Middle Trappe River Flowage
Middle 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 poor condition assessment.
About Middle Trappe River Flowage
Middle 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 10 feet tall and stretches 800 feet across, creates a reservoir covering 32 acres, has a maximum storage capacity of 260 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. 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 | 45.13102, -89.36665 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 800 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 260 acre-ft |
| Max Storage | 260 acre-ft |
| Normal Storage | 130 acre-ft |
| Surface Area | 32 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 469 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Other |
| Owner | Wisconsin Department of Natural Resources |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 10/30/2018 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00426 |
| Federal ID | WI00426 |
| More Info | State Dam Safety Program |