Characteristics of Ice in Whitefish Bay and St. Marys River During January, February and March 1979.

• Main Author: Vance,George P
• Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
• Format: Text
• Language: English
• Published: 1980
• Subjects: Snow; Ice and Permafrost; Mechanics; *ICE; THICKNESS; MECHANICAL PROPERTIES; STEEL; PROFILES; SEASONAL VARIATIONS; WINTER; SNOW COVER; PROTECTIVE COATINGS; METAL PLATES; RIVERS; FRICTION; MICHIGAN; LAKE SUPERIOR; *Icebreaking; River ice; Lake ice; Whitefish Bay; Saint Marys River(Michigan); St. Marys River; Ice; permafrost
• Online Access: http://www.dtic.mil/docs/citations/ADA089950; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA089950

This report presents data on the full-scale trails of the U.S. Coast Guard Icebreaker Katmai Bay, which was tested in plate ice that varied in thickness from 10 to 33 in. (25.4 to 83.82 cm) and had a snow cover of 1 to 6 in. (2.54 to 15.24 cm). In January the average temperature was -5 C, and the ice flexural strength was 13,363 lb/sq ft (640 kPa). In March the average temperature was -2 C and the ice flexural strength was 11,643 lb/sq ft (560 kPa). The specific weight (density) of the ice was 0.894 g/cc. The specific weight of the snow was in the area of 0.32 g/cc. The coefficient of friction between the ice/snow and steel plate (coated and uncoated) varied from a low of 0.02 in the dynamic case of ice on the Inerta 160 coating to 0.47 for the static case of snow on a rusty steel plate.