Black and white aerial photographs, taken from December 23, 1964, to January 16, 1965, of rivers and cities affected by the Christmas Day flood in the Pacific Northwest, primarily in Oregon. Also includes scenes of bridges and dams.

Blueprint and diazo copies of plans for projects in Oregon and Washington, including the Willamette Falls locks; modifications to a dam and lock on the Yamhill River; gun emplacements at Fort Stevens; and a Spokane, Portland and Seattle Railway station and water tower. The U.S. Army Corps of Engineers is a hybrid military-civilian organization that has played a role in developing Oregon's water infrastructure since the 1860s, and which established an office in Portland, Oregon, in 1871.

Manuscript and typescript routine correspondence to Captain Charles F. Powell, Captain of Engineers, at Portland, Oregon, 1886-1888, mainly regarding commerce at and between Fort Canby, Washington, and Fort Stevens, Oregon.