Lake of the Dells is an earth dam located in Sauk County, Wisconsin, built in 1938. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 16 ft16 ft tall. 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 of the Dells
Lake of the Dells is a dam in Sauk, Wisconsin. The dam is owned by Dells Boat Co., Inc. (private). It impounds the Unnamed Trib to Wisconsin R.
The dam stands 16 feet tall, creates a reservoir covering 14 acres, and has a maximum storage capacity of 74 acre-feet. Completed in 1938, 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. The most recent inspection on record was 08/05/2021.
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Location
| State | Wisconsin |
| County | Sauk |
| River/Stream | Unnamed Trib to Wisconsin R |
| Coordinates | 43.61160, -89.77722 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Year Completed | 1938 (88 years old) |
Storage & Hydraulics
| NID Storage | 74 acre-ft |
| Max Storage | 74 acre-ft |
| Surface Area | 14 acres |
Ownership & Safety
| Owner | Dells Boat Co., Inc. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 08/05/2021 |
| Emergency Action Plan | No |
Identifiers
| NID ID | WI01224 |
| Federal ID | WI01224 |
| More Info | State Dam Safety Program |