The navigation lock at John Day Dam near Rufus reopened to river traffic over the weekend, and The Dalles Dam lock should return to service late Monday night. The U.S. Army Corps of Engineers is nearing the scheduled end of an extended navigation lock maintenance outage, which began December 12. The 14-week-long closure has affected all eight Corps navigation locks on the Columbia and Snake rivers. Bonneville Lock and Dam reopened in February, and McNary reopened Friday. The Dalles, Lower Monumental, and Lower Granite locks and dams remain scheduled to return to service at 11:59 p.m. Monday. On the Snake River, the Ice Harbor Dam navigation lock is tentatively scheduled to return to service Thursday night, and the lock at Little Goose Dam is currently estimated to reopen on April 2.