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PART 000 General.
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(1) The purpose of this chapter is to regulate stormwater discharges from all new development and redevelopment to prevent and control adverse impacts of drainage and stormwater on the public health, safety, and general welfare, consistent with the provisions of the Federal Clean Water Act (33 U.S.C. § 1251 et seq.) as administered by the Washington State Department of Ecology through issuance of the National Pollutant Discharge Elimination System (NPDES) Phase I Municipal Stormwater Permit (Permit) in accordance with chapter 90.48 RCW.

(2) The objectives of this chapter are:

(a) To promote sound, practical and economical development practices and construction procedures which prevent or minimize impacts to the county’s waters;

(b) To prevent or minimize degradation of water quality and to control the sedimentation of streams, rivers, lakes, wetlands, marine waters and other waters to the maximum extent practicable by all known and reasonable methods of prevention, control and treatment;

(c) To control stormwater runoff originating from new development or redevelopment;

(d) To preserve the quality of water for recreation and fish and wildlife habitat;

(e) To maintain aquatic habitat;

(f) To maintain the quality of the county’s water resources;

(g) To prevent or minimize adverse effects caused by degradation of surface water quality flow patterns or quantities, locations, and changes to hydrologic flow patterns;

(h) To prevent groundwater degradation from surface water flows;

(i) To preserve and protect the county’s wetlands by maintaining hydrologic continuity with other aquatic resources;

(j) To maintain the safety of county roads and rights-of-way;

(k) To protect and maintain the safety and reliability of public and private electric systems to federally mandated standards;

(l) To protect public safety by reducing soil erosion, slope instability, and landslides;

(m) To encourage new development and redevelopment to locate within urban growth areas;

(n) To promote non-structural preventative and source control activities and actions;

(o) To require the use of low impact development (LID) best management practices (BMPs) as directed by the Drainage Manual; and

(p) To require and promote site planning principles that make LID the preferred and commonly-used approach to site development. (Added by Amended Ord. 10-026, June 9, 2010, Eff date Sept. 30, 2010; Amended by Ord. 15-102, Jan. 11, 2016, Eff date Jan. 22, 2016; Amended by Amended Ord. 17-070, Nov. 1, 2017, Eff date Dec. 1, 2017).