Gladman Miller Dam Reservoir Report

Last Updated: December 6, 2025

The Gladman Miller Dam, located in Naponee, Nebraska, is a privately owned structure designed by the USDA NRCS to reduce flood risks in the area.


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Summary

Completed in 1963, this earth dam stands at a height of 23 feet and has a hydraulic height of 22 feet, with a length of 460 feet. It has a normal storage capacity of 7 acre-feet and a maximum storage capacity of 179 acre-feet, serving a drainage area of 3 square miles.

Managed by the Nebraska Department of Natural Resources, the Gladman Miller Dam is regulated, permitted, inspected, and enforced by state authorities to ensure its safety and compliance with regulations. With a low hazard potential and fair condition assessment, the dam plays a crucial role in mitigating flood risks along the Turkey Creek. Although no spillway information is provided, the dam has been regularly inspected every five years, with the last assessment conducted in June 2018.

Overall, the Gladman Miller Dam serves as a vital infrastructure for flood risk reduction in Harlan County, Nebraska. Its construction and maintenance are overseen by the Natural Resources Conservation Service, highlighting the collaboration between private owners and government agencies to protect the local community from potential water-related disasters. The dam's strategic location and design contribute to the overall water resource management efforts in the region, making it an essential component of the area's resilience to climate-related challenges.

Year Completed

1963

Dam Length

460

Dam Height

23

River Or Stream

TR-TURKEY CREEK

Primary Dam Type

Earth

Surface Area

5

Hydraulic Height

22

Drainage Area

3

Nid Storage

179

Structural Height

24

Hazard Potential

Low

Foundations

Soil

Nid Height

24
       
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.