Nielsen
Nielsen is an earth dam located in Rosebud County, Montana, built in 1973. It carries a Low hazard potential classification.
About Nielsen
The primary purpose of Nielsen is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Larsen Ranch (private). It impounds the Coal Creek near Hathaway.
The dam stands 31 feet tall and stretches 666 feet across, and has a maximum storage capacity of 80 acre-feet. Completed in 1973, 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 | Rosebud |
| Nearest City | Hathaway |
| River/Stream | Coal Creek |
| Coordinates | 46.25160, -106.26590 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 666 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 80 acre-ft |
| Max Storage | 80 acre-ft |
| Normal Storage | 65 acre-ft |
| Max Discharge | 100 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | LARSEN RANCH |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT00074 |
| Federal ID | MT00074 |
| More Info | State Dam Safety Program |