Runoff by the Cruzet Tunnel : 無料・フリー素材/写真
Runoff by the Cruzet Tunnel / ballancio
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | Overseen by Cladius Crozet, the crossing was accomplished by building four tunnels, including the 4,273-foot (1,302 m) Blue Ridge Tunnel near the top of the pass. With construction proceeding from either side a decade before the invention of dynamite, the complex was dug though solid granite with only hand drills and black powder. The tunnel was less than 6 inches (150 mm) off perfect alignment when it was holed through on Christmas Day 1856.When completed, the Blue Ridge Tunnel was the longest in the United States and one of the longest tunnels in the world, a remarkable feat of engineering. It opened to rail traffic in April 1858, and was considered to be one of the engineering wonders of the modern world.source: Jameson, Lynn J. "Ain't no mountain wide enough" The Hook. Charlottesville, VA. 2002-11-21 |
| 撮影日 | 2013-04-13 17:11:15 |
| 撮影者 | ballancio , Charlotte, NC, USA |
| 撮影地 | |
| カメラ | Canon EOS 5D Mark II , Canon |
| 露出 | f/16.0 |
| 開放F値 | f/16.0 |
| 焦点距離 | 24 mm |