Moore Reservoir Report

Last Updated: December 5, 2025

Moore, also known as the Thomas Enlargement, is a privately owned dam located in Kremmling, Colorado.


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Summary

Built in 1904 by designer Frank Huntington, this earth dam on Elliott Creek serves the primary purpose of irrigation. Standing at a height of 35 feet and with a length of 280 feet, Moore has a storage capacity of 241 acre-feet and a surface area of 15 acres. The dam is regulated by the Colorado Department of Water Resources and undergoes regular inspections to ensure its structural integrity and safety. With a low hazard potential and fair condition assessment, Moore poses a moderate risk that is managed through appropriate risk management measures.

The design of Moore includes a stone core supported by rock and soil foundations, with an uncontrolled spillway measuring 10 feet in width. Although the dam has not undergone any significant modifications over the years, it is equipped with outlet gates for water release when necessary. The last inspection conducted in October 2018 revealed the dam to be in fair condition, meeting regulatory guidelines and demonstrating a low hazard potential. The risk associated with Moore is considered moderate, with a risk assessment rating of 3, prompting the implementation of proper risk management measures to mitigate any potential hazards. For water resource and climate enthusiasts, Moore presents an interesting case study of a historic dam with a focus on irrigation and regulatory compliance in the state of Colorado.

Year Completed

1904

Dam Length

280

Dam Height

35

River Or Stream

ELLIOTT CREEK

Primary Dam Type

Earth

Surface Area

15

Hydraulic Height

35

Drainage Area

4

Nid Storage

241

Structural Height

35

Hazard Potential

Low

Foundations

Rock, Soil

Nid Height

35
       
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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.