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HomeMy WebLinkAboutCRITICAL AREA REVIEW WETLAND VERIFICATION - OT General - 7/1/2023 (0fifiiiiiite)d / Z 0 -.3 is r ":. f ,t - ' sc �`pT4 Fes`•. _ - 1 1¢S'� `•' .. _ '�-. -- �• "iF-r t r, - •'fi , a � '1f 1 - .-4-• .ay'. .'? tnr - 201 NE,Sund own Dr `CIF r �` `� .�+a� © t ~. P 7,--"")41.-4•H , — 1. CRITICAL AREA REVIEW Wetland Verification Prepared By: C3 Habitat 4806 130th ST CT NW Gig Harbor, WA 98332 Prepared For: Debra and Philip Freund 201 NE Sundown DR. Tahuya, WA 98588 Contents INTRODUCTION 1 PROJECT DESCRIPTION 1 CRITICAL AREA REVIEW BACKGROUND 3 WETLANDS 3 STREAMS 3 PRIORITY HABITAT AND SPECIES 3 CONCLUSION 3 a. C3 Habitat 4806 130th ST CT NW—Gig Harbor, WA 98332 Phone 360-471-5416 Fax 800.756.0996 Cii)3 Habitat Corp. WETLANDS & HABITAT MITIGATION & CONSULTING INTRODUCTION C3 Habitat (C3) has conducted an evaluation of the current site conditions found at the property located at 201 NE Sundown Drive, Tahuya Washington. C3 assessed the property for any critical area and/or its buffer that would impose any land use restrictions for the proposed septic system. Two on-site wetlands located in the NW corner and southern portion of the property have been previously delineated in 2007. The wetlands are Category 4 and require a 50-foot buffer from the delineated edge of the wetland. The wetlands were delineated in 2007 and require a verification/update. No other critical area was found onsite. C3 confirmed the presence, location and rating of the wetlands in July of 2023. This report will verify the findings from the original delineation. The site is found in Section 31, Township 23N, and Range 2W (Tax ID#22310-79-90663). See Site Vicinity Map—Figure 1.The property is irregular in shape and situated along Sundown Drive along the southern property line.The parcel is surrounded by developed and undeveloped single-family tax parcels. The property is 1.87-acres in size. PROJECT DESCRIPTION A new septic system is proposed replacing the old septic system. The site currently has a single- family residence with detached garage and driveway. The existing septic tank and drainfield system will be decommissioned. The nearest septic feature is 64-feet to the nearest wetland. See attached proposed site plan. There are 2 on-site wetlands on the subject property which have been professionally delineated in 2007. Both were rated as Category 4 depressional systems. The proposed site activity for this project is outside of both wetlands' prescriptive buffers. C3 had the wetland boundary map in hand during the field study to confirm the wetland was still accurately located and using a GPS handheld device, relocated the wetland boundaries. All findings agree with the previous wetland study. C3 Habitat 4806 130th ST CT NW—Gig Harbor, WA 98332 Phone 360-471-5416 Fax 800.756.0996 'FREUND WETLAND] FIGURE 1. SITE VICINITY MAP .."'" - f 4. , . e , ..' ir/ . . A i ( , ,..1. ,.. . 'r •14_ :' I r, 1 141*4' 14,, F 4 4-` .... ••:' if' - t \ 4 • '114 tir ., , ,i..„- 7, . .. a, .. rAr. ... ir.414. ;#0•10"1", '''' ...v. .4 3 16 '0 4 ''' ,q, I 44 p r .. • ,$ 010110., ,.‘iii" ', .A ...... ,,, ,,... _ ...., , .... , _ ..,.. , . . ,., ,•„.. . .... e , ‘ i il „..$,.... 11.,,.• .0011.61' )1socr. ,, ,. If A a: , CN1 C-C C.; C3 Habitat 4806 130th ST CT NW—Gig Harbor, WA 98332 Phone 360-471-5416 Fax 800.756.0996 'FREUND WETLAND' CRITICAL AREA REVIEW BACKGROUND WETLANDS There are no inventoried wetlands depicted on the National Wetland Inventory on or near the subject property. The nearest inventoried wetland is 431-feet to the south. There are two wetlands within the subject property. An assessment of the wetlands was performed in July of 2023. Both wetlands are hydrologically isolated from each other and are created by stormwater runoff. Two test plots were established, and soil test pits were dug to confirm the previously delineated and mapped wetlands. Soils were confirmed to be consistent with the previous findings described in the 2007 professional wetland study as well as hydrology and vegetation data. Both wetlands were rated using the latest Washington State Department of Ecology Rating System for Western Washington. Both wetlands scored a total of 15 points for Category 4 wetlands. The scoring breakdown of the Category 4 wetlands are as follows: scored 6 for Improving Water Quality, scored 4 for Hydrologic function and scored 5 for Habitat for a total of 15 points. The old and new version of the rating forms are both consistent in scoring and reference. See Figure 2 — NWI Map STREAMS There are no streams within proximity of the subject parcel that would impose any restrictions to the property. See Figure 3 - FPARS PRIORITY HABITAT AND SPECIES The property was assessed both on the ground and reviewed through online resources that inventory priority habitat and species. According to the Washington State Department of Fish and Wildlife Priority Habitat and Species mapping resource (PHS), no state candidate, priority, threatened or endangered species are found within close proximity of the subject property. Field review found no habitat features that require restrictions to the property. See Figure 4- PHS map. CONCLUSION This report verifies and concludes that the on-site wetlands delineated in July of 2007 are currently accurately located in the field and that the Category 4 rating applied in 2007 is still consistent today using the most updated Washington State Department of Ecology rating and scoring system. The onsite Category 4 Wetlands require a total buffer of 50-feet using Chapter 21.64—Table 3. Buffer requirements, in feet, for Applicants Choosing Not to Provide Corridor or Implement Measures in Table 2. If the applicant wishes to reduce the buffer to 40-feet, the applicant must meet the conditions outlined in the below table. m Ct a C3 Habitat 4806 130th ST CT NW-Gig Harbor, WA 98332 Phone 360-471-5416 Fax 800.756.0996 [FREUND WETLAND] Table 2.Impact Minimization Measures Activities and Uses that Cause Examples of Measures to Minimize Examples of Disturbance Disturbances Impacts Lictivs • Parking lots • Direct lights away from wetland • Comnrercial'industrial • Only use lighting where necessary for • Residential public safety and keep lights off when not • Recreation(e g athletic fields) needed • Agricultural buildings • Use motion activated lights • Use full cut-off filters to cover light bulbs and direct light only where needed • Limit use of blue-white colored lights in favor of red-amber hues • Use lower intensity LED lighting • Dim light to the lowest acceptable intensity Noise • Commercial • Locate activity that generates noise • Industrial away from wetland • Reczeation leg athletic fields • Construct a fence to reduce noise bleachers etc) impacts on adjacent wetland and buffer • Residential • Plant a strip of dense shrub • Agriculture vegetation adjacent to wetland buffer Toxic runoff' • Parking lots • Route all new untreated runoff away • Roads front wetland while ensuring wetland is • Commercial/industrial not dewatered • Residential areas • Establish covenants limiting use of • Application of agricultural pesticides pesticides within 150 ft of wetland • Landscaping • Apply integrated pest management • Agriculture Stormwater runoff • Parking lots • Retrofit stormwater detention and • Roads treatment for roads and existing adjacent • Residential areas development • Commercial/industrial • Prevent channelized or sheet flow • Recreation from lawns that directly enters the buffer • Landscaping/lawns • Infiltrate or treat detain and disperse • Other impermeable surfaces. new runoff from impervious surfaces and compacted soil etc lawns Pets and human • Residential areas • Use privacy fencing disturbance • Recreation • Plant dense native vegetation to delineate buffer edge and to discourage disturbance • Place wetland and its buffer in a separate tract • Place signs around the wetland buffer every 50-200 ft and for subdivisions place signs at the back of each residential lot • 4'hen platting new subdivisions, locate greenbelts stormwater facilities or other lower-intensity land uses adjacent to wetland buffers Dust • Tilled fields • Use best management practices to • Roads control dust ' These examples are not necessarily adequate for minimizing toxic runoff if threatened or endangered species are present at the site ,y 1 1 C3 Habitat 4806 130th ST CT NW—Gig Harbor, WA 98332 Phone 360-471-5416 Fax 800.756.0996 IFREUND WETLANDI Mill The wetland boundaries depicted on the septic site plan in green dashed lines was located via handheld GPS. All current proposed site activity/development is outside of the restrictive buffer. No other critical area was found on or near the site. C3 Habitat Christy Christensen(Project Biologist) 4806 130`h ST CT NW GIG HARBOR,WA 98332 (360)471-5416 Christy Christensen—C3 Habitat Ln rc C3 Habitat 4806 130th ST CT NW—Gig Harbor, WA 98332 Phone 360-471-5416 Fax 800.756.0996 Figure 2. NWI MAP IFREUND WETLAND' r 14 c " . '. ".. " ilk t" :. -:,/ a -' t.r ,, rt. eir: N ' •wi's t.. ...0).0. . .... . . . • fir '— ~ �`, /4 ' ' ;;4 . .4 i. ...0 me —%_:-,..*.,rf ' .7.`r • .,. 1...—*.,.. ..''Ilf .';',4, ,"*" t .,, 1 i - .� . +_�.�,, +�'",�" ,� ma _ C v ca a- C3 Habitat 4806 130th ST CT NW—Gig Harbor, WA 98332 Phone 360-471-5416 Fax 800.756.0996 IFREUND WETLAND] Figure 3. FPARS MAP 1707266----J I r `1 .:___1 li } • 11111. s, Ro1w _. __ —1 _ iI r • i , i oxiVr......i._.__.v,.."_„v_„,; or_ C 2 C3 Habitat 4806 130th ST CT NW—Gig Harbor,WA 98332 Phone 360-471-5416 Fax 800.756.0996 !FREUND WETLAND] Figure 4. PHS MAP •, .c- - , I G ),,,,, . , Inuititil ' f:1) _/ .1 * fr : ii. i ._.''A.w'i re ` >. ia 46.. i ' e t' 1 CO a ttO fa a. C3 Habitat 4806 130th ST CT NW—Gig Harbor,WA 98332 Phone 360-471-5416 Fax 800.756.0996 r 7 2D6.54 �Nr Seasonal Ponding Drainage /-y - Category 4 Wetland -.`' s SL#1 0"-22"Sand Loam / 23"Compact layer i/ O DriveKay SL#2 0"-22"Sand Loam 70' 23"Compact layer SL#3 0"-25"Sand Loam 7 4' 26"Compact layer 0 1°14 Drivew- e cad e' 1 3 Bedroom 2<0-^ 26'8" X 70' M Home t ' • O� Gpntr015it4a'm CoFP�t pump . • • i 0, 24' /p co- c _.. �* 1' N 2� �o ccc\ •I�/l� I t�fl 0��,�� �aa�a `ao a 00 Q PO Qc- QJe y/6 , O / Qo� 5 R x100. ! cs ese� / 5e S., eer // �� 71' To Thdq i deer of t \ -- I'off ,,• TIE f �, ' Drainage Culvert --� ' �' t1i Seasonal Ponding- f -7 'I'� w,Fy• �+�, St6�3�, Category 4 � � Wetland ,- , 20100609 S ft \ a Frank A.Marcinko r LICENSED DESIGNER I f/f rei 06 !S f' allik Septic Site Plan Name: Freund Tax Parcel: 22331-53-00061 99.36'r ALIJE4 Scale = I" = 50' Address: 201 NE Sundown Dr,Tahuya ,c This is not 8 survey all prapert?lines/boun9aries have been demonstrated by the Owners)and/or their Agent(s). On-Site Septic Design!Allied Septic Design and Excavating v.e,Jan''oat ' Cr'uy CMawren of C3 Mahal on Jury 2.2023.Wetland boundary is constant ove,the previously delineated resr:l'S Washington Home Center www.washhome.com Corporate August 6, 2007 PO Box 176 Chehalis,WA 98532 360.748.6604 Fax:360.748.0588 Phil &Debbie Freund 9790 Ogle Rd#31 Bremerton, WA 98311 Chehalis Sales 1051 NW Louisiana SUBJECT: Wetland Delineation for: 201 Sundown Drive, Tahuya,WA Chehalis,WA 98532 1.800.648.1113 Tax Parcel #: 223315300061 Phone: 360.748.6604 Section/Township/Range: S31-T23N-R2W Fax:360.748.6884 Dear Mr. and Mrs. Freund: On July 25,2007 I reviewed the above subject site and based on my field studies I have found this parcel to HAVE jurisdictional wetlands. This determination was Chehalis Sales/Service conducted for replacement of a mobile home with a new manufactured home in 1951 North National the same footprint as existing home. The wetlands identified are isolated Chehalis,WA 98532 1.800.438.7279 depressions that WILL NOT be impacted by your development. Wetland#1 Phone: 360.748.1825 system is north of your home placement. Wetland#2 system is south of the home Fax:360.748.1032 placement. Both wetland#1 and#2 are classified as a Category 4 in the rating system. These systems have a distinct buffer and boundary area that is well established and continues to be in place. The new home placement will be outside of the buffer and no building setbacks established by Mason County. Shelton Sales Determination Method: SE 61 Ryan Road Routine, Wetland Delineation Manual 1987 , Washington State Wetlands Shelton,WA 98584 ( ) 1.800.490.9424 Identification and Delineation Manual (1997). Phone: 360.427.6667 Fax:360.426.8493 ON-SITE: The site is in the Collins Lake Subdivision#4 Tract 61 created in the mid 1960's. The existing home site was developed with a home and on-site sewage disposal system in 1976. The home and drainfield were placed on an upland section of the property, which is elevated from 25 to 75 feet from distinct isolated depressed Rainier,Oregon Sales areas on both sides. These isolated depressions arc classified as Type 4 regulated 29368 Washington Way wetlands. The project will update the 1976 manufactured home with a new Rainier, 97048 manufactured home. The existing home is 24 X 40 feet. Utilizing the same 1.800.801.3701 Phone:503.556.3701 footprint, a new 27 x 70 foot will be placed. The additional 30-foot in length will Fax:503.556.0424 not be encroaching on the wetlands or their buffers. The wetlands are north and south of the existing home site and the additional length will be placed east of the home. The new home will be 50 feet south of the northern wetlands and 65 feet north of the southern wetland basin. A Stormwater retention system was in place at the time of my inspection. This system has been put in place to protect the AWASOLVEATOTESF Fr SWINE ®cHampion wetlands during the construction phase. The site has been very well maintained with mature vegetation separating the home site from the native wetland sites. Both of these isolated wetlands are shallow basins that exist all over this Tahuya forest area. They have been dissected by county and private roads and have a well-maintained culvert and ditch system since the development of the subdivision. These depressional areas function in Stormwater runoff retention but are too isolated and choked up to have much habitat function. They are surrounded with dense development with small home sites serviced by a public water system and county infrastructure. Both systems on the north and south have surface runoff directed into them but are not connected with an outlet to the lake or any streams in the area. They are surrounded by upland knolls, driveways, ditches,paved road systems, and the above mentioned home sites. Wetland#1 is 50 feet from the closest point of the home placement on the north side of the northwest corner of the new home placement. It goes from Sundown Drive on the west and runs easterly.The basin is approximately 290 feet long by 60 feet in width. Wetland#2 is south of the home and is 65 feet at the closest point of the home. This basin runs parallel along the curved Sundown Lane. This second basin is approximately 190 feet by 45 feet in width. SOILS: The soils classified on site are Alderwood gravelly sandy loam per the USDA soil survey. These soils include areas of Norma silt clay in the depressions noted. The Norma silt clay is a poorly drained soil. The upper horizon was a dark gray silt clay loam. The B horizon was predominately a mottled gray silt clay down to 18 to 20 inches in depth. TEST HOLES: 0- 8 inches very dark black gray with a color of 10 YR 3/1 Mottling exhibited 8-20 inches gay brown mottled silt clay with a color of 2.5Y 5/2 Upland test pits: 0-8 inches dark brown gravelly sandy loam good roots color 1 OYR 2/2 8-20 inches brown gravelly sandy loam to yellow brown color 7.5 YR 3/4 to 1 OYR 5/6 HYDROLOGY: Standing water was noted in some of the depressed areas. The soils were saturated. The waters noted were very only 1 to 3 inches deep in most of the extreme low areas. The hydrology of the area is definitely confined to these shallow depressions and supports the vegetation noted. VEGETATION: The overstory along the upper edges of the depressions were primarily native species of Douglas Fir(pseudotsuga menziesu),western white pine(pinus monticola), with scattered Red Alder(Alnus oregona), and western Red cedar (Thuja plicata). Scattered throughout these trees were Bracken fern(Pteridium aquilinum) and some Vine maple(Acer circinatum). These trees and shrubs end and a sharp drop of 3 to 5 inches goes to the shallow basin covered in a thick growth of hardhack(Spiraea douglasii) and wild rose(Rosa gymnocarpa). The ground surface exhibited some areas of sphagnum moss. CONCLUSION: All three indicators of hydric soils,hydrology, and hydophytic vegetation were present in both depressions. Based on these two areas being isolated and how they function in the topography they are classified as Category 4 Wetlands using the Washington State Wetland Manual. In the scoring of both wetlands they were very low on the habitat area rating. Wetland# 1 is less than ''Y2 acre in size and wetland#2 is less than .02 of an acre. These are regulated by Mason County Ordiance#77-93. Per this ordinance the buffer would be 25 feet and the no build zone would be 15 feet for a total of 40-foot setbacks. Wetland#1 is 50 feet from the new home placement and wetland#2 is 65 feet from the new home placement. MATERIALS USED: • Soil Survey of Lewis County, USDA • Munsell Soil Color Charts 1998 Edition • Plants of the Pacific Northwest Coast, Pojar and Mackinnon 1994 Edition • Washington State Wetlands Identification and Delineation Manual 1997 Edition • US Army Corps of Engineers Wetland Determination Manual Technical Report Y-87-1 (1987 Edition). Sincerel Charles R. Hampton, BS, S, Biologist, Wetland Certified Pictures: 201 Sundown Drive,Tahuya, WA awed . fi o ,4 R i h- �i.`�Sa} J� '`'c , ,j "' :y <J Wetland#1 -Basin f # r f ,e -. As ,t ar , 'to-;,,,,V"$ - (l rS ~..- A. ', `., 4:•- ',I- i •,t.f 4 a b Y ,„ - ... . Wetland#1 —Buffer oil r t y ti� r . ryt �, n ~ a `+_'tvr F! ft 4N + t r tf '' r , 4 Wetland#1 —Hardback basin ", b-ii t f 1 J4.Ti AYE' y n; y �:r OI � -�c4 ram, r�'^V :.4 Fi .. T .g •s ��� t,; , s. Y ` r i fit • •, r ti ,. ,• ,7r ° Wetland#1 — - , m ' i ,.A NW of Home site }i{ , r " •ti �:' ' 5- ' y+ A- } R+ V '?# ,0 , •1 'r J Wetland#1 —Soil erosion • •{ + `r - . . protection ''t '. , ' pio. .''� 1. 441 . . ••',101.; ,,-r Wetlands#1 —NW of 4�+,>tn ' : --,,,.; homesite y� may}:'`. i d ,A f ti c 6. "i _ r ; `�, • ) Wetland#1 —Shrub scrub • i a1 rr�1 S ,A. .. - Wetland#2—SE of home site Wetland#2 SE of home site � ,. \�• ' tidy Wetland#2 South Driveway- adjacent •.„4,s-a0;?.'.',.- - • - taisma.g.h.ftiaarkiitaren ' • 1- t, •,t Wetland#2 ' •4`,"4.qt•-• 1'3 •• ,1 South edge of property t•og • : • -• - • ''00",1! ^ • , • • •. 44 • , .: _.:.....1 . . • . i ,,,... , ci ....- , rz.e.,.. . 1. 4t \.).‘ ., rz.:b_ 1 a �� ,N • P o4rs,.,�� •Y. ;1 \ a x • ....... ) , .• : . v, • x q •-•Z . \..'t.1\ vs/ t, 1-` l •.V kikt • x • +` • t. 1 ' •,.: • a Y' i:aYr - .' \'-• -;et.N....,) 0111‘ ,,, , ' ..---- \ p .rn, ) Y ` Van • N <::::), .54,e141' 7' . -..,,, N .-- ;.: '• 1 .974-9"1:0;#°? ,.0. 1'' ''.'•"). a le'.''')--ilt . • a. • II - C O p' p N a' ai ►-, W C� '-ri LA 0G w Q. 0 0 0 rn )N - SHEET NUMBER 6 R. 3 w, I R. 2 W. > > p • .7•�... yrl s N' '� 4r •>. ' 3' '.' _ a i�r� re"!i�- F. 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' ' 2757ft DISCLAIMER AND LIMITATION OF LIABILITY: The data used to make this map have been tested for accuracy,and every effort has been made to ensure that these data are timely,accurate and reliable.However,Mason County LEGEND makes no guarantee or warranty to its accuracy as to labeling,dimensions,or placement or location of any map features contained herein.The boundaries depicted by these data are Poad i ril Fecterai Land' approximate,and are not necessarily accurate to surveying or engineering standards,and arc intended for informational purposes only.Mason County does not assume any legal liability "/ilICV-hlaYs City of Shelk,n or responsibility arising from the use of this map in a manner not intended by Mason County. . In no event shall Mason County be liable for direct,indirect,incidental,consequential, - RivOrS E Streams 3 Cihr1tYB:undary iONFt) special,or tort damages of any kind,including,but not limited to,loss of anticipated profits lif S or benefits arising from use of or reliance on the information contained herein Par rAI Commissione CAstncts :E4ct1ons Ai. Lakes C 2006-Mason County ,.• — 415 N.Sixth Street r i Terinstitts Sit Pug4t Sound 8 Malty Lakes Shelton,WA 98584 http://mapmason.co.mason.wa.us/servlet/com.esri.esrimap.Esrimap?ServiceName=amason... 7/31/2007 I Wetlands Rating Field Data Form Background Information: Name of Rater , Jo f41 , i j(;'(t6 . Date: 2:4 Name of wetland(if known): Tie 14 nd: e Z Government Jurisdiction of wetland: inS0-n G . Location: 1/4 Section: of 1/4 S: Section: .3) Township: � 3NRange: Sources of Information: (Check all sources that apply) Site visit: V USGS Topo Map: NWI ma p: Aerial Photo: ✓ `Soils survey: t/ Other: Describe: When The Field Data form is complete enter Category here: T Q.1. High Quality Natural Wetland Circle Answers Answer this question if you have adequate information or experience to do so. If not find someone with the expertise to answer the questions. Then,if the answer to questions la, lb and lc are all NO,contact the Natural Heritage program of DNR. la. Human caused disturbances. Is there significant evidence of human-caused changes to topography or hydrology of the wetland as indicated by any of the following conditions? Consider only changes that may have taken place in the last 5 decades. The impacts of changes done earlier have probably been stabilized and the wetland ecosystem will be close to reaching some new equilihriutn that may represent a high quality wetland. lal. Upstream watershed> 12%impervious. - 1a2. Wetland is ditched and water flow is not obstructed. : go to Q.2 1a3. Wetland has been graded, filled,logged. � go to Q.2 1 a4. Water in wetland is controlled by dikes, weirs, etc. .go to Q.2 lay. Wetland is grazed. . go to Q.2 es 1a6. Other� indicators of disturbance(list below . go to Q.2 Q.2 ,p6f� `' ' U � F t3r'!0 r1 '1'?� ?-!'ti &jilt W4y No:goo to lb. 25 • lb Are there populations of non-native plants which are currentl cover more than 10%of the wetland,and appear to be invadingY present, YES: t t I populations? Briefly describe any native o. -o.to c: non-native plant populations and Information source(s): lc. Is there evidence of human-caused disturbances which have visibly to ikalO o ss .2 degraded water quality. Evidence of the degradation of water qualityg Q include: direct(untreated)runoff from roads or parking lots; presence, NO:contacte Cat. I or historic evidence,of waste dumps;oily sheens;the smell of organic contact DNR chemi Is;or lifestock use. Briefly describe: � -% s e•c,A /s. sew GQi Q.2. Irreplaceable Ecological Functions: Does the wetland: ,,,��, ® have at least 1/4 acre of organic soils deeper than 16 inches labo all:go to Q.3) and the wetland is relatively undisturbed;OR YES go to 2a [IIf the answer is NO because the wetland is disturbed briefly describe: Indicaattors of disturbance may include: Wetland has been graded, filled'logged* (.- Organic soils on the surface are led- ut for more than half of the year; Wetland receives direet's rmwat rom _ urban or agricultural areas.), - OR e have a forested class greater than I acre; OR YES:Go to 2b ® have characteristics of an estuarine system; OR YES:Go to 2c ® have eel grass,floating or non-floating kelp beds? YES:Go told 2a. Bogs and Fens Are any of the three following conditions met for the area of organic soil? 2a.1. Are Sphagnum mosses a common ground cover(>30%) and the cover of invasive species(see Table 3)is less than 10%? Is the area of sphagnum mosses and deep Is the area of sphagnum mosses and deep organic soils 1/4-1/2 acre? YES: Category I YES: Category II NO: Go to 2a.3 2a.2. Is there an area of organic soil which has an emergent class with at least one species from Table 2,and cover of invasive species is< 10% (see Table 3)'. Is the area of herbaceous plants and deep organic soils> 1/2 acre? YES: I Is the area of herbaceous plants and deep organic soils 1/4-1/2 acre? YES: Categgory II Y NO: Go to 2a.3 26 2a.3. Is the vegetation a mixture of only herbaceous plants and Sphagnum mosses with no scrub/shrub or forested classes? Is the area of herbaceous plants,Sphagnum, and deep organic soils> 1/2 acre? Is the area of herbaceous plants,Sphagnum, and deep organic YES: Category 1 soils 1/4-1/2 acre? YES: Category II • NO: Go to Q.3. Q.2b. Mature forested wetland. 2b.1. Does 50%of the cover of upper forest canopy consist of evergreen YES: Category I trees older than 80 years or deciduous trees older than 50 years? NO: Go to 2b.2 Note:The size of trees is often not a measure of age, and size cannot be used as a surrogate for age(see guidance). 2b.2. Does SO%of the cover of forest canopy consist of evergreen trees older YES:Go to 2h.3 than 50 years, AND is the structural diversity of the forest high as NO: Go to Q.3 characterized by an additional layer of trees 20'-49'tall,shrubs 6'-20', tall,and a herbaceous groundcover? 2b.3. Does <25%of the areal cover in the herhaceous/groundcover or YES:Category I the shrub layer consist of invasive/exotic plant species from the list on p. 19? NO: Go to Q.3 Q.2c. Estuarine wetlands. 2c1. Is the wetland listed as National Wildlife Refuge, National Park, National Estuary Reserve,Natural Area Preserve,State Park,or N GoC to 2c.2 I NO: Go to Educational,Environmental or Scientific Reserves designated under 2c.2 WAC 332-30-1519 2c.2. Is the wetland>5 acres; Note: If an area contains patches of salt tolerant vegetation that are YES: Category I 1)less than 600 feet apart and that are separated by mudilats that go dry on a Mean Low Tide,or 2)separated by tidal channels that are less than 10()feet wide; all the vegetated areas are to be considered together in calculating the wetland area. or is the wetland 1-5 acres; YES: Go to 2c.3 or is the wetland < I acre? YES: Go to 2c.4 27 2c.3. Does the wetland meet at least 3 of the following 4 criteria:. . YES:Category I g rY NO:Category II -minimum existing evidence of human related disturbance such as diking,ditching, filling,cultivation,grazing or the presence of non- • native plant species(see guidance for definition); -surface water connection with tidal saltwater or tidal freshwater; -at least 75%of the wetland has a 100'buffer of ungrazed pasture, • open water,shrub or forest; -has at least 3 of the following features: low marsh;high marsh;tidal channels; lagoon(s);woody debris; or contiguous freshwater wetland. 2c.4. Does the wetland meet all of the four criteria under 2c3. ?.above . ( ). YES:Category II NO:Category III Q.2d. Eel Grass and Kelp Beds. 2d.1. Are eel grass beds present? YES:Category I NO:go to 2d.2 2d.2. Are there floating or non-floating kelp bed(s)present with greater than YES:Category I 50%macro algal cover in the month of August or September NO: Category II Q.3, Category IV wetlands. 3a. Is the wetland: less than 1 acre Da hydrologically isolated and, comprised of one vegetated class that is dominated(>80% areal cover) Y Category IV by one species from Table 3(page 19)or Table 4(page 20 NO:go to 3b 3b. Is the wetland:less than two acres and,hydrologically isolated, with one vegetated class,and>90%of areal cover is any combination of Y species from Table 3 (page 19) ` Category IV :go to 3c 3c.Is the wetland excavated from upland and a pond smaller than 1 acre < ' i ategory IV without a surface water connection to streams, lakes, rivers,or other wetland,and has<0.1 acre of vegetation. NO:go to Q.4 • 28 Q.4. Significant habitat value. Answer all questions and enter data requested. 4a. Total wetland area Circle scores that qualify MIMS Estimate area,select from choices in the near right column, and score in the >cre 200 far column: 40- 200 5 Enter acreage of wetland here: a,V acres, and source: .S�}pF►nWil er 10-00 4 5 - 10 3 1 -5 2- 0.1 <0.1 0 4b. Wetland classes: Circle the wetland classes below that qualify: Open Water: if the area of open water is> 1/4 acre Aquatic Beds: if the area of aquatic beds > 1/4 acre, Emergent: if the area of emergent class is> 1/4 acre, #of classes Points Scrub-Shrub: if the area of scrub-sub class is> 1/4 acre, 1 in- c.) . . . . p Forested: 'f area of forested class is>.1/4 acre, 4 8 Add the number of wetland classes, above, that qualify,and then 5 10 score according to the columns at right. e.g. If there are 4 classes(aquatic beds,open water,emergent & scrub-shrub), you would circle 8 points in the far right column. 4c. Plant species diversity. For each wetland class(at right)that qualifies in Class 4b above,count the number of different plant species Aquatic Bed 1 0 #species in clasp Pt�ints you can find that cover more than 5%of the ground. 2 1 You do not have to name them. 1 3 2 > 3 3 Score in column at far right: e.g. If a wetland has an aquatic bed class with 3 species, Emergent 1 0 an emergent class with 4 species and a scrub-shrub 2-3 1 class with 2 species you would circle 2,2, and 1 in the 4-5 2 far column. >5 3 Note:Any plant species with a cover of>5% qualifies for points within a class,even those Scrub-Shrub 1 that are not of that class. 0' (Lfi 3-4 2 >4 3 Forested 1 0 2 1 3-4 Ci' >4 3 29 4d. Structural diversity. If the wetland has a forested class,add 1 point if each of the following classes is present within the forested class and is larger t t14 -trees>50'tall han acre: �`� -trees 20'-49'tall YES` -1� -shrubs YES W -herbaceous ground cover YES-0 Also add 1 point if there is any"open water"or"aquatic bed"class YES 1 immediately next to the forested area(ie.there is no scrub/shrub or emergent vegetation between them). YES - l 4e. Decide from the diagrams below whether interspersion between wetland classes is high,moderate,low or none? If you think the High-5 amount of interspersion falls in between the diagrams score accordingly Ooderate-3 (i.e.a moderately high amount of insterspersion would score a 4, nee while a moderately low amount would score a 2) None-0 / 1 ; r c none low • low • . . . ;;), , N. ...,.....,n'vim ).> r�\ •::}',��s sa .<,Y '♦i`i ♦ i / / '`I♦ moderate moderate high 4f. Habitat features. Answer questions below,circle features that apply, and score to right: Is there evidence that the open or standing water was caused by beavers Is a heron rookery located within 300'? YES = 2 Are raptor nests located within 300'? YES= 1 Are there at least 3 standing dead trees(snags YES= 1 b )per acre 10" in diameter at"breast height"(DBH)?, greater than Are there at least 3 downed logs per acre with a diameter YES= 1 > 6" for at least 10'in length? Are there areas(vegetated or unvegetated) within the wetland that are YES= I ponded for at least 4 months out of the year,and the wetland has not qualified as having an open water class in Question 4b. ? OYES=2� 30 4g. Connection to streams. (Score one answer only.) 4g.1. Does the wetland provide habitat for fish at any time of the year AND does it have a perennial surface water connection to a fish hearing stream. YES=6 4g.2 Does the wetland provide fish habitat seasonally AND does it have a seasonal surface water connection to a fish hearing stream. YES=4 4g.3 Does the wetland function to export organic matter through a surface water connection at all times of the year to a perennial stream. YES=4 4g.4 Does the wetland function to export organic matter through a surface water connection to a stream on a seasonal basis? YES=2 4h.Buffers. Score the existing buffers on a scale of 1-5 based on the following four descriptions. If the condition of the buffers do not exactly match the description,score either a point higher or lower depending on whether the buffers are less or more degraded. Forest,scrub, native grassland or open water buffers are present for more than 100'around 95%of the circumference. Score=5 Forest,scrub, native grassland,or open water buffers wider than 1(X)' for more than 1/2 of the wetland circumference,or a forest,scrub, grasslands,or open water buffers for more than 50' around 95%of the circumference. Score= 3 Forest,scrub, native grassland,or open water buffers wider than 100' for more than 1/4 of the wetland circumference,or a forest,scrub, native grassland,or open water buffers wider than 50'for more than 1/2 of the wetland circumference. Score=2 No roads,buildings or paved areas within 1(0'of the wetland for more than 95%of the wetland circumference. Score=2 No roads,buildings or paved areas within 25'of the wetland tier more than 95%of the circumference,or No roads buildings or paved areas within 50'of the wetland for more than 1/2 of the wetland circumference. Score= 1 Paved areas,industrial areas or residential construction (with less than 50' between houses) arc less than 25 feet from the wetland tier more than 95% of the circumference of the wetland. Score=0 31 Wetland Cate.o 125 feet - - I I 85 feet III 50 feet IV 25 feet Ve.etation Area 15'Buildin. Setback b. Special Setbacks-Measured from the wetland edge . (1) On-site sewage disposal drainfield- 100 feet(30.5m) (125 feet for Category I) (2) Livestock feedlot-200 feet(70 m) 3. Increased Wetland Vegetation Area Width The Administrator shall require increased standard vegetation area widths on a case-by-case basis when a larger vegetation area is necessary to protect wetland functions and values based on local conditions. This determination shall be supported by appropriate documentation showing that it is reasonably related to protection of the functions and values of the regulated wetland. Such determination shall be attached as a permit condition and shall demonstrate that: a. A larger vegetation area is necessary to maintain viable populations or critical habitat of threatened or endangered species living within the subject wetland(s)boundaries; or b. The adjacent land is susceptible to severe erosion and erosion control measures will not effectively prevent adverse wetland impacts;or c. If the wetland contains variations in sensitivity,increasing the vegetation area widths will only be done when necessary to preserve the structure, function and value of the wetland. 4. Wetland Vegetation Area Width Averaging The boundary of the vegetation area may be modified by averaging vegetation area widths. If vegetation area averaging is used, the following conditions must be met: a. The total area contained in the vegetation area after averaging shall be no less than that contained within the vegetation area prior to averaging; and Mason County Resource Ordinance 25 Revised February 28,2006