Summary
This earth dam, designed by USDA NRCS, was completed in 1960 and stands at a height of 15 feet with a length of 400 feet. It serves multiple purposes including fire protection, stock watering, and as a small fish pond, with a storage capacity of 117 acre-feet.
Situated on Dolson Coulee, Tarum is regulated by the Montana Department of Natural Resources Conservation (DNRC) and is subject to state permitting, inspection, and enforcement. The dam has a low hazard potential and a moderate risk assessment rating. The spillway, which is uncontrolled, has a width of 140 feet and a maximum discharge capacity of 700 cubic feet per second.
For water resource and climate enthusiasts, Tarum provides a fascinating case study of a privately owned dam that plays a crucial role in the local ecosystem. With its multiple functions and regulatory oversight, Tarum exemplifies the intersection of water management, environmental protection, and public safety in the state of Montana.
Year Completed |
1960 |
Dam Length |
400 |
Dam Height |
15 |
River Or Stream |
DOLSON COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Drainage Area |
6.55 |
Nid Storage |
117 |
Hazard Potential |
Low |
Nid Height |
15 |
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.
Tarum