Jensen Reservoir (Dawson) Reservoir Report
Nearby: Jonas #2 Jensen No 3 (Dawson)
Last Updated: December 6, 2025
Jensen Reservoir (Dawson) is a privately owned irrigation reservoir located in Poplar, Montana.
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Summary
Managed by the USDA NRCS, this earth dam structure was completed in 1951 and has a maximum storage capacity of 355 acre-feet. Situated on Corral Creek, the reservoir covers a surface area of 31 acres and serves the primary purpose of irrigation in the region.
With a dam height of 19 feet and a spillway width of 100 feet, Jensen Reservoir poses a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. Despite being state regulated and inspected, the reservoir does not have an Emergency Action Plan (EAP) in place. The reservoir's drainage area covers 9.37 square miles, and it has a maximum discharge capacity of 1000 cubic feet per second.
Water resource and climate enthusiasts will appreciate Jensen Reservoir for its role in supporting agricultural irrigation in the area. The reservoir's location in Dawson County, Montana, makes it a vital water management resource in the region. While it may not have a high hazard potential, its significance in providing water for irrigation purposes underscores the importance of maintaining and monitoring its condition for sustainable water use in the future.
Year Completed |
1951 |
Dam Length |
200 |
Dam Height |
19 |
River Or Stream |
CORRAL CREEK |
Primary Dam Type |
Earth |
Surface Area |
31 |
Hydraulic Height |
15 |
Drainage Area |
9.37 |
Nid Storage |
355 |
Hazard Potential |
Low |
Nid Height |
19 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Redwater River At Circle Mt
|
1cfs |
Yellowstone River At Glendive Mt
|
6000cfs |
Nelson Creek Near Van Norman Mt
|
33cfs |
Missouri River Near Wolf Point Mt
|
5020cfs |
Poplar River Near Poplar Mt
|
28cfs |
Yellowstone River Near Sidney Mt
|
6130cfs |
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.
Jensen Reservoir (Dawson)