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  • CITY OF BURIEN AGENDA BILL

    Agenda Subject: Adoption of the Storm Drainage Master Plan Meeting Date: August 6, 2012

    Department: Public Works Attachments: 1) Storm Drainage Master Plan

    Fund Source: N/A Activity Cost: N/A Amount Budgeted: N/A Contact: Maiya I. Andrews,

    Public Works Director Telephone: (206) 248-5521 Adopted Work Plan Priority: Yes X No__.

    Work Plan Item Description: Adoption of Storm Drainage Master Plan

    PURPOSE/REQUIRED ACTION: The purpose of this agenda item is to present and adopt the Storm Drainage Master Plan (SDMP). BACKGROUND (Include prior Council action & discussion): The last SDMP was adopted by Council in May 2005. It is being updated in order to:

    Ensure compliance with the National Pollution Discharge Elmination system (NPDES); Ensure program operational needs are met; Identify maintenant needs; Address local drainage, flooding and water quality issues; and Update the Capital Projects list.

    The draft includes recommended increases to the Citys stormwater fee to provide the staffing and equipment necessary to comply with the new NPDES requirements in the coming year. Updated Info: The attached draft incorporates the minor changes requested by Council at its July 16, 2012 meeting. Those changes are:

    Acknowledgements page: Changed "Major" to "Mayor". Page 2-4: Changed to 3.2 square miles and 17,000 residents. Page 3-12: Inserted sentence about the "Puget Sound Action Area". Page 3-12: Inserted graphic. Page 3-13, 3-14: replaced pages due to edits on page 3-12.

    OPTIONS (Including fiscal impacts): N/A

    Administrative Recommendation: Staff recommends approval of the motion to adopt this plan.

    Committee Recommendation: N/A Advisory Board Recommendation: N/A

    Suggested Motion: I move to adopt the City of Burien Storm Drainage Master Plan (July 2012).

    Submitted by: Maiya I. Andrews, Public Works Director Administration __________ City Manager ___________ Todays Date: July 30, 2012 File Code: R:\CC\Agenda Bill 2012\080612pw-1 SDMP Adoption.docx

  • Acknowledgements

    City of Burien, Washington Storm Drainage Master Plan

    City Council

    Brian Bennett, Mayor Rose Clark, Deputy Mayor

    Jack Block Joan McGilton

    Lucy Krakowiak Gerald Robinson

    Bob Edgar

    City Manager Mike Martin

    Public Works Department

    Maiya Andrews, Public Works Director Heungkook Lim, Surface Water Management Engineer

    Malissa Phok, Right of Way Inspector Samir Basmeh, Maintenance Manager Jeff Heglund, Maintenance Worker

    Prepared by Otak, Inc.

    Alissa Maxwell Jessica Christofferson

    Jeremy Andrews 10230 NE Points Drive, Suite 400

    Kirkland, WA 98033

  • City of Burien Storm Drainage Master Plan

    Table of Contents

    City of Burien Storm Drainage Master Plan i

    Acknowledgements

    Abbreviations and Acronyms

    Executive Summary Background ............................................................................................................................. ES-1Purpose of the Study .............................................................................................................. ES-1Stormwater Program Considerations .................................................................................. ES-2Stormwater Program Assessment ........................................................................................ ES-4Capital Needs .......................................................................................................................... ES-6Watershed Enhancement Program ...................................................................................... ES-7 Stormwater Program Funding .............................................................................................. ES-7

    Section 1: Introduction and Overview Background ................................................................................................................................ 1-1 Stormwater Program Purpose and Mission ........................................................................... 1-1 Stormwater Program History ................................................................................................... 1-3Organization and Staffing ........................................................................................................ 1-4Existing Infrastructure .............................................................................................................. 1-4 Overview of the Stormwater Management Planning Process ............................................ 1-4

    Figure 1-1: Vicinity Map

    Section 2: Characterization of the Study Area Service Area ................................................................................................................................ 2-1 Drainage Basins ......................................................................................................................... 2-1

    Adjacent and Downstream Drainages ............................................................................. 2-1 Hydrologic Characteristics ....................................................................................................... 2-3

    Climate ................................................................................................................................. 2-3Topography ......................................................................................................................... 2-3Geology ................................................................................................................................ 2-4Critical Areas (Sensitive Areas, Steep Slopes, Wetlands, Floodplains) ....................... 2-4Land Use ............................................................................................................................. 2-4

  • ii City of Burien Storm Drainage Master Plan

    Study Area Considerations........................................................................................................ 2-4 Lake Burien Water Quality ................................................................................................ 2-4 Arbor Lake Water Quality ................................................................................................. 2-7 Miller/Walker Creek Watershed ...................................................................................... 2-7 Closed Depressions ............................................................................................................. 2-8

    Figure 2-1: Major Drainage Basin Map Figure 2-2: Major Drainage Basins with Geology Map Figure 2-3: Sensitive/Critical Areas Map

    Table 2-1 Drainage Basin Areas Within City Limits

    Section 3: Stormwater Program Analysis Analysis Structure ....................................................................................................................... 3-1NPDES Phase II Municipal Stormwater Permit ................................................................... 3-2

    Permit Timeline ................................................................................................................... 3-2Public Education and Outreach (S5.C.1) ......................................................................... 3-3

    Program Implementation ............................................................................................ 3-4 Public Involvement and Participation (S5.C.2) ............................................................... 3-4

    Program Implementation ............................................................................................ 3-4 Illicit Discharge Detection and Elimination (S5.C.3) ..................................................... 3-4

    Program Implementation ............................................................................................ 3-5 Controlling Runoff from New Development, Redevelopment, and Construction Sites (S5.C.4) ........................................................................................................................ 3-6

    Program Implementation ............................................................................................ 3-6 Pollution Prevention and Operation and Maintenance for Municipal Operations (S5.C.5) .................................................................................................................................. 3-7

    Contracted Maintenance Services .............................................................................. 3-7 Inspections .................................................................................................................... 3-7 Stormwater System Maintenance ............................................................................... 3-7 Complaint Response .................................................................................................... 3-8 Minor Surface Water Improvements ......................................................................... 3-8 Pollution Prevention .................................................................................................... 3-8 Recordkeeping .............................................................................................................. 3-9Program Implementation ............................................................................................ 3-9

    Total Maximum Daily Loads (S7) ..................................................................................... 3-9 Program Implementation ............................................................................................ 3-9

    Monitoring (S8) .........