|
| complete = (substructure)〔 | cost = 〔 | open = 12 January 1946 (eastern steel truss) 1 April 1960 (western vertical-lift truss portion) | inaugurated = | named_for = Helen Madere | toll = | traffic = 10,000 – 21,000 cars (2013) | preceded = | followed = | heritage = | collapsed = | closed = | replaces = 1919 composite bascule bridge〔 | map_type = USA California Northern | lat = 38.158713 | long = -121.683819 }} The Helen Madere Memorial Bridge, commonly called by its former name, the Rio Vista Bridge after its location, is a vertical-lift bridge which carries California State Route 12 across the Sacramento River at Rio Vista, California. The present bridge was completed in 1960 and is one of several moveable bridges spanning rivers in the Sacramento–San Joaquin River Delta. the bridge carries approximately 21,000 cars per day.〔 ==1919 bascule bridge== The original bridge spanning the Sacramento River was built in 1918 and opened in January 1919 at a cost of .〔 From west to east, the 1919 bridge consisted of a concrete tied arch, the Strauss double-leaf bascule, three concrete tied arches and timber A-frame trestle spans.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rio Vista Bridge」の詳細全文を読む スポンサード リンク
|