How do you get your cables from one side of the bridge to another when your suspension bridge will be 560 meters above the river? The Siduhe Grand Bridge in China is nearing completion after four years of construction.
previous solutions have included: attaching the cable to a kite and flying it over (e.g. niagara falls suspension bridge), carrying one end by helicopter (e.g. akashi kaikyo bridge) and floating one end on a boat (e.g. brooklyn bridge). the brains behind the siduhe bridge decided to ignore all those options and break another record instead. they attached the 3200ft cables to rockets and accurately fired them over the valley, becoming the first people to do so.
http://deputy-dog.com/2008/11/rockets-help-build-bridge-higher-than.html
However, during an earthquake, I would probably just stay off the bridge. =D