Boca Reservoir Reservoir Report

Last Updated: December 5, 2025

Boca Reservoir is located in northern California and is a popular recreation area for boating, fishing, and camping.


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Summary

The reservoir was created in the early 20th century to store water for irrigation and hydropower in the Truckee River Basin. The hydrology of the reservoir is heavily dependent on snowpack from the Sierra Nevada Mountains and the surrounding area. The Truckee River and Little Truckee River are the primary surface flow providers, while snowmelt runoff from the surrounding mountains also contributes to the reservoir's water supply. The area surrounding the reservoir is used for agriculture, including grazing and hay production. The recreational uses of the reservoir are numerous, including boating, fishing, swimming, and camping. The reservoir is also home to a variety of wildlife, including bald eagles, osprey, and black bears.

Reservoir Details

Storage 24hr Change 0.42%
Percent of Normal 254%
Minimum 3,450.0 acre-ft
2015-09-10
Maximum 40,839.0 acre-ft
2017-07-15
Average 13,343 acre-ft
Nid_Height 116
Hydraulic_Height 100
Primary_Dam_Type Earth
Drainage_Area 171
Year_Completed 1939
Dam_Height 116
Structural_Height 116
Foundations Rock
Surface_Area 977
Hazard_Potential High
Nid_Storage 41141
River_Or_Stream LITTLE TRUCKEE RIVER
Dam_Length 1630
       
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.