Indian Valley Reservoir Report

Last Updated: December 5, 2025

Indian Valley is a captivating water resource and climate enthusiast's dream, located in Lake County, California.


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Summary

This local government-owned dam, managed by CH2M Hill, was completed in 1975 with a primary purpose of irrigation. The dam, standing at a height of 207 feet, serves multiple purposes including fish and wildlife pond, flood risk reduction, hydroelectric power generation, recreation, and water supply. With a normal storage capacity of 261,000 acre-feet and a maximum discharge of 35,000 cubic feet per second, Indian Valley plays a crucial role in managing water resources in the region.

The dam spans a length of 965 feet and has a surface area of 3,750 acres, impounding the North Fork Cache Creek. With a hazard potential rated as high and a very high risk assessment, the dam is regulated by the Federal Energy Regulatory Commission and inspected by the same agency. The spillway, with a controlled design and a width of 59 feet, ensures safety during times of high water levels. In addition to its structural importance, Indian Valley provides a scenic backdrop for outdoor enthusiasts, offering opportunities for fishing, boating, and wildlife observation.

Indian Valley is a symbol of resilience and sustainability in water resource management, showcasing the intricate balance between human needs and environmental conservation. As a cornerstone of the local ecosystem, this earth dam stands as a testament to the principles of responsible water infrastructure development. With ongoing state regulation, inspection, and enforcement, Indian Valley continues to play a vital role in ensuring the safety and prosperity of the surrounding communities while preserving the natural beauty of the landscape.

Year Completed

1975

Dam Length

965

Dam Height

207

River Or Stream

North Fork Cache Creek

Primary Dam Type

Earth

Surface Area

3750

Hydraulic Height

190

Drainage Area

121

Nid Storage

359000

Structural Height

225

Outlet Gates

Tainter (radial) - 2

Hazard Potential

High

Foundations

Rock

Nid Height

225
       
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.