Railroad 1869 Along the Historic Union Pacific in Utah to Promontory

As the Union Pacific entered the Utah canyons progress slowed to a crawl. The builders were forced to use large embankments, trestles and tunnels. All of them slower, difficult to build and expensive. Then as the competing railroads drew closer to their meeting point at Promontory Summit the competition became intense. "Build it fast, we'll fix it later" was the by-word.