Larson #3 Reservoir Report
Nearby: Larson #2 Clark (Custer)
Last Updated: December 6, 2025
Larson #3 is a privately owned earth dam located in Miles City, Montana, on Steiger Creek.
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Summary
Constructed in 1955, this dam serves multiple purposes including fire protection, stock, and as a small fish pond. With a height of 14 feet and a length of 350 feet, Larson #3 has a storage capacity of 52 acre-feet, with a normal storage level of 17 acre-feet. Despite its low hazard potential and not being rated for its condition, Larson #3 is regulated by the Montana Department of Natural Resources and Conservation (DNRC) with regular inspections, permitting, and enforcement to ensure its safety and compliance.
Situated in a rural area, Larson #3 plays a crucial role in water resource management for fire protection and agricultural purposes in Custer County, Montana. Its location and purpose make it a valuable asset for the local community and surrounding areas. Although specific details about the dam's condition assessment, emergency action plan, and risk management measures are not provided, its importance for maintaining water resources in the region is evident. With its close proximity to Miles City, Larson #3 serves as a vital infrastructure for ensuring water supply and management in the area.
Overall, Larson #3 stands as a testament to the importance of private dams in water resource management, particularly in rural areas where access to water for firefighting and agricultural needs is crucial. While it may not have a high hazard potential, the dam's role in providing water storage and protection highlights its significance for the local community. As a regulated structure under the DNRC, Larson #3 undergoes regular inspections and enforcement to ensure its safety and compliance, contributing to sustainable water resource management in the region.
Year Completed |
1955 |
Dam Length |
350 |
Dam Height |
14 |
River Or Stream |
STEIGER CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
14 |
Nid Storage |
52 |
Hazard Potential |
Low |
Nid Height |
14 |
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.
Larson #3