Dimock is an earth dam located in Hutchinson County, South Dakota, built in 1937. It carries a Low hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 960 ft long, taller than 68% 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 Dimock
The primary purpose of Dimock is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Gf&p (state). It impounds the Trjames near Olivet Sd.
The dam stands 30 feet tall and stretches 960 feet across, creates a reservoir covering 72 acres, has a maximum storage capacity of 1,900 acre-feet, and collects water from a drainage area of 105 square miles. Completed in 1937, 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 10/04/2022.
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Location
| State | South Dakota |
| County | Hutchinson |
| Nearest City | Olivet Sd |
| River/Stream | Trjames |
| Coordinates | 43.47622, -97.91812 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 960 ft |
| Year Completed | 1937 (89 years old) |
Storage & Hydraulics
| NID Storage | 1,900 acre-ft |
| Max Storage | 1,900 acre-ft |
| Normal Storage | 625 acre-ft |
| Surface Area | 72 acres |
| Drainage Area | 105 sq mi |
| Max Discharge | 7,100 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Gf&p |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/04/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00695 |
| Federal ID | SD00695 |
| More Info | State Dam Safety Program |