South San Francisco Bay Shoreline Project
Participating Agencies: Santa Clara Valley Water District, US Army Corps of Engineers (San Francisco District), Coastal Conservancy, US Fish & Wildlife Service

Videos

Flyover of Shoreline Project Area

This video uses an airplane flyover to show the on-the-ground flood risk management features the Shoreline Project would erect to protect the San Jose shoreline.

Maps

Flood Risk and Sea Level Rise - South Bay

The pink and red areas of this map show areas of the South Bay that are vulnerable to sea level rise. The pink zone shows a 16-inch rise; the red zone shows those areas within a 55-inch rise. As shown, the offices of numerous Silicon Valley firms lie within or near these zones. The purple indicates those areas vulnerable to a 100-year flood, or a flood that has a 1% chance of occurring in any given year. Map produced by GreenInfo Network; data from Knowles 2008; Seigel and Bachand 2002; FEMA; and California GAP 2009.

small basemap

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Shoreline Project Maps

Study boundary map

small basemap

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Shoreline Project Tentatively Selected Plan

The tentatively selected plan being analyzed by the draft feasibility study and environmental impact statement includes a flood management levee (in red) that connects to existing levees along the Guadalupe River/Alviso Slough and Coyote Creek. A flood gate would be used at the railroad crossing. Ponds A9-15 and Pond A18 would be restored to wetlands in a phased approach over many years, breaching the external and internal salt pond levees and opening these areas to tidal waters and sediment.

Tentatively Selected Plan

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Shoreline Project Year 0 Combined Inundation Map

Shoreline Project Draft 2017 Inundation Map

U.S. Army Corps of Engineers draft map of likely Santa Clara Valley flooding in 2017 during a storm event with a 1% probability of occurring in each year. Projections are derived from computer modeling. Combined extreme high tides and storm events could cause significant economic damage now.

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South San Francisco Bay Shoreline Project Year 50 Curve 3 Combined Inundation Map

Shoreline Project Draft 2067 Inundation Map Under Highest Sea Level Rise Scenario

U.S. Army Corps of Engineers draft map of likely Santa Clara Valley flooding in 2067 during a storm event with a 1% probability of occurring in each year, assuming more than 2 feet of sea level rise.

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Flood Risk Assessment

Shoreline Project Flood Risk Assessment Map of Areas with High Flood-Related Damages

This map shows areas of Santa Clara County that would sustain highest damages under U.S. Army Corps of Engineers modeling. Yellow circles show areas with highest damages; Green dashed circles show areas with high damage under the highest sea level rise estimate used by the Corps (just over 2 feet of sea level rise by 2067).

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