Csp Mule Creek Reservoir Report

Last Updated: December 13, 2025

Csp Mule Creek is a state-owned offstream water supply dam located in Ione, California, completed in 1988.


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Summary

With a dam height of 51 feet and a hydraulic height of 47.2 feet, the primary purpose of this earth dam is to provide water supply for various uses including flood risk reduction, irrigation, and water supply. The dam has a storage capacity of 535 acre-feet and covers a surface area of 24 acres, serving the local community in Amador County.

Managed by the California Department of Water Resources (DWR) and Safety of Dams, Csp Mule Creek is regulated, permitted, inspected, and enforced by the state authorities. It has a high hazard potential but is assessed to be in satisfactory condition as of September 2017. The emergency action plan (EAP) for the dam was last revised in January 2021, ensuring that proper protocols are in place in case of any unforeseen events. With its critical role in providing water supply and mitigating flood risks, Csp Mule Creek stands as a vital infrastructure supporting the water resource management efforts in the region.

Year Completed

1988

Dam Length

2300

Dam Height

51

River Or Stream

Offstream

Primary Dam Type

Earth

Surface Area

24

Hydraulic Height

47.2

Drainage Area

0.05

Nid Storage

535

Hazard Potential

High

Nid Height

51
       
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.