HomeMy WebLinkAboutWetland Delineation & mit 977700081
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WESTECH COMPANY
Environmental Consulting - Site Permitting
WETLAND DELINEATION AND MITIGATION REPORT
PARCEL 977700081, MARROWSTONE ISLAND
JEFFERSON COUNTY, WASHINGTON
March 2005
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G. Bradford Shea, Ph.D.
Submitted to:
,
U. S. ARMY CORPS OF ENGINEERS
SEATTLE DISTRICT
REGULATORY BRANCH
Post Office Box 3755
Seattle, Washington 98124-2255
Submitted by:
WESTECH COMPANY
Post Office Box 2876
Port Angeles, Washington 98362
P.O. Box 2876 - Port Angeles, Washington 98362 - Telephone: (360) 585-1333 - Fax: (360) 452-6708
emall: bshea@tenforward.com
WETLAND DELINEATION AND MITIGATION REPORT
PARCEL 977700081, MARROWSTONE ISLAND
JEFFERSON COUNTY, WASHINGTON
March 2005
G. Bradford Shea, Ph.D.
Submitted to:
U. S. ARMY CORPS OF ENGINEERS
SEATTLE DISTRICT
REGULATORY BRANCH
Post Office Box 3755
Seattle, Washington 98124-2255
Submitted by:
WESTECH COMPANY
Post Office Box 2876
Port Angeles, Washington 98362
CONTENTS
, CHAPTER/SECTION
PAGE NO.
1.0 INTRODUCTION
1
2.0 METHODS
5
3.0 WETlAND DELINEATION RESULTS
3.1 Existing Conditions
3.2 Description of Wetlands
3.3 Land Uses and Habitat Values
3.4 Wetland Types and Buffers
7
7
10
10
10
4.0 WETlAND MITIGATION PLAN
4.1 Proposed Wetland Crossing
4.2 Design and Construction
4.3 Revegetation and Maintenance
4.4 Wetland Mitigation and Measures
12
12
12
14
16
5.0 CONCLUSIONS AND RECOMMENDATIONS
5.1 Conclusions
5.2 Recommendations
17
17
17
6.0 REFERENCES
7.0 TABLES
Table 1. Upland and Wetland Vegetation
Table 2. Site Soils
19
22
23
8.0 CERTIFICATION
24
FIGURES
Figure 1. Vicinity Map 2
Figure 2. Site Map 3
Figure 3. Preliminary Jurisdictional Determination 8
Figure 4. Wetland Delineation Map Showing Proposed Driveway
and Eastem Homesite 13
Figure 5.. Proposed Driveway Details 15
Figure 6. Watershed Map of Isolated Wetland System Connected
to the On-Site Wetland 18
APPENDICES
Appendix A - Site Photographs 26
Appendix B - Wetland Data Forms 29
Vl/lJV878ACOE. TOC/0331 OS/mas
1.0 INTRODUCTION
The property described as Parcel 977700081, (Volume 2 of Surveys, Page 117) located
on Olson and Hambleton's extension in Jefferson County, Washington is a 4.7 acre
parcel of land owned by Patricia Britt and Gwendolyn Moore. The property is located in
the SE quarter of Section 4 of Township 29 North, Range 1 East (Figures 1, 2).
The owners contracted with Westech Company (Westech) to delineate the on-site
wetlands. Due to poor soil conditions on the western portion of the site, it has been
necessary to define a homesite on the eastern side of the parcel which can be pennitted
under Jefferson County regulations for a single family residence and drainfield. Since this
location would require crossing of a drainage area which feeds the on-site wetland, a
Mitigation Plan was fonnulated and included as an additional section within the Wetland
Delineation Report (Section 4.0).
A potential purchaser (Mike Zimmennan and Hope Borsato) have submitted a JARPA
pennit application to the U.S. Army Corps of Engineers on January 10, 2005. The Corps
assigned this application Reference # 200500123. This report constitutes a revised and
expanded Wetland Delineation and Mitigation Plan to meet Corps requirements.
Summarv of Site Conditions and Historv
The property (2nd lot north of Renier Road) located on East Marrowstone Road on
Marrowstone Island was checked for critical areas by Westech and found to contain one
wetland. The landowners Patricia Britt and Gwendolyn Moore contracted with Westech to
delineate this wetland and determine wetland type and buffer zones. Section 3.0 of this
report contains results of the delineation.
The initial Wetland Delineation focused on the westem portion of the property and
assumed a house-site within the northwestern forested area. Additional work was
requested by the owners to document conditions and wetland extent on the eastem
portion of the property. Unless easements could be procured, the only on-site access to
this portion of the property is across a 40-50 foot wide strip of wetland.
. A Mitigation Plan has been prepared to offset impacts to wetlands from access to the
eastern portion of the property as per Jefferson County Regulations (Sections 3.6.9 and
3.6.10 of the Unifonn Development Code). That Mitigation Plan is described in Section
4.0 of this report. The Mitigation Plan includes mitigation of hydrological impacts, impacts
to soils and impacts to vegetation and wetland habitat.
WW878ACOE.RPT/033105/mas
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Field Investiaations
, Surveying has not been recently conducted on the property and most boundary lines
were not readily evident in the field. Parcel maps, aerial photographs and other maps
were provided by the Jefferson County website and by Mr. Terry McHugh of Coldwell
Banker Realty. Design studies and maps for septic approval have not yet been prepared
for the parcel.
Field investigation ,of wetlands was conducted by Dr. G. Bradford Shea with assistance by
Mr. Jason Anderson during August and early September 2004. Additional research
regarding mitigation on the potential wetland crossing area and on the eastem wetland
boundary were performed during November 2004 by Dr. Shea and Mr. Luke Gauthier.
Dr. Shea and Westech staff have conducted additional investigations of the on-site
wetland and surrounding wetland areas during the period February through March 2005
in order to establish conditions related to U.S. Army Corps of Engineers jurisdictional and
permit requirements.
WW878ACOE.RPT/033105/mas
4
2.0 METHODS
Methods used to delineate wetlands were those recommended by the U.S. Army Corps
of Engineers for Routine On-Site Field Method of Delineation of Wetlands (U.S. ACOE
1987). Field methods recommended in the Washinaton State Wetlands Identification and
Delineation Manual (DOE 1997) were also applied. Wetland rating was accomplished
according to the Guidelines of the Washinaton State Wetlands Ratina System (Westem
Washinatonl (DOE 1993). Guidelines and requirements of the Jefferson County Critical
Areas Code were applied as applicable (Unified Development Code, Section 3, Land Use
Districts 2001).
Veaetation
Wetland plants were primarily identified in the field, with subsequent collection and keying
when necessary. Plants were identified using the following sources:
Cooke 1997
Guard 1995
Pojar and Mackinnon 1994
Hitchcock and Cronquist 1973
Lyons 1997
Taylor 1995
Keying of plants using magnifying lenses and dissecting microscope was used as
necessary. Detennination of wetland indicator status utilized regional keys published by
U.S. Fish and Wildlife Service (U.S. FWS 1988).
Soils
Soils were detennined through field examination. Soils were dug or augured to depths of
up to 18 inches or more using a wetland shovel, a 24 inch soil probe and a standard
augur. Soil consistency was detennined by feeling for grain size and texture. Soil
moisture was detennined at that time. In the event of saturated conditions in the hole,
depth to standing water was noted. Soil color was determined through comparison of
field samples with standard Munsell Color Charts (Munsell 1994). Soil was also
examined for presence of mottles, gley and other indicators of anaerobic soil oxidation.
Hvdroloav
Hydrologic conClitions were detennined through examination of topographic relief and
drainage patterns. Soil moistness was detennined by hand as indicated above and in the
event of standing water; depth to standing water was noted.
'!'fW878ACOE.RPT/033105/mas
5
Field Surveys
Initial field surveys were carried out by Dr. Shea and Mr. Anderson during August and
September 2004. These surveys included identification of plants, wetland habitats, soils
and hydrology. Additional studies were perfonned by Dr. Shea and Westech staff during
November 2004, and the period February - March 2005.
Rationale for Detenninina Wetland Boundaries
Wetlands were detennined based on the Routine On-Site Field Method used by
Washington Department of Ecology and the U.S. Anny Corps of Engineers. Wetlands
were determined by a combination of vegetation, soil and hydrology indicators. Specific
transect and quadrat points were sampled along apparent wetland edges. Various points
were sampled for vegetation, soil and hydrology in order to detennine wetland
boundaries. Appendix B contains wetland maps and data fonns for one typical sample
point from each of the delineated wetlands.
Wetlands were staked in the field by 24 inch wooden stakes. Wetland boundaries in
forested areas were indicated by use of 'Wetland Delineation Boundary" flagging tape
placed at appropriate points in trees and shrubs. All boundaries were staked and/or
flagged every 20-25 feet. Wetland buffer zones were detennined based on field
measurements and regulatory requirements and were staked in the field and marked with
orange and black striped flagging every 40-50 feet.
WW878ACOE.RPT/033105/mas
6
3.0 WETLAND DEUNEATION RESULTS
3.1 Existina Conditions
The Site is located on nearly level to gently sloping land. Elevation is roughly 100 feet
above mean sea level (msl). There is one wetland on the Site (Figure 3). This wetland
can be categorized as a Category III wetland according to the DOE classification system,
due to its relatively small size (Jess than 20 acres) and the apparent absence of any
special features. The wetland includes a shrub-scrub area which is generally located to
the south and a forested area along a drainage corridor which enters the property from
the north. The wetland does provide reasonable good habitat for mammals, birds,
reptiles and amphibians due to the combination of forest and shrub-scrub habitat and the
rural nature of the surrounding environment.
, Vegetation
The Site vegetation is a mixture of upland forest, forested wetland and shrub-scrub
wetland. The upland forest is dominated by Douglas fir, western hemlock, red alder and
bitter cherry. Forest shrubs include red elderberry, oceanspray, Oregon grape, stinging
nettle, trailing blackberry, swordfem, salal, and red huckleberry (Table 1).
Vegetation in the forested wetland includes an overstory of westem red cedar, and red
alder, underlain by a groundcover of water hemlock, soft rush and slough sedge. The
shrub-scrub wetland is somewhat more diverse including soft rush, salmonberry, Nootka
rose, slough sedge, Douglas spirea, pacific willow, and cattail (see Table 1).
The forested upland and wetland areas cover the northwestem and eastem portions of
the Site. The shrub-scrub wetland covers the southwestern portion of the Site.
Soils
Soils on the Site are of the Whidbey-Dick soil series (SCS 1975). These are generally
well-drained to somewhat excessively drained steep soils. These soils are very gravelly
and are underlain by compact glacial till or loamy sand. The specific soil types at the Site
are:
1) Aanew-Silt Loam lAa-B) ~ percent slopes. This soil is generally nearly level to
gently sloping and is generally adjacent to ocean bluffs or in valley area formerly
occupied' by shallow glacial till. Included in this soil are small areas of moderately
coarse textured, gravelly soils that formed in glacial till and outwash. This soil is
generally somewhat poorly drained and permeability is moderately slow. This soil
holds 10 or more inches of water available for plants. Runoff is generally slow and
the hazard for water erosion is slight. The seasonal water table is 1-2 feet.
WwS78ACOE.RPT/033105/mas
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2) Casey Silt Loam lCe-B} 0-8 percent slopes. This soil is nearly level to gently
sloping soils on terraces. This soil is generally found near marine bluffs at
elevation of less than 300 feet These soils are brown to grey-brown silt loams
overlying grey clay and grey-brown loamy fine sand. Included in this soil are small
areas of generally moderately welkfrained to somewhat excessively drained soils.
This soil type is somewhat poorly drained and permeability is generally slow. This
soil holds 8-10 inches of water available for plants. Runoff is slow and the hazard
of water erosion in slight. The seasonal water table is 1-2 feet
3) Semiahmoo Muck lSh) This soil is located on nearly level soils in basins. It is
generally composed of black clay muck and peat This soil is generally poorly
drained and permeability is moderate. It holds more than 10 inches of water for
plants. Runoff is generally very slow or ponded and the hazard of erosion is
generally slight or non-existent
The wetland soils appear to be composed of silt and clay loams consistent with the Casey
and Semiahmoo series as mapped by SCS. Upland soils are sandy silt loams overlying
hard packed glacial till consistent with the Agnew series soils.
Hvdroloav
Hydrology of the Site is that of a lowlying isolated wetland depression. The wetland is fed
by stormwater runoff from surrounding properties (from the north and east). Groundwater
inflow is relatively minor due to the absence of a significant size drainage basin to the
north.
There is no apparent outflow channel from the on-site wetland, although there is a
connector to the wetland on the west side of East Marrowstone Road in the form of a 24
inch culvert. Local landowners have indicated that there may be a blocked or partially
blocked culvert extending under Renier Road and leading to drainage to the south.
A field reconnaissance was conducted by Dr. Shea of the area to the south of Renier
Road. Observations indicate that a wetland drainageway leads south past Merry Road
but ends to the north of Moen Road. A test plot of vegetation, soils and hydrology
conducted on the north side of Moen Road (see VHS - 5 in Appendix B) indicates that
this is an area of lowIying upland forest and is not a wetland area (also see photographs
in Appendix A). Therefore. the wetland system to the south which may connect to the on-
site wetland can be considered to be isolated, with no direct surface water connection to
Waters of the United States.
WW878ACOE.RPT/03310S/mas
9
3.2 Description of Wetlands
, There is one wetland which occupies about half the property (roughly 2.5 acres). The
wetland occupies the north central portion and the southwestem portions of the property.
Upland areas are found in the northwestem and the eastem portions of the property. The
eastem area is currently accessible from the main road only through the wetland or buffer
zone. The wetland is forested in the northem portion and shrub-scrub in the southem
portion. The wetland extends off-site to the south and appears to also occupy nearly half
of the property to the south.
The vegetation of this wetland is typical of a second growth alder-cedar forested wetland
in the north and a spirea dominated shrub-scrub wetland in the south. Wetland soils
range from a silty-peaty soil in the shrub-scrub area to a clayey silt loam in the forested
area. Hydrology is nearly dry in the summer months, with overall hydrology generally
following stormwater pattems. The wetland probably has standing water over most of its
area during winter and spring.
3.3 Land Uses and Habitat Values
The Site is currently an undeveloped property zoned for residential development. The
Site contains a shrub-scrub wetland area to the south, and a forested wetland in the
north-central area, north of the shrub-scrub wetland, Upland forest is found in the
northwestern and eastern portions of the Site (see Figure 3).
The wetland on the site appears to provide habitat for small mammals and birds. Larger
mammals including mule deer are likely present. A review of Washington Department of
Fish and Wildlife Priority Habitats and Species Maps indicates that no threatened,
endangered or sensitive species are mapped at or within 0.5 miles of the project site.
Bald eagles, a species undergoing delisting from threatened status do use the area near
Nodule Point, located roughly 0.6 miles east-northeast of the project Site.
The wetlands are somewhat seasonal in terms of saturation and generally do not contain
standing water except during winter and spring months. This may limit wildlife habitat
value during dry time periods.
3.4 Wetland Tvpes and Buffers
The wetland on the Site appears to qualify as a Category III wetland under Washington
Department of Ecology rating guidelines currently used by Jefferson County (see
Appendix B). The wetland is moderately diverse and contains mostly native species,
although the shrub-scrub wetland is dominated by spirea, an invasive species which
tends to crowd out other native species (Pojar and MacKinnon 1997). The forested
wetland is dominated mainly by red alder and westem red cedar (see Table 1).
VVW878ACOE. RPT/0331 05/mas
10
The wetland size and location is shown in Figure 3. The wetland is above the regulatory
threshold in size and would therefore be considered a regulatory wetland according to
' Section 3.6.9 of the Jefferson County Code. A 50 foot buffer is required for development
of a single family residence and flagging indicating that size buffer zone has been placed
along the on-site borders of this Class III wetland.
Within the northern forested wetland area, the wetland is relatively narrow. Here, the
wetland apparently is the result of drainage from the property to the north. The wetland
varies from 40-50 feet in width in this area. The owners have proposed that a graveled
driveway be placed across this narrow area to provide access to the eastem upland
portion of the parcel for a residential site. The potential effects of that work within the
wetland and mitigation measures to offset the project are described in Section 4.0.
WW878ACOE.RPT/033105/mas
11
4.0 WETLAND MITIGATION PLAN
4.1 Proposed Wetland Crossina
The property owners have proposed that the homesite be located on the eastern portion
of the property within the upland forest. There appears to be adequate space at this
location for a homesite and soil characteristics may be better for the drainfleld (McHugh
2004, personal communication). The only on-site access for this location, however,
would require a driveway to pass through the wetland. This crossing will be offset as
described below through:
1) Maintenance of hydrologic connection through use of a 18 inch minimum culvert
beneath the driveway crossing
2) Establishment of all necessary means to assure protection of the wetland from
erosion both during and following construction of the driveway
3) Replanting of driveway shoulders with appropriate native plants
4) Offset impacts of the driveway fill by establishing and creating a new wetland area
approximately 1600 feet in size (2:1 ratio) immediately adjacent to the existing
wetland north of the proposed driveway. These impacts and mitigations will be
carried out as discussed in detail in the following sections of this report.
The owners have proposed that a graveled driveway be constructed across the wetland
at a point located approximately 100 feet south of the northem property line (see Figure
4). This driveway would pass through about 50 feet of wetland and through 50 feet of
buffer zone both east and west of the wetland. Construction would involve placement of
fill matenal (gravel) across the wetland and associated buffer zones. The sections below
discuss mitigation measures necessary to offset placement of the driveway within the
wetland and buffer zone.
4.2 Deskm and Construction
The primary consideration in protecting the integrity of the forested wetland is to protect
the hydrologic connection between drainage from the north and the wetland to the south.
This can be accomplished by placement of one or more culverts at or near the lowest
point of the driveway crossing. Such culverting should accommodate a 50 year storm
event (as per DOE 2001 requirements) and be in conformance with applicable
requirements of the Jefferson County Code. That code recommends an 18 inch culvert
as a minimum for road crossings. This size should minimize maintenance.
WW878ACOE.RPT/033105/mas
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Since the wetland soils are compressible, it will be necessary either to place additional
, gravel or to remove wetland soils prior to placement of fill. If soil is removed, it should not
be placed within wetland or buffer areas. Areas outside the driveway footprint should not
be disturbed by grading or other soil moving operations.
The driveway width should be 12 feet or less, plus necessary sideslopes (sideslopes not
to exceed a two foot footprint each). Total footprint of the driveway and sideslopes should
thus be no more than 16 feet (this footprint should be staked in the field prior to
construction and equipment operators should be instructed not to deposit materials or to
operate machinery outside of this footprint within the wetland or buffer zone). The height
of fill should be less than three feet above the current grade. Sideslopes should conform
to standard engineering practices and Jefferson County Code requirements.
Figure 4 shows a potential wetland crossing, located where the least wetland impact will
occur (the wetland is only about 50 feet in width at a point 100 feet south of the northern
property boundary as shown in Figure 4.) Figure 5 shows a plan-view close-up and a
cross section of this potential driveway crossing. This crossing would result in
approximately 800 square feet offill material (0.02 acres) being placed in the wetland.
A silt fence should be constructed at the edge of the footprint, prior to driveway
construction in order to limit erosion into the wetland during construction. Any graded
areas should be reseeded with native plants (grasses, etc.) prior to completion of
construction. Construction should be limited to the period April through October to limit
erosion. Any construction during the winter season should incorporate additional erosion
control measures as necessary to prevent erosion of soils and sediments into the
wetland.
4.3 Reveaetation and Maintenance
The driveway itself and sideslopes will be made of compacted fill material and will thus
not be suitable for revegetation. Driveway sideslopes should be covered with 4-6 inches
of native topsoil and revegetated with native grasses as shown in Figure 5. Any other
areas disturbed by construction should be revegetated immediately upon completion of
construction with native plants. Any such plantings should be compatible with the local
soil conditions. No wetland vegetation should be disturbed outside of the 16 foot wide
footprint.
The culvert should be maintained annually to ensure that water flows freely from north to
south. This may require periodic removal of leaves, brush or other material from the
culvert. Maintenance of the driveway should be performed as needed. Maintenance
gravels should be compacted to limit erosion into the wetland.
WW878ACOE. RPT/0331 OS/mas
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4.4 Wetland Mitiaation Measures
Wetland mitigation measures include measures to assure hydrology and limit erosion as
listed above. Replanting of driveway shoulders will both stabilize those soils and limit
siltation and erosion effects in the wetland. In order to compensate for filling of a 16'x50'
foot section of wetland, the applicants will create an additional wetland area on the west
side of the existing forested wetland, immediately north of the proposed driveway (see
Figure 4). This will be achieved through:
1) Grading a portion of the present buffer zone (approximately 32' x 50' for a 2:1
ratio) down to 6 inches below the current base level of the wetland
2) Importing organic silt and/or clay soils and covering the area to six inch depth
(level with the current wetland surface)
3) Replanting the newly created wetland area with selected transplanted native
plants derived from the on-site wetland or from nearby properties.
Transplanted plants should be taken from scattered locations so as to not
adversely affect existing wetland vegetation. Plants used should include mainly
alder, cedar and willow (1-2 gallon size, or 2-3 feet in height - total of about 20
trees), based on an altemating pattem on 10 foot centers. Groundcover plants
(approximately 50) should be placed in conformance with existing distributions
in the adjacent wetland.
The new plantings should be emplaced during fall, winter or early spring time
period. If plantings occur during later spring or summer, the plants should be
watered at least weekly during the first dry season. The plantings should be
approved by a biologist or native-plant qualified nursery-person. Mortality
should be limited to 20 percent over the first two years, and new plants should
be planted as necessary to assure this limit.
4) Erosion control measures as listed above for the road crossing should also be
established along the edge of the newly created wetland area (silt fencing
along edge of driveway which crosses the buffer zone). Hydrology should be
monitored to ensure that newly planted wetland plants receive sufficient water.
Implementation of these measures will result in minimization of impacts from the road
crossing. It will also offset impacts from wetland filling through creating a, new wetland
area (at a 2:1 ratio) immediately adjacent to the existing wetland, with adequate soils and
hydrology to allow the new wetland area to function properly while preserving habitat and
other natural values.
WW878ACOE.RPTl033105/mas
16
5.0 CONCLUSIONS AND RECOMMENDATIONS
, 5.1 Conclusions
One wetland was found on the property. This included a forested area and a shrub-scrub
area within the wetland. This wetland was found to be greater than 10,000 square feet in
size and the wetland appears to be nearly isolated from other nearby wetlands by road
benns 10-12 feet in height.
The wetland does connect with a wetland to the west via a culvert under East
Marrowstone Road and may connect via a blocked or partially blocked culvert to wetlands
south of Renier Road, however, these wetlands appear to grade to uplands between
Merry Road and Moen Road and therefore do not appear to be directly connected to
Waters of the United States (Figure 6). Buffer zones of 50 feet have been mapped
around the wetland for the proposed residence as per Jefferson County regulations
(Jefferson County 2001).
Without an easement from an off-site owner, the eastem portion of the property cannot
be developed without access across the wetland. Confonnance to the requirements of
Section 4.0 of this report will result in adequate mitigation to assure no significant net
impact on the wetland. Impacts will be offset through ensuring hydrologic connection by
use of a 18 inch minimum culvert, minimization of erosion effects, replanting driveway
shoulders and by creation of a new wetland area (at a 2:1 ratio) adjacent to the existing
wetland immediately north of the proposed driveway.
5;2 Recommendations
Figure 3 shows mapped locations of regulatory wetlands found on the Site.
Recommended 50 foot buffer zones along the northem side of the wetland have also
been shown on Figure 3. Figures 5 and 6 and the text of Section 4.0 indicates the
Mitigation Plan which will offset impacts to the wetland. No structures, grading,
excavating, filling, draining or other activities which may adversely affect the wetlands
may be carried out in the wetland or in the buffer zones (with the exception of the wetland
creation proposed in Section 4.0 of this report) as per Section 3.6.9 of the Unified
Development Code.
We recommend that a silt fence be placed between the areas to be graded and the
wetland area prior to initiating construction. Hay bales, jute netting and other erosion
control devices should be used as necessary during construction to keep silt and
sediment out of. the wetland. Graded areas should be reseeded as quickly as possible
with native grasses.
Construction of the driveway crossing, if pennitted by Jefferson County, should be carried
out as per the provisions of Section 4.0 of this report. Figures 4 and 5 show the locations
for a minimum impact crossing point and Sections 4.1-4.3 include provisions for design,
construction, revegetation and maintenance associated with this crossing.
WW878ACOE. RPT/0331 05/mas
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6.0 REFERENCES
Coldwell Banker. 2004. Personal communication with Terry McHugh. Port Angeles,
Washington. '
Cooke, 5.5. 1997. A Field Guide to the Common Wetland Plants of Westem
Washinaton and Northwestem Oreaon. Seattle Audubon Society. Seattle,
Washington.
Guard, J. 1995. Wetland Plants of Washinaton and Oreaon. Lone Pine Publishing.
Renton, Washington.
Hitchcock, C.L. and A. Cronquist. 1973. Flora of the Pacific Northwest. University of
Washington Press. Seattle, Washington.
Jefferson County. 2001. Jefferson County Unified Develooment Code. Section 3, Land
Use Districts, Subsection 3.6 - Wetlands. Department of Community
Development. Port Townsend, Washington.
Lyons, C.P. 1997. Wildflowers of Washinaton. Lone Pine Publishing. Renton,
Washington.
Munsell Color. 1994. Munsell Soil Color Charts. Gretag Macbeth. New Windsor, New
York.
Po jar, J. and A. MacKinnon. 1994. Plants of the Pacific Northwest Coast. Lone Pine
Publishing Company. Redmond, Washington.
Taylor, R. 1995. Northwest Weeds. Mountain Press Publishing Company. Missoula
Montana.
U.S. Army Corps of Engineers (ACOE). 1987.
Delineatina Jurisdictional Wetlands.
Washington, D.C.
U.S. Fish and Wildlife Service (FWS). 1988. National List of Soecies that Occur in
Wetlands: Reaion 9 (and Suoolement). Biological Report 88(26.9). Portland,
Oregon.
Federal Manual for Identifvina and
U.S. Govemment Printing Office.
U.S. Geological Survey. 1953. Quadrangle Map of Nordland, Washington. 1:24,000
Scale. Published 1953, Photorevised 1973. Boulder, Colorado.
U.S. Soil Conservation Service (SCS). 1975. Soil Survev of Jefferson County Area.
Washinaton. U.S. Department of Agriculture. Washington, D.C.
WW878ACOE.RPT/033105lmas
19
Washington Department of Ecology (WDOE). 1993. Washinaton State Wetlands Rating
SYStem: Western Washinaton. Second Edition. Publication # 93-74. Olympia,
Washington.
Washington Department of Ecology (WDOE). 1997. Washinaton State Wetlands
Identification and Delineation Manual. Publication #96-94. Olympia, Washington.
Washington Department of Fish and Wildlife (WDFW). 2005. Unpublished maps of
Priority Habitats and Species. Section 4, T29N, R1E. Olympia, Washington.
WW878ACOE.RPT1033105lmas
20
7.0 TABLES
WW878ACOE.RPT/033105lmas
21
TABLE 1. UPLAND AND WETLAND VEGETATION
Common Name Scientific Name ' Indicator"
Upland Forest
Douglas fir Pseudotsuga menziesii FACU
Western hemlock Tsuga heterophy/la FACU
Red alder Alnus rubra FAC
Bitter cherry Prunus emarginata FACU
Red elderberry Sambucus racemosa FACU
Oceanspray Holodiscus discolor UPL
Oregon grape Mahonia neNosa FACU
Stinging nettle Urtica dioica FACU
Trailing blackberry Rubus ursinus FACU
Swordfern Polystichum munitum FACU
Salal Gaultheria sha/lon FACU
Red huckleberry Vaccinium paNifolium FACU
Forested Wetland
Western red cedar Thuja plicata FAC
Red alder Alnus rubra FAC
Western water hemlock Cicuta douglasii OBL
Water parsley Oenanthe sannentosa OBL
Soft rush Juncus effuses FACW
Slough sedge Carex obnupta OBL
Training blackberry Rubus ursinus FACU
Salmonberry Rubus spectabilis FAC+
Horsetail Equisetum aNense FAC
Shrub-5crub Wetland
Soft rush Juncus effuses FACW
Salmonberry Rubus spectabilis FAC+
Nootka rose Rosa nutkana FAC
Slough sedge Carex obnupta OBL
Douglas spirea Spirea douglassi FACW
Pacific willow Saliz lucida FACW+
Cattail Thpha latfolia OBL
"Indicators: UPL = Upland plant, FACU= Facultative Upland Plant (more upland than
wetland), FAC = Facultative (borderline wetland plant), FACW = Facultative
Wetland Plant (prefers wetland conditions), OBL = Obligate (only found in
wetlands).
WW878ACOE.RPT/033105lmas
22
TABLE 2. SITE SOILS
Veaetation ~ Color Value/Chroma
Uoland forest These soils were lighter grey-brown 3/4 (10YR)
grey-brown sandy-gravelly
Ioams. These soils were
deep and somewhat well
drained over grey silty clay.
Forested wetland sandy silt loam over glacial dark grey-brown 3/2 (10YR)
till
This soil is a gravelly silt-
loam over hard packed
glacial till and outwash at
10-12 inches. Value varies
between 3/1 and 3/2.
Shrub-scrub wetland peaty-silt loam over glacial dark brown 3/2 (10YR)
glacial wetland till
This soil is a highly
organic dark-brown to
black soil over glacial
till at 6-12 inches depth.
Some mottles were
observed.
*Value/Chroma readings are from comparison of field samples with Munsell Soil Color
Charts
WW878ACOE.RPT/03310S/mas
23
8.0 CERTIFICATION
I, the undersigned, certify that the information contained in this Wetland Delineation and
Mitigation Plan Report for the property located on East Marrowstone Road, Assessor's
Parcel Number 977700081 in Jefferson County, Washington is true and correct to the
best of my knowledge and professional judgment. The project has been performed by
myself and other staff and associates of Westech Company.
P29~~
Dr. G. Bradford 5 , Principal
3-.3/ -0.;.....
Date
WW878ACOE.RPTl033105lmas
24
APPENDICES
WW878ACOE. RPT/0331 05lmas
25
WW878ACOE.RPTl033105lmas
APPENDIX A
SITE PHOTOGRAPHS
26
1. Forested wetland area
2. Shrub-scrub wetland area
WW878ACOE.RPT/0331051mas
27
3. Forested upland with wetland in background
4. Proposed driveway crossing across wetland
WW878ACOE.RPT/033105lmas
28
VVVV878ACOE.RPT/033105/mas
APPENDIX B
WETLAND DATA FORMS
29
DATA FORM
ROUTINE WETLAND DETERMNATION
(1987 COE Wetlands Delineation Manual)
'roject/Site Marrowstone Island - Assessor Parcel # 97nOO081 Date: October 1, 2004
Applicant I Owner: PatJicia Britt and Gwendolyn Moore County: Jefferson
Investigator: Dr. G. Bradford Shea I Westech Company State: Washington
Do Nonnal Circumstances exist on the site? . NO Community 10: Wetland
Is the site significantly disturbed (Atypical Situation)? YES E Transect 10:
Is the area a potential Problem Area? (If needed, explain on reverse) YES II Plot ID: VSH-1
VEGETATION
Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator
I Salmonberry S-50% FAC+ 9
(Rubusspectabilis)
2 Oceanspray S-20% FACU 10
(Holodiscus discolor)
3 Trailing blackberry S-20% FACU 11
(Rubus ursinus)
4 Buttercup S-IO% FACW+ 12
(Ranunculus repens)
5 13
6 14
7 15
8 16
'ercent of Dominant Species that are OBL, FACW, or FAC (excluding FAC-) 60%
Remarks Predominance of wetland vegetation (greater than 50%)
HYDROLOGY
WETLAND HYDROLOGY INDICATORS
D Recorded Data (Describe in Remarks) Primary Indicators:
D Inundated
D Stream, Lake or Tide Gauge o Saturated in Upper 12 Inches
0 Aerial Photographs D Water Marks
0 Other D Drift Lines
o Sediment Deposits
0 No Recorded Data Available o Drainage Patterns in Wetlands
FIELD OBSERVATIONS
Depth of Surface Water (in) Secondary Indicators (2 or more Required):
D Oxidized Root Channels in Upper 12 Inches
Depth to Free Water in pit (in) o Water-Stained Leaves
o Local Soil Survey Data
D F AC-Neutra1 Test
Depth to Saturated Soil 3-6 (in) D Other (Explain in Remarks)
,
DATA FORM- ROUTINE WETLAND DETERMINATION
Page 1
SOILS
Map Unit Name (Series and Phase): Whidbey Dick Soil Series Drainage Class: B-C
I Taxonomy (Subgroup) Agnew Silt Loam! Casey Field Observations Confirm Mapped Type? .NO
Silt Loam and Semiahmoo Muck
PROFILE DESCRIPTION
Matrix Color Mottle Colors Mottle Texture,
Depth (Inches) Horizon {Munsell (Munsell Moist) Abundance/Contrast Concretions,
Moist) Structure, etc.
0-6 A Greylbrown Silt loam
4/1 (IOYR)
6-12 B Grey/brown Clayey silty
4/2 (lOYR) loam
12+ C Silty sandy
loam
HYDRIC SOIL INDICATORS
0 Histosol o Concretions
0 Histic Epipedon o High Organic Content in Surface Layer in Sandy Soils
o Sulfidic Odor o Organic Streaking in Sandy Soils
0' Aquic Moisture Regime 0' Listed on Local Hydric Soils List
0' Reducing Conditions o Listed on National Hydric Soils List
0' Gleyed or Low-Chroma Colors o Other (Explain in Remarks)
Remarks:
Some gley - soils silty
WETLAND DETERMINATION
Hydrophytic Vegetation Present? 1m NO
Wetland Hydrology Present? - NO Is this Sampling Point Within a Wetland? . NO
- ,
Hydric Soils Present? NO ,
Remarks:
,
All parameter condition met, although soils slightly lighter in color than normal.
DATA FORM- ROUTINE WETLAND DETERMINATION
Page 2
DATA FORM
ROUTINE WETLAND DETERMNATION
(1987 COE Wetlands Delineation Manual)
, "rojectlSile Marrowstone Island - Assessor Parcel # 977700081 Dale: October 1, 2004
Applicant I Owner: Patricia Britt and Gwendolyn Moore County: Jefferson
Investigator: Dr. G. Bradford Shea I Westech Company State: Washington
Do Normal Circumstances exist on the site? m NO Community 10: Upland
Is the site significantly disturbed (Atypical Situation)? YES . Transect 10:
Is the area a potential Problem Area? (If needed, explain on reverse) YES III Plot 10: VSH-2
VEGETATION
Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator
1 Douglas fir C-50% FACU 9 Indian plum S-5% FACU
(Pseudotsuga menziesii) (Oemleria cerasiformis)
2 Red alder C-20% FAC 10
(Alnus rubra)
3 Western Hemlock C-IO% FACU- 11
(Tsui(a heterophyIla)
4 Grand fir C-IO% F ACU- 12
(Abies grand is)
5 Salal S-30% FACU 13
(Gaultheria shaIlon)
6 Swordfern S-30% FACU 14
(Polystichum munitum)
'7 Nootka rose S- 10% FAC 15
(Rosa nutkana)
8 Trailing blackberry S-15% FACU 16
(Rubus ursinus)
Percent of Dominant Species that are OBL, FACW, or FAC (excluding FAC-) 20"10 canopy 10% shrub
Remarks: Over 50% upland species
HYDROLOGY
WETLAND HYDROLOGY INDICATORS
o Recorded Data (Describe in Remarks) Primary Indicators:
o Inundated
0 Stream, Lake or Tide Gauge o Saturated in Upper 12 Inches
0 Aerial Photographs o Water Marks
0 Other o Drift Lines ,
o Sediment Deposits
o No Recorded Data Available o Drainage Patterns in Wetlands
FIELD OBSERVATIONS
Depth of Surface Water (in) Secondary Indicators (2 or more Required):
0 Oxidized Root Channels in Upper 12 Inches
Depth to Free Water in Pit (in) o Water-Stained Leaves
, o Local Soil Survey Data
o FAC-Neutral Test
I Llepth to Saturated Soil None found (in) o Other (Explain in Remarks)
DATA FORM- ROUTINE WETLAND DETERMINATION
Page I
SOilS
Map Unit Name (Series and Phase): Whidbey Dick Soil Series Drainage Class: B
Taxonomy (Subgroup) Agnew Silt Loam! Casey Field Observations Confirm Mapped Type? !II NO
Silt Loam and Semiahmoo Muck
PROFILE DESCRIPTION
Matrix Color Mottle Colors Mottle Texture, Concretions,
Depth (Inches) Horizon (Munsell Moist) (Munsell Moist) Abundancel Structure, etc.
Contrast
0-6" A Greylbrown Gravelly silt loam
513 (lOYR)
6-12" B Light brown Silty sandy gravel
5/3 (lOYR)
12-18" C Light greyl brown Rocky solid till
6/3 (lOYR)
HYDRIC SOIL INDICATORS
D Histosol D Concretions
D Histic Epipedon D High Organic Content in Surface Layer in Sandy Soils
D Sulfidic Odor D Organic Streaking in Sandy Soils
D Aquic Moisture Regime D Listed on Local Hydric Soils List
D Reducing Conditions D Listed on National Hydric Soils List
D Gleyed or Low-Chroma Colors D Other (Explain in Remarks)
Remarks:
Shallow gravelly silty loam over glacial till.
WETLAND DETERMINATION
Hydrophytic Vegetation Present? YES NO
Wetland Hydrology Present? YES NO Is this Sampling Point Within a Wetland? YES NO
,
Hydric Soils Present? YES NO
Remarks: ,
Dry moderately drained soils over glacial till.
DATA FORM- ROUTINE WETLAND DETERMINATION
Page 2
DATA FORM
ROUTINE WETLAND DETERMNATION
(1987 COE Wetlands Delineation Manual)
CrojecUSite Marrowstone Island - Assessor Parcel # 977700081 Date: March 11, 2005
Applicant I Owner: Patricia Britt and Gwendolyn Moore County: Jefferson
Investigator: Dr. G. Bradford Shea I Westech Company State: Washington
Do Normal Circumstances exist on the s~e? - NO Community 10: Wetland
Is the s~e significantly disturbed (Atypical Situation)? YES II Transect 10: Near Proposed Crossing
Is the area a potential Problem Area? (If needed, explain on reverse) YES II Plot 10: VSH-3
VEGETATION
Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator
I Western red cedar C-40% FAC 9 Salmonberry S-10% FAC+
(Thuia plicata) . (Rubus svectabilis)
2 Red alder C-40% FAC 10
(Alnus rubra)
3 Pacific crab apple C-20% FACW 11
(Malusfusca)
4 Lyngby sedge H-30% OBL 12
(Carex lynj(byei)
5 Water hemlock H-20% FAC 13
(Cicuta doufdasii)
6 Swordfern H-IO% FACU 14
(Polvstichum munitum)
7 Stinging nettle H-20% FAC+ 15
(Urtica doica)
Percent of Dominant Species that are OBL, FACW, or FAC (excluding FAC-) 90"10
Remarks: Dominant vegetation in wetland plants.
HYDROLOGY
WETLAND HYDROLOGY INDICATORS
o Recorded Data (Describe in Remarks) Primary Indicators:
o Inundated
0 Stream, Lake or Tide Gauge o Saturated in Upper 12 Inches
o Aerial Photographs Ii'! Water Marks
o Other o Drift Lines
o Sediment Deposits
0' No Recorded Data Available Ii'! Drainage Patterns in Wetlands ,
FIELD OBSERVATIONS
Depth of Surface Water (in) Secondary Indicators (2 or more Required):
0 Oxidized Root Channels in Upper 12 Inches
Depth to Free Water in Pit 0-2 (in) o Water-Stained Leaves
Ii'! Local Soil Survey Data
o FAC-Neutral Test
Depth to Saturated Soil 0 (in) o Other (Explain in Remarks)
DATA FORM- ROUTINE WETLAND DETERMINATION
Page I
SOILS
I \iap Unit Name (Series and Phase): Whidbey Dick Soil Series Drainage Class: B-C
- axonomy (Subgroup) Agnew Silt Loam! Casey Field Observations Confirm Mapped Type? .. NO
Silt Loam and Semiahmoo Muck
PROFILE DESCRIPTION
Matrix Color Mottle Colors Mottle Texture,
Depth (Inches) Horizon (Munsell (Munsell Moist) Abundance/Contrast Concretions,
Moist) Structure, etc.
0-6 A 3/1 (IOYR) Silty clay loam
6-12 B 4/1 (IOYR) Crumbly sandy
gravelly silt
loam
12-18 C 5/2 (lOYR) Sandy silt
I
HYDRIC SOIL INDICATORS
0 Histosol 0 Concretions
0 Histic Epipedon 0 High Organic Content in Surface Layer in Sandy Soils
o Sulfidic Odor 0 Organic Streaking in Sandy Soils
0' Aquic Moisture Regime 0' Listed on Local Hydric Soils List
0' Reducing Conditions 0 Listed on National Hydric Soils List
0' Gleyed or Low-Chroma Colors 0 Other (Explain in Remarks)
Remarks:
Underlying till beneath silts and silt loams.
WETLAND DETERMINATION
Hydrophytic Vegetation Present? ~ NO
Wetland Hydrology Present? !tS~ NO Is this Sampling Point Within a Wetland? . NO,
Hydric Soils Present? . NO
Remarks:
All criteria met, although underlying till is light in color.
I
DATA FORM- ROUTINE WETLAND DETERMINATION
Page 2
DATA FORM
ROUTINE WETLAND DETERMNATION
(1987 COE Wetlands Delineation Manual)
'rojectJSite Marrowstone Island - Assessor Parcel # 977700081
Applicant I OWner: Patricia Britt and Gwendolyn Moore
Investigator: Dr. G. Bradford Shea I Westech Company
Do Normal Circumslances exist on the site? NO
Is the site significantly disturbed (Atypical Situation)? YES 1'1
Is the area a potential Problem Area? (If needed. explain on reverse) YES 11m
Date: March 11, 2004
County: Jefferson
State: Washington
Community 10: Upland
Transect 10: Near Proposed Crossing
Plot 10: VSH-4
VEGETATION
Dominant Piant Species Stratwn Indicator Dominant Plant Species Stratwn Indicator
1 Douglas fir C- 20"10 FACU 9
(Pseudotsu~a menziesii) ,
2 Red alder C-70% FAC-NI 10
(Alnus rubra)
3 Western red cedar C-I0% F AC-NI 11
4 Swordfern S-60% FACU 12
(Polvstichum munitum)
5 Trailing blackberry S-5% FACU 13
(Rubus ursinus)
6 Stinging nettle S-30% FAC+ 14
(Urtica doica)
7 Colonial bentgrass S-5% FAC 15
(Awostis cavillaries)
8 16
Percent of Dominant Species that are OBL, FACW, or FAC (excluding FAC-) 35% shrub layer, canopy alders
are no a good indicator species in this area of regrowing forest.
Remarks: Mixed forest with moist soils.
HYDROLOGY
WETLAND HYDROLOGY INDICATORS
o Recorded Data (Describe in Remarks) Primary Indicators:
o Inundated
0 Stream, Lake or Tide Gauge o Saturated in Upper 12 Inches
0 Aerial Photographs o Water Marks
0 Other o Drift Lines
o Sediment Deposits ,
0 No Recorded Data Available o Drainage Patterns in Wetlands
FIELD OBSERVATIONS
Depth of Surface Water (in) Secondary Indicators (2 or more Required):
0 Oxidized Root Channels in Upper 12 Inches
Depth to Free Water in Pint (in) o Water-Stained Leaves
o Local Soil Survey Data
o FAC-Neutral Test
Depth to Saturated Soil None (in) o Other (Explain in Remarks)
DATA Fl;>RM- ROUTINE WETLAND DETERMINATION
Page I
SOilS
Map Unit Name (Seiies and Phase): Whidbey Dick Soil Series Drainage Class: B
Taxonomy (Subgroup) Agnew Silt Loam! Casey Field Observations Confirm Mapped Type? RENO
Silt Loam and Semiabmoo Muck
PROFILE DESCRIPTION
Matrix Color Mottle Colors Mottle Texture, Concretions,
Depth (Inches) Horizon Abundance!
(Munsell Moist) (Munsell Moist) Contrast Structure, etc.
0-4" A Forest duff
4-10" B Med. Dark Brown Silty loam
5/4 (lOYR)
10-16" C Med. Dark Brown Sandy gravelly loam
5/4 (lOYR)
,
HYDRIC SOIL INDICATORS
0 Histosol 0 Concretions
0 Histic Epipedon 0 High Organic Content in Surface Layer in Sandy Soils
0 Sulfidic Odor 0 Organic Streaking in Sandy Soils
0 Aquic Moisture Regime 0 Listed on Local Hydric Soils List
0 Reducing Conditions o Listed on National Hydric Soils List
0 Gleyed or Low-Chroma Colors o Other (Explain in Remarks)
Remarks:
Dry, light color soils over glacial till.
WETLAND DETERMINATION
Hydrophytic Vegetation Present? YES 1'1
Wetland Hydrology Present? YES 1m Is this Sampling Point Within a Wetland? YES m
Hydric Soils Present? YES IQ
Remarks: ,
No significant wetland characteristics.
.
DATA FORM- ROUTINE WETLAND DETERMINATION
Page 2
DATAFORM
ROUTINE WETLAND DETERMNATION
(1987 COE Wetlands Delineation Manual)
'roject/Site Marrowstone Island - North side of 170 Moen Roan (off-site) Date: September 6, 2004
Applicant I Owner. Patricia Britt and Gwendolyn Moore County: Jefferson
Investigator: Dr. G. Bradford Shea I Westech Company State: Washington
Do Normal Circumstances exist on the site? E NO Community 10: Wetland
Is the site significantly disturbed (Atypical Situation)? YES . Transect 10: Moen Road
Is the area a potential Problem Area? (If needed, explain on reverse) YES III Plot 10: VSH-5
VEGETATION
Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator
1 Douglas fir C-30% UPL 9
(PseudotsuJ?a heterovhv/la)
2 Red alder C-10% FAC 10
(Alnus rubra)
3 Stinging nettle H-15% FAC+ 11
(Urtica doica)
4 Salmonberry S-15% FAC+ 12
(Rubus spectabilis)
5 Snowberry S-10% FACU 13
(Symphoricarpos albus)
6 Red elderberry S-15% FACU 14
(Sambucus racemosa)
Buttercup S-5% FACW+ 15
(RanW1culus revens)
8 16
Percent of Dominant Species that are OBL, FACW, or FAC (excluding FAC-) 45%
Remarks: Less than 50% wetland species.
HYDROLOGY
WETLAND HYDROLOGY INDICATORS
o Recorded Data (Describe in Remarks) Primary Indicators:
o Inundated
0 Stream, Lake or Tide Gauge o Saturated in Upper 12 Inches
0 Aerial Photographs o Water Marks
I 0 Other o Drift Lines
o Sediment Deposits .
o No Recorded Data Available o Drainage Patterns in WetlandS
FIELD OBSERVATIONS
Depth of Surface Water None (in) Secondary Indicators (2 or more Required):
0 Oxidized Root Channels in Upper 12 Inches
Depth to Free Water in Pint None in root o Water-Stained Leaves
zone (in) o Local Soil Survey Data
o F AC-Neutral Test
.epth to Saturated Soil None (in) o Other (Explain in Remarks)
I ,
DATA FQRM- ROUTINE WETLAND DETERMINATION
Pagel
C;OILS
..1ap Unit Name (Series and Phase): Whidbey Dick Soil Series Drainage Class: B
Taxonomy (Subgroup) Agnew Silt Loam! Casey Field Observations Confirm Mapped Type? _NO
Silt Loam and Semiahmoo Muck
PROFILE DESCRIPTION
Matrix Color Mottle Colors Mottle Texture,
Depth (Inches) Horizon (Munsell (Munsell Moist) Abundance/Contrast Concretions,
Moist) Structure, etc.
0-6 A 3/4 (lOYR) Sandy loam
6-12 B 3/3 (lOYR) Sandy loam
12+ C 3/3 (ll} YR) Silty sandy
loam
HYDRIC SOIL INDICA TORS
0 Histosol 0 Concretions
0 Histic Epipedon 0 High Organic Content in Surface Layer in Sandy Soils
0 Sulfidic Odor 0 Organic Streaking in Sandy Soils
0 Aquic Moisture Regime 0 Listed on Local Hydric Soils List
0 Reducing Conditions 0 Listed on National Hydric Soils List
0 Gleyed or Low-Chroma Colors 0 Other (Explain in Remarks)
Remarks:
Moderately drained, medium chroma sandy soils.
WETLAND DETERMINATION
Hydrophytic Vegetation Present? YES ii2
Wetland Hydrology Present? YES E> Is this Sampling Point Within a Wetland? YES ~,
Hydric Soils Present? YES Eli
Remarks: .
The area is part of a damp forest, but is not part of a regulatory wetland. Readings were taken along the lowest
point adjacent to Moen Road.
DATA FORM- ROUTINE WETLAND DETERMINATION
Page 2
Wetlands Rating Field Data Form
Background Information:
Name of Rater: G. Bradford Shea Affiliation: Westech Company Date: September 6, 2004
Name of wetland (if known):
Government Jurisdiction of wetland: Jefferson County
Location: 1/4 Section: SE of 1/4 S: _ Section: 4 Township:29N_ Range: IE
Sources of Information: (Check all sources that apply)
Site visit: X USGS Topo Map: X NWI map:_ Aerial Photo: X Soils survey: X
Other: Describe:
When The Field Data form is complete enter Category here:
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 Ia, Ib and Ic 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 equilibrium that may represent
a high quality wetland. Yes: go to Q.2
la.1 Upstream watershed> 12% impervious. Yes: go to Q.2
la2. Wetland is ditched and water flow is not obstructed. Yes: go to Q.2
1 a3. Wetland has been graded, filled, 1iIR. BlgotoQ.2
la4. Water in wetland is controlled by dikes, weirs, etc. Yes: go to Q.2
laS. Wetland is grazed. Yes: go to Q.2
la6. Other indicators of disturbance (list below) No: go to lb.
,
YES: go to Q.2
I b Are thet<l populations of non-native plants which are currently present, No: go to Ic.
cover
more than 10% of the wetland, and appear to be invading native populations?
Briefly describe any non-native plant populations and
Information source(s): '
lc. Is there eviaence of human -caused disturbances which have visibly YES: go to Q.2
degraded water quality. Evidence of the degradation of water quality include: NO: Possible Cat I
direct (untreated) runoff from roads or parlcing lots; presence, or historic Contact DNR
evidence, of waste dumps; oily sheens; the smell of organic chemicals; or
livestock use. Briefly describe:
1
Q.2. Irreplaceable Ecological Functions:
Does the wetland:
· have at least 114 acre of organic soils deeper than 16 inches
and the wetland is relatively undisturbed; OR
[If the answer is NO because the wetland is disturbed briefly
describe:
Indicators of disturbance may include:
- Wetland has been graded, filled, _;
- Organic soils on the surface are dried-out for more than half
of the year;
- Wetland receives direct stormwater runoff from urban or
agricultural areas.];
OR
· have a forested class greater than I acre;
OR
· have characteristics of an estuarine system;
OR
· have eel grass floating or non-floating kelp beds?
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 organic soils> 112 acre?
Is the area of sphagnum mosses and deep organic soils >'.-1/2 acre?
2a2. 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 < 10010
(see Table 3)?
Is the area of herbaceous plants and deep organic soils> 112 acre?
Is the area of herbaceous plants and deep organic soils 1/4-112acre?
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
soils >'.-112 acre?
Q.2b. Mature ~orested wetland.
2b. I. Does 50"10 of the cover of upper forest canopy consist of evergreen
trees older than 80 years or deciduous trees older than 50 years?
Note: The size of trees is often not a measure of age, and size cannot
be used as a surrogate for age (see guidance).
,
2
(NO to all: go to Q3)
.got02a
YES: Go to 2b
Yes: Go to 2c
Yes: Go to 2d
YES: Category I
YES: Category n
~: Go to 2a3
YES: Category I
YES: Category n
~: Go to 2a3
YES: Category I
YES: Category n
~: Go to Q3.
YES: Category I
NO: Go to 2b.2
2b.2. Does 50% of the cover of forest canopy consist of evergreen trees older
than 50 years, AND is the structural diversity of the forest high as
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 herbaceouslgroundcover or
the shrub layer consist of invasive/exotic plant species from the list on p. 19?
Q.2c. Estuarine wetlands.
2c.1. Is the wetland listed as National Wildlife Refuge, National Park,
National Estuary Reserve, Natural Area Preserve, State Park, or
Educational, Environmental or Scientific Reserves designated under
WAC 332-30-151?
2c.2. Is the wetland> 5 acres; ........................................ .................
Note: If an area contains patches of salt tolerant vegetation that are
1) less than 600 feet apart and that are separated by mudflats that go
dry on a Mean Low Tide, or
2) separated by tidal channels that are less than 100 feet wide;
all the vegetated areas are to be considered together in calculating the
wetland area.
or is the wetland 1-5 acres; ......... .......................................... ......
or is the wetland < I acre? ...... ..................... ...............................
2c.3. Does the wetland meet at least 3 of the following 4 criteria: .......
- minimum existing evidence of hmnan 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 pastore,
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.
2cA. Does the wetland meet all of the four criteria under2c3? (above)?
Q.2d, Eel Grass and Kelp Beds.
2d.1. Are eelgras~ beds present? ..................................................
2d.2. Are their floating or non-floating kelp bed(s) present with greater than
50% macro algal cover in the month of August or September?.. ............
3
YES: Go to 2b.3
NO: Go to Q.3
YES: Category I
NO: Go to Q.3
YES: Category I
NO: Go to 2c.2
YES: Category I
YES: Go to 2c.3
YES: Go to 2cA
YES: Category I
NO Category II
YES: Category II
NO: Category III
, YES: Category I
NO: go to 2d.2
YES: Category I
NO: Category II
Q.3. Category IV wetlands.
3a. Is the wetland: less than I acre and,
hydrologically isolated and,
comprised of one vegetated class that is dominated (> 80% areaI cover)
by one species from Table 3 (page 19) or Table 4 (page 20)
YEs: Category N
Rj!: go to 3b
3b. Is the wetland: less than two acres
and, hydrologically isolated,
with one vegetated class, and > 90% of areal cover in any combination of
species from Table 3 (page 19)
YEs: Category N
111: go to 3c
3c. Is the wetland excavated from upland and a pond smaller than 1 acre
without a surface water connection to streams, lakes, rivers, or other
wetland, and has < 0.1 acre of vegetation.
YEs: Category N
IQ: go to QA
Q.4. Significant habitat value.
Answer all questions and enter data requested.
Circle scores that qualify
Doints
6
5
4
~
2
I
o
~
>200
40-200
10-40
~m
1-5
0.1-1
<0.1
4a. Total wetland area
Estimate area, select from choices in the near-right column, and score in the
far column:
~~~~, ,e of wetland here: ~ !m':~~~, and source:
~~
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,
#of classes Points
1............0
2......H....~
3............6
4............ 8
5............10
Emergent: if the area of emergent class is > 1/4 acre,
Scrub-Shrub: if the area of scrub-shrub class is > 1/4 acre,
Forested: if area of forested class is > 1/4 acre,
Add the number of wetland classes, above, that qualifY, and then
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
4h above, count the nwnber of different plant species
you can fmd that cover more than 5% of the ground.
You do not havs to name them.
Class # species in class
Aquatic Bed I
2
3
>3
Points
o
1
2
3
Score in column at far right: Emergent
e.g. Ifa wetland has an aquatic bed class with 3 species,
an emergent class with 4 species and a scrub-shrub
class with 2 species you would circle 2, 2, and 1 in the
far column.
I
2-3
4-5
>5
o
I
2
3
4
Note: Any plant species with a cover of> 5%
qualifies for points within a class, even those
that are not of that class.
Scrub-Scrub
I 0
....
3-4 2
>4 3
Forested
I
2
3-4
>4
o
I
2
4d. Structural diversity.
If the wetland has a forested class, add I point if each of the following
Classes is present within the forested class and is larger than 1/4 acre:
-trees> 50' tall............ ................
-trees 20'- 49' tall........................
-shrubs...................................... .
-herbaceous ground cover... ... .. ..... '"
iiin. .-OiiiE- --....
_,g;;l
YES-I
YES-I
YES-I
Also add I point if there is any "open water" or "aquatic bed" class
Immediately next to the forested area (i.e. there is no scrub/shrub or
emergent vegetation between them).
YES-I
4e. Decide from the diagrams below whether interspersion between
wetland classes is high, moderate, low or none? If you think the
amount of interspersion falls in between the diagrams score accordingly
(i.e. a moderately high amount of interspersion would score a 4,
while a moderately low amount would score a 2)
Irone
moderate
low
moderale
5
High - 5
Moderate - 3
Low-I
t!&l';J,~
low
high
4fHabitat 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 YES=2
Is a heron rookery located within 3oo'? YES=I
Are raptor nest/s located within 300'1 YES = 1
Are there at least 3 standing dead trees (snags) per acre greater than YES = 1
10" in diameter at "breast height" (DSH)?
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=2
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. ?
4g. Connection to streams. (Score one answer only.)
4g.1. Does the wetland provide habitat for fish at any time of the year AND YES = 6
does it have a perennial surface water connection to a fish-bearing stream.
4g.2 Does the wetland provide fish habitat seasonally AND does it have YES=4
a seasonal surface water connection to a fish-bearing stream.
4g.3 Does the wetland function to export organic matter through a surface YES = 4
water connection at all times of the year to a perennial stream.
4g.4 Does the wetland function to export organic matter through a surface YES = 2
water connection to a stream on a seasonal basis?
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 Score = 5
more than 100'around 95% of the circumference.
Forest, scrub, native grassland, or open water buffers wider than 100'
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 Score = 3
circumference.
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 Score = 2
wetland circumference.
No roads, buildings or paved areas within 100' of the wetland for more than
95% of the wetland circumference. Score = 2
6
No roads, buildings or paved areas within 25' of the wetland for 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 = I
Paved areas, industrial areas or residential construction (with less than 50'
between houses) are less than 25 feet from the wetland for more than 95 %
of the circumference of the wetland.
Score = 0
4i. Connection to other habitat areas:
Select the description, which best matches the site being evaluated.
-Is the wetland connected to, or part of, a riparian corridor at least 100' wide
connecting two or more wetlands; or, is there an upland connection present
> 100' wide with good forest or shrub cover (>25% cover) connecting it with a YES = 5
Significant Habitat Area?
-Is the wetland connected to any other Habitat Area with either 1) a
forested/shrub corridor < 100' wide, or 2) a corridor that is > 100' wide, but Yes = 3
has a low vegetative cover less than 6 feet in height?
-Is the wetland connected to, or a part of, a riparian corridor between 50 _ 100'
wide with scrub/shrub or forest cover connection to other wetlands? Yes = 3
.
- Is the wetland connected to any other Habitat Area with narrow corridor
(<100') of low vegetation (< 6' in height)?
Yes=~
- Is the wetland and its buffer (if the buffer is less than 50' wide) completely
isolated by development (urban, residential with a density greater than 2/acre,
or industrial)?
Yes=O
Now add the scores circled (for Q.5a - Q.5i above) to get a total.
Is the Total greater than or equal to 22 points? ii.l3
YES - Category n
~O;; Cate20ry ill
7