Dive summary:

• In 14 hours captured in a professional time-lapse video, crews from Omega Morgan slid the 1,100-foot-long Sellwood Bridge in Portland, Ore., to a new location about 10 yards away to keep the Willamette River crossing open as a detour route while a new bridge is being built.
• One of the necessary ingredients for moving the bridge that opened in 1925 – along with lots of planning, hydraulic jacks and heavy-lifting experience – was Dawn dishwashing liquid as a lubricant to slide the 3,400-ton bridge off its old supports and onto its new ones.
• The bridge is the busiest two-land span in Oregon, and the move of a truss span that long (captured on webcam video) might be a first – Multnomah County officials could not find a comparable job for comparison.

From the article:

As one witness put it to Oregon Live, "It's hard to describe exactly why, but this is all just incredibly exciting." ...