User:Amiaheroyet/sandboxKienBridge

Kien Bridge Cầu Kiền is a road bridge spanning the Cấm River in Haiphong, Vietnam.

Description
Kien Bridge is a Cable-stayed bridge. The length of of the bridge is 1186 m, with a its span 200 m long. It is a key link on Vietnam's National Route 10 by spanning the Cấm River in Haiphong, helping travelers more easily navigate through the Red River Delta.

Construction
Before the opening of the Kien Bridge, going between the river banks required travel by either boat or ferry. Construction began in 2001 as a Vietnam-Japan joint venture. The building process required a diverse range of methods to address the complicated geology of the riverbed in the area. This included the installation of a nearly 100 m crane tower and using the cantilever method to have crane to mount 110 box girder blocks weighing 14,300 tons. As a cable stayed bridge, construction required the tensioning of 375 tons of prestressed cable to make the 36 pairs. Overall, it was estimated that the building of the Kien bridge required 5,000m³ of reinforced concrete and 6,910 tons of steel.

Operation
The bridge was inaugurated on September 28, 2003. The bridge connected Haiphong City of Quang Ninh Province with the Northeast and North Central regions of Vietnam, creating a road between the two communes An Hong and Kien Bai Haiphong. It quickly became a popular route as industrial development in the region led to a regular flow of tractor trailers using the bridge. Its lack of maintenance gradually led to the degradation of the road's surface. In 2014, the news outlet Thanh Nien described the potholes as "A Matrix of Elephant Nests" and reported serious, sometimes fatal, traffic accidents occurring due to road's deterioration. There were further reports of warped railings and damaged expansion joints. In 2021, officials approved extensive repairs of the roads of National Highway 10, including the road between Da Bac Bridge and Kien Bridge.