New spawning reefs to boost native fish in St. Clair River
Construction of two new fish-spawning reefs is about to begin in the St. Clair River northeast of Detroit, the latest chapter in a decade-plus effort to restore native species such as lake sturgeon, walleye and lake whitefish.
The new reefs will be built this summer and fall at two locations on the St. Clair. The goal of the University of Michigan-led project is to boost fish populations by providing river-bottom rock structures suitable for spawning.
The crevice-filled rock beds are designed to mimic the natural limestone reefs that existed before the rivers connecting lakes Huron and Erie were dredged and blasted to create shipping canals, and before an increased flow of sediments into the system from agricultural and urban runoff.
Construction of the Harts Light Reef is scheduled to begin this week and is expected to last eight to 12 weeks. The site is adjacent to East China, between St. Clair and Marine City. Work at the Pointe Aux Chenes site, which is between Algonac and Russell Island, will likely begin in September and is expected to last six to eight weeks.
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