Comanche Reservoir Report

Last Updated: December 5, 2025

Comanche is a public utility water supply dam in Pueblo, Colorado, strategically located along the St.


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Summary

Charles River-OS. Built in 1972, this earth dam stands at a height of 20 feet and spans a length of 4801 feet, providing essential water storage and distribution infrastructure for the region. With a maximum storage capacity of 1148 acre-feet and a normal storage level of 853 acre-feet, Comanche plays a crucial role in meeting the water needs of the surrounding communities.

Despite being classified as a low hazard potential structure with a satisfactory condition assessment, Comanche is subject to periodic inspections and regulatory oversight by the Colorado Department of Water Resources. The dam lacks a spillway but is equipped with outlet gates to manage water levels effectively. In the event of an emergency, the dam is prepared with an Emergency Action Plan (EAP) to ensure swift and coordinated response. Overall, Comanche serves as a vital component of the water resource infrastructure in Pueblo, contributing to the region's water supply sustainability and resilience in the face of climate variability and water management challenges.

Year Completed

1972

Dam Length

4801

Dam Height

20

River Or Stream

ST. CHARLES RIVER-OS

Primary Dam Type

Earth

Surface Area

35

Hydraulic Height

20

Nid Storage

1148

Structural Height

20

Hazard Potential

Low

Nid Height

20
       
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.