Ja Montgomery #1 Reservoir Report
Nearby: Big Timber #41 Ballard #1
Last Updated: December 8, 2025
Ja Montgomery #1 is a privately owned dam located in Forsyth, Montana, along the TR-Horse Creek.
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Summary
Built in 1946, this earth dam has a height of 20 feet and a length of 250 feet, with a storage capacity of 52 acre-feet. The primary purposes of the dam are for fire protection, stock, and small fish pond maintenance. Despite being regulated by the Montana Department of Natural Resources and Conservation (DNRC), the dam has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment.
With a low hazard potential and a primary purpose of fire protection, Ja Montgomery #1 serves as a crucial water resource for the local community in Rosebud County. The dam's location in the midst of scenic Montana adds to its significance for water and climate enthusiasts. Although the dam has not been inspected recently and its condition assessment is not rated, its presence and function are vital for the surrounding area's water supply and ecosystem health. As a privately owned structure, Ja Montgomery #1 provides a valuable example of individual responsibility and stewardship in managing water resources for multiple purposes.
As a part of the larger water infrastructure in the region, Ja Montgomery #1 contributes to the overall water management efforts in Montana. With its low hazard potential and multiple purposes, including fire protection and maintaining stock and small fish ponds, the dam showcases the diverse roles that water resources play in supporting both human activities and natural ecosystems. Climate and water enthusiasts can appreciate the complex interplay between infrastructure, regulation, and environmental stewardship exemplified by Ja Montgomery #1 in Forsyth, Montana.
Year Completed |
1946 |
Dam Length |
250 |
Dam Height |
20 |
River Or Stream |
TR-HORSE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
52 |
Hazard Potential |
Low |
Nid Height |
20 |
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.
Ja Montgomery #1