O'Haire Reservoir Report
Nearby: Iverson Fender Bender
Last Updated: December 21, 2025
O'Haire, located in Toole, Montana, is a private irrigation dam designed by USDA NRCS and completed in 1954.
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Summary
With a height of 23 feet and a storage capacity of 320 acre-feet, this earth dam on Beaupre Coulee serves the primary purpose of irrigation in the region. The dam is regulated by the DNRC and falls under Montana's jurisdiction for permitting, inspection, and enforcement, ensuring its structural integrity and safety.
This low hazard potential dam has a hydraulic height of 20 feet and a spillway width of 20 feet, with a maximum discharge capacity of 110 cubic feet per second. Despite being not rated for its condition assessment, O'Haire remains a vital water resource infrastructure in the area, supporting agricultural activities and water management. With its strategic location and efficient operation, O'Haire plays a crucial role in water distribution and conservation efforts in the region, contributing to sustainable water resource management and climate resilience.
As an essential component of the water infrastructure in Montana, O'Haire's presence highlights the importance of maintaining and regulating dams for water supply and environmental protection. With proper oversight and management, this irrigation dam continues to fulfill its intended purpose while mitigating potential risks and ensuring the safety of surrounding communities and ecosystems. For water resource and climate enthusiasts, O'Haire serves as a fascinating case study in the intersection of infrastructure development, water management, and environmental stewardship.
Year Completed |
1954 |
Dam Length |
50 |
Dam Height |
23 |
River Or Stream |
BEAUPRE COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Drainage Area |
7.81 |
Nid Storage |
320 |
Hazard Potential |
Low |
Nid Height |
23 |
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.
O'Haire