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.

Papers of William H. Truenbach (1874-1969) relating to his education and brief architectural career, including examinations and mechanical drawings done through International Correspondence Schools, and plans for several buildings. Truenbach lived in Salem, Oregon, while taking courses, before moving to Portland, Oregon, where he worked as a draftsman and then as a machinist.