Keswick Reservoir Reservoir Report

Last Updated: December 5, 2025

Keswick Reservoir is located in northern California and is part of the Shasta-Trinity National Forest.


°F

°F

mph

Wind

%

Humidity

Summary

It was constructed in the early 1950s as part of the Keswick Dam project, which aimed to provide hydroelectric power and irrigation water to the surrounding agricultural community. The reservoir is fed by the Sacramento River and several smaller tributaries, and its hydrology is influenced by both snowpack melt and surface flow. The snowpack is primarily provided by the nearby Trinity Alps, while surface flow is dependent on precipitation and runoff in the surrounding area. The reservoir is used for irrigation, but also serves as a popular recreational destination for fishing, boating, and swimming. However, in recent years, the reservoir has been impacted by drought, leading to decreased water levels and restrictions on recreational activities.

Reservoir Details

Storage 24hr Change 3.32%
Percent of Normal 100%
Minimum 16,714.0 acre-ft
2015-02-08
Maximum 23,657.0 acre-ft
2012-08-14
Average 21,379 acre-ft
Dam_Height 157
Hydraulic_Height 121
Drainage_Area 6380
Year_Completed 1949
Nid_Storage 25132
Structural_Height 157
River_Or_Stream SACRAMENTO RIVER
Foundations Rock
Surface_Area 640
Hazard_Potential High
Dam_Length 1046
Primary_Dam_Type Concrete
Nid_Height 157
       
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.