Lee #13 Reservoir Report
Nearby: Sunday Creek Reservoir Lee #11
Last Updated: December 6, 2025
Lee #13 is a private-owned Earth dam located in Rosebud, Montana, with a primary purpose of irrigation.
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Summary
Completed in 1950, this structure stands at a height of 15 feet and has a storage capacity of 129 acre-feet. Situated on Thompson Creek, this dam plays a crucial role in providing water for agricultural activities in the region.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Lee #13 is classified as a low-hazard dam with a condition assessment of "Not Rated." Although the dam has not been inspected recently, it is regulated by the state and subject to regular inspections, ensuring its structural integrity and safety for surrounding communities. With a maximum discharge and spillway type not specified, the dam continues to serve as a vital water resource for the area.
Representing a historical milestone in water management, Lee #13 highlights the importance of irrigation infrastructure in sustaining agricultural practices in Montana. As climate change impacts water availability, dams like Lee #13 play a crucial role in ensuring reliable water supply for farms and ranches in the region. With state regulation and inspection in place, this Earth dam continues to contribute to water security and resilience in Rosebud County.
Year Completed |
1950 |
Dam Length |
125 |
Dam Height |
15 |
River Or Stream |
TR-THOMPSON CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
129 |
Hazard Potential |
Low |
Nid Height |
15 |
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.
Lee #13