Dells Manor is a gravity dam located in Sauk County, Wisconsin, built in 1929. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 24 ft24 ft tall and 100 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Dells Manor
The primary purpose of Dells Manor is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Camp Chi (private). It impounds the Spring Brook near Lake Delton.
The dam stands 24 feet tall and stretches 100 feet across, creates a reservoir covering 34 acres, has a maximum storage capacity of 460 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1929, 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 09/30/2014. That was over 12 years ago.
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Location
| State | Wisconsin |
| County | Sauk |
| Nearest City | Lake Delton |
| River/Stream | Spring Brook |
| Coordinates | 43.59551, -89.80609 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 100 ft |
| Year Completed | 1929 (97 years old) |
Storage & Hydraulics
| NID Storage | 460 acre-ft |
| Max Storage | 460 acre-ft |
| Normal Storage | 258 acre-ft |
| Surface Area | 34 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 1,500 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Camp Chi |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 09/30/2014 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00708 |
| Federal ID | WI00708 |
| More Info | State Dam Safety Program |