Antebellum landmarks may be sacred in Charleston, S.C., but the recently opened Cooper River Bridge (officially known as the Arthur P. Ravenel Bridge) has changed at least part of the city's skyline in a big way. As North America's longest cable-stayed bridge, it was designed to withstand an earthquake more powerful than the 1886 Charleston earthquake, estimated at 7.3 on the Richter scale. Construction of the bridge required 330,000 cubic yards of concrete, enough to fill an entire NFL stadium. The Cooper River Bridge was built through the cooperative efforts of a number of different companies. The general contractor was Palmetto Bridge Constructors (PBC). The O.L. Thompson Construction Company of Charleston handled the road construction. Wando Concrete Company, a subsidiary of O.L. Thompson, produced the concrete.