The Stormwater Facility Maintenance Manual (PDF) provides basic guidelines to help support the maintenance covenant requirement. Erosion is a natural process that can be accelerated by human activity. This document is available at . The City of Redmond As of January 2014, stormwater facilities, systems and LID features are required to have a stormwater maintenance agreement that identifies who is responsible for the operation and maintenance of the system or LID components. Washington Department of Ecology (Ecology) 2014 Stormwater Management Manual for Western Washington (SWMMWW) for the design, construction and maintenance of stormwater management systems and facilities that are approved through the development permitting process. Stormwater Management Manual for Western Washington (2014 Update) The City of Lake Stevens uses the 2014 updated version of the 2012 Stormwater Management Manual for Western Washington. Stormwater Management Manual for Western Washington as amended in 2014 (2014 SWMMWW) and the City of Redmond 2019 Stormwater Management Technical Notebook (STN). Issaquah Stormwater Design Manual Addendum to the 2014 Stormwater Management Manual for Western Washington. STORMWATER SITE PLAN _____ Terraforma Design Group, Inc. SUMMARY OF MINUMUM REQUIREMENTS 10 Minimum Technical Requirements as provided within Vol. This requirement originated with the issuance of the latest Western Washington Phase . Marysville City Hall 1049 State Avenue Marysville, WA 98270 Phone: 360-363-8000 Fax: 360-651-5033 This version is a revision of the 2014 SWMMWW. In fall of 2017, Ecology announced they will be extending the existing permit from expiration in 2018 New and re-development projects must follow new design requirements which are now often triggered with just a Single Family Residence project. 2013-2018 NPDES Phase II Permit; 2015 WSDOT Specifications; 2014 WSDOT Highway Runoff Manual; 2012 LID Manual; 2012 Stormwater Management Manual for Western Washington 2012 stormwater management manual for western Washington as amended in December 2014 (Vol. NOTES MR1 and MR2 The requirements of MR1 (Stormwater Site Plan) and MR2 3. Construction Updated Stormwater Manual- Adopt the 2014 Stormwater Management Manual for Western Washington. Western Washington 2012/2014 Stormwater Management Manual for Western Washington (2014 version includes maintenance tables for bioretention and permeable pavement) The Notebook may be modified in 2019 in anticipation of upcoming permit and SWMMWW changes. Stormwater Management Manual for Western Washington (SWMMWW) provides additional guidance Efforts have been underway to further develop these "low impact development" concepts in Western Washington. Rain Garden Handbook. On May 1st, 2009, the City of Shoreline implemented new surface water code that requires Low Impact Development (LID) for projects that disturb soils or add, replace, or create impervious surfaces. are deemed equivalent to Ecology's stormwater management manuals. Adopted Stormwater Manual for Design The City of Mill Creek uses the 2014 Revision of the 2012 Department of Ecology Stormwater Management Manual for Western Washington. The objective of this manual is to provide guidance on the measures necessary to control the quantity and quality of stormwater produced by new development and redevelopment, such that they comply with water quality standards and contribute to the protection of receiving waters. Construction Stormwater General Permit **Even if a construction permit has been approved and issued. Stormwater Maintenance Agreement. Kitsap County Departments of Public Works and Community Development have collaboratively embarked on a review and update process, with the assistance of a consulting firm. The July 2021 Stormwater Management Manual is applicable to the following projects: All complete applications submitted one or after July 1, 2021. One option offered by Ecology allows local jurisdictions to develop their own . Resource List - Advanced Longterm LID Operations: Bioretention Western Washington 2012 (Amended 2014) Stormwater Management Manual for Western Washington 2013 - 2018 (2014 modification) Western Washington Phase II and Phase I Permit references to the 2014 Stormwater Management Manual for Western Washington S5.C.5.d N/A Clean catch basins if the inspection indicates cleaning is needed to comply with maintenance standards established in the SWMMWW. Updated Stormwater Manual- Adopt the 2014 Stormwater Management Manual for Western Washington. "Minimum requirements" means the minimum requirements for stormwater management described in the NPDES Phase II permit. Management Manual for Western Washington, as amended in December 2014, as the Stormwater Management Manual for the entirety of unincorporated Skagit County. The City's standards for Right-of-Way, Stormwater, and Grading and Clearing are found in: Title 12, Title 13, and Title 15 of the Mukilteo Municipal Code; Mukilteo Development Standards (Amended 2019) Mukilteo Development Standards (2017) Stormwater - 2012 Stormwater Management Manual for Western Washington (Amended 2014, WA DOE) Stormwater . Beginning January 1st, 2018 this package will be required for single-family homes that create and/or . Other criteria or exemptions may apply. 40. Acknowledged in Section D1-01 "General" that the city has adopted the 2014 state stormwater manual. Insight Engineering Co. - Stormwater Site Plan 11/23/2021 - 5 - 2014 SWMMWW MINIMUM REQUIREMENTS SUMMARY MR : MINIMUM REQUIREMENT SSP : STORMWATER SITE PLAN MR #1 PREPARATION OF STORMWATER SITE PLAN: Stormwater site plan follows 2014 Stormwater Management Manual for Western Washington. Management Manual for Western Washington, as amended in December 2014, as the Stormwater Management Manual for the entirety of unincorporated Skagit County. This caused a major reorganization of the surface water engineering standards. This permit is for a five-year period expiring on July 31, 2018, when it is expected that Ecology will issue a revised permit. Note that these field tests generally provide a saturated hydraulic conductivity combined with a hydraulic gradient (see Darcy's Law, Equation 4D-8). In fall of 2017, Ecology extending the existing permit from expiration in 2018 to August of 2019. The training will provide an overview of the 2017 standards -- revised since the city adopted a 2014 amendment to the state Department of Ecology Stormwater Management Manual for Western Washington. Earthwork standard requirements are in the PDF file under "Content". This fact sheet is intended to be used for informational purposes only. Requirements for governments using equivalent stormwater manuals June 13, 2022, 9 a.m., Online webinar. The nine (9) minimum requirements are: 1. 5.6 "Surface Water Design Manual" means the manual, and supporting documentation referenced or incorporated in the manual, describing surface water and stormwater design and analysis requirements, procedures and guidance. Our new stormwater manual will provide users a one-stop shop for all necessary regulatory information, along with design and maintenance standards and information tailored . Department of Ecology's 2012 Stormwater Management Manual for Western Washington (SWMMWW), as amended in 2014, and requires actions that are as or more protective than the provisions detailed in the SWMMWW. Snohomish County Drainage Manual Volume II - Construction Stormwater Pollution Prevention 3 Sheet Erosion: The removal of a layer of exposed soil by the action of raindrop splash and runoff, as water moves in broad sheets over the land and is not confined in small depressions. stormwater management manuals, one for Eastern Washington and one for Western Washington. Preparation of Stormwater Site Plans 2. A. Stormwater Management Manual Adopted: The Department of Ecology 2012 "Stormwater Management Manual for Western Washington" as amended in 2014, together with the 2019 City of Orting Stormwater Management Manual Amendment, are is hereby adopted by reference, as though fully set forth herein, as the Stormwater Management Manual for the City of . On-site Stormwater Management 6. August 1, 2017 Municipal Operations and Maintenance Inspect all municipal catch basins at least once by August 1, 2017, and every two years thereafter. This document, the City of Issaquah 2016 Stormwater Design Manual other larger western Washington jurisdictions in August 2012 with an effective date of August 1, 2013. The full SWMMWW Click the image to the left to go to document's homepage on the Department of Ecology's website. MR1 and MR2 The requirements of MR1 (Stormwater Site Plan) and MR2 Information in these pages provide guidance on stormwater management requirements for projects within the . All six Phase I permittees (Snohomish, King, Pierce, and Clark counties, and the cities of Seattle and Tacoma) submitted draft codes and manuals to Ecology for review. Proper management of stormwater runoff will minimize damage to public and private property, reduce the effects of development on land and stream channel erosion and sedimentation, assist in the attainment and maintenance of water quality standards and reduce flooding. Beginning January 1st, 2018 this package will be required for single-family homes that create and/or . City Stormwater Regulations. Development Division, Design Office . For assistance with any of these compliance issues or recommendations regarding BMPs, please see the 2014 Stormwater Management Manual for Western Washington (SWMMWW), Volume II, Construction Stormwater Pollution Prevention which includes BMPs for Source Control and Runoff Conveyance and Treatment BMPs. Control Manual . Other design criteria requirements are an overflow structure, adequate separation from ground water and that an im ported bioretention soil mix be 18" in depth to provide enhanced treatment of runoff. AN INTERESTING RIDE (2014 Stormwater Management Manual for Western Washington) by David Baumgarten Navigating Minimum Requirement #5, List #1, & List #2 can be an interesting and at the same time frustrating ride. chapter 2.98 and is 2014 Stormwater Management Manual for Western Washington. 2019 Engineering Development Manual and in the 2014 Stormwater Management Manual for Western Washington. Our staff evaluated the submittals for equivalency with the 2019 Stormwater Management Manual for Western Washington, and worked through revisions with permittees. Calendar of hands-on volunteer opportunities. The description below . The "Surface Water Design Manual" is formally adopted by rule under the procedures in K.C.C. A s such, Kitsap County is mandated to update it's Stormwater Design Manual and relevant development codes for consistency. Note: Use the 2014 amended Department of Ecology document.