Halmans #2 Reservoir Report
Nearby: Halmans #3 Halmans #1
Last Updated: December 5, 2025
Halmans #2 is a privately-owned irrigation dam located in Fallon, Montana, specifically in the city of HOYT along TR-PENNEL CREEK.
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Summary
Built in 1954, this Earth-type dam stands at 21 feet in height and spans 200 feet in length, providing a storage capacity of 81 acre-feet for irrigation purposes. Despite being regulated by the Montana Department of Natural Resources and Conservation (DNRC) and meeting state jurisdiction, the dam is classified as low hazard potential and has not been rated for its current condition.
The dam, managed by a private owner, holds significance in the region for its contribution to agricultural water supply and reflects the historical importance of irrigation infrastructure in sustaining farming activities. With its location and purpose tied to the surrounding landscape and water resources, Halmans #2 serves as a reminder of the intricate relationship between human intervention and natural systems in shaping the local environment. As climate change impacts water availability and usage patterns, the maintenance and monitoring of dams like Halmans #2 become increasingly crucial for sustainable water management practices.
While the dam has not been inspected or assessed recently, its operational history and continued state regulation suggest a commitment to ensuring its safety and functionality. As water resource and climate enthusiasts, understanding the role of dams like Halmans #2 in the broader context of water management and adaptation to changing environmental conditions can offer valuable insights into the challenges and opportunities associated with maintaining critical infrastructure in a dynamic climate landscape.
Year Completed |
1954 |
Dam Length |
200 |
Dam Height |
21 |
River Or Stream |
TR-PENNEL CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
21 |
Nid Storage |
81 |
Hazard Potential |
Low |
Nid Height |
21 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Missouri River At Marmarth
|
12cfs |
Deep Creek Nr Amidon
|
0cfs |
Little Missouri River At Medora
|
64cfs |
Yellowstone River At Glendive Mt
|
6000cfs |
Beaver Creek Nr Trotters
|
0cfs |
Powder River Near Locate Mt
|
231cfs |
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.
Halmans #2