Anderson Reservoir Reservoir Report

Last Updated: December 5, 2025

Anderson Reservoir, located in Garfield County, Colorado, is a Federal-owned Earth dam that serves as a Fish and Wildlife Pond.


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Summary

Completed in 1967, this reservoir has a height of 12 feet and a storage capacity of 100 acre-feet, with a maximum storage of 100 acre-feet. The dam is primarily made of stone and rests on a foundation of rock and soil, with an uncontrolled spillway that is 8 feet wide.

Despite being classified as a low hazard potential structure, Anderson Reservoir has a moderate risk assessment rating of 3. The last inspection of the dam was conducted in August 2017, with an inspection frequency of every 10 years. Currently, the condition of the dam is not rated, and there are no emergency action plans or inundation maps prepared for this structure.

With its scenic location and important role in providing habitat for fish and wildlife, Anderson Reservoir is a significant water resource in Colorado. As climate change continues to impact water availability and quality in the region, the management and maintenance of this reservoir will be essential to ensure its continued functionality and safety for both the environment and nearby communities.

Year Completed

1967

Dam Length

300

Dam Height

12

River Or Stream

BEAR CREEK DIVERSION

Primary Dam Type

Earth

Hydraulic Height

9

Nid Storage

100

Structural Height

9

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Rock, Soil

Nid Height

12
       
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.