S.C. Ports Authority was awarded a nearly $20 million federal grant to assist with building vital infrastructure at Wando Welch Terminal in support of the Charleston Harbor Deepening Project.The U.S. Department of Transportation awarded the Port Infrastructure Development Grant for S.C. Ports’ Wando Welch Terminal Wharf Toe Wall and Berth Deepening Project. The funds will go toward building a toe wall and deepening three berths at the Wando terminal…