Okaton Dam is an earth dam located in Jones County, South Dakota, built in 1930. It carries a Low hazard potential classification.
Dam profile
NID height · 22 ft22 ft tall and 600 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 Okaton Dam
The primary purpose of Okaton 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 S&pl (state). It impounds the Trib. Dry Creek.
The dam stands 22 feet tall and stretches 600 feet across, and has a maximum storage capacity of 320 acre-feet. Completed in 1930, 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 09/27/2023.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | South Dakota |
| County | Jones |
| Nearest City | None |
| River/Stream | Trib. Dry Creek |
| Coordinates | 43.92103, -100.90201 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 600 ft |
| Year Completed | 1930 (96 years old) |
Storage & Hydraulics
| NID Storage | 320 acre-ft |
| Max Storage | 320 acre-ft |
| Normal Storage | 200 acre-ft |
| Max Discharge | 2,900 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | S&pl |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 09/27/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02336 |
| Federal ID | SD02336 |
| More Info | State Dam Safety Program |