Roundup Sewage Lagoon Reservoir Report
Nearby: Sheepland Rp Griffith #1
Last Updated: December 5, 2025
The Roundup Sewage Lagoon in Musselshell, Montana, is a crucial infrastructure managed by the local government to treat and store wastewater from the city of Roundup.
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Summary
This sewage lagoon, completed in 1957, has a primary purpose of managing wastewater and features an earth dam with a height of 12 feet and a hydraulic height of 8 feet. With a storage capacity of 330 acre-feet, the lagoon plays a vital role in protecting the environment and public health by ensuring proper wastewater treatment.
Located near the TR-Musselshell River, the Roundup Sewage Lagoon is regulated by the Montana Department of Natural Resources and Conservation (DNRC), with state oversight for permitting, inspection, and enforcement. Despite its low hazard potential, the lagoon has not been rated for condition assessment, indicating a need for further evaluation. The infrastructure's emergency action plan status, risk assessment, and management measures are also not fully documented, highlighting areas for improvement in ensuring the safety and reliability of this essential water resource facility.
As water resource and climate enthusiasts, it is important to recognize the significance of infrastructure like the Roundup Sewage Lagoon in managing wastewater and protecting water quality in our communities. By advocating for proper maintenance, inspection, and emergency preparedness measures for facilities like this lagoon, we can contribute to safeguarding our water resources and the environment for future generations.
Year Completed |
1957 |
Dam Length |
1000 |
Dam Height |
12 |
River Or Stream |
TR-MUSSELSHELL RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
8 |
Nid Storage |
330 |
Hazard Potential |
Low |
Nid Height |
12 |
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.
Roundup Sewage Lagoon