The bridge was designed by Richard Osborne in 1856. He submitted a model to the company made of pieces of soap before construction and workers were paid partially in whiskey, leading to the unusual nickname.
The main arch of the bridge spans 40 feet (12 m), with two smaller arches spanning the sidewalks on either side. The courses of the arch are constructed from local brownstone in elliptical curves which follow the angle at which the railroad tracks cross the street. Because of this design, there is no keystone in the arch.