Although recent reports hint that Caterpillar Inc.'s chief executive is contemplating moving the manufacturer's headquarters outside Illinois, Cat Chairman and CEO Doug Oberhelman says that�s not true. Photo: Tudor Van Hampton for ENR Peoria, Ill., became the official home of Caterpillar after Calif.-based Holt Tractor Co. and C.L. Best Tractor Co. merged in 1925. "I want to stay here," says Oberhelman in a March 21 letter to Illinois Gov. Pat Quinn (D), in which the Woodstock, Ill., native admits being "wined and dined" by other state governors trying to lure Cat to move its longtime headquarters in Peoria, Ill. "You've
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.