The smell coming from the site now is not the stench of burning oil soaked logs, but diesel fumes from pile drivers used to pound huge pylons into the ground. 
 
SOUND OF PILE DRIVER
 
Rob Hughes, the state official on site monitoring the work, says the pylons will be used to support the new track:
 
 
They’re huge, heavy concrete posts.  Some of them can be as much as 60 feet long and they’re driving them as far down as they can to use that as a base to attach the replacement trestle.
 
Union Pacific is working round the clock to rebuild the two track, 14 hundred foot length of trestle.  Company officials say one track will be open within a little more than two weeks.  Right now, Union Pacific Freight trains and Amtrak’s Commuter service between Sacramento, Roseville and Auburn are being rerouted around the area.
Sacramento arson investigators are still looking into the cause of the fire, which erupted on the tracks last Thursday evening.