State-murphy Dam is an earth dam located in McCone County, Montana, built in 1936. It carries a Low hazard potential classification.
Dam profile
NID height · 15 ft15 ft tall and 530 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 State-murphy Dam
State-murphy Dam is a dam in McCone, Montana. The dam is owned by State of Montana, D.n.r.c., T.l.m.d. (state). It impounds the Tr-nelson Creek near None-fort Peck Lake.
The dam stands 15 feet tall and stretches 530 feet across, creates a reservoir covering 12 acres, has a maximum storage capacity of 87 acre-feet, and collects water from a drainage area of 854 square miles. Completed in 1936, the structure is well-established, with more than 75 years of service.
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. The most recent inspection on record was 06/04/2012. That was over 14 years ago.
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Location
| State | Montana |
| County | McCone |
| Nearest City | None-fort Peck Lake |
| River/Stream | Tr-nelson Creek |
| Coordinates | 47.44670, -105.92690 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 530 ft |
| Year Completed | 1936 (90 years old) |
Storage & Hydraulics
| NID Storage | 87 acre-ft |
| Max Storage | 87 acre-ft |
| Normal Storage | 70 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 854 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | State of Montana, D.n.r.c., T.l.m.d. |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 06/04/2012 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT03966 |
| Federal ID | MT03966 |
| More Info | State Dam Safety Program |