Black Cat Reservoir Report
Nearby: Samantha Cool Black Rock
Last Updated: December 20, 2025
Located in Loma, Montana, the Black Cat dam serves multiple purposes including fire protection, stock watering, and small fish pond management.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1944, this earth dam stands at a height of 20 feet and has a storage capacity of 64 acre-feet. The dam is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and is classified as having a low hazard potential.
The Black Cat dam, situated on the TR-Black Coulee river, is owned privately and is subject to state jurisdiction, permitting, inspection, and enforcement. The dam's primary source agency is the state of Montana, and it falls under the Congressional District 00, represented by Greg Gianforte. With a normal storage capacity of 39 acre-feet, the dam provides essential water resources for the local community while also contributing to fire protection measures in the area.
Water resource and climate enthusiasts will appreciate the historical significance and functional diversity of the Black Cat dam. With its strategic location in Hill County, Montana, this dam plays a vital role in supporting various water-related activities while also ensuring the safety and well-being of the surrounding area. As a well-regulated and maintained structure, the Black Cat dam stands as a testament to responsible water management practices in the region.
Year Completed |
1944 |
Dam Length |
300 |
Dam Height |
20 |
River Or Stream |
TR-BLACK COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
64 |
Hazard Potential |
Low |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Marias River Near Chester Mt
|
253cfs |
Marias River Near Loma Mt
|
335cfs |
Missouri River At Virgelle Mt
|
4460cfs |
Teton River At Loma Mt
|
41cfs |
Big Sandy Creek Near Havre Mt
|
6cfs |
Missouri River At Fort Benton Mt
|
4220cfs |
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.
Black Cat