Clear Lk - Cache Creek Reservoir Report

Last Updated: January 2, 2026

Clear Lake is a natural lake located in Lake County, California.


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Summary

It is the largest natural freshwater in California and is fed by several streams, including Cache Creek. The lake has a long history of human habitation, and evidence of Native American settlements can be traced back 10,000 years. The lake was used for fishing, hunting, and gathering by the Pomo people. Clear Lake is also a popular spot for recreational activities such as fishing, boating and swimming. Cache Creek is an important tributary to Clear Lake and provides much of the lake's inflow. The creek is also a source of water for agricultural irrigation in the area. The hydrology of Cache Creek includes both surface flow and snowpack melt. The creek is an important source of water for the Sacramento River, which is a vital waterway for California's agricultural industry.

Reservoir Details

Storage 24hr Change -1.0%
Percent of Normal 187%
Minimum 397.0 acre-ft
2014-12-09
Maximum 448,449.0 acre-ft
2017-02-22
Average 112,808 acre-ft
       
Seasonal Comparison
Storage Levels
Pool Elevation Levels
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.