About 125 workers are expected to be hired for the 1st phase of the massive plant south of Pasco, near Wallula Gap.

Rockwool, Danish insulation manufacture with a U.S. base in West Virginia, is seeking contractors to help build s $175 million plant at Wallula Gap ... for review under Washington’s ...

Excavators prepare a 250-acre site at Wallula Gap Business Park for a $175 million insulation manufacturing plant. Rockwool will crush and melt rock and spin it into building insulation.