Avalanche atlas
Subtitle: North Cascades Highway, SR-20.
Contributors: University of Washington. Dept. of Civil Engineering.; Washington (State). Dept. of Highways.; United States. Dept. of Transportation.
Publisher: Geophysics Program and Dept. of Civil Engineering, University of Washington
Published: 1971
Place of publication: [Seattle
Language: eng
Number of pages: 175
Subjects: Roads -- Maintenance and repair; Avalanches -- Washington (State) -- Cascade Range -- Control
Other titles: North Cascades Highway.
Notes: Cover title.

"Prepared for Washington State Highway Commission, Department of Highways and in cooperation with U. S. Department of Transportation, Federal Highway Administration."