Del Valle

High HazardFair ConditionEmergency Action Plan: Yes

Location

CountyAlameda
Nearest CityLivermore
River/StreamArroyo Valle
Coordinates37.61570, -121.74500

Physical Characteristics

Dam TypeEarth
NID Height222 ft
Dam Height222 ft
Dam Length880 ft
Year Completed1968 (58 years old)

Storage & Hydraulics

NID Storage77,100 acre-ft
Max Storage77,100 acre-ft
Surface Area710 acres
Drainage Area146 sq mi
Max Discharge47,000 cfs

Ownership & Safety

PurposeFlood Risk Reduction
OwnerCalifornia Department of Water Resources
Owner TypeState
Hazard ClassificationHigh
Condition AssessmentFair
Last Inspection11/03/2025
Emergency Action PlanYes

Identifiers

NID IDCA00043
Federal IDCA00043
More InfoState Dam Safety Program

Nearby Dams