The estimated price tag to earthquake-proof the tower: more than $230 million. Some upgrades were expected, but the cost and ...

Nine months after the sale closed, some of the supervisors say they have sticker shock. The sore point: a looming ...

Multnomah County is $10 million closer to funding downtown Portland’s only earthquake-proof bridge over the Willamette River.

Some of the towers were taller than the girls who built them. The structures were tested for strength by placing a 5-pound weight on top and leaving it there for 15 seconds.

The rigidity of its marble structure combined with soft soil below helps the Leaning Tower of Pisa withstand seismic waves, according to new research funded by Opera della Primaziale Pisana.