Whatshername Reservoir Report
Last Updated: December 19, 2025
Whatshername is a state-regulated dam located in NASHUA, Montana, along the TR-MUD CREEK.
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Summary
Built in 1943, this earth dam stands at 26 feet high and spans 1020 feet in length, with a storage capacity of 208 acre-feet for purposes such as fire protection, stock, or small fish pond. Operated by the Montana Department of Natural Resources and Conservation (DNRC), Whatshername is classified as having a low hazard potential and is currently rated as 'Not Rated' in terms of its condition assessment.
Despite its age, Whatshername has not been evaluated for its risk assessment, emergency action plan, or inundation maps. However, the dam is regularly inspected, permitted, and enforced by the state regulatory agency, ensuring its safety and compliance with regulations. With its location in Valley County, Montana, and under the jurisdiction of the state, Whatshername serves as an essential water resource for the local community while also contributing to environmental conservation efforts in the region.
For water resource and climate enthusiasts, Whatshername presents a fascinating case study of a historic dam that continues to play a crucial role in water management and conservation. Its presence along TR-MUD CREEK highlights the interconnectedness of water infrastructure and ecosystems, showcasing the importance of responsible dam maintenance and regulation. As discussions around climate change and water scarcity intensify, understanding the operations and maintenance of dams like Whatshername becomes increasingly relevant for ensuring sustainable water management practices in the face of evolving environmental challenges.
Year Completed |
1943 |
Dam Length |
1020 |
Dam Height |
26 |
River Or Stream |
TR-MUD CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
26 |
Nid Storage |
208 |
Hazard Potential |
Low |
Nid Height |
26 |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Duck Creek - Lake Fort Peck
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West End - Lake Fort Peck
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Floodplain- Lake Fort Peck
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Downstream - Fort Peck Lake
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Flat Lake- Lake Fort Peck
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Whatshername