Stellar Lake Reservoir Report
Nearby: Hanson Co #11 Twin Dam #1
Last Updated: December 6, 2025
Stellar Lake, located in Rosebud, Montana, is a private irrigation reservoir with a dam height of 28 feet and a length of 400 feet.
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Summary
Constructed in 1957 by the USDA NRCS, this Earth-type dam serves the primary purpose of irrigation, providing a storage capacity of 604 acre-feet and a normal storage level of 380 acre-feet. The dam is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and is subject to state permitting, inspection, and enforcement.
Despite its low hazard potential and a lack of condition assessment rating, Stellar Lake remains an essential water resource in the region, supporting agricultural activities in the area. The dam is situated on TR-Little Porcupine Creek and is under the jurisdiction of the state of Montana. With its picturesque location and critical role in water management, Stellar Lake serves as a vital infrastructure for sustaining both the local ecosystem and the agricultural community in the region.
As a key component of the irrigation infrastructure in Rosebud County, Stellar Lake plays a crucial role in water resource management and climate adaptation efforts. With its controlled storage capacity and regulated operation, the reservoir helps mitigate water scarcity and supports sustainable agricultural practices in the area. As water resource and climate enthusiasts, understanding the significance of dams like Stellar Lake is essential for advancing conservation efforts and promoting resilience in the face of changing environmental conditions.
Year Completed |
1957 |
Dam Length |
400 |
Dam Height |
28 |
River Or Stream |
TR-LITTLE PORCUPINE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
28 |
Nid Storage |
604 |
Hazard Potential |
Low |
Nid Height |
28 |
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.
Stellar Lake