Green Lake Dam Removal

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 an 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.