Tomahawk Left Detached Embankment
Tomahawk Left Detached Embankment is an earth dam located in Lincoln County, Wisconsin, built in 1938. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Tomahawk Left Detached Embankment
The primary purpose of Tomahawk Left Detached Embankment 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 Public Service Corporation (public utility). It impounds the Wisconsin River near Merrill.
The dam stands 27 feet tall and stretches 2,050 feet across, creates a reservoir covering 2,773 acres, has a maximum storage capacity of 15,180 acre-feet, and collects water from a drainage area of 2,028 square miles. 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 08/04/2021.
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Location
| State | Wisconsin |
| County | Lincoln |
| Nearest City | Merrill |
| River/Stream | Wisconsin River |
| Coordinates | 45.44450, -89.72580 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 20 ft |
| Dam Length | 2,050 ft |
| Year Completed | 1938 (88 years old) |
Storage & Hydraulics
| NID Storage | 15,180 acre-ft |
| Max Storage | 15,180 acre-ft |
| Normal Storage | 15,180 acre-ft |
| Surface Area | 2,773 acres |
| Drainage Area | 2,028 sq mi |
| Max Discharge | 54,000 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Wisconsin Public Service Corporation |
| Owner Type | Public Utility |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/04/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00746 |
| Federal ID | WI00746S001 |
| More Info | State Dam Safety Program |