Pengra Pass rail route

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West portal of Tunnel No. 3 (Summit Tunnel), beneath Pengra Pass in Oregon. The tunnel was built by the Southern Pacific Railroad in 1925. SP Natron Tunnel 3 West 1997.jpg
West portal of Tunnel No. 3 (Summit Tunnel), beneath Pengra Pass in Oregon. The tunnel was built by the Southern Pacific Railroad in 1925.
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Tunnel 11
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Tunnel 9
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Shady Creek Bridge
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Tunnel 7
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Cascade Summit
elev. 4,885 ft (1,489 m)
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Chemult
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Klamath Falls
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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. [1] [2] Its name denotes a mountain pass on the Lane CountyKlamath County boundary in the Cascade Mountains of Oregon, about 1.5 miles (2.4 km) from Willamette Pass. [3] The line heads southeast from Eugene, up the Cascades and over Pengra Pass, then southward beside U.S. Route 97 to Klamath Falls, where it splits in two, each track continuing into California. [4] The route has at least 22 tunnels, several snow sheds and multiple bridges across canyons.[ citation needed ] BNSF has trackage rights between Klamath Falls and Chemult. [5]

Contents

The Pengra Pass route was built to provide trains running between Eugene and California with a cheaper and otherwise more practical option than to follow the older Siskiyou Pass route, which runs south from Eugene and over Siskiyou Pass to California. The new route opened in February 1926. [6] As a result, the Siskiyou Pass route was rendered nearly obsolete. In 2008, a landslide in the area shut down rail traffic for 105 days, which forced Union Pacific trains to make lengthy detours and Amtrak to halt services between Eugene and Sacramento, severing a key west coast rail link. [7] [8] [9] In 2011, no trains had used the Siskiyou Pass route in almost a decade. [10] By 2015 however, that line was reopening to relieve I-5 of local truck traffic. On May 29, 2018, one of the tunnels, known as Tunnel 11, caved in during scheduled maintenance work, shutting down rail traffic for 3 weeks. Union Pacific rerouted their freight trains running between Northern California and Portland through a lengthy detour, while Amtrak service did not operate between Eugene and Sacramento (initially between Eugene and Klamath Falls, with a bus bridge between the two points). [11] [12] [13] [14]

Nonetheless, a major helper operation is demanded by the Pengra Pass route's 44 miles (71 km) of constant grade—the longest anywhere on the former Southern Pacific system, including Donner Pass.[ citation needed ]

The right-of-way is surrounded by waterfalls and streams running through a Douglas fir forest. At many locations, the track runs atop the steep southern slopes of the Salt Creek canyon.

See also

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Tunnel Number 41, or the Big Hole, is a single-track railway tunnel underneath Mount Judah in the Sierra Nevada, near Norden, California. It is owned by the Union Pacific Railroad, in service as a part of the Roseville Subdivision of the Overland Route. Daily freight trains as well as Amtrak's California Zephyr utilize the line.

References

  1. Solomon, Brian (1999). Southern Pacific Railroad. MBI Publishing Company. p. 38. ISBN   978-0-7603-0614-7.
  2. "Southern Pacific Railroad Natron Cutoff, Tunnel 3, Milepost 537.77, Odell Lake, Klamath County, OR". Historic American Engineering Record. Library of Congress. Retrieved January 16, 2016.
  3. "Pengra Pass Loops Snow Trail". U.S. Forest Service. Retrieved January 16, 2016.
  4. Solomon, Brian (2005). Southern Pacific Passenger Trains. St. Paul, Minnesota: MBI Publishing Company. p. 88. ISBN   0-7603-1795-X.
  5. BNSF Network Map (PDF) (Map). BNSF. January 2024.
  6. Solomon, Brian (2005). Southern Pacific Passenger Trains. Voyageur Press. pp. 85–86. ISBN   9781610605076.
  7. "Union Pacific Moves Mountains to Restore Train Service; Back on Track after Major Oregon Mudslide" (Press release). Roseville, Calif.: Union Pacific. May 6, 2008. Retrieved September 19, 2018.
  8. Palmer, Susan (February 20, 2008). "Major Landslide in Willamette National Forest Caused by 1992 Clearcut". Eugene Register-Guard. Retrieved September 19, 2018.
  9. Glascock, Stuart (March 3, 2008). "Landslide is a mess -- and a boon". Los Angeles Times. Retrieved September 19, 2018.
  10. LaLande, Jeff. "Siskiyou Pass". The Oregon Encyclopedia. Portland State University. Retrieved January 16, 2016.
  11. "UP Cascade (Oregon) Shut-down - Tunnel Collapse!!!" . Retrieved September 19, 2018.
  12. "Through Dirt, Rock and Water: Reopening Tunnel No. 11". Inside Track. Union Pacific. July 18, 2018. Retrieved September 19, 2018.
  13. Moran, Jack (May 30, 2018). "Tunnel collapse forces Amtrak to bus passengers between Eugene, Klamath Falls". Eugene Register-Guard . Retrieved September 19, 2018.
  14. Franz, Justin (May 30, 2018). "UPDATE: Tunnel collapse shuts down UP in the Cascades". Trains Magazine. Retrieved September 19, 2018.

Further reading