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|Title:||Ice cap access route, Narssarssuaq, Greenland : location and engineering evaluation|
|Authors:||Leighty, Robert Dwaine, 1930-|
Poulin, Ambrose O.
|Publisher:||U.S. Army Snow, Ice, and Permafrost Research Establishment.|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||SIPRE report ; 48.|
Summary: In 1956 a reconnaissance of the southwestern coast of Greenland was conducted for the purpose of selecting an area which would provide year-round access to the ice cap. During the summer of 1957 the terrain between Narssarssuaq and the ice cap was studied in detail and an overland route from the air base to the ice cap was located and surveyed. The route is approximately 45 miles long and extends from the bridge crossing at the air base, which is near sea level, to the ice cap, at a ground elevation of 3942 ft at the end of the surveyed route. The location established utilizes to best advantage the natural terrain slopes and materials. The selected location is such that about 95% of the grades will be 6% or less and none will exceed 10%. Two locations will require switchbacks because of steep natural slopes. Nine bridges will be required along the route, with a combined length estimated at 1260 ft. Three of them may be in excess of 100 ft each. Foundations in rock will be available for seven bridges while gravel with boulders will provide the foundation for two. The topography throughout most of the route is quite rough and has resulted in severe problems of grade and alignment. For the most part the route is on rocky terrain, and earthwork will necessitate considerable blasting throughout much of the route. The rocks are predominately jointed and fractured, fine to medium grained granite with felsitic and basalt intrusions in the form of dikes and small stocks occurring at scattered locations. Some metamorphic rocks occur near Gannet Bay. Where the route has been placed on side slopes, blasting of large boulders and talus materials will be a problem of some magnitude. At many locations there are good sources of granular materials which can be utilized on an economical haul basis. The report discusses (1) the physical characteristics of the terrain between Narssarssuaq and the ice cap, (2) illustrated description and general engineering analysis of the entire route, section by section, (3) possible alternate routes, and (4) recommendations for continued study. Because of space, data concerning plan, profile, and cross-sections as obtained by and prepared by personnel of USA EATF have not been made a part of this report. Such data are available from the Commanding Officer of that organization. A 16-mm color movie film on the project is in process of production. This will be released by 1 June 1958. Recommendations for future work prior to construction include obtaining large-scale aerial photography of the route and additional information of important areas and possible alternates along the route. Additional recommendations are given for a camp area near the ice-cap access point and design considerations for the road. NOTE: This file is very large. Allow your browser several minutes to download the file.
|Rights:||Approved for public release; distribution is unlimited.|
|Appears in Collections:||Technical Report|
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|SIPRE-Technical-Report-48.pdf||47.13 MB||Adobe PDF|