7-up Sea is an earth dam located in Fallon County, Montana, built in 1949. It carries a Low hazard potential classification.
Dam profile
NID height · 25 ft25 ft tall and 350 ft long, taller than 50% of U.S. dams with a recorded height. 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 7-up Sea
The primary purpose of 7-up Sea is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by James/frank Sparks (private). It impounds the Tr-lame Jones Creek near Ismay.
The dam stands 25 feet tall and stretches 350 feet across, has a maximum storage capacity of 90 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1949, 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.
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Location
| State | Montana |
| County | Fallon |
| Nearest City | Ismay |
| River/Stream | Tr-lame Jones Creek |
| Coordinates | 46.20090, -104.63980 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 350 ft |
| Year Completed | 1949 (77 years old) |
Storage & Hydraulics
| NID Storage | 90 acre-ft |
| Max Storage | 90 acre-ft |
| Normal Storage | 46 acre-ft |
| Drainage Area | 0 sq mi |
| Max Discharge | 600 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | James/frank Sparks |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT02394 |
| Federal ID | MT02394 |
| More Info | State Dam Safety Program |