King county, washington this page contains links to outdated stormwater documents archived for future reference for cases where theyre referenced in municipal codes. Stormwater management manual for western washington. Issaquah creek basin and nonpoint action plan, king county surface water management. Stormwater documents king county king county, washington. Our stormwater manuals provide stormwater permit implementation and management. Surface water design manual king county, washington. The 2016 stormwater pollution prevention manual sppm provides best management practices bmps for managing stormwater on commercial, multifamily and residential properties. Clark county stormwater manual 2015 i introduction to the manual.
Whereas, in 2009, the black diamond city council adopted the washington state department of ecologys 2005 stormwater management manual for western washington 2005 swmmww as the stormwater standards for the city of black diamond. The washington state department of ecology gratefully acknowledges the valuable time, comments, and expertise provided by the people listed below who contributed to the 2012 revision of vol. Per requirements in king countys phase 1 municipal stormwater permit effective date august 1, 20, projects permitted under earlier versions. The thurston county drainage design and erosion control manual ddecm establishes requirements and provides guidance on measures necessary to control the quantity and quality of stormwater runoff produced by development and redevelopment such that they comply with. Volume ii of this stormwater management manual is entirely devoted to stormwater effects and controls associated with. City of kent maintenance standards for stormwater flow control, conveyance, and water quality facilities catch basininletmanhole maintenance component condition when maintenance is needed result expected after maintenance is performed access access and opening any blocking of access to or inletting capacity of basin by more than 10%. Surface water drainage requirements city of shoreline. As of february 2014, the following basins in thurston county have adopted basin plans. This section of the water and land resources division is responsible for coordinating the county s compliance with state and federal stormwater management regulations that protect water quality and for implementing a variety of stormwater management programs integral to this compliance as well as to the protection. Thurston county drainage design and erosion control manual. Pursuant to king county council adoption of ordinance 18257, the department of natural resources and parks adopted a public rule revising the king county surface water design manual swdm. In addition, both the 2019 draft of the western washington phase ii municipal stormwater permit and. The 2016 king county surface water design manual has been approved by the. Stormwater documents king county, washington surface water design manual 2 016 requirements and standards for designing surface and storm water management systems in king county to mitigate the impacts of new development and redevelopment on natural and existing manmade drainage systems.
The advisory groups met in 2009 and 2010 and provided. In the stormwater management manual for western washington excerpted from the washington state department of ecologys stormwater management manual for western washington, vol. How to find the stormwater management manual on the internet the stormwater management manual for western washington is also available on ecologys stormwater homepage. Focus on stormwater management manual for western washington from ecologys water quality program the department of ecology ecology has published an update to its stormwater management manual for western washington. In 1998, king county promulgated a stormwater technical manual and associated regulations. Drainage design and erosion control manual thurston county. Focus on stormwater management manual for western washington. Stormwater management manual for western washington ecology, 2012 washington state department of transportation wsdot highway runoff manual wsdot, 2014 washington state department of transportation hydraulics manual wsdot, 2015 washington department of fish and wildlife wdfw hydraulic project approval hpa requirements. Programs equivalent to the 2014 stormwater management manual for western washington. Seattle dpd stormwater best available science seattle. The modified western washington phase ii municipal stormwater permit and 2014 ecology stormwater management manual are available on ecologys website. Auburn surface water management manual swmm consists of the department of ecologys 2014 stormwater management manual for western washington swmmww with supplemental requirements supplemental manual specific to the city of auburn.
The 2009 king county surface water design manual kcswdm and city of renton amendments to the 2009 kcswdm is. Phase i permits contain additional requirements for water quality monitoring and retrofits. Under the 2009 permit, all county development projects including those located in other. Clark county pollution control manual, published by.
The state of washington was a coplaintiff and partner in these settlements. The city adopts the stormwater design manual, based on ecologys i i4 stormwater management manual for western washington, replacing the previously adopted 2009 king county surface water design manual. Pursuant to king county council adoption of ordinance 16264, the department of natural resources and parks adopted a public rule revising the king county surface water design manual swdm. Excerpted from ecologys stormwater management manual for western washington 2014. Ecology doe stormwater management manual for western. City of kent maintenance standards for stormwater flow.
About the manual adoption of the practices contained in the manual will lead to better management of parklands, waterways, estuaries, wetlands and oceans and will help. Iv of the stormwater management manual for western washington swmmww. Stormwater management manual for western washington 2014, volume i minimum. Stormwater pollution prevention manual king county. Swdm signed public rule and summary of changes 20092016. If you have questions about ordering the stormwater manual, please call the department of printing at 360 7536820. Equivalent stormwater manuals for municipal stormwater. Mar 02, 2015 in may 2014, dpd published the draft 2015 city of seattle stormwater code and stormwater manual, volumes 1 through 5, and the appendices. Code update effort seattle 2009a, 2009b, the technical and policy.
An accurate count of washington residents will ensure the fair distribution of political representation and of federal and state resources. To adopt the 2016 edition of the stormwater pollution prevention manual, which is an update to the 2009 stormwater pollution prevention manual to improve clarity and be equivalent with the states 2014 stormwater management manual for western washington. Draft 2009 surface water design manual and the stormwater pollution prevention manual. To provide information on the multiple objective approaches of stormwater management, the department of water published the stormwater management manual for western australia. Ii of the stormwater management manual for western washington swmmww. Jon cassidy king county, department of transportation ron devitt dept. Volume iv source control bmps december 2014 ii acknowledgements the washington state department of ecology ecology gratefully acknowledges the valuable time, comments, and expertise provided by the people listed below who contributed to the 2012 revision of vol. The 2009 king county stormwater pollution prevention manual was developed by king county and adopted for use within unincorporated king county in january 2009. City of issaquah 2017 stormwater design manual addendum 2 p a g e new technical manual. The washington state department of ecology offers grants for projects to improve water quality and quantity in watersheds through retrofitting areas with green stormwater infrastructure. The protective design standards are found in the state stormwater manual, first adopted in 1992 and updated in 2005 for western and eastern washington.
This manual is an update to the 2009 ddecm, which was adopted by. Please fill out all required fields before submitting your information. Dnrpwlrd stormwater services section sws description. Stormwater management manual for western washington december 2014. The project objective is to update the king county surface water design manual kcswdm to achieve equivalency with ecologys 2012 stormwater management manual for western washington smmww as required by the 202018 npdes phase 1 municipal stormwater permit. Stormwater management manual for western washington volume ii construction stormwater pollution prevention. The stormwater npdes permit sections s4 and s5 states. Western washington stormwater management manual 2012. Stormwater pollution prevention manual 2016 guide describing best management practices for businesses, residents, managers, and owners of property in unincorporated king county to apply to reduce the contamination of stormwater, surface water, and groundwater. Runoff treatment bmps, chapter 5, pages 58 to 511 or pages 105 to 108 in the online pdf file as revised december 2014. The project is partially supported by a national estuary. Stormwater management manual for western washington, the.
Stormwater management manual for western washington ecology manual by the. Washington state department of ecology water quality program. On may 1st, 2009, the city of shoreline implemented new surface water code that. Ecologys stormwater management manual for western washington. This manual, the 2009 city of kenmore stormwater pollution prevention manual, is a modified version of that king county manual. The washington state department of ecology is solely responsible for any. King county surface water design manual update project. Archived stormwater documents king county, washington. The manual represents ecologys latest guidance on strategies to prevent and reduce the harms of stormwater pollution. Per the city of rentons national pollutant discharge elimination system npdes permit, it is required to adopt updated surface water design standards that are equivalent to portions of volume 1 of the 2012 stormwater management manual for western washington, as amended in 2014, by december 31, 2016.