Jensen No.9
Jensen No.9 is an earth dam located in Mellette County, South Dakota, built in 1958. It carries a Low hazard potential classification.
About Jensen No.9
The primary purpose of Jensen No.9 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 Jensen (private). It impounds the Tr Cottonwood Offstream.
The dam stands 32 feet tall and stretches 424 feet across, and has a maximum storage capacity of 58 acre-feet. Completed in 1958, 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.
At 32 feet, this dam is taller than 76% of dams nationwide.
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Location
| State | South Dakota |
| County | Mellette |
| Nearest City | None |
| River/Stream | Tr Cottonwood Offstream |
| Coordinates | 43.63666, -100.93666 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 424 ft |
| Year Completed | 1958 (68 years old) |
Storage & Hydraulics
| NID Storage | 58 acre-ft |
| Max Storage | 58 acre-ft |
| Normal Storage | 50 acre-ft |
| Max Discharge | 192 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | JENSEN |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01413 |
| Federal ID | SD01413 |
| More Info | State Dam Safety Program |