Iowa Noname90 Reservoir Report

Last Updated: December 6, 2025

The Iowa Noname90 dam, located in Union Mills, Iowa, was completed in 1979 and is owned by the local government.


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Summary

This recreational dam stands at a height of 14 feet and spans a length of 585 feet, providing storage for 55 acre-feet of water. Situated on TR-Sugar Creek, the dam serves as a popular spot for outdoor activities and is regulated by the Iowa Department of Natural Resources.

With a low hazard potential and a moderate risk assessment rating, the Iowa Noname90 dam is considered to be in satisfactory condition, although its condition assessment is currently marked as "Not Rated." Despite its relatively small drainage area of 0.37 square miles, the dam offers a surface area of 5 acres for recreational use. Although it boasts uncontrolled spillways, the dam's overall design and construction by the USDA SCS have ensured its functionality and safety for visitors and nearby residents alike.

Year Completed

1979

Dam Length

585

Dam Height

14

River Or Stream

TR-SUGAR CREEK

Primary Dam Type

Earth

Surface Area

5

Drainage Area

0.37

Nid Storage

55

Hazard Potential

Low

Foundations

Soil

Nid Height

14
       
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.
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