Delton
Delton is a gravity dam located in Sauk County, Wisconsin, built in 1931. It carries a Low hazard potential classification and has a fair condition assessment.
About Delton
The primary purpose of Delton is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Sauk County (local government). It impounds the Dell Creek near Lake Delton.
The dam stands 19 feet tall and stretches 150 feet across, creates a reservoir covering 137 acres, has a maximum storage capacity of 1,280 acre-feet, and collects water from a drainage area of 71 square miles. Completed in 1931, 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. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 06/16/2020.
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Location
| State | Wisconsin |
| County | Sauk |
| Nearest City | Lake Delton |
| River/Stream | Dell Creek |
| Coordinates | 43.58447, -89.79737 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 150 ft |
| Year Completed | 1931 (95 years old) |
Storage & Hydraulics
| NID Storage | 1,280 acre-ft |
| Max Storage | 1,280 acre-ft |
| Normal Storage | 870 acre-ft |
| Surface Area | 137 acres |
| Drainage Area | 71 sq mi |
| Max Discharge | 2,790 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Sauk County |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 06/16/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00190 |
| Federal ID | WI00190 |
| More Info | State Dam Safety Program |