Projects going to ad after march 6, 2020 shall comply with. Redevelopment stormwater guidelines mountlake terrace. Ecology revised the swmmww in february 2005 and in august 2012. City of tacoma city of tacoma is meeting permit requirements s5. If clark countys manual references ii3, they are also referencing all the other sections within ecology s manual that ii3 references.
Low impact development technical guidance manual for puget sound, puget sound action team and washington state university pierce county extension, january 2005 or current edition. Ecology 2012 stormwater manual, as amended in 2014. On july 1st, ecology published the 2019 stormwater management manual for western washington 2019 swmmww, as well as ecologys responses to. The city of mountlake terrace has adopted the 2012 department of ecology stormwater management manual for western washington as amended in december 2014 2012 2014 ecology manual for development within the city limits. The 2012 washington state department of ecology stormwater management manual for western washington is a technical document. The clark county stormwater manual is adapted from five original sources. Hard copy and cdrom versions of the manual can be ordered from ecology. Appendix 10 equivalent programs for runoff controls for new. Ecologys 2012 swmm for western washington ecology, 2012 or an equivalent manual. Stormwater management is part of puyallups public works engineering division, managing the citys npdes municipal stormwater permit, implementing stormwater related capital projects, and providing technical assistance to other city departments. Western washington hydrology model washington state.
This is the august 2012 version of the stormwater management manual for western washington swmmww. Stormwater management manual for western washington. Under the technical information heading, you will find a link to the manual. Response to comments on the 2012 stormwater management manual. Stormwater management manual for western washington, washington state department of ecology. The 2016 stormwater management manual revisions became effective on february 1, 2016. If your project requires the use of this manual, consultation from a licensed civil engineer may be required. The 2012 stormwater management program is organized as follows.
If you have questions about ordering the stormwater manual and model program please call the department of printing at 360 5705555. Please fill out all required fields before submitting your information. The mission of the department of ecology is to protect, preserve, and enhance washingtons environment. Stormwater facilities whatcom county, wa official website. Organization of 2012 stormwater management program.
A program to prevent or reduce impacts to waters of the state caused by stormwater discharges must be developed and must address. For projects that applied under the previous regulations, the following deadlines must be met. Delete any reference to ecology s 2005 stormwater management manual for western washington. This publication provides information on the release of the 2012 stormwater management manual for western washington. Ecy issued the phase ii municipal stormwater permit for western washington npdes. The storm drainage utility operates and maintains approximately 199 miles of pipe, 10,000 catch basins and manholes, 159 stormwater facilities, 6 pump stations and 27 miles of ditch. 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. Adopt ecologys 2012 stormwater management manual for western washingtonas amended in 2014 2014 swmmww. Structural stormwater controls a program to prevent or reduce impacts to waters of the state caused by stormwater.
Ecology s stormwater management manual for western washington. For example, a facility designed in 20 would refer to the 2012 stormwater management manual. Ecology considered the comments received during the 90day comment period and issued the final 2012 swmmww on august 1, 2012. Control of runoff from new development, redevelopment and construction sites. Guidance on low impact development lid requirements for new development and redevelopment. How to find the stormwater manual and model program on the internet the stormwater management manual for eastern washington and the model municipal. The department of ecology reissued the permit, on april 5, 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. You may also go to the agc education foundation website and navigate to. Surface water engineering training city of bellevue. 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. Response to comments on the 2012 stormwater management. Wwhm 2012 trainings available for a fee for information on training classes on western washington hydrology model wwhm2012 please contact dan morris at the agc education foundation at 2062844500.
The requirements under section s6 of the stormwater management program for secondary permittees, calls for each permittee to develop and implement a stormwater management program swmp and prepare written documentation for submittal to ecology on march 31, 2008. Permit and reporting information system paris contains stormwater compliance monitoring information. The 2012 state department of ecology stormwater management manual for western washington can be accessed from ecology s stormwater information website. Stormwater manuals washington state department of ecology. Under the 2009 permit, all county development projects including those located in other jurisdictions must comply with the countys equivalent manual if it is more stringent than. It made low impact development principles and best management practices the preferred and commonly used approach for development. The county must use drainage design and source control rules equivalent to those in ecologys 2005 stormwater management manual for western washington 2005. Surveys on the volumes in the manual ecology sent out surveys specific to. At the workshops, ecology explained the proposed changes to the manual and answered questions. Supplemental manual to the ecology stormwater management. Wsdot revised the hrm to maintain equivalency with the department of ecologys stormwater management manuals. This is the july 2019 version of the stormwater management manual for western washington swmmww.
Ecologys stormwater management manual for western washington. The city of mountlake terrace has adopted the 2012 department of ecology stormwater management manual for western washington as amended in december 2014 20122014 ecology manual for development within the city limits. 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. Aug 01, 2012 the washington state department of ecology has released the revised stormwater management manual for western washington swmmww. Cowlitz county stormwater drainage manual june 2017 1 1. National pollutant discharge elimination system, effective august 1, 20 through july, 2018, which requires local governments like skagit county to adopt the 2012 department of ecology stormwater management manual for western washington 2012 manual.
Comprehensive drainage plan refers to a detailed analysis for each drainage basin which compares the capabilities and needs for runoff accommodation due to various combinations of development, land use, structural and nonstructural management alternatives. Since 2005, ecology has reissued or issued for the first time all of these npdes stormwater permits. Coa supplemental manual to the ecology stormwater management manual for western washington volume iv source control bmps version 1 2 chapter 1. The 2012 stormwater management manual is applicable to projects vested beginning february 1, 2012 to january 7, 2016. Request a copy, the mission of the department of ecology is to protect. Washington state department of ecology water quality program. Welcome to the online, interactive 2012 stormwater management manual for. Skagit county has adopted ecologys 2012 stormwater management manual for western washington, as amended in december 2014, as the stormwater management manual for the entirety of unincorporated skagit county, except the npdes permit area. Volume ii construction stormwater pollution prevention august 2012. The 2012 state department of ecology stormwater management manual for western washington can be accessed from ecologys stormwater information.
Areas outside of npdes phase ii areaslake whatcom, lake. Updates are required by the washington state department of ecology, typically on a fiveyear cycle. The city of tacoma stormwater management manual was deemed equivalent to ecologys 2012 swmmww. Stormwater management manual for eastern washington. The 2012 state department of ecology stormwater management manual for western washington can be accessed from ecologys stormwater information website. Go to our stormwater permittee guidance page to learn more about applying, changing, implementing, and complying with your stormwater permit. Bmps for surrounding the activity area with a curb, dike, or berm or elevating the activity. Construction stormwater pollution prevention august 2012 ii. Coa supplemental manual to the ecology stormwater management manual for western washington volume iv source control bmps version 1 ii s451.
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 beneficial uses of the receiving waters. The city is currently updating its swmm to obtain equivalency with ecologys 2012 swmm for western washington. Selection of operational and structural source control bmps o section 2. To help us meet that goal, please consider the environment before you print or request a copy. Single family residential stormwater management guidelines. The 2012 stormwater management manual for western washington is available. For all medium intensity development as listed above, a stormwater design which is consistent with all applicable minimum requirements of the 2012 washington state department of ecology stormwater management manual for western washington will be required if the project proposes. The 2012 stormwater management manual for western washington can be downloaded at ecologys website.
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