Halmans #3 Reservoir Report
Nearby: Halmans #1 Halmans #2
Last Updated: December 5, 2025
Halmans #3 is a privately owned earth dam located in Fallon, Montana, specifically in the city of HOYT.
°F
°F
mph
Wind
%
Humidity
Summary
Completed in 1954, this irrigation dam stands at a height of 20 feet and has a storage capacity of 81 acre-feet, with a normal storage level of 28 acre-feet. Situated on TR-PENNEL CREEK, this structure serves the primary purpose of providing water for irrigation in the surrounding area.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Halmans #3 is classified as a low hazard potential dam with a current condition assessment of "Not Rated." Despite lacking certain inspection and emergency preparedness details, this dam has been deemed safe for operation. The dam's location in Congressional District 00, Montana, under the representation of Greg Gianforte (R), highlights its importance in water resource management within the state.
Overall, Halmans #3 serves as a crucial infrastructure for supporting agricultural activities in the region, ensuring reliable water supply for irrigation purposes. Its historical significance as a water management structure and its continued operation underscore the importance of monitoring and maintaining dams to safeguard water resources and mitigate potential risks associated with their operation.
Year Completed |
1954 |
Dam Length |
350 |
Dam Height |
20 |
River Or Stream |
TR-PENNEL CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
81 |
Hazard Potential |
Low |
Nid Height |
20 |
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 #3