Cedar City - Greens Lake No. 3 Reservoir Report

Last Updated: December 5, 2025

Cedar City - Greens Lake No.


°F

°F

mph

Wind

%

Humidity

Summary

3 is a vital flood risk reduction structure located in Iron County, Utah. Managed by the local government and designed by the USDA NRCS, this earth dam stands at a hydraulic height of 41.8 feet and a structural height of 44.5 feet. Completed in 1958, it serves the primary purpose of flood risk reduction, with a storage capacity of 125 acre-feet and a normal storage level of 54 acre-feet.

This dam plays a crucial role in protecting the surrounding area from potential flooding events, as it has a significant hazard potential. It is regulated and inspected by the Utah Division of Water Rights, ensuring that it meets the necessary safety standards. The dam's spillway width of 100 feet allows for a maximum discharge of 52 cubic feet per second, helping to manage excess water during heavy rainfall events. With a history of regular inspections and maintenance, Cedar City - Greens Lake No. 3 remains a key asset in safeguarding the community against flood risks.

As a part of the flood risk reduction infrastructure in Iron County, Utah, Cedar City - Greens Lake No. 3 stands as a testament to the importance of water resource management in mitigating climate-related challenges. With a history of effective operation and regulated oversight, this dam serves as a critical component in ensuring the safety and resilience of the local community in the face of potential flooding events.

Year Completed

1958

Dam Length

2070

River Or Stream

UNNAMED

Primary Dam Type

Earth

Hydraulic Height

41.8

Drainage Area

2

Nid Storage

125

Structural Height

44.5

Hazard Potential

Significant

Nid Height

45
       
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.