However, the C&O was a strong line. Despite the fact that in the early 1930s over 50% of American railroads went into receivership, it not only avoided bankruptcy, but took the occasion of cheap labor and materials to again completely rebuild itself. During the hard economic, C&O was boring new tunnels, adding double track, rebuilding bridges, upgrading the weight of its rail, and rebuilding its roadbed, all with money from its principal commodity of haulage: coal. Even during the Great Depression, coal was something that had to be used everywhere, and C&O was sitting astride some of the best bituminous seams in the country.