State Line Creek Reservoir Report

Last Updated: December 13, 2025

State Line Creek, also known as Rice Creek, is a private irrigation dam located in Iron County, Utah.


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Summary

Managed by the Utah Division of Water Rights, this earth dam was completed in 1984 and stands at a structural height of 48 feet with a hydraulic height of 44 feet. The dam has a storage capacity of 264 acre-feet and serves the primary purpose of irrigation for the surrounding area.

With a low hazard potential and a condition assessment that is currently not rated, State Line Creek Dam plays a crucial role in water resource management in the region. The dam has a normal storage capacity of 205 acre-feet and a drainage area of 4.3 square miles. Despite not having a spillway type specified, the dam has a maximum discharge capacity of 17 cubic feet per second, ensuring effective water flow control during peak periods.

Although the dam has not been inspected since June 2018, it is subject to regular inspections every 5 years to ensure its structural integrity and compliance with safety regulations. With its vital role in irrigation and water storage, State Line Creek Dam stands as a testament to the importance of sustainable water management practices in the face of changing climate conditions.

Year Completed

1984

Dam Length

225

River Or Stream

STATE LINE CREEK (AKA RICE)

Primary Dam Type

Earth

Hydraulic Height

44

Drainage Area

4.3

Nid Storage

264

Structural Height

48

Hazard Potential

Low

Nid Height

48
       
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.