Lyle Nelson #8 is an earth dam located in McCone County, Montana, built in 1969. It carries a Low hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 240 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Lyle Nelson #8
The primary purpose of Lyle Nelson #8 is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Lyle E Nelson (private). It impounds the Tr-north Fork Rock Creek.
The dam stands 20 feet tall and stretches 240 feet across, has a maximum storage capacity of 237 acre-feet, and collects water from a drainage area of 0 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 | McCone |
| Nearest City | None |
| River/Stream | Tr-north Fork Rock Creek |
| Coordinates | 47.76480, -106.16810 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 240 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 237 acre-ft |
| Max Storage | 237 acre-ft |
| Normal Storage | 121 acre-ft |
| Drainage Area | 0 sq mi |
| Max Discharge | 2,000 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Lyle E Nelson |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT02991 |
| Federal ID | MT02991 |
| More Info | State Dam Safety Program |