- Lafayette, Oregon, offers convenient options for RV dumping.- The Wastewater Treatment Plant in Lafayette is a reliable choice for black water and gray water disposal.- For freshwater refill and hose for flushing tanks, head to the Newberg Waste Water Treatment - City of Newberg RV Dump Site.- If you're looking for a nearby option, the Portland-Woodburn RV Park provides dump station services.- Another option is the Portland Woodburn RV Park, which offers an RV trash bin and waste disposal facilities.