The Stone Arch Bridge is a former railroad bridge crossing the Mississippi River at Saint Anthony Falls in downtown Minneapolis, Minnesota. It is the only arched bridge made of stone on the entire Mississippi River. It is the second oldest bridge on the river next to Eads Bridge. The bridge was built to connect the railway system to the new Union Depot, which at that time was planned to be built between Hennepin Avenue and Nicollet Avenue. The bridge was completed in 1883, costing $650,000 at the time ($ today). 117 Portland Avenue is the general address of the historic complex. Located between the 3rd Avenue Bridge and the I-35W Saint Anthony Falls Bridge, the Stone Arch Bridge was built in 1883 by railroad tycoon James J. Hill for his Great Northern Railway, and accessed the former passenger station located about a mile to the west, on the west bank of the river. For a time, the bridge was dubbed "Hill's Folly" until the value of Hill's new bridge as a passenger rail link became evident. The structure is now used as a pedestrian and bicycle bridge. It was added to the National Register of Historic Places in 1971 as a part of the Saint Anthony Falls Historic District, (District #71000438). The bridge was designated as a National Historic Civil Engineering Landmark in 1974. History In 1880, Minneapolis was a bustling city with major commerce mostly located on the west bank of the Mississippi River, while smaller, up-and-coming businesses were on the east. With the merging of the Village of St. Anthony on the east side, Minneapolis continuously grew in population, and the Hennepin Avenue suspension bridge served as the sole thoroughfare for commuters and pedestrians. At that time, the Hennepin Avenue bridge was overused and in desperate need of upkeep. The city's network of railroads, which was crucial for urbanization, was also located on the east side of the river. With the rapid increase in commercialization, Minneapolis businessmen sought a plan to accommodate the heavy flow of traffic, and immediately considered the railroad mogul James J. Hill for the task. The idea was to build a railroad depot, similar to the St. Paul Union Depot, along the intersections of Hennepin Avenue and Nicollet Avenue in downtown Minneapolis, which would also connect to the Manitoba Road tracks, eventually developing into the Great Northern Railway. The initial planning was conducted during