Interstate Bridge, Columbia River, Oregon & Washington : 無料・フリー素材/写真
Interstate Bridge, Columbia River, Oregon & Washington / Thad Roan - Bridgepix
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Interstate Bridge carrying Interstate I-5 over the Columbia River between Portland, Oregon and Vancouver, Washington. The Interstate Bridge is a pair of identical steel through Truss Bridges with a vertical lift. The original bridge was completed in 1917, and its twin opened in 1958. The Interstate Bridge is a pair of nearly identical steel through truss bridges with a vertical lift that carries Interstate 5 traffic over the Columbia River between Vancouver, Washington and Portland, Oregon.The bridge was built to replace an overcrowded ferry system operated by Pacific Railway, Light & Power Co. Construction on the bridge began in March 1915, following the sale of bonds. The first bridge was opened on February 14, 1917 at a cost of $1.75 million, which was shared between Clark County and Multnomah County. It was originally a toll bridge costing $.05 per person. In 1958 a $14.5 million upgrade created a southbound span and doubled the capacity of the bridge. The new bridge was built with a "humpback" that provides 72 ft of vertical clearance and minimizes bridge openings. At the time the new bridge was opened, the old one closed to give it the matching humpback. When both bridges were opened in 1960, tolls were reinstated at $.20 for cars, $.40 for light trucks, and $.60 for heavy trucks and buses, before being permanently removed in 1966.A $3 million upgrade to the lift cables, expansion joints, and a deck repaving was completed in 1990. The diesel generator used to power the lift was replaced in 1995 at a cost of $150,000. In 1999 the bridge was repainted at a cost of $17 million. A $10.8 million electrical upgrade was completed in mid-May of 2005. The bridge is 3,538 ft long with a main span of 531 ft. The vertical lift provides 176 ft of clearance when opened. The lift takes 10 minutes to open and does so between 10 and 20 times per month. In 2001 the 6 lanes of the bridges carried 120,000 vehicles including 10,000 trucks, operating at capacity for four hours every day. (Wikipedia) |
| 撮影日 | 2002-08-22 12:00:07 |
| 撮影者 | Thad Roan - Bridgepix , USA |
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| 撮影地 | Vancouver, Washington, United States 地図 |