Environmentally Critical Areas | Environment & Sustainability
ii. There will be no adverse impact to local groundwater;
and monitoring prepared by qualified professionals, including a civil engineer and a biologist, and carried out under the direction of a qualified biologist. l. Stream and habitat restoration or enhancement may be allowed if: i. The restoration is sponsored or approved by a public agency with a mandate to do such work; ii. The restoration is unassociated with mitigation of a specific development proposal; iii. The restoration is limited to placement of rock weirs, log controls, spawning gravel, and other specific habitat improvements for resident or anadromous fish including salmonids; iv. The restoration only involves the use of hand labor and light equipment; or the use of helicopters and cranes that deliver supplies to the project site; provided, that they have no contact with critical areas or their buffers; v. The restoration is performed under the direction of qualified professionals; and vi. Stream relocation, if proposed, may be approved pursuant to subsection 2. of this section as part of an approved restoration plan. m. Roadside ditches that carry streams with salmonids may be maintained through the use of best management practices developed in consultation with relevant City, state, and federal agencies.
iii. There will be no increase in velocity;
iv. There will be no interbasin transfer of water;
v. There will be no increase in sediment load;
vi. Requirements set out in the mitigation plan are met;
vii. The relocation conforms to other applicable laws; and
viii. All work will be carried out under the direct supervision of a qualified biologist.
j. A stream channel may be stabilized if:
i. Movement of the stream channel threatens existing residential or commercial structures, public facilities or improvements, unique natural resources or the only existing access to property; ii. The stabilization is done in compliance with the requirements of SDC 21.03.020W.3.; and iii. Soft-bank stabilization techniques are utilized unless the applicant demonstrates that soft-bank techniques are not a reasonable alternative due to site-specific soil, geologic and/or hydrologic conditions. k. Replacement of existing culverts to enhance stream habitat, not associated with any other development proposal, may be allowed if accomplished according to a plan for its design, implementation, maintenance,
Effective | January 1, 2022
Title 21: Sammamish Development Code | 119
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