Thornapple
Low HazardSatisfactory ConditionEmergency Action Plan: Not Required
Location
| State | Wisconsin |
| County | Rusk |
| Nearest City | Holcombe |
| River/Stream | Flambeau |
| Coordinates | 45.41070, -91.21670 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 530 ft |
| Year Completed | 1909 (117 years old) |
Storage & Hydraulics
| NID Storage | 2,400 acre-ft |
| Max Storage | 2,400 acre-ft |
| Normal Storage | 1,000 acre-ft |
| Surface Area | 295 acres |
| Drainage Area | 1,850 sq mi |
| Max Discharge | 19,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Northern States Power Co |
| Owner Type | Public Utility |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/07/2022 |
| Emergency Action Plan | Not Required |