A major conservation and infrastructure project aimed at improving fish habitat and controlling invasive species on the Sucker River is set to begin this month in northern Alger County.
Beginning June 2, construction crews will start the first phase of a two-stage initiative along County Road H-58 to replace outdated culverts with a new free-span bridge. The effort is part of a $2.35 million collaboration between local, state, and federal partners.
“This two-stage project will enhance stream health and connectivity, benefiting a wide range of native fish species,” said Cory Kovacs, Lake Superior Unit Manager with the Michigan Department of Natural Resources (DNR). “It’s a significant step forward for the fishery and the overall ecosystem.”
The project’s first phase targets two undersized and perched culverts at the H-58 crossing, which have long hindered fish movement and contributed to streambank erosion. These culverts currently block passage for species such as brook trout and suckers, while failing to deter sea lamprey — an invasive species that preys on native Great Lakes fish.
By replacing the culverts with a bridge, fish including longnose and white suckers, brook, brown, and rainbow trout, and coho and Chinook salmon will regain access to upstream spawning grounds. The improved design will also allow the river to move sediment and woody debris more naturally, reducing downstream erosion and improving overall water quality.
Construction during this initial phase is expected to last approximately 12 weeks. A temporary detour will be established along H-58 during this time.
The second phase, slated for summer 2026, will see the installation of a seasonal sea lamprey barrier farther upstream. This structure will block lamprey during their spawning season while allowing native fish to pass at other times. Officials say the new barrier will eliminate the need for lampricide treatments across 95 miles of upstream habitat, reducing both environmental impact and long-term costs.
“This project offers a rare win-win: restoring habitat for native species while improving our ability to keep invasive sea lamprey in check,” said James Farquhar, chairman of the Great Lakes Fish and Wildlife Grant Program’s Proposal Review Committee. “It’s an excellent example of how collaborative conservation can work.”
Once completed, the project is expected to boost the river’s ecological function, improve public infrastructure, and enhance fish populations for years to come.