The U.S. Army Corps of Engineers, St. Paul District, is hosting an open house to discuss the McGregor Lake habitat rehabilitation and enhancement project, April 22 at Prairie du Chien public library from 5-7 p.m. The public is welcome to drop in to learn more and meet with staff. There will be no formal presentation. The library is located at 125 S Wacouta Ave., Prairie du Chien, Wisconsin.