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Colorado River. River is at present cutting in solid granite and has penetrated about 1000 feet.

Northern Arizona University. Cline Library.
  • Willey
  • L.C.
  • Schliewen
  • Edward
  • Davol
  • George K.
  • Aerial Tramways--Arizona--Grand Canyon
  • Arizona--Grand Canyon--Surveys
  • Surveyors--Arizona--Grand Canyon
  • Grand Canyon (Ariz.)
  • Colorado River (Colo.-Mexico)
  • Engineering


Record level- 168 photographic images, including photo album cover, of 323 total black-and-white photographs and postcards in the collection, all but one of which are in the album, depicting an engineering expedition across the Canyon, August - December, 1919, to survey for an aerial tramway.

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