From Gray to Green

Spearheaded by the District, 951 Turner Court is a demonstration project with low-impact development (LID) techniques that showcase next-generation green stormwater infrastructure. Industry professionals can now visit Turner Court to learn about LID infrastructure, which uses flowthrough planters, permeable pavers, bioretention tree wells, and other best practices to filter and slow urban runoff. Turner Court is also open to the public for on-site workshops and self-guided tours developed by Alameda County’s Clean Water Program.

This project is a collaboration of the Public Works Agency and the Alameda County Flood Control & Water Conservation District (the District), with funding provided in part by the California State Water Resources Control Board.

The Turner Court Monitoring Project

The District monitored the Turner Court Demonstration Project to measure the reduction in stormwater runoff and pollutants after the LID features were installed.

Key findings include:

  • The new LID pavement resulted in a 52 percent decrease in stormwater runoff, compared to the old impervious pavement.
  • Sediment and sediment-associated analytes (inorganic parameters) showed high removal efficiencies, as did petroleum hydrocarbons and oil & grease. There were notable mass load reductions for all analytes in the solids, conventionals, and synthetic organics groups, some of the nutrients, and total iron.

Turner Court Receives a CASQA Award

In 2019, the Alameda County Public Works Agency (ACPWA), with the support of the District, converted two agency-owned parking lots at Turner Court in Hayward into a Green Infrastructure Demonstration Project. The District and Turner Court Project were recognized for their excellence by the California Stormwater Quality Association (CASQA).