I77 over Catawba River

: UIG was the Lead Contractor for this emergency DB bridge replacement project on I 77 SB Bridge over Catawba River. The I-77 bridges throughout York and Chester counties, originally constructed in the 1970s, have experienced a significant increase in traffic count and loading since their construction, resulting in concrete decks that are deteriorating and requiring constant maintenance and emergency contracts by SCDOT to keep up with the repairs. The I-77 bridges over the Catawba River are the longest bridges affected at 1,075’ each which carry 105,000 vehicles per day in 9 lanes leading to a challenging maintenance routine that SCDOT found was no longer sustainable. In 2018, SCDOT advertised a project to replace the bridge decks on both the I-77 northbound and southbound bridges over the Catawba River. United Infrastructure Group started the 416 hour project deadline of the I-77/Catawba River Emergency Deck Replacement Project to remove and replace 50,000 square feet of the existing concrete deck in the southbound lanes in just 17 days. The dedicated team assembled had 300 crew members and over 50 pieces of equipment. The work included hydro and conventional demolishing of 50,000 square feet of concrete deck followed immediately with installation of 50,000 square feet of metal forms, 400,000 pounds of rebar/accessories, and 1,450 cubic yards of concrete, plus expansion joints, and barrier rails. The project was completed in 360 hours.