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SFPUC outlines $2.7B Phase 1 sewer plan, $7B program total and strategies to manage changing flows
Summary
SFPUC wastewater staff described how San Francisco's combined sewer system handles flows from 80M gpd in dry weather to nearly 600M gpd during storms, presented a $2.7 billion Phase 1 sewer improvement program (part of a roughly $7 billion total plan), and discussed green infrastructure pilots and resource recovery including biogas generation.
Tommy Moala (assistant general manager for wastewater at the SFPUC) presented the utility's assessment of the sewer system and the capital work planned to address aging assets and climate impacts.
Moala emphasized the city's combined sewer system, which carries both sanitary sewage and stormwater, and the resulting operational challenge of changing flows: "We can go from normal dry weather flow from 80,000,000 gallons in all our treatment plants to almost 600,000,000 gallons within a matter of—before within an hour," he said, underscoring…
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