U.S. 17 to close five nights to place four beams for Mount P. overpass

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. 17 overpass connecting Interstate 526 and Hungryneck Boulevard. (Nani Rice/postandcourier.com)

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. 17 overpass connecting Interstate 526 and Hungryneck Boulevard.

On Friday, the town revised the overpass construction schedule after it received new information that the Sunday night closure of U.S. 17 was cancelled but the highway would still shutdown Saturday overnight for the work as originally announced Thursday. 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 p.m. Saturday to 9 a.m. Sunday. On Tuesday through Thursday of next week, the highway will close from 11 p.m. until 5 a.m. the following morning. On Friday next week, the closure will happen from 10:30 p.m. to 7:30 a.m. Saturday, 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.

And more overnight closings of the highway at that location will be required when concrete is poured to form the bridge deck, he said.

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