Road 391 County Dam Reservoir Report

Last Updated: December 5, 2025

Road 391 County Dam, located in Indianola, Nebraska, is a crucial infrastructure owned by the local government to mitigate flood risks along the TR-COON CREEK.


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Summary

Built in 1980, this earth dam stands at a height of 20.2 feet and spans a length of 525 feet, providing essential flood risk reduction measures for the surrounding area. With a storage capacity of 158.9 acre-feet, the dam plays a vital role in safeguarding the community from potential water-related disasters.

Managed by the Nebraska Department of Natural Resources, the Road 391 County Dam is regularly inspected and maintained to ensure its structural integrity and functionality. Despite its low hazard potential, the dam has not been rated for its current condition, highlighting the need for ongoing monitoring and assessment. The dam's primary purpose remains flood risk reduction, serving as a critical line of defense against potential water incidents in the region.

As a part of the comprehensive water resource management plan in Frontier County, Nebraska, the Road 391 County Dam contributes to the overall resilience of the area against climate-related challenges. With its strategic location and effective design, this dam stands as a testament to proactive measures taken to protect the community and its environment from the impacts of water-related emergencies.

Year Completed

1980

Dam Length

525

Dam Height

20.2

River Or Stream

TR-COON CREEK

Primary Dam Type

Earth

Surface Area

10.4

Hydraulic Height

20.2

Drainage Area

1.61

Nid Storage

158.9

Structural Height

20.2

Hazard Potential

Low

Foundations

Soil

Nid Height

20
       
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.