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Location County Coordinates CA-30 CA-199: Central Pacific Railroad, Clipper Gap Tunnel Central Pacific Transcontinental Railroad, Tunnel 'O' Abandoned 1873 1984 1997 Union Pacific Railroad: Clipper Gap: Placer: CA-86
Chastellet du Gué de Jacob near Safed, 1178–1179; Tour de la Quarantaine , east of Jerusalem; Tell es-Safi (Blanchegarde) Properties in Acre, Israel, including the still-extant Templar Tunnel [1] [2] Château Pèlerin (fr. "Pilgrim Castle"), also known as Atlit Castle, 1218–1291 [3] Sidon, 1260–1268; Beaufort Castle, Lebanon, 1260–1268
Ft. McArthur Tunnel Complex: an abandoned World War II network connecting fortifications in San Pedro, CA. [10] The Lawson Adit is a tunnel constructed underneath UC Berkeley into the Berkeley Hills in the early 1900s for student mining research. [11] US Dept. of Defense Tunnel Warfare Center, China Lake [12] [13]
The historical Burro Schmidt Tunnel is located in the El Paso Mountains of the northern Mojave Desert, in eastern Kern County, southern California. It is a 0.5-mile (0.80 km) mining tunnel dug with hand tools and dynamite over a 38-year period by William "Burro" H. Schmidt (1871–1954).
It was discovered near San Diego's Otay Mesa border crossing in an area where more than a dozen other sophisticated tunnels have been found in the last two decades. Big cross-border tunnel is ...
The initial location for the north end of the tunnel was near Lyons Station Stagecoach Stop, which was abandoned due to frequent cave-ins caused by oil-soaked rock. The north end was moved a little further west towards the present town of Newhall, California. The north end of the tunnel excavation commenced in June 1875.
The tunnel opened to traffic on September 19, 1925 as the third-longest rail tunnel in the United States at 10,325 feet (2 mi; 3,147 m) in length. [ 4 ] [ 5 ] [ 6 ] The new tunnel and cutoff shortened the route by 1.29 miles (2.08 km) and was 132 feet (40 m) lower in elevation than the previous bore through the summit, Tunnel No. 6.
The tunnel, concealed with wooden panels and hidden access through a sewer, measured approximately 300 meters on the Mexican side, with dimensions of 1.80 meters in height and 1.20 meters in width.