Furnace Bridge

About Furnace Bridge

The primary purpose of Furnace Bridge is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City Of Mayville (local government). It impounds the East Branch Rock near Mayville.

The dam stands 14 feet tall and stretches 180 feet across, creates a reservoir covering 17 acres, has a maximum storage capacity of 140 acre-feet, and collects water from a drainage area of 172 square miles. Completed in 1848, the structure is one of the older dams in the region, with over a century and a half of service.

This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in 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 03/19/2021.

Search for dams near your address to see all dams in your area with hazard classifications and safety data.