Upper Horicon is an earth dam located in Dodge County, Wisconsin, built in 1945. It carries a Low hazard potential classification.
Dam profile
NID height · 8 ft8 ft tall and 21,700 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 Upper Horicon
The primary purpose of Upper Horicon is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by U.s. Department of the Interior (federal). It impounds the Main Ditch near Horicon.
The dam stands 8 feet tall and stretches 21,700 feet across, creates a reservoir covering 320 acres, has a maximum storage capacity of 1,600 acre-feet, and collects water from a drainage area of 220 square miles. Completed in 1945, 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.
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Location
| State | Wisconsin |
| County | Dodge |
| Nearest City | Horicon |
| River/Stream | Main Ditch |
| Coordinates | 43.52408, -88.64456 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 21,700 ft |
| Year Completed | 1945 (81 years old) |
Storage & Hydraulics
| NID Storage | 1,600 acre-ft |
| Max Storage | 1,600 acre-ft |
| Normal Storage | 600 acre-ft |
| Surface Area | 320 acres |
| Drainage Area | 220 sq mi |
| Max Discharge | 1,470 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | U.s. Department of the Interior |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | No |
Identifiers
| NID ID | WI00829 |
| Federal ID | WI00829 |
| More Info | State Dam Safety Program |