SLIPPERY ROCK TWP, Lawrence County — A Butler County trucker was hurt Tuesday morning when his dump truck crashed and spilled a load of stone onto Route 422, state police said.

Michael J. Barbish Jr., 81, of Harmony was flown by medical helicopter to a Pittsburgh hospital with moderate injuries. His condition was not known this morning.

Police said Barbish was northbound on Mount Hope Furnace Road in Slippery Rock Township about 9 a.m. when he lost control of his 1989 Ford triaxle truck.

The truck went off the road, hit an embankment and rolled into its passenger side, spilling its load onto Route 422 at the Mount Hope Furnace Road intersection.

Slippery Rock Township volunteer firefighters had to rescue Barbish from the truck. He was taken to UPMC Presbyterian. Police said he was not wearing a seat belt.

The wreck temporarily closed a portion of Route 422 to allow crews to clear the debris and stone.

The investigation continues.