Los Angeles County-Wide Structural BMP
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To date, there has been no analytically-based and comprehensive County-wide effort to optimize the selection and implementation of structural water quality Best Management Practices (BMPs). Retrofit structural BMPs were primarily selected and installed in an opportunistic, site-specific fashion, often focusing on only one specific pollutant (or source), regulatory requirement, or local funding opportunity. There had been little effort to regionally optimize structural BMP selection and implementation, particularly to meet regional goals. The County of Los Angeles, City of Los Angeles, and Heal the Bay recognized this need and combined resources and successfully secured grant funding to develop sound and defensible analytical tools to meet this gap in knowledge. Geosyntec was retained to be the Technical Consultant for this Project.

Geosyntec's Scope of Services

Working with the key group of client representatives, Geosyntec developed a comprehensive methodology for using geographic information system (GIS) methodologies to prioritize implementation of structural BMPs throughout Los Angeles County. Our goal was to maximize the return of expenditures for structural BMPs implemented - and build consensus among stakeholders during this process. The structural BMPs selected for implementation will treat urban runoff in a manner that maximizes pollutant reductions for multiple contaminants and will improve water quality in a cost-effective manner.

The project demonstrated the use and benefits of this methodology by applying it to one of the watersheds in the County. The final product of the project was be a comprehensive, detailed blueprint for implementing structural BMPs in the Ballona Creek Watershed.

Notable Accomplishments:

The methodology was successful in its process which resulted in consensus and participation from influential members of the regulated, regulatory, and environmental communities. The resulting work product was publicly presented by Geosyntec to over 200 stakeholders and agencies; and the work spurred so much interest that subsequent phases were funded by the State and local agencies. These new phases will commence in 2007. The project received the Metropolitan Los Angeles Branch of the American Society of Civil Engineers award for 2006 Outstanding Civil Engineering Project in the Public/Private Sector.

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Project Summary

  • Location: Los Angeles, California, USA
  • Client: Heal the Bay, City of Los Angeles, and County of Los Angeles
  • Project Practice Areas: Water and Natural Resources
  • Type of Facility: Area Planning
  • Services Provided: Water Quality and Watershed Planning and Implementation Support; Watershed Prioritization; GIS-Based Analysis Tools; BMP Selection and Evaluation; Public and Stakeholder Presentations
  • Type of Work: Stormwater Management
  • Governing Regulation: State Regulations