It was the maps produced by these expeditions that Lewis and Clark used when they descended the lower Columbia to the Pacific coast.

During this time, he surveyed and mapped much of the lower Columbia and the highlands on both sides of the river.

Parts of the lower Columbia seem to have experienced a blizzard, as related from Westport:

Right now, it's Portland, and part of the lower Columbia.

It was here that the expedition first made significant contact and commerce with the Chinookan-speaking peoples of the lower Columbia.

The line ran steamboats on the lower Columbia from 1914 to 1937, when it was forced into bankruptcy.

From 1938 to 1975, eight Federal dams were built on the lower Columbia and Snake Rivers.

In 1990 a new round of studies examined the possibility of further dredging on the lower Columbia.

Opposition to O.R.& N. began to arise in 1881 on the lower and middle Columbia.

Now much of the lower Columbia looks more as it did 200 years ago.