Mother Nature Network: Triadelphia, West Virginia Just outside of Wheeling on a busy stretch of Route 40, rows of RVs and campers line a gravel campground across from a distribution plant. Pick-up trucks parked beside most of the RVs boast identical front plates that proclaim their owners alliance to the Pipeliners Union. Each license plate tells a different story, with distant states such as Texas, Arkansas, California, Missouri and Colorado stamped across the plates. Less than a decade ago, the Dallas Pike Campground...