Lower Nine Mile is a gravity dam located in Oneida County, Wisconsin, built in 1907. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 12 ft12 ft tall and 186 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 Lower Nine Mile
The primary purpose of Lower Nine Mile is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is owned by Wisconsin Valley Improvement Company (private). It impounds the Nine Mile Creek.
The dam stands 12 feet tall and stretches 186 feet across, has a maximum storage capacity of 2,617 acre-feet, and collects water from a drainage area of 29 square miles. Completed in 1907, the structure is over a century old.
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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 06/13/2018.
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Location
| State | Wisconsin |
| County | Oneida |
| River/Stream | Nine Mile Creek |
| Coordinates | 45.89290, -89.12120 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 186 ft |
| Year Completed | 1907 (119 years old) |
Storage & Hydraulics
| NID Storage | 2,617 acre-ft |
| Max Storage | 2,617 acre-ft |
| Drainage Area | 29 sq mi |
| Max Discharge | 704 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Wisconsin Valley Improvement Company |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/13/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WI00773 |
| Federal ID | WI00773 |
| More Info | State Dam Safety Program |