Lewis R. Freeman, Down the Columbia
“ Celilo Falls is a replica on a reduced scale of the Horse-shoe cataract at Niagara. At middle and low-water there is a drop of twenty feet here, but at the flood-stage of early summer the fall is almost wiped out in the lake backed up from the head of the Tumwater gorge of the Dalles. The Dalles then form one practically continuous rapid, eight or nine miles in length, with many terrific swirls and whirlpools, but with all rocks so deeply submerged that it is possible for a well-handled steamer to run through in safety—provided she is lucky. ”
