DALLES, THE, a city of northern Oregon, U.S.A., on the Columbia river, 90 m. E. of Portland ; the county seat of Wasco county. It is on the Columbia River highway and is served by the Great Southern and the Union Pacific railways. Pop. (1920) 5,807 (91% native white) ; 1930 it was 5,883. A few miles above the city the mile-wide Columbia river plunges over a rocky barrier of basalt in the Celilo falls, and just below the falls it is squeezed into a narrow chasm 130-200 ft. wide. A 6 m. lock canal enables river steamers to pass these obstacles, but river traffic above the city has been inconsiderable since 192o. The Dalles is the distributing point for much of the wheat and wool grown on the great plateaux of eastern Oregon. It has fruit and salmon canneries, flour mills, planing mills, box factories and marble works. The city was founded in 1847 and incorporated in 1850.