Environment & Sustainability | Environmentally Critical Areas
2. Streams – Permitted alterations
vii. Use of pervious material for driveway/road construction: up to 10 percent reduction in standard buffer width. viii. Restoration of on-site buffer and habitat areas, or restoration of off-site buffer and habitat areas within the same sub-basin of the impacted stream if no on- site restoration is possible: a) Up to 10 percent reduction in standard buffer width if restoration area is at a 2:1 ratio or greater; or b) Up to 20 percent reduction in standard buffer width if restoration area is at a 4:1 ratio or greater. ix. Removal of significant refuse or sources of toxic material: up to 10 percent reduction in standard buffer width. g. The use of hazardous substances, pesticides and fertilizers in the stream corridor and its buffer may be prohibited by the City. h. The introduction of livestock into a stream or stream buffer is prohibited. i. In addition to the provisions of SDC 21.03.020G., removal of any native vegetation or woody debris from the stream or stream buffer may be allowed only as part of an approved habitat management plan, critical areas study, and/or alteration plan.
Alterations to streams and stream buffers are not allowed except as provided for by complete exemptions, allowances for existing urban development and other uses, and exceptions in this chapter or as allowed for by this section. a. Alterations may only be permitted if based upon a critical areas study conducted in accordance with SDC 21.03.020K.3. that determines the proposed development will: i. Protect, restore or enhance the habitat, natural drainage, or other valuable functions of the stream resulting in a net improvement to the stream and stream buffer; ii. Design, implement, maintain and monitor a restoration or enhancement plan prepared by a qualified professional; iii. Perform the restoration or enhancement under the direction of a qualified professional; and iv. Will otherwise be consistent with the purposes of this chapter. b. The applicant shall notify affected communities and native tribes of proposed alterations prior to any alteration if a stream is in a flood hazard area and shall submit evidence of such notification to the Federal Insurance Administration. c. There shall be no introduction of any plant or wildlife which is not indigenous to the coastal region of the Pacific Northwest into any stream or buffer unless
116 | Title 21: Sammamish Development Code
Effective | January 1, 2022
Made with FlippingBook Ebook Creator