L&V Rowten #1 Reservoir Report
Nearby: Williams Coulee #2 B Shaw #1
Last Updated: December 6, 2025
L&V Rowten #1 is a privately owned earth dam located in Mosby, Montana, along the TR-Musselshell River.
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Summary
Built in 1963 by the USDA NRCS, the dam stands at a height of 30 feet and has a storage capacity of 46 acre-feet. With a primary purpose of fire protection, stock, or small fish pond, the dam serves the local community by providing essential water resources for various needs.
Despite its low hazard potential and moderate risk assessment score of 3, L&V Rowten #1 is regulated, inspected, and enforced by the Montana Department of Natural Resources Conservation (DNRC). The dam features an uncontrolled spillway with a width of 45 feet and a maximum discharge capacity of 225 cfs. While the condition assessment is currently rated as "Not Rated," the dam's risk management measures and emergency action plan status remain unclear.
For water resource and climate enthusiasts, L&V Rowten #1 presents an intriguing case study of a small-scale dam in a rural setting. Its location in Petroleum County, Montana, and association with the USDA NRCS highlight the importance of sustainable water management practices in agricultural and fire-prone regions. As efforts continue to assess and monitor the dam's structural integrity and risk factors, the story of L&V Rowten #1 serves as a reminder of the crucial role that dams play in water resource conservation and community safety.
Year Completed |
1963 |
Dam Length |
150 |
Dam Height |
30 |
River Or Stream |
TR-MUSSELSHELL RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
30 |
Drainage Area |
0.47 |
Nid Storage |
46 |
Hazard Potential |
Low |
Nid Height |
30 |
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.
L&V Rowten #1