HomeMy WebLinkAbout21313 87th Ave NE_PWD1438_2026 (3)
Complete package constitutes all items. Only complete submittals will be accepted.
Civil - Submittal Requirements, Type I:
ï² Complete Application;
ï² Construction Plans including cut / fill quantities;
 2 full size plan sets 22†x 34â€
 PDF file of the complete plan set
 1 full size set of landscape plans 22†x 34â€
ï² Marysville Utility plans if applicable (2 sets);
ï² Drainage Analysis including calculations and downstream analysis (2 sets) and (PDF file); refer to Stormwater Drainage
Requirements;
ï² Geotechnical Report (2 sets) and (PDF file);
ï² SEPA is required if 500 or more cubic yards of cut / fill is proposed (not required if included with a Land Use Permit);
ï² Grading cut / fill quantity: _______________________________;Cut: 1 CUYD / Fill: 1 CUYD
ï² Drafts of easement(s) dedication(s), and/or CAPE(s) for review;
ï² Flood Hazard Permit Application and required documentation if project is within 100 year flood plain; refer to Flood
Hazard guidance documents;
ï² Construction Calculation Worksheet;
ï² NPDES Permit (if required); See Storm Water Drainage Report, New or Redevelopment Flowcharts;
ï² Assurance Device will be required prior to Permit Issuance (Bond or Assignment of Funds);
ï² Plan Check Fee due at time of permit submittal.
Grading / Paving / Drainage Submittal Requirements, Type II:
ï² Complete Application;
ï² Construction Plans including import/export quantities;
 2 full size plan sets 22†x 34â€
 PDF file of the complete plan set
ï² Drainage Analysis including calculations and downstream analysis (2 sets) and (PDF file); refer to Stormwater Drainage
Requirements;
ï² Geotechnical Report (2 sets) and (PDF file);
ï² SEPA is required if 500 or more cubic yards of cut/fill is proposed (not required if included with a Land Use Permit);
ï² Grading cut / fill quantity: ___________________________Cut: 1 CUYD / Fill: 1 CUYD____;
ï² Construction Calculation Worksheet;
ï² NPDES Permit (if required); See Storm Water Drainage Report, New or Redevelopment Flowcharts;
ï² Plan Check Fee due at time of permit submittal.
Right of Way Submittal Requirements, Type III:
ï² Complete Application;
ï² Construction Plans;
ï² Traffic Control Plan;
ï² Road Closure Request;
ï² Temporary Erosion & Sediment Control (TESC) Plan;
ï² Certificate of Insurance with the City of Arlington named as Additional Insured;
ï² Assurance Device will be required prior to Permit Issuance (Bond or Assignment of Funds);
ï² Engineers Estimated Cost of Construction; $______________________________________;
ï² Permit fee due at time of permit issuance.
Page 2 of 2 REV 10/2017
CONTRUCTION PLAN REVIEW &
INSPECTION FEE WORKSHEET
Community & Economic Development Department
City of Arlington
! 18204 59th Avenue NE ! Arlington WA 98223 ! (360) 403-3551
This form is to be completed and submitted with Type I , Type II Type III Construction Permit Application.
1) Based on permit type requested (Type I, Type II or Type III), complete the form as follows:
! Type I permits complete all sections.
! Type II permits complete as follows:
- Grading Only - Complete Temporary Erosion and Sediment Control (TESC).
- Stormwater Drainage Only - Complete the Temporary Erosion and Sediment Control and Stormwater Drainage
Section for Public or Private
! Type III permits complete the Temporary Erosion and Sediment Control (TESC).
2) The developer shall enter the quantities shown on the construction drawings into the Construction Calculation Worksheet. This
document is used to determine the amount of plan reivew and inspection fees due to the city.
3) Excel will auto-calculate the relevant fields and subtotals throughout the document. Only the 'Quantity' columns should be
completed.
4)
The summary page calculates the fees due at intake for Civil and Stormwater Drainage construction permits only. This does not
include fees for Grading or those required by other departments or agencies. Grading fees are based on Cubic Yard Quantity and
shall be calculated at time of permit submittal. Grading fees shall be paid at permit submittal.
5) If an item that is part of your project does not exist in the spreadsheet complete the Write-In-Items section with the item, quantity
and associated unit cost. There are a few unit prices that are blank, please complete them accordingly.
6) Inspection fees shall be calculated for Private Development during the review process and shall be paid upon permit issuance.
PROJECT COSTS
PUBLIC TOTAL PRIVATE TOTAL TOTAL PROJECT COST
$ 923.28 $ - $
923.28
Verify formula, totals do not match
PLAN REVIEW & INSPECTION FEES
PLAN REVIEW & INSPECTION FEE (6% of Project Value) $ -
GRADING FEE (4) (Cubic Yard ) $ -
Review fees due at time of submittal Total Review Fees Due $ -
An Assurance Device such as a Performance Bond or Assignment of Funds needs to be on file with the City of Arlington prior to permit
issuance. The Assurance Device shall be 150% of the Construction Calculation Worksheet which are as follows:
! Road and Alley (Public)
! Stormwater Drainage and Grading (Public)
! Utilities (Public)
! Temporary Erosion and Sediment Control (Public and Private)
ASSURANCE DEVICE
Base Calculation of Performance Device $ 923.28
PERFORMANCE DEVICE 150% Amount Due $ 1,384.92
Base Calculation of Maintenance Device $ 57.73
MAINTENANCE DEVICE 20% Amount Due $ 11.55
1 Rev 7/2017
CONSTRUCTION CALCULATION WORKSHEET
TEMPORARY EROSION & SEDIMENT CONTROL Include Public Improvements & Private Development
Description Unit Price Unit Quantity Cost Reference #
Backfill & compaction-embankment $ 6.50 CY $ -
Check dams $ 78.00 EACH $ - BMP C207
Catch Basin Protection $ 35.50 EACH $ -
Crushed surfacing 1 1/4" minus $ 18.00 TON $ - WSDOT 9-03.9(3)
Ditching $ 8.00 CY $ -
Excavation-bulk $ 3.00 CY $ -
Fence, silt $ 2.00 LF $ - BMP C233
Fence, Temporary (NGPA) $ 2.00 LF $ -
Geotextile Fabric $ 2.50 SY $ -
Hay Bale Silt Trap $ 0.50 EACH $ -
Hydroseeding $ 4,200.00 ACRE $ - BMP C120
Interceptor Swale / Dike $ 1.00 LF $ -
Jute Mesh $ 2.00 SY $ - BMP C122
Level Spreader $ 1.75 LF $ -
Mulch, by hand, straw, 3" deep $ 3.00 SY $ - BMP C121
Mulch, by machine, straw, 2" deep $ 1.00 SY 2.22 $ 2.22 BMP C121
Piping, temporary, CPP, 6" $ 12.50 LF $ -
Piping, temporary, CPP, 8" $ 19.00 LF $ -
Piping, temporary, CPP, 12" $ 24.00 LF $ -
Plastic covering, 6mm thick, sandbagged $ 3.00 SY $ - BMP C123
Rip Rap, machine placed; slopes $ 50.00 CY $ - WSDOT 9-13.1(2)
Rock Construction Entrance, 50'x15'x1' $ 1,800.00 EACH $ - BMP C105
Rock Construction Entrance, 100'x15'x1' $ 3,600.00 EACH $ - BMP C105
Sediment pond riser assembly $ 3,050.00 EACH $ - BMP C241
Sediment trap, 5' high berm $ 21.00 LF $ - BMP C240
Sed. trap, 5' high, riprapped spillway berm section $ 79.00 LF $ - BMP C240
Seeding, by hand $ 1.00 SY 2.22 $ 2.22 BMP C120
Sodding, 1" deep, level ground $ 8.00 SY $ - BMP C120
Sodding, 1" deep, sloped ground $ 9.50 SY $ - BMP C120
TESC Supervisor $ 84.00 HR 7 $ 588.00
Water truck, dust control $ 130.00 HR $ - BMP C140
WRITE-IN-ITEMS
Straw wattle $ 100.00 EACH 1 $ 100.00
$ - $ -
$ - $ -
SUBTOTAL (TESC Only): $ 692.44
MOBILIZATION 10%: $ 69.24
CONTINGENCY 15%: $ 103.87
TOTAL: $ 865.55
Rev 7/2017
CONSTRUCTION CALCULATION WORKSHEET
GENERAL ITEMS Public Improvements
Description Unit Price Unit Quantity Cost
Backfill & Compaction- embankment $ 8.00 CY $ -
Backfill & Compaction- trench $ 11.00 CY $ -
Clear/Remove Brush, by hand (acre) $ 2,363.00 ACRE 0.0005 $ 1.18
Bollards - fixed $ 325.00 EACH $ -
Bollards - removable $ 600.00 EACH $ -
Clearing/Grubbing/Tree Removal $ 6,000.00 ACRE $ -
Excavation - bulk $ 2.50 CY $ -
Excavation - Trench $ 5.00 CY $ -
Fencing, cedar, 6' high $ 25.00 LF $ -
Fencing, chain link, 4' $ 19.50 LF $ -
Fencing, chain link, vinyl coated, 6' high $ 18.00 LF $ -
Fencing, chain link, gate, vinyl coated, 20' $ 1,563.00 EACH $ -
Fencing, split rail, 3' high $ 14.00 LF $ -
Fill & compact - common barrow $ 27.00 CY $ -
Fill & compact - gravel base $ 30.00 CY $ -
Fill & compact - screened topsoil $ 45.00 CY 1 $ 45.00
Gabion, 12" deep, stone filled mesh $ 62.00 SY $ -
Gabion, 18" deep, stone filled mesh $ 86.00 SY $ -
Gabion, 36" deep, stone filled mesh $ 152.00 SY $ -
Grading, fine, by hand $ 2.00 SY $ -
Grading, fine, with grader $ 1.25 SY $ -
Guard Post $ 90.00 EACH $ -
Monuments $ 104.00 EACH $ -
Sensitive Areas Sign $ 20.00 EACH $ -
Sodding, 1" deep, sloped ground $ 10.00 SY $ -
Topsoil Type A (imported) $ 30.00 CY $ -
Traffic control crew ( 2 flaggers ) $ 98.00 HR $ -
Trail, 4" chipped wood $ 9.00 SY $ -
Trail, 4" crushed cinder $ 10.00 SY $ -
Trail, 4" top course $ 9.50 SY $ -
Wall, retaining, concrete $ 66.00 SF $ -
Wall, rockery $ 13.00 SF $ -
WRITE-IN-ITEMS
$ - $ -
$ - $ -
$ - $ -
Subtotal $ 46.18
Rev 7/2017
CONSTRUCTION CALCULATION WORKSHEET
LANDSCAPING & VEGETATION Include Public Improvements & Private Development
Description Unit Price Unit Quantity Cost
Street Trees $ 500.00 EACH $ -
Root Barrier EACH $ -
Median Landscaping $ - LS $ -
Right-of-Way Landscaping $ - LS $ -
Wetland Landscaping $ - LS $ -
Private Landscaping $ - LS $ -
WRITE-IN-ITEMS
$ - $ -
$ - $ -
$ - $ -
Subtotal $ -
(INCLUDES GENERAL, STREET, SURFACING, WATER, PUBLIC
SEWER, LANDSCAPING) SUBTOTAL $ 46.18
MOBILIZATION 10%: $ 4.62
CONTINGENCY 15%: $ 6.93
GRANDTOTAL: $ 57.73
Rev 7/2017
CRITICAL AREAS STUDY
AND
BUFFER RESTORATION PLAN
FOR
SNOHOMISH COUNTY PUD NO. 1
EAST ARLINGTON TO OSO SUBSTATION 115KV REBUILD
ARLINGTON, WA
Wetland Resources, Inc. Project #17299
Prepared By
Wetland Resources, Inc.
9505 19th Avenue SE, Suite 106
Everett, WA 98208
(425) 337-3174
Prepared For
PUD No. 1 of Snohomish County
Attn: Alex Chorey
PO Box 1107
Everett, WA 98206-1107
June 27, 2018
TABLE OF CONTENTS
1.0 INTRODUCTION .........................................................................................................................1
1.1 SITE DESCRIPTION ..............................................................................................................................2
1.2 PROJECT DESCRIPTION ......................................................................................................................2
2.0 CRITICAL AREA DETERMINATION .............................................................................................3
2.1 REVIEW OF EXISTING INFORMATION ................................................................................................3
2.2 DETERMINATION METHODOLOGY ...................................................................................................4
2.2.1 Hydrophytic Vegetation Criteria .................................................................................................4
2.2.2 Soils Criteria and Mapped Description ........................................................................................4
2.2.3 Hydrology Criteria .......................................................................................................................5
2.3 BOUNDARY DETERMINATION FINDINGS ...........................................................................................5
2.3.1 Wetlands .......................................................................................................................................5
2.3.2 Streams .........................................................................................................................................8
3.0 BUFFER RESTORATION PLAN .....................................................................................................9
4.0 FUNCTIONS AND VALUES ASSESSMENT ...................................................................................10
4.1 FUNCTIONAL COMPONENTS ............................................................................................................10
4.2 EXISTING FUNCTIONS AND VALUES ASSESSMENT ..........................................................................11
4.3 POST-CONSTRUCTION FUNCTIONS AND VALUES ..........................................................................11
5.0 USE OF THIS REPORT ..............................................................................................................12
6.0 REFERENCES ............................................................................................................................13
LIST OF FIGURES
FIGURE 1: AERIAL VIEW OF THE PROJECT AREA ............................................................................1
FIGURE 2: POLE DETAIL ..................................................................................................................3
FIGURE 3: PHOTO OF WETLAND A FROM TVEIT ROAD .................................................................6
FIGURE 4: PHOTO OF WETLAND B BEHIND CHAIN LINK FENCE ......................................................7
FIGURE 5: SOUTHERN-MOST PORTION OF WETLAND C .................................................................8
FIGURE 6: VIEW OF STREAM B NEAR TVEIT ROAD .........................................................................9
LIST OF APPENDICES
APPENDIX A: DOE WETLAND RATING FORMS AND FIGURES
APPENDIX B: CRITICAL AREAS MAP (SHEET 1/1)
ii
1.0 INTRODUCTION
The Snohomish County PUD No. 1 (PUD) East Arlington to Oso 115kV transmission rebuild
project takes place along an 11-mile stretch of existing transmission line between the East
Arlington Substation, located within the city of Arlington, and the Oso Substation, located within
unincorporated Snohomish County. This report will focus on the project portion that takes place
within the city of Arlington.
The project area within the city of Arlington is located in an easement within parcel
00830700000200. The address for this parcel is 21313 87th Avenue NE. The project area is
further located within a portion of Section 12, Township 31N, Range 5E, W.M.
Figure 1: Aerial View of the Project Area
PUD – E. Arlington to Oso 115kV Rebuild 1 Critical Areas Study & Restoration Plan
WRI #17299 June 27, 2018
1.1 SITE DESCRIPTION
The project site is located in an existing utility easement within parcel 00830700000200, just
northeast of the East Arlington Substation. The site is accessed from 87th Avenue NE. While the
project area itself is no larger than 20 square feet, the property it is located on consists of a single-
family residence, maintained lawn, and ornamental plantings. The project area is located in the
southeast corner of this parcel, within maintained lawn. The vegetation surrounding the work
area is routinely mowed.
A naturally vegetated corridor is located east of the subject site. Within this forested area, a
wetland and stream are documented by public agencies. The stream is Eagle Creek (Stream A),
which drains to the north, ultimately to the South Fork Stillaguamish River. The wetland
surrounding this stream (Wetland C) is rated as a Category II wetland with high habitat
functions. Two other wetlands were identified within the project vicinity. These include one
wetland approximately 400 feet south of the subject site (Wetland A), rated as a Category II
wetland with moderate habitat functions. This wetland is also associated with Eagle Creek,
though it is disconnected from Wetland B by Tveit Road. A third wetland, Wetland B, was
identified approximately 300 feet west of the project area, and is rated as a Category III wetland
with moderate habitat functions.
1.2 PROJECT DESCRIPTION
The proposed project takes place within the buffer of Wetland C. The Applicant proposes to
replace one (1) existing wood transmission pole with one (1) ductile iron transmission pole. The
new 80-foot pole will be set in a 2-foot wide augured hole approximately 10 feet southeast of the
existing pole. The existing pole will be removed and the hole will be backfilled. Backfill will be
composed of crushed rock, with six inches of topsoil on top.
This project activity will replace approximately 2 square feet of impervious surface, and may
temporarily impact up to 20 square feet of existing grass within the buffer area. Vegetation
impacts from clearing activities may occur, though are anticipated to be temporary because
baseline vegetation can be restored in one growing season or less. In order to stabilize and restore
the disturbed area, grass seed will be applied. See the section 3.0: Buffer Restoration Plan for more
detail.
No new impervious surface is proposed. Project impacts are temporary in nature, and work will
only occur in maintained lawn. No functioning buffer area or critical areas will be impacted by
the proposed project.
PUD – E. Arlington to Oso 115kV Rebuild 2 Critical Areas Study & Restoration Plan
WRI #17299 June 27, 2018
Figure 2: Pole Detail
2.0 CRITICAL AREA DETERMINATION
2.1 REVIEW OF EXISTING INFORMATION
Prior to conducting the site investigation, public resource information was reviewed to gather
background information on the subject property and the surrounding area in regards to
wetlands, streams, and other critical areas. These sources included the USFWS National
Wetlands Inventory (NWI), USDA/NRCS Web Soil Survey, Snohomish County PDS Map
Portal, WDFW SalmonScape mapping tool, and WDFW Priority Habitat and Species (PHS)
Interactive Map.
Public Literature Review Findings
• The National Wetlands Inventory displays a wetland and associated riverine feature
approximately 400 feet northeast of the subject site. No other features are displayed in the
vicinity.
• NRCS mapped soils in the vicinity of the subject properties as Norma loam in the far
eastern portion of the property (within project area) and as Everett very gravelly sandy
loam in the remaining portion of the subject property. See section 2.2.2 for further detail.
• Snohomish County displays Eagle Creek (Type F) to the east and the South Fork
Stillaguamish River (Type S) and its associated floodplain approximately 0.5 miles to the
northeast.
• WDFW PHS displays Eagle Creek, to the east, as supporting Coho salmon. PHS also
displays the NWI wetland features mentioned above.
PUD – E. Arlington to Oso 115kV Rebuild 3 Critical Areas Study & Restoration Plan
WRI #17299 June 27, 2018
• WDFW SalmonScape displays the South Fork Stillaguamish River east of the site as the
closest fish-supporting waterbody to the site. This stream reportedly supports Pink,
Chum, Chinook, Coho and Sockeye salmon, Steelhead trout, and bull trout.
2.2 DETERMINATION METHODOLOGY
Wetland Resources, Inc. (WRI) staff conducted site investigations in October, 2017, to locate and
classify wetlands and streams occurring within the project vicinity. The Ordinary High Water
Mark (OHWM) of water bodies is generally identified using the methodologies described in the
Washington State Department of Ecology (DOE), Determining the Ordinary High Water Mark for
Shoreline Management Act Compliance in Washington State (Anderson et al. 2016). Wetland conditions
are generally evaluated and delineated using routine methodology described in the 2010 Regional
Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountains, Valleys, and Coast
Region (Version 2.0, referred to as 2010 Regional Supplement).
The following criteria are used in wetland boundary determinations:
1.) Examination of the site for hydrophytic vegetation (species present and percent cover);
2.) Examination of the site for hydric soils;
3.) Determining the presence of wetland hydrology
2.2.1 Hydrophytic Vegetation Criteria
The 2010 Regional Supplement defines hydrophytic vegetation as “assemblage of macrophytes
that occur in areas where inundation or soil saturation is either permanent or have sufficient
frequency and duration to influence plant occurrence.†Field indicators were used to determine
whether the vegetation meets the definition for hydrophytic vegetation.
2.2.2 Soils Criteria and Mapped Description
The soils underlying the site are mapped by USDA-NRCS (Web Soil Survey) as: Everett very
gravelly sandy loam, 0-8% slopes, and Norma loam. A detailed description of these soil units is
provided below.
Everett very gravelly sandy loam, 0-8% slopes, is described as very deep, somewhat excessively
drained soil on terraces and outwash plains. It formed in glacial outwash. Typically, the surface
layer, where mixed to a depth of about 6 inches, is dark brown gravelly sandy loam. The subsoil
is dark brown very gravelly sandy loam about 12 inches thick. Included in this unit are small
areas of Alderwood soils on till plains, Indianola soils on terraces and outwash plains, and
Ragnar soils on outwash plains. Included areas make up about 15 percent of the total acreage.
Permeability of this Everett soil is rapid. Available water capacity is low.
Norma loam is described as very deep poorly drained soil is in depressional areas on outwash
plains and till plains. It formed in alluvium. Typically the surface layer is very dark gray loam
about 10 inches thick. The subsoil is dark grayish brown sandy loam about 18 inches thick.
Included in this unit are small areas of soils that have a surface layer and subsoil of silt loam and
soils that have a gravelly and sandy subsoil. Also included are areas of Bellingham and Custer
PUD – E. Arlington to Oso 115kV Rebuild 4 Critical Areas Study & Restoration Plan
WRI #17299 June 27, 2018
soils and Terric medisaprists in depressional areas. Included areas make up about 15 percent of
the total acreage. Permeability of this soil is moderately rapid. Available water capacity is
moderate. This soil is listed as hydric in the Hydric Soils List for Washington.
2.2.3 Hydrology Criteria
The 2010 Regional Supplement defines wetland hydrology as “areas that are inundated (flooded
or ponded) or the water table is less than or equal to 12 inches below the soil surface for 14 or
more consecutive days during the growing season at a minimum frequency of 5 years in 10.â€
During the early growing season, wetland hydrology determinations are made based on physical
observation of surface water, a high water table, or saturation in the upper 12 inches. Outside of
the early growing season, wetland hydrology determinations are made based on physical
evidence of recent inundation or saturation (i.e. water marks, surface soil cracks, water-stained
leaves).
2.3 BOUNDARY DETERMINATION FINDINGS
Due to site access constraints, critical area locations and characteristics outside of public rights-
of-way and easements were estimated using previous site surveys, visual inspection from
accessible locations, and publicly available data. Soil and hydrology data were not collected in
these circumstances, though observable vegetation and hydrology is noted is the section below.
2.3.1 Wetlands
Wetlands within the project area were classified according to the Cowardin System, as described
in Classification of Wetlands and Deepwater Habitats of the United States (Cowardin et al., 1979), and
according to the Hydrogeomorphic (HGM) Classification System (Brinson 1993). Wetlands were
rated using the DOE Wetland Rating System for Western Washington: 2014 Update (Hruby 2014).
Buffers are assigned to wetlands based upon the final wetland category and habitat function
score, as well as the proposed land use intensity adjacent to the wetland, in accordance with
Arlington Municipal Code (AMC) Table 20.93-4.
Table 1. Wetlands within Project Scope Area
Rating Score
Standard Cowardin
Name Category (Total points/ HGM Class
Buffer (ft) Class
Habitat points)
Wetland A Category II 21/7 165 PFO1C Depressional
Wetland B Category III 19/5 105 PSS1C Depressional
Wetland C Category II 22/8 225 PFO1C Depressional
Wetland A
Wetland A is a Category II depressional wetland associated with Eagle Creek, and has a
Cowardin classification of Palustrine Forested, Broad-leaved Deciduous, Seasonally-flooded.
Wetland A is located within portions of the city of Arlington and unincorporated Snohomish
County. It is located south of the intersection of 87th Ave NE and Tveit Road. Vegetation within
the wetland includes, but is not limited to, big-leaf maple (Acer macrophyllum; FACU), red alder
PUD – E. Arlington to Oso 115kV Rebuild 5 Critical Areas Study & Restoration Plan
WRI #17299 June 27, 2018
(Alnus rubra; FAC), pacific willow (Salix lucida; FACW), salmonberry (Rubus spectabilis; FAC),
Himalayan blackberry (Rubus armeniacus; FAC), and lady fern (Athyrium filix-femina; FAC). Wetland
A was not inventoried by NWI, however the Snohomish County Wetland Inventory displays it.
Wetland A received an overall score of 21 points on the 2014 Wetland Rating System, with a
habitat functions score of 7 points. Wetlands with scores between 20 and 22 are classified as
Category II wetlands. Category II wetlands with habitat scores of 7 points, and adjacent to
standard intensity land uses, receive 165-foot buffers within the city of Arlington.
Figure 3: Photo of Wetland A from Tveit Road
Wetland B
Wetland B is a small, Category III depressional wetland, and has a Cowardin classification of
Palustrine Scrub-shrub, Broad-leaved Deciduous, Seasonally-flooded. It is located entirely within
the city of Arlington, just north of the East-Arlington Substation. Dominant vegetation appears
to include Pacific willow (Salix lucida; FACW), Sitka willow (Salix sitchensis; FACW), and
Himalayan blackberry (Rubus armeniacus; FAC). Hydrology could not be seen from the subject
property, however it appears that water present in the grass-lined swale west of the substation
was flowing from this area. This feature was not mapped by NWI or Snohomish County
Wetland Inventory.
Wetland B received an overall score of 19 points on the 2014 Wetland Rating System, with a
habitat functions score of 5 points. Wetlands with scores between 16 and 19 are classified as
Category III wetlands. Category III wetlands with habitat scores of 5 points, and adjacent to
standard intensity land uses, receive 105-foot buffers within the city of Arlington.
PUD – E. Arlington to Oso 115kV Rebuild 6 Critical Areas Study & Restoration Plan
WRI #17299 June 27, 2018
Figure 4: Photo of Wetland B behind chain link fence
Wetland C
Wetland C is a Category II depressional wetland associated with Eagle Creek, and has a
Cowardin classification of Palustrine Forested, Broad-leaved Deciduous, Seasonally-flooded.
Wetland C is located entirely within unincorporated Snohomish County, downstream and north
of Wetland A. Dominant vegetation within the wetland appears to include red alder (Alnus rubra;
FAC), Western red cedar (Thuja plicata; FAC), salmonberry (Rubus spectabilis; FAC), hardhack
(Spiraea douglasii; FACW), and skunk cabbage (Lysichiton americanus; OBL). Only a small portion of
Wetland C was inventoried by NWI, however the Snohomish County Wetland Inventory
displays a majority of the feature.
Wetland C received an overall score of 22 points on the 2014 Wetland Rating System, with a
habitat functions score of 8 points. Wetlands with scores between 20 and 22 are classified as
Category II wetlands. Category II wetlands with habitat scores of 8 points, and adjacent to
standard intensity land uses, receive 225-foot buffers within the city of Arlington.
PUD – E. Arlington to Oso 115kV Rebuild 7 Critical Areas Study & Restoration Plan
WRI #17299 June 27, 2018
Figure 5: Southern-most portion of Wetland C
2.3.2 Streams
Streams within the project area were classified according to the Cowardin System, as well as the
water typing rules provided in the Washington Administrative Code (WAC), section 222-16-030.
Stream buffers are assigned according to the WAC water typing system, in accordance with
AMC Table 20.93-3. Type F streams in the City are assigned buffers of 150 or 100 feet
depending on whether they support ESA-listed fish species or not.
Stream A (Eagle Creek)
Stream A (Eagle Creek) is a Type F water associated with Wetlands A and C. Eagle Creek flows
north through Wetlands A and C, and continues north-northeast until it flows into the South
Fork Stillaguamish River. Eagle Creek has a Cowardin classification of Riverine, Upper
Perennial, Unconsolidated Bottom. Eagle Creek is documented and modeled to support Coho
salmon (WDFW 2018b), and is also documented by DNR FPAMT as a Type F stream (DNR
2018). Because Eagle Creek reportedly supports Coho salmon, and the stream is hydrologically
connected to the South Fork Stillaguamish River, it is assumed that ESA-listed species (Chinook
salmon and Steelhead trout) present in the Stillaguamish also have access to Eagle Creek. Type F
waters supporting ESA-listed species receive 150-foot buffers in the city of Arlington.
PUD – E. Arlington to Oso 115kV Rebuild 8 Critical Areas Study & Restoration Plan
WRI #17299 June 27, 2018
Figure 6: View of Stream A near Tveit Road
3.0 BUFFER RESTORATION PLAN
No permanent impacts (new impervious surface) to critical areas or buffer are proposed for this
project. Pole replacement work may temporarily impact up to 20 square feet of buffer area.
Vegetation clearing, if any, will occur in maintained lawn area, which can be restored in one
growing season or less.
The applicant proposes to restore any temporary buffer impacts on-site and in-kind at a 1:1 ratio.
In order to stabilize and restore the disturbed area, a grass seed mixture will be applied as
specified below.
Temporary Impact Grass Seed Mixture (20 square feet)
Common Name Latin Name lbs/1,000 s.f.
Tall fescue Festuca arundinacea 0.4
Colonial bentgrass Agrostis tenuis 0.4
Annual ryegrass Lolium perenne var. multiflorum 0.5
White clover Trifolium repens 0.2
For more detail on project conservation measures and restoration techniques, please refer to the
project Stormwater Pollution Prevention Plan (SWPPP), Sheet 2/2 of the Grading Plan.
PUD – E. Arlington to Oso 115kV Rebuild 9 Critical Areas Study & Restoration Plan
WRI #17299 June 27, 2018
4.0 FUNCTIONS AND VALUES ASSESSMENT
The following assessment is intended to compare the current and post-mitigation functions and
values provided by the on-site wetland buffer.
The methodology for this functions and values assessment is based on professional opinion
developed through past field analyses and interpretation. This assessment pertains specifically to
the on-site wetland and stream buffer, but is typical for assessments of similar systems common to
Western Washington.
4.1 FUNCTIONAL COMPONENTS
Stream and wetland buffers in Western Washington perform a variety of ecosystem functions.
Included among the most important are: flood/stormwater control, base flow/groundwater
support, erosion/bank protection, woody debris recruitment, water quality improvement, natural
biological support, and overall wildlife habitat function.
Streambank Stabilization/Erosion Control
An important function provided by stream buffers is the stabilization of the streambank. Tree
and shrub roots maintaining the integrity of the streambank and inhibit erosion. LWD
contribution also helps in stabilizing streambanks.
Large Woody Debris (LWD) Recruitment
Another important function provided by functioning buffers is LWD contribution. Mature trees
in the buffers fall into aquatic areas, which provides a number of beneficial habitat roles. LWD
stabilizes streambanks and beds, holds spawning gravels, creates insect habitat (and thus food for
insectivores), and creates pools providing resting areas for salmonids.
Water Quality and Hydrology Functions
Vegetated buffers obstruct water flow, thereby decreasing water velocity, allowing infiltration
into the soil, and reducing soil erosion potential. Healthy floodplains and buffers store water
during wet periods and release it during dry periods, thereby maintaining a steady base flow
throughout the year. Buffer vegetation impedes the flow of runoff, increases the humus content
of soil (greater adsorption capacity), and preserves soil composition as intense rainfall hits the
ground. Stream buffers improve water quality by acting as filters as water passes through them,
trapping sediments and pollutants from surface water. Healthy vegetation also provides
temperature moderation to adjacent aquatic areas. Shading by the forest canopy maintains
cooler water temperatures and influences the availability of dissolved oxygen.
Wildlife Habitat Functions
Healthy vegetation within buffers helps maintain wildlife habitat function within and adjacent to
aquatic areas. Riparian vegetation provides many crucial aspects of healthy fish habitat including
shade, bank stabilization, nutrient cycling, pollutant removal and input of large woody debris
(LWD) in the channel. LWD is especially important since it facilitates the formation of important
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WRI #17299 June 27, 2018
habitat features like pools through bed scour, and it buffers the severity of sedimentation and
erosion. Vegetated buffers also provide benefits to terrestrial wildlife including, refuge/cover,
nesting, foraging, and resting habitat.
4.2 EXISTING FUNCTIONS AND VALUES ASSESSMENT
The proposed project area is located within an existing utility corridor, and is surrounded by
maintained lawn. The project area currently consists of pre-disturbed and non-functioning buffer
area. The project area has been maintained in this condition since the original transmission line
was installed.
4.3 POST-CONSTRUCTION FUNCTIONS AND VALUES
The on-site wetland buffer is anticipated to provide the same level of functions and values when
project work and restoration is complete. Temporary herbaceous vegetation impacts are
anticipated to regenerate to baseline conditions in less than one growing season after grass
seeding. Additionally, the replacement pole material is inert (ductile iron), and considered less
harmful and more durable than the existing wood pole. Project impacts are discountable due to
the size and scope of the project and the current condition of the project area. The baseline
condition of the project area will be maintained.
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5.0 USE OF THIS REPORT
This report is supplied to Snohomish County PUD No. 1 as a means of determining on-site
critical area conditions, as required during the permitting process by City of Arlington. This
report is based largely on readily observable conditions and, to a lesser extent, on readily
ascertainable conditions. No attempt has been made to determine hidden or concealed
conditions.
The laws applicable to wetlands are subject to varying interpretations and may be changed at
any time by the courts or legislative bodies. This report is intended to provide information
deemed relevant in the applicant's attempt to comply with the laws now in effect.
The work for this report has conformed to the standard of care employed by wetland ecologists.
No other representation or warranty is made concerning the work or this report and any implied
representation or warranty is disclaimed.
Wetland Resources, Inc.
Elyse Denkers
John Laufenberg
Associate Ecologist
Principal Ecologist
Professional Wetland Scientist
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WRI #17299 June 27, 2018
6.0 REFERENCES
Anderson et al. 2016. Determining the Ordinary High Water Mark for Shoreline Management Act Compliance
in Washington State. WA Department of Ecology. Publication #16-06-029.
Arlington, City of. 2015. Arlington Municipal Code, Title 20, Zoning, Chapter 20.88,
Environmentally Critical Areas.
Brinson, M.M. 1993. A Hydrogeomorphic Classification for Wetlands. Technical Report WRP–DE–4,
U.S. Army Corps of Engineers Engineer Waterways Experiment Station, Vicksburg, MS.
Cowardin, L.M., V. Carter, F.C. Golet and E.T. Laroe. 1979. Classification of Wetlands and Deep
Water Habitats of the United States. U.S. Fish and Wildlife Service. FWS/OBS 79/31.
Hruby, T. 2014. Washington State Wetland Rating System for Western Washington: 2014 Update.
Washington State Department of Ecology. Publication #14-06-029. October 2014.
Lichvar, R.W. 2014. The National Wetland Plant List. Phytoneuron 2014-41: 1–42. Published April
2, 2014.
Snohomish, County of. 2018. Snohomish County PDS Map Portal.
https://snohomishcountywa.gov/3752/PDS-Map-Portal
U.S. Army Corps of Engineers. 2010. Regional Supplement to the Corps of Engineers Wetland Delineation
Manual: Western Mountains, Valleys, and Coast Region (Version 2.0). Environmental Laboratory,
Vicksburg, MS. Publication # ERDC/EL TR-10-3.
U.S. Department of Agriculture- Natural Resource Conservation Service (NRCS). Web Soil
Survey. http://websoilsurvey.nrcs.usda.gov/app/HomePage.htm
U.S. Fish and Wildlife Service (USFWS). 2018. National Wetlands Inventory (NWI) Interactive Mapping
Tool. http://www.fws.gov/wetlands/Data/Mapper.html
Washington Department of Fish and Wildlife (WDFW). 2018a. SalmonScape Interactive Mapping
Tool. http://apps.wdfw.wa.gov/salmonscape/map.html.
Washington Department of Fish and Wildlife (WDFW). 2018b. Priority Habitats and Species (PHS)
Interactive Mapping Tool. http://wdfw.wa.gov/mapping/phs/.
Washington Department of Natural Resources (DNR). 2018. Forest Practices Application Mapping
Tool (FPAMT). https://fortress.wa.gov/dnr/protectiongis/fpamt/default.aspx
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APPENDIX A
DOE WETLAND RATING FORMS AND FIGURES
Wetland name or number ______ A
RATING SUMMARY – Western Washington
Name of wetland (or ID #): _________________________________ Date of site visit: _____ Wetland A 10/24/17
Rated by____________________________ Trained by Ecology?__ Yes ___No Date of training______ JL & ED ✔ Sept2015
HGM Class used for rating_________________ DEPRESSIONAL Wetland has multiple HGM classes?___Y ____N✔
NOTE: Form is not complete without the figures requested (figures can be combined).
Source of base aerial photo/map ______________________________________ ESRI
OVERALL WETLAND CATEGORY ____ II (based on functions___ or special characteristics___) ✔
1. Category of wetland based on FUNCTIONS
_______Category I – Total score = 23 - 27
Score for each
_______✔ Category II – Total score = 20 - 22 function based
on three
_______Category III – Total score = 16 - 19 ratings
_______Category IV – Total score = 9 - 15 (order of ratings
is not
important)
FUNCTION Improving Hydrologic Habitat
Water Quality
9 = H,H,H
Circle the appropriate ratings
8 = H,H,M
Site Potential H M L H M L H M L 7 = H,H,L
Landscape Potential H M L H M L H M L 7 = H,M,M
Value H M L H M L H M L TOTAL 6 = H,M,L
6 = M,M,M
Score Based on
8 6 7 21 5 = H,L,L
Ratings
5 = M,M,L
4 = M,L,L
3 = L,L,L
2. Category based on SPECIAL CHARACTERISTICS of wetland
CHARACTERISTIC CATEGORY
Estuarine I II
Wetland of High Conservation Value I
Bog I
Mature Forest I
Old Growth Forest I
Coastal Lagoon I II
Interdunal I II III IV
None of the above ✔
Wetland Rating System for Western WA: 2014 Update 1
Rating Form – Effective January 1, 2015
Wetland name or number ______ A
Maps and figures required to answer questions correctly for
Western Washington
Depressional Wetlands
Map of: To answer questions: Figure #
Cowardin plant classes D 1.3, H 1.1, H 1.4 A1
Hydroperiods D 1.4, H 1.2 A1
Location of outlet (can be added to map of hydroperiods) D 1.1, D 4.1 A1
Boundary of area within 150 ft of the wetland (can be added to another figure) D 2.2, D 5.2 A1
Map of the contributing basin D 4.3, D 5.3 A2
1 km Polygon: Area that extends 1 km from entire wetland edge - including H 2.1, H 2.2, H 2.3
A2
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website) D 3.1, D 3.2 A3
Screen capture of list of TMDLs for WRIA in which unit is found (from web) D 3.3 A4
Riverine Wetlands
Map of: To answer questions: Figure #
Cowardin plant classes H 1.1, H 1.4
Hydroperiods H 1.2
Ponded depressions R 1.1
Boundary of area within 150 ft of the wetland (can be added to another figure) R 2.4
Plant cover of trees, shrubs, and herbaceous plants R 1.2, R 4.2
Width of unit vs. width of stream (can be added to another figure) R 4.1
Map of the contributing basin R 2.2, R 2.3, R 5.2
1 km Polygon: Area that extends 1 km from entire wetland edge - including H 2.1, H 2.2, H 2.3
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website) R 3.1
Screen capture of list of TMDLs for WRIA in which unit is found (from web) R 3.2, R 3.3
Lake Fringe Wetlands
Map of: To answer questions: Figure #
Cowardin plant classes L 1.1, L 4.1, H 1.1, H 1.4
Plant cover of trees, shrubs, and herbaceous plants L 1.2
Boundary of area within 150 ft of the wetland (can be added to another figure) L 2.2
1 km Polygon: Area that extends 1 km from entire wetland edge - including H 2.1, H 2.2, H 2.3
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website) L 3.1, L 3.2
Screen capture of list of TMDLs for WRIA in which unit is found (from web) L 3.3
Slope Wetlands
Map of: To answer questions: Figure #
Cowardin plant classes H 1.1, H 1.4
Hydroperiods H 1.2
Plant cover of dense trees, shrubs, and herbaceous plants S 1.3
Plant cover of dense, rigid trees, shrubs, and herbaceous plants S 4.1
(can be added to figure above)
Boundary of 150 ft buffer (can be added to another figure) S 2.1, S 5.1
1 km Polygon: Area that extends 1 km from entire wetland edge - including H 2.1, H 2.2, H 2.3
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website) S 3.1, S 3.2
Screen capture of list of TMDLs for WRIA in which unit is found (from web) S 3.3
Wetland Rating System for Western WA: 2014 Update 2
Rating Form – Effective January 1, 2015
Wetland name or number ______ A
HGM Classification of Wetlands in Western Washington
For questions 1-7, the criteria described must apply to the entire unit being rated.
If the hydrologic criteria listed in each question do not apply to the entire unit being rated, you
probably have a unit with multiple HGM classes. In this case, identify which hydrologic criteria in
questions 1-7 apply, and go to Question 8.
1. Are the water levels in the entire unit usually controlled by tides except during floods?
NO – go to 2 YES – the wetland class is Tidal Fringe – go to 1.1
1.1 Is the salinity of the water during periods of annual low flow below 0.5 ppt (parts per thousand)?
NO – Saltwater Tidal Fringe (Estuarine) YES – Freshwater Tidal Fringe
If your wetland can be classified as a Freshwater Tidal Fringe use the forms for Riverine wetlands. If it
is Saltwater Tidal Fringe it is an Estuarine wetland and is not scored. This method cannot be used to
score functions for estuarine wetlands.
2. The entire wetland unit is flat and precipitation is the only source (>90%) of water to it. Groundwater
and surface water runoff are NOT sources of water to the unit.
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 entire wetland unit meet all of the following criteria?
___The vegetated part of the wetland is on the shores of a body of permanent open water (without any
plants on the surface at any time of the year) at least 20 ac (8 ha) in size;
___At least 30% of the open water area is deeper than 6.6 ft (2 m).
NO – go to 4 YES – The wetland class is Lake Fringe (Lacustrine Fringe)
4. Does the entire wetland unit meet all of the following criteria?
____The wetland is on a slope (slope can be very gradual),
____The water flows through the wetland in one direction (unidirectional) and usually comes from
seeps. It may flow subsurface, as sheetflow, or in a swale without distinct banks,
____The water leaves the wetland without being impounded.
NO – go to 5 YES – The wetland class is Slope
NOTE: Surface water does not pond in these type of wetlands except occasionally in very small and
shallow depressions or behind hummocks (depressions are usually <3 ft diameter and less than 1 ft
deep).
5. Does the entire wetland unit meet all of the following criteria?
____The unit is in a valley, or stream channel, where it gets inundated by overbank flooding from that
stream or river,
____The overbank flooding occurs at least once every 2 years.
Wetland Rating System for Western WA: 2014 Update 3
Rating Form – Effective January 1, 2015
Wetland name or number ______ A
NO – go to 6 YES – The wetland class is Riverine
NOTE: The Riverine unit can contain depressions that are filled with water when the river is not
flooding
6. Is the entire wetland unit in a topographic depression in which water ponds, or is saturated to the
surface, at some time during the year? This means that any outlet, if present, is higher than the interior
of the wetland.
NO – go to 7 YES – The wetland class is Depressional
7. Is the entire wetland unit located in a very flat area with no obvious depression and no overbank
flooding? The unit does not pond surface water more than a few inches. The unit seems to be
maintained by high groundwater in the area. The wetland may be ditched, but has no obvious natural
outlet.
NO – go to 8 YES – The wetland class is Depressional
8. Your wetland unit seems to be difficult to classify and probably contains several different HGM
classes. For example, seeps at the base of a slope may grade into a riverine floodplain, or a small
stream within a Depressional wetland has a zone of flooding along its sides. GO BACK AND IDENTIFY
WHICH OF THE HYDROLOGIC REGIMES DESCRIBED IN QUESTIONS 1-7 APPLY TO DIFFERENT
AREAS IN THE UNIT (make a rough sketch to help you decide). Use the following table to identify the
appropriate class to use for the rating system if you have several HGM classes present within the
wetland unit being scored.
NOTE: Use this table only if the class that is recommended in the second column represents 10% or
more of the total area of the wetland unit being rated. If the area of the HGM class listed in column 2
is less than 10% of the unit; classify the wetland using the class that represents more than 90% of the
total area.
HGM classes within the wetland unit HGM class to
being rated use in rating
Slope + Riverine Riverine
Slope + Depressional Depressional
Slope + Lake Fringe Lake Fringe
Depressional + Riverine along stream Depressional
within boundary of depression
Depressional + Lake Fringe Depressional
Riverine + Lake Fringe Riverine
Salt Water Tidal Fringe and any other Treat as
class of freshwater wetland ESTUARINE
If you are still unable to determine which of the above criteria apply to your wetland, or if you have
more than 2 HGM classes within a wetland boundary, classify the wetland as Depressional for the
rating.
Wetland Rating System for Western WA: 2014 Update 4
Rating Form – Effective January 1, 2015
Wetland name or number ______ A
DEPRESSIONAL AND FLATS WETLANDS
Water Quality Functions - Indicators that the site functions to improve water quality
D 1.0. Does the site have the potential to improve water quality?
D 1.1. Characteristics of surface water outflows from the wetland:
Wetland is a depression or flat depression (QUESTION 7 on key) with no surface water leaving it (no outlet).
points = 3
Wetland has an intermittently flowing stream or ditch, OR highly constricted permanently flowing outlet. 1
points = 2
✔ Wetland has an unconstricted, or slightly constricted, surface outlet that is permanently flowing points = 1
Wetland is a flat depression (QUESTION 7 on key), whose outlet is a permanently flowing ditch. points = 1
D 1.2. The soil 2 in below the surface (or duff layer) is true clay or true organic (use NRCS definitions).Yes = 4 No = 0 0
D 1.3. Characteristics and distribution of persistent plants (Emergent, Scrub-shrub, and/or Forested Cowardin classes):
✔ Wetland has persistent, ungrazed, plants > 95% of area points = 5
Wetland has persistent, ungrazed, plants > ½ of area points = 3 5
Wetland has persistent, ungrazed plants > 1/ of area points = 1
10
Wetland has persistent, ungrazed plants <1/ of area points = 0
10
D 1.4. Characteristics of seasonal ponding or inundation:
This is the area that is ponded for at least 2 months. See description in manual.
Area seasonally ponded is > ½ total area of wetland points = 4 0
Area seasonally ponded is > ¼ total area of wetland points = 2
✔ Area seasonally ponded is < ¼ total area of wetland points = 0
Total for D 1 Add the points in the boxes above 6
Rating of Site Potential If score is: 12-16 = H ✔ 6-11 = M 0-5 = L Record the rating on the first page
D 2.0. Does the landscape have the potential to support the water quality function of the site?
D 2.1. Does the wetland unit receive stormwater discharges? Yes = 1 No = 0 1
D 2.2. Is > 10% of the area within 150 ft of the wetland in land uses that generate pollutants? Yes = 1 No = 0 1
D 2.3. Are there septic systems within 250 ft of the wetland? Yes = 1 No = 0 1
D 2.4. Are there other sources of pollutants coming into the wetland that are not listed in questions D 2.1-D 2.3?
0
Source_______________ Yes = 1 No = 0
Total for D 2 Add the points in the boxes above 3
Rating of Landscape Potential If score is: ✔ 3 or 4 = H 1 or 2 = M 0 = L Record the rating on the first page
D 3.0. Is the water quality improvement provided by the site valuable to society?
D 3.1. Does the wetland discharge directly (i.e., within 1 mi) to a stream, river, lake, or marine water that is on the
303(d) list? Yes = 1 No = 0 0
D 3.2. Is the wetland in a basin or sub-basin where an aquatic resource is on the 303(d) list? Yes = 1 No = 0 1
D 3.3. Has the site been identified in a watershed or local plan as important for maintaining water quality (answer YES
2
if there is a TMDL for the basin in which the unit is found)? Yes = 2 No = 0
Total for D 3 Add the points in the boxes above 3
Rating of Value If score is: ✔ 2-4 = H 1 = M 0 = L Record the rating on the first page
Wetland Rating System for Western WA: 2014 Update 5
Rating Form – Effective January 1, 2015
Wetland name or number ______ A
DEPRESSIONAL AND FLATS WETLANDS
Hydrologic Functions - Indicators that the site functions to reduce flooding and stream degradation
D 4.0. Does the site have the potential to reduce flooding and erosion?
D 4.1. Characteristics of surface water outflows from the wetland:
Wetland is a depression or flat depression with no surface water leaving it (no outlet) points = 4
Wetland has an intermittently flowing stream or ditch, OR highly constricted permanently flowing outletpoints = 2 0
Wetland is a flat depression (QUESTION 7 on key), whose outlet is a permanently flowing ditch points = 1
✔ Wetland has an unconstricted, or slightly constricted, surface outlet that is permanently flowing points = 0
D 4.2. Depth of storage during wet periods: Estimate the height of ponding above the bottom of the outlet. For wetlands
with no outlet, measure from the surface of permanent water or if dry, the deepest part.
Marks of ponding are 3 ft or more above the surface or bottom of outlet points = 7
Marks of ponding between 2 ft to < 3 ft from surface or bottom of outlet points = 5 3
✔ Marks are at least 0.5 ft to < 2 ft from surface or bottom of outlet points = 3
The wetland is a “headwater†wetland points = 3
Wetland is flat but has small depressions on the surface that trap water points = 1
Marks of ponding less than 0.5 ft (6 in) points = 0
D 4.3. Contribution of the wetland to storage in the watershed: Estimate the ratio of the area of upstream basin
contributing surface water to the wetland to the area of the wetland unit itself.
The area of the basin is less than 10 times the area of the unit points = 5
0
The area of the basin is 10 to 100 times the area of the unit points = 3
✔ The area of the basin is more than 100 times the area of the unit points = 0
Entire wetland is in the Flats class points = 5
Total for D 4 Add the points in the boxes above 3
Rating of Site Potential If score is: 12-16 = H 6-11 = M ✔ 0-5 = L Record the rating on the first page
D 5.0. Does the landscape have the potential to support hydrologic functions of the site?
D 5.1. Does the wetland receive stormwater discharges? Yes = 1 No = 0 1
D 5.2. Is >10% of the area within 150 ft of the wetland in land uses that generate excess runoff? Yes = 1 No = 0 1
D 5.3. Is more than 25% of the contributing basin of the wetland covered with intensive human land uses (residential at 0
>1 residence/ac, urban, commercial, agriculture, etc.)? Yes = 1 No = 0
Total for D 5 Add the points in the boxes above 2
Rating of Landscape Potential If score is: 3 = H ✔ 1 or 2 = M 0 = L Record the rating on the first page
D 6.0. Are the hydrologic functions provided by the site valuable to society?
D 6.1. The unit is in a landscape that has flooding problems. Choose the description that best matches conditions around
the wetland unit being rated. Do not add points. Choose the highest score if more than one condition is met.
The wetland captures surface water that would otherwise flow down-gradient into areas where flooding has
damaged human or natural resources (e.g., houses or salmon redds):
✔  Flooding occurs in a sub-basin that is immediately down-gradient of unit. points = 2
ï‚· Surface flooding problems are in a sub-basin farther down-gradient. points = 1 2
Flooding from groundwater is an issue in the sub-basin. points = 1
The existing or potential outflow from the wetland is so constrained by human or natural conditions that the
water stored by the wetland cannot reach areas that flood. Explain why _____________ points = 0
There are no problems with flooding downstream of the wetland. points = 0
D 6.2. Has the site been identified as important for flood storage or flood conveyance in a regional flood control plan?
0
Yes = 2 No = 0
Total for D 6 Add the points in the boxes above 2
Rating of Value If score is: ✔ 2-4 = H 1 = M 0 = L Record the rating on the first page
Wetland Rating System for Western WA: 2014 Update 6
Rating Form – Effective January 1, 2015
Wetland name or number ______ A
These questions apply to wetlands of all HGM classes.
HABITAT FUNCTIONS - Indicators that site functions to provide important habitat
H 1.0. Does the site have the potential to provide habitat?
H 1.1. Structure of plant community: Indicators are Cowardin classes and strata within the Forested class. Check the
Cowardin plant classes in the wetland. Up to 10 patches may be combined for each class to meet the threshold
of ¼ ac or more than 10% of the unit if it is smaller than 2.5 ac. Add the number of structures checked.
____Aquatic bed 4 structures or more: points = 4
____Emergent 3 structures: points = 2 1
____Scrub-shrub (areas where shrubs have > 30% cover) 2 structures: points = 1
____Forested (areas where trees have >✔ 30% cover) 1 structure: points = 0
If the unit has a Forested class, check if:
___✔ _The Forested class has 3 out of 5 strata (canopy, sub-canopy, shrubs, herbaceous, moss/ground-cover)
that each cover 20% within the Forested polygon
H 1.2. Hydroperiods
Check the types of water regimes (hydroperiods) present within the wetland. The water regime has to cover
more than 10% of the wetland or ¼ ac to count (see text for descriptions of hydroperiods).
____Permanently flooded or inundated 4 or more types present: points = 3
____Seasonally flooded or inundated✔ 3 types present: points = 2
____Occasionally flooded or inundated 2 types present: points = 1 1
____Saturated only✔ 1 type present: points = 0
____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
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 and you do not have to name
the species. Do not include Eurasian milfoil, reed canarygrass, purple loosestrife, Canadian thistle 1
If you counted: > 19 species points = 2
5 - 19 species points = 1
< 5 species points = 0
H 1.4. Interspersion of habitats
Decide from the diagrams below whether interspersion among Cowardin plants classes (described in H 1.1), or
the classes and unvegetated areas (can include open water or mudflats) is high, moderate, low, or none. If you
have four or more plant classes or three classes and open water, the rating is always high.
1
None = 0 points Low = 1 point Moderate = 2 points
All three diagrams
in this row
are HIGH = 3points
Wetland Rating System for Western WA: 2014 Update 13
Rating Form – Effective January 1, 2015
Wetland name or number ______ A
H 1.5. Special habitat features:
Check the habitat features that are present in the wetland. The number of checks is the number of points.
____Large, downed, woody debris within the ✔ wetland (> 4 in diameter and 6 ft long).
____Standing snags (✔ dbh > 4 in) within the wetland
____Undercut banks are present for at least 6.6 ft (2 m) and/or overhanging plants extends at least 3.3 ft (1 m)
over a stream (or ditch) in, or contiguous with the wetland, for at least 33 ft (10 m)
____Stable steep banks of fine material that might be used by beaver or muskrat for denning (> 30 degree 2
slope) OR signs of recent beaver activity are present (cut shrubs or trees that have not yet weathered
where wood is exposed)
____At least ¼ ac of thin-stemmed persistent plants or woody branches are present in areas that are
permanently or seasonally inundated (structures for egg-laying by amphibians)
____Invasive plants cover less than 25% of the wetland area in every stratum of plants (see H 1.1 for list of
strata)
Total for H 1 Add the points in the boxes above 6
Rating of Site Potential If score is: 15-18 = H 7-14 = M ✔ 0-6 = L Record the rating on the first page
H 2.0. Does the landscape have the potential to support the habitat functions of the site?
H 2.1. Accessible habitat (include only habitat that directly abuts wetland unit).
Calculate: % undisturbed habitat 25 + [(% moderate and low intensity land uses)/2] 6 = _______31 %
If total accessible habitat is:
> 1/ (33.3%) of 1 km Polygon points = 3 2
3
✔ 20-33% of 1 km Polygon points = 2
10-19% of 1 km Polygon points = 1
< 10% of 1 km Polygon points = 0
H 2.2. Undisturbed habitat in 1 km Polygon around the wetland.
Calculate: % undisturbed habitat 31 + [(% moderate and low intensity land uses)/2] 14 = _______%45
Undisturbed habitat > 50% of Polygon points = 3
✔ Undisturbed habitat 10-50% and in 1-3 patches points = 2 2
Undisturbed habitat 10-50% and > 3 patches points = 1
Undisturbed habitat < 10% of 1 km Polygon points = 0
H 2.3. Land use intensity in 1 km Polygon: If
> 50% of 1 km Polygon is high intensity land use points = (- 2) 0
✔ ≤ 50% of 1 km Polygon is high intensity points = 0
Total for H 2 Add the points in the boxes above 4
Rating of Landscape Potential If score is: ✔ 4-6 = H 1-3 = M < 1 = L Record the rating on the first page
H 3.0. Is the habitat provided by the site valuable to society?
H 3.1. Does the site provide habitat for species valued in laws, regulations, or policies? Choose only the highest score
that applies to the wetland being rated.
Site meets ANY of the following criteria: points = 2
✔ It has 3 or more priority habitats within 100 m (see next page)
 It provides habitat for Threatened or Endangered species (any plant or animal on the state or federal lists)
 It is mapped as a location for an individual WDFW priority species 2
 It is a Wetland of High Conservation Value as determined by the Department of Natural Resources
 It has been categorized as an important habitat site in a local or regional comprehensive plan, in a
Shoreline Master Plan, or in a watershed plan
Site has 1 or 2 priority habitats (listed on next page) within 100 m points = 1
Site does not meet any of the criteria above points = 0
Rating of Value If score is: ✔ 2 = H 1 = M 0 = L Record the rating on the first page
Wetland Rating System for Western WA: 2014 Update 14
Rating Form – Effective January 1, 2015
Wetland name or number ______ A
WDFW Priority Habitats
Priority habitats listed by WDFW (see complete descriptions of WDFW priority habitats, and the counties in which they can
be found, in: Washington Department of Fish and Wildlife. 2008. Priority Habitat and Species List. Olympia, Washington.
177 pp. http://wdfw.wa.gov/publications/00165/wdfw00165.pdf or access the list from here:
http://wdfw.wa.gov/conservation/phs/list/)
Count how many of the following priority habitats are within 330 ft (100 m) of the wetland unit: NOTE: This question is
independent of the land use between the wetland unit and the priority habitat.
 Aspen Stands: Pure or mixed stands of aspen greater than 1 ac (0.4 ha).
✔ Biodiversity Areas and Corridors: Areas of habitat that are relatively important to various species of native fish and
wildlife (full descriptions in WDFW PHS report).
 Herbaceous Balds: Variable size patches of grass and forbs on shallow soils over bedrock.
 Old-growth/Mature 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 8 trees/ac (20 trees/ha ) > 32 in (81 cm) dbh or > 200
years of age. Mature forests – Stands with average diameters exceeding 21 in (53 cm) 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.
 Oregon White Oak: Woodland stands of pure oak or oak/conifer associations where canopy coverage of the oak
component is important (full descriptions in WDFW PHS report p. 158 – see web link above).
✔ Riparian: The area adjacent to aquatic systems with flowing water that contains elements of both aquatic and
terrestrial ecosystems which mutually influence each other.
 Westside Prairies: Herbaceous, non-forested plant communities that can either take the form of a dry prairie or a wet
prairie (full descriptions in WDFW PHS report p. 161 – see web link above).
✔ Instream: The combination of physical, biological, and chemical processes and conditions that interact to provide
functional life history requirements for instream fish and wildlife resources.
 Nearshore: Relatively undisturbed nearshore habitats. These include Coastal Nearshore, Open Coast Nearshore, and
Puget Sound Nearshore. (full descriptions of habitats and the definition of relatively undisturbed are in WDFW report –
see web link on previous page).
 Caves: A naturally occurring cavity, recess, void, or system of interconnected passages under the earth in soils, rock,
ice, or other geological formations and is large enough to contain a human.
 Cliffs: Greater than 25 ft (7.6 m) high and occurring below 5000 ft elevation.
 Talus: Homogenous areas of rock rubble ranging in average size 0.5 - 6.5 ft (0.15 - 2.0 m), composed of basalt, andesite,
and/or sedimentary rock, including riprap slides and mine tailings. May be associated with cliffs.
✔ Snags and Logs: Trees are considered snags if they are dead or dying and exhibit sufficient decay characteristics to
enable cavity excavation/use by wildlife. Priority snags have a diameter at breast height of > 20 in (51 cm) in western
Washington and are > 6.5 ft (2 m) in height. Priority logs are > 12 in (30 cm) in diameter at the largest end, and > 20 ft
(6 m) long.
Note: All vegetated wetlands are by definition a priority habitat but are not included in this list because they are addressed
elsewhere.
Wetland Rating System for Western WA: 2014 Update 15
Rating Form – Effective January 1, 2015
Wetland name or number ______ A
CATEGORIZATION BASED ON SPECIAL CHARACTERISTICS
Wetland Type Category
Check off any criteria that apply to the wetland. Circle the category when the appropriate criteria are met.
SC 1.0. Estuarine wetlands
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= Not an estuarine wetland
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 I No - Go to SC 1.2
SC 1.2. Is the wetland unit at least 1 ac in size and meets at least two of the following three conditions?
 The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation, grazing, and has less
Cat. I
than 10% cover of non-native plant species. (If non-native species are Spartina, see page 25)
 At least ¾ of the landward edge of the wetland has a 100 ft buffer of shrub, forest, or un-grazed or un-
mowed grassland.
Cat. II
 The wetland has at least two of the following features: tidal channels, depressions with open water, or
contiguous freshwater wetlands. Yes = Category I No = Category II
SC 2.0. Wetlands of High Conservation Value (WHCV)
SC 2.1. Has the WA Department of Natural Resources updated their website to include the list of Wetlands of High
Conservation Value? Yes – Go to SC 2.2 No – Go to SC 2.3 Cat. I
SC 2.2. Is the wetland listed on the WDNR database as a Wetland of High Conservation Value?
Yes = Category I No = Not a WHCV
SC 2.3. Is the wetland in a Section/Township/Range that contains a Natural Heritage wetland?
http://www1.dnr.wa.gov/nhp/refdesk/datasearch/wnhpwetlands.pdf
Yes – Contact WNHP/WDNR and go to SC 2.4 No = Not a WHCV
SC 2.4. Has WDNR identified the wetland within the S/T/R as a Wetland of High Conservation Value and listed it on
their website? Yes = Category I No = Not a WHCV
SC 3.0. Bogs
Does the wetland (or any part of the unit) meet both the criteria for soils and vegetation in bogs? Use the key
below. If you answer YES you will still need to rate the wetland based on its functions.
SC 3.1. Does an area within the wetland unit have organic soil horizons, either peats or mucks, that compose 16 in or
more of the first 32 in of the soil profile? Yes – Go to SC 3.3 No – Go to SC 3.2
SC 3.2. Does an area within the wetland unit have organic soils, either peats or mucks, that are less than 16 in deep
over bedrock, or an impermeable hardpan such as clay or volcanic ash, or that are floating on top of a lake or
pond? Yes – Go to SC 3.3 No = Is not a bog
SC 3.3. Does an area with peats or mucks have more than 70% cover of mosses at ground level, AND at least a 30%
cover of plant species listed in Table 4? Yes = Is a Category I bog No – Go to SC 3.4
NOTE: If you are uncertain about the extent of mosses in the understory, you may substitute that criterion by
measuring the pH of the water that seeps into a hole dug at least 16 in deep. If the pH is less than 5.0 and the
plant species in Table 4 are present, the wetland is a bog. Cat. I
SC 3.4. Is an area with peats or mucks forested (> 30% cover) with Sitka spruce, subalpine fir, western red cedar,
western hemlock, lodgepole pine, quaking aspen, Engelmann spruce, or western white pine, AND any of the
species (or combination of species) listed in Table 4 provide more than 30% of the cover under the canopy?
Yes = Is a Category I bog No = Is not a bog
Wetland Rating System for Western WA: 2014 Update 16
Rating Form – Effective January 1, 2015
Wetland name or number ______ A
SC 4.0. Forested Wetlands
Does the wetland have at least 1 contiguous acre of forest that meets one of these criteria for the WA
Department of Fish and Wildlife’s forests as priority habitats? If you answer YES you will still need to rate
the wetland based on its functions.
 Old-growth forests (west of Cascade crest): Stands of at least two tree species, forming a multi-layered
canopy with occasional small openings; with at least 8 trees/ac (20 trees/ha) that are at least 200 years of
age OR have a diameter at breast height (dbh) of 32 in (81 cm) or more.
 Mature forests (west of the Cascade Crest): Stands where the largest trees are 80- 200 years old OR the
species that make up the canopy have an average diameter (dbh) exceeding 21 in (53 cm).
Yes = Category I No = Not a forested wetland for this section Cat. I
SC 5.0. Wetlands in Coastal Lagoons
Does the wetland meet all of the following criteria of a wetland in a coastal lagoon?
 The wetland lies in a depression adjacent to marine waters that is wholly or partially separated from
marine waters by sandbanks, gravel banks, shingle, or, less frequently, rocks
 The lagoon in which the wetland is located contains ponded 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) Cat. I
Yes – Go to SC 5.1 No = 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 aggressive, opportunistic plant species (see list of species on p. 100). Cat. II
 At least ¾ of the landward edge of the wetland has a 100 ft buffer of shrub, forest, or un-grazed or un-
mowed grassland.
 The wetland is larger than 1/ ac (4350 ft2)
10
Yes = Category I No = Category II
SC 6.0. Interdunal Wetlands
Is the wetland west of the 1889 line (also called the Western Boundary of Upland Ownership or WBUO)? If
you answer yes you will still need to rate the wetland based on its habitat 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 Cat I
 Ocean Shores-Copalis: Lands west of SR 115 and SR 109
Yes – Go to SC 6.1 No = not an interdunal wetland for rating
SC 6.1. Is the wetland 1 ac or larger and scores an 8 or 9 for the habitat functions on the form (rates H,H,H or H,H,M Cat. II
for the three aspects of function)? Yes = Category I No – Go to SC 6.2
SC 6.2. Is the wetland 1 ac or larger, or is it in a mosaic of wetlands that is 1 ac or larger?
Yes = Category II No – Go to SC 6.3 Cat. III
SC 6.3. Is the unit between 0.1 and 1 ac, or is it in a mosaic of wetlands that is between 0.1 and 1 ac?
Yes = Category III No = Category IV
Cat. IV
Category of wetland based on Special Characteristics
N/A
If you answered No for all types, enter “Not Applicable†on Summary Form
Wetland Rating System for Western WA: 2014 Update 17
Rating Form – Effective January 1, 2015
Wetland name or number ______ A
This page left blank intentionally
Wetland Rating System for Western WA: 2014 Update 18
Rating Form – Effective January 1, 2015
PUD - EAST ARLINGTON-OSO 115KV REBUILD
WETLAND RATING FIGURE 1- WETLAND A
Scale 1" = 200'
0 100 200 300 400
LEGEND
FORESTED VEGETATION
SATURATED ONLY
SEASONALLY FLOODED
WETLAND RATING
Delineation / Mitigation / Restoration / Habitat Creation / Permit Assistance Wetland A
150' FROM WL BOUNDARY 9505 19th Avenue S.E. Suite 106 Everett,Washington 98208
Phone: (425) 337-3174 PUD No. 1 Snohomish County
Fax: (425) 337-3045 Attn: Alex Chorey Figure A-1
PERENNIAL STREAM Email: mailbox@wetlandresources.com PO Box 1107 WRI Job # 17299
Everett, WA 98026 Rated by: JL
PUD - EAST ARLINGTON-OSO 115KV REBUILD
WETLAND RATING FIGURE 2- WETLAND A
LEGEND
RELATIVELY
UNDISTURBED
LOW/MOD.
INTENSITY
HIGH
INTENSITY CONTRIBUTING BASIN
Scale 1" = 1,000'
ACCESSIBLE AREA RELATIVE TO
HABITAT WETLAND UNIT IS 111:1
0 1,000 2,000
WETLAND
WETLAND RATING
1 KM FROM Delineation / Mitigation / Restoration / Habitat Creation / Permit Assistance Wetland A
WETLAND 9505 19th Avenue S.E. Suite 106 Everett,Washington 98208 PUD No. 1 Snohomish County
Phone: (425) 337-3174
CONTRIBUTING Fax: (425) 337-3045 Attn: Alex Chorey Figure A-2
Email: mailbox@wetlandresources.com PO Box 1107 WRI Job # 17299
BASIN
Everett, WA 98026 Rated by: JL
PUD - EAST ARLINGTON-OSO 115KV REBUILD
WETLAND RATING FIGURE 3- WETLAND A
SOUTH FORK STILLAGUAMISH
WETLAND DRAINS DIRECTLY TO
EAGLE CREEK, THEN
SOUTH FORK STILLAGUAMISH
Scale 1" = 2,000'
0 2,000 4,000
LEGEND
WETLAND
WETLAND RATING
AQUATIC RESOURCES Delineation / Mitigation / Restoration / Habitat Creation / Permit Assistance Wetland A
9505 19th Avenue S.E. Suite 106 Everett,Washington 98208
ON THE 303(d) LIST Phone: (425) 337-3174 PUD No. 1 Snohomish County
Fax: (425) 337-3045 Attn: Alex Chorey Figure A-3
Email: mailbox@wetlandresources.com PO Box 1107 WRI Job # 17299
Everett, WA 98026 Rated by: JL
PUD - EAST ARLINGTON-OSO 115KV REBUILD
WETLAND RATING FIGURE 4- WETLAND A
WETLAND RATING
Delineation / Mitigation / Restoration / Habitat Creation / Permit Assistance Wetland A
9505 19th Avenue S.E. Suite 106 Everett,Washington 98208
Phone: (425) 337-3174 PUD No. 1 Snohomish County
Fax: (425) 337-3045 Attn: Alex Chorey Figure A-4
Email: mailbox@wetlandresources.com PO Box 1107 WRI Job # 17299
Everett, WA 98026 Rated by: JL
Wetland name or number ______ B
RATING SUMMARY – Western Washington
Name of wetland (or ID #): _________________________________ Date of site visit: _____ Wetland B 10/24/17
Rated by____________________________ Trained by Ecology?__ Yes ___No Date of training______ JL&ED ✔ Sept2014
HGM Class used for rating_________________ DEPRESSIONAL Wetland has multiple HGM classes?___Y ____N✔
NOTE: Form is not complete without the figures requested (figures can be combined).
Source of base aerial photo/map ______________________________________ ESRI
OVERALL WETLAND CATEGORY ____ III (based on functions___ or special characteristics___) ✔
1. Category of wetland based on FUNCTIONS
_______Category I – Total score = 23 - 27
Score for each
_______Category II – Total score = 20 - 22 function based
on three
_______✔ Category III – Total score = 16 - 19 ratings
_______Category IV – Total score = 9 - 15 (order of ratings
is not
important)
FUNCTION Improving Hydrologic Habitat
Water Quality
9 = H,H,H
Circle the appropriate ratings
8 = H,H,M
Site Potential H M L H M L H M L 7 = H,H,L
Landscape Potential H M L H M L H M L 7 = H,M,M
Value H M L H M L H M L TOTAL 6 = H,M,L
6 = M,M,M
Score Based on
7 7 5 19 5 = H,L,L
Ratings
5 = M,M,L
4 = M,L,L
3 = L,L,L
2. Category based on SPECIAL CHARACTERISTICS of wetland
CHARACTERISTIC CATEGORY
Estuarine I II
Wetland of High Conservation Value I
Bog I
Mature Forest I
Old Growth Forest I
Coastal Lagoon I II
Interdunal I II III IV
None of the above ✔
Wetland Rating System for Western WA: 2014 Update 1
Rating Form – Effective January 1, 2015
Wetland name or number ______ B
Maps and figures required to answer questions correctly for
Western Washington
Depressional Wetlands
Map of: To answer questions: Figure #
Cowardin plant classes D 1.3, H 1.1, H 1.4 1
Hydroperiods D 1.4, H 1.2 1
Location of outlet (can be added to map of hydroperiods) D 1.1, D 4.1 1
Boundary of area within 150 ft of the wetland (can be added to another figure) D 2.2, D 5.2 1
Map of the contributing basin D 4.3, D 5.3 2
1 km Polygon: Area that extends 1 km from entire wetland edge - including H 2.1, H 2.2, H 2.3
2
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website) D 3.1, D 3.2 3
Screen capture of list of TMDLs for WRIA in which unit is found (from web) D 3.3 4
Riverine Wetlands
Map of: To answer questions: Figure #
Cowardin plant classes H 1.1, H 1.4
Hydroperiods H 1.2
Ponded depressions R 1.1
Boundary of area within 150 ft of the wetland (can be added to another figure) R 2.4
Plant cover of trees, shrubs, and herbaceous plants R 1.2, R 4.2
Width of unit vs. width of stream (can be added to another figure) R 4.1
Map of the contributing basin R 2.2, R 2.3, R 5.2
1 km Polygon: Area that extends 1 km from entire wetland edge - including H 2.1, H 2.2, H 2.3
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website) R 3.1
Screen capture of list of TMDLs for WRIA in which unit is found (from web) R 3.2, R 3.3
Lake Fringe Wetlands
Map of: To answer questions: Figure #
Cowardin plant classes L 1.1, L 4.1, H 1.1, H 1.4
Plant cover of trees, shrubs, and herbaceous plants L 1.2
Boundary of area within 150 ft of the wetland (can be added to another figure) L 2.2
1 km Polygon: Area that extends 1 km from entire wetland edge - including H 2.1, H 2.2, H 2.3
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website) L 3.1, L 3.2
Screen capture of list of TMDLs for WRIA in which unit is found (from web) L 3.3
Slope Wetlands
Map of: To answer questions: Figure #
Cowardin plant classes H 1.1, H 1.4
Hydroperiods H 1.2
Plant cover of dense trees, shrubs, and herbaceous plants S 1.3
Plant cover of dense, rigid trees, shrubs, and herbaceous plants S 4.1
(can be added to figure above)
Boundary of 150 ft buffer (can be added to another figure) S 2.1, S 5.1
1 km Polygon: Area that extends 1 km from entire wetland edge - including H 2.1, H 2.2, H 2.3
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website) S 3.1, S 3.2
Screen capture of list of TMDLs for WRIA in which unit is found (from web) S 3.3
Wetland Rating System for Western WA: 2014 Update 2
Rating Form – Effective January 1, 2015
Wetland name or number ______ B
HGM Classification of Wetlands in Western Washington
For questions 1-7, the criteria described must apply to the entire unit being rated.
If the hydrologic criteria listed in each question do not apply to the entire unit being rated, you
probably have a unit with multiple HGM classes. In this case, identify which hydrologic criteria in
questions 1-7 apply, and go to Question 8.
1. Are the water levels in the entire unit usually controlled by tides except during floods?
NO – go to 2 YES – the wetland class is Tidal Fringe – go to 1.1
1.1 Is the salinity of the water during periods of annual low flow below 0.5 ppt (parts per thousand)?
NO – Saltwater Tidal Fringe (Estuarine) YES – Freshwater Tidal Fringe
If your wetland can be classified as a Freshwater Tidal Fringe use the forms for Riverine wetlands. If it
is Saltwater Tidal Fringe it is an Estuarine wetland and is not scored. This method cannot be used to
score functions for estuarine wetlands.
2. The entire wetland unit is flat and precipitation is the only source (>90%) of water to it. Groundwater
and surface water runoff are NOT sources of water to the unit.
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 entire wetland unit meet all of the following criteria?
___The vegetated part of the wetland is on the shores of a body of permanent open water (without any
plants on the surface at any time of the year) at least 20 ac (8 ha) in size;
___At least 30% of the open water area is deeper than 6.6 ft (2 m).
NO – go to 4 YES – The wetland class is Lake Fringe (Lacustrine Fringe)
4. Does the entire wetland unit meet all of the following criteria?
____The wetland is on a slope (slope can be very gradual),
____The water flows through the wetland in one direction (unidirectional) and usually comes from
seeps. It may flow subsurface, as sheetflow, or in a swale without distinct banks,
____The water leaves the wetland without being impounded.
NO – go to 5 YES – The wetland class is Slope
NOTE: Surface water does not pond in these type of wetlands except occasionally in very small and
shallow depressions or behind hummocks (depressions are usually <3 ft diameter and less than 1 ft
deep).
5. Does the entire wetland unit meet all of the following criteria?
____The unit is in a valley, or stream channel, where it gets inundated by overbank flooding from that
stream or river,
____The overbank flooding occurs at least once every 2 years.
Wetland Rating System for Western WA: 2014 Update 3
Rating Form – Effective January 1, 2015
Wetland name or number ______ B
NO – go to 6 YES – The wetland class is Riverine
NOTE: The Riverine unit can contain depressions that are filled with water when the river is not
flooding
6. Is the entire wetland unit in a topographic depression in which water ponds, or is saturated to the
surface, at some time during the year? This means that any outlet, if present, is higher than the interior
of the wetland.
NO – go to 7 YES – The wetland class is Depressional
7. Is the entire wetland unit located in a very flat area with no obvious depression and no overbank
flooding? The unit does not pond surface water more than a few inches. The unit seems to be
maintained by high groundwater in the area. The wetland may be ditched, but has no obvious natural
outlet.
NO – go to 8 YES – The wetland class is Depressional
8. Your wetland unit seems to be difficult to classify and probably contains several different HGM
classes. For example, seeps at the base of a slope may grade into a riverine floodplain, or a small
stream within a Depressional wetland has a zone of flooding along its sides. GO BACK AND IDENTIFY
WHICH OF THE HYDROLOGIC REGIMES DESCRIBED IN QUESTIONS 1-7 APPLY TO DIFFERENT
AREAS IN THE UNIT (make a rough sketch to help you decide). Use the following table to identify the
appropriate class to use for the rating system if you have several HGM classes present within the
wetland unit being scored.
NOTE: Use this table only if the class that is recommended in the second column represents 10% or
more of the total area of the wetland unit being rated. If the area of the HGM class listed in column 2
is less than 10% of the unit; classify the wetland using the class that represents more than 90% of the
total area.
HGM classes within the wetland unit HGM class to
being rated use in rating
Slope + Riverine Riverine
Slope + Depressional Depressional
Slope + Lake Fringe Lake Fringe
Depressional + Riverine along stream Depressional
within boundary of depression
Depressional + Lake Fringe Depressional
Riverine + Lake Fringe Riverine
Salt Water Tidal Fringe and any other Treat as
class of freshwater wetland ESTUARINE
If you are still unable to determine which of the above criteria apply to your wetland, or if you have
more than 2 HGM classes within a wetland boundary, classify the wetland as Depressional for the
rating.
Wetland Rating System for Western WA: 2014 Update 4
Rating Form – Effective January 1, 2015
Wetland name or number ______ B
DEPRESSIONAL AND FLATS WETLANDS
Water Quality Functions - Indicators that the site functions to improve water quality
D 1.0. Does the site have the potential to improve water quality?
D 1.1. Characteristics of surface water outflows from the wetland:
Wetland is a depression or flat depression (QUESTION 7 on key) with no surface water leaving it (no outlet).
points = 3
✔ Wetland has an intermittently flowing stream or ditch, OR highly constricted permanently flowing outlet. 2
points = 2
Wetland has an unconstricted, or slightly constricted, surface outlet that is permanently flowing points = 1
Wetland is a flat depression (QUESTION 7 on key), whose outlet is a permanently flowing ditch. points = 1
D 1.2. The soil 2 in below the surface (or duff layer) is true clay or true organic (use NRCS definitions).Yes = 4 No = 0 0
D 1.3. Characteristics and distribution of persistent plants (Emergent, Scrub-shrub, and/or Forested Cowardin classes):
Wetland has persistent, ungrazed, plants > 95% of area points = 5
✔ Wetland has persistent, ungrazed, plants > ½ of area points = 3 3
Wetland has persistent, ungrazed plants > 1/ of area points = 1
10
Wetland has persistent, ungrazed plants <1/ of area points = 0
10
D 1.4. Characteristics of seasonal ponding or inundation:
This is the area that is ponded for at least 2 months. See description in manual.
✔ Area seasonally ponded is > ½ total area of wetland points = 4 4
Area seasonally ponded is > ¼ total area of wetland points = 2
Area seasonally ponded is < ¼ total area of wetland points = 0
Total for D 1 Add the points in the boxes above 9
Rating of Site Potential If score is: 12-16 = H ✔ 6-11 = M 0-5 = L Record the rating on the first page
D 2.0. Does the landscape have the potential to support the water quality function of the site?
D 2.1. Does the wetland unit receive stormwater discharges? Yes = 1 No = 0 1
D 2.2. Is > 10% of the area within 150 ft of the wetland in land uses that generate pollutants? Yes = 1 No = 0 1
D 2.3. Are there septic systems within 250 ft of the wetland? Yes = 1 No = 0 0
D 2.4. Are there other sources of pollutants coming into the wetland that are not listed in questions D 2.1-D 2.3?
0
Source_______________ Yes = 1 No = 0
Total for D 2 Add the points in the boxes above 2
Rating of Landscape Potential If score is: 3 or 4 = H ✔ 1 or 2 = M 0 = L Record the rating on the first page
D 3.0. Is the water quality improvement provided by the site valuable to society?
D 3.1. Does the wetland discharge directly (i.e., within 1 mi) to a stream, river, lake, or marine water that is on the
303(d) list? Yes = 1 No = 0 0
D 3.2. Is the wetland in a basin or sub-basin where an aquatic resource is on the 303(d) list? Yes = 1 No = 0 1
D 3.3. Has the site been identified in a watershed or local plan as important for maintaining water quality (answer YES
2
if there is a TMDL for the basin in which the unit is found)? Yes = 2 No = 0
Total for D 3 Add the points in the boxes above 3
Rating of Value If score is: ✔ 2-4 = H 1 = M 0 = L Record the rating on the first page
Wetland Rating System for Western WA: 2014 Update 5
Rating Form – Effective January 1, 2015
Wetland name or number ______ B
DEPRESSIONAL AND FLATS WETLANDS
Hydrologic Functions - Indicators that the site functions to reduce flooding and stream degradation
D 4.0. Does the site have the potential to reduce flooding and erosion?
D 4.1. Characteristics of surface water outflows from the wetland:
Wetland is a depression or flat depression with no surface water leaving it (no outlet) points = 4
✔ Wetland has an intermittently flowing stream or ditch, OR highly constricted permanently flowing outletpoints = 2 2
Wetland is a flat depression (QUESTION 7 on key), whose outlet is a permanently flowing ditch points = 1
Wetland has an unconstricted, or slightly constricted, surface outlet that is permanently flowing points = 0
D 4.2. Depth of storage during wet periods: Estimate the height of ponding above the bottom of the outlet. For wetlands
with no outlet, measure from the surface of permanent water or if dry, the deepest part.
Marks of ponding are 3 ft or more above the surface or bottom of outlet points = 7
Marks of ponding between 2 ft to < 3 ft from surface or bottom of outlet points = 5 3
✔ Marks are at least 0.5 ft to < 2 ft from surface or bottom of outlet points = 3
The wetland is a “headwater†wetland points = 3
Wetland is flat but has small depressions on the surface that trap water points = 1
Marks of ponding less than 0.5 ft (6 in) points = 0
D 4.3. Contribution of the wetland to storage in the watershed: Estimate the ratio of the area of upstream basin
contributing surface water to the wetland to the area of the wetland unit itself.
The area of the basin is less than 10 times the area of the unit points = 5
3
✔ The area of the basin is 10 to 100 times the area of the unit points = 3
The area of the basin is more than 100 times the area of the unit points = 0
Entire wetland is in the Flats class points = 5
Total for D 4 Add the points in the boxes above 8
Rating of Site Potential If score is: 12-16 = H ✔ 6-11 = M 0-5 = L Record the rating on the first page
D 5.0. Does the landscape have the potential to support hydrologic functions of the site?
D 5.1. Does the wetland receive stormwater discharges? Yes = 1 No = 0 1
D 5.2. Is >10% of the area within 150 ft of the wetland in land uses that generate excess runoff? Yes = 1 No = 0 1
D 5.3. Is more than 25% of the contributing basin of the wetland covered with intensive human land uses (residential at 1
>1 residence/ac, urban, commercial, agriculture, etc.)? Yes = 1 No = 0
Total for D 5 Add the points in the boxes above 3
Rating of Landscape Potential If score is: ✔ 3 = H 1 or 2 = M 0 = L Record the rating on the first page
D 6.0. Are the hydrologic functions provided by the site valuable to society?
D 6.1. The unit is in a landscape that has flooding problems. Choose the description that best matches conditions around
the wetland unit being rated. Do not add points. Choose the highest score if more than one condition is met.
The wetland captures surface water that would otherwise flow down-gradient into areas where flooding has
damaged human or natural resources (e.g., houses or salmon redds):
ï‚· Flooding occurs in a sub-basin that is immediately down-gradient of unit. points = 2
✔  Surface flooding problems are in a sub-basin farther down-gradient. points = 1 1
Flooding from groundwater is an issue in the sub-basin. points = 1
The existing or potential outflow from the wetland is so constrained by human or natural conditions that the
water stored by the wetland cannot reach areas that flood. Explain why _____________ points = 0
There are no problems with flooding downstream of the wetland. points = 0
D 6.2. Has the site been identified as important for flood storage or flood conveyance in a regional flood control plan?
0
Yes = 2 No = 0
Total for D 6 Add the points in the boxes above 1
Rating of Value If score is: 2-4 = H ✔ 1 = M 0 = L Record the rating on the first page
Wetland Rating System for Western WA: 2014 Update 6
Rating Form – Effective January 1, 2015
Wetland name or number ______ B
These questions apply to wetlands of all HGM classes.
HABITAT FUNCTIONS - Indicators that site functions to provide important habitat
H 1.0. Does the site have the potential to provide habitat?
H 1.1. Structure of plant community: Indicators are Cowardin classes and strata within the Forested class. Check the
Cowardin plant classes in the wetland. Up to 10 patches may be combined for each class to meet the threshold
of ¼ ac or more than 10% of the unit if it is smaller than 2.5 ac. Add the number of structures checked.
____Aquatic bed 4 structures or more: points = 4
____Emergent 3 structures: points = 2 0
____✔ Scrub-shrub (areas where shrubs have > 30% cover) 2 structures: points = 1
____Forested (areas where trees have > 30% cover) 1 structure: points = 0
If the unit has a Forested class, check if:
____The Forested class has 3 out of 5 strata (canopy, sub-canopy, shrubs, herbaceous, moss/ground-cover)
that each cover 20% within the Forested polygon
H 1.2. Hydroperiods
Check the types of water regimes (hydroperiods) present within the wetland. The water regime has to cover
more than 10% of the wetland or ¼ ac to count (see text for descriptions of hydroperiods).
____Permanently flooded or inundated 4 or more types present: points = 3
____Seasonally flooded or inundated✔ 3 types present: points = 2
____Occasionally flooded or inundated 2 types present: points = 1
____Saturated only 1 type present: points = 0
____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
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 and you do not have to name
the species. Do not include Eurasian milfoil, reed canarygrass, purple loosestrife, Canadian thistle 1
If you counted: > 19 species points = 2
5 - 19 species points = 1
< 5 species points = 0
H 1.4. Interspersion of habitats
Decide from the diagrams below whether interspersion among Cowardin plants classes (described in H 1.1), or
the classes and unvegetated areas (can include open water or mudflats) is high, moderate, low, or none. If you
have four or more plant classes or three classes and open water, the rating is always high.
0
None = 0 points Low = 1 point Moderate = 2 points
All three diagrams
in this row
are HIGH = 3points
Wetland Rating System for Western WA: 2014 Update 13
Rating Form – Effective January 1, 2015
Wetland name or number ______ B
H 1.5. Special habitat features:
Check the habitat features that are present in the wetland. The number of checks is the number of points.
____Large, downed, woody debris within the wetland (> 4 in diameter and 6 ft long).
____Standing snags (dbh > 4 in) within the wetland
____Undercut banks are present for at least 6.6 ft (2 m) and/or overhanging plants extends at least 3.3 ft (1 m)
over a stream (or ditch) in, or contiguous with the wetland, for at least 33 ft (10 m)
____Stable steep banks of fine material that might be used by beaver or muskrat for denning (> 30 degree 0
slope) OR signs of recent beaver activity are present (cut shrubs or trees that have not yet weathered
where wood is exposed)
____At least ¼ ac of thin-stemmed persistent plants or woody branches are present in areas that are
permanently or seasonally inundated (structures for egg-laying by amphibians)
____Invasive plants cover less than 25% of the wetland area in every stratum of plants (see H 1.1 for list of
strata)
Total for H 1 Add the points in the boxes above 1
Rating of Site Potential If score is: 15-18 = H 7-14 = M ✔ 0-6 = L Record the rating on the first page
H 2.0. Does the landscape have the potential to support the habitat functions of the site?
H 2.1. Accessible habitat (include only habitat that directly abuts wetland unit).
Calculate: % undisturbed habitat 1 + [(% moderate and low intensity land uses)/2] 0 = _______1 %
If total accessible habitat is:
> 1/ (33.3%) of 1 km Polygon points = 3 0
3
20-33% of 1 km Polygon points = 2
10-19% of 1 km Polygon points = 1
✔ < 10% of 1 km Polygon points = 0
H 2.2. Undisturbed habitat in 1 km Polygon around the wetland.
Calculate: % undisturbed habitat 23 + [(% moderate and low intensity land uses)/2] 11 = _______%34
Undisturbed habitat > 50% of Polygon points = 3
✔ Undisturbed habitat 10-50% and in 1-3 patches points = 2 2
Undisturbed habitat 10-50% and > 3 patches points = 1
Undisturbed habitat < 10% of 1 km Polygon points = 0
H 2.3. Land use intensity in 1 km Polygon: If
> 50% of 1 km Polygon is high intensity land use points = (- 2) 0
✔ ≤ 50% of 1 km Polygon is high intensity points = 0
Total for H 2 Add the points in the boxes above 2
Rating of Landscape Potential If score is: 4-6 = H ✔ 1-3 = M < 1 = L Record the rating on the first page
H 3.0. Is the habitat provided by the site valuable to society?
H 3.1. Does the site provide habitat for species valued in laws, regulations, or policies? Choose only the highest score
that applies to the wetland being rated.
Site meets ANY of the following criteria: points = 2
 It has 3 or more priority habitats within 100 m (see next page)
 It provides habitat for Threatened or Endangered species (any plant or animal on the state or federal lists)
 It is mapped as a location for an individual WDFW priority species 2
 It is a Wetland of High Conservation Value as determined by the Department of Natural Resources
 It has been categorized as an important habitat site in a local or regional comprehensive plan, in a
Shoreline Master Plan, or in a watershed plan
✔ Site has 1 or 2 priority habitats (listed on next page) within 100 m points = 1
Site does not meet any of the criteria above points = 0
Rating of Value If score is: 2 = H ✔ 1 = M 0 = L Record the rating on the first page
Wetland Rating System for Western WA: 2014 Update 14
Rating Form – Effective January 1, 2015
Wetland name or number ______ B
WDFW Priority Habitats
Priority habitats listed by WDFW (see complete descriptions of WDFW priority habitats, and the counties in which they can
be found, in: Washington Department of Fish and Wildlife. 2008. Priority Habitat and Species List. Olympia, Washington.
177 pp. http://wdfw.wa.gov/publications/00165/wdfw00165.pdf or access the list from here:
http://wdfw.wa.gov/conservation/phs/list/)
Count how many of the following priority habitats are within 330 ft (100 m) of the wetland unit: NOTE: This question is
independent of the land use between the wetland unit and the priority habitat.
 Aspen Stands: Pure or mixed stands of aspen greater than 1 ac (0.4 ha).
 Biodiversity Areas and Corridors: Areas of habitat that are relatively important to various species of native fish and
wildlife (full descriptions in WDFW PHS report).
 Herbaceous Balds: Variable size patches of grass and forbs on shallow soils over bedrock.
 Old-growth/Mature 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 8 trees/ac (20 trees/ha ) > 32 in (81 cm) dbh or > 200
years of age. Mature forests – Stands with average diameters exceeding 21 in (53 cm) 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.
 Oregon White Oak: Woodland stands of pure oak or oak/conifer associations where canopy coverage of the oak
component is important (full descriptions in WDFW PHS report p. 158 – see web link above).
✔ Riparian: The area adjacent to aquatic systems with flowing water that contains elements of both aquatic and
terrestrial ecosystems which mutually influence each other.
 Westside Prairies: Herbaceous, non-forested plant communities that can either take the form of a dry prairie or a wet
prairie (full descriptions in WDFW PHS report p. 161 – see web link above).
✔ Instream: The combination of physical, biological, and chemical processes and conditions that interact to provide
functional life history requirements for instream fish and wildlife resources.
 Nearshore: Relatively undisturbed nearshore habitats. These include Coastal Nearshore, Open Coast Nearshore, and
Puget Sound Nearshore. (full descriptions of habitats and the definition of relatively undisturbed are in WDFW report –
see web link on previous page).
 Caves: A naturally occurring cavity, recess, void, or system of interconnected passages under the earth in soils, rock,
ice, or other geological formations and is large enough to contain a human.
 Cliffs: Greater than 25 ft (7.6 m) high and occurring below 5000 ft elevation.
 Talus: Homogenous areas of rock rubble ranging in average size 0.5 - 6.5 ft (0.15 - 2.0 m), composed of basalt, andesite,
and/or sedimentary rock, including riprap slides and mine tailings. May be associated with cliffs.
 Snags and Logs: Trees are considered snags if they are dead or dying and exhibit sufficient decay characteristics to
enable cavity excavation/use by wildlife. Priority snags have a diameter at breast height of > 20 in (51 cm) in western
Washington and are > 6.5 ft (2 m) in height. Priority logs are > 12 in (30 cm) in diameter at the largest end, and > 20 ft
(6 m) long.
Note: All vegetated wetlands are by definition a priority habitat but are not included in this list because they are addressed
elsewhere.
Wetland Rating System for Western WA: 2014 Update 15
Rating Form – Effective January 1, 2015
Wetland name or number ______ B
CATEGORIZATION BASED ON SPECIAL CHARACTERISTICS
Wetland Type Category
Check off any criteria that apply to the wetland. Circle the category when the appropriate criteria are met.
SC 1.0. Estuarine wetlands
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= Not an estuarine wetland
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 I No - Go to SC 1.2
SC 1.2. Is the wetland unit at least 1 ac in size and meets at least two of the following three conditions?
 The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation, grazing, and has less
Cat. I
than 10% cover of non-native plant species. (If non-native species are Spartina, see page 25)
 At least ¾ of the landward edge of the wetland has a 100 ft buffer of shrub, forest, or un-grazed or un-
mowed grassland.
Cat. II
 The wetland has at least two of the following features: tidal channels, depressions with open water, or
contiguous freshwater wetlands. Yes = Category I No = Category II
SC 2.0. Wetlands of High Conservation Value (WHCV)
SC 2.1. Has the WA Department of Natural Resources updated their website to include the list of Wetlands of High
Conservation Value? Yes – Go to SC 2.2 No – Go to SC 2.3 Cat. I
SC 2.2. Is the wetland listed on the WDNR database as a Wetland of High Conservation Value?
Yes = Category I No = Not a WHCV
SC 2.3. Is the wetland in a Section/Township/Range that contains a Natural Heritage wetland?
http://www1.dnr.wa.gov/nhp/refdesk/datasearch/wnhpwetlands.pdf
Yes – Contact WNHP/WDNR and go to SC 2.4 No = Not a WHCV
SC 2.4. Has WDNR identified the wetland within the S/T/R as a Wetland of High Conservation Value and listed it on
their website? Yes = Category I No = Not a WHCV
SC 3.0. Bogs
Does the wetland (or any part of the unit) meet both the criteria for soils and vegetation in bogs? Use the key
below. If you answer YES you will still need to rate the wetland based on its functions.
SC 3.1. Does an area within the wetland unit have organic soil horizons, either peats or mucks, that compose 16 in or
more of the first 32 in of the soil profile? Yes – Go to SC 3.3 No – Go to SC 3.2
SC 3.2. Does an area within the wetland unit have organic soils, either peats or mucks, that are less than 16 in deep
over bedrock, or an impermeable hardpan such as clay or volcanic ash, or that are floating on top of a lake or
pond? Yes – Go to SC 3.3 No = Is not a bog
SC 3.3. Does an area with peats or mucks have more than 70% cover of mosses at ground level, AND at least a 30%
cover of plant species listed in Table 4? Yes = Is a Category I bog No – Go to SC 3.4
NOTE: If you are uncertain about the extent of mosses in the understory, you may substitute that criterion by
measuring the pH of the water that seeps into a hole dug at least 16 in deep. If the pH is less than 5.0 and the
plant species in Table 4 are present, the wetland is a bog. Cat. I
SC 3.4. Is an area with peats or mucks forested (> 30% cover) with Sitka spruce, subalpine fir, western red cedar,
western hemlock, lodgepole pine, quaking aspen, Engelmann spruce, or western white pine, AND any of the
species (or combination of species) listed in Table 4 provide more than 30% of the cover under the canopy?
Yes = Is a Category I bog No = Is not a bog
Wetland Rating System for Western WA: 2014 Update 16
Rating Form – Effective January 1, 2015
Wetland name or number ______ B
SC 4.0. Forested Wetlands
Does the wetland have at least 1 contiguous acre of forest that meets one of these criteria for the WA
Department of Fish and Wildlife’s forests as priority habitats? If you answer YES you will still need to rate
the wetland based on its functions.
 Old-growth forests (west of Cascade crest): Stands of at least two tree species, forming a multi-layered
canopy with occasional small openings; with at least 8 trees/ac (20 trees/ha) that are at least 200 years of
age OR have a diameter at breast height (dbh) of 32 in (81 cm) or more.
 Mature forests (west of the Cascade Crest): Stands where the largest trees are 80- 200 years old OR the
species that make up the canopy have an average diameter (dbh) exceeding 21 in (53 cm).
Yes = Category I No = Not a forested wetland for this section Cat. I
SC 5.0. Wetlands in Coastal Lagoons
Does the wetland meet all of the following criteria of a wetland in a coastal lagoon?
 The wetland lies in a depression adjacent to marine waters that is wholly or partially separated from
marine waters by sandbanks, gravel banks, shingle, or, less frequently, rocks
 The lagoon in which the wetland is located contains ponded 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) Cat. I
Yes – Go to SC 5.1 No = 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 aggressive, opportunistic plant species (see list of species on p. 100). Cat. II
 At least ¾ of the landward edge of the wetland has a 100 ft buffer of shrub, forest, or un-grazed or un-
mowed grassland.
 The wetland is larger than 1/ ac (4350 ft2)
10
Yes = Category I No = Category II
SC 6.0. Interdunal Wetlands
Is the wetland west of the 1889 line (also called the Western Boundary of Upland Ownership or WBUO)? If
you answer yes you will still need to rate the wetland based on its habitat 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 Cat I
 Ocean Shores-Copalis: Lands west of SR 115 and SR 109
Yes – Go to SC 6.1 No = not an interdunal wetland for rating
SC 6.1. Is the wetland 1 ac or larger and scores an 8 or 9 for the habitat functions on the form (rates H,H,H or H,H,M Cat. II
for the three aspects of function)? Yes = Category I No – Go to SC 6.2
SC 6.2. Is the wetland 1 ac or larger, or is it in a mosaic of wetlands that is 1 ac or larger?
Yes = Category II No – Go to SC 6.3 Cat. III
SC 6.3. Is the unit between 0.1 and 1 ac, or is it in a mosaic of wetlands that is between 0.1 and 1 ac?
Yes = Category III No = Category IV
Cat. IV
Category of wetland based on Special Characteristics
N/A
If you answered No for all types, enter “Not Applicable†on Summary Form
Wetland Rating System for Western WA: 2014 Update 17
Rating Form – Effective January 1, 2015
Wetland name or number ______ B
This page left blank intentionally
Wetland Rating System for Western WA: 2014 Update 18
Rating Form – Effective January 1, 2015
PUD - EAST ARLINGTON-OSO 115KV REBUILD
WETLAND RATING FIGURE 1- WETLAND B
Scale 1" = 100'
0 50 100 150 200
LEGEND
SCRUB-SHRUB
WETLAND RATING
SEASONALLY FLOODED Delineation / Mitigation / Restoration / Habitat Creation / Permit Assistance Wetland B
9505 19th Avenue S.E. Suite 106 Everett,Washington 98208
Phone: (425) 337-3174 PUD No. 1 Snohomish County
150' FROM WL BOUNDARY Fax: (425) 337-3045 Attn: Alex Chorey Figure B-1
Email: mailbox@wetlandresources.com PO Box 1107 WRI Job # 17299
Everett, WA 98026 Rated by: JL
PUD - EAST ARLINGTON-OSO 115KV REBUILD
WETLAND RATING FIGURE 2- WETLAND B
LEGEND
RELATIVELY
UNDISTURBED
LOW/MOD.
INTENSITY
HIGH
INTENSITY CONTRIBUTING BASIN Scale 1" = 1,000'
ACCESSIBLE AREA RELATIVE TO
HABITAT WETLAND UNIT IS 22:1 0 1,000 2,000
WETLAND
WETLAND RATING
1 KM FROM Delineation / Mitigation / Restoration / Habitat Creation / Permit Assistance Wetland B
WETLAND 9505 19th Avenue S.E. Suite 106 Everett,Washington 98208 PUD No. 1 Snohomish County
Phone: (425) 337-3174
CONTRIBUTING Fax: (425) 337-3045 Attn: Alex Chorey Figure B-2
Email: mailbox@wetlandresources.com PO Box 1107 WRI Job # 17299
BASIN
Everett, WA 98026 Rated by: JL
PUD - EAST ARLINGTON-OSO 115KV REBUILD
WETLAND RATING FIGURE 3- WETLAND B
SOUTH FORK STILLAGUAMISH
WETLAND DRAINS DIRECTLY TO
EAGLE CREEK, THEN
SOUTH FORK STILLAGUAMISH
Scale 1" = 2,000'
0 2,000 4,000
LEGEND
WETLAND
WETLAND RATING
AQUATIC RESOURCES Delineation / Mitigation / Restoration / Habitat Creation / Permit Assistance Wetland B
9505 19th Avenue S.E. Suite 106 Everett,Washington 98208
ON THE 303(d) LIST Phone: (425) 337-3174 PUD No. 1 Snohomish County
Fax: (425) 337-3045 Attn: Alex Chorey Figure B-3
Email: mailbox@wetlandresources.com PO Box 1107 WRI Job # 17299
Everett, WA 98026 Rated by: JL
PUD - EAST ARLINGTON-OSO 115KV REBUILD
WETLAND RATING FIGURE 4- WETLAND B
WETLAND RATING
Delineation / Mitigation / Restoration / Habitat Creation / Permit Assistance Wetland B
9505 19th Avenue S.E. Suite 106 Everett,Washington 98208
Phone: (425) 337-3174 PUD No. 1 Snohomish County
Fax: (425) 337-3045 Attn: Alex Chorey Figure B-4
Email: mailbox@wetlandresources.com PO Box 1107 WRI Job # 17299
Everett, WA 98026 Rated by: JL
Wetland name or number ______ C
RATING SUMMARY – Western Washington
Name of wetland (or ID #): _________________________________ Date of site visit: _____ Wetland C 10/24/17
Rated by____________________________ Trained by Ecology?__ Yes ___No Date of training______ JL&ED ✔ Sept2015
HGM Class used for rating_________________ DEPRESSIONAL Wetland has multiple HGM classes?___Y ____N✔
NOTE: Form is not complete without the figures requested (figures can be combined).
Source of base aerial photo/map ______________________________________ Snohomish County
OVERALL WETLAND CATEGORY ____ II (based on functions___ or special characteristics___) ✔
1. Category of wetland based on FUNCTIONS
_______Category I – Total score = 23 - 27
Score for each
_______✔ Category II – Total score = 20 - 22 function based
on three
_______Category III – Total score = 16 - 19 ratings
_______Category IV – Total score = 9 - 15 (order of ratings
is not
important)
FUNCTION Improving Hydrologic Habitat
Water Quality
9 = H,H,H
Circle the appropriate ratings
8 = H,H,M
Site Potential H M L H M L H M L 7 = H,H,L
Landscape Potential H M L H M L H M L 7 = H,M,M
Value H M L H M L H M L TOTAL 6 = H,M,L
6 = M,M,M
Score Based on
8 6 8 22 5 = H,L,L
Ratings
5 = M,M,L
4 = M,L,L
3 = L,L,L
2. Category based on SPECIAL CHARACTERISTICS of wetland
CHARACTERISTIC CATEGORY
Estuarine I II
Wetland of High Conservation Value I
Bog I
Mature Forest I
Old Growth Forest I
Coastal Lagoon I II
Interdunal I II III IV
None of the above ✔
Wetland Rating System for Western WA: 2014 Update 1
Rating Form – Effective January 1, 2015
Wetland name or number ______ C
Maps and figures required to answer questions correctly for
Western Washington
Depressional Wetlands
Map of: To answer questions: Figure #
Cowardin plant classes D 1.3, H 1.1, H 1.4 1
Hydroperiods D 1.4, H 1.2 1
Location of outlet (can be added to map of hydroperiods) D 1.1, D 4.1 1
Boundary of area within 150 ft of the wetland (can be added to another figure) D 2.2, D 5.2 1
Map of the contributing basin D 4.3, D 5.3 2
1 km Polygon: Area that extends 1 km from entire wetland edge - including H 2.1, H 2.2, H 2.3
2
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website) D 3.1, D 3.2 3
Screen capture of list of TMDLs for WRIA in which unit is found (from web) D 3.3 4
Riverine Wetlands
Map of: To answer questions: Figure #
Cowardin plant classes H 1.1, H 1.4
Hydroperiods H 1.2
Ponded depressions R 1.1
Boundary of area within 150 ft of the wetland (can be added to another figure) R 2.4
Plant cover of trees, shrubs, and herbaceous plants R 1.2, R 4.2
Width of unit vs. width of stream (can be added to another figure) R 4.1
Map of the contributing basin R 2.2, R 2.3, R 5.2
1 km Polygon: Area that extends 1 km from entire wetland edge - including H 2.1, H 2.2, H 2.3
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website) R 3.1
Screen capture of list of TMDLs for WRIA in which unit is found (from web) R 3.2, R 3.3
Lake Fringe Wetlands
Map of: To answer questions: Figure #
Cowardin plant classes L 1.1, L 4.1, H 1.1, H 1.4
Plant cover of trees, shrubs, and herbaceous plants L 1.2
Boundary of area within 150 ft of the wetland (can be added to another figure) L 2.2
1 km Polygon: Area that extends 1 km from entire wetland edge - including H 2.1, H 2.2, H 2.3
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website) L 3.1, L 3.2
Screen capture of list of TMDLs for WRIA in which unit is found (from web) L 3.3
Slope Wetlands
Map of: To answer questions: Figure #
Cowardin plant classes H 1.1, H 1.4
Hydroperiods H 1.2
Plant cover of dense trees, shrubs, and herbaceous plants S 1.3
Plant cover of dense, rigid trees, shrubs, and herbaceous plants S 4.1
(can be added to figure above)
Boundary of 150 ft buffer (can be added to another figure) S 2.1, S 5.1
1 km Polygon: Area that extends 1 km from entire wetland edge - including H 2.1, H 2.2, H 2.3
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website) S 3.1, S 3.2
Screen capture of list of TMDLs for WRIA in which unit is found (from web) S 3.3
Wetland Rating System for Western WA: 2014 Update 2
Rating Form – Effective January 1, 2015
Wetland name or number ______ C
HGM Classification of Wetlands in Western Washington
For questions 1-7, the criteria described must apply to the entire unit being rated.
If the hydrologic criteria listed in each question do not apply to the entire unit being rated, you
probably have a unit with multiple HGM classes. In this case, identify which hydrologic criteria in
questions 1-7 apply, and go to Question 8.
1. Are the water levels in the entire unit usually controlled by tides except during floods?
NO – go to 2 YES – the wetland class is Tidal Fringe – go to 1.1
1.1 Is the salinity of the water during periods of annual low flow below 0.5 ppt (parts per thousand)?
NO – Saltwater Tidal Fringe (Estuarine) YES – Freshwater Tidal Fringe
If your wetland can be classified as a Freshwater Tidal Fringe use the forms for Riverine wetlands. If it
is Saltwater Tidal Fringe it is an Estuarine wetland and is not scored. This method cannot be used to
score functions for estuarine wetlands.
2. The entire wetland unit is flat and precipitation is the only source (>90%) of water to it. Groundwater
and surface water runoff are NOT sources of water to the unit.
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 entire wetland unit meet all of the following criteria?
___The vegetated part of the wetland is on the shores of a body of permanent open water (without any
plants on the surface at any time of the year) at least 20 ac (8 ha) in size;
___At least 30% of the open water area is deeper than 6.6 ft (2 m).
NO – go to 4 YES – The wetland class is Lake Fringe (Lacustrine Fringe)
4. Does the entire wetland unit meet all of the following criteria?
____The wetland is on a slope (slope can be very gradual),
____The water flows through the wetland in one direction (unidirectional) and usually comes from
seeps. It may flow subsurface, as sheetflow, or in a swale without distinct banks,
____The water leaves the wetland without being impounded.
NO – go to 5 YES – The wetland class is Slope
NOTE: Surface water does not pond in these type of wetlands except occasionally in very small and
shallow depressions or behind hummocks (depressions are usually <3 ft diameter and less than 1 ft
deep).
5. Does the entire wetland unit meet all of the following criteria?
____The unit is in a valley, or stream channel, where it gets inundated by overbank flooding from that
stream or river,
____The overbank flooding occurs at least once every 2 years.
Wetland Rating System for Western WA: 2014 Update 3
Rating Form – Effective January 1, 2015
Wetland name or number ______ C
NO – go to 6 YES – The wetland class is Riverine
NOTE: The Riverine unit can contain depressions that are filled with water when the river is not
flooding
6. Is the entire wetland unit in a topographic depression in which water ponds, or is saturated to the
surface, at some time during the year? This means that any outlet, if present, is higher than the interior
of the wetland.
NO – go to 7 YES – The wetland class is Depressional
7. Is the entire wetland unit located in a very flat area with no obvious depression and no overbank
flooding? The unit does not pond surface water more than a few inches. The unit seems to be
maintained by high groundwater in the area. The wetland may be ditched, but has no obvious natural
outlet.
NO – go to 8 YES – The wetland class is Depressional
8. Your wetland unit seems to be difficult to classify and probably contains several different HGM
classes. For example, seeps at the base of a slope may grade into a riverine floodplain, or a small
stream within a Depressional wetland has a zone of flooding along its sides. GO BACK AND IDENTIFY
WHICH OF THE HYDROLOGIC REGIMES DESCRIBED IN QUESTIONS 1-7 APPLY TO DIFFERENT
AREAS IN THE UNIT (make a rough sketch to help you decide). Use the following table to identify the
appropriate class to use for the rating system if you have several HGM classes present within the
wetland unit being scored.
NOTE: Use this table only if the class that is recommended in the second column represents 10% or
more of the total area of the wetland unit being rated. If the area of the HGM class listed in column 2
is less than 10% of the unit; classify the wetland using the class that represents more than 90% of the
total area.
HGM classes within the wetland unit HGM class to
being rated use in rating
Slope + Riverine Riverine
Slope + Depressional Depressional
Slope + Lake Fringe Lake Fringe
Depressional + Riverine along stream Depressional
within boundary of depression
Depressional + Lake Fringe Depressional
Riverine + Lake Fringe Riverine
Salt Water Tidal Fringe and any other Treat as
class of freshwater wetland ESTUARINE
If you are still unable to determine which of the above criteria apply to your wetland, or if you have
more than 2 HGM classes within a wetland boundary, classify the wetland as Depressional for the
rating.
Wetland Rating System for Western WA: 2014 Update 4
Rating Form – Effective January 1, 2015
Wetland name or number ______ C
DEPRESSIONAL AND FLATS WETLANDS
Water Quality Functions - Indicators that the site functions to improve water quality
D 1.0. Does the site have the potential to improve water quality?
D 1.1. Characteristics of surface water outflows from the wetland:
Wetland is a depression or flat depression (QUESTION 7 on key) with no surface water leaving it (no outlet).
points = 3
Wetland has an intermittently flowing stream or ditch, OR highly constricted permanently flowing outlet. 1
points = 2
✔ Wetland has an unconstricted, or slightly constricted, surface outlet that is permanently flowing points = 1
Wetland is a flat depression (QUESTION 7 on key), whose outlet is a permanently flowing ditch. points = 1
D 1.2. The soil 2 in below the surface (or duff layer) is true clay or true organic (use NRCS definitions).Yes = 4 No = 0 0
D 1.3. Characteristics and distribution of persistent plants (Emergent, Scrub-shrub, and/or Forested Cowardin classes):
Wetland has persistent, ungrazed, plants > 95% of area points = 5
✔ Wetland has persistent, ungrazed, plants > ½ of area points = 3 3
Wetland has persistent, ungrazed plants > 1/ of area points = 1
10
Wetland has persistent, ungrazed plants <1/ of area points = 0
10
D 1.4. Characteristics of seasonal ponding or inundation:
This is the area that is ponded for at least 2 months. See description in manual.
Area seasonally ponded is > ½ total area of wetland points = 4 2
✔ Area seasonally ponded is > ¼ total area of wetland points = 2
Area seasonally ponded is < ¼ total area of wetland points = 0
Total for D 1 Add the points in the boxes above 6
Rating of Site Potential If score is: 12-16 = H ✔ 6-11 = M 0-5 = L Record the rating on the first page
D 2.0. Does the landscape have the potential to support the water quality function of the site?
D 2.1. Does the wetland unit receive stormwater discharges? Yes = 1 No = 0 1
D 2.2. Is > 10% of the area within 150 ft of the wetland in land uses that generate pollutants? Yes = 1 No = 0 1
D 2.3. Are there septic systems within 250 ft of the wetland? Yes = 1 No = 0 1
D 2.4. Are there other sources of pollutants coming into the wetland that are not listed in questions D 2.1-D 2.3?
0
Source_______________ Yes = 1 No = 0
Total for D 2 Add the points in the boxes above 3
Rating of Landscape Potential If score is: ✔ 3 or 4 = H 1 or 2 = M 0 = L Record the rating on the first page
D 3.0. Is the water quality improvement provided by the site valuable to society?
D 3.1. Does the wetland discharge directly (i.e., within 1 mi) to a stream, river, lake, or marine water that is on the
303(d) list? Yes = 1 No = 0 0
D 3.2. Is the wetland in a basin or sub-basin where an aquatic resource is on the 303(d) list? Yes = 1 No = 0 1
D 3.3. Has the site been identified in a watershed or local plan as important for maintaining water quality (answer YES
2
if there is a TMDL for the basin in which the unit is found)? Yes = 2 No = 0
Total for D 3 Add the points in the boxes above 3
Rating of Value If score is: ✔ 2-4 = H 1 = M 0 = L Record the rating on the first page
Wetland Rating System for Western WA: 2014 Update 5
Rating Form – Effective January 1, 2015
Wetland name or number ______ C
DEPRESSIONAL AND FLATS WETLANDS
Hydrologic Functions - Indicators that the site functions to reduce flooding and stream degradation
D 4.0. Does the site have the potential to reduce flooding and erosion?
D 4.1. Characteristics of surface water outflows from the wetland:
Wetland is a depression or flat depression with no surface water leaving it (no outlet) points = 4
Wetland has an intermittently flowing stream or ditch, OR highly constricted permanently flowing outletpoints = 2 0
Wetland is a flat depression (QUESTION 7 on key), whose outlet is a permanently flowing ditch points = 1
✔ Wetland has an unconstricted, or slightly constricted, surface outlet that is permanently flowing points = 0
D 4.2. Depth of storage during wet periods: Estimate the height of ponding above the bottom of the outlet. For wetlands
with no outlet, measure from the surface of permanent water or if dry, the deepest part.
Marks of ponding are 3 ft or more above the surface or bottom of outlet points = 7
✔ Marks of ponding between 2 ft to < 3 ft from surface or bottom of outlet points = 5 5
Marks are at least 0.5 ft to < 2 ft from surface or bottom of outlet points = 3
The wetland is a “headwater†wetland points = 3
Wetland is flat but has small depressions on the surface that trap water points = 1
Marks of ponding less than 0.5 ft (6 in) points = 0
D 4.3. Contribution of the wetland to storage in the watershed: Estimate the ratio of the area of upstream basin
contributing surface water to the wetland to the area of the wetland unit itself.
The area of the basin is less than 10 times the area of the unit points = 5
0
The area of the basin is 10 to 100 times the area of the unit points = 3
✔ The area of the basin is more than 100 times the area of the unit points = 0
Entire wetland is in the Flats class points = 5
Total for D 4 Add the points in the boxes above 5
Rating of Site Potential If score is: 12-16 = H 6-11 = M ✔ 0-5 = L Record the rating on the first page
D 5.0. Does the landscape have the potential to support hydrologic functions of the site?
D 5.1. Does the wetland receive stormwater discharges? Yes = 1 No = 0 1
D 5.2. Is >10% of the area within 150 ft of the wetland in land uses that generate excess runoff? Yes = 1 No = 0 1
D 5.3. Is more than 25% of the contributing basin of the wetland covered with intensive human land uses (residential at 0
>1 residence/ac, urban, commercial, agriculture, etc.)? Yes = 1 No = 0
Total for D 5 Add the points in the boxes above 2
Rating of Landscape Potential If score is: 3 = H ✔ 1 or 2 = M 0 = L Record the rating on the first page
D 6.0. Are the hydrologic functions provided by the site valuable to society?
D 6.1. The unit is in a landscape that has flooding problems. Choose the description that best matches conditions around
the wetland unit being rated. Do not add points. Choose the highest score if more than one condition is met.
The wetland captures surface water that would otherwise flow down-gradient into areas where flooding has
damaged human or natural resources (e.g., houses or salmon redds):
✔  Flooding occurs in a sub-basin that is immediately down-gradient of unit. points = 2
ï‚· Surface flooding problems are in a sub-basin farther down-gradient. points = 1 2
Flooding from groundwater is an issue in the sub-basin. points = 1
The existing or potential outflow from the wetland is so constrained by human or natural conditions that the
water stored by the wetland cannot reach areas that flood. Explain why _____________ points = 0
There are no problems with flooding downstream of the wetland. points = 0
D 6.2. Has the site been identified as important for flood storage or flood conveyance in a regional flood control plan?
0
Yes = 2 No = 0
Total for D 6 Add the points in the boxes above 2
Rating of Value If score is: ✔ 2-4 = H 1 = M 0 = L Record the rating on the first page
Wetland Rating System for Western WA: 2014 Update 6
Rating Form – Effective January 1, 2015
Wetland name or number ______ C
These questions apply to wetlands of all HGM classes.
HABITAT FUNCTIONS - Indicators that site functions to provide important habitat
H 1.0. Does the site have the potential to provide habitat?
H 1.1. Structure of plant community: Indicators are Cowardin classes and strata within the Forested class. Check the
Cowardin plant classes in the wetland. Up to 10 patches may be combined for each class to meet the threshold
of ¼ ac or more than 10% of the unit if it is smaller than 2.5 ac. Add the number of structures checked.
____Aquatic bed 4 structures or more: points = 4
____Emergent 3 structures: points = 2 2
____✔ Scrub-shrub (areas where shrubs have > 30% cover) 2 structures: points = 1
____Forested (areas where trees have >✔ 30% cover) 1 structure: points = 0
If the unit has a Forested class, check if:
___✔ _The Forested class has 3 out of 5 strata (canopy, sub-canopy, shrubs, herbaceous, moss/ground-cover)
that each cover 20% within the Forested polygon
H 1.2. Hydroperiods
Check the types of water regimes (hydroperiods) present within the wetland. The water regime has to cover
more than 10% of the wetland or ¼ ac to count (see text for descriptions of hydroperiods).
____Permanently flooded or inundated✔ 4 or more types present: points = 3
____Seasonally flooded or inundated✔ 3 types present: points = 2
____Occasionally flooded or inundated 2 types present: points = 1 3
____Saturated only✔ 1 type present: points = 0
____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
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 and you do not have to name
the species. Do not include Eurasian milfoil, reed canarygrass, purple loosestrife, Canadian thistle 2
If you counted: > 19 species points = 2
5 - 19 species points = 1
< 5 species points = 0
H 1.4. Interspersion of habitats
Decide from the diagrams below whether interspersion among Cowardin plants classes (described in H 1.1), or
the classes and unvegetated areas (can include open water or mudflats) is high, moderate, low, or none. If you
have four or more plant classes or three classes and open water, the rating is always high.
3
None = 0 points Low = 1 point Moderate = 2 points
All three diagrams
in this row
are HIGH = 3points
Wetland Rating System for Western WA: 2014 Update 13
Rating Form – Effective January 1, 2015
Wetland name or number ______ C
H 1.5. Special habitat features:
Check the habitat features that are present in the wetland. The number of checks is the number of points.
____Large, downed, woody debris within the ✔ wetland (> 4 in diameter and 6 ft long).
____Standing snags (✔ dbh > 4 in) within the wetland
____Undercut banks are present for at least 6.6 ft (2✔ m) and/or overhanging plants extends at least 3.3 ft (1 m)
over a stream (or ditch) in, or contiguous with the wetland, for at least 33 ft (10 m)
____Stable steep banks of fine material that might be used by beaver or muskrat for denning (> 30 degree 3
slope) OR signs of recent beaver activity are present (cut shrubs or trees that have not yet weathered
where wood is exposed)
____At least ¼ ac of thin-stemmed persistent plants or woody branches are present in areas that are
permanently or seasonally inundated (structures for egg-laying by amphibians)
____Invasive plants cover less than 25% of the wetland area in every stratum of plants (see H 1.1 for list of
strata)
Total for H 1 Add the points in the boxes above 13
Rating of Site Potential If score is: 15-18 = H ✔ 7-14 = M 0-6 = L Record the rating on the first page
H 2.0. Does the landscape have the potential to support the habitat functions of the site?
H 2.1. Accessible habitat (include only habitat that directly abuts wetland unit).
Calculate: % undisturbed habitat 12 + [(% moderate and low intensity land uses)/2] 8 = _______20 %
If total accessible habitat is:
> 1/ (33.3%) of 1 km Polygon points = 3 2
3
✔ 20-33% of 1 km Polygon points = 2
10-19% of 1 km Polygon points = 1
< 10% of 1 km Polygon points = 0
H 2.2. Undisturbed habitat in 1 km Polygon around the wetland.
Calculate: % undisturbed habitat 29 + [(% moderate and low intensity land uses)/2] 14 = _______%43
Undisturbed habitat > 50% of Polygon points = 3
✔ Undisturbed habitat 10-50% and in 1-3 patches points = 2 2
Undisturbed habitat 10-50% and > 3 patches points = 1
Undisturbed habitat < 10% of 1 km Polygon points = 0
H 2.3. Land use intensity in 1 km Polygon: If
> 50% of 1 km Polygon is high intensity land use points = (- 2) 0
✔ ≤ 50% of 1 km Polygon is high intensity points = 0
Total for H 2 Add the points in the boxes above 4
Rating of Landscape Potential If score is: ✔ 4-6 = H 1-3 = M < 1 = L Record the rating on the first page
H 3.0. Is the habitat provided by the site valuable to society?
H 3.1. Does the site provide habitat for species valued in laws, regulations, or policies? Choose only the highest score
that applies to the wetland being rated.
Site meets ANY of the following criteria: points = 2
✔ It has 3 or more priority habitats within 100 m (see next page)
 It provides habitat for Threatened or Endangered species (any plant or animal on the state or federal lists)
 It is mapped as a location for an individual WDFW priority species 2
 It is a Wetland of High Conservation Value as determined by the Department of Natural Resources
 It has been categorized as an important habitat site in a local or regional comprehensive plan, in a
Shoreline Master Plan, or in a watershed plan
Site has 1 or 2 priority habitats (listed on next page) within 100 m points = 1
Site does not meet any of the criteria above points = 0
Rating of Value If score is: ✔ 2 = H 1 = M 0 = L Record the rating on the first page
Wetland Rating System for Western WA: 2014 Update 14
Rating Form – Effective January 1, 2015
Wetland name or number ______ C
WDFW Priority Habitats
Priority habitats listed by WDFW (see complete descriptions of WDFW priority habitats, and the counties in which they can
be found, in: Washington Department of Fish and Wildlife. 2008. Priority Habitat and Species List. Olympia, Washington.
177 pp. http://wdfw.wa.gov/publications/00165/wdfw00165.pdf or access the list from here:
http://wdfw.wa.gov/conservation/phs/list/)
Count how many of the following priority habitats are within 330 ft (100 m) of the wetland unit: NOTE: This question is
independent of the land use between the wetland unit and the priority habitat.
 Aspen Stands: Pure or mixed stands of aspen greater than 1 ac (0.4 ha).
✔ Biodiversity Areas and Corridors: Areas of habitat that are relatively important to various species of native fish and
wildlife (full descriptions in WDFW PHS report).
 Herbaceous Balds: Variable size patches of grass and forbs on shallow soils over bedrock.
 Old-growth/Mature 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 8 trees/ac (20 trees/ha ) > 32 in (81 cm) dbh or > 200
years of age. Mature forests – Stands with average diameters exceeding 21 in (53 cm) 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.
 Oregon White Oak: Woodland stands of pure oak or oak/conifer associations where canopy coverage of the oak
component is important (full descriptions in WDFW PHS report p. 158 – see web link above).
✔ Riparian: The area adjacent to aquatic systems with flowing water that contains elements of both aquatic and
terrestrial ecosystems which mutually influence each other.
 Westside Prairies: Herbaceous, non-forested plant communities that can either take the form of a dry prairie or a wet
prairie (full descriptions in WDFW PHS report p. 161 – see web link above).
✔ Instream: The combination of physical, biological, and chemical processes and conditions that interact to provide
functional life history requirements for instream fish and wildlife resources.
 Nearshore: Relatively undisturbed nearshore habitats. These include Coastal Nearshore, Open Coast Nearshore, and
Puget Sound Nearshore. (full descriptions of habitats and the definition of relatively undisturbed are in WDFW report –
see web link on previous page).
 Caves: A naturally occurring cavity, recess, void, or system of interconnected passages under the earth in soils, rock,
ice, or other geological formations and is large enough to contain a human.
 Cliffs: Greater than 25 ft (7.6 m) high and occurring below 5000 ft elevation.
 Talus: Homogenous areas of rock rubble ranging in average size 0.5 - 6.5 ft (0.15 - 2.0 m), composed of basalt, andesite,
and/or sedimentary rock, including riprap slides and mine tailings. May be associated with cliffs.
✔ Snags and Logs: Trees are considered snags if they are dead or dying and exhibit sufficient decay characteristics to
enable cavity excavation/use by wildlife. Priority snags have a diameter at breast height of > 20 in (51 cm) in western
Washington and are > 6.5 ft (2 m) in height. Priority logs are > 12 in (30 cm) in diameter at the largest end, and > 20 ft
(6 m) long.
Note: All vegetated wetlands are by definition a priority habitat but are not included in this list because they are addressed
elsewhere.
Wetland Rating System for Western WA: 2014 Update 15
Rating Form – Effective January 1, 2015
Wetland name or number ______ C
CATEGORIZATION BASED ON SPECIAL CHARACTERISTICS
Wetland Type Category
Check off any criteria that apply to the wetland. Circle the category when the appropriate criteria are met.
SC 1.0. Estuarine wetlands
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= Not an estuarine wetland
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 I No - Go to SC 1.2
SC 1.2. Is the wetland unit at least 1 ac in size and meets at least two of the following three conditions?
 The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation, grazing, and has less
Cat. I
than 10% cover of non-native plant species. (If non-native species are Spartina, see page 25)
 At least ¾ of the landward edge of the wetland has a 100 ft buffer of shrub, forest, or un-grazed or un-
mowed grassland.
Cat. II
 The wetland has at least two of the following features: tidal channels, depressions with open water, or
contiguous freshwater wetlands. Yes = Category I No = Category II
SC 2.0. Wetlands of High Conservation Value (WHCV)
SC 2.1. Has the WA Department of Natural Resources updated their website to include the list of Wetlands of High
Conservation Value? Yes – Go to SC 2.2 No – Go to SC 2.3 Cat. I
SC 2.2. Is the wetland listed on the WDNR database as a Wetland of High Conservation Value?
Yes = Category I No = Not a WHCV
SC 2.3. Is the wetland in a Section/Township/Range that contains a Natural Heritage wetland?
http://www1.dnr.wa.gov/nhp/refdesk/datasearch/wnhpwetlands.pdf
Yes – Contact WNHP/WDNR and go to SC 2.4 No = Not a WHCV
SC 2.4. Has WDNR identified the wetland within the S/T/R as a Wetland of High Conservation Value and listed it on
their website? Yes = Category I No = Not a WHCV
SC 3.0. Bogs
Does the wetland (or any part of the unit) meet both the criteria for soils and vegetation in bogs? Use the key
below. If you answer YES you will still need to rate the wetland based on its functions.
SC 3.1. Does an area within the wetland unit have organic soil horizons, either peats or mucks, that compose 16 in or
more of the first 32 in of the soil profile? Yes – Go to SC 3.3 No – Go to SC 3.2
SC 3.2. Does an area within the wetland unit have organic soils, either peats or mucks, that are less than 16 in deep
over bedrock, or an impermeable hardpan such as clay or volcanic ash, or that are floating on top of a lake or
pond? Yes – Go to SC 3.3 No = Is not a bog
SC 3.3. Does an area with peats or mucks have more than 70% cover of mosses at ground level, AND at least a 30%
cover of plant species listed in Table 4? Yes = Is a Category I bog No – Go to SC 3.4
NOTE: If you are uncertain about the extent of mosses in the understory, you may substitute that criterion by
measuring the pH of the water that seeps into a hole dug at least 16 in deep. If the pH is less than 5.0 and the
plant species in Table 4 are present, the wetland is a bog. Cat. I
SC 3.4. Is an area with peats or mucks forested (> 30% cover) with Sitka spruce, subalpine fir, western red cedar,
western hemlock, lodgepole pine, quaking aspen, Engelmann spruce, or western white pine, AND any of the
species (or combination of species) listed in Table 4 provide more than 30% of the cover under the canopy?
Yes = Is a Category I bog No = Is not a bog
Wetland Rating System for Western WA: 2014 Update 16
Rating Form – Effective January 1, 2015
Wetland name or number ______ C
SC 4.0. Forested Wetlands
Does the wetland have at least 1 contiguous acre of forest that meets one of these criteria for the WA
Department of Fish and Wildlife’s forests as priority habitats? If you answer YES you will still need to rate
the wetland based on its functions.
 Old-growth forests (west of Cascade crest): Stands of at least two tree species, forming a multi-layered
canopy with occasional small openings; with at least 8 trees/ac (20 trees/ha) that are at least 200 years of
age OR have a diameter at breast height (dbh) of 32 in (81 cm) or more.
 Mature forests (west of the Cascade Crest): Stands where the largest trees are 80- 200 years old OR the
species that make up the canopy have an average diameter (dbh) exceeding 21 in (53 cm).
Yes = Category I No = Not a forested wetland for this section Cat. I
SC 5.0. Wetlands in Coastal Lagoons
Does the wetland meet all of the following criteria of a wetland in a coastal lagoon?
 The wetland lies in a depression adjacent to marine waters that is wholly or partially separated from
marine waters by sandbanks, gravel banks, shingle, or, less frequently, rocks
 The lagoon in which the wetland is located contains ponded 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) Cat. I
Yes – Go to SC 5.1 No = 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 aggressive, opportunistic plant species (see list of species on p. 100). Cat. II
 At least ¾ of the landward edge of the wetland has a 100 ft buffer of shrub, forest, or un-grazed or un-
mowed grassland.
 The wetland is larger than 1/ ac (4350 ft2)
10
Yes = Category I No = Category II
SC 6.0. Interdunal Wetlands
Is the wetland west of the 1889 line (also called the Western Boundary of Upland Ownership or WBUO)? If
you answer yes you will still need to rate the wetland based on its habitat 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 Cat I
 Ocean Shores-Copalis: Lands west of SR 115 and SR 109
Yes – Go to SC 6.1 No = not an interdunal wetland for rating
SC 6.1. Is the wetland 1 ac or larger and scores an 8 or 9 for the habitat functions on the form (rates H,H,H or H,H,M Cat. II
for the three aspects of function)? Yes = Category I No – Go to SC 6.2
SC 6.2. Is the wetland 1 ac or larger, or is it in a mosaic of wetlands that is 1 ac or larger?
Yes = Category II No – Go to SC 6.3 Cat. III
SC 6.3. Is the unit between 0.1 and 1 ac, or is it in a mosaic of wetlands that is between 0.1 and 1 ac?
Yes = Category III No = Category IV
Cat. IV
Category of wetland based on Special Characteristics
N/A
If you answered No for all types, enter “Not Applicable†on Summary Form
Wetland Rating System for Western WA: 2014 Update 17
Rating Form – Effective January 1, 2015
Wetland name or number ______ C
This page left blank intentionally
Wetland Rating System for Western WA: 2014 Update 18
Rating Form – Effective January 1, 2015
PUD - EAST ARLINGTON-OSO 115KV REBUILD
WETLAND RATING FIGURE 1- WETLAND C
LEGEND
SCRUB-SHRUB
FORESTED VEGETATION
OPEN WATER
SATURATED ONLY Scale 1" = 200'
SEASONALLY FLOODED 0 100 200 300 400
PERMANENTLY FLOODED WETLAND RATING
Delineation / Mitigation / Restoration / Habitat Creation / Permit Assistance Wetland C
150' FROM WL BOUNDARY 9505Phone: 19th Avenue (425) 337-3174 S.E. Suite 106 Everett,Washington 98208 PUD No. 1 Snohomish
County
Fax: (425) 337-3045 Attn: Alex Chorey Figure C-1
PERENNIAL STREAM Email: mailbox@wetlandresources.com PO Box 1107 WRI Job # 17299
Everett, WA 98026 Rated by: JL
PUD - EAST ARLINGTON-OSO 115KV REBUILD
WETLAND RATING FIGURE 2- WETLAND C
LEGEND
RELATIVELY
UNDISTURBED
LOW/MOD.
INTENSITY
HIGH
INTENSITY CONTRIBUTING BASIN
Scale 1" = 1,000'
ACCESSIBLE AREA RELATIVE TO
HABITAT WETLAND UNIT IS 115:1 0 1,000 2,000
WETLAND
WETLAND RATING
1 KM FROM Delineation / Mitigation / Restoration / Habitat Creation / Permit Assistance Wetland C
WETLAND 9505 19th Avenue S.E. Suite 106 Everett,Washington 98208 PUD No. 1 Snohomish County
Phone: (425) 337-3174
CONTRIBUTING Fax: (425) 337-3045 Attn: Alex Chorey Figure C-2
Email: mailbox@wetlandresources.com PO Box 1107 WRI Job # 17299
BASIN
Everett, WA 98026 Rated by: JL
PUD - EAST ARLINGTON-OSO 115KV REBUILD
WETLAND RATING FIGURE 3- WETLAND C
SOUTH FORK STILLAGUAMISH
WETLAND DRAINS
DIRECTLY TO
EAGLE CREEK
Scale 1" = 2,000'
0 2,000 4,000
LEGEND
WETLAND
WETLAND RATING
AQUATIC RESOURCES Delineation / Mitigation / Restoration / Habitat Creation / Permit Assistance Wetland C
9505 19th Avenue S.E. Suite 106 Everett,Washington 98208
ON THE 303(d) LIST Phone: (425) 337-3174 PUD No. 1 Snohomish County
Fax: (425) 337-3045 Attn: Alex Chorey Figure C-3
Email: mailbox@wetlandresources.com PO Box 1107 WRI Job # 17299
Everett, WA 98026 Rated by: JL
PUD - EAST ARLINGTON-OSO 115KV REBUILD
WETLAND RATING FIGURE 4- WETLAND C
WETLAND RATING
Delineation / Mitigation / Restoration / Habitat Creation / Permit Assistance Wetland C
9505 19th Avenue S.E. Suite 106 Everett,Washington 98208
Phone: (425) 337-3174 PUD No. 1 Snohomish County
Fax: (425) 337-3045 Attn: Alex Chorey Figure C-4
Email: mailbox@wetlandresources.com PO Box 1107 WRI Job # 17299
Everett, WA 98026 Rated by: JL
APPENDIX B
CRITICAL AREAS MAP
SITE PLAN
APVD
PUD - EAST ARLINGTON TO OSO SUBSTATION 115kV REBUILD
CHKR
PTN. OF SECTION 12, TOWNSHIP 31N, RANGE 5E, W.M.
APPLICANT: SNOHOMISH COUNTY PUD NO.1
ATTN: ALEX CHOREY
PO BOX 1107 ENGR
CITY OF ARLINGTON, FILE NO.
EVERETT, WA 98206-1107
PH: (425)783-5115
VICINITY
MAP AMChorey@snopud.com
CONTACT: JOHN LAUFENBERG
S
.
F WETLAND RESOURCES
o
rk
S 9505 19TH AVE SE SUITE 106
t
i
l
l EVERETT WA 98208
a
g
u PH: (425)337-3174
a
m John@wetlandresources.com
i
s
h
R
i
v ENGINEER: SNOHOMISH COUNTY PUD NO.1
e
COUNTY
r
00849900000100 ARLINGTON
ATTN: ALEX CHOREY DESCRIPTION
SITE PO BOX 1107
EVERETT, WA 98206-1107
OF
PH: (425)783-5115
AMChorey@snopud.com
CITY
CESCL: RAY COGLAS
EARTH SOLUTIONS NW, LLC
1805 136TH PL NE, SUITE 201,
SNOHOMISH 225'
BELLEVUE, WA 98005
PH: (425)449-4704
WETLAND B 00849900000600
ray.coglas@earthsolutionsnw.com
BY
CATEGORY III 00830700000100
CONTRACTOR: TBD
HABITAT SCORE: 5
DATE
00830700000200
PROJECT AREA DETAILS
TAX PARCEL INDENTIFICATION FOR ALL PROPERTIES
105' STANDARD BUFFER
WITHIN PROJECT AREA No
REPLACE ONE (1) EXISTING WOOD POLE WITH ONE (1) IRON POLE.
REMOVE EXISTING WOOD POLE.
EASEMENT WITHIN: 00830700000200 APVDREVISIONS
PROPERY OWNER: BERTRAND, WILLIAM & TERRIE
00849900000200
- POLE LENGTH/DIAMETER/BURY DEPTH: 80FT/1.5FT/10FT
ADDRESS: 21313 87TH AVE NE, ARLINGTON, WA 98223
CHKR
- POLE MATERIAL: DUCTILE IRON
00849900000500
- REPLACED IMPERVIOUS SURFACE: 1.77 SQFT
- TEMPORARY IMPACT FROM CLEARING: 20 SQFT
LEGAL DESCRIPTION ENGR
00849900000400
- BACKFILL WILL BE COMPOSED OF 10 FT OF CRUSHED ROCK AND
LEGAL DESCRIPTIONS OF ALL PRIVATE EASEMENTS WILL BE
POLE TO BE
0.5 FT OF TOPSOIL.
FURNISHED TO THE CITY PRIOR TO PERMIT ISSUANCE.
00849900000300
REPLACED
PROJECT AREA LOCATION
SURVEY NOTES
PARCEL: EASEMENT WITHIN 00830700000200
- INDIVIDUAL POLES AND DISTURBANCE AREAS ARE NOT
ADDRESS: 21313 87TH AVE NE, ARLINGTON, WA 98223
SHOWN TO SCALE. POLE WILL BE 1.5 FEET IN DIAMETER
ZONING: RLMD
ROW W
AND ACTUAL DISTURBANCE AREA WILL NOT EXCEED 20
NRCS SOIL UNIT: NORMA LOAM
SQUARE FEET.
CRITICAL AREA/BUFFER IMPACTS: WITHIN WETLAND C BUFFER
105' 31051200200600
- CRITICAL AREA BOUNDARIES WITHIN THE EASEMENTS DESCRIPTION
NO IMPACTS TO CRITICAL AREAS WILL OCCUR. NO IN-WATER
00830700099800
AND PUBLIC RIGHT-OF-WAY ARE FIELD VERIFIED. ALL
WORK IS PROPOSED.
CRITICAL AREAS LOCATED OUTSIDE OF THE
NEW POLE
AFOREMENTIONED AREAS ARE ESTIMATED FROM THE
EDGE OF ROAD, AND USING PUBLICLY AVAILABLE
RESOURCES.
BY
POLE DETAIL
GRADING CALCULATIONS
PLAN VIEW
CROSS-SECTIONAL VIEW DATE
STREAM A
CUT FOR REPLACEMENT POLE No
80' NEW POLE
LIMIT OF GRADING
(CUT IS CALCULATED ON POLE HOLE SIZE)
EAGLE CREEK
DISTURBANCE
(HOLE AREA)
1.5' GROUND HOLE DIAMETER 2 FEET
NEW
EAST TYPE F
POLE
LINE HOLE DEPTH 10.5 FEET
HOLE VOLUME (CU. YD.) 1.22 CUBIC YARDS
DEPTH
ARLINGTON NE 150' BUFFER
WETLAND C
DEPTH
1.5'
POLE BACKFILL FILL FOR REPLACEMENT POLE 9505 19TH AVE SE, SUITE 106
SUBSTATION
CATEGORY II
10' BACKFILL HOLE (CALCULATED ON HOLE VOLUME MINUS POLE VOLUME) EVERETT, WA 98208
.5' TEL: 425.337.3174
AVE
10 FAX: 425.337.3045
HABITAT SCORE: 8 2'
BACKFILL HOLE VOLUME (ABOVE) 1.22 CUBIC YARDS
0.5'
POLE DIAMETER 1.5 FEET (AVG.)
225' STANDARD BUFFER
2'
87TH
NOT TO SCALE
NOT TO SCALE POLE DEPTH 10 FEET SNOHOMISH COUNTY
POLE VOLUME 0.66 CUBIC YARDS
LAND DISTURBANCE CALCULATIONS
FILL FOR NEW POLE 0.56 CUBIC YARDS
LAND DISTURBANCE PER REPLACEMENT
POLE PUBLIC UTILITY DISTRICT NO 1
31051200200500
CLEARING LIMITS DIAMETER
5 FT FILL FOR EXISTING POLE REMOVAL WO #100009145
CLEARING LIMITS AREA
20 SQ FT (CALCULATED ON POLE VOLUME TO BE REMOVED)
TVEIT ROAD
TASK
AREA POLE DIAMETER 1.5 FEET (AVG.)
SNOHOMISH COUNTY
QUANTITY (SQ FT) POLE DEPTH 10 FEET SCALE 1"=50'
POLE VOLUME 0.66 CUBIC YARDS
CITY OF ARLINGTON REPLACEMENT POLES
1 20 DFTR ED
EAGLE CREEK
FILL FOR REMOVED POLE 0.66 CUBIC YARDS
SUBSTATION
WETLAND A TOTAL LAND DISTURBANCE/CLEARING
(SQFT) 20 CHKR JL
TOTAL GRADING VOLUME FOR PROJECT
IMPERVIOUS SURFACE
CALCULATIONS ENGR
CATEGORY II
CUT
TOTAL CUT
IMPERVIOUS SURFACE PER
REPLACEMENT POLE APVD
HABITAT SCORE: 7
QUANTITY (CU. YDS.)
POLE DIAMETER
1.5 FT
REPLACEMENT POLE CUT 1 1.22
165' STANDARD BUFFER POLE AREA
1.77 SQFT DATE 06/27/2018
NORTH
IMPERVIOUS SURFACE PER
EXISTING POLE (T.B.R.) TOTAL CUT 1 PUD NO.1 OF
SNOHOMISH CO.
POLE DIAMETER
1.5 FT
LEGEND
22" x 34" PRINT
POLE AREA
1.77 SQFT FILL EAST ARLINGTON
Scale 1" = 50'
TOTAL FILL
WETLAND CITY/COUNTY BOUNDARY ROW
TO
QUANTITY (CU. YDS.) OSO SUBSTATION
0 50 100
NEW IMPERVIOUS SURFACES
FOR PROJECT: REPLACEMENT POLE FILL 1 0.56 115kV REBUILD
STREAM OHWM PARCELS POLE TO BE REPLACED
11" x 17" PRINT
QUANTITY AREA (SQ FT) REMOVED POLE FILL 1 0.66
REPLACEMENT POLES
1 1.77
STANDARD BUFFER 5' CONTOURS NEW POLE
Scale 1" = 100'
SITE PLAN
REMOVED POLES
1 -1.77 TOTAL FILL 1
W
0 50 100
STEEP SLOPES >33% EX. IMPERVIOUS SURFACE STRAW WATTLE
TOTAL NET IMPERVIOUS SURFACE
0 REV DRAWING
0 SHT 1/2
STORMWATER POLLUTION
PREVENTION PLAN (SWPPP)
APVD
PUD - EAST ARLINGTON TO
OSO SUBSTATION 115kV REBUILD
CHKR
PTN. OF SECTION
12, TOWNSHIP 31N, RANGE 5E, W.M.
ENGR
CITY OF ARLINGTON, FILE NO.
SWPPP 13 MINIMUM ELEMENTS 8: Stabilize Channels and Outlets
WIRE MESH OR ORANGE STANDARD DEPT. OF ECOLOGY
BARRIER SUPPORT FENCE
Proposed BMPs: No new channels or outlets are proposed for this site.
FOR SILT FILM FABRICS 6"
1: Mark Clearing Limits
SILT/FILTER FABRIC FENCE DETAIL
Marking clearing limits is an important step in limiting areas of clearing and thereby 9: Control Pollutants
NOT TO SCALE
reducing the opportunity for erosion and sedimentation. The clearing areas for this Proposed BMPs: No outside chemicals are expected to be necessary for the
FILTER FABRIC MATERIAL
project are limited to very small areas at each pole site. While it is important to
construction of this project. No concrete is proposed. All vehicles working
on and
DESCRIPTION
minimize clearing to the greatest extent feasible, marking clearing limits for this project around the site need to meet the State requirements for emissions. A drip
pan or other FILTER FABRIC FENCE INSTALLATION NOTES
is not necessary. Straw wattles will delineate clearing limits at pole sites that are in or appropriate temporary containment device shall be placed at locations where
leaks or 2'-0"
near buffers, floodplain, or shoreline-designated area. spills may occur during the fueling or maintenance of machinery.
1. THE FILTER FABRIC SHALL BE PURCHASED IN A CONTINUOUS
ROLL CUT TO THE LENGTH OF
THE BARRIER TO AVOID USE OF JOINTS. WHEN JOINTS ARE
NECESSARY, FILTER CLOTH
5'-0" SHALL BE SPLICED TOGETHER ONLY AT A SUPPORT POST, WITH
A MINIMUM 6-INCH OVERLAP,
Proposed BMPs: All work areas are single pole structures. Straw wattles will be placed
10: Control Dewatering
AND BOTH ENDS SECURELY FASTENED TO THE POST.
around poles to be removed and proposed poles where they are within or near buffers, Proposed BMPs: Dewatering is not expected for this project.
PROVIDE WASHED 0.75"-1.5" GRAVEL BACKFILL
floodplain, or shoreline-designated area. Existing vegetation will be preserved
12" 2. THE FILTER FABRIC FENCE SHALL BE INSTALLED TO FOLLOW
THE CONTOURS (WHERE
throughout the remainder of the project area. 11: Maintain BMPs
FEASIBLE). THE FENCE POSTS SHALL BE SPACED A MAXIMUM
OF 6 FEET APART AND DRIVEN
BURY BOTTOM OF FILTER 8" MIN. SECURELY INTO THE GROUND (MINIMUM OF 30 INCHES).
Proposed BMPs: The construction supervisor will be responsible for maintaining
all
BY
2: Establish Construction Access
MATERIAL IN 8"x12" TRENCH
BMPs during construction and working with the County to relocate or add
BMPs, as 3. A TRENCH SHALL BE EXCAVATED, ROUGHLY 8 INCHES WIDE AND
12 INCHES DEEP, UPSLOPE
SWPPP guidance calls for a construction entrance to be installed as the second step necessary, as site conditions change.
2"x2" WOOD POSTS, STANDARD AND ADJACENT TO THE WOOD POST TO ALLOW THE FILTER FABRIC
TO BE BURIED. DATE
after identifying clearing limits.
OR BETTER, OR EQUIVALENT
4. WHEN STANDARD STRENGTH FILTER FABRIC IS USED, A WIRE
MESH SUPPORT FENCE SHALL
Proposed BMPs: This project does not propose the installation of a construction 12: Manage the Project
SECTION BE FASTENED SECURELY TO THE UPSLOPE SIDE OF THE POSTS
USING HEAVY DUTY WIRE No
Proposed BMPs: It will be the responsibility of the contractor to manage
this project STAPLES AT LEAST 1 INCH LONG, TIE WIRES OR HOG RINGS.
THE WIRE SHALL EXTEND INTO
entrance as pole installation and removal will occur from existing rights-of way, utility and coordinate with the Engineer.
THE TRENCH A MINIMUM OF 4 INCHES AND SHALL NOT EXTEND
MORE THAN 36 INCHES APVDREVISIONS
easements, and roadways.
ABOVE THE ORIGINAL GROUND SURFACE.
FILTER FABRIC MATERIAL IN CONTINUOUS
13: Protect On-Site Stormwater Management BMPs for Runoff from Roofs and
ROLLS; USE STAPLES OR WIRE RINGS
CHKR
5. THE STANDARD STRENGTH FILTER FABRIC SHALL BE STAPLED
OR WIRED TO THE FENCE, AND
3: Control Flow Rates Other Hard Surfaces
TO ATTATCH FABRIC TO WIRE FENCE 20 INCHES OF THE FABRIC SHALL BE EXTENDED INTO THE
TRENCH. THE FABRIC SHALL NOT
This project will retain existing vegetation throughout. Proposed BMPs: It will be the responsibility of the contractor to manage
this project EXTEND MORE THAN 36 INCHES ABOVE THE ORIGINAL GROUND
SURFACE. FILTER FABRIC ENGR
WIRE MESH SUPPORT FENCE
and coordinate with the Engineer.
FOR SILT FILM FABRICS SHALL NOT BE STAPLED TO EXISTING TREES.
Proposed BMPs: This project is below the thresholds for requiring flow control.
6. WHEN EXTRA STRENGTH FILTER FABRIC AND CLOSE POST SPACING
ARE USED, THE WIRE
Inspection and Monitoring:
MESH SUPPORT FENCE MAY BE ELIMINATED. IN SUCH A CASE,
THE FILTER FABRIC IS
4: Install Sediment Controls Site inspections shall be done by a person who is knowledgeable in the
principles and STAPLED OR WIRED DIRECTLY TO THE POSTS WITH ALL OTHER
PROVISIONS OF STANDARD
Proposed BMPs: Straw wattles will be used around all pole installation and removal practices of erosion and sediment control. The person must have skills
to first assess NOTE 5 APPLYING.
sites that are within or near buffers, floodplain, or shoreline-designated area, as shown the site conditions and construction activities that could impact the quality
of
on the attached maps. Existing vegetation will be retained throughout the project. stormwater, and second assess the effectiveness of erosion and sediment
control 7. THE TRENCH SHALL BE BACKFILLED WITH 3/4-INCH MINIMUM
DIAMETER WASHED GRAVEL
OR COMPACTED NATIVE SOIL, AS DIRECTED BY ECOLOGIST.
measures used to control the quality of stormwater discharges.
Sediment controls are important throughout this project to prevent siltation, however,
2'-0" 8. FILTER FABRIC FENCES SHALL BE REMOVED WHEN THEY HAVE
SERVED THEIR USEFUL
extra caution should be taken around all pole locations that are within critical areas or Whenever inspection and/or monitoring reveals that the BMPs identified
in the SWPPP PURPOSE, BUT NOT BEFORE THE UPSLOPE AREA HAS BEEN PERMANENTLY
STABILIZED. DESCRIPTION
buffers, indicated by the requirement for straw wattle installation. are inadequate, due to the actual discharge of or potential to discharge
a significant 9. FILTER FABRIC FENCES SHALL BE INSPECTED IMMEDIATELY AFTER
EACH RAINFALL AND AT
amount of any pollutant, appropriate BMPs or design changes shall be implemented
as LEAST DAILY DURING PROLONGED RAINFALL. ANY REQUIRED REPAIRS
SHALL BE MADE
5: Stabilize Soils soon as possible.
IMMEDIATELY.
Proposed BMPs: Exposed soils will be limited to small areas around each pole site. All
5'-0"
BURY BOTTOM OF FILTER
exposed soils will be stabilized through grass seeding and covering with straw mulch. Maintaining an Updated Construction SWPPP:
MATERIAL IN 8"x12" TRENCH
Stockpiled soil from each pole site will either be removed on a daily basis or stabilized The SWPPP shall be retained on-site or within reasonable access to the
site.
with mulch, plastic sheeting, hydroseeding or other applicable BMP depending upon
BY
weather conditions. The SWPPP shall be modified whenever there is a change in the design, construction,
6' MAX 2'-6"
operation, or maintenance at the construction site that has, or could have,
a significant
DATE
6: Protect Slopes effect on the discharge of pollutants to waters of the state.
Proposed BMPs: No slope disturbance is proposed. If any occurs, all disturbed slopes
No
are required to be protected with mulch or other means. No concentrated runoff or The SWPPP shall be modified if, during inspections or investigations conducted
by the 2"x2" WOOD POSTS, STANDARD
significant amounts of sheet flow will be directed to new cut or fill slopes during owner/operator, or the applicable local or state regulatory authority,
it is determined that OR BETTER, OR EQUIVALENT ELEVATION
construction. the SWPPP is ineffective in eliminating or significantly minimizing pollutants
in
stormwater discharges from the site. The SWPPP shall be modified as necessary
to
7: Protect Drain Inlets and Catch Basins include additional or modified BMPs designed to correct problems identified.
Revisions
Proposed BMPs: No drain inlet/catch basin protection is necessary for this project due
to the SWPPP, if necessary, shall be completed within seven days following
inspection. STRAW WATTLE DETAIL (TYPICAL)
9505 19TH AVE SE, SUITE 106
to the small sizes of impact areas and lack of stormwater infrastructure within each work
EVERETT, WA 98208
TEL: 425.337.3174
area.
(FOR POLES PLACED IN BUFFER)
FAX: 425.337.3045
SNOHOMISH COUNTY
RESTORATION GRASS SEED MIX
The following grass seed mixture shall be used to restore all pole sites
PUBLIC UTILITY DISTRICT NO 1
located in buffer or critical areas. Straw mulch shall be applied as
POLE TO BE REMOVED
WO #100009145
necessary after grass seeding.
TASK
GRASS SEED MIX
Common Name Latin Name lbs/1,000 SF
POLE TO BE INSTALLED
SCALE NTS
Tall fescue Festuca arundinacea 0.4
DFTR ED
Colonial bentgrass Agrostis tenuis 0.4
Annual ryegrass Lolium perenne 0.5
CHKR JL
White clover Trifolium repens 0.2
CLEARING & DISTURBANCE AREA
INSIDE WATTLE
ENGR
APVD
DATE 06/27/2018
PUD NO.1 OF
SNOHOMISH CO.
STRAW WATTLE
EAST ARLINGTON
TO
OSO SUBSTATION
115kV REBUILD
SWPPP
REV DRAWING
0 SHT 2/2