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The Effectiveness And Influences Of The Navigation Ice Booms On The St Marys River

Author : Roscoe E. Perham
ISBN : MINN:31951002915394S
Genre : Ice navigation
File Size : 85. 93 MB
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Monthly Catalog Of United States Government Publications

Author : United States. Superintendent of Documents
ISBN : UCR:31210024274605
Genre : Government publications
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February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index

Monthly Catalogue United States Public Documents

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ISBN : UIUC:30112063912130
Genre : Government publications
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Usa Crrel Benchnotes

Author : Cold Regions Research and Engineering Laboratory (U.S.)
ISBN : UOM:39015040294764
Genre : Cold regions
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Crrel Benchnotes

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ISBN : OSU:32435029830858
Genre : Cold regions
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The Effectiveness And Influences Of The Navigation Ice Booms On The St Marys River

Author : Roscoe E. Perham
ISBN : OCLC:10756969
Genre : Ice navigation
File Size : 54. 44 MB
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Ice problems developed in the Sault Ste. Marie, Michigan, portion of the St. Marys River because of winter navigation Passing ships and natural influences moved ice from Soo Harbor into Little Rapids Cut in sufficient quantities to jam, cause high water in the harbor, and prevent further ship passage. After physical model and engineering studies, two ice booms with a total span of 1375 ft (419 m) with a 250-ft (76-m) navigation opening between were installed at the head of Little Rapids Cut in 1975. A modest field study program on the booms was conducted for the ensuring four winters to determine ice and boom interaction and the effects of ship passages on the system. Forces on some anchors were recorded and supplemental data were taken by local personnel. Several reports have been written about the booms' early operations. This paper presents four-year summary of the main effects of the booms on ice and ship interaction and vice versa. Throughout the four winter seasons, the small quantities of ice lost over and between the booms were manageable. Ships usually passed through the boom without influencing the boom force levels, but at time they brought about large changes. One boom needed strengthening, and artificial islands were added for upstream ice stability. Coast Guard icebreakers were also a necessary part of winter navigation in this area.

Winter Navigation On The Great Lakes

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ISBN : 9781428914742
Genre : Great Lakes (North America)
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The Effectiveness And Influence Of The Navigation Ice Booms On The St Mary S River

Author : Cold Regions Research and Engineering Laboratory (U.S.)
ISBN : OCLC:1087101206
Genre :
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St Marys River Ice Booms

Author : Roscoe E. Perham
ISBN : MINN:31951002839341O
Genre : Ice
File Size : 76. 76 MB
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Final Survey Study For Great Lakes And St Lawrence Seaway Navigation Season Extension Appendices H L

Author : United States. Army. Corps of Engineers. Detroit District
ISBN : UIUC:30112002986203
Genre : Great Lakes (North America)
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Great Lakes St Lawrence Seaway Winter Navigation Program Interim Feasibility Report

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ISBN : NWU:35556031304108
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Great Lakes St Lawrence Seaway Navigation Season Extension Interim Feasibility Study

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ISBN : NWU:35556031252166
Genre : Great Lakes (North America)
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Great Lakes St Lawrence Seaway Navigation Extension

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ISBN : NWU:35556031257256
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Great Lakes And St Lawrence Seaway Navigation Season Extension Demonstration Program

Author : Saint Lawrence Seaway Development Corporation. Ice Control Work Group
ISBN : MINN:31951D03562992R
Genre : Ice on rivers, lakes, etc
File Size : 28. 83 MB
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Final Survey Study For Great Lakes And St Lawrence Seaway Navigation Season Extension Appendix A Problem Identification Appendix B Formulation Of Detailed Plans

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ISBN : UIUC:30112101590617
Genre : Ice navigation
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Final Survey Study For Great Lakes And St Lawrence Seaway Navigation Season Extension Appendixes A B

Author : United States. Army. Corps of Engineers. Detroit District
ISBN : UOM:39015013028256
Genre : Great Lakes (North America)
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Determining The Effectiveness Of A Navigable Ice Boom

Author : Roscoe E. Perham
ISBN : UOM:39015091135692
Genre : Ice on rivers, lakes, etc
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The performance of a navigable ice boom was studied by monitoring the progression of the leading edge of the unconsolidated ice cover over a reach of the St. Marys River directly downstream of the boom. Ice and hydraulic data were obtained for four winters from 1975-76 through 1978-79 for the St. Marys River at Sault Ste. Marie, Michigan. The ice cover progression rate was highest in early winter. The unconsolidated ice cover in the channel was estimated to have a thickness of at least 0.91 m and a porosity of 30%. During early winter the ice discharge per vessel passage averaged approximately 5500 cu m. for the four years. Model tests for this site had indicated that without an ice control structure of any type, an ice release of 63,000 cu m per ship passage could be expected; with an ice boom the release would be 12,300 cu m per ship passage. If a 100% effective boom releases no ice at all, then the measured rate indicates that the boom is 92% effective. On-site observations and time-lapse movies provided partial verification. Ice flowed down the ship track and through the navigation opening fairly often. Occasionally ice came over the boom in response to ship movements and natural causes. Keywords: Ice booms; Ice control; Winter navigation.

Accessions List

Author : Assessment and Information Services Center (U.S.). Library and Information Services Division
ISBN : IND:30000090024989
Genre : Earth sciences
File Size : 25. 88 MB
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Accessions List

Author : Environmental Science Information Center. Library and Information Services Division
ISBN : MINN:30000010404386
Genre : Ecology
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Accessions List

Author : United States. National Environmental Satellite, Data, and Information Service. Library and Information Services Division
ISBN : STANFORD:36105133452669
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