Antelope Lake Reservoir Report

Last Updated: December 5, 2025

Antelope Lake is a reservoir located in Plumas County, California.


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Summary

The lake was created in 1960 by the construction of the Antelope Dam. The hydrology of the lake is largely fed by the Indian Creek and Last Chance Creek watersheds, which provide surface flow and snowpack runoff. The lake serves as a critical water source for agricultural purposes, providing irrigation for the surrounding ranches and farms. Additionally, the lake is a popular recreational destination, offering opportunities for fishing, boating, and camping. The lake has a capacity of 358,650 acre-feet and covers an area of 4,466 acres when full. The lake is managed by the U.S. Forest Service and is part of the Plumas National Forest.

Reservoir Details

Storage 24hr Change -0.25%
Percent of Normal 134%
Minimum 2,617.0 acre-ft
2023-11-28
Maximum 26,867.0 acre-ft
2017-02-09
Average 16,136 acre-ft
Nid_Height 113
Hydraulic_Height 90
Drainage_Area 71
Year_Completed 1964
Dam_Height 113
Primary_Dam_Type Earth
Surface_Area 931
Hazard_Potential High
Nid_Storage 22566
River_Or_Stream Indian Creek
Dam_Length 1320
       
Seasonal Comparison
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Top Conserv Storage Levels
Inflow Levels

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.

Hazard Potential Classification

High
Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.