Umatilla, Oregon – The U.S. Army Corps of Engineers’ Walla Walla District will begin construction this summer to connect the McNary Dam wastewater sewer system to the City of Umatilla sewer system. During the construction effort there will be temporary closures and detours affecting 3rd Street, West Park, Spillway Park, and the Visitor Center/Juvenile Fish Facility. Look for additional news releases as construction progresses with closure details and dates.