Article IV. Shoreline Modification Development Standards
16.06.170 Roads, railroads and parking.
The following provisions shall apply to the location and construction of roads, railroads and parking within shorelines:
(1) Roads and railroads shall not be located within a designated stream corridor except where it is necessary to cross the corridor, or where existing development, topography, and other conditions preclude locations outside the stream corridor.
(A) Construction of roadways across stream corridors shall be by the most direct route possible having the least impact to the stream corridor.
(B) Roadways that must run parallel to stream or wetland edges shall be along routes having the greatest possible distance from stream or wetland and the least impact to the corridor.
(C) Roadways within the stream corridor shall not hydrologically obstruct, cut off or isolate stream corridor features.
(2) Material excavated from the roadway area to achieve the design grade shall be used as fill where necessary to maintain grade, or shall be transported outside the corridor.
(3) Necessary fill to elevate roadways shall not impede the normal flow of floodwaters or cause displacement that would increase the elevation of floodwaters such that it would cause properties not in the floodplain to be flood-prone.
(4) Spoil, construction waste, and other debris shall not be used as road fill or buried within the stream corridor.
(5) Bridges and water-crossing structures shall not constrict the stream channel or impede the flow of the ordinary high water, sediment and woody debris.
(6) Natural stream channels and drainage ways shall be preserved through the use of bridges for crossings, unless the use of culverts is demonstrated to be the only technically feasible means for crossing. The use of bridges shall be the preferred means to preserve natural streams and drainageways. Where bridges are not feasible, large, natural bottom culverts, multi-plate pipes and bottomless arches shall be used.
(7) The alignment and slope of culverts shall parallel and match the natural flow of streams or drainage ways, unless doing so conflicts with subsections (1) and (2) of this section, and shall be sized to accommodate ordinary high water, and shall terminate on stable, erosion-resistant materials.
(8) Where fish, amphibian or other wildlife passage is present, culverts shall be designed and constructed to specifications provided through the Washington State Aquatic Habitat Guidelines or a comparable source of expertise.
(9) At least one end of a wood stringer bridge shall be anchored to prevent it from being washed away during high water.
(10) Roads must be designed and constructed using established flood-resistant design and construction methods when they may be subject to damage by floodwaters.
(11) Roads and bridges within floodways must meet the requirements of Section 16.05.36.010 subsections (2) and (7).
(12) Additional Shoreline Standards for Roads, Railroads and Parking. The standards in this section only apply to new uses within shoreline jurisdiction.
(A) Parking areas shall be located upland of the areas they serve.
(B) Owners of two or more adjoining uses, structures or parcels of land may utilize jointly the same parking area when the hours of operation do not overlap.
(C) A conditional use permit for roads, railroads or parking areas must demonstrate through social, economic, environmental, and engineering studies that a shoreline location is the most feasible of the available options. (Ord. 2123, § 1 (Att.), 2021.)