Mack's Winnsboro, S.C., plant is being closed down on Friday, according to the Allentown Morning Call,resulting in the layoff of about 670 workers.

Volvo, which is Mack's parent company, had two U.S. plants for making highway tractors -- the Mack plant in Winnsboro and an expanded Volvo Trucks plant in Dublin, Va. With a recent sharp drop in U.S. heavy-duty truck sales, neither was operating near capacity.
The Winnsboro plant, with a capacity of 160 trucks per day, has recently been making about 57 per day. The Dublin plant, with a capacity of 208 trucks per day, has been making about 45 a day in recent times.
Together, Mack and Volvo can assemble trucks at the larger Volvo Trucks factory with plenty of room to spare.
Winnsboro became expendable, and Volvo announced its decision to close the plant last year.
Production of Mack's CH and CX models, the long-haul trucks made in South Carolina, will be transferred to the Volvo Trucks plant later this year or early next.
About 670 people will be let go soon after Mack ends production on Friday, the Morning Call reported. The assembly line will be rebuilt in Virginia, where Mack engineers have already been testing it.
Not affected by the changes is the Mack factory that makes trash and construction trucks in Macungie. It employs 829 workers. Including its headquarters and test center in Allentown, Mack employs a total of about 2,100 people in the Lehigh Valley.