Sagittaurius Reservoir Report
Nearby: Three Dollar Bill Johnson (Toole)
Last Updated: December 5, 2025
Sagittaurius is a state-regulated earth dam located in Toole, Montana, primarily serving the purposes of fire protection, stock, and small fish pond.
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Summary
Constructed in 1945 by the USDA NRCS, this dam stands at a height of 12 feet and spans 250 feet in length, with a storage capacity of 291 acre-feet. Situated on the TR-West Fork Willow Creek, it is under the jurisdiction of the DNRC and undergoes regular state permitting, inspection, and enforcement to ensure its safety and functionality.
With a low hazard potential and a condition assessment of 'Not Rated', Sagittaurius is equipped with a spillway width of 100 feet and a maximum discharge capacity of 440 cubic feet per second. The dam's location in Congressional District 00, Montana, under the oversight of the Omaha District, showcases its importance in water resource management for the region. While lacking recent inspection and assessment data, Sagittaurius remains a key infrastructure for water supply, irrigation, and environmental conservation efforts in the area.
Enthusiasts of water resources and climate will find interest in Sagittaurius as a vital component of the local water management system, supporting various agricultural and ecological needs in Toole County, Montana. As a state-owned structure with a history dating back to the mid-20th century, this dam plays a crucial role in ensuring water security and sustainability for the surrounding communities. With ongoing regulatory oversight and maintenance, Sagittaurius stands as a testament to the importance of effective dam management in mitigating risks and enhancing resilience to changing environmental conditions.
Year Completed |
1945 |
Dam Length |
250 |
Dam Height |
12 |
River Or Stream |
TR-WEST FORK WILLOW CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
12 |
Drainage Area |
1.88 |
Nid Storage |
291 |
Hazard Potential |
Low |
Nid Height |
12 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Marias River Near Shelby Mt
|
305cfs |
Marias River Near Chester Mt
|
249cfs |
Cut Bank Creek At Cut Bank Mt
|
138cfs |
Teton River Near Dutton Mt
|
83cfs |
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.
Sagittaurius