Because moving traded goods great distances by floating them
on the water is just about the easiest and cheapest way to
deliver them from one place to another place.
There was a 20% chance that you would be employed as a prostitute if you were a woman in the "Old American West”.
In the Old American West, the mining population was composed of 95% young and male people so a high demand during that time was female companionship. Saloons also doubled as a brothel during this time.
I believe that the answer you are looking for is Mixed.
I believe, I'm not 100% sure.
a rail roads this is why they built the railrod in the 1850 that was almost through the whole reaches of the us