A while back I was in Sedona and took the Verde Canyon Railroad. This railroad was for mining but now is a popular tourist attraction. Here is a link to their web site. From the site:
The railroads of north central Arizona were all built to support Arizona’s richest copper mine located in Jerome, in the Mingus Mountains above Clarkdale. The Verde Canyon Railroad (formerly the Verde Valley Railroad, operated by the Santa Fe, Prescott & Phoenix Railroad,) was financed by Senator William A. Clark for $1.3 million dollars in 1911. Built miraculously in only one year, the 38-mile, standard gauge line from Clarkdale to Drake, AZ was constructed by 250 men using 200 mules, picks and shovels and lots of DuPont black powder explosives. Today, the same railroad would cost in excess of $40 million to build.
As always, I marvel at how fast these types of operations used to be built, in the days before government and lawyers strangled the life out of everything. I also doubt their “$40 million” figure, because you probably can’t build much of anything and get the permits to do so within our lifetime (the train line runs near a bald Eagle nest, which probably makes it impossible to construct anything).