Accession Number : AD0768169

Title :   Icebreaking by Tow on the Mississippi River.

Descriptive Note : Special rept.,

Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H

Personal Author(s) : Ashton,G. D. ; DenHartog,S. L. ; Hanamoto,B.

Report Date : AUG 1973

Pagination or Media Count : 77

Abstract : A field investigation of icebreaking by the motor vessel Renee G, operating on the Mississippi River between Alton, IL, and Fort Madison, IA, is reported. The operation encountered a wide variety of ice conditions and was performed with a variety of barge configurations and arrangements. Important qualitative observations of the nature and difficulties encountered while icebreaking were made; and, by instrumenting the propeller shafts and using load cells between the towboat and the barges, quantitative information was obtained on the resistance encountered while icebreaking. Also described are the effects of repeated passage through an ice cover, navigation procedures peculiar to icebreaking, and minor damage sustained by the towboat. (Author)

Descriptors :   (*ICE, FRACTURE(MECHANICS)), (*RIVERS, ICE), TEST METHODS, BARGES, DRAG, BOATS, TENSILE PROPERTIES, RIVER CURRENTS, FLEXURAL STRENGTH, THRUST

Subject Categories : Snow, Ice and Permafrost

Distribution Statement : APPROVED FOR PUBLIC RELEASE