Non Potable Reservoir Dam 4 Reservoir Report

Last Updated: December 4, 2025

Non Potable Reservoir Dam 4, located in El Paso County, Colorado, was completed in 1958 by the renowned design firm SKIDMORE, OWINGS, AND MERRILL.


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Summary

This Federal-owned earth dam stands at 80 feet in height, with a maximum storage capacity of 150 acre-feet and a surface area of 6.5 acres. The dam primarily serves the purpose of flood risk reduction along Goat Camp Creek, a tributary in the area.

The dam's structure includes buttress core types resting on rock and soil foundations, with an uncontrolled spillway width of 20 feet. The dam's low hazard potential is supported by regular state inspections and maintenance, demonstrating a commitment to safety and regulatory compliance by the US Air Force, the primary owning and operating agency. Despite its moderate risk assessment, the dam's overall condition assessment remains unavailable, highlighting the importance of ongoing monitoring and risk management measures for its continued safety and functionality.

Non Potable Reservoir Dam 4 not only plays a crucial role in flood risk reduction but also supports irrigation purposes in the region. Located in Colorado Springs and under the jurisdiction of the Department of Defense USAF, this dam is a vital component of the local water resource infrastructure. As water resource and climate enthusiasts, understanding and appreciating the design, construction, and ongoing maintenance of dams like Non Potable Reservoir Dam 4 is essential for ensuring the resilience and sustainability of our water supply systems in the face of changing environmental conditions.

Year Completed

1958

Dam Length

450

Dam Height

80

River Or Stream

GOAT CAMP CREEK

Primary Dam Type

Earth

Surface Area

6.5

Hydraulic Height

75

Drainage Area

1.2

Nid Storage

150

Outlet Gates

None, Uncontrolled

Hazard Potential

Low

Foundations

Rock, Soil

Nid Height

80
       
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.