February 7, 2020
Flood inundation maps for local EBMUD reservoirs now available
OAKLAND – Inundation maps for EBMUD’s Lafayette and Chabot reservoirs are now publicly available on the California Division of Safety of Dam’s (DSOD) website. The maps provide information about a hypothetical failure of a dam or its related structures, such as a spillway or outlet, to assist in emergency preparedness and planning.
As part of state regulations enacted following the Oroville Dam spillway failure in 2017, California dam owners are required to submit inundation maps showing potential flooding that could result from a dam failure. After the maps are approved, the state makes all inundation maps available to the public.
EBMUD’s dams have been evaluated and deemed safe for continued operation; failure of any EBMUD dam is extremely unlikely.
EBMUD relies on dams to store much of the water it supplies to customers, and regularly assesses, upgrades and improves its East Bay and Sierra foothills dams to ensure they are safe. EBMUD engineers monitor dams using instruments, monthly visual inspections, and periodic dam safety reviews to protect the public, prevent personal injury, and prevent property damage from dam failures. The safety of each dam is continually reevaluated with advances in geotechnical, structural and earthquake engineering. Regulatory agencies also perform independent annual dam inspections.
The California Division of Safety of Dams is responsible for protecting people and property from dam failure. Of EBMUD’s 26 dams, 20 are regulated by the California DSOD and two are jointly regulated by the state and Federal Energy Regulatory Commission. EBMUD is updating flood maps for its DSOD-regulated dams, and will be submitting maps to the state for review and approval on an ongoing basis. Once approved, maps will be published on the DSOD website: fmds.water.ca.gov/maps/damim/
To learn about EBMUD’s Dam Safety Program, visit: ebmud.com/damsafety