20140299 Altmann Oliver Assoc 12132014 i
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Altmann C�liver Associat�es, LL�
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December 13, 2014
AOA-4741
Pedro DeGuzman
Terraforma Design Group, Inc.
5027 51St Ave. SW
Seattle, WA 98136
SUBJECT: Wetland and Stream Delineation for Tractor Supply Company
16533 Bald Hill Road SE, Yelm, WA
Dear Pedro:
1.0 INTRODUCTION
This report is the result of a wetland and stream study on a 7.82-acre site located in
the City of Yelm, Washington. The purpose of the report is to describe and classify
the wetland and stream delineated on the property. As part of the current project,
the site would be re-developed with a new Tractor Supply Company facility.
2.0 GENERAL PROPERTY DESCRIPTION AND LAND USE
The site consists of Tax Parcels 64303200700 & 64303200704 located at 16533
Bald Hill Road SE in the City of Yelm, Washington. It is found within the SW '/4 of
the NW '/4 of Section 29, Township 17 North, Range 2 East, W.M.
The western and central portions of the site are currently developed with Del's Farm
and Feed, which contains a retail building, a storage building, and associated
parking. The eastern portion of the site is undeveloped and consists primarily of a
periodically mowed pasture that slopes down from west to east. Yelm Creek flows
from south to north near the eastern property line.
3.0 METHODOLOGY
On October 27, 2014 a wetland reconnaissance and delineation was conducted on
the subject property utilizing the methodology outlined in the May 2010 Regional
Supplement to the Corps of Engineers Wetland Delineation Manual: Western
Mounfains, Valleys, and Coast Region (Version 2.0). In addition, the ordinary high
water(OHW) of the west side of Yelm Creek was also delineated. �-�
;
DEC 19 2014
�r.
:r�:
Pedro DeGuzman
December 13, 2014
Page 2
4.0 RESULTS
Yelm Creek flows from south to north through the far eastern portion of the property.
One wetland (Wetland A)was delineated adjacent the stream near the toe of the
slope in the eastern portion of the site. The wetland and stream boundaries were
subsequently surveyed by Geodimensions and are depicted on the survey drawing.
Wetland A consists of a Riverine Hydrogeomorphic (HGM) Class that contained an
emergent plant community that was dominated by dense reed canarygrass (Phalaris
arundinacea), cattail (Typha latifolia), and climbing nightshade (Solanum
dulcamara).
A thin strip of beaver chewed trunk sprouted willow (Salix sp.)was observed along
the northern portion of the stream channel.
Soils within the wetland have been mapped by the Natural Resources Conservation
Service (NRCS) as McKenna gravelly silt loam, 0 to 5 percent slopes. Although
hydrology along the outer edge of the wetland boundary was necessarily assumed
based on the presence of a hydrophytic plant community and hydric soils, most of
the soils throughout the interior of the wetland were saturated to the surface at the
time of the site visit.
Attachment A contains data sheets prepared for a representative locations in both
the upland and wetland. These data sheets document the vegetation, soils, and
hydrology information that aided in the wetland boundary delineation.
Yelm Creek is known to support salmonids and requires a 150-foot buffer per YMC
14.08.140.D.2.b. Wetland A appears to meet the criteria for a Category II wetland
with 15 Habitat Points (Attachment B). Category II wetlands with 15 Habitat Points
require a standard 100-foot buffer per YMC 14.08.100.F.6.a.
5.0 WETLAND/STREAM FUNCTIONS AND VALUES
Wetlands, in general, provide many valuable ecological and social functions,
including stormwater storage, water quality protection, groundwater
recharge and discharge, and wildlife habitat. The wetland on the site
provides many of these functions.
The wetland provides stormwater storage areas that trap sediments and
other pollutants. The trapping of sediments and pollutants within the wetland
helps maintain water quality in downstream areas. The wetland also
provides further benefit to wildlife by releasing water slowly during the
summer months, thereby contributing to the base flow of the stream.
In addition to its hydrologic functions, the wetland also provides biological functions.
As a component of the riparian corridor, the wetland and stream provide habitat for a
variety of wildlife species. Another biologic function of the wetlands is the transport
Pedro DeGuzman
December 13, 2014
Page 3
of nutrients (via Yelm Creek) to downstream areas. Nutrients transported to
downstream areas provide biological support for fish and other aquatic wildlife.
Although privately owned, the on-site wetland does provide some cultural
wetland functions as part of the overall open space associated with the Yelm
Creek riparian corridor. The wetland also contains some passive
recreational opportunities such as wildlife viewing.
6.0 PROPOSED PROJECT
No work would be conducted within the 150-foot buffer from Yelm Creek as part of
the proposed redevelopment of the site. However, it is my understanding that the
project does propose to utilize wetland buffer averaging per YMC 14.08.100.F.6.d.
In general, wetland buffer averaging is allowed by the City of Yelm if there is no loss
of buffer function and area and the buffer is not reduced below 75°/o of the standard
buffer.
As part of the buffer averaging plan, 7226 s.f. of buffer area would be reduced and
replaced with 7,877 s.f. of additional buffer resulting in a net increase of 651 s.f. of
buffer area. No part of the wetland buffer would be reduced below 75 feet (i.e., 75%
of the standard buffer).
The proposed buffer reduction and replacement areas consist of periodically mowed
pasture and there would be no loss of significant vegetation or habitat as part of the
proposal. Although no untreated stormwater from pollution generating surfaces will
be discharged into the wetland buffer, it is my recommendation that mowing within
the pasture cease, since the dense herbaceous vegetation will limit the potential of
pollutants and sediment from entering the wetland and stream.
If you have any questions, please give me a call.
Sincerely,
ALTMANN OLIVER ASSOCIATES, LLC
John Altmann
Ecologist
ATTACHMENT A
DATA SHEETS
T� � � ,,, �a' r,.rr� �,�1�-r�.A� � ►�T �-h.
4iV��'I�i��DE`TE�df1�9f�A7'9cDN �,����d�R�m��st��°�a f�fl�qarutafiras,adalleys,a�d���s4 4��gi��a
ProjecUSite:_fi�ACTc�� 5�.l�P�i City/County: ���-� Sampling Date:�� �1 1
ApplicanUOwner. Z�Q-�Fu�v�)t Staie: �+�
— _� , Sampliny Point: fi��_�
investigator(s): 1'�ci.'t"w1�tr.�i� �� Section,To�mship,Range: �E-C 2-�� T l !J R a-�
_�_°(___ � �.W�r�
Lanciform(hiilslope,terrace,etc.): 5��+-� Local relief(concave,convex,none): Cc,.�(C A J E Slope(%):
Subregion(LRR): � Lat: Long: Datum:
Soil Map Unit Name: NWI classification:
Are climatic!hydroloyic conditions on the site typical for this time ofi year? Yes X .. PJo_ {If no,e;cplain in Ramar!<s.)
,-1�-e Vegetation__,Soil ,or Hydrology signiicar.tly distur'oed? Are"Plormal Circumstances"present? Yes � I�lo
f\re�/egatation ,Soil ,or Hydrology_�naturally problematic'? (If needed,expiair any answars in Ran�ari:s.)
:��G�lil��,�1f�F�9��1�9��� �,§���9a sod����a��a�@�a��van���s�rop�s�a�r��e�a8 9�:c:a�����,����s��e�c��, �r���a��d%��a����ff�9r��:�tt�P,
HydrophyYic�legetation PresenE? Yes�_ No �
Hydric Soil Present? Yes_�_ No a�'�$�a�PO������ I
WeUand Hydrology Present? Yes�_ No ����������Ba�aei? V�as� ,g� _
Remarks:
�`t1�P�3�-�f�"'� ASS�+i�'t�i7 g,l�' S�7 6�� ai;tvS �- i(CCzc�d-��a.-�
�E�ETAT�OPd m 11s��cientifiic na�raes of plaea�s.
Absolute Dominant Indicator pominance Test worksheet:
Tree Stratum (Piot size: ) %Cover Soecies? Status Number oT Dominant Species
�• ___ That Are OBL,FACW,or FAC: _____�_„ (q�
,__....._,.._.___�_ _.__.__.__.____., '
_._..___ _._..__._--- _._�_._.__ .___�_ I
. ._,.,._.�__... -
1 o't�!i�ltim5�r oi 3���,m n�i;:
�.__.._.._. _.__..___ ..._.._..... S��eciesAc��ssAil.vtr�t�: �'
._...�..__ __.__._. ___,__...._.
-._`.__.. __._. _.. ,....,_..._,�, • '
,.., �
_..____---_ i
' � ���__.�__� ________��___� �
Percenf of Dominani Species
=Tota!Cover That are OBL,FACV�I,or FAC: ���% (q/��
SaolinalShrub Stratum (Plot size: )
1.
Prevalence Index worksheet:
2.
Total%Cover of: Multi�lv bv:
3.
OBL species x 1 =
4.
FACW specfes x 2=
5.
FAC species x 3=
FACU species x 4=
� =Total Cover
Herb Stratum (Plot size: � �' ) UPL species x 5=
1. Ty��s �c��. o\�c� $cy �_ d$L Column Totals: (A) �g�
2. �.�fS,�trr. Acv2+�sz �� _� E%c.
Prevalencelndex =B/A=
3. R�V��,X Cc��.i S � N �C' yydrophytic Vegetation indicators:
4' X 1-Rapid Test for Hydrophytic Vegetation
5' � 2-Dominance Test is>50%
6' _ 3-Prevalence index is 53.0'
�' 4-Morphological Adaptatlons�(Provide suppbrting
8.. data in Remarks or on a separate sheet)
9. _ 5-Wetland Non-Vascular Plants�
10. _ ProbiemaUc Nydrophydc Vegetation�(Explain)
11. 1lndicators of hydric soil and wetland hydrology must
1 u be present,unless disturbed or problematic.
r � =Total Cover
Woody Vne Stratum (Piot size: � (t )
7. Sa�cw.,,n. c��lz�.w��.tc� � � 'FRG Hydrophytic
� Vegetation
� =Total Cover Present? Yes_� Mo
%Bare Ground in Herb Stratum
Remarks: .
US Army Corps of Englneers . Westem Mountains,Valleys,and Coast-Version 2.0
u09L Sampling Point: T� �
ProfiB�e Description: (Describ�t�o the depth roeeded to docucnero4 the ind'acato�o�cmnfirm the aG�sence o9 indicators.)
Depth Matrix Redox Features
(inches) Color(moist % Color(moist)u % _Tvpe . Loc�_ _Texture Remarks __
Q-1��� _ �4 f I�` f �cd�S —_ _�—.. _____— ._il LT LuriM ---- --
'T e: C=Conceniration,D=De letion,RM=P.educed Mairix,CS=Covered or Coated Sand Grains. ZLocation: PL=Pore Linin ,M=Matrix. `
@�ydric S�'al Ieadi�toPS: (��li�cable t?�alt LR�s,un9e�s o$9�e�iss�amt��ol.) Onc9Bc�l�o�s for Pro6�9�erna3�e Fa��dri��mi8�':
Histosol(A1) _ Sandy Redox(S5) _ 2 cm Muck(A10)
_ Histic Epipedon(A2) _ Stripped Matrix(SS) _ Red Paren4 Material(TF2)
_ Black Histic(A3) _ Loamy Mucky Mineral(F1)(excep4(�1LP.6��]) _ Very Shallow Dark Su�Face(TF12)
Hydrogen Sulfide(A4) _ Loamy Gleyed Matrix(F2) _ Oiher(Explain in Remarl<s)
Depleted Below Dark Su�fiace(A11 j _ Depleted Matrix(F3)
�Thick Dark Surface(Al2) _ Redox Dark Surface(F6) 'Indicators of hydrophytic vegetation anc!
_ Sandy Mucky Mineral(S1) _ Depleted Dark Surface(F7) wetland hydrology must be present,
Sandy Gieyed Matrix(S4) Redox Depressions(F8) unless disturbed or probiematic.
Restrictive Layer(if presentj:
Ty�e' ------------..�
,,_ �' P {� '' i___� _�__.__� ____. - - -- ---- _.._._.. _- - �Jr�ES ;e�83�s���eaN r e� x y i
' u2 ti! i�.'s'i2s'. ��'�.
_ '_.. . .__ '_"..._. ...I__—. ��,,. ,.-_�__.—_-
,, .._____ ___ ."__'_'_
� 2ernarks: __..---___._,
'�ilfDF20LOfzY
1Netland Mydrology Indicators:
Primarv Indfcators(mfnimum of one reauired;check all that aootvl Secondarv Indicators(2 or more reouiredl
_ Surface Water(A1) _ Water-Stained Leaves(B9)(excep4 _ Water-Stained Leaves(69)(�/ILR.A 1,2,
_ High Water Table(A2) MLRA 1,2,4A,and 4B) 4A,and 48)
_ Saturation(A3) _ Salt Crust(B1 i) _ Dralnage Patterns(B 10)
Water Marks(61) _ Aquatic Invertebrates(B13) _ Dry-Season Water Tabie(C2)
_ Sediment Deposits(82) _ Hydrogen Sulflde Odor(C1) _ Saturation Visible on Aerial Imagery(C9)
_ Dr'rft Deposits(63) _ Oxidized Rhizospheres along Living Roots(C3) _ Geomotphic Position(D2)
_ Algal Mat or Crust(64) _ Presence of Reduced Iron(C4) _ Shallow Aquitard(D3)
_ Iron Deposits(65) _ Recent Iron Reduction In Tilled Soils(C6) _ FAFNeutral Test(D5)
_ Surface Soil Cracks(66) _ Stunted or Stressed Plants(D1)(LRR A) _ Raised Ant Mounds(D6)(LRR A)
_ Inundation V9sible on Aerial Imagery(B7) _ Other(Explain tn Remarks) _ Frost-Heave Hummocks(D7)
_ Sparsely Vegetated Concave Surface(BS)
Field Observatlons:
Surfa�Water Present? Yes No � Depth(fnches):
Water Table Present? Yes No X Deptli(inches):
Saturatlon Present? Yes No X Depth(Inches): Wetiand Flydrology Peesent? Yes X Flo
Includes ca ill ftin e
Describe Recorded Data(stream gauge,monitoring well,aerial photos,prevlous inspectlons),if available:
Remarks: �r
�jo�� s�}-�vlL���U Tc; S�'(=Nt�E N�RR�1 . �av,�dA�-7 7���N�}-r��)
��h V�(3�.i�rT�3rJ �i(1-M✓�CK�
US Army Corps of Engineers Western Mountains,Valleys,and Coast–Version 2.0
' ��P � 2 ^- I o` r�Y�-� v����� �t � A -,�
UU���PJD D�`T��3tiflIP��T9�PJ ���e��O�i�m'�1i�st�rt��o�dm�aaa4airo�,�alleys,anc8��a,s�atega��e
Projeci/Site: T'i�cCT�;� ���P�-i City/County:_ 1 �L� Sampling Date: yL �l f�
ApplicantlOwner TEtt���FJ�2�� ` in�� Sampling Point:_T1��_�;_
Sta1e:
Irniestigator(s):A��-TV"1 h rJ►, Section,Township,Ranye:�_C Z`� T 1 1 N }��E iiJ,Iny,
/-----f
Landform(hiilslope,terrace,eic.): S L-�'�E Local relief(concave,convex,none): Cu,�t�1✓� Slope(°/):
Subregion(LRR):_ A La2: Long: Datum:
Soil Map Unit�lame: NWI classification:
t�re climatic!hydrologic conditi�ns on ti�e site typicai for this�ime oi year? Yes�., hJo (If no,explain in Ramar{<s,) � i�
;-�re Vegefation,_,Soil ,or Hydrology,�V significar.tly disturbed? Rra"I�lormal Ciro�imstances"prosenl? Yes�,^ i�10���
;-\re Vegetation ,Soii__,or Hydroloyy ��aturafly problemaUc? (If needed,explain any answers in Rernarks.)
��1�11l���'��F�9�����9��� �a��c8a�Ba�e��ga�6a��u�a���a°�a�9����a��uaR 9���,ti���;da��aa���°��, ��rs���?��u����7�r49r�b;;���ti,
Flydrophytic�Iegetation Present? Yes_ No �
Hydeic Soil Presen?? 'fes P�lo X Os tCae Sana�9eo1 Ad aa
WeUand Hydrology Present? Yes �.�o ( w�1hir�a",ftfe8l�rad? V�s ���gm
Remarks:
�EGE'fATl�i�m Us�scient��a o�arra��of pBanfs.
Absolute Dominant Indicator pominance Yes4 worksheet:
Tree Stratum (Plot size: ) %Cover Soecies? Status p�umber of Dominant Species
�• ___ ?hat Are OBL,FACW,or FAC: ___� W_y (A)
1
____.-_ __---__ _...._�.__�.__.____..�____�____. __,_.__ __.___.__. ..___. _...._.__... 7o'ial�lt�tiib�r cr�ra.=���»i:t j
! Species Ac; ��nll 3ir-�t,: �" '-i i
_..._._ _ .-- ._._ ..,._...... . __..__. _____. _W___. _,_.____ ,._.
_._.._.___._ .._._�._.._.__
ILL�'�� � � -- Percant of Dorninanf Specias � I
—Total Cover That Are OBL,FAC1N,or FAC: 5 �q/g�
Sa�linalShrub SVatum (Plot size: )
1.
Prevalence Index worksheet:
2.
Total%Cover of: Multi�lv by
3.
OBL species x 1 =
4.
FACW species x 2=
5 FAC species 2—f7 x 3= ��
FACU species � x 4= ��-`�
=Total Cover
Herb Stratum (Plot size: � � � ) UPL species x 5=
1. ��ic�yli5 a�o�^^2C�.�C �p �`�� ��{'� ColumnTotals: �'=v (Aj �g� (g)
2. C.���;....w. �J'�/L�S�. �a l'�i (�G �.�
Prevalence Index =B/A=
3' Nydrophytic Vegetation Indlcators:
4' _ 1-Rapid Test for Hydrophydc Vegetation
5' 2-Dominance Test is>50%
s' 3-Prevalence Index is 53.0'
7' 4-Morphologlcal Adapta8ons'(Provide suppbrting
8.. data fn Remarks or on a separate sheet)
9. 5-WeBand Non-Vascular Plants'
10. _ Problematic Hydrophytic Vegetation�(Explain)
91. 'Indicators of hydric soil and wetland hydrdogy must
�v� =Total Cover �p�sent,unless disturbed or problemat(c.
Woody�ne Stratum (Plot size: 1
�' Hydrophytic
2. Vegetation x
=Total Cover Presentl Yes No
%Bare Ground in Herb Stratum
Remarks:
US Army Corps of Engineers . Western Mountains,Vaileys,and Coast—Version 2.0
�OIL Sampling Point: �1 z
ProffiBe�escri�tion: (Describe to the depth roeeded to docuenen4 the indicatoa or conf�rre dhe a�se�ace ofi indic�tors.)
Depth Matrix Redox Features
inchesL_ Color(moisfl _ °�/ _ Color�moist)_ % _Tvpe Loc' _ Texture ___ Remarks _ ` _
� i��� 1 O`�F Z 2 1 oa .�- - ---- -------� --`�!��!"� ---- ---
�T e: C=Concentra9ion,D=De letion,P.M=P.educe�Matrix,CS=Covered or Coaied Sand Grains. ZLocation: PL=Pore Linin ,N1=Matrix.
�7ydric Soi9 ls�dicatora: (�1p�li�cab6�4o al��RRs,ura9�ss oBhe�AS�e aaot��.a 9�n�1ic�4ravs 4or�ro�9�eo�a��c�ivdric��ils3: ^-
Histosol(A1) _ Sandy Redox(S5) _ 2 cm Muck(A10)
Histic Epipedon(A2) __ Stripped PAatrix(S6) _ Red Parent Material(TF2)
Black Histic(A3) _ Loamy Niucky Mineral(F1)(excegs4�lL�9) ^ Very Shallow Dark Surface(TF12)
_ Hydrogen Sulfide(A4) _ Loamy Gleyed Matrix(F2) _ Other(Explain in Remarics)
Depleted Below Dark Su�fiace(A11) _ Depleted Matrix(F3)
Thick Dark Surface(Al2) _ Redox Dark Surface(F6) 'Indicators of hydrophytic vegetation and
Sandy Mucky Mineral(S1) _ Depleted Dark Surface(F7) wetfand hydrology must be present,
Sandy Gleyed Matrix(S4) Redox Depressions(F8) unless disturbed or problematic.
Restrictive Layer(if present):
TYPe� ._ _______
` �apth{I�;ci�as}• � �!�' �a :���2 a 3>a,-3e. ._ 9. )C �
; ___... . .,. --- _ __ i ._.� __� __.---
- ---- - --- ---- - -_.... __ - ,.
__.____,.__.--._ ..----___...__ ._
_ ..----- — -- -
�emarlc�: --- _.__ _ ___,
�iYDFtOLOGY
�Yetland Hydroiogy Indica4ors:
Primarv Indicators(minimum of one reouired:check all that a�olvl Secondarv Indicators(2 or more reauiredl
Surface Water(A1) _ WatervStained Leaves(B9)(except _ Water-Stained Leaves(69)(MLRA 1,2,
High Water Table(A2) MLRA 1,2,4A,and 4B) 4A,and 4B)
Saturation(A3) _ Salt Crust(611) _ Drainage Patterns(610)
Water Marks(B1) _ Aquattc Invertebrates(613) _ Dry-Season Water Table(C2)
_ Sediment Deposits(B2) _ Hydrogen Sulfide Odor(Ci) _ Saturatlon Vislble on Aerial Imagery(C9)
Drift Deposits(B3) _ Oxidized Rhizospheres along Living Roots(C3) _ Geomorphic Position(D2)
_ Algal Mat or Crust(B4) _ Presence of Reduced Iron(C4) _ Shallow Aquitard(D3)
Iron Deposits(B5) _ Recent Iron Reduction in Tllled Soils(C6) _ FAGNeutral Test(D5)
Surface Soil Cracks(B6) _ Stunted or Stressed Plants(D1)(LRR A) _ Raised Ant Mounds(D6)(LRR�e)
Inundation Visible on Aerial Imagery(B7) _ Other(Explain fn Remarks) _ Frost-Heave Hummocks(D7)
_ Sparsely Vegetated Concave Surtace(68)
Field ObservaHons:
Surtace Water Present? Yes No � Depth(inches):
Water Tab�e PresenYl Yes No_� Depth(inches):
Saturatlon Present? Yes No � Depth(inches): iMetland Hydrology PeesenYP Yes No X
Indudes ca illa frin e
Describe Recorded Data(stream gauge,monitoring well,aerial photos,previous InspecUons),if available:
Remarks:
U5 Army Corps of Engineers Western Mountains,Valleys,and Coast-Verslon 2.0
��i�qMIlllillM111WY9YM1�1�Olrlrii �YMiFwIMYl��1 . . . .--_ --- . . ..
ATTAC H M E N T B
WETLAN D RATI N G
Wetland name or number �
WETLAND RATING FORM—WESTERN WASHINGTON
Version 2-Updated July 2006 to increase accuracy and reproducibility among users
Updated Oct 2008 with the new WDFW definitions for priority habitats
Name of wetland(if known): �(p�'j 3� S� j a� S f:. Date of site visit: i� �?I�`r
Rated by �L 1 M Pt i.i�} Trained by Ecology? Yes �s No_ Date of training tg� c�
SEC:2.�TWNSHP: �'I 1J RNGE: %-� Is S/T/R in Appendix D? Yes No X
Map of wetland unit: Figure Estimated size
SUMMARY OF RATING
Category based on FUNCTIONS provided by wetland
I II�C III IV
Score for Water Quality Functions
Category I=Score>=70 �
Category II=Score 51-69 Score far Hydrologic Functions ��
Category III=Score 30-50 Score for Habitat Functions j �
Category N=Score<30
TOTAL score for Functions �,
Category based on SPECIAL CHARACTERISTICS of wetland
I_ II Does not Apply 7C
Final Category ��noose tne"highest" category from above) ��'
Summary of basic information about the wetland unit
Wetlarid iTnit.tias Special . Wetland HGM Class'
Char"acferistics, . _ used for.Ratin
Estuarinc De ressional
Natural Herita e Wetland Riverine �C
B� Lake-frin e
Mature Forest Slo e
Old Growth Forest Flats
Coastal La oon Freshwater Tidal
Interdunal
None of the above ,� Check if uuit has multiple
HGM classes present
Wetland Rating Form—westem Washington 1 August 2004
version 2 To be used with Ecology Publication 04-06-025
Wetland name or number�_
R Riverine and Freshwater Tida1 Fringe Wetlands ;Points
WATER QUALITY FUNCTIONS - Indicatars that wetland functions to improve (°nly 15�°re
,per box)
water uality
R R 1. Does the wetland unit l�ave the uotential to improve water quality? (see p.52)
R R 1.1 Area of surface depressions within the riverine wetland that can trap sediments Figure_
during a flooding event:
Depressions cover>3/4 area of wetland points=8
Depressions cover> 1/2 area of wetland points=4
If depressions>'h of area of unit draw polygons on aerial photo or map �
Depressions present but cover< 1/2 area of wetland points�
No de ressions resent oints–
R R 1.2 Characteristics of the vegetation in the unit(areas with>90%cover at person height): Flgu�e_
Trees or shrubs>2/3 the area of the unit points=8
Trees or shrubs> 1/3 area of the unit points=6
Ungrazed,herbaceous plants>2/3 area of unit points� f
Ungrazed herbaceous plants> 1/3 area of unit points– ��
Trees, shrubs,and ungrazed herbaceous<1/3 area of unit points=0
Aerial hoto or ma showing ol ons of different ve etation t es
R Add the points in the boxes above � � �
R R 2.Does the wetland unit have the opportunity to improve water quality? (see p.53)
Answer YES if you know or believe there are pollutants in groundwater or surface water
coming into the wetland that would otherwise reduce water quality in streams,lakes or
groundwater downgradient from the wetland?Note which of the following conditions
provide the sources of pollutants. A unit may have pollutants coming fi•om several
sources, but any single source would qualify as opportunity.
— Grazing in the wetland or within 150ft
— Untreated stormwater discharges to wetland
— Tilled fields or orchards within 150 feet of wetland
— A stream or culvert discharges into wetland that drains developed areas,
residential areas,farmed fields,roads,or clear-cut logging
� Residential,urban areas,golf courses are within 150 ft of wetland
— The river or stream linked to the wetland has a contributing basin where human
activities have raised levels of sediment,toxic compounds or nutrients in the river
water above standards for water quality multiplier
— Other �
YES multiplier' 2� NO multiplier is 1
R TOTAL-Water Quality Funetions Multiply the score from R 1 by R 2 �`
Add score to table on . I ��'
Comments
Wetland Raring Form—western Washington 7 August 2004
version 2 Updated with new WDFW definitions Oct.2008
I
Wetland name or number �
jt. Riverine and Freshwater Tidal Fringe Wetlands Points
HYIDROLOGIC FiJNCTIONS - Indicators:that wetland functions to reduce (°n�y l s�°r�
per box)
` flooding and stream"erosiori
R 3. Does tbe wctland unit have the potential to reduce flooding and erosion? (seep.54)
R R 3.1 Characteristics of the overbank storage the unit provides: Figure_
Estimate the average width of the wetland unit perpendicular to the direction of the
flow and the width of the stream or river channel(distance between banlcs). Calculate
the ratio: (average width of unit)/(average width of stream between banks). �
If the ratio is more than 20 points� �
If the ratio is between 10-20 points 6
If the ratio is 5 - <10 points=4
If the ratio is 1 -<5 points=2
If the ratio is< 1 points= 1
Aerial hoto or ma showin avera e widths
R R 3.2 Characteristics of vegetation that slow down water velocities during floods: Treat Figure_
large woody debris as 'forest or shrub". Choose the points appropriate for the best
C�eSCYiption.(polygons need to have >90%cover at person height NOT Cowardin classes):
Forest or shrub for>1/3 area OR herbaceous plants>2/3 area points� �
Forest or shrub for> 1/10 area OR herbaceous plants> 1/3 area points=4
Vegetation does not meet above criteria points=0
Aerial hoto or ma showin ol ons of different ve etation t es
R Add the points in the boxes above � � �
—�—
R R 4.Does the wetland unit have the opuortunity to reduce flooding and erosion? (see p.57)
Answer YES if the unit is in a location in the watershed where the flood storage,or
reduction in water velocity,it provides helps protect downstream property and aquatic
resources from flooding or excessive and/or erosive flows. Note which of the following
conditions apply.
� There are human structures and activities downstream(roads,buildings,bridges,
farms)that can be damaged by flooding.
� There are natural resources downstream(e.g. salmon redds)that can be damaged
by flooding
— Other multiplier
(Answer NO if the major soicrce of water to the wetland is controlled by a reservoir or the ,,�
wetland is tidal frin along the sides of a dike)
YES multiplier i 2 NO multiplier is 1
R TOTAL -Hydrologic Functions Multiply the score from R 3 by R 4 �f_
Add score to table on p. 1 Y�
Comments
Wetland Rating Form-western Washington 8 August 2004
version 2 Updated with new WDFW definitions Oct.2008
Wetland name or number�
These.questions apply to;wetlancls of all HGM classes. % Points
� � � (only 1 score
HABITAT FUNC`TIONS.-In`dicators that umt functions to provide irriportant habitat ��T box>
H 1. lloes the �vetland unit have the notential to provide habitat for many species?
H 1.1 VeQetation structure(see p. 72) Figure_
Check the lypes of vegetation classes present(as defined by Cowardin)-Size threshold for each
class is '/acre or more than 10%of the area if unit is smaller than 2.5 acres.
Aquatic bed
�(' Emergent plants
Scrub/sluub(areas where shrubs have>30%cover)
Farested(areas where trees have>30%cover)
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 �
Add the number of vegetation structur�es that qual�. If yoa�have:
4 structures or more points=4
Map of Cowardin vegetation classes 3 structures points=2
2 structures points=1
1 structure points=0
H 1.2.Hydroperiods(see p. 73) Figure_
Check the types of water regames(hydroperiods)present within the wetland. The water
regime has to cover more than 10%of the wetland or'/a acre to count. (see text for
descriptions of hydroperiods)
Permanently flooded or inundated 4 or more types present points=3
�Seasonally flooded or inundated 3 types present points�2 y
Occasionally flooded or inundated 2 types present point—l� �
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 Map of hydroperiods
H 13.Richness of Plant Species(see p. 75)
Count the number of plant species in the wetland that cover at least 10 ftZ. (different patches
of the same species can be combined to meet the size threshold)
You do not have to name the species.
Do not include Ec�rasian Milfoil, reed canarygrass,purple loosestrife, Canadian Thistle
If you counted: > 19 species points�
List species below if you want to: 5 - 19 species points
<5 species points=0 �
Total for page �
Wetland Rating Form—western Washington 13 August 2004
version 2 Updated with new WDFW definitions Oct.2008
Wetland name or number�
H 1.4.Interspersion of habitats(see p. 76) igure_
Decide from the diagrams below whether interspersion between Cowardin vegetation
classes(described in H l.l),or the classes and unvegetated areas(can include open water or
mudflats)is high,medium,low,or none.
0 0
None=0 points Low�point Moderate=2 points
;���� ���'� �z " .. �
,� ..� �:
, � ,` +
�;
�;;�,
—! � [riparian braided channels]
High =3 points
NOTE: If you have four or more classes or three vegetation classes and open water
the rating is always"high". Use map of Cowardin vegetation classes
H 1.5. Special Habitat Features: (see p. 77)
Check the habitat features that are present in the wetland. The nacmber of checks is the
number of points you put into the next column.
�Large,downed,woody debris within the wetland(>4in.diameter and 6 ft long).
�Standing snags(diameter at the bottom>4 inches)in the wetland
�Undercut banks are present for at least 6.6 ft(2m)and/or overhanging vegetation extends at � ��
least 3.3 ft(lm)over a stream(or ditch)in,or contiguous with the unit,for at least 33 ft Vf
(l Om) '�
�Stable steep banks of fine material that might be used by beaver or muskrat for denning
(>30degree slope)OR signs of recent beaver activity are present(cut shrubs or trees that
have not yet tt�rned grey/brown)
At least'/4 acre of thin-stemmed persistent vegetarion or woody branches are present in areas
that are permanently or seasonally inundated.(structures jor egg-laying by amphibians)
Invasive plants cover less than 25%of the wetland area in each stratum of plants
NOTE: The 20%stated in early printings of the manual on page 78 is an error.
H 1. TOTAL Score- potential for providing habitat � � � +,
Add the scores from Hl.l, H1.2, H1.3, H1.4, HI.S � L'� �
����J
Comments
Wetland Rating Form—westem Washington 14 August 2004
version 2 Updated with new WDFW definitions Oct.2008
Wetland name or number�
H 2.Does the wetland unit have the opportunity to provide habitat for many species?
H 2.1 Buffers (see p. 80) Figure_
Choose the description that best represents condition of buffer of wetland unit. The highest scoring
criterion t12at applies to the wetland is to be used in the rating. See text for definition of
"undisturbed."
— 100 m(330ft)of relatively undisturbed vegetated azeas,rocky areas,or open water >95%
of circumference. No structures are within the undisturbed part of buffer. (relatively
undisturbed also means no-grazing,no landscaping,no daily human use) Points=5
— 100 m(330 ft)of relatively undisturbed vegetated areas,rocky areas,or open water >
50% circumference. Points=4
— 50 m(170ft)of relatively undisturbed vegetated areas,rocky areas,or open water>95%
circumference. Points=4
— 100 m(330ft)of relatively undisturbed vegetated areas,rocky areas,or open water>25%
circumference,. Points=3
— 50 m(170ft)of relatively undisturbed vegetated areas,rocky areas,or open water for>
50%circumference. Points=3
If buffer does not meet any of the criteria above
— No paved areas(except paved trails)or buildings within 25 m(80ft)of wetland>95% �
circumference. Light to moderate grazing,or lawns are OK. Points=2
— No paved areas or buildings within SOm of wetland for>50°/a circumference. -
Light to moderate grazing,or lawns are OK. Points l
— Heavy grazing in buffer. Points�
— Vegetated buffers are<2m wide(6.6ft)for more than 95%of the circumference(e.g.tilled
fields,paving,basalt bedrock extend to edge of wetland Points=0.
— Buffer does not meet any of the criteria above. Points=1
Aerial photo showing buffers
H 2.2 Corridors and Connections(see p. 81)
H 2.2.1 Is the wetland part of a relatively undisturbed and unbroken vegetated corridor
(either riparian or upland)that is at least 150 ft wide,has at least 30%cover of shrubs,forest
or native undisturbed prairie,that connects to estuaries,other wetlands or undisturbed
uplands that are at least 250 acres in size? (dams in riparian corridors,heavily used gravel
roads,paved roads, are considered breaks in the corrido. . �
YES=4 points (go to H 2.3) ��go to H 2.2.2
H 2.2.2 Is the wetland part of a relatively undisturbed and unbroken vegetated corridor
(either riparian or upland)that is at least SOft wide,has at least 30°/o cover of shrubs or j
forest,and connects to estuaries,other wetlands or undisturbed uplands that are at least 25 �
acres in size? OR a Lake-fringe wetland,if it does not have an undisturbed corridor as in
the question above?
YES=2 points (go to H 2.3) NO H 2.2.3
H 2.23 Is the wetland:
within 5 mi(8km)of a brackish or salt water estuary�OR/,/�,
within 3 mi of a large field or pasture(>40 acres)OR� !'l�S�'��
within 1 mi of a lake greater than 20 acres?
YES=1 point NO=0 oints
Total far page �"
Wetland Rating Form—western Washington 15 August 2004
version 2 Updated with new WDFW definitions Oct.2008
Wetland name or number �'t
H 23 Near or adjacent to other prioritv habitats listed by WDFW(see new and complete
descriptions of WDFW priority habitats,and the counties in which they can be found,in
the PHS report httv://wdfrv.wa.,�ov/hab/vhslist.htm)
Which of the following priority habitats are within 330ft(100m)of the wetland unit?NOTE: the
connections do not have to be relatively undisturbed.
Aspen Stands: Pure or mixed stands of aspen greater than 0.4 ha(1 acre).
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 p. 152).
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,fornung a multi-layered canopy with occasional small openings;with at least 20
trees/ha(8 trees/acre)>81 cm(32 in)dbh or>200 years of age. (Mature forests) Stands
with average diameters exceeding 53 cm(21 in)dbh;crown cover may be less that 100%;
crown cover may be less that 100%;decay,decadence,numbers of snags,and quantity of
large downed material is generally less than that found in old-growth; 80-200 years old
west of the Cascade crest.
Oregon white Oak: Woodlands 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).
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(/'icll descriptions in WDFW PHS report p. 161).
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:pp. 167-169 and glossary in
Appendix A).
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 7.6 m(25 ft)high and occurring below 5000 ft.
Talus:Homogenous areas of rock rubble ranging in average size 0.15 -2.0 m(0.5 -6.5 ft),
composed of basalt,andesite,and/or sedimentary rock,including riprap slides and mine
tailings.May be associated with cliffs.
Snags and Logs: Trees are considered snags if they are dead or dying and exhibit su�cient
decay characteristics to enable cavity excavation/use by wildlife.Priority snags have a
diameter at breast height of>51 cm(20 in)in western Washington and are>2 m(6.5 ft)in
height. Priority logs are>30 cm(12 in)in diameter at the largest end, and>6 m(20 ft)
long.
If wetland has 3 or more priority habitats=4 points
If wetland has 2 priority habitats=3 points
If wetland has 1 priority habitat=1 point No habitats=0 points
Note:All vegetated wetlands are by definition a priority habitat but are not included in this
list. Nearby wetlands are addressed in question H 2.4)
Wetiand Rating Form—western Washington 16 August 2004
version 2 Updated with new WDFW definitions Oct.2008
Wetland name or number�
H 2.4 Wetland Landscape (choose the one description of the landscape around the wetland that
best fits)(see p.84)
There are at least 3 other wetlands within 1/z mile,and the connections between them are
relatively undisturbed(light grazing between wetlands OK,as is lake shore with some
boating,but connections should NOT be bisected by paved roads,fill, fields,or other
development. points=5
The wetland is Lake-fringe on a lake with little disturbance and there are 3 other lake-fringe
wetlands within'/z mile points=5
There are at least 3 other wetlands within'h mile,BUT the connections between them are
disturbed points 3��,. '�-��
The wetland is Lake-fringe on a lake with disturbance and there are 3 other lake-fringe
wetland within'/z mile points=3
There is at least 1 wetland within'/z mile. points=2
There are no wetlands within'/z mile. points=0
H 2.TOTAL Score- opportunity for providing habitat I I
Add the scores from H2.I,H2.2,H2.3, H2.4 � � �
TOTAL for H 1 from page 14 �
Total Score for Habitat Functions —add the points for H 1,H 2 and record the result on i�
p. 1
, .�
Wetland Rating Form—westem Washington 17 August 2004
version 2 Updated with new WDFW definitions Oct.2008