The Steel Bridge may look unremarkable — especially compared to Portland’s other river-spanning icons — but it’s an engineering rarity.
Why it matters: It’s the only active telescoping vertical lift bridge in the U.S…
The Steel Bridge may look unremarkable — especially compared to Portland’s other river-spanning icons — but it’s an engineering rarity.
Why it matters: It’s the only active telescoping vertical lift bridge in the U.S…