Two construction workers were injured Thursday when a PennDOT truck struck them on a West Hempfield Township bridge, officials said.

The workers, whose names weren't released to the media Thursday, were replacing a bridge over Strickler Run at Route 462 when they were struck about 10 a.m., officials said.

A wing plow on the PennDOT truck clipped the workers, officials said, knocking one man down an embankment and forcing the other to cling to a guardrail.

The workers were taken to Lancaster General Hospital, treated and released, PennDOT spokesman Greg Penny said Thursday evening.

They returned to the work site and continued work on the bridge later in the day, Penny said.

The driver of the PennDOT truck continued to drive after crossing the bridge, according to officials.

"It sounds like he went on because he wasn't aware" he hit them, Penny said.

PennDOT is investigating the incident and was trying to identify the truck driver Thursday. Penny said each driver has a designated route.

The truck had to be one of PennDOT's, Penny said, because witnesses said they saw the department logo and because "no one else has a wing plow."

Each lane of travel was narrowed to about 10 feet while workers replaced the bridge, Penny said.

The bridge replacement is a PennDOT project that was awarded to Kinsley Construction Inc. of York, which was paid $858,313 for the job, Penny said. The workers are with Green Acres Contracting Co. of Scottdale, Westmoreland County, which was subcontracted by Kinsley to work on bridge.

The workers were outside a bridge guardrail when they were struck, officials said. The plow apparently hung over the guardrail as the truck passed over the bridge.

West Hempfield Township police were at the scene of the incident.

Police officials contacted Thursday didn't immediately return calls.

Construction on the bridge began last fall and is to be completed by spring, Penny said.

The bridge is heavily traveled, Penny said, carrying an average of 16,752 vehicles a day across Strickler Run.

E-mail: bhambright@lnpnews.com