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SFPUC monitoring shows green infrastructure outperformed models, staff says
Summary
SFPUC staff reported that monitored early-implementation green infrastructure projects removed far more stormwater than models predicted — in some cases reducing runoff by more than 80% in monitored drainage areas — and proposed programmatic changes and grant tools to scale maintenance and workforce programs.
San Francisco Public Utilities Commission staff told commissioners June 12 that the commission's early-implementation green infrastructure projects are performing better than expected, and said the results will shape design, maintenance and grant strategies going forward.
Polly Perkins and monitoring staff presented two years of measurements from the Fell/Oak and Sunset project areas and opportunistic results from the Cesar Chavez pilot. Staff said Cesar Chavez reduced about 1,500,000 gallons of stormwater per year. For Fell/Oak, monitored bioretention planters removed about 85% of the stormwater that fell in the drainage management area; a level-of-service storm was reduced by about 86%. Staff reported the Sunset monitored block infiltrated roughly 93% of the stormwater flowing to it during the…
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