The US 31 Island Lake Outlet (aka “Charlevoix”) Bridge is a double-leaf bascule bridge in downtown Charlevoix, Michigan, that carries U.S. Route 31 (US 31, Bridge Street) across Island Lake Outlet. It was completed in 1949 and features 45-foot bascule leaves for a total channel width of 90 feet.
M&M was initially contracted by MDOT to perform a detailed structural, mechanical, and electrical inspection of the structure. This work was part of a larger open-end inspection contract in which M&M inspected movable bridges across Michigan. Other work for this contract included around-the-clock response to troubleshoot malfunctioning movable bridge systems and scheduled in-depth inspections of particular bridge components.
M&M was then contracted to repair the rolling lift girders and replace the submarine cable for the bridge. Work included track and tread repair for the rolling lift girders, installing a new submarine cable, integrating a new far side PLC based control with the near side relay-based controller, and permitting assistance.
Preservation of this historic structure continues to be a high priority for MDOT. M&M’s successful efforts to maintain this critical link will help ensure reliable service life for many years to come.
Bridge Geometry
| Length of Main Span | 90 feet |
|---|---|
| Total Project Length | 100 ft |
| Lanes on Structure | 4 lanes, 2 pedestrian sidewalks |
