The City of Washington Waste Water Treatment Plant and Yard Waste Center is no longer open on Saturday mornings. Normal operating hours were put into effect Tuesday. Washington residents can drop of yard waste during normal hours, 7 a.m. to 4 p.m. Monday through Friday. Also, the center does not accept lumber or building materials and if plastic bags are used, residents are reminded to dump contents out of the bags and take the bags with. “If you didn’t grow it, don’t throw it.” Any questions should be directed to the Waste Water Treatment Plant at 653-2638.