Beaver Creek Reservoir Report

Last Updated: December 5, 2025

Beaver Creek, located in Mcarthur, California, is a privately owned earth dam constructed in 1978 with a primary purpose of water supply for irrigation and other uses.


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Summary

With a height of 22 feet and a storage capacity of 214 acre-feet, Beaver Creek plays a crucial role in water resource management in the area. The dam is regulated by the California Department of Water Resources (DWR) and undergoes regular inspections to ensure its safety and compliance with state regulations.

Despite being classified as having a low hazard potential, Beaver Creek is considered to be in satisfactory condition as of its last assessment in September 2017. The dam has a spillway, although specific details regarding its type and dimensions are not provided in the data. The surrounding area has a surface area of 26 acres, serving as a vital water source for the local community. The dam is situated on Tr Beaver Creek, contributing to the overall water management system in Lassen County.

Managed by private owners, Beaver Creek is a notable water resource infrastructure contributing to the irrigation and water supply needs of the region. With its strategic location and storage capacity, the dam plays a significant role in supporting agriculture and other water-dependent activities in the area. Climate and water resource enthusiasts would find Beaver Creek to be an intriguing example of how dams are utilized for sustainable water management in California.

Year Completed

1978

Dam Length

468

Dam Height

22

River Or Stream

Tr Beaver Creek

Primary Dam Type

Earth

Surface Area

26

Hydraulic Height

17

Nid Storage

214

Hazard Potential

Low

Nid Height

22
       
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.