Summary
Constructed in 1905, this earth dam stands at a height of 19 feet and spans 660 feet in length. With a storage capacity of 106 acre-feet, Lohman primarily regulates the flow of Coal Coulee, a vital water resource in Hill County.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Lohman is crucial for maintaining water levels for various local needs. Despite its low hazard potential, the dam's condition assessment is currently not rated, highlighting the need for regular inspections and potential risk management measures. Its geographic coordinates of 48.6574° N, -109.7587° W make it a key location for water resource and climate enthusiasts to study and monitor for its impact on the surrounding ecosystem.
As part of the Omaha District of the US Army Corps of Engineers, Lohman's influence on the region's water supply and ecological balance cannot be understated. With its historical significance dating back over a century, this dam stands as a testament to human engineering and its ongoing role in sustaining the environment. Researchers and policymakers alike can benefit from studying Lohman as a case study in water resource management and climate adaptation strategies in the face of changing environmental conditions.
Year Completed |
1905 |
Dam Length |
660 |
Dam Height |
19 |
River Or Stream |
COAL COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
19 |
Nid Storage |
106 |
Hazard Potential |
Low |
Nid Height |
19 |
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.
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Lohman