Story

The Cheboygan Lock modernization project represents a critical investment in Michigan’s inland waterway infrastructure—both preserving a historically significant navigation system and ensuring its long-term operability and safety. Originally constructed in 1869, the lock serves as one of only two on the inland route between Lake Michigan and Lake Huron, facilitating the passage of approximately 4,000 recreational boats annually. It plays a vital role in maintaining water levels between the Cheboygan River and Lake Huron, supporting safe navigation, stable shorelines, and vibrant local tourism.

This project extended far beyond surface-level upgrades. The work included full refurbishment of the hydraulic operating system, epoxy recoating of the massive steel miter gates, and complete replacement of lock floor, wall, and walkway concrete—some of which dated back nearly a century. The team also replaced aging sluice and sprue gates, added modern stainless-steel hydraulic distribution tubing, installed steel platforms, aluminum railings, and upgraded the control panel and safety systems.

Due to its location—basically on an island—the project required extraordinary planning and logistics. Heavy equipment and materials were brought in by crane, and site access relied on an aging wooden bridge with strict weight limits. A custom platform was constructed over the full lock chamber to allow for piezometer installation before dewatering, and much of the work occurred during harsh winter conditions. A temporary heated enclosure was built to protect work areas and ensure proper curing of new concrete.

Unexpected conditions, such as thinner-than-anticipated shotcrete and a historic ice storm that caused site flooding, posed significant challenges. Still, the team maintained schedule integrity through strategic shifts, extended work hours, and technical creativity. Continuous dewatering, coordination with dive teams, and high-level safety protocols were integral to keeping the project on track.

This restoration ensures that the Cheboygan Lock can continue to safely and reliably support navigation, public recreation, and regional heritage for decades to come—while introducing modern systems that improve both function and long-term durability.