Iowa Noname8 Reservoir Report

Last Updated: December 13, 2025

Iowa Noname8, located in Crawford County, Iowa, is a recreational dam managed by the local government and designed by the USDA NRCS.


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Summary

Completed in 1964, this earth dam stands at a height of 38 feet with a length of 522 feet, providing storage of 220 acre-feet of water for recreational purposes. Situated on the TR-Boyer River, this dam is regulated by the Iowa DNR and has a low hazard potential with a moderate risk assessment score.

With a surface area of 11 acres and a drainage area of 0.97 square miles, Iowa Noname8 plays a vital role in providing recreational opportunities for the community. Despite not being rated for its condition, the dam has been inspected periodically since its completion, with the last inspection dating back to September 1964. While the spillway is uncontrolled, the dam's risk assessment suggests moderate risk management measures are in place to ensure public safety in case of emergencies. For water resource and climate enthusiasts, Iowa Noname8 presents an interesting case study in local government management of recreational water structures in the state of Iowa.

Year Completed

1964

Dam Length

522

Dam Height

38

River Or Stream

TR-BOYER RIVER

Primary Dam Type

Earth

Surface Area

11

Drainage Area

0.97

Nid Storage

220

Hazard Potential

Low

Foundations

Soil

Nid Height

38
       
Seasonal Comparison

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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.