Ordinance 3666-19 - Laserfiche WebLink

quality facilities that carry and treat surface runoff from development areas. The City operates and maintains the MS4 to prevent adverse impacts from the current and past effects of land development, such as increased flow rates and stormwater pollution. Surface drainage and water quality is regulated by the Surface Water System Ordinance, Surface and Storm Drainage Ordinance, National Pollutant Discharge Elimination System(NPDES)Municipal Stormwater Permit, Stormwater Management Manual,Surface Water Comprehensive Plan,and the City's Design and Construction Standards and Specifications. Everett's current NPDES permit and regulations mandate Low Impact Development(LID)as the preferred and commonly used approach to site development.LID is a term used to describe a land development and stormwater management strategy that minimizes impervious surfaces, native vegetation loss,and stormwater runoff. Requirements include thresholds for treatment of stormwater runoff by water quality facilities and control of stormwater runoff flows by either on-site or regional storm systems that either infiltrate or detain flows before it is allowed to be released into the natural drainage system formed by streams and other drainage courses. The City also participates in the Stormwater Action Monitoring Program,a regional monitoring program for status and trends,pollutant source identification,and effectiveness monitoring to benefit all participating communities in Western Washington covered by the Municipal Stormwater Permit.Additionally,the Municipal Stormwater Permit also includes Total Maximum Daily Load(TMDL)requirements for several basins not meeting state Water Quality Standards. Besides monitoring,these TMDL requirements include actions to bring the receiving waters back into compliance with State Water Quality Standards. In the north end of Everett,stormwater runoff is collected in the combined sewer system that also collects sanitary wastewater from homes and businesses.These flows are conveyed and treated at the Everett Water Pollution Control Facility(sewage treatment plant).Overflows from this combined system into the Snohomish River and Port Gardner Bay began to be controlled under a Long Term Control Plan originally developed and approved in 1q87. In more recent years,flooding of homes and businesses during intense storm events have prompted theprogramming of improvements including the separation of stormwater from portions of the combined sewer system and construction of facilities to reduce overflows to the required average of one event per year per outfall. Programs and projects for the management of stormwater flows in the combined sewer system are provided for in the Comprehensive Sewer Plan and CSO Control Plan. Policy 2.124.1 Surface Drainage and Water Quality. Surface drainage is regulated by the Everett Surface and Storm Drainage Ordinance and the Stormwater Management Manual. In the north end of Everett,stormwater runoff is treated,along with the sanitary sewer system by the Everett Water Pollution Control Facility(sewage treatment plant). In the south end of Everett and in the unincorporated ar as of the Everett Planning Ara under the jurisdiction of Snohomish County,stormwater runoff is required to be treated by water quality facilities and detained by either on site or regional storm detention systems before it is allowed to be released into the natural drainage system formed by str ams and other drainage courses. Everett developed Drainage Basins Plans in the 198os and 199os that address stormwater issues in individ drainage basins. In 2002,Snohomish County developed Drainage Needs Reports that address stormwater irsues in urbanizing basins of Snohomish County,including Everett's Planning Ar a. a) —The City shall continue to meet the requirements of the Municipal Stormwater Permit for surface drainage and water quality to prevent and alleviate issues for : - - -: - - • : : : • : - -- problems and update drainage ordinances and program capital improvements to provide adequate drainage for the land uses planned by the Land Use Element. Policy 2.14.2 Water Quality. The City was issued its first Nationai Pcrmit,administered by the Washington State Department of Ecology,acts as an umbrella program for implementation of water quality actions in the City. Regulations and programs established or amended by the LAND USE ELEMENT, 2019 Amendment 37 Exhibit 1 -Page 37