The Str. PORTLAND was built at Portland, Oregon, in 1947 by Northwest Marine Iron Works for the Port of Portland as a sternwheel towboat to replace the previous Steamer Portland which was built in 1919. The hull was steel constructed and it supported wood upper decks; cabin deck, texas deck and wheelhouse. She was decommissioned in 1981. Operated by two independent river tug boat companies, Western Transportation and Shaver Transportation, she served her entire working life as a Portland Harbor tug. In 1989 she was adopted by the Oregon Maritime Museum as it’s premier exhibit and still serves the Portland waterfront in that capacity. She is fully operational and periodically steams-up. Information from ; www.Steamboats.org
Better viewed larger.

I took this picture of the steam-powered sternwheeler “PORTLAND” Maritime Museum on the Portland, Oregon Waterfront from the cruise ship Willamette Star on 9/17/2009 with a Canon SX10 IS at 1/1000, F 2.80, ISO 80, Focal length 5.00mm