Deadmans Basin Water Supply Canal Storage Reservoir #2 Reservoir Report

Last Updated: December 5, 2025

Deadmans Basin Water Supply Canal Storage Reservoir #2 is a vital water storage facility located in Ryegate, Montana, along the TR-Musselshell River.


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Summary

This reservoir, owned by the state of Montana and regulated by the DNRC, serves as a key source of water supply for the region. With a dam height of 33.1 feet and a storage capacity of 123 acre-feet, it plays a crucial role in ensuring water availability for agricultural, industrial, and domestic use in the area.

The reservoir, constructed primarily for water supply purposes, has a surface area of 22.6 acres and a normal storage capacity of 69 acre-feet. Despite its low hazard potential and not being rated for condition assessment, Deadmans Basin Water Supply Canal Storage Reservoir #2 remains an essential infrastructure for water resource management in Wheatland County, Montana. Its strategic location and design make it a valuable asset in maintaining water security and resilience against potential climate challenges in the region.

As a part of the state-regulated water infrastructure, this reservoir demonstrates Montana's commitment to sustainable water management practices. With its capacity to store and supply water efficiently, Deadmans Basin Water Supply Canal Storage Reservoir #2 stands out as a critical component in the state's efforts to address water resource challenges and ensure a reliable water supply for local communities, even amidst changing climate conditions.

Dam Length

1000

Dam Height

33.1

River Or Stream

TR-MUSSELSHELL RIVER

Primary Dam Type

Earth

Surface Area

22.6

Hydraulic Height

17.8

Nid Storage

123

Structural Height

33.1

Hazard Potential

Low

Nid Height

33
       
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.