Stevenot Reservoir Report

Last Updated: December 5, 2025

Stevenot Dam, located in Angels City, California, is a privately owned structure designed for water supply purposes on Tr Carson Creek.


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Summary

Built in 1987, this earth dam stands at a height of 70 feet with a storage capacity of 150 acre-feet. The dam plays a crucial role in water management in the region, serving as a source of water for various activities, including tailings disposal.

Managed and regulated by the California Department of Water Resources (DWR) under the Safety of Dams program, Stevenot Dam is subject to regular inspections to ensure its structural integrity and safety. With a significant hazard potential, the dam has been assessed to be in satisfactory condition as of September 2017. The last inspection, conducted in March 2021, indicated that the dam continues to meet safety standards, highlighting its importance in maintaining water resources in the area.

As a key component of the water supply infrastructure in Calaveras County, Stevenot Dam plays a critical role in managing water resources for the local community. With its strategic location and storage capacity, the dam contributes to ensuring a reliable water supply for various purposes while adhering to state regulations and safety standards. Its significance in the region's water management system underscores the importance of ongoing monitoring and maintenance to safeguard against potential risks and ensure continued water security for the area.

Year Completed

1987

Dam Length

419

Dam Height

70

River Or Stream

Tr Carson Creek

Primary Dam Type

Earth

Surface Area

8

Hydraulic Height

66

Drainage Area

0.04

Nid Storage

150

Hazard Potential

Significant

Nid Height

70
       
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.