Bn #3 Reservoir Report
Nearby: Schmidt #1 Bar G9 #2
Last Updated: December 5, 2025
Bn #3 is a privately owned earth dam located in Sanders, Montana, along the TR-Muggins Creek.
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Summary
Built in 1966 by USDA NRCS, this dam serves multiple purposes including fire protection, stock watering, and small fish pond support. With a dam height of 33 feet and a storage capacity of 105 acre-feet, Bn #3 plays a crucial role in water resource management in the area.
Managed by the DNRC, Bn #3 is classified as having a low hazard potential and a moderate risk level. The spillway, with a width of 100 feet, is uncontrolled, allowing for the release of excess water during periods of high flow. The dam has not been rated for its condition assessment, but it undergoes regular state inspections, ensuring its safety and reliability for its intended purposes.
Situated in Rosebud County, Bn #3 is a key component of the local water infrastructure, providing essential services to the community while also contributing to the overall ecological health of the area. As climate change continues to impact water resources, structures like Bn #3 will play an increasingly important role in maintaining water security and resilience in the face of changing environmental conditions.
Year Completed |
1966 |
Dam Length |
225 |
Dam Height |
33 |
River Or Stream |
TR-MUGGINS CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
33 |
Drainage Area |
1.25 |
Nid Storage |
105 |
Hazard Potential |
Low |
Nid Height |
33 |
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.
Bn #3