Title 17E Environmental Standards
Chapter 17E.060 Shoreline Regulations
Article V. General Requirements for Shoreline Use and Modifications: Part IV. General Requirements for Shoreline Modifications
Section 17E.060.440 Jetties, Groins, and Weirs
- Definitions.
Jetties are elongated artificial obstructions projecting into a stream from the bank to control shoaling or scour by deflection of current. Groins are bank of shore-protection structures in the form of a barrier oblique to primary motion of water, designed to control movement of bed material. Weirs are structures in a stream or river for measuring or regulating stream flow.
- Jetties, groins, and weirs located waterward of the ordinary high-water mark shall be allowed only where necessary to support water-dependent uses, public access, shoreline stabilization, or publicly owned and/or maintained projects which do not degrade natural channel morphology or river processes, or cause adverse impacts to aquatic and terrestrial wildlife.
- Jetties, groins, weirs, and similar structures are allowed by a shoreline conditional use permit, except for those structures installed to protect or restore ecological functions, such as woody debris installed in streams.
- Jetties, groins, and weirs shall be designed to protect critical areas and shall provide for mitigation according to the sequence defined in SMC 17E.060.220.
Date Passed: Monday, June 21, 2010
Effective Date: Monday, July 26, 2010
ORD C34605 Section 8