Green River

Spicer Group worked with the Conservation Resource Alliance to design the removal of an aging dam and improve fish passage along a stretch of the Green River in Antrim County—a designated trout stream and tributary of the Jordan River. The design included replacing the original sheetpile dam with a rock barrier. Excess water now flows around the barrier and naturally downstream over a newly constructed channel made of rocks and boulders. The new channel drops more than 10 feet over a approximate reach length of 300 feet and has alternating riffles and pools to give fish a resting area while migrating up or downstream. Additional migration habitat was achieved by placing two-to four-foot diameter boulders over the span to reduce stream velocities and flow uniformity.