Swart #5 Reservoir Report
Nearby: East Fork Reservoir Swart #7
Last Updated: December 6, 2025
Swart #5 is a privately-owned earth dam located in Rosebud County, Montana, specifically in the city of Thurlow.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1946, this dam stands at a height of 18 feet and serves multiple purposes, including fire protection and providing water for stock or small fish ponds. With a storage capacity of 64 acre-feet, Swart #5 is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and is inspected regularly to ensure its structural integrity.
Despite its low hazard potential, Swart #5 has not been rated for its condition assessment. The dam has a normal storage capacity of 30 acre-feet and a maximum storage of 64 acre-feet, making it a vital resource for fire protection in the area. With its location in the TR-Lone Tree Coulee watershed, Swart #5 plays a crucial role in managing water resources and maintaining the ecological balance of the surrounding environment.
As a key infrastructure for water management in the region, Swart #5 reflects the importance of maintaining and regulating dams to ensure the safety and sustainability of water resources. With its historical significance and continued use for fire protection and livestock watering, Swart #5 exemplifies the intersection of water management and climate resilience in the face of changing environmental conditions.
Year Completed |
1946 |
Dam Length |
175 |
Dam Height |
18 |
River Or Stream |
TR-LONE TREE COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
18 |
Nid Storage |
64 |
Hazard Potential |
Low |
Nid Height |
18 |
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.
Swart #5