Evaluation of Best Management Practices Maintenance Conditions

The city of Bellevue, in collaboration with Aspect Consulting, will evaluate the maintenance thresholds or conditions for the following stormwater Best Management Practices (BMPs): ponds, vaults, trenches, and tanks. Findings will suggest how permittees might adjust BMP maintenance efforts to maximize overall environmental outcomes to meet permit requirements.

Study objectives

Gather information about maintenance practices from permittees' operation and maintenance programs, and published research data.
Develop a white paper that includes the synthesis of the local and published BMP maintenance practices, and recommendations for inspection and maintenance conditions.

Study findings

Contract IAA & Scope of Work

The study will continue until April 30, 2024.

Project tasks and key deliverables

Technical Advisory Committee (TAC) and Project administration
- TAC meeting agendas and minutes: TAC#1, TAC#2, TAC#3, TAC#4, TAC#5
- Progress reports
  - 2022Q1,Q2, Q3, Q4
  - 2023 Q1, Q2, Q3, Q4
  - 2024 Q1
Survey permittees on BMP maintenance
- Technical memorandum: Survey of Municipal Stormwater Operations and Maintenance Programs
Research published BMP maintenance data
- Technical memorandum of published data analysis
Interview Ecology staff (Engineers and permit writers)
- Interview questions
- Technical memorandum
Pilot data analysis of permittee O&M data
- Technical memorandum
White paper
Communication Plan
- Presentation to SWG
- Fact sheet
- Presentation to local stormwater group

Contact information

Chelsea Morris
Stormwater Action Monitoring
chelsea.morris@ecy.wa.gov
360-764-0890

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