Horab Reservoir Report
Nearby: Band Aid Picard Reservoir
Last Updated: December 14, 2025
Horab is a private dam located in Roosevelt, Montana, specifically designed by the USDA NRCS for fire protection, stock, and small fish pond purposes.
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Summary
Completed in 1945, this earth dam stands at 32 feet tall with a length of 100 feet, providing a storage capacity of 52 acre-feet. Situated on TR-Little Muddy Creek, Horab is regulated by the DNRC and is under state jurisdiction with permitting, inspection, and enforcement protocols in place to ensure its safety and functionality.
Despite its low hazard potential and moderate risk assessment, Horab has not been rated for its condition assessment. With a spillway width of 40 feet and a maximum discharge capacity of 200 cubic feet per second, the dam serves its primary purposes effectively. While the structure has not been modified in recent years and lacks detailed emergency preparedness measures, Horab remains a key feature in the local water resource management system for fire protection and irrigation purposes, contributing to the overall environmental and agricultural sustainability in the region.
Horab's location and design make it a valuable asset for the community, supporting both agricultural activities and environmental conservation efforts. With its historical significance and functional capabilities, this dam represents a vital component in the water resource infrastructure of Montana, showcasing the importance of responsible dam management and maintenance for sustainable water use in a changing climate.
Year Completed |
1945 |
Dam Length |
100 |
Dam Height |
32 |
River Or Stream |
TR-LITTLE MUDDY CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
32 |
Drainage Area |
0.78 |
Nid Storage |
52 |
Hazard Potential |
Low |
Nid Height |
32 |
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.
Horab