Cobble Creek Dam (Morgan) Reservoir Report

Last Updated: December 5, 2025

Cobble Creek Dam in Morgan, Utah, is a privately owned structure designed by Ensign Engineering for irrigation purposes.


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Summary

Completed in 2016, this earth dam stands at a hydraulic height of 32 feet and a structural height of 38 feet, with a length of 345 feet. It has a storage capacity of 65 acre-feet, with normal storage at 40 acre-feet, serving the local area for agricultural water supply.

Maintained and regulated by the Utah Division of Water Rights, Cobble Creek Dam is subject to state inspection, enforcement, and permitting. The dam has a high hazard potential but is currently rated as satisfactory in condition assessment as of February 2017. With a drainage area of 0.7 square miles and a maximum discharge of 19.5 cubic feet per second, this dam plays a crucial role in water resource management in the region.

Located in Mountain Green, the dam's strategic placement ensures efficient water distribution for irrigation purposes. With a spillway width of 50 feet and a robust stone core foundation, Cobble Creek Dam provides essential water storage and management capabilities while adhering to state regulatory guidelines. Its completion in 2016 signifies a commitment to sustainable water resource practices for the benefit of the local community.

Year Completed

2016

Dam Length

345

Primary Dam Type

Earth

Hydraulic Height

32

Drainage Area

0.7

Nid Storage

65

Structural Height

38

Hazard Potential

High

Foundations

Soil

Nid Height

38
       
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.