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  • All fields: Railroad Tunnels--Colorado--Boulder County--1970-1980.
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    • Needle's Eye Tunnel, Boulder County, Colo.

    • View of Needle's Eye Tunnel located on the Continental Divide in Boulder County, Colo. near Rollins Pass a.k.a. Corona Pass. A part of the Moffat Road, it was built in the early 20th century by Daniel Moffat as part of the Denver, Northwestern...
    • Railroad Tunnels--Colorado--Boulder County--1970-1980.; Needle's Eye Tunnel (Boulder County, Colo.)--1970-1980.; Boulder County (Colo.)--1970-1980.; Denver, Northwestern, and Pacific Railway--Pictorial works.; Railroad tunnels--Colorado--Boulder...
    • 1974

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