Mendiboure Reservoir Report

Last Updated: December 5, 2025

Located in Lassen, California, Mendiboure Reservoir is a privately-owned earth dam structure that was completed in 1949 for the primary purpose of water supply.


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Summary

With a height of 30 feet and a hydraulic height of 25.7 feet, Mendiboure Reservoir has a storage capacity of 1,130 acre-feet and covers a surface area of 105 acres. The reservoir is situated on Tr Van Loan Creek and serves the surrounding area for irrigation and water supply needs.

Managed by the state regulatory agency and subject to inspections and enforcement, Mendiboure Reservoir has a high hazard potential but is currently rated in satisfactory condition. The dam has a history of compliance with safety regulations and guidelines, with the last inspection conducted in June 2020. Despite its age, Mendiboure Reservoir remains a vital water resource infrastructure in the region, contributing to the conservation and management of water resources in California. Enthusiasts of water resources and climate will find Mendiboure Reservoir's design and operational details intriguing as they play a crucial role in supporting sustainable water supply practices in the area.

Year Completed

1949

Dam Length

800

Dam Height

30

River Or Stream

Tr Van Loan Cr

Primary Dam Type

Earth

Surface Area

105

Hydraulic Height

25.7

Drainage Area

8.6

Nid Storage

1130

Hazard Potential

High

Nid Height

30
       
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.