MOUNT PLEASANT — More overnight closures for the busiest road in town will be needed to lift four massive beams into place to create the new U.S. Highway 17 overpass connecting Interstate 526 and Hungryneck Boulevard.
On Friday, Mount Pleasant revised the overpass construction schedule after it received new information that the Sunday night closure of U.S. 17 was canceled but the highway would still shut down tonight for the work as originally announced. In addition, the town said it learned Friday that more overnight closures of U.S. 17 would happen Tuesday through Friday of next week.
U.S. 17 will close for the overpass construction from 10:30 tonight to 9 a.m. Sunday.
On Tuesday through Thursday, the highway will close from 11 p.m. until 5 a.m. the following day. On Friday, the closure will happen from 10:30 p.m. to 7:30 a.m. May 12, the town said.
The highway will close at those times so two giant red cranes can maneuver each beam into place. One beam weighs more than 50 tons, is 250-feet long and seven feet tall.
When the work is happening, a marked loop will detour U.S. 17 traffic around the construction via Mathis Ferry or Rifle Range roads.
Even with the extra U.S. 17 late-night closings announced Friday, the work to build the overpass foundation will only be slightly more than half completed. In all, seven beams weighing over 100,000 pounds each have to be hoisted by crane and put in place. When the remaining three beams will be installed has not been decided, said Ed Barbee, the town’s road construction information officer.
In addition, more overnight closings of the highway at that location will be required when concrete is poured to form the bridge deck, he said.
The $26 million project is scheduled for completion in January.
It was made possible by funding from the State Infrastructure Bank and is part of a larger project to widen more than seven miles of U.S. 17 from the Arthur Ravenel Jr. Bridge to Darrell Creek Trail.