PotlatchDeltic Corp. announced Monday that it is investing $131 million to expand and modernize its Waldo sawmill located in Columbia County, Arkansas.  The project will increase the mill's annual capacity from 190 million board feet of dimensional lumber to around 275 million board feet.  The investment will also reduce the mill's operating costs significantly.The Waldo investment includes upgrades to the log yard and planer, a new saw line, and a new continuous dry kiln.  The completion of the project is expected by the end of 2024. During the project, the existing ...