Clearing and Grading | Environment & Sustainability
iii. Deviations. Deviation from excavation and fill limits shall be allowed as part of the review of a Type 1, Type 2 or Type 3 permit application to accommodate instances where driveway access would exceed 15 percent slope if additional fill is not permitted; where the five-foot fill maximum generally is observed but limited additional fill is necessary to accommodate localized undulations or variations in existing topography; where necessary to achieve a balance of excavation and fill associated with a project; or where a building foundation, access grade, drainage, or other necessary component of a proposed structure or infrastructure is determined infeasible. Deviations from the excavation and fill limits shall be subject to the following limitations: a) The proposed deviation is the minimum necessary to resolve the design conflict or allow a balance of excavation and fill as demonstrated through written engineering analysis prepared by a qualified consultant and verified by the City; b) The proposed deviation will not result in impact to the root zone and tree protection areas required for retained significant trees under SDC 21.03.060I.; c) All excavation or fill deviations shall be located outside of required structure setbacks; and
of individual lots. For parcels created after December 31, 2021 applicants must demonstrate that the need for additional excavation and fill cannot be alleviated by increasing the parcel size, shifting the locations of buildings and improvements, altering the building design, or other similar measures.
iv. Exceptions. The excavation and fill limitations of this subsection shall not apply to road construction, necessary underground infrastructure, and structures that do not change the surface elevation (e.g., vaults, utility trenches, foundations, basements, etc. b. Permit Approval. On sites where development is proposed or anticipated, land clearing shall not take place until a construction permit is approved, addressing all land use requirements and presenting final engineering design consistent with applicable development standards and adopted Public Works Standards. c. Slope. No slope of cut and fill surfaces shall be steeper than is safe for the intended use and shall not exceed two horizontal to one vertical, unless otherwise approved by the director. d. Erosion Control. All disturbed areas including faces of cuts and fill slopes shall be prepared and maintained to control erosion in compliance with subsection 1. of this section. e. Preparation of Ground. The ground surface shall be prepared to receive fill by removing unsuitable material
d) All fill in excess of four feet shall be engineered.
e) Subdivisions shall be designed to minimize the need for deviations for the development
Effective | January 1, 2022
Title 21: Sammamish Development Code | 185
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