Stateline Flowage
Stateline Flowage is an earth dam located in Douglas County, Wisconsin, built in 1970. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Stateline Flowage
The primary purpose of Stateline Flowage is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Douglas County (local government). It impounds the West Branch Hay Creek.
The dam stands 8 feet tall and stretches 1,300 feet across, creates a reservoir covering 58 acres, has a maximum storage capacity of 230 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1970, the structure is well into its service life at over 50 years 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. An emergency action plan is in place for this dam. The most recent inspection on record was 08/19/2021.
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Location
| State | Wisconsin |
| County | Douglas |
| Nearest City | None |
| River/Stream | West Branch Hay Creek |
| Coordinates | 46.29520, -92.29261 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 1,300 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 230 acre-ft |
| Max Storage | 230 acre-ft |
| Normal Storage | 120 acre-ft |
| Surface Area | 58 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 109 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Douglas County |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/19/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00940 |
| Federal ID | WI00940 |
| More Info | State Dam Safety Program |