J Jacobsen #2 Reservoir Report
Nearby: J Jacobsen #1 Stentoft
Last Updated: December 19, 2025
J Jacobsen #2 is a privately owned earth dam located in Blair, Montana, along the TR-Smoke Creek.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1969 by the USDA NRCS, this dam serves the primary purpose of flood risk reduction, with a NID storage capacity of 64 acre-feet. With a low hazard potential and a height of 7 feet, this dam plays a crucial role in protecting the surrounding area from potential flooding events.
Situated within Daniels County, Montana, J Jacobsen #2 is regulated by the state and falls under the jurisdiction of the DNRC. The dam is inspected, permitted, and enforced by the state, ensuring its structural integrity and functionality in reducing flood risks for the community. With a length of 660 feet and a spillway width of 340 feet, this dam is equipped to handle potential water discharges efficiently, further enhancing its flood risk reduction capabilities.
Although the condition of J Jacobsen #2 is currently listed as "Not Rated," its strategic location and design by the USDA NRCS provide a sense of security for the residents of Blair and the surrounding area. As a vital piece of infrastructure in the region, this dam stands as a testament to effective water resource management and climate resilience efforts in Montana.
Year Completed |
1969 |
Dam Length |
660 |
Dam Height |
7 |
River Or Stream |
TR-SMOKE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
7 |
Drainage Area |
2.34 |
Nid Storage |
64 |
Hazard Potential |
Low |
Nid Height |
7 |
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.
J Jacobsen #2