Beginning next weekend, the City of Washington’s Waste Water Tretment Plant and Yard Waste Center will be open Saturday mornings. Currently the center is open from 7 a.m. to 4 p.m. Monday through Friday for residents to drop off yard waste and tree trimmings. Saturdays in May it will be open from 7 a.m. to 10 a.m. The center does not accept lumber or building materials. It is located at 1065 West Buchanan Street.