Reports, Plans, and Documents

DRAFT 2023 Stormwater Management Plan

The draft 2023 Stormwater Management Plan for Mountlake Terrace is now 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.

The Stormwater Management Plan is broken into ten sections:

  • Stormwater & Watershed 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

To provide comments, or if you have questions about the plan, please contact Laura Reed, Stormwater Program Manager, at or (425) 744-6226.

2023 SWMP front page image Opens in new window

Hall Creek Flooding and Fish Passage Technical Memo (April 2023)

This memo explains the causes and proposed fixes to flooding along Hall Creek and also covers fish passage issues.  Several options to reduce flooding are covered, including downstream impacts and costs.

216th Hall Creek flooding

Annual Stormwater Update2022 stormwater report cover picture Opens in new window

This annual report on stormwater programs, projects, and activities is published in City Happenings.

2022: Click Image to read last year's update

2023: Coming soon!

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.

Stormwater Comp Plan 2018

Read online here.