The Tulsa District, U.S. Army Corps of Engineers will host an open house workshop from 6:00-8:00 p.m., April 15, 2014 related to the review and revision of the project master plan (MP) for Fort Gibson Lake, Mayes, Wagoner, and Cherokee Counties, Okla. The open house will be held at the City of Wagoner Civic Center, 301 South Grant Avenue, Wagoner, Okla., 74467.