page_title: Cornell Road
section_title: Tunnels
hierarchical_section_title: Cornell Road / Tunnels
caption_attribution_description: The west portal of Northwest Cornell Road Tunnel 1, built in 1940 and the easternmost of two tunnels along Cornell Road in Portland, Oregon.
context_page_description: Cornell Road is an east–west street and traffic corridor in the Portland metropolitan area, in Multnomah and Washington counties in the U.S. state of Oregon. It crosses the Tualatin Mountains between the Willamette Valley and the city of Portland on the east and the Tualatin Valley and the city of Hillsboro on the west.
  Cornell Road runs between the western end of Northwest Lovejoy Street in the Hillside neighborhood of Portland to East Main Street in Hillsboro, passing through unincorporated parts of Washington County and through Beaverton on the way. On the west side of NW 185th Ave, it is called Northeast Cornell Road, as it runs through the northeast quadrant of Hillsboro.
  Although intended, on its section within the city of Portland, to be a neighborhood collector street with relatively low traffic volumes, it has often functioned as a major traffic street and commuter highway between downtown Portland and its western suburbs. It shares this role with more intensely busy traffic corridors along West Burnside Street and U.S. Route 26.
context_section_description: Cornell Road passes through two tunnels drilled through basalt in the West Hills. Laborers hired by the Works Progress Administration built both, the first and easternmost in 1940 and the second in 1941. Northwest Cornell Road Tunnel 1 is 500 feet (150 m) long and has a horizontal clearance of about 28 feet (8.5 m). Tunnel 2 is 250 feet (76 m) long with a horizontal clearance of about 27 feet (8.2 m). Both are lined with concrete and have portals of stone masonry.
caption: West portal of one of the road's two tunnels in the West Hills of Portland
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