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dc.contributorUnited States. Coast Guard.-
dc.contributor.authorAshton, George D.-
dc.descriptionSpecial Report-
dc.descriptionAbstract: Ice management problems associated with operation of a Mechanical Ice Cutter for use in icebreaking as an aid to winter navigation are examined. The study concentrates on effects occurring after the cutting operation. Included in the evaluation are assessments of refreezing rates, movement and disposition of the slabs produced by the cutting, and an examination of effects related to ice jams. The evaluation is specific to the upper Mississippi River, in particular Pool 19 above Lock and Dam 19 at Keokuk, Iowa. It was found that most ice production during a winter occurs during a small fraction of the period of ice cover; hence removal after these short periods may allow navigation to proceed for significant wintertime periods. A relation was found between cut slab dimensions and critical velocity to move them that will enable estimates to be made of accumulation. Breakage of adjacent ice by vessel waves was found to impose a possible restraint on vessel speed but not a serious one.-
dc.publisherCold Regions Research and Engineering Laboratory (U.S.)-
dc.publisherEngineer Research and Development Center (U.S.)-
dc.relation.ispartofseriesSpecial report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 214.-
dc.rightsApproved for public release; distribution is unlimited.-
dc.sourceThis Digital Resource was created from scans of the Print Resource-
dc.subjectIce disintegration-
dc.subjectIce navigation-
dc.subjectIce openings-
dc.subjectInland waterways-
dc.subjectRiver ice-
dc.subjectLake ice-
dc.subjectLock and Dam 19, Mississippi River-
dc.subjectKeokuk, Iowa-
dc.subjectWaterway transportation-
dc.titleEvaluation of ice management problems associated with operation of a mechanical ice cutter on the Mississippi River-
Appears in Collections:Special Report

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