Reports, Plans, and Documents

2021 Stormwater Management Plan for Mountlake Terrace

The 2021 Stormwater Management Plan for Mountlake Terrace is available. The City updates this plan annually to improve water quality in local creeks, Lake Ballinger, Lake Washington, and Puget Sound; and also to comply with requirements of the Western Washington Phase II Municipal Stormwater Permit (Permit.)  

The Stormwater Management Plan is broken into ten sections:

  • Stormwater Planning
  • Public Education and Outreach
  • Public Involvement and Participation
  • Mapping and Documentation
  • Illicit Discharge Detection and Elimination
  • Controlling Runoff from New Development, Redevelopment, & Construction Sites
  • Operations and Maintenance
  • Source Control Program for Existing Development
  • Compliance with Total Maximum Daily Load Requirements
  • Monitoring and Assessment

For questions about the plan, please contact Laura Reed, Stormwater Program Manager, at lreed@mltwa.gov or (425) 744-6226.


Stormwater Comprehensive Plan 

The Final Mountlake Terrace 2018 Stormwater Comprehensive Plan Update (PDF) is now available.  The Comprehensive Stormwater Plan (Plan) provides guidance for the design, construction, management, and maintenance of the City’s storm system to meet future needs. The Plan also provides information about the City’s existing stormwater infrastructure, current operations and maintenance, regulatory requirements, and funding.   Deficiencies were identified, and a recommended course of action developed to resolve them. It was created in partnership with the 2015 City of Mountlake Terrace Comprehensive Plan and other planning documents adopted by City Council, to ensure a common vision for the future. City Council approved the plan in February 2019.

Watershed Documents

Annual Reports to the Washington State Department of Ecology

  1. 2007 Mountlake Terrace Stormwater Summary Report
  2. 2008 Mountlake Terrace Stormwater Summary Report
  3. 2009 Mountlake Terrace Stormwater Summary Report
  4. 2010 Mountlake Terrace Stormwater Summary Report
  5. 2011 Mountlake Terrace Stormwater Summary Report
  6. 2012 Mountlake Terrace Stormwater Summary Report
  7. 2014 Mountlake Terrace Stormwater Summary Report
  1. 2015 Mountlake Terrace Stormwater Summary Report
  2. 2016 Mountlake Terrace Stormwater Summary Report
  3. 2017 Mountlake Terrace Stormwater Summary Report
  4. 2018 Mountlake Terrace Stormwater Summary Report
  5. 2019 Mountlake Terrace Stormwater Summary Report
  6. 2020 Mountlake Terrace Stormwater Summary Report
  7. 2021 Mountlake Terrace Stormwater Summary Annual Report

Stormwater Management Plans

  1. 2008 Mountlake Terrace Stormwater Management Plan
  2. 2009 Mountlake Terrace Stormwater Management Plan
  3. 2010 Mountlake Terrace Stormwater Management Plan
  4. 2011 Mountlake Terrace Stormwater Management Plan
  5. 2012 Mountlake Terrace Stormwater Management Plan
  6. 2014 Mountlake Terrace Stormwater Management Plan
  1. 2015 Mountlake Terrace Stormwater Management Plan
  2. 2017 Mountlake Terrace Stormwater Management Plan
  3. 2018 Mountlake Terrace Stormwater Management Plan
  4. 2019 Mountlake Terrace Stormwater Management Program
  5. 2020 Mountlake Terrace Stormwater Management Plan
  6. 2021 Stormwater Management Plan for Mountlake Terrace

Other Stormwater Plans

  1. 2008 Swamp Creek TMDL/NPDES II Annual Report Status Summary (PDF)
  2. 2009 Swamp Creek TMDL NPDES II Annual Report Status Summary (PDF)
  3. 2010 Swamp Creek TMDL NPDES II Annual Report Status Summary (PDF)
  1. 2011 Swamp Creek TMDL NPDES II Annual Report Status Summary (PDF)
  2. 2012 Swamp Creek TMDL NPDES II Annual Report Status Summary (PDF)
  3. Town Center Regional Stormwater Facility Drainage Area Map (PDF)