Author(s): Darryl J. Calkins; Malcolm Mellor

Linked Author(s):

Keywords: No Keywords

Abstract: Lock wall icing conditions on the Great Lakes and St. Lawrence Seaway are described, and possible solutions are listed. Operating assumptions are laid down as a basis for consistent cost estimates, and selected deicing methods are considered, using figures condensed from a more detailed report. The estimates cover wall heating by embedded electrical cables and embedded fluid circulation systems, repetitive surface coating with salt solutions, deicing with an inflatable boot, scraping with backhoes, cutting with large chain saws, and slicing with high-pressure water jets. Initial costs vary from zero for contract arrangements, to over $600,000 for a deicing boot. Average annual cost, which covers direct operating costs plus an allowance for amortization, ranges from less than $4000 for a salt dispenser to more than $80,000 for a deicing boot. The chain saw concept, which has not yet been tested, appears to be positive and economical, with average annual costs of less than $10,000. The feasibility of deicing with salt solutions has not been investigated experimentally, but there is a strong economic motivation to make suitable field tests. The relative attractions of other methods will depend to some extent on the particular circumstances at various locks.

DOI:

Year: 1975