Papers of the architect Thomas "Thom" Hacker (1941-2023), primarily architectural sketches and drawings relating to his projects. Hacker taught at the University of Oregon in Eugene, Oregon, in the 1970s, and later headed an architectural firm in Portland, Oregon.

Photocopies of plans by architect George F. Hammond of Cleveland, Ohio, for an American Chicle Company warehouse at Johnson and 14th streets (now NW Johnson Street and NW 14th Avenue) in Portland, Oregon.

Blueprints and original drawings of architectural plans, mostly for unidentified buildings, by the Portland, Oregon architect Justus F. Krumbein (1847-1907). These plans date from the period starting in the late 1870s when Krumbein worked independently. Krumbein notably helped design the Oregon State Capitol of 1876 with W. G. Gilbert.

Blueprint plans and illustrations of buildings designed by the architectural firm Lawrence & Holford, which operated in Portland, Oregon, in the 1910s and 1920s. The firm was later named Lawrence, Holford, Allyn & Bean, and then Lawrence, Holford & Allyn.

Collection consists of 1 color rendering on 1 sheet by the Austin Co. of a building for the Lloyd Corporation in Portland, Oregon. The building includes a theatre, office, and store.

Ink illustrations of historic buildings in Portland, Oregon; Astoria, Oregon; Forest Grove, Oregon; and Salt Lake City, Utah, by the architect Willard K. Martin (1930-1985). Martin was a Portland-based architect who was most known for his role in designing Pioneer Courthouse Square.

Collection includes 1 drawing by architect Carl L. Linde of a nine-story apartment building (the Ambassador Apartments), next to the University Club in Portland, for Donald B. McBride and Richard F. Wassell.

Collection consists of architectural plans and drawings for the Administration Building, also known as the Old Holladay School, for School District No. 1 (Portland School District) at 1343 NE 9th Ave., Portland, Oregon, by architect George Howell Jones. The site later became the location of the Lloyd Center.

Plans and drawings for streetcars, trains, and buses, as well as for related buildings of streetcar and railroad companies. Many of the plans in this collection were either produced or otherwise used by Portland Railway, Light & Power Company, which operated streetcars in Portland, Oregon, in the early 20th century.

Collection includes correspondence with A. H. Gould, 1906, regarding construction of a barn, with specifications and drawings, in Cleone (later Fairview), Oregon. Also included is a certificate of fire insurance for Martha Jane Pullen, 1898.