The Washington &Great Northern Railway was a going concern until the copper market slump following World War I and the general economic depression of the thirties forced abandonment of the line between Grand Forks, B.C. and Oroville, Washington in 1935. The remaining portion carried ore from a mine in Hedley, B.C.to the Great Northernís Oroville - Wenatchee branch until 1956. The Burlington Northern Railroad ran the occasional train over the Washington & Great Northern right of way along the Similkameen between Oroville and the Candian border until the wooden truss bridge near Nighthawk, the last on a Washington state railroad, collapsed in 1980. The piers of the Nighthawk bridge, a tunnel through the flank of Bullfrog Mountain at Shankers Bend and this impressive plate girder bridge across the Similkameen, just west of Oroville, are the only physical remains of the Washington & Great Northern.