Eagle Ranch Reservoir Report

Last Updated: December 5, 2025

Eagle Ranch is a privately owned dam located in Atascadero, California, along Hale Creek.


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Summary

Built in 1974, this earth dam stands at a height of 55 feet and serves the primary purpose of flood risk reduction. With a storage capacity of 300 acre-feet, Eagle Ranch plays a crucial role in irrigation and water supply in the region, covering a drainage area of 1.39 square miles.

Managed by the California Department of Water Resources (DWR), Eagle Ranch is subject to state regulations and undergoes regular inspections to ensure its structural integrity. The dam has been deemed to have a significant hazard potential, but its condition has been assessed as satisfactory as of September 2017. Despite its age, Eagle Ranch continues to provide essential flood protection and water management services for the surrounding area.

Under the jurisdiction of the San Francisco District of the US Army Corps of Engineers, Eagle Ranch is a key component of the region's water infrastructure. With its efficient flood risk reduction capabilities and vital role in irrigation and water supply, this dam stands as a testament to the importance of responsible water resource management in the face of changing climate conditions.

Year Completed

1974

Dam Length

370

Dam Height

55

River Or Stream

Hale Creek

Primary Dam Type

Earth

Surface Area

19

Hydraulic Height

49

Drainage Area

1.39

Nid Storage

300

Hazard Potential

Significant

Nid Height

55
       
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.