Jensen Number 7 is an earth dam located in Mellette County, South Dakota, built in 1969. It carries a Low hazard potential classification.
Dam profile
NID height · 29 ft29 ft tall and 340 ft long, taller than 65% 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 Jensen Number 7
The primary purpose of Jensen Number 7 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 Wm Jensen (private). It impounds the Tr of Cottonwood Offstream.
The dam stands 29 feet tall and stretches 340 feet across, and has a maximum storage capacity of 21 acre-feet. 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.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | South Dakota |
| County | Mellette |
| Nearest City | None |
| River/Stream | Tr of Cottonwood Offstream |
| Coordinates | 43.61666, -100.84666 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 340 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 21 acre-ft |
| Max Storage | 21 acre-ft |
| Normal Storage | 15 acre-ft |
| Max Discharge | 437 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Wm Jensen |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01250 |
| Federal ID | SD01250 |
| More Info | State Dam Safety Program |