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The Knik Arm Bridge is a proposed 1.74-mile bridge across Cook Inlet's Knik Arm to link the two fastest growing parts of Alaska – Anchorage and the Matanuska-Susitna Borough. The project consists of a 1.74-mile-long bridge with 18 miles of connector roads, including on and off ramps, and a $50 million cut and cover tunnel under Government Hill.〔http://www.knikarmbridge.com/Tech_Reports/NewReports/Government%20Hill%20Roadway%20Structure%20Alts.pdf〕 Current cost estimates are between $700 and $800 million.〔 Proponents say the crossing would provide access to much-needed residential, commercial and industrial land; create jobs; reduce the cost of transportation to Interior Alaska and the North Slope; lessen carbon emissions and provide an alternative transportation route out of Anchorage. Opponents say the crossing would create unnecessary urban sprawl in the Anchorage area, would be more expensive and less used than projected, would divert limited transportation funding away from more critical projects, would disrupt the Government Hill neighborhood, and negatively impact the endangered Cook Inlet beluga whales. ==Concept== The idea of a bridge or causeway across Knik Arm was first envisioned in 1923 by Alaska Railroad engineers looking for a more efficient route to Alaska's interior. In 1955 a group of Anchorage businessmen studied it again.〔 At that time, the cost estimate was $25 million ($194 million in 2008 dollars). The development of Seward's Success in the late-1960s called for the development of both an aerial tramway and monorail to span the Knik Arm. The Knik Arm Bridge And Toll Authority or KABATA, created by the Alaska Legislature in 2003 to develop a method of construction, financing, design, operation and maintenance of the bridge. Since that time KABATA has completed the final EIS, obtained a “build” Record of Decision from FHWA and moved into preconstruction activities including submitting permit application and purchasing right-of-way needed for a cut and cover tunnel under Government Hill. 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「Knik Arm Bridge」の詳細全文を読む スポンサード リンク
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