The CHP Tuesday morning closed a lane on a major Napa area highway due to damage stemming from Sunday’s earthquake, possibly made worse by Tuesday’s early series of aftershocks.

There’s a small bump in the fast lane on Highway 29 at a Napa River bridge that apparently has gotten bigger, said Napa CHP Officer Lisa Paulson.

Traffic was being slowed to 25 mph and funneled to one lane. CHP officials were warning drivers of delays on the major connector route between east Sonoma County and southern Napa County.

“Caltrans is enroute to inspect,” Paulson said. “We’ve been out there looking at it. We don’t feel it’s unsafe enough to need to close (the bridge.) We’ve closed the number one lane. “

“There was something there initially. It looks like it’s perhaps gotten bigger, maybe after some of the aftershocks,” Paulson said.

The CHP issued an advisory at 9:25 a.m. that the fast lane is closed for emergency repairs and they couldn’t give an estimated time of when the lane would be open.

The problem is at long crossing over the river known as the George F. Butler bridge. The alert warned drivers to use Highway 121 to nearby Highway 221 and to expect delays.

— By Randi Rossmann, Press Democrat Staff Writer