Iehl Reservoir Report
Nearby: Brain Tillman #1 (Dawson)
Last Updated: December 13, 2025
Iehl is a privately owned earth dam located in Intake, Montana, along Lower Sevenmile Creek.
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Summary
Built in 1945, this dam serves multiple purposes including fire protection, stock, and creating a small fish pond. With a height of 25 feet and a storage capacity of 39 acre-feet, Iehl plays a crucial role in providing water resources for the local community while also minimizing the risk of potential hazards.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Iehl is regulated, permitted, inspected, and enforced by the state to ensure its structural integrity and safety. Despite being classified as having a low hazard potential, the dam's condition assessment is currently not rated. With its location in a remote area of Dawson County, Montana, Iehl is a key component of the local water infrastructure, contributing to the overall water resource management in the region.
While lacking recent inspection data and emergency preparedness measures, Iehl remains an important asset for water storage and management in the area. As climate change continues to impact water resources, the maintenance and upkeep of structures like Iehl will be crucial in ensuring water security and resilience in the face of changing environmental conditions. Enthusiasts and stakeholders interested in water resource management and climate adaptation will find Iehl to be a fascinating case study in the intersection of infrastructure, regulation, and environmental stewardship.
Year Completed |
1945 |
Dam Length |
100 |
Dam Height |
25 |
River Or Stream |
LOWER SEVENMILE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Nid Storage |
39 |
Hazard Potential |
Low |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Yellowstone River At Glendive Mt
|
6000cfs |
Redwater River At Circle Mt
|
1cfs |
Yellowstone River Near Sidney Mt
|
6130cfs |
Beaver Creek Nr Trotters
|
0cfs |
Missouri River Near Wolf Point Mt
|
5020cfs |
Nelson Creek Near Van Norman Mt
|
33cfs |
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.
Iehl