Martinez Reservoir Report

Last Updated: December 5, 2025

Martinez, also known as Mountain View, is a federal-owned dam located in Contra Costa, California.


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Summary

Built in 1947 by the Bureau of Reclamation, this Earth-type dam primarily serves the purpose of water supply, with a capacity of 296 acre-feet of storage and a maximum discharge rate of 272 cubic feet per second. The dam stands at a height of 44 feet with a structural height of 62 feet, controlling the flow of Pacheco Creek OS and the Sacramento River.

Despite its age, Martinez Dam remains a critical water resource infrastructure with a high hazard potential due to its location and condition assessment, which is currently not available. The dam is monitored and regulated by the Bureau of Reclamation, with regular inspections conducted to ensure the safety and integrity of the structure. The risk assessment for Martinez Dam indicates a very high risk level, emphasizing the importance of implementing effective risk management measures to mitigate potential hazards and protect the surrounding communities.

Overall, Martinez Dam represents a crucial component of California's water supply system, showcasing the intricate balance between water resource management and climate resilience. As water resource and climate enthusiasts, understanding the significance of infrastructure like Martinez Dam highlights the ongoing challenges and responsibilities in safeguarding our natural resources for future generations.

Year Completed

1947

Dam Length

1200

Dam Height

44

River Or Stream

PACHECO CREEK OS, TR SACRAMENTO RIV

Primary Dam Type

Earth

Surface Area

14

Hydraulic Height

42

Nid Storage

296

Structural Height

62

Hazard Potential

High

Nid Height

62
       
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.