Two acres of rocky reefs installed on the bottom of Lake Huron’s Thunder Bay are bolstering fish populations in an area that once was too polluted to support fish reproduction.

The reefs restored an area damaged by cement kiln dust, which flowed into Thunder Bay from a nearby cement manufacturing facility.

Whitefish and other native species are now spawning on the artificial reefs, which are expected to boost fish populations in northern Lake Huron. Read more here.