Upper Biscar Dam (Blm) Reservoir Report

Last Updated: December 5, 2025

Upper Biscar Dam (Blm) is a federal-owned structure located in Lassen, California, with a primary purpose of serving as a Fish and Wildlife Pond.


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Summary

Completed in 2006, this dam stands at a height of 13 feet and has a length of 562 feet, providing a storage capacity of 127 acre-feet for the surrounding area. Despite its relatively low hazard potential, the dam has not been rated for its condition as of the last inspection in 2015.

Managed by the Bureau of Land Management, Upper Biscar Dam plays a crucial role in supporting the local ecosystem and wildlife by providing a habitat for fish and other wildlife species. With a surface area of 18 acres and a normal storage capacity of 91 acre-feet, this dam helps to maintain water levels in the area, contributing to the overall health of the surrounding environment. Situated within the San Francisco District, this dam is an integral part of the water resource infrastructure in the region.

While there are no associated structures with Upper Biscar Dam, its importance lies in its function as a key component of the water management system in the area. As a low-risk structure, it serves as a vital resource for both the local wildlife and the broader ecosystem, highlighting the significance of sustainable water resource management in the face of climate change and increasing water scarcity.

Year Completed

2006

Dam Length

562

Dam Height

13

River Or Stream

59.0 SQ.MI.

Surface Area

18

Hydraulic Height

13

Drainage Area

59

Nid Storage

127

Hazard Potential

Low

Nid Height

13
       
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.