Collection consists of 6 plans on 4 sheets of the sternwheel steamer Hassalo. The drawings include a side view; a plan of the freight deck; a lines plan; and a cross section. It is unknown whether the plans are original or are later reproductions.

Plans for a sidewheel steamer, Oneonta. The plans may be a depiction of the steamer Oneonta built in 1863 and operated by the Oregon Steam Navigation Company, but features in the plans differ from photographs of that steamboat. It is unknown whether the plans are originals or are later reproductions. The drawings consist of a top view, a side view, and a plan of the pilot house and rooms.

Plans, sections, details and elevations on 9 sheets of the steamship Portland II, a 186-foot steel towboat for Northwest Marine Iron Works, 1946; a conceptual mooring plan by B. Bach and L. Fritzie, October 1981; and a color print of a painting of the steamship Portland II passing under the Fremont Bridge on the Willamette River by James M. Longstreth, 1977.

Collection consists of plans of the steamer R. R. Thompson, which was originally designed by John Gates. It is unknown whether the plans are original or are later reproductions. Drawings include top and side views; deck plans; and plans of the engine, boiler, and piston head and rings.