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. Surface water means the water that exists on land surfaces before, during and after. Additional information and standards regarding esc are available in 2009 king county surface water design manual, which has been adopted by the city. The kcswdm has been adopted to meet the requirements of the clean water act, the endangered species act and state growth management act. Whereas, the 2009 king county surface water design manual kcsdm was adopted by the city council pursuant to section 14. Wdwf integrated streambank protection guidelines, published by washington department of fish and wildlife. Section 5 pollution prevention and operation and maintenance for municipal. Stormwater wetland fact sheet in stormwater managers resource center. Clark county clean water program 3603876118, extension 4345, which can provide a list of basin plans that have been adopted. Included in the adoption of the king county manual.
Ecologys i i4 stormwater management manual for western washington, replacing the previously adopted 2009 king county surface water design manual. The city of sammamish has adopted the 2009 king county surface water design. This design scenario uses bioretention facilities sized per the 2009 king county surface water design manualkcswdm, to handle 80 percent of runoff from impervious surfaces. City of kirkland evaluates lid feasibility for each project in its capital improvement program. Chapter 1key terms and definitions 5182011 2009 surface water design manual 15 redevelopment project means a project that proposes to add, replace, or modify impervious surfaces for purposes other than a residential subdivision or maintenance on a site that is already substantially developed in a manner consistent with its current zoning or with a legal nonconforming use, or has an. January 12, 2009 overview the king county lake stewardship program kclsp has worked with volunteer monitors on green lake since 2005 to track water quality, which has been of particular interest after the alum treatment of the lake was carried out in 2004 to control phosphorus concentrations in the water column. Surface water runoff policy king county, washington. King county executive metropolitan king county council. Manual, best management practices for businesses, dated january 2009. The most significant change to the new king county manual is the addition of low impact development lid bmps called flow control bmps in the manual, which will be required for nearly all development projects within the city. January 2009 i3 king county stormwater pollution prevention manual other stormwater management requirements set forth in the king county surface water design manual. This manual is based on the 2016 king county surface water design manual. A case study and handson computer exercises will introduce the attendee to basic analytical procedures and program features. Although some of the materials in this reference section may have been adopted by administrative rule or by ordinance, the administrative rule that.
The figures in chapter 3 are reproduced, with permission, from king county s surface water design manual. Controlling flows from small projects is just as important as controlling flows from large developments. January 12, 2009 overview the king county lake stewardship program kclsp has worked with volunteer monitors on green lake since 2005 to track water quality, which has been of particular interest after the alum treatment of the lake was carried out in 2004 to control phosphorus concentrations in the water. Manual the 2009 stormwater pollution prevention manual sppm is being updated to better inform businesses and residents what they can do to protect stormwater, surface water, and groundwater quality in unincorporated king county. Previously the city retained this threshold from earlier king county manuals because this was allowed by the phase ii. Spawning salmon, meandering rivers, and clean water are important natural. To adopt the 2016 edition of the surface water design manual, which is an update to the 2009 surface water design manual to improve the clarity and cost effectiveness of its requirements and be equivalent with the states 2014 stormwater management manual for western washington. Npdes phase ii municipal stormwater permit annual report. Surface water design manual, king county, washington, january 9, 2009. City of kent maintenance standards for stormwater flow. Adopt 2016 king county surface water design manual and sammamish addendum require low impact development lid for all newreplaced impervious surfaces for all projects, including transportation prescriptive process for determining feasibility of implementing lid stricter requirements for areas within landslide hazard drainage areas. King county, washington, surface water design manual 2009 surface water design manual 192009 introduction overview king countys surface water features the rivers, lakes, wetlands, streams, and puget sound are a significant part of our natural beauty and rich heritage.
Appendix 10 equivalent programs for runoff controls for. Many king county services are continually adapting because of the covid19 pandemic. The 2009 draft update of king county stormwater pollution prevention manual sppm click here or on the title above to download the draft sppm 2. Adopted king county training and information on 2009 king county surface water designmanual. Wa dept of ecology bmps for mgmt and disposal of street wastes. Erosion and sediment control esc for small project and. Swdm signed public rule and summary of changes 20092016. Surface water management manual november 2009 city of auburn. King county, washington 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.
The 2017 surface water design manual is effective on january 1, 2017. Jun 08, 2016 surface water standards vest with the filing of a complete short plat application. This program provides support equivalent to three to five fulltime employees to road services annually. Appendix a of the swdm contains maintenance standards for flow control, conveyance and water quality facilities in kenmore equivalent to ecologys 2005 stormwater management manual for western washington. Draft 2009 surface water design manual and the stormwater pollution prevention manual. King county 2009 surface water design manual, appendix amaintenance requirements for flow control, conveyance and wq facilities. County surface water design manual and the city of kirkland addendum to the 2016 king county surface water design manual constitutes a violation of this chapter, and shall be enforced against the. All references within these codes to king county or county shall be construed to be the city of university place. King county will assume maintenance and operation of the following drainage.
The city has adopted the 2009 king county surface water design manual kcswdm. O2016428 surface water design manual city of sammamish. King county, washington this page contains links to outdated stormwater documents archived for future reference for cases where theyre referenced in municipal codes. Summary of major revisions to the 2009 stormwater pollution. Appendix 10 equivalent programs for runoff controls for new. Title 9 surface water management king county, washington. Storage and handling of flammable, combustible, and hazardous materials. The current adopted 2009 king county surface water design manual kcswdm with city amendments will no longer be in compliance with the requirements of the citys 202018 npdes phase ii permit. King county, washington, surface water design manual 2009 surface water design manual 19 2009 introduction overview king county s surface water features the rivers, lakes, wetlands, streams, and puget sound are a significant part of our natural beauty and rich heritage.
The city ofissaquah adopts the 2009 king county surace water design manual king county manual for the design, construction and maintenance of stormwater management systems and facilities that are approved though the development permt process. Cposa also provides drainage design and surface water engineering and ecological support to the road services division of the king county department of transportation. The proposed changes to the manual are seen as track changes edits. Adopted and updated its staff training program to the 2016 king county surface water design manual. Surface water design manual reference 2 city of renton. Surface water design manual update and low impact development code revisions frank blau, planning commission chair november 8, 2016. This manual, the 2009 city of kenmore stormwater pollution prevention manual, is a. October 2009 volume iii hydrologic analysis and flow control bmps 11. King county surface water management division and other local jurisdictions. Summary of changes from the 2009 manual for current and past projects still utilizing the 2009 king county surface water design manual, information regarding the 2009 manual is available here. Tacoma surface water management manual swmm as the basis for this document. These maintenance standards comply, or exceed compliance, with the. The uses of the site that would have been allowed under the 2009 surface water design manual. Stormwater management manual for western washington.
Started construction means, the site work associated with, and directly related to the. Iowa storm water management manual c18 references page 2 of 6 october 28, 2009 practices in watershed protection techniques 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. Errata to king countys 2009 surface water design manual and. Surface water design manual means the 2009 king county surface water design manual and supporting documents as appropriate, prepared by king county department of natural resources and parks or its successor organization, as supplemented and modified by the city of issaquah 2011 addendum to the. King county surface water design manual city of renton. Notice on vesting under the 2009 king county surface water. The updates are also required by king countys municipal stormwater permit in order to be equivalent with volume iv of. Ordinance 100305, approved by kenmore city council on january 11, 2010, adopted the 2009 king county surface water design manual swdm. Addendum to the king county surface water design manual.
May 15, 2018 these programs include the king county surface water design manual. Each agency will update its pages with current information. The updates are also required by king county s municipal stormwater permit in order to be equivalent with volume. Jul 26, 2016 king county, washington this page contains links to outdated stormwater documents archived for future reference for cases where theyre referenced in municipal codes. This addendum to the 2009 kcswdm defines how the requirements of the kcswdm are to be implemented within the city of sammamish. Dnrpwlrd stormwater services section sws description. Apr 24, 2016 to adopt the 2016 edition of the surface water design manual, which is an update to the 2009 surface water design manual to improve the clarity and cost effectiveness of its requirements and be equivalent with the states 2014 stormwater management manual for western washington. Manual 2009 kcswdm in order to be in compliance with its phase ii municipal. Iowa storm water management manual c18 references page 3 of 6 october 28, 2009 60. These bmps include facilities such as bioretention rain gardens, permeable pavements, dispersion, and onsite infiltration. This addendum to the 2009 kcswdm defines how the requirements of the kcswdm are to. Special report to the urban drainage and flood control district on stormwater. This addendum to the 2009 king county surface water design manual kcswdm applies to development and redevelopment proposals within the city of seatac city. Jan 01, 2019 maintenance of all drainage facilities in compliance with king county maintenance standards is the responsibility of the applicant or property owner as described in the surface water design manual, except those facilities for which king county assumes maintenance and operation as described in k.
The king county stormwater pollution prevention manual was developed to. Chapter 1key terms and definitions king county, washington. Equivalent stormwater manuals for municipal stormwater. Changes were made from the original recommendations. King county surface water management, design manual, 1998. King county surface water design manual legal definition of. Previously the city retained this threshold from earlier king county manuals because this was allowed by the phase ii permit. Swdm signed public rule and summary of changes 2009 2016. Staff recommends adopting the 2016 kcswdm with city amendments. Provided support to scout troops and other groups in installing. The 2009 surface water design manual requires the use of the runoff files methodology for sizing of flow control facilities. Pursuant to king county council adoption of ordinance 16264, the. Exemptions if you are already implementing bmps according to another federal, state, or local program, you may not have to implement the bmps in this manual. Rmc 46030 drainage surface water standards to adopt the city of renton surface water design manual 2016 king county surface water design manual as amended by the city.
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. Kcswdm means the citys adopted storm water manual that sets forth the drainage and erosion control requirements, bmps, design, and maintenance procedures and guidance for storm water management. Surface water design manual addendum preface how to use this. Cfw addendum to the kcswdm page 1 of 29 2162010 addendum to the king county surface water design manual effective date february 16, 2010. The city of sammamish has adopted the 2009 king county surface water design manual 2009 kcswdm in order to be in compliance with its phase ii municipal stormwater permit. Overflow from the bioretention facilities along with all runoff from the remaining impervious and pervious surfaces is then routed through stormwater detention facilities.
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