Nartron Dam Reservoir Report

Last Updated: December 5, 2025

Nartron Dam, also known as Millers Airport Dam, is a private-owned structure located in Osceola County, Michigan, specifically in the city of Reed City.


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Summary

Built in 1956 by USDA NRCS, this earth-type dam stands at a height of 17 feet and has a hydraulic height of 9 feet. Its primary purpose is for recreation, offering a surface area of 23 acres along the Hersey River.

With a maximum storage capacity of 360 acre-feet and a normal storage capacity of 240 acre-feet, Nartron Dam also serves as a regulated structure under the oversight of the MICHIGAN DEGLE. Despite being rated as having a low hazard potential, the dam is categorized as having a very high risk according to the data, emphasizing the importance of proper risk management measures and inspections. The dam's controlled spillway, with a width of 54 feet, helps manage a maximum discharge of 1800 cubic feet per second.

Water resource and climate enthusiasts may find Nartron Dam an intriguing structure due to its recreational significance, hydraulic features, and regulatory status. As a vital component in the local watershed, it serves as both a source of enjoyment for the community and a potential area for further risk assessment and mitigation efforts. With its historical significance dating back to the mid-20th century, Nartron Dam stands as a testament to the intersection of human infrastructure and natural water systems in the state of Michigan.

Year Completed

1956

Dam Length

480

Dam Height

17

River Or Stream

Hersey River

Primary Dam Type

Earth

Surface Area

23

Hydraulic Height

9

Drainage Area

87

Nid Storage

360

Structural Height

17

Hazard Potential

Low

Nid Height

17
       
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.