The U.S. Army Corps of Engineers, Rock Island District, invites the public to an open house at the Thomson Ranger Station in Thomson, Illinois, May 29 from 1-3 p.m. with a formal ribbon cutting ceremony at 1:30 p.m. The new building, which is located near the entrance of the Thomson Causeway Recreation Area at 1600 Lewis Avenue, replaces a rented office space that the Corps occupied in downtown Thomson for more than 20 years.