This month the City of Washington’s Waste Water Treatment Plant and Yard Waste Center will be open Saturday mornings. Beginning tomorrow the center will be open from 7 a.m. to 10 a.m. During the week, the center is also open for residents to drop off yard waste and tree trimmings from 7 a.m. to 4 p.m. The center does not accept lumber or building materials. It is located at 1065 West Buchanan Street.