Lake Berry Dam is an earth dam located in Gregory County, South Dakota, built in 1940. It carries a Low hazard potential classification.
Dam profile
NID height · 21 ft21 ft tall and 1,106 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 Lake Berry Dam
The primary purpose of Lake Berry Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by S&pl (state). It impounds the Willow Creek.
The dam stands 21 feet tall and stretches 1,106 feet across, creates a reservoir covering 27 acres, has a maximum storage capacity of 495 acre-feet, and collects water from a drainage area of 7 square miles. Completed in 1940, 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 10/25/2023.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | South Dakota |
| County | Gregory |
| Nearest City | None |
| River/Stream | Willow Creek |
| Coordinates | 43.08239, -99.14336 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 1,106 ft |
| Year Completed | 1940 (86 years old) |
Storage & Hydraulics
| NID Storage | 495 acre-ft |
| Max Storage | 495 acre-ft |
| Normal Storage | 148 acre-ft |
| Surface Area | 27 acres |
| Drainage Area | 7 sq mi |
| Max Discharge | 4,250 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | S&pl |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/25/2023 |
| Emergency Action Plan | No |
Identifiers
| NID ID | SD00550 |
| Federal ID | SD00550 |
| More Info | State Dam Safety Program |