Alkali (Toole) Reservoir Report
Nearby: Big Lake (Toole) Him
Last Updated: December 21, 2025
Alkali (Toole) is a privately owned irrigation dam located in Toole, Montana, along the TR-Miners Coulee river.
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Summary
Built in 1907, this earth dam stands at a height of 20 feet and has a storage capacity of 185 acre-feet for irrigation purposes. The dam is regulated by the Montana Department of Natural Resources and Conservation (DNRC), ensuring regular inspection, permitting, and enforcement to maintain its safety and functionality.
Despite its low hazard potential and current "Not Rated" condition assessment, Alkali (Toole) plays a crucial role in supporting agricultural activities in the region by providing water for irrigation. It is essential for water resource and climate enthusiasts to monitor the condition of such structures to ensure their continued effectiveness and safety amid changing environmental conditions. As a key infrastructure for water management, Alkali (Toole) serves as a reminder of the importance of sustainable water resource practices in the face of climate change challenges.
With its historical significance dating back over a century, Alkali (Toole) represents a blend of traditional irrigation practices and modern regulatory oversight. The dam's presence underscores the intricate balance between human intervention and natural resource management, highlighting the ongoing need for responsible stewardship of water resources in the region. As water resource and climate enthusiasts continue to study and advocate for sustainable practices, Alkali (Toole) stands as a testament to the enduring relationship between water infrastructure and environmental stewardship.
Year Completed |
1907 |
Dam Length |
150 |
Dam Height |
20 |
River Or Stream |
TR-MINERS COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
185 |
Hazard Potential |
Low |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Alkali (Toole)