Gem Lake

Mono County, California (near June Lake)

River/Stream: Rush Creek

High Hazard

Failure would likely cause loss of life

Key Facts

Dam Type
Concrete
Height
80 ft
Dam Length
688 ft
Reservoir Storage
17,228 acre-ft
Year Completed
1917
Primary Purpose
Hydroelectric
Owner Type
Private
Max Discharge
1,700 cfs

Condition Assessment

PoorLast inspected: 2025-08-20

Hazard Classification: High — This describes the potential consequences of dam failure, not the likelihood of failure.

Condition Assessment: Poor — This describes the current physical condition of the dam based on the most recent inspection.

Location

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Quick Stats

NID ID
CA00453
State
California (CA)
Coordinates
37.75110, -119.14140
Age
109 years

Nearby Dams

External Resources

Data sourced from the National Inventory of Dams (NID). Information may not reflect the most current status of this dam. Hazard classification reflects potential consequences of failure, not the likelihood of failure or the current condition.