Straza Reservoir Report

Nearby: Abrams Aeree

Last Updated: December 5, 2025

Straza, a privately owned dam located in Coloma, California, on Black Rock Creek, serves multiple purposes including flood risk reduction, irrigation, recreation, and water supply.


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Summary

Completed in 1971, this earth dam stands at a height of 62 feet and has a storage capacity of 185 acre-feet. With a low hazard potential and satisfactory condition assessment, Straza plays a crucial role in managing water resources in El Dorado County.

Managed by the California Department of Water Resources (DWR) under the Safety of Dams program, Straza is regulated, permitted, inspected, and enforced by state authorities to ensure its safety and functionality. Despite its primary purpose of flood risk reduction, the dam's location and design allow for various water-related activities, benefiting both the local community and the environment. With a history of regular inspections and maintenance, Straza remains a reliable infrastructure for water management in the region.

Strategically situated in the San Francisco District of the US Army Corps of Engineers, Straza contributes to the overall water management system in California. With its sound structural integrity, satisfactory condition, and low hazard potential, this dam serves as a model for sustainable water resource management amidst changing climate conditions. Enthusiasts interested in water resources and climate resilience would find Straza's data and operational details intriguing and essential for understanding the complex dynamics of water infrastructure in the region.

Year Completed

1971

Dam Length

365

Dam Height

62

River Or Stream

Black Rock Creek

Primary Dam Type

Earth

Surface Area

13

Hydraulic Height

50

Drainage Area

7.36

Nid Storage

185

Hazard Potential

Low

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.