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SFPUC adopts 100-year storm flood-risk map and establishes parcel-review process
Summary
The SFPUC adopted a citywide draft 100-year storm flood-risk map based on an urban watershed H&H model (deep flooding >6 inches and contiguous >half-block), approved procedures for parcel-level appeals, and will use the map as a basis for a disclosure ordinance; staff reported ~4,000 mailed notices and public outreach.
The San Francisco Public Utilities Commission on Sept. 25 adopted a draft 100-year storm flood-risk map that identifies parcels at risk of deep (greater than six inches) and contiguous flooding in a 100-year design storm. Sarah Minnick, who oversees utility planning in wastewater, said the map was produced from the agency's urban watershed hydrology and hydraulics model and GIS analysis and that the map incorporates expected sea-level rise effects on coastal backflow but not a new advanced precipitation dataset currently under…
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