Garrett Dam is an earth dam located in Sully County, South Dakota, built in 1980. It carries a Low hazard potential classification.
Dam profile
NID height · 64 ft64 ft tall and 600 ft long, taller than 96% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Garrett Dam
The primary purpose of Garrett Dam 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 Missouri River Investments (private). It impounds the Tr-okobojo Creek.
The dam stands 64 feet tall and stretches 600 feet across, has a maximum storage capacity of 5,000 acre-feet, and collects water from a drainage area of 12 square miles. Completed in 1980, the structure is 46 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. The most recent inspection on record was 07/27/1992. That was over 34 years ago.
At 64 feet, this dam is taller than 96% of all dams in the United States.
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Location
| State | South Dakota |
| County | Sully |
| Nearest City | None |
| River/Stream | Tr-okobojo Creek |
| Coordinates | 44.64805, -100.48499 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 64 ft |
| Dam Height | 64 ft |
| Dam Length | 600 ft |
| Year Completed | 1980 (46 years old) |
Storage & Hydraulics
| NID Storage | 5,000 acre-ft |
| Max Storage | 5,000 acre-ft |
| Normal Storage | 1,090 acre-ft |
| Drainage Area | 12 sq mi |
| Max Discharge | 9,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Missouri River Investments |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 07/27/1992 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02357 |
| Federal ID | SD02357 |
| More Info | State Dam Safety Program |