HomeMy WebLinkAboutPN_Project_Narrative_LOMRF_15022_135thAveSE_250106_v1Project Narrative – Shoreline Exemption / LOMR-F Compliance Property Address: 15022 135th Ave
SE, Renton, WA 98058
Parcel Number: 2223059057
Zoning: R-4 Residential
Owner/Applicant: Ferose Babu
Project Overview This application requests a Shoreline Exemption for an after-the-fact minor fill
activity located within the Cedar River shoreline jurisdiction and mapped 100-year floodplain. A small
amount of clean soil fill, less than one foot in height, was placed adjacent to the existing
single-family residence and detached garage on this 11,100 square-foot lot during summer 2025. No
new construction occurred. The site is outside the regulatory floodway and within the Shoreline
Residential Environment. Both structures are long-established, permitted improvements dating to
1977.
Purpose and Need The fill was placed to raise the Lowest Adjacent Grades (LAG) of the house and
garage above the FEMA Base Flood Elevation (BFE) as part of a Letter of Map Revision Based on
Fill (LOMR-F) request to FEMA. The intent is to demonstrate that both structures are reasonably safe
from flooding and to remove them from the mapped Special Flood Hazard Area (SFHA).
Existing Site Conditions Lot Area: 11,100 sq ft (0.25 acre) Frontage: » 80 ft along Cedar River
(medium bank) Topography: Gently sloping lawn area; no wetlands, steep slopes, or geologic
hazards. Surface Cover: Existing lawn and landscaping only; no trees removed. Drainage: Surface
flow directed toward the street; unchanged by fill.
Completed Work A small quantity of clean topsoil was placed around limited portions of the foundations
(<1 ft deep). No excavation, structural work, or bank alteration occurred. All activity took place
landward of the Ordinary High-Water Mark (OHWM), more than 50 ft from the river.
Compensatory Storage To comply with RMC 4-3-050 E 3 (g), an equal or greater volume of
compensatory storage will be provided on-site through a shallow swale or depression at the same
elevation range as the fill. This ensures no net loss of effective flood-storage volume and maintains
natural drainage. No design features will trap or strand fish; slopes remain gentle and vegetated with
existing turf.
Environmental Considerations No impact to riparian vegetation, fish, or wildlife habitat. No in-water
work or disturbance of the riverbank. No vegetation removal beyond lawn areas. No change to site
hydrology or runoff patterns.
Supporting Materials Notarized Land Use Permit Master Application (with legal description). Annotated
Topographic Site Plan (Crones Survey) showing fill limits and compensatory-storage area. Elevation
Certificates – Residence and Garage. Harmsen BFE Calculation Letter. Neighborhood Map (showing
location and context).
Summary This request qualifies for a Shoreline Exemption under RMC 4-9-190 C.1 for a minor
alteration associated with an existing single-family residence. The work has no adverse environmental
impact, satisfies compensatory-storage requirements, and supports FEMA floodplain-compliance
efforts.
Prepared by:
Ferose Babu
Property Owner