HomeMy WebLinkAboutWetland Determination - PLN General - 3/26/1998 THE COOT C014PA
�Y
Wetland and Wildlife Consulting Services
26 March 1998 110 S. Vla h""gi""
DRAFmpia.
I OI�� WA 9tt>01
Dan Holman (360) 352-989-
Island West FAX (360) 35,2-9x)( 1
P.O. Box 2379
Shelton, WA 98584
RE: Wetland Determination at Lot 4 of Stonebriar Development, Mason County,
WA
Dear Mr. Holman: 1
Per your request, we conducted a site review of Lot 4 for wetland conditions on 24 March
1998. The following is a summary of our findings;.a map and technical data are attached.
OVERVIEW
Lot 4 of the Stonebriar sub-division was inspected for wetland conditions. The lot is ,1.9
acres in size and currently undeveloped. A Stop Work order was issued when recent filling
and grading activities occurred in a questionable wetland area. The Coot Company
inspected the lot and adjacent ground for wetland conditions. Although seasonal stormwater
flooding occurs, the seasonal inundation does not persist for the duration required for
jurisdictional wetland criteria. This lot is situated within a regionally significant stormwater
drainage swale.
METHODS
Delineation
Wetland determination followed a Routine Methodology based upon the Washington State
Wetland Identification and Delineation Manual (1997) requiring positive indicators for
wetland soil, hydrology, and plants.
Reconnaissance Area
All land within a 100-foot radius of Lot 4 filling and clearing was inspected for wetland
conditions.
RESULTS
Prominent Stormwater Swale (See Aerial Photo)
A large, prominent stormwater swale system crosses directly through Lot 4 roughly NNW
to SSE. This system can be identified on aerial photos, and appears to extend several
thousand feet to the north. Local residents report that large volumes of water can
accumulate after prolonged heavy rains with surface waters reportedly overtopping Jensen
Road during the heavy rains of last winter. However, this stormwater hydrology is short
term and can drain away in a matter of days if rainfall does not persist. Our field review
found drift marks up to 18 inches deep in the lowest points of the swale from recent heavy
rains, yet no water could be found either at the surface or within 18 inch deep soil pits.
A
Non-Wetland Condition (See Data Sheets & map)
f Initial habitat appearance indicates a wetland condition due to the depressional topography,
standing water drift marks and Facultative-dominated plant community. However, detailed
inspection found very marginal hydric soil conditions and no water within 18 inches of the
soil surface. The lack of wetland hydrology is the most telling feature indicating a non-
wetland condition. Given the time of year (late March), and that rainfall of over 1/2 inch
occurred in the 24 hours prior to our site visit, the absence of even groundwater within 18
inches of the surface strongly indicates that technical wetland hydrology does not persist
for the required duration.
RECOMMENDATIONS
Remove Some Fill I
Due to the stormwater detention functions within the low swale system on this property, we
highly recommend removing those newly filled portions that may encroach on this detention
area.
Relocate Access Road
The current access point to this lot occurs very near to the swale low point. Shifting access
further west along Jensen Road could avoid future flooding problems during high water
conditions.
We hope this information is adequate for your needs at this time. If you have any
questions, or we may be of further assistance, please call our office at 352-9897.
Sincerely,
DRArl or
Steve Shanewise, PWS
Senior Ecologist
Attachment:
-Aerial photo
- Site map
- Data sheets '
jensMR98.let
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■/■ = Culvert COOT CjommTUE NT
=Direction of flow Welland and wildlife e1010t
416 S. Washington
1" _`200'
Olympia, WA 98501
Approximately 1"=200' STONBRIAR- LOT 4
WETLAND RECONNAISSANCE MAP
S32,T21N,R3W
_ March 1998
NOTE:All locations
approximate
DATA FORM 1OUT-PIT SOILS ROUTINE ONSITE DETERMINATION METHOD Map Unit Name: Grove gravelly loam Drainage C�:X
(WA State Wetland Delineation or 1987 Corps Wetland Delineation Manual (Series&Phase) excessively
Project/Site:Jensen Rd./Stonebriar ) Taxonomy(subgroup):--
Date: 24 Mar 98 Field observations confirm mapped type? Unconfirmed
Applicant/Owner: Dan Holman County: Mason
State: WA Profile Description Field Investigator(s):M.Bennett S/T/R: S32,T21N,R3W Depth Horizon Matrix color Mottle colors
Mottle abundance Texture/ Drawing of soil
Do Normal Circumstances exist at the site?Yes Community ID: 1-OUT East (inches) (Mansell) (Hansen) size contrast structure,etc. profile(match
Is the site significantly disturbed? No Transect ID: 0-2 O description)
Is the area a potential Problem Area? No Plot ID: Duff/organic matter
Explanation of atypical or problem area: 2-7 A 10 YR 2/1
VEGETATION
Dominant Plant Species Indicator Stratum 8-18 B 10 YR 2/3
1.Spiraea douglash FACW S -
2,F
.R osa pisocarpa FACU S S3. Rhamnus purshiana FAC S Hydric Soil Indicators
4.Pinus contorta FAC- T
5.Salix scouleriana Histosol: Concretions:
FAC T Histic Epipedon: High Organic Content: X
Sulfidic Odor Organic Streaking
HYDROPHYTIC VEGETATION INDICATORS: Aquic Moisture Regime Listed on Local List
Percent of dominant species that are OBL,FACW,and/or FAC: 80% ReducingConditions
Listed on National List
4dicators that apply: Gleyed or Low-Chroma Other:
Regional knowledge of plant communities:X Wetland plant list: X Hydric soils present?No
Physiological/reproductive adaptations: Morphological adaptations: Rationale for decision/Remarks: 3 chroma,no mottles at 12"
Technical Literature: Wetland plant Data Base:
Other:
Hydrophytic vegetation present? Yes WETLAND DETEMTNATIO
Rationale/Remarks: Dominant spp.FAC Hydric vegetation present? Yes
HYDROLOGY Hydric Soils present? No
Wetland Hydrology present?No Is Sampling Point within a wetland?No
Is it the growing season?: Yes Water Marks:No Sediment Deposits:No Rationale/Remarks:FAC-dominated plant community not supported by hydric soils
Based on: Drift lines: Yes Drainage patterns: Yes or wetland hydrology.
Depth of inundation: none Oxidized Root Local Soil Survey:No
Channels< 12":No NOTES: Seasonal flooding does not persist for the duration required for wetland
Depth to free water in pit: absent FAC Neutral:No Water-stained leaves: Yes hydrology.
Depth to saturated soil: none
Stream, lake, or gauge data: Other: Seasonal flooding confirmed by
Aerial photographs: neighbors
Wetland hydrology present? No
Rationale/Remarks: Seasonal flooding does not persist for the duration required for wetland hydrology
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' (ISLAND WEST SHORT PLAT #
Assoc.) AIR
ED 3 . 12 ` 3
— — —S 88 55'41" E 309.80— — OF COMMUNITY
✓ - - - - - - - - _ —,- -- I DEVELOPMENT
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LOT 1 1 DALE &FOANDREA
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- — — - S 88'55'41" E - — — — I SW 114, NW 114,
— --310.54----- �o
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LOT 2 I o� SEC. 32, TWN. 21N. , R. 3W. , W.M.
7401 FAIRVIEW RD. SW #2
I . 00 AC. I g I OLYMPIA, WA. 98502
0 ' \ I I PARCEL32 f 3223000 10
321323200000
*35!1/ - -- - S 8855'41" E� — I to i LEGEND.
I - -- - - 311.28 -- -- - -I w I =#5 IRON BAR & PLASTIC
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2. 10AC. to I
(-15' DRAINAGE I AND UTILITY THE PROPOSED LOCATION OF
ESMT.(TYPICAL) I �' I WELLS AND 100 ' RADIUS ARE
�,P I I ADVISORY ONLY. WEL L S I TE
_ 697s3 A� y I I APPLICATION & SEPTIC SITE
INSPECTION MUST BE APPLIED
CL�1 20;39'160 FOR PRIOR TO BUILDING PERMIT,
31 \' `r R=240.00 I 50' EASEMENT FOR
CALC. 25 ' GREEN emu• L=86.57 INGRESS, EGRESS,
AREA ESMT. �'��� DRAINAGE, AND UTILITIES.
SINGLE
PROP`/ 32 LOT 4 j� i I (PR I VA TE)AF555115
/ 1 . 90 AC. NOTE:\ I I SEE BOUNDARY LINE
I 1 ti 6957, , I ADJUSTMENT #92-98
41 RJ AS RECORDED UNDER
AF #555115 RECORDS
OF MASON COUNTY, WA.
x , C2 �,. LINE TABLE
/ a= 35'11 25 NO. BEAR ING D I STANCE
R=240.00 L 1 S 5520'25" W 55.79
`— L= 147.40 L2 N 75 58 '51" E 51 .37
U 15 ' UTILITY / / L3 N 59752'09" E 75.09
? 25 EASEMENT / �1 /r R=30 y� L 4 N 53'21 '17" E 59.37
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SCALE. 1"=100" o
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WARNING: MASON COUNTY HAS NO 92154SP4
RESPONSIBILITY TO BUILD, IMPROVE,
MAINTAIN, OR OTHERWISE SERVICI- HOLMAN & ASSOCIATES
THE PRIVATE ROADS CONTAINED PROFESSIONAL LAND SURVEYORS
WITHIN, OR PROVIDING ACCESS TO 2323 N. ADAMS, SHELTON, WA,
THE LAND DESCRIBED IN THIS SHORT (206)426-2990 98584
PLAT.
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