HomeMy WebLinkAboutEX_06_RS_25103_Ultima_In-lieu_Fee_Plan_(2)1
IN-LIEU FEE USE PLAN
Renton Highlands Short Plat – Ultima Homes LLC
September 7, 2025
Sewall Wetland Consulting, Inc.
For:
Altaf Gilani
Ultima Homes LLC
17912 NE 27th St
Redmond, Washington, 98052
In-Lieu Fee Use Plan Outline
1. Project Description
Parcel #1123059068, is located on the south side of NE 8th Street/aka SE 120th Street in the City
of Renton, Washington. This project site consists of an irregular shaped parcel with a total area
of 1.93 acres and located within the SW ¼ of Section 11, Township 23 North, Range 5 East of
the W.M. The site is a mix of undeveloped forested area, old pasture and disturbed areas.
The proposed project is a 6 lot plat with associated infrastructure. The City requires Pasco Place
SE, which abuts the south end of the site to be extended into the site. This will require filling of
Wetland A completely to construct the road. Wetland B, a small low function Category IV
wetland which is 469sf in size is also proposed to be filled. This wetland is of very low function,
yet the wetland and its associated buffer greatly reduce the available area for development on the
site.
These two small, Category IV wetlands with a total area of 991sf area proposed to be mitigated
off-site within The King County Mitigation Reserves In-Lieu Fee Mitigation Program (KC
MRP).
Total impacts from this project are as follows;
Category IV wetland fill - 991sf (0.0226 ac)
2. Existing Conditions of Wetlands and Buffers
Uplands
The site is a mix of deciduous forest and disturbed areas. The overstory is generally a mix of big
leaf maple, black cottonwoods, bitter cherry, red alder and scattered mountain ash and apple
trees to the west.
EXHIBIT 6
RECEIVED
09/29/2025 jding
PLANNING DIVISION
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The understory consists of thickets of Himalayan blackberry, sword fern, Indian plum, vine
maple and in disturbed areas some soft rush. The western side of the site is a fallow pasture area
vegetated with a mix of pasture grasses and scotch broom. This area contains a garden on the
south side of the pasture area. The site is surrounded by single family homes to the north, south
west and west.
Soil pits excavated in the majority of the site consist of high chroma gravelly loam soils which
do not meet hydric soil criteria.
A total of two (2) wetlands were identified in the project are.
Table 1. Summary of Wetland Conditions
Wetland Water Quality Hydrologic Habitat Total Category
A 6 5 3 14 IV
B 5 5 3 13 IV
Below is a brief description of the wetlands with proposed impacts;
Wetland A
Wetland A consists of a small (522sf), disturbed area on the southeast corner of the site that is
partially within an old excavated ditch and abuts a gravel driveway to the east. This wetland
was flagged with pink wire flagging labeled A1-A6.
The wetland is vegetated with a mix of reed canary grass, soft rush, creeping buttercup and some
hardhack.
Soil pits excavated within the wetland revealed a silty loam with a B-horizon soil color of 10YR
2/1 with few, fine faint redoximorphic concentrations. Soils within this area remained saturated
within 9”-12” of the surface in the early growing season (march). This area was observed to be
saturated to the surface during our non-growing season winter observations of the site.
Using the 2014 WADOE Wetland Rating system (2023 updated form) and rating the wetland as
a depressional type wetland, this wetland scored a total of 14 points with 3 for habitat which
indicates a Category IV wetland.
According to City of Renton Municipal Code 4-3-050G.2, Category IV wetlands with a land use
such as a subdivision have a 50’ buffer measured from the wetland edge.
Wetland B
Wetland B consists of a small (469sf), depression near the north edge of the site on the western
side. It appears uncontrolled roof runoff from the garage building to the north may contribute to
this area.
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This small wetland was flagged with pink wire flags labeled B1-B6. The wetland is a partially
bare depression with some sedge, dagger leaf rush, creeping buttercup and Watsons willow herb.
Soil pits excavated within the wetland revealed a silty loam with a B-horizon soil color of 10YR
2/2 with few, fine faint redoximorphic concentrations. Soils within this area remained saturated
within 10”-12” of the surface in the early growing season (march). This area was observed to be
saturated to the surface during our non-growing season winter observations of the site.
Using the 2014 WADOE Wetland Rating system (2023 updated form) and rating the wetland as
a depressional type wetland, this wetland scored a total of 13 points with 3 for habitat which
indicates a Category IV wetland.
According to City of Renton Municipal Code 4-3-050G.2, Category IV wetlands with a land use
such as a subdivision have a 50’ buffer measured from the wetland edge.
3. Avoidance and Minimization of Wetland Impacts
The proposed project is a 6 lot plat with associated infrastructure. The City requires Pasco Place
SE, which abuts the south end of the site to be extended into the site. This will require filling of
Wetland A completely to construct the road. Wetland B, a small low function Category IV
wetland which is 469sf in size is also proposed to be filled. This wetland is of very low function,
yet the wetland and its associated buffer greatly reduce the available area for development on the
site.
Given the location of the two, low function wetlands on the site, preserving the wetlands would
greatly decrease if not eliminate the use of the site and limit the site’s ability under current
zoning to meet the need for additional housing requirements in the City. The project is
proposing to fill both Wetlands A & Wetland B.
Alternative site plans and building layouts or reductions in the density or scope for the proposal
were considered, but as previously stated, the feasibility of multifamily development on the site
as zoned is greatly diminished
4. Unavoidable Wetland Impact Acreage
A total of 0.0277 acres of wetland will be filled by this project. to be mitigated through credit
purchase in the KC MRP.
Table 2
Expected Impacts to Wetlands
Wetland
Identifier
Wetland
Area
(acres)
Permanently
Filled
Wetland Area
(acres)
Temporarily
Impacted
Wetland Area
(acres)
Indirect
Impact Area
(acres) Cowardin
Classification
Ecology
Rating
Local
Jurisdiction
Rating
HGM
Classification
A 0.0119 0 0 PEM IV IV Depressional
B 0.0107 0 0 PEM IV IV Depressional
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Wetland
Identifier
Wetland
Area
(acres)
Permanently
Filled
Wetland Area
(acres)
Temporarily
Impacted
Wetland Area
(acres)
Indirect
Impact Area
(acres) Cowardin
Classification
Ecology
Rating
Local
Jurisdiction
Rating
HGM
Classification
TOTALS 0.0226 0 0
5. Impacted Wetland Functions
As indicated by the ratings of the site’s wetlands, functions are low to moderate depending upon
the wetland impacted. Stormwater and water functions of these wetlands will be partially
mitigated through the sites stormwater system. Other functions will be replaced though off-site
KC MRP credit purchase.
6. Proposed Mitigation Credits
The KC MRP will provide mitigation credits under this In-Liue Fee Use Plan as depicted below
which were calculated using the methodology described in WADOE 2012 “Calculating Debits
and Credits for Compensatory Mitigation for Wetlands in Western Washington”. The credits
have been calculated using the WADOE Spreadsheet and the credit calculation is as follows:
10. Credit Purchase or Transfer Timing
The applicant will enter into a Purchase Agreement with the representative of the King County
Mitigation Reserves In-Lieu Fee Mitigation for mitigation credits depicted above in Section 6 of
this plan that would appropriately mitigate for the proposed project impacts. Purchase of credits
will be completed prior to the applicant’s construction activities occurring and as a condition of
the applicant’s permit issuance. Nothing in the mitigation credit Purchase Agreement shall be
interpreted or construed to permit any activity that otherwise requires a federal, state and/or local
permit.
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Proof of the mitigation transfer will be provided in the form of a notification letter to the
approving agency(s). Upon service of this notification, the mitigation requirement
to purchase mitigation credits will be fully satisfied.
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