Sharon Wood Wortman, author of The Portland Bridge Book spoke at Portland State University

You can see her talk at: Center for Transportation Studies Seminars

She gives an interesting talk with some fun stories.
And of course, the usual facts and reviews.

• 600,000 bridges in US. 5,700 bridges in Oregon
• Lift types: Vertical – Bascule – Swing Span
• Bridge types: Suspension – Arch – Beam – Truss – Canteliver
• Only 160 truss bridges left in Oregon
  (in my opionion, the most interesting ones in Oregon)
• Only suspension bridge in Willamette Valley is the St. Johns.

She says there is a Bridge Museum at ODOT?
We will have to check that out.

You can see her site at Bridge Stories.