Brentwood Park Reservoir Report

Last Updated: December 5, 2025

Brentwood Park, located in Mono Vista, California, is a privately owned dam that serves as a crucial water supply source in the area.


°F

°F

mph

Wind

%

Humidity

Summary

Completed in 1964, this earth dam stands at a height of 58 feet and has a hydraulic height of 54.2 feet, with a storage capacity of 80 acre-feet. The dam sits on Tr Sullivan Creek and covers a surface area of 6 acres, with a drainage area of 0.5 square miles.

Managed by the California Department of Water Resources (DWR) under the Safety of Dams program, Brentwood Park is subject to state regulation, permitting, inspection, and enforcement. The dam is primarily used for water supply but also offers recreational opportunities in the surrounding area. Despite being classified as having a high hazard potential, the dam's condition assessment is rated as satisfactory as of September 2017.

With its strategic location and vital role in water supply, Brentwood Park is a key asset to the community and contributes to the region's water resource management and climate resilience efforts. Regular inspections and adherence to safety regulations ensure that the dam continues to serve its purpose effectively while providing recreational benefits to the local area. As a privately owned structure, its maintenance and operation are critical in ensuring the safety and sustainability of the water supply system it supports.

Year Completed

1964

Dam Length

505

Dam Height

58

River Or Stream

Tr Sullivan Cr

Primary Dam Type

Earth

Surface Area

6

Hydraulic Height

54.2

Drainage Area

0.5

Nid Storage

80

Hazard Potential

High

Nid Height

58
       
Seasonal Comparison

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.