Upper Trappe River Flowage
Upper Trappe River Flowage is an earth dam located in Langlade County, Wisconsin, built in 1969. It carries a Low hazard potential classification and has a fair condition assessment.
About Upper Trappe River Flowage
Upper Trappe River Flowage is a dam in Langlade, Wisconsin. The dam is owned by Wisconsin Department Of Natural Resources (state). It impounds the Trappe.
The dam stands 12 feet tall and stretches 1,475 feet across, creates a reservoir covering 41 acres, has a maximum storage capacity of 610 acre-feet, and collects water from a drainage area of 8 square miles. Completed in 1969, 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 10/30/2018.
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Location
| State | Wisconsin |
| County | Langlade |
| Nearest City | None |
| River/Stream | Trappe |
| Coordinates | 45.13261, -89.36170 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 1,475 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 610 acre-ft |
| Max Storage | 610 acre-ft |
| Normal Storage | 380 acre-ft |
| Surface Area | 41 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 118 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Owner | Wisconsin Department of Natural Resources |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 10/30/2018 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00427 |
| Federal ID | WI00427 |
| More Info | State Dam Safety Program |