Tomeyer #1 Reservoir Report
Nearby: Olie Bar Z F Ranch Incorporated #1
Last Updated: December 5, 2025
Tomeyer #1 is a state-regulated dam located in Toole, Montana, with the primary purpose of irrigation.
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Summary
Completed in 1920, this earth dam stands at a height of 15 feet and has a storage capacity of 77 acre-feet, with a normal storage level of 40 acre-feet. Situated on the West Fork Willow Creek, this dam plays a crucial role in providing water for agricultural activities in the region.
Owned by the state of Montana and regulated by the Department of Natural Resources and Conservation (DNRC), Tomeyer #1 has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. Despite lacking some detailed information such as spillway type and inspection frequency, this dam serves as a vital infrastructure for water resource management and supports the local irrigation needs. With its location in a picturesque setting and historical significance dating back to the early 20th century, Tomeyer #1 is a notable landmark in the water infrastructure of Montana.
As water resource and climate enthusiasts explore the intricate network of dams across the country, Tomeyer #1 presents a unique example of early 20th-century engineering for irrigation purposes. With its modest size and low hazard potential, this dam stands as a testament to the importance of water management in sustaining agricultural activities in rural Montana. As efforts continue to monitor and maintain the condition of this crucial water infrastructure, Tomeyer #1 remains a symbol of the intersection between human ingenuity and environmental stewardship in managing water resources for the benefit of local communities.
Year Completed |
1920 |
Dam Length |
1200 |
Dam Height |
15 |
River Or Stream |
WEST FORK WILLOW CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
77 |
Hazard Potential |
Low |
Nid Height |
15 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Marias River Near Shelby Mt
|
305cfs |
Marias River Near Chester Mt
|
249cfs |
Teton River Near Dutton Mt
|
83cfs |
Cut Bank Creek At Cut Bank Mt
|
138cfs |
Lake Creek Near Power Mt
|
30cfs |
Marias River Near Loma Mt
|
335cfs |
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.
Tomeyer #1