Millsite Reservoir Report

Last Updated: December 5, 2025

Millsite is a privately-owned dam located in Emery, Utah, specifically in the city of Ferron.


°F

°F

mph

Wind

%

Humidity

Summary

Built in 1971 by USDA NRCS, this earth dam serves the primary purpose of irrigation, with a storage capacity of 20,000 acre-feet. The dam is situated on Ferron Creek and is regulated by the Utah Division of Water Rights, ensuring that it meets state permitting, inspection, and enforcement requirements.

With a hydraulic height of 107 feet and a structural height of 115 feet, Millsite Dam has a high hazard potential but is currently assessed to be in fair condition. The dam's maximum discharge capacity is 480 cubic feet per second, serving a drainage area of 157 square miles. While there are no associated structures or locks, the dam's spillway type and width are not specified in the data. The last inspection of Millsite took place in September 2020, with a scheduled inspection frequency of once per year.

Overall, Millsite Dam is a vital water resource in the region, providing irrigation water for agricultural use. As a privately-owned structure, it is important that the dam is properly maintained and regulated to ensure its safety and efficiency. Climate and water resource enthusiasts will appreciate the technical details of Millsite, along with its role in water management and sustainability efforts in Utah.

Year Completed

1971

Dam Length

4150

River Or Stream

FERRON CREEK

Primary Dam Type

Earth

Hydraulic Height

107

Drainage Area

157

Nid Storage

20000

Structural Height

115

Hazard Potential

High

Nid Height

115
       
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.