Warren H. Brock Reservoir Dikes Reservoir Report

Last Updated: December 15, 2025

Warren H.


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Summary

Brock Reservoir Dikes, also known as Drop 2, is a federal-owned structure located in Imperial, California. Completed in 2010, this offstream earth dam serves a primary purpose of water supply, with a maximum storage capacity of 8,000 acre-feet and a surface area of 410 acres. The dam stands at a height of 14 feet, with a hydraulic height of 21 feet, and a structural height of 21 feet.

Managed by the Bureau of Reclamation, the Warren H. Brock Reservoir Dikes have a high hazard potential and a moderate risk assessment rating. Despite its critical role in water supply, the condition assessment of the dam is currently not available. The reservoir's spillway type is uncontrolled, with a maximum discharge capacity of 1,800 cubic feet per second.

With its location in a region prone to water resource challenges and climate variability, the Warren H. Brock Reservoir Dikes play a crucial role in water management and supply for the surrounding area. As a key infrastructure owned and operated by the federal government, ensuring the safety and maintenance of this earth dam is essential for the long-term sustainability of water resources in the region.

Year Completed

2010

Dam Length

17580

Dam Height

14

River Or Stream

OFFSTREAM

Primary Dam Type

Earth

Surface Area

410

Hydraulic Height

21

Nid Storage

8000

Structural Height

21

Hazard Potential

High

Nid Height

21
       
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.