Petticoat Junction Reservoir Report
Nearby: Crazy Creek Reservoir Stone Ranch Dam
Last Updated: December 5, 2025
Petticoat Junction is a private dam located in Fergus, Montana, designed by the USDA NRCS for purposes including fire protection, stock, and small fish pond.
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Summary
Completed in 1963, this earth dam stands at 30 feet high and has a storage capacity of 77 acre-feet. Situated on TR-Warm Spring Creek, it serves as a vital resource for the local community, with a low hazard potential and state-regulated oversight by the DNRC.
Owned by a private entity, Petticoat Junction plays a crucial role in water resource management in the region. With a drainage area of 1.58 square miles and a maximum discharge of 60 cubic feet per second, the dam provides essential water storage and flood control benefits. Its location in HILGER, Montana, under the jurisdiction of the state, ensures that it is inspected, permitted, and enforced to meet safety standards and regulations.
For water resource and climate enthusiasts, Petticoat Junction represents a blend of conservation efforts and practical infrastructure for sustainable water use. With its historical significance dating back to the 1960s, this dam continues to contribute to fire protection, livestock management, and ecological support in the area. As a focal point for water management in the region, it highlights the importance of responsible stewardship of our natural resources for the benefit of both people and the environment.
Year Completed |
1963 |
Dam Length |
100 |
Dam Height |
30 |
River Or Stream |
TR-WARM SPRING CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
30 |
Drainage Area |
1.58 |
Nid Storage |
77 |
Hazard Potential |
Low |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Judith River Nr Mouth
|
368cfs |
Missouri River Near Landusky Mt
|
9100cfs |
Musselshell River At Harlowton Mt
|
85cfs |
Musselshell River Nr Martinsdale
|
61cfs |
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.
Petticoat Junction