HomeMy WebLinkAboutRS_Wetland Report_200123_v1Wetlands Northwest LLC
5218 Ivanhoe PL NE
Seattle, WA 98105
206-456-5474
www.wetlandsnw.com
January 23, 2020
Wayne Seminoff
PO Box 956
Kirkland, 98063
Re: King County Tax Parcel 074150-0080
18300 121st Pl SE, Renton, WA 98058
Dear Mr. Seminoff,
Following my site visit on January 20, 2020, I have determined that the off-site wetland is
Category III scoring 18 points overall which include 3 habitat points. The required buffer for this
type of wetland is 75 feet per the Renton Municipal Code Title 4-3-050.G.2 referenced in the
table below.
Wetlands Northwest LLC 2 January 2020
The laws applicable to critical areas are subject to varying interpretations. The work for this
report has conformed to the standard of cares employed by professional ecologists in the Puget
Sound region. No other representation or warranty, expressed or implied, is made concerning
the work or this report. This report is based largely on readily observable conditions and, to a
lesser extent, on readily ascertainable conditions. No attempt has been made to determine
hidden or concealed conditions. If hidden or concealed conditions arise, the information
contained in this report may change based upon those conditions.
Robert King is in his eighth year as founder and Principal of Wetlands Northwest LLC. He a
member in good standing of the Society Of Wetlands Scientists and is recognized as a
Professional Wetland Scientist, number 1711. Robert has 20 years of experience completing
natural resource assessments in the Puget Sound Region. He was previously employed by
several well-known engineering and natural resources firms in the Seattle area and between
2013 and 2018 he was temporarily employed the King County Department of Development
Permitting and Environmental Services (DPER) as an Environmental Scientist II.
If you have any questions, feel free to contact me at 206-554-1628.
Robert King, PWS
Principal
Wetland name or number
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 1 WSDOT Adapted Form - March 2, 2015
Name of wetland (or ID #):Date of site visit:1/20/20
Rated by Trained by Ecology? Yes No Date of training Dec-14
HGM Class used for rating Wetland has multiple HGM classes? Yes No
NOTE: Form is not complete with out the figures requested (figures can be combined ).
Source of base aerial photo/map
OVERALL WETLAND CATEGORY III (based on functions or special characteristics )
1. Category of wetland based on FUNCTIONS
Category I - Total score = 23 - 27 Score for each
Category II - Total score = 20 - 22 function based
X Category III - Total score = 16 - 19 on three
Category IV - Total score = 9 - 15 ratings
(order of ratings
is not
important )
M L 9 = H, H, H
H L 8 = H, H, M
L L Total 7 = H, H, L
7 = H, M, M
6 = H, M, L
6 = M, M, M
5 = H, L, L
5 = M, M, L
4 = M, L, L
3 = L, L, L
2. Category based on SPECIAL CHARACTERISTICS of wetland
XNone of the above
Coastal Lagoon
Interdunal
Value
Score Based on
Ratings 9 6 3 18
H
CHARACTERISTIC Category
Estuarine
Wetland of High Conservation Value
Bog
Mature Forest
Old Growth Forest
Depressional & Flats
RATING SUMMARY – Western Washington
List appropriate rating (H, M, L)
HydrologicImproving
Water Quality
HSite Potential
Landscape Potential
Habitat
H
FUNCTION
Wetland A
Robert King
USGS 2012 Aerial Photo
Wetland name or number
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 2 WSDOT Adapted Form - March 2, 2015
Maps and Figures required to answer questions correctly for
Western Washington
Depressional Wetlands
Map of: Figure #
Cowardin plant classes A
Hydroperiods B
Location of outlet (can be added to map of hydroperiods )N/A
Boundary of area within 150 ft of the wetland (can be added to another figure )C
Map of the contributing basin D
1 km Polygon: Area that extends 1 km from entire wetland edge - including
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website)F
Screen capture of list of TMDLs for WRIA in which unit is found (from web)G
Riverine Wetlands
Map of: Figure #
Cowardin plant classes
Hydroperiods
Ponded depressions
Boundary of area within 150 ft of the wetland (can be added to another figure )
Plant cover of trees, shrubs, and herbaceous plants
Width of unit vs. width of stream (can be added to another figure )
Map of the contributing basin
1 km Polygon: Area that extends 1 km from entire wetland edge - including
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website)
Screen capture of list of TMDLs for WRIA in which unit is found (from web)
Lake Fringe Wetlands
Map of: Figure #
Cowardin plant classes
Plant cover of trees, shrubs, and herbaceous plants
Boundary of area within 150 ft of the wetland (can be added to another figure )
1 km Polygon: Area that extends 1 km from entire wetland edge - including
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website)
Screen capture of list of TMDLs for WRIA in which unit is found (from web)
Slope Wetlands
Map of: Figure #
Cowardin plant classes
Hydroperiods
Plant cover of dense trees, shrubs, and herbaceous plants
Plant cover of dense, rigid trees, shrubs, and herbaceous plants
(can be added to another figure )
Boundary of area within 150 ft of the wetland (can be added to another figure )
1 km Polygon: Area that extends 1 km from entire wetland edge - including
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website)
Screen capture of list of TMDLs for WRIA in which unit is found (from web)
To answer questions:
D 1.3, H 1.1, H 1.4
D 1.4, H 1.2
D 1.1, D 4.1
D 2.2, D 5.2
D 4.3, D 5.3
H 2.1, H 2.2, H 2.3
D 3.1, D 3.2
D 3.3
To answer questions:
H 1.1, H 1.4
H 1.2
R 1.1
R 2.4
R 1.2, R 4.2
R 4.1
R 2.2, R 2.3, R 5.2
H 2.1, H 2.2, H 2.3
L 1.2
L 2.2
L 3.1, L 3.2
L 3.3
H 2.1, H 2.2, H 2.3
R 3.1
R 3.2, R 3.3
To answer questions:
L 1.1, L 4.1, H 1.1, H 1.4
S 3.1, S 3.2
S 3.3
S 4.1
S 2.1, S 5.1
To answer questions:
H 1.1, H 1.4
H 1.2
S 1.3
H 2.1, H 2.2, H 2.3
E
Wetland name or number
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 3 WSDOT Adapted Form - March 2, 2015
For questions 1 -7, the criteria described must apply to the entire unit being rated.
1. Are the water levels in the entire unit usually controlled by tides except during floods?
NO - go to 2 YES - the wetland class is Tidal Fringe - go to 1.1
1.1 Is the salinity of the water during periods of annual low flow below 0.5 ppt (parts per thousand)?
NO - Saltwater Tidal Fringe (Estuarine)YES - Freshwater Tidal Fringe
NO - go to 3 YES - The wetland class is Flats
If your wetland can be classified as a Flats wetland, use the form for Depressional wetlands.
3. Does the entire wetland unit meet all of the following criteria?
NO - go to 4 YES - The wetland class is Lake Fringe (Lacustrine Fringe)
4. Does the entire wetland unit meet all of the following criteria?
The wetland is on a slope (slope can be very gradual ),
The water leaves the wetland without being impounded.
NO - go to 5 YES - The wetland class is Slope
5. Does the entire wetland unit meet all of the following criteria?
The overbank flooding occurs at least once every 2 years.
NO - go to 6 YES - The wetland class is Riverine
NOTE: The Riverine unit can contain depressions that are filled with water when the river is not flooding.
If hydrologic criteria listed in each question do not apply to the entire unit being rated, you probably have a unit
with multiple HGM classes. In this case, identify which hydrologic criteria in questions 1 - 7 apply, and go to
Question 8.
At least 30% of the open water area is deeper than 6.6 ft (2 m).
HGM Classification of Wetland in Western Washington
If your wetland can be classified as a Freshwater Tidal Fringe use the forms for Riverine wetlands. If it
is Saltwater Tidal Fringe it is an Estuarine wetland and is not scored. This method cannot be used to
score functions for estuarine wetlands.
The vegetated part of the wetland is on the shores of a body of permanent open water (without any
plants on the surface at any time of the year) at least 20 ac (8 ha) in size;
The water flows through the wetland in one direction (unidirectional) and usually comes from seeps. It
may flow subsurface, as sheetflow, or in a swale without distinct banks.
NOTE: Surface water does not pond in these type of wetlands except occasionally in very small and shallow
depressions or behind hummocks (depressions are usually <3 ft diameter and less than 1 ft deep).
The unit is in a valley, or stream channel, where it gets inundated by overbank flooding
from that stream or river,
2. The entire wetland unit is flat and precipitation is the only source (>90%) of water to it.
Groundwater and surface water runoff are NOT sources of water to the unit.
Wetland name or number
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 4 WSDOT Adapted Form - March 2, 2015
NO - go to 7 YES - The wetland class is Depressional
NO - go to 8 YES - The wetland class is Depressional
NOTES and FIELD OBSERVATIONS:
7. Is the entire wetland unit located in a very flat area with no obvious depression and no overbank flooding? The
unit does not pond surface water more than a few inches. The unit seems to be maintained by high groundwater in
the area. The wetland may be ditched, but has no obvious natural outlet.
8. Your wetland unit seems to be difficult to classify and probably contains several different HGM classes. For
example, seeps at the base of a slope may grade into a riverine floodplain, or a small stream within a
Depressional wetland has a zone of flooding along its sides. GO BACK AND IDENTIFY WHICH OF THE
HYDROLOGIC REGIMES DESCRIBED IN QUESTIONS 1-7 APPLY TO DIFFERENT AREAS IN THE UNIT (make a
rough sketch to help you decide). Use the following table to identify the appropriate class to use for the rating
system if you have several HGM classes present within the wetland unit being scored.
6. Is the entire wetland unit in a topographic depression in which water ponds, or is saturated to the surface, at
some time during the year? This means that any outlet, if present, is higher than the interior of the wetland.
Riverine
Treat as
ESTUARINE
Slope + Lake Fringe
Depressional + Riverine along stream
within boundary of depression
Depressional + Lake Fringe
Riverine + Lake Fringe
NOTE: Use this table only if the class that is recommended in the second column represents 10% or more of the
total area of the wetland unit being rated. If the area of the HGM class listed in column 2 is less than 10% of the
unit; classify the wetland using the class that represents more than 90% of the total area.
HGM classes within the wetland unit
being rated
Slope + Riverine
Slope + Depressional
Depressional
Depressional
If you are still unable to determine which of the above criteria apply to your wetland, or if you have more than 2
HGM classes within a wetland boundary, classify the wetland as Depressional for the rating.
Salt Water Tidal Fringe and any other
class of freshwater wetland
HGM class to
use in rating
Riverine
Depressional
Lake Fringe
Wetland name or number
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 5 WSDOT Adapted Form - March 2, 2015
D 1.1. Characteristics of surface water outflows from the wetland:
points = 3
points = 2
points = 1
points = 1
Yes = 4 No = 0
Wetland has persistent, ungrazed, plants > 95% of area points = 5
Wetland has persistent, ungrazed, plants > ½ of area points = 3
Wetland has persistent, ungrazed plants > 1/10 of area points = 1
Wetland has persistent, ungrazed plants < 1/10 of area points = 0
D 1.4. Characteristics of seasonal ponding or inundation:
This is the area that is ponded for at least 2 months. See description in manual.
Area seasonally ponded is > ½ total area of wetland points = 4
Area seasonally ponded is > ¼ total area of wetland points = 2
Area seasonally ponded is < ¼ total area of wetland points = 0
Total for D 1 Add the points in the boxes above 12
Rating of Site Potential If score is: 12 - 16 = H 6 - 11 = M 0 - 5 = L Record the rating on the first page
D 2.1. Does the wetland unit receive stormwater discharges?Yes = 1 No = 0 1
Yes = 1 No = 0
D 2.3. Are there septic systems within 250 ft of the wetland?Yes = 1 No = 0 0
Source Yes = 1 No = 0
Total for D 2 Add the points in the boxes above 3
Rating of Landscape Potential If score is: 3 or 4 = H 1 or 2 = M 0 = L Record the rating on the first page
Yes = 1 No = 0
Yes = 1 No = 0
Yes = 2 No = 0
Total for D 3 Add the points in the boxes above 2
Rating of Value If score is: 2 - 4 = H 1 = M 0 = L Record the rating on the first page
D 3.3. Has the site been identified in a watershed or local plan as important for
maintaining water quality (answer YES if there is a TMDL for the basin in which
the unit is found )?
D 1.2. The soil 2 in below the surface (or duff layer) is true clay or true organic
(use NRCS definitions ).
D 1.3. Characteristics and distribution of persistent plants (Emergent, Scrub-shrub, and/or Forested
Cowardin classes):
D 2.4. Are there other sources of pollutants coming into the wetland that are not
listed in questions D 2.1 - D 2.3?
D 3.1. Does the wetland discharge directly (i.e., within 1 mi) to a stream, river,
lake, or marine water that is on the 303(d) list?
D 2.2. Is > 10% of the area within 150 ft of the wetland in land uses that generate
pollutants?
D 3.2. Is the wetland in a basin or sub-basin where an aquatic resource is on the 303(d) list?
D 3.0. Is the water quality improvement provided by the site valuable to society?
0
0
2
0
5
DEPRESSIONAL AND FLATS WETLANDS
Pets
1
1
Water Quality Functions - Indicators that the site functions to improve water quality
D 1.0. Does the site have the potential to improve water quality?
3
Wetland has an unconstricted, or slightly constricted, surface outlet
that is permanently flowing
Wetland has an intermittently flowing stream or ditch, OR highly
constricted permanently flowing outlet.
Wetland is a depression or flat depression (QUESTION 7 on key) with
no surface water leaving it (no outlet).
Wetland is a flat depression (QUESTION 7 on key), whose outlet is a
permanently flowing ditch.
4
D 2.0. Does the landscape have the potential to support the water quality function of the site?
Wetland name or number
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 6 WSDOT Adapted Form - March 2, 2015
D 4.1. Characteristics of surface water outflows from the wetland:
points = 4
points = 2
points = 1
points = 0
Marks of ponding are 3 ft or more above the surface or bottom of outlet points = 7
Marks of ponding between 2 ft to < 3 ft from surface or bottom of outlet points = 5
Marks are at least 0.5 ft to < 2 ft from surface or bottom of outlet points = 3
The wetland is a “headwater” wetland points = 3
Wetland is flat but has small depressions on the surface that trap water points = 1
Marks of ponding less than 0.5 ft (6 in)points = 0
The area of the basin is less than 10 times the area of the unit points = 5
The area of the basin is 10 to 100 times the area of the unit points = 3
The area of the basin is more than 100 times the area of the unit points = 0
Entire wetland is in the Flats class points = 5
Total for D 4 Add the points in the boxes above 10
Rating of Site Potential If score is: 12 - 16 = H 6 - 11 = M 0 - 5 = L Record the rating on the first page
D 5.1. Does the wetland unit receive stormwater discharges?Yes = 1 No = 0 1
D 5.2. Is > 10% of the area within 150 ft of the wetland in land uses that generate excess runoff?
Yes = 1 No = 0
Yes = 1 No = 0
Total for D 5 Add the points in the boxes above 3
Rating of Landscape Potential If score is: 3 = H 1 or 2 = M 0 = L Record the rating on the first page
points = 2
points = 1
Flooding from groundwater is an issue in the sub-basin.points = 1
points = 0
There are no problems with flooding downstream of the wetland.points = 0
Yes = 2 No = 0
Total for D 6 Add the points in the boxes above 0
Rating of Value If score is: 2 - 4 = H 1 = M 0 = L Record the rating on the first page
1
1
D 5.3. Is more than 25% of the contributing basin of the wetland covered with intensive human land
uses (residential at >1 residence/ac, urban, commercial, agriculture, etc.)?
The existing or potential outflow from the wetland is so constrained by
human or natural conditions that the water stored by the wetland
cannot reach areas that flood. Explain why
0
0
3
D 4.2. Depth of storage during wet periods: Estimate the height of ponding above the bottom of the
outlet. For wetlands with no outlet, measure from the surface of permanent water or if dry, the
deepest part.
D 4.3. Contribution of the wetland to storage in the watershed: Estimate the ratio of the area of
upstream basin contributing surface water to the wetland to the area of the wetland unit itself.
D 6.1. The unit is in a landscape that has flooding problems. Choose the description that best
matches conditions around the wetland unit being rated. Do not add points. Choose the highest
score if more than one condition is met.
D 6.2. Has the site been identified as important for flood storage or flood
conveyance in a regional flood control plan?
Hydrologic Functions - Indicators that the site functions to reduce flooding and stream degradation
D 4.0. Does the site have the potential to reduce flooding and erosion?
4
Wetland is a depression or flat depression with no surface water
leaving it (no outlet)
Wetland has an unconstricted, or slightly constricted, surface outlet
that is permanently flowing
Wetland has an intermittently flowing stream or ditch, OR highly
constricted permanently flowing outlet
Wetland is a flat depression (QUESTION 7 on key), whose outlet is a
permanently flowing ditch
3
D 5.0. Does the landscape have the potential to support hydrologic function of the site?
D 6.0. Are the hydrologic functions provided by the site valuable to society?
The wetland captures surface water that would otherwise flow down-gradient into areas
where flooding has damaged human or natural resources (e.g., houses or salmon redds):
Flooding occurs in a sub-basin that is immediately down-
gradient of unit.
Surface flooding problems are in a sub-basin farther down-
gradient.
DEPRESSIONAL AND FLATS WETLANDS
Wetland name or number
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 7 WSDOT Adapted Form - March 2, 2015
HABITAT FUNCTIONS - Indicators that site functions to provide important habitat
H 1.0. Does the site have the potential to provide habitat?
Aquatic bed 4 structures or more: points = 4
Emergent 3 structures: points = 2
Scrub-shrub (areas where shrubs have > 30% cover)2 structures: points - 1
Forested (areas where trees have > 30% cover)1 structure: points = 0
If the unit has a Forested class, check if :
H 1.2. Hydroperiods
Permanently flooded or inundated 4 or more types present: points = 3
Seasonally flooded or inundated 3 types present: points = 2
Occasionally flooded or inundated 2 types present: points = 1
Saturated only 1 types present: points = 0
Permanently flowing stream or river in, or adjacent to, the wetland
Seasonally flowing stream in, or adjacent to, the wetland
Lake Fringe wetland 2 points
Freshwater tidal wetland 2 points
H 1.3. Richness of plant species
If you counted:> 19 species points = 2
5 - 19 species points = 1
< 5 species points = 0
H 1.4. Interspersion of habitats
None = 0 points Low = 1 point Moderate = 2 points
All three diagrams
in this row are
HIGH = 3 points
1
Check the types of water regimes (hydroperiods) present within the wetland. The water regime has
to cover more than 10% of the wetland or ¼ ac to count (see text for descriptions of hydroperiods ).
1
Count the number of plant species in the wetland that cover at least 10 ft2.Different patches of the same species can be combined to meet the size threshold and you do not
have to name the species. Do not include Eurasian milfoil, reed canarygrass, purple loosestrife,
Canadian thistle 1
Decide from the diagrams below whether interspersion among Cowardin plants classes (described
in H 1.1), or the classes and unvegetated areas (can include open water or mudflats) is high,
moderate, low, or none. If you have four or more plant classes or three classes and open water, the
rating is always high.
These questions apply to wetlands of all HGM classes.
The Forested class has 3 out of 5 strata (canopy, sub-canopy, shrubs, herbaceous,
moss/ground-cover) that each cover 20% within the Forested polygon
0
H 1.1. Structure of plant community: Indicators are Cowardin classes and strata within the Forested
class. Check the Cowardin plant classes in the wetland. Up to 10 patches may be combined for
each class to meet the threshold of ¼ ac or more than 10% of the unit if it is smaller than 2.5 ac. Add
the number of structures checked.
Wetland name or number
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 8 WSDOT Adapted Form - March 2, 2015
H 1.5. Special habitat features:
Large, downed, woody debris within the wetland (> 4 in diameter and 6 ft long)
Standing snags (dbh > 4 in) within the wetland
Total for H 1 Add the points in the boxes above 3
Rating of Site Potential If Score is: 15 - 18 = H 7 - 14 = M 0 - 6 = L Record the rating on the first page
H 2.0. Does the landscape have the potential to support the habitat function of the site?
H 2.1 Accessible habitat (include only habitat that directly abuts wetland unit ).
Calculate:
0 % undisturbed habitat + (0 % moderate & low intensity land uses / 2 ) = 0%
If total accessible habitat is:
> 1/3 (33.3%) of 1 km Polygon points = 3
20 - 33% of 1 km Polygon points = 2
10 - 19% of 1 km Polygon points = 1
< 10 % of 1 km Polygon points = 0
H 2.2. Undisturbed habitat in 1 km Polygon around the wetland.
Calculate:
29 % undisturbed habitat + (0 % moderate & low intensity land uses / 2 ) = 29%
Undisturbed habitat > 50% of Polygon points = 3
Undisturbed habitat 10 - 50% and in 1-3 patches points = 2
Undisturbed habitat 10 - 50% and > 3 patches points = 1
Undisturbed habitat < 10% of 1 km Polygon points = 0
H 2.3 Land use intensity in 1 km Polygon: If
> 50% of 1 km Polygon is high intensity land use points = (-2)
≤ 50% of 1km Polygon is high intensity points = 0
Total for H 2 Add the points in the boxes above -1
Rating of Landscape Potential If Score is: 4 - 6 = H 1 - 3 = M < 1 = L Record the rating on the first page
Site meets ANY of the following criteria:points = 2
It has 3 or more priority habitats within 100 m (see next page)
It is mapped as a location for an individual WDFW priority species
Site has 1 or 2 priority habitats (listed on next page) with in 100m points = 1
Site does not meet any of the criteria above points = 0
Rating of Value If Score is: 2 = H 1 = M 0 = L Record the rating on the first page
Check the habitat features that are present in the wetland. The number of checks is the number of
points.
It has been categorized as an important habitat site in a local or
regional comprehensive plan, in a Shoreline Master Plan, or in a
watershed plan
Undercut banks are present for at least 6.6 ft (2 m) and/or overhanging plants extends at
least 3.3 ft (1 m) over a stream (or ditch) in, or contiguous with the wetland, for at least 33
ft (10 m)
Stable steep banks of fine material that might be used by beaver or muskrat for denning (>
30 degree slope) OR signs of recent beaver activity are present (cut shrubs or trees that
have not yet weathered where wood is exposed )
At least ¼ ac of thin-stemmed persistent plants or woody branches are present in areas
that are permanently or seasonally inundated (structures for egg-laying by amphibians )
0
It is a Wetland of High Conservation Value as determined by the
Department of Natural Resources
0
Invasive plants cover less than 25% of the wetland area in every stratum of plants (see H
1.1 for list of strata )
0
1
-2
H 3.0. Is the habitat provided by the site valuable to society?
H 3.1. Does the site provide habitat for species valued in laws, regulations, or policies? Choose only
the highest score that applies to the wetland being rated .
It provides habitat for Threatened or Endangered species (any plant or
animal on the state or federal lists)
Wetland name or number
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 9 WSDOT Adapted Form - March 2, 2015
Aspen Stands: Pure or mixed stands of aspen greater than 1 ac (0.4 ha).
Herbaceous Balds: Variable size patches of grass and forbs on shallow soils over bedrock.
Cliffs: Greater than 25 ft (7.6 m) high and occurring below 5000 ft elevation.
Priority habitats listed by WDFW (see complete descriptions of WDFW priority habitats, and the counties in which
they can be found, in: Washington Department of Fish and Wildlife. 2008. Priority Habitat and Species List.
Olympia, Washington. 177 pp.
Oregon White Oak: Woodland stands of pure oak or oak/conifer associations where canopy coverage of
the oak component is important (full descriptions in WDFW PHS report p. 158 – see web link above ).
Riparian: The area adjacent to aquatic systems with flowing water that contains elements of both aquatic
and terrestrial ecosystems which mutually influence each other.
Westside Prairies : Herbaceous, non-forested plant communities that can either take the form of a dry
prairie or a wet prairie (full descriptions in WDFW PHS report p. 161 – see web link above ).
Instream: The combination of physical, biological, and chemical processes and conditions that interact
to provide functional life history requirements for instream fish and wildlife resources.
Nearshore: Relatively undisturbed nearshore habitats. These include Coastal Nearshore, Open Coast
Nearshore, and Puget Sound Nearshore. (full descriptions of habitats and the definition of relatively
undisturbed are in WDFW report – see web link on previous page ).
Snags and Logs: Trees are considered snags if they are dead or dying and exhibit sufficient decay
characteristics to enable cavity excavation/use by wildlife. Priority snags have a diameter at breast
height of > 20 in (51 cm) in western Washington and are > 6.5 ft (2 m) in height. Priority logs are > 12 in
(30 cm) in diameter at the largest end, and > 20 ft (6 m) long.
Talus : Homogenous areas of rock rubble ranging in average size 0.5 - 6.5 ft (0.15 - 2.0 m), composed of
basalt, andesite, and/or sedimentary rock, including riprap slides and mine tailings. May be associated
with cliffs.
Caves: A naturally occurring cavity, recess, void, or system of interconnected passages under the earth
in soils, rock, ice, or other geological formations and is large enough to contain a human.
Note: All vegetated wetlands are by definition a priority habitat but are not included in this list because they are
addressed elsewhere.
WDFW Priority Habitats
Count how many of the following priority habitats are within 330 ft (100 m) of the wetland unit: NOTE : This
question is independent of the land use between the wetland unit and the priority habitat.
Biodiversity Areas and Corridors : Areas of habitat that are relatively important to various species of
native fish and wildlife (full descriptions in WDFW PHS report ).
Old-growth/Mature forests : Old-growth west of Cascade crest – Stands of at least 2 tree species,
forming a multi-layered canopy with occasional small openings; with at least 8 trees/ac (20 trees/ha) >
32 in (81 cm) dbh or > 200 years of age. Mature forests – Stands with average diameters exceeding 21
in (53 cm) dbh; crown cover may be less than 100%; decay, decadence, numbers of snags, and quantity
of large downed material is generally less than that found in old-growth; 80-200 years old west of the
Cascade crest.
http://wdfw.wa.gov/publications/00165/wdfw00165.pdf or access the list from here:
http://wdfw.wa.gov/conservation/phs/list/
Wetland name or number
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 10 WSDOT Adapted Form - March 2, 2015
Wetland Type Category
Check off any criteria that apply to the wetland. List the category when the appropriate criteria are met.
SC 1.0. Estuarine Wetlands
Does the wetland meet the following criteria for Estuarine wetlands?
The dominant water regime is tidal,
Vegetated, and
With a salinity greater than 0.5 ppt
Yes - Go to SC 1.1 No = Not an estuarine wetland
SC 1.1.
Yes = Category I No - Go to SC 1.2
SC 1.2.Is the wetland unit at least 1 ac in size and meets at least two of the following three conditions?
Yes = Category I No = Category II
SC 2.0. Wetlands of High Conservation Value (WHCV)
SC 2.1.
Yes - Go to SC 2.2 No - Go to SC 2.3
SC 2.2.Is the wetland listed on the WDNR database as a Wetland of High Conservation Value?
Yes = Category I No = Not WHCV
SC 2.3.Is the wetland in a Section/Township/Range that contains a Natural Heritage wetland?
http://www1.dnr.wa.gov/nhp/refdesk/datasearch/wnhpwetlands.pdf
Yes - Contact WNHP/WDNR and to SC 2.4 No = Not WHCV
SC 2.4.
Yes = Category I No = Not WHCV
SC 3.0. Bogs
SC 3.1.
Yes - Go to SC 3.3 No - Go to SC 3.2
SC 3.2.
Yes - Go to SC 3.3 No = Is not a bog
SC 3.3.
Yes = Is a Category I bog No - Go to SC 3.4
SC 3.4.
Yes = Is a Category I bog No = Is not a bog
NOTE: If you are uncertain about the extent of mosses in the understory, you may
substitute that criterion by measuring the pH of the water that seeps into a hole dug at least
16 in deep. If the pH is less than 5.0 and the plant species in Table 4 are present, the
wetland is a bog.
Is an area with peats or mucks forested (> 30% cover) with Sitka spruce, subalpine fir,
western red cedar, western hemlock, lodgepole pine, quaking aspen, Engelmann spruce,
or western white pine, AND any of the species (or combination of species) listed in Table 4
provide more than 30% of the cover under the canopy?
CATEGORIZATION BASED ON SPECIAL CHARACTERISTICS
Is the wetland within a National Wildlife Refuge, National Park, National Estuary Reserve,
Natural Area Preserve, State Park or Educational, Environmental, or Scientific Reserve
designated under WAC 332-30-151?
The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation, grazing,
and has less than 10% cover of non-native plant species. (If non-native species are
Spartina , see page 25)
At least ¾ of the landward edge of the wetland has a 100 ft buffer of shrub, forest, or un-
grazed or un-mowed grassland.
The wetland has at least two of the following features: tidal channels, depressions with
open water, or contiguous freshwater wetlands.
Has WDNR identified the wetland within the S/T/R as a Wetland of High Conservation
Value and listed it on their website?
Has the WA Department of Natural Resources updated their website to include the list of
Wetlands of High Conservation Value?
Does the wetland (or any part of the unit) meet both the criteria for soils and vegetation in
bogs? Use the key below. If you answer YES you will still need to rate the wetland
based on its functions .
Does an area within the wetland unit have organic soil horizons, either peats or mucks,
that compose 16 in or more of the first 32 in of the soil profile?
Does an area within the wetland unit have organic soils, either peats or mucks, that are
less than 16 in deep over bedrock, or an impermeable hardpan such as clay or volcanic
ash, or that are floating on top of a lake or pond?
Does an area with peats or mucks have more than 70% cover of mosses at ground level,
AND at least a 30% cover of plant species listed in Table 4?
Wetland name or number
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 11 WSDOT Adapted Form - March 2, 2015
SC 4.0. Forested Wetlands
Yes = Category I No = Not a forested wetland for this section
SC 5.0. Wetlands in Coastal Lagoons
Does the wetland meet all of the following criteria of a wetland in a coastal lagoon?
Yes - Go to SC 5.1 No = Not a wetland in a coastal lagoon
SC 5.1. Does the wetland meet all of the following three conditions?
The wetland is larger than 1/10 ac (4350 ft2)
Yes = Category I No = Category II
SC 6.0. Interdunal Wetlands
In practical terms that means the following geographic areas:
Long Beach Peninsula: Lands west of SR 103
Grayland-Westport: Lands west of SR 105
Ocean Shores-Copalis: Lands west of SR 115 and SR 109
Yes - Go to SC 6.1 No = Not an interdunal wetland for rating
SC 6.1.
Yes = Category I No - Go to SC 6.2
SC 6.2.Is the wetland 1 ac or larger, or is it in a mosaic of wetlands that is 1 ac or larger?
Yes = Category II No - Go to SC 6.3
SC 6.3.
Yes = Category III No = Category IV
Category of wetland based on Special Characteristics
If you answered No for all types, enter “Not Applicable” on Summary Form
The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation, grazing),
and has less than 20% cover of aggressive, opportunistic plant species (see list of species
on p. 100).
At least ¾ of the landward edge of the wetland has a 100 ft buffer of shrub, forest, or un-
grazed or un-mowed grassland.
Is the wetland west of the 1889 line (also called the Western Boundary of Upland
Ownership or WBUO)? If you answer yes you will still need to rate the wetland based
on its habitat functions.
Is the wetland 1 ac or larger and scores an 8 or 9 for the habitat functions on the form
(rates H,H,H or H,H,M for the three aspects of function)?
Is the unit between 0.1 and 1 ac, or is it in a mosaic of wetlands that is between 0.1 and 1
ac?
The wetland lies in a depression adjacent to marine waters that is wholly or partially
separated from marine waters by sandbanks, gravel banks, shingle, or, less frequently,
rocks
The lagoon in which the wetland is located contains ponded water that is saline or
brackish (> 0.5 ppt) during most of the year in at least a portion of the lagoon (needs to be
measured near the bottom )
Does the wetland have at least 1 contiguous acre of forest that meets one of these criteria
for the WA Department of Fish and Wildlife’s forests as priority habitats? If you answer
YES you will still need to rate the wetland based on its functions.
Old-growth forests (west of Cascade crest): Stands of at least two tree species, forming a
multi-layered canopy with occasional small openings; with at least 8 trees/ac (20 trees/ha)
that are at least 200 years of age OR have a diameter at breast height (dbh) of 32 in (81
cm) or more.
Mature forests (west of the Cascade Crest): Stands where the largest trees are 80- 200
years old OR the species that make up the canopy have an average diameter (dbh)
exceeding 21 in (53 cm).
SE 184TH ST121ST PL SEPSS - SpireaPSS - Willow
PEM - RC Grass
Figure A - Cowardin Class
0 100 20050
Feet ±1 inch equals 100 feet
Legend
Site
Cowardin Class
KC Parcels
SE 184TH ST121ST PL SEFigure B - Hydroperiods
0 100 20050
Feet ±1 inch equals 100 feet
Legend
Site
KC Parcels
Hydroperiods
Saturated
Seasonal
6.3 Ac.
1.1 Ac.0.2 AC.
0.1 Ac.
Figure C - 150-Foot Buffer
(18% undisturbed)
0 150 30075
Feet ±1 inch equals 150 feet
Legend
Wetland Assessment Unit
150-Foot Buffer
Figure D - Contributing Basin
0 250 500125
Feet ±1 inch equals 250 feet
Legend
Contributing Basin (30.0 Acres)
Wetland Assessment Unit (2.0 Acres)
Figure E - Adjacent and Undisturbed Habitat
0 1,100 2,200550
Feet ±1 inch equals 1,100 feet
Legend
Undisturbed Habitat (258 Acres/29.0 %)
Adjacent Habitat (2 Acres/0.20%)
1 KM Buffer (898 Acres)
Figure FSources: Esri, HERE, Garmin, Intermap, increment P Corp., GEBCO, USGS,FAO, NPS, NRCAN, GeoBase, IGN, Kadaster NL, Ordnance Survey, EsriJapan, METI, Esri China (Hong Kong), (c) OpenStreetMap contributors, andJanuary 23, 202000.510.25MilesKAssessedWaters/SedimentWaterCategory 5 - 303dCategory 4CCategory 4BCategory 4ACategory 2Category 1SedimentCategory 5 - 303dCategory 4CCategory 4BCategory 4ACategory 2Category 1Sub-Watershed (12 digitHUC)
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0'10'EXISTING HOUSEEXISTING HOUSESCALE: 1" = 10'
AGENT: GEORGE STEIRER – PLAN TO PERMIT, LLC
George@plantopermit.com
206-909-2893
www.PlanToPermit.com
OWNER: TRUDEL, LLC
DATE: 08/28/2019
REV1: 03/30/2020
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