum of plants
H 1 TOTAL Score-potential for providing habitat Add the Eoints in the column above 6
Wetland Rating Form—western Washington N 1/04) Pace 4 of 8
H 2 Does the wetland have the oauortunity to provide habitat for many species?
H 2.1 Buffers (see P. 81):
Choose the description that best represents condition of buffer of wetland. The highest scoring criterion
that applies to the wetland is to be used in the rating. See text for definition of"undisturbed".
X 100m(330 ft)of relatively undisturbed vegetated areas,rocky areas,or open water
>95%of circumference. No developed areas within undisturbed part of buffer
(relatively undisturbed also means no grazing)..........................................................points=5
100m(330 ft)of relatively undisturbed vegetated areas,rocky areas,or open water
>50%circumference....................................................................................................points=4
_ 50m(170 ft)of relatively undisturbed vegetated areas,rocky areas,or open water
>95%circumference....................................................................................................points=4
100m (330 ft)of relatively undisturbed vegetated areas,rocky areas,or open water
>25%circumference....................................................................................................points=3 5
_ 50m(170 ft)of relatively undisturbed vegetated areas,rocky areas,or open water
for>50%circumference...............................................................................................points=3
If buffer does not meet any of the three criteria above:
_ No paved areas (except paved trails)or buildings within 25m(80 ft)of wetland>
95%circumference. Light to moderate grazing or lawns are OK...................................points=2
No paved areas of buildings within 50m of wetland for>50%circumference.
Light to moderate grazing or lawns are OK............. points_
_ Heavy grazing in buffer.................................................................................................points= 1
Vegetated buffers are<2m wide(6.6 ft)for more than 95%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
H 2.2 Corridors and Connections(seep.82)
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 a 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? (Danis 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 1
or upland)that is at least 50 ft. 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=go to H 2.2.3
H.2.2.3 Is the wetland:
• Within 5 mi (akin)of a brackish or salt water estuary OR
• Within 3 miles of a large field or pasture(>40 acres) OR YES= I point
• Within 1 mile of a lake greater than 20 acres? NO=0 points
Wetland Ratine Form--western Washington 01/04) Page 5 of 8
H 2.3 Near or adjacent to other priority habitats listed by WDFW (see p. 83):
Which of the following priority habitats are within 330 ft.(100m)of the wetland?
(See text for a more detailed description of these priority habitats.)
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 7.6m(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)>81cm
(32 in)dbh or>200 years of age.
Mature forests: Stands with average diameters exceeding 53cm(21 in)dbh;crown cover may be
less than 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 greases
and/or forbs form the natural climax plant community.
Talus; Homogenous areas of rock rubble ranging in average size 0.15—2.Om(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 0
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 remn.ant 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 0.5 ppt.during the period of average annual low flow.
Includes both estuaries and lagoons.
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 1 priority habit...= 1 point
If wetland has 2 priority habitats..............=3 points No habitats...............................=0 points
1-1 2.4 Wetland Landscape: Choose the one description of the landscape around the wetland that best fits
(seep. 85)
• There are at least 3 other wetlands within 1/2 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, rill,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 1/2 mile.................... ........................points =5 3
• There are at least 3 other wetlands within 1/2 mile,BUT the connections between them are
disturbed.............................................................................................................................points = 3
• The wetland fringe on a lake with disturbance and there are 3 other lake-fringe wetlands
within1/2 mile....................................................................................................................points=3
• There is at least 1 wetland within 1/2 mile...........................................................................points=2
• There are no wetlands within 1/2 mile.................................................................................points =0
H 2 TOTAL Score—opportunity for providing habitat Add the scores in the columns above 3
♦ Total Score for Habitat Functions Add the points for H I and H 2;then record the result on p. 1 15
Wetland Rating Form—western Washington(11/04) Page 6 of 8
CATEGORIZATION BASED ON SPECIAL CHARACTERISTICS
Please determine if the wetland meets the attributes described below
and circle the appropriate answers and Category.
Wetland Type—Check off any criteria that apply to the wetland. Circle the Category when the appropriate
criteria are met.
SC1 Estuarine wetlands? (see p.87)
Does the wetland 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 X
SC 1.1 Is the wetland within a National Wildlife Refuge,National Park,National Estuary Reserve,Natural Area
Preserve, State Park or Educational,Environmental,or Scientific Reserve designated under WAC 332-
30-151? Cat.1
YES =Category I NO=go to SC 1..2
S.0 1.2 Is the wetland at least I acre in size and meets at least two of the following conditions?
YES =Category I NO=Category II Cat.I
The wetland is relatively undisturbed(has no diking,ditching,filling,cultivation,grazing, and has
less than 10%cover of non-native plant species. If the non-native Spartina sp ,. are only species
that cover more than 10%of the wetland,then the wetland should be given a dual rating(1/11). Cat. 11
The area of Spartina would be rated a Category I1 while the relatively undisturbed upper marsh
with native species would be a Category 1. Do not,however,exclude the area of Spartina in
determining the size threshold of 1 acre. Dual
_ At least 3/4 of the landward edge of the wetland has a 100 ft. buffer of shrub, forest,or un-grazed Rahn
or un-mowed grassland g
The wetland has at least 2 of the following features: tidal channels,depressions with open water, 1/11
or contiguous freshwater wetlands.
SC2 Natural Heritage Wetlands (seep. 88)
Natural Heritage wetlands have been identified by the Washington Natural heritage 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 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 X or accessed from WNHP/DNR web site
YES X_Contact WNHP/DNR(see p. 88)and go to SC 2.2 NO X
SC 2.2 Has DNR identified the wetland as a high quality undisturbed wetland or as a site with state threatened
or endangered plant species? Cat I
YES =Category 1 NO X
SC3 Boas (seep. 88)
Does the wetland(or part of the wetland)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,function.
1. Does the wetland 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 soil profile? (See Appendix B for a field key to
identify organic soils)? YES=go to question 3 NO=go to question 2
2. Does the wetland 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 question 3 NO=is not a bog for purpose of rating
3. Does the wetland 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 question 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 hold 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.
4. Is the wetland 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 shrub/herbaceous cover)? Cat. 1
YES=Category I NO= Is not a bog for purpose of rating
Wetland Rating Form—western Washington(11/04) Page 7 of 8
SC4 Forested Wetlands(seep, 96)
Does the wetland 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./unction.
Old-growth forests: (west of Cascade Crest) Stands of at least two three 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 an average diameters(dbh)exceeding 21 inches(53 cm);crown cover may be less than
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=X
SC5 Wetlands in Coastal La¢oons (seep, 92)
Does the wetland meet all of the following criteria of a wetland in a coastal lagoon?
The wetland lies in a depressional 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 X not a wetland in a coastal lagoon
SC 5.1 Does the wetland meet 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 ft.)
YES=Category I NO =Category Il Cat. l
SC6 Interdunal Wetlands (seep. 94)
Is the wetland west of the 1889 line(also called the Western Boundary of Upland Ownership or
WBUO)?
YES=Go to SC 6.1 NO X 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
• Gray]and-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 one acre or larger?
YES=Category lI NO =go to SC 6.2 Cat. II
SC 6.2 Is the wetland between 0.1 and 1 acre,or is it in a mosaic of wetlands that is between 0.1 and I acre?
YES=Category III Cat. 111
Category of wetland based on Special Characteristics
♦ Choose the "highest"rating if wetland falls into several categories, and record on p. I.
If you answered NO for all types enter"Not Applicable"on p. 1
Wetland Rating Form—western Washington(11/04) Page 8 of 8