Diemer Reservoir

High HazardSatisfactory ConditionEmergency Action Plan: Yes

Location

CountyOrange
Nearest CityYorba Linda
River/StreamOffstream
Coordinates33.91090, -117.81930

Physical Characteristics

Dam TypeOther
NID Height22 ft
Dam Height22 ft
Dam Length1,880 ft
Year Completed1963 (63 years old)

Storage & Hydraulics

NID Storage80 acre-ft
Max Storage80 acre-ft
Surface Area5 acres

Ownership & Safety

PurposeWater Supply
OwnerMetropolitan Water District Of Southern California
Owner TypePublic Utility
Hazard ClassificationHigh
Condition AssessmentSatisfactory
Last Inspection08/13/2025
Emergency Action PlanYes

Identifiers

NID IDCA00221
Federal IDCA00221
More InfoState Dam Safety Program

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