Miller Reservoir Report

Last Updated: December 5, 2025

Miller is a public utility-owned earth dam located in Commerce City, Colorado, along the South Platte River.


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Summary

Completed in 2008, this dam serves as a crucial water supply source with a storage capacity of 2,262 acre-feet and a surface area of 65 acres. Standing at a height of 44 feet and spanning 4,951 feet in length, Miller plays a vital role in water management and distribution within the region.

Maintained by the Colorado Department of Water Resources, Miller has been classified as having a low hazard potential with a satisfactory condition assessment as of June 2016. Despite its moderate risk assessment level, this dam has met regulatory standards with regular inspections and enforcement measures in place. With a spillway width of 10 feet and a maximum discharge capacity of 151 cubic feet per second, Miller ensures efficient water flow and flood control along the South Platte River.

With its strategic location and design, Miller stands as a testament to sustainable water resource management in Colorado. As a key infrastructure for water supply purposes, this earth dam showcases the importance of proactive regulatory oversight and maintenance to ensure the safety and reliability of our water resources in the face of changing climate conditions.

Year Completed

2008

Dam Length

4951

Dam Height

44

River Or Stream

SOUTH PLATTE-TR

Primary Dam Type

Earth

Surface Area

65

Hydraulic Height

43

Nid Storage

2262

Structural Height

53

Hazard Potential

Low

Foundations

Rock, Soil

Nid Height

53
       
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.