Miller Dam Reservoir Report

Last Updated: December 5, 2025

Miller Dam, located in Lincoln, Montana, is a private-owned structure constructed in 1980 primarily for recreation purposes, including fish and wildlife pond activities.


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Summary

The dam, standing at a height of 9 feet with a length of 320 feet, serves as a significant water resource on East Fisher Creek, providing a maximum storage capacity of 139 acre-feet. Despite its uncontrolled spillway type, the dam has been state-regulated and inspected by the Department of Natural Resources and Conservation (DNRC) to ensure its safety and compliance with enforcement measures.

With a moderate risk assessment rating of 3, Miller Dam has been deemed to have a significant hazard potential but remains in "Not Rated" condition assessment. The emergency action plan (EAP) status, inundation maps, and risk management measures for the dam are currently not updated or available. The outlet gates consist of a slide (sluice gate) design, and the dam has not been modified in recent years. While the dam's inspection frequency is listed as 0, its location, structure type, and storage capacity make it an essential feature for water resource and climate enthusiasts interested in the management and regulation of dams in Montana.

Year Completed

1980

Dam Length

320

Dam Height

9

River Or Stream

EAST FISHER CREEK

Primary Dam Type

Earth

Hydraulic Height

7

Drainage Area

4.72

Nid Storage

139

Structural Height

9

Outlet Gates

Slide (sluice gate)

Hazard Potential

Significant

Nid Height

9
       
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.