The City of Washington has announced that the waste water treatment plant and yard waste center is open for residents to drop off yard waste and tree trimmings. It is open from 7 a.m. to 4 p.m. Monday through Friday and 7 to 10 a.m. on Saturday mornings during the month of May. The city reminds residents that the yard waste center does not accept lumber or building materials of any type and residents are asked to dump contents out of plastic bags and to take the bags home. Any questions can be directed to the office at 653-2638.