Updated: 12:13 PM EDT April 13, 2021 SOUTH CAROLINA, USA — Drivers who frequently use I-77 between Charlotte and Rock Hill, get ready to pack your patience. Heavy delays are expected next month as crews make major renovations to the Catawba River Bridge. “We are going to replace the southbound bridge deck on I-77 over the Catawba River," SCDOT Deputy Secretary for Engineering Leland Colvin said. The Catawba River Bridge was built in 1973. It was widened in 2000 but SCDOT officials say short-term repairs just won't cut it anymore, because 120,000 cars travel on it daily, in both directions. “We basically just need to go out there and quickly replace that riding surface," Colvin said.