Dnestr Reservoir Report

Last Updated: December 5, 2025

Dnestr, also known as the Big Reservoir, is a private water resource located in Chouteau, Montana, specifically in the city of Loma.


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Summary

This reservoir plays a crucial role in fire protection, stock maintenance, and serving as a small fish pond. It was completed in 1950 and has a dam height of 25 feet, with a storage capacity of 117 acre-feet. The primary purpose of Dnestr is to ensure water availability for various uses while maintaining a low hazard potential.

Managed by the Montana Department of Natural Resources and Conservation (DNRC), Dnestr is state-regulated, inspected, and enforced to meet safety and operational standards. The reservoir is situated along the TR-Chimney Rock Coulee river/stream, providing essential water resources to the surrounding area. Despite its low hazard potential, the condition assessment of Dnestr is currently not rated, emphasizing the need for regular monitoring and maintenance to ensure its continued functionality and safety. With its strategic location and purpose, Dnestr serves as a vital water source for both human and ecological needs in the region.

Year Completed

1950

Dam Length

250

Dam Height

25

River Or Stream

TR-CHIMNEY ROCK COULEE

Primary Dam Type

Earth

Hydraulic Height

25

Nid Storage

117

Hazard Potential

Low

Nid Height

25
       
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.