NORTH CASCADES HIGHWAY SR-20. AVALANCHE ATLAS-SUPPLEMENT

In June of 1971 an AVALANCHE ATLAS for the North Cascades Highway was prepared and distributed in loose-leaf form so that it could be supplemented from time to time as more information became available on avalanche activity along the highway. During the three winters since publication of the Atlas, ground and aerial reconnaissance during the winters and the results from a full-time observer, the last two years stationed at Washington Pass, have produced such information, which is now incorporated in the supplement.

  • Supplemental Notes:
    • See also PB-220 336.
  • Corporate Authors:

    University of Washington, Seattle

    Seattle, WA  USA  98195

    Washington State Department of Highways

    Olympia, WA  USA 

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Authors:
    • Brown, C B
    • EVANS, R J
    • Fox, T
    • Lachapelle, E R
    • Mcclung, D M
  • Publication Date: 1974-5

Media Info

  • Pagination: 47 p.

Filing Info

  • Accession Number: 00080231
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Contract Numbers: DOT-Y-1301
  • Files: NTIS, USDOT, STATEDOT
  • Created Date: Jan 29 1975 12:00AM