Environment & Sustainability | Environmentally Critical Areas
b) The applicant demonstrates that the new crossing creates less overall or less incremental impacts to critical areas and habitat than the use of an existing corridor while still achieving overall project goals and objectives; ii. All crossings avoid or minimize impact to the wetland and provide mitigation for unavoidable impacts through restoration, enhancement or replacement of disturbed areas as described in this chapter and in the SMC; iii. Crossings do not significantly change the overall wetland hydrology; iv. Crossings do not diminish the flood storage capacity of the wetland; and v. All crossings are constructed during summer low water periods. k. Enhancement and Restoration. Wetland enhancement or restoration not associated with any other development proposal may be allowed if accomplished according to a plan for its design, implementation, maintenance and monitoring prepared by and carried out under the direction of a qualified professional. Restoration or enhancement must result in a net improvement to the functions of the wetland system. l. Wetland Restoration Project. A wetland restoration project for habitat enhancement may be allowed if: i. The restoration is approved by all agencies with jurisdiction;
ii. The restoration is not associated with mitigation of a specific development proposal; iii. The restoration is limited to revegetation of wetlands and their buffers and other specific fish and wildlife habitat improvements that result in a net improvement to the functions of the wetland system; iv. The restoration should be completed in accordance with best management practices (BMPs) and acceptable standards consistent with best available wetland science to minimize impacts to wetlands; and v. The restoration is performed under the direction of a qualified professional.
3. Wetlands – Mitigation requirements
When mitigation for wetland and/or wetland buffer impacts is required, mitigation shall meet the requirements listed in SDC 21.03.020O. in addition to the following supplementary requirements: a. Equivalent or Greater Biological Functions. Mitigation for alterations to wetland(s) and/or wetland buffer(s) shall achieve equivalent or greater biologic functions and shall be consistent with the Department of Ecology Guidance on Wetland Mitigation in Washington State (2004, Department of Ecology Publication No. 06-06- 11a and b), as such publication may be amended or revised by the Department of Ecology from time to time.
100 | Title 21: Sammamish Development Code
Effective | January 1, 2022
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