Just three years after Colt's first factory opened, the Sharps Rifle Manufacturing Company set up shop in 1852 at a nearby site along the now-buried Park River, located in the present-day neighborhood of Frog Hollow. Their factory heralded the beginning of the area's transformation from marshy farmland into a major industrial zone. The road leading from town to the factory was called Rifle Lane; the name was later changed to College Street and then Capitol Avenue. A century earlier, mills had located along the Park River because of the water power, but by the 1850s water power was approaching obsolescence. Sharps located there specifically to take advantage of the railroad line that had been constructed alongside the river in 1838.