The Celilo Bridge, also called the Oregon Trunk Rail Bridge, crosses the Columbia River just south of where Celilo Falls was located. Collection includes a general plan of the bridge and a typescript description of the bridge's construction with descriptions of photographic views.

Blueprint technical drawing of Clements Tract on Sauvie Island, Oregon, with notations for the placement of iron pipes. The drawing was produced by Newell, Gossett & Walsh, a civil engineering firm based in Portland, Oregon.

Collection includes articles and photographs describing Kaplan turbines at the Bonneville Dam, 1937-1940, including descriptions of their special characteristics and installation. Also included are plans for the turbines. Paul Loveridge Heslop (1891-1956) was a mechanical engineer and chief of the Structural and Mechanical Section at the Bonneville Dam.

Drawing showing a side view of the ship L. P. Hosford, with blueline copy, by L. R. Hussa.

Collection includes correspondence, reports and articles, circa 1922-1953; plans for lumber equipment, circa 1919-1953; and charts, maps, graphs, etc., 1919-1953, regarding the lumber industry in the Pacific Northwest.

Thirteen blueline drawings on 2 sheets and lettering on 1 sheet, with duplicates, of a wagon for the Mitchell, Lewis & Staver Co., restored circa 1977.

One blueline photocopy plan on one sheet, consisting of a port side elevation of the sidewheel steamboat T. J. Potter, 1961, by G. D. Ross.

Papers of Victor Wiegand Strode include a biography by Ruth H. Strode, circa 1944, as well as patents, correspondence, drawings, and newspaper clippings regarding his inventions, including the Aeroliner and the Aerohydrocraft, 1928-1941. Also included are drawings of the Aerohydrocraft, the Aeroliner, and other miscellaneous inventions.

Twenty-one technical drawings on 21 sheets made by Floyd H. Runk for the Portland shipyard of the Kaiser Company, Inc., depicting the bow, midship, tanks and aft of T2 tankers.