Bevans Creek Reservoir Report

Last Updated: December 5, 2025

Bevans Creek, located in Potter Valley, Mendocino County, California, is a private water resource essential for flood risk reduction, irrigation, and water supply purposes.


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Summary

The dam, completed in 1955, stands at an impressive height of 51 feet and has a storage capacity of 215 acre-feet. The creek covers a surface area of 11 acres and serves a drainage area of 2.6 square miles, making it a crucial asset for the local community.

Managed by the California Department of Water Resources (DWR) under the Safety of Dams program, Bevans Creek Dam has a high hazard potential but is currently assessed as satisfactory in condition. Regular inspections ensure its safety, with the last assessment conducted in September 2017. With a dedicated emergency action plan in place and a history of meeting regulatory guidelines, the dam plays a vital role in mitigating flood risks while providing essential water resources to the region.

Supported by State jurisdiction and regulatory oversight, Bevans Creek Dam represents a significant investment in water infrastructure for the Sacramento District. As a key component in the flood risk reduction strategy, the dam's structural integrity and efficient operation are crucial for protecting the surrounding community and ensuring sustainable water management for years to come.

Year Completed

1955

Dam Length

460

Dam Height

51

River Or Stream

Bevans Creek

Primary Dam Type

Earth

Surface Area

11

Hydraulic Height

44.7

Drainage Area

2.6

Nid Storage

215

Hazard Potential

High

Nid Height

51
       
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.