An ounce is a unit of weight which is approximately equal to 28  grams. One gallon is equal to 128 ounces so there are 640 ounces in  5 gallons of water.
The first U.S. railroad to use a steam locomotive in revenue service was the South Carolina Railroad. It opened on Christmas Day 1830 using the Best Friend of Charleston steam locomotive on six miles of track in Charleston, South Carolina.
The First Transcontinental Railroad (known originally as the Pacific Railroad and later as the Overland Route) was a 1,907-mile (3,069 km) contiguous railroad line constructed between 1863 and 1869 that connected the existing eastern U.S. rail network at Council Bluffs, Iowa with the Pacific coast at San Francisco Bay.