Non Potable Reservoir Dam 2 Reservoir Report

Last Updated: December 5, 2025

Non Potable Reservoir Dam 2, located in Colorado Springs, Colorado, is a fascinating Federal-owned structure designed by S.A.


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Summary

MIRO, SKIDMORE, OWINGS, AND MERRILL. This earth dam, standing at a height of 70 feet with a hydraulic height of 67 feet, was completed in 1961 and serves primarily for irrigation purposes. With a maximum storage capacity of 215 acre-feet and a normal storage of 200 acre-feet, this dam covers a surface area of 7.5 acres and has a drainage area of 0.1 square miles.

The dam features an uncontrolled spillway with a width of 10 feet and has a maximum discharge of 150 cubic feet per second. While it does not have outlet gates, it maintains a hazard potential rating of High due to its critical infrastructure role. The dam has a moderate risk assessment rating of 3 and is regulated, inspected, and enforced by the Department of Water Resources in Colorado. Despite its condition assessment being listed as Not Available, the dam's emergency action plan was last revised in June 2020, ensuring preparedness for any potential risks.

Non Potable Reservoir Dam 2, owned and funded by the US Air Force, stands as a vital component of the local water resource infrastructure, showcasing the importance of proper management and maintenance in safeguarding water resources and mitigating potential hazards. Its strategic location and purposeful design highlight its significance in supporting irrigation needs in the region, emphasizing the critical role dams play in water management and climate resilience efforts. For water resource and climate enthusiasts, this dam serves as a compelling example of the intersection between infrastructure development, regulatory oversight, and risk management in ensuring sustainable water resource utilization.

Year Completed

1961

Dam Length

784

Dam Height

70

River Or Stream

TR-MONUMENT CR - OFFSTREAM

Primary Dam Type

Earth

Surface Area

7.5

Hydraulic Height

67

Drainage Area

0.1

Nid Storage

215

Outlet Gates

None, Uncontrolled

Hazard Potential

High

Foundations

Rock, Soil

Nid Height

70
       
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.