What is the bridge near Clark Island made of?
Sydney Harbour Bridge The Sydney Harbour Bridge is a steel through arch bridge across Sydney Harbour that carries rail, vehicular, bicycle, and pedestrian traffic between the Sydney central business district (CBD) and the North Shore. The dramatic view of the bridge, the harbour, and the nearby Sydney Opera House is an iconic image of Sydney, and Australia. The bridge is nicknamed "The Coathanger" because of its arch-based design.
Lower Blackburn Grade Bridge The Lower Blackburn Grade Bridge, also named the Van Duzen River Bridge or Mile 18 Bridge, is a 258 ft reinforced concrete through arch with a main span approximately 150 ft over the Van Duzen River about 4 mi west of Bridgeville, California, United States. It was active from its construction in 1925 to 1985 when replaced.