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Nada Tunnel is a historic long tunnel along Kentucky Route 77 in Powell County, Kentucky, in the United States.〔(【引用サイトリンク】 title=Nada Tunnel, Kentucky - Map and Latitude Longitude GPS Coordinates )〕〔(【引用サイトリンク】 title=Nada Tunnel )〕 Formerly a railway tunnel, the presently paved tunnel has often been described as the "Gateway to Red River Gorge" for the shortcut it provides motorists to the Red River Gorge canyons of the Daniel Boone National Forest. Built for the Dana Lumber Company between 1910 and 1911, Nada Tunnel (pronounced nay-duh by locals) was named from Nada, Kentucky, then a logging town about past the tunnel's entrance. Solid limestone was blasted with dynamite and dug out with steam machinery and hand tools, with two teams working from each side of the ridge.〔(【引用サイトリンク】 title=Nada Tunnel (KY) )〕 The tunnel's original dimensions were , but when the first train load of logs became stuck and had to be blasted free, the tunnel's height was increased to . Narrow gauge steam locomotives of the Big Woods, Red River & Lombard Railroad regularly hauled timber extracted from the vast forests of the Red River Valley through the tunnel, to a sawmill away in Clay City.〔(【引用サイトリンク】 title=Big Woods, Red River & Lombard Railroad )〕〔(【引用サイトリンク】 title=Nada Tunnel (KY 77) )〕 Once the forests had been cleared, the timber companies pulled out of the area. The railroad tracks were removed and a dirt road was laid in the unlit tunnel in order to accommodate horse and pedestrian traffic. Nada Tunnel has since been paved to carry a single lane of road traffic. Nada Tunnel itself,〔(【引用サイトリンク】 title=Daniel Boone National Forest - Special Places )〕 or rather the prehistoric Native American rock art sites Nada Tunnel 1 Petroglyphs and Nada Tunnel 2 contribute to the National Register of Historic Places listings in Powell County, Kentucky.〔(【引用サイトリンク】 title=National Register of Historical Places - Kentucky (KY), Powell County )〕 ==References== 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「Nada Tunnel」の詳細全文を読む スポンサード リンク
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