H. H. Moore Divide Reservoir Report

Last Updated: December 4, 2025

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Summary

H. Moore Divide, also known as Coulson Lake, is a privately owned irrigation dam located in Teller County, Colorado. Completed in 1946, this earth dam stands at a height of 30 feet and spans a length of 333 feet. With a maximum storage capacity of 98 acre-feet and a normal storage of 62 acre-feet, this dam serves the primary purpose of irrigation along Rule Creek.

Despite being regulated and inspected by the Colorado Department of Water Resources, the dam's hazard potential is classified as low with a fair condition assessment. However, a high risk level of 2 has been assigned, indicating the need for vigilant risk management measures. With no spillway and a limited emergency action plan in place, the dam poses potential risks that need to be addressed to ensure the safety of the surrounding area and water resources.

Enthusiasts of water resources and climate will find H. H. Moore Divide an intriguing structure due to its historical significance, engineering design, and the potential risks associated with its operation. As stakeholders continue to monitor and manage the dam's condition, it serves as a reminder of the delicate balance between harnessing water for agricultural purposes and ensuring the safety and sustainability of our water resources in a changing climate.

Year Completed

1946

Dam Length

333

Dam Height

30

River Or Stream

RULE CREEK

Primary Dam Type

Earth

Surface Area

6

Hydraulic Height

30

Drainage Area

5

Nid Storage

98

Structural Height

33

Hazard Potential

Low

Nid Height

33
       
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.