Stone arch bridge address8/25/2023 ![]() On the vehicle side of the roadway, a concrete curb was added to reinforce and protect the stone parapet. The renovation added a pedestrian/bike lane, providing continuity for the MacArthur Boulevard Bike Trail. In the summer of 2001, the narrow roadway underwent extensive renovations, partially due to vehicles bumping and damaging the low, unreinforced stone parapet, particularly in the middle of the span where the bridge further narrows. ![]() "Between 18, a $46,000 appropriation allowed the road to have macadam topping for about a mile." The bridge also began to be used for the transit of equipment to repair the conduit itself. However, soon after its completion, farmers began to use the bridge to bring produce to market. Originally, the bridge was not intended to support traffic and so the conduit was only covered with soft clay. Īlthough Washington's population of approximately 58,000 was estimated to need 5,220,000 gallons per day, the conduit was designed for a daily capacity of 76,500,000 gallons. Visually, the similarities between the Union Arch Bridge and the Grosvenor Bridge are remarkable. Previously, that honour had gone to the Grosvenor Bridge which crosses the River Dee in Chester, England and which was opened by the thirteen-year-old Princess Victoria (five years before becoming Queen) in October 1832. It retained that distinction until the opening of the 277-foot (84 m) span of the Pont Adolphe Bridge in Luxembourg in 1903. When completed in 1864, the main span was the longest single-span masonry arch in the world. The bridge has an internal spandrel wall structure that contains nine additional smaller arches, which are concealed from view by exterior stone sidewalls. The main arch span is 220 ft (67 m) long and rises 57 feet 3 inches (17.45 m). The bridge, with an overall length of 450 ft (140 m) and width of 20 ft (6.1 m), is constructed of Massachusetts granite and red sandstone quarried at the nearby Seneca Quarry, and rises 101 ft (31 m) above Cabin John Creek. The Union Arch Bridge was designated as a National Historic Civil Engineering Landmark by the American Society of Civil Engineers in 1972 and was listed in the National Register of Historic Places in 1973. The bridge was designed by Alfred Landon Rives, and built by the United States Army Corps of Engineers under the direction of Lieutenant Montgomery C. The bridge construction began in 1857 and was completed in 1864. It was designed as part of the Washington Aqueduct. The Union Arch Bridge, also called the "Cabin John Bridge", is a historic masonry structure in Cabin John, Maryland.
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