Boca Res Nr Truckee Ca Reservoir Report

Last Updated: December 5, 2025

Boca Reservoir is a man-made lake in Truckee, California.


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Summary

It was created in 1939 by the construction of the Boca Dam on the Little Truckee River. The lake has a surface area of 980 acres and can hold up to 40,000 acre-feet of water. It serves as a source of water for the Truckee Meadows Water Authority and provides recreation opportunities for the surrounding communities, including fishing, boating, and camping. The hydrology of the reservoir is heavily influenced by the surrounding snowpack, which provides the majority of the water supply. The Little Truckee River is the primary surface flow provider for the reservoir, but several smaller streams also contribute. The surrounding area is used for agriculture, with hay and cattle grazing being common activities. Overall, Boca Reservoir is an important resource for both water supply and recreation in the Truckee area.

Reservoir Details

Lake Or Reservoir Water Surface Elevation Above Ngvd 1929, Ft 24hr Change -0.01%
Percent of Normal 100%
Minimum 5,544.84 ft
2015-09-11
Maximum 5,604.98 ft
2017-07-16
Average 5,565 ft
Dam_Height 116
Hydraulic_Height 100
Drainage_Area 171
Year_Completed 1939
Nid_Storage 41141
Structural_Height 116
River_Or_Stream LITTLE TRUCKEE RIVER
Foundations Rock
Surface_Area 977
Hazard_Potential High
Dam_Length 1630
Primary_Dam_Type Earth
Nid_Height 116
       
Seasonal Comparison
Reservoir Storage, Acre-Ft Levels
Lake Or Reservoir Water Surface Elevation Above Ngvd 1929, Ft 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.