Moore Road Stone Arch Bridge is a historic stone arch bridge located at Cornwallville in Greene County, New York.
 It was constructed in 1887, and is a single-span, dry laid limestone structure with a round arch.
 Jeremiah Cunningham was the builder.
A through arch bridge, also known as a half-through arch bridge or a through-type arch bridge, is a bridge that is made from materials such as steel or reinforced concrete, in which the base of an arch structure is below the deck but the top rises above it.
 Thus, the deck is within the arch, and cables or beams that are in tension suspend the central part of the deck from the arch.
Bridge Day is an annual one-day festival in Fayetteville, Fayette County, West Virginia, United States The event is coordinated by the New River Gorge Bridge Day Commission, and is sponsored by numerous companies of both local and international significance.
 The event, held on the third Saturday every October, commemorates the 1977 completion of the New River Gorge Bridge.
 On this day, all four lanes of the bridge are closed to automobiles and opened to pedestrians.
 Estimates have 100,000 people attending the overall event.
The Hayden Arch Bridge is a concrete arch bridge on old US 14/US 16 near Cody, Wyoming.
 It is the only example of its kind in Wyoming.
 Built in 1924-25, the single-span bridge spans 115 ft with two smaller approach arches between rock canyon walls.
 The bridge carries the Cody-Yellowstone Highway across the Shoshone River with a shallow open-spandrel central arch and nominally-arched approach spans.
 The bridge is named after C.E. Hayden, an engineer with the Wyoming State Highway Department, who designed the bridge and supervised its construction.
 It was built by H.S. Crocker of Denver, Colorado.
The Evansville-Dutch Mills Road Bridge is a historic bridge in rural western Washington County, Arkansas.
 It is a single-span concrete filled-spandrel arch bridge, which carries Dutch Mills Road (County Road 464) over Whitaker Branch South south of the village of Dutch Mills.
 The bridge was built in 1936 by the Luten Bridge Company, and was one of its last commissions in the county.
 The arch spans 28 ft and the bridge has a total structure length of 30 ft .
 The bridge was built with a unique Luten Company design that used rings to strengthen the connection between the piers and spandrel walls, enabling a reduced amount of material while maintaining the strength of the bridge.
The Lupu Bridge () is a through arch bridge over the Huangpu River in Shanghai, China, connecting the city's Huangpu and Pudong districts.
 It is the world's second longest steel arch bridge, after the Chaotianmen Bridge in Chongqing.
 The bridge has a total length including approach spans of 3900 m and opened on June 28, 2003.
 The main bridge structure is 750m long including the two side spans of 100m each, and the main span of 550 m over the Huangpu River is 32 m longer than the previous record holder for the longest arch bridge, the New River Gorge Bridge in Fayetteville, West Virginia.
 It cost 2.5 billion yuan (US$302 million), including US$78.04 for the main steel structure alone.
 It is located adjacent to the former Expo 2010 site and served as the centrepiece of the world exposition in Shanghai.
The Old Stone Arch Bridge is a single-span stone arch bridge which crosses Jack's Creek in Derry Township, Mifflin County, Pennsylvania.
 Philip Diehl built the bridge in 1813 as part of the Harrisburg to Pittsburgh Turnpike; it is the oldest bridge of its type in central Pennsylvania.
 The turnpike had been authorized in 1807, and the section from Harrisburg to Lewistown, on which the bridge lies, was completed in 1818.
 Lithographers Currier and Ives made prints of the bridge in 1850.
The Stone Arch Bridge is a bridge in Danville, Illinois, which carries U.S. Route 136 (US 136; East Main Street) across Stony Creek.
 The segmental arch bridge is 92 ft long and built with sandstone.
 The bridge was built in the 1890s to facilitate Danville's expansion during an industrial boom.
 As various geographic and political limitations prevented the city from expanding in any directions but east and southeast, the city grew over Stony Creek, necessitating a new bridge.
 Mayor John Beard commissioned the bridge; during the 1890s, Beard and political rival John Cannon clashed over many issues, and Beard most likely built the bridge to demonstrate his political effectiveness.
 The bridge is the only segmented arch bridge remaining in east-central Illinois and is one of five stone arch bridges in the region.
Bridge in Fishing Creek Township was a historic concrete arch bridge located in Fishing Creek Township in Columbia County, Pennsylvania.
 It was a 40 ft open spandrel, single-span arch bridge constructed in 1915.
 The bridge featured a pierced molded concrete parapet with light, star-shaped designs.
 It crossed Little Pine Creek, but has been demolished.
The New River Gorge Bridge is a steel arch bridge 3030 ft long over the New River Gorge near Fayetteville, West Virginia, in the Appalachian Mountains of the eastern United States.
 With an arch 1700 ft long, the New River Gorge Bridge was for many years the world's longest single-span arch bridge; it is now the fourth longest.
 Part of U.S. Route 19, its construction marked the completion of Corridor L of the Appalachian Development Highway System.
 The bridge is crossed by an average of 16,200 motor vehicles per day.

Question: Bridge Day commemorates the 1977 completion of which single-span arch bridge?
Answer: New River Gorge Bridge