Boca Reservoir Report

Last Updated: December 5, 2025

Located in Verdi, Nevada, Boca is a federal-owned dam on the Little Truckee River in California.


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Summary

Built in 1939 by the Bureau of Reclamation, Boca serves primarily for hydroelectric purposes and irrigation. Standing at 116 feet in height with a structural height of 116 feet, Boca has a storage capacity of 41,141 acre-feet and a drainage area of 171 square miles. With a maximum discharge of 8,000 cubic feet per second, Boca features a controlled spillway with a width of 40 feet.

Despite its age, Boca has a high hazard potential and a very high risk assessment rating. Although the condition assessment is not available, regular inspections by the Bureau of Reclamation ensure the safety and integrity of the dam. Emergency action plans have been prepared and meet guidelines, with the last revision in May 2017. With its critical role in water resource management and energy production, Boca remains a key infrastructure in the region, warranting close monitoring and maintenance to mitigate potential risks associated with its operation.

Year Completed

1939

Dam Length

1630

Dam Height

116

River Or Stream

LITTLE TRUCKEE RIVER

Primary Dam Type

Earth

Surface Area

977

Hydraulic Height

100

Drainage Area

171

Nid Storage

41141

Structural Height

116

Hazard Potential

High

Foundations

Rock

Nid Height

116
       
Seasonal Comparison

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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.