Steam tug boat "Portland" on the Willamette River in 1981. Built in 1947 the tug was the last steam powered stern wheel tug boat built in the United States and was the last in service when retired in 1981. in 1981. Photograph by Alden Raney. Other subject classes: Tug Boat-Steam.

Fire fighting train for the miniature railway that operated at the 1959 Oregon Centennial Exposition held at North Portland in 1959. Photograph by Alden Raney. Other subject classes: Train-Miniature.

Portland Zoo "Zooliner" train at the 1959 Oregon Centennial Exposition held at North Portland. in 1959. Photograph by Alden Raney. Other subject classes: Train-Miniature.

Portland Zoo "Zooliner" train at the 1959 Oregon Centennial Exposition held at North Portland. in 1959. Photograph by Alden Raney. Other subject classes: Train-Miniature.

VIP speeder-trolley at the 1959 Oregon Centennial Exposition held at North Portland in 1959. Photograph by Alden Raney. Other subject classes: Train-Miniature.

Portland Zoo Railway 4-4-0 steam locomotive on loan to the 1959 Oregon Centennial Exposition held at North Portland in 1959. Photograph by Alden Raney. Other subject classes: Train-Miniature.

Portland Zoo Railway 4-4-0 steam locomotive on loan to the 1959 Oregon Centennial Exposition held at North Portland. Repairs being done on front truck in 1959. Photograph by Alden Raney. Other subject classes: Train-Miniature.

Portland Zoo Railway 4-4-0 steam locomotive on loan to the 1959 Oregon Centennial Exposition held at North Portland in 1959. Photograph by Alden Raney. Other subject classes: Train-Miniature.

Portland Zoo Railway 4-4-0 steam locomotive on loan to the 1959 Oregon Centennial Exposition held at North Portland in 1959. Photograph by Alden Raney. Other subject classes: Train-Miniature.

Portland Zoo Railway 4-4-0 steam locomotive on loan to the 1959 Oregon Centennial Exposition held at North Portland in 1959. Photograph by Alden Raney. Other subject classes: Train-Miniature.