Halfway Reservoir Report
Nearby: H C Brown #1 Liming Reservoir
Last Updated: December 24, 2025
Located in Lodge Grass, Montana, the Halfway dam serves multiple purposes including fire protection, stock watering, and creating a small fish pond.
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Summary
Built in 1956, this earth dam stands at 18 feet tall and has a storage capacity of 137 acre-feet. The dam is owned and regulated by private entities but falls under the jurisdiction of the Montana Department of Natural Resources and Conservation (DNRC).
Halfway dam's hazard potential is rated as low, with its condition assessment currently not rated. While the dam has not been inspected recently, it is designed to meet state regulations and undergoes regular state permitting, inspection, and enforcement processes. The dam's primary source agency is the state of Montana, with no federal involvement in its ownership, funding, design, construction, or operations.
Enthusiasts of water resources and climate will find Halfway dam an interesting structure to study, given its role in providing essential services such as fire protection and stock watering in the Big Horn County area. With its unique location along the TR-Halfway Creek and a rich history dating back to the mid-20th century, the dam offers valuable insights into the management of water resources in rural Montana. As a privately owned and state-regulated facility, Halfway dam exemplifies the collaborative efforts between private landowners and state agencies to ensure the safety and sustainability of water infrastructure in the region.
Year Completed |
1956 |
Dam Length |
140 |
Dam Height |
18 |
River Or Stream |
TR-HALFWAY CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
18 |
Nid Storage |
137 |
Hazard Potential |
Low |
Nid Height |
18 |
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.
Halfway