Hayward is a rockfill dam located in Sawyer County, Wisconsin, built in 1925. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 20 ft20 ft tall and 424 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic rockfill embankment section and the water level is illustrative.
About Hayward
The primary purpose of Hayward 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 Northern States Power Co (public utility). It impounds the Namekagon River near Hayward.
The dam stands 20 feet tall and stretches 424 feet across, creates a reservoir covering 240 acres, has a maximum storage capacity of 1,900 acre-feet, and collects water from a drainage area of 206 square miles. Completed in 1925, 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 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 09/21/2022.
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Location
| State | Wisconsin |
| County | Sawyer |
| Nearest City | Hayward |
| River/Stream | Namekagon River |
| Coordinates | 46.00660, -91.48440 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 424 ft |
| Year Completed | 1925 (101 years old) |
Storage & Hydraulics
| NID Storage | 2,000 acre-ft |
| Max Storage | 1,900 acre-ft |
| Normal Storage | 2,000 acre-ft |
| Surface Area | 240 acres |
| Drainage Area | 206 sq mi |
| Max Discharge | 1,395 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Northern States Power Co |
| Owner Type | Public Utility |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 09/21/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WI00795 |
| Federal ID | WI00795 |
| More Info | State Dam Safety Program |