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Southern Pacific Railroad Natron Cutoff, Tunnel 3 1925 1997 Southern Pacific Railroad, Cascade Subdivision: Pengra Pass Odell Lake: Klamath: OR-93: Southern Pacific Railroad Natron Cutoff, Tunnel 5 1927 1997
The Robertson Tunnel is a twin-bore light rail tunnel through the Tualatin Mountains west of Portland, Oregon, United States, used by the MAX Blue and Red Lines. The tunnel is 2.9 miles (4.7 kilometers) long [ 1 ] and consists of twin 21-foot-diameter (6.4 m) tunnels.
The tunnel was driven by the Portland and Southwestern Railroad, whose chief business was logging. Unusually for a logging railroad, the Portland and Southwestern built tunnels. In order to reach the far side of the Nehalem divide in the Northern Oregon Coast Range, the railroad undertook a 1,712-foot (522 m) tunnel. Some work was started in ...
The Pengra Pass rail route, also known as the Natron Cutoff, the Cascade Subdivision, or the Cascade Line, is a Union Pacific Railroad line (originally a Southern Pacific Railroad line) connecting Eugene, Oregon, with Klamath Falls, Oregon. Construction of the line began in 1905 and was completed in the mid-1920s.
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Two tunnels in quick sequence, built originally in 1920. Drilled out of a basalt outcropping with an 8.7 feet (2.7 m) radius, from the west an 81 feet (25 m) bore, then 24 feet (7.3 m) in the open, then a 288 feet (88 m) bore. East tunnel has two windows, one with a cliffside walkway to the open inbetween area.
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KBVR-FM 88.7 was originally broadcast from Shepherd Hall on the Oregon State University Campus in 1965 at 90.1 MHz with 10 watts of power and a 4 to 5 mile listening radius. The station relocated to Snell Hall in 1977, and continued to expand its listening area to the current radius of 30 miles using 340 watts of power and moved to its current ...