J Jacobsen #2
J Jacobsen #2 is an earth dam located in Daniels County, Montana, built in 1969. It carries a Low hazard potential classification.
About J Jacobsen #2
The primary purpose of J Jacobsen #2 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by John Jacobsen (private). It impounds the Tr-smoke Creek near Blair.
The dam stands 7 feet tall and stretches 660 feet across, has a maximum storage capacity of 64 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1969, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
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Location
| State | Montana |
| County | Daniels |
| Nearest City | Blair |
| River/Stream | Tr-smoke Creek |
| Coordinates | 48.59336, -105.10497 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 7 ft |
| Dam Height | 7 ft |
| Dam Length | 660 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 64 acre-ft |
| Max Storage | 64 acre-ft |
| Normal Storage | 12 acre-ft |
| Drainage Area | 2 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | JOHN JACOBSEN |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT02637 |
| Federal ID | MT02637 |
| More Info | State Dam Safety Program |