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Paper presented to the World Dredging Conference, Vancouver, October 29-31, 1980. Describes the construction of artificial islands for exploration and development of oil and gas resources in the Beaufort Sea.
"The following report presents the findings of a feasibility study, authorized by Gulf Oil Canada Limited (GOCAN) in March of 1977, to investigate the possibility of constructing an artificial island for the production of hydro-carbons in 95ft. of water in the Beaufort Sea, NWT. In order to provide a practical base for the study, the 1976 exploration drill site at Tingmiark was chosen by GOCAN as a site with environmental and soil characteristics representative of possible future hydro-carbon production sites in the general area. The project team chosen to perform the study consists of Swan Wooster Engineering Co. Ltd. (Swanco) to provide the civil engineering, Golder Brawner and Associates Ltd. (Golder Associates) to provide the geotechnical engineering, and Northern Construction Company to provide the contracting expertise and cost estimates. The scope of work involved in the study was divided into three tasks or sub-sections. Task 1, the First Stage, consisted of an initial or conceptual design stage of three Concept Islands based on design concepts proposed by Gocan, assessment of the methods of analysis and review of sources of materials and equipment. Task 2, the Second Stage, consisted of performing the analysis of wave and current scour and soil resistance to ice attack on modified versions of the Concept Islands. Task 3, or the Third Stage of the study, consisted of the finalization of the Concept Islands, a more comprehensive assessment of normal ice regime and ice rubble participation, finalization of the equipment construction schedules and cost estimates for capital and maintenance costs. ... The findings of this feasibility study indicate that Concept Island 2B (revised) would be more suitable for location in the 95ft. water depth of the Beaufort Sea than Concept Island 1 .... A feasibility study of this nature involving building an artificial island in 95ft. of water, twice the water depth attempted to date, and in the shear ice zone 50 miles offshore and beyond the present experience with island construction in the land-fast ice zone, is bound to turn up many areas requiring further study. A number of these are listed in the final Section 15 as considerations for ongoing studies"--ASTIS database.
"Between Dome Petroleum Company of Calgary - Alberta, Canada, and Nedeco of The Hague, Holland, an agreement has been concluded for technical assistance in the study of the possibilities of an artificial island in the Beaufort Sea for oil exploitation. In this framework an order for a partial study was granted to Rijkswaterstaat in order to determine the slopes which can be realized in the construction of such an island. This study has been carried out in close cooperation with the Delft Soil Mechanics Laboratory. ... The question, if a slope of 1 : 5 could be realized, has been added to this problem definition. The aim of the study was to determine how, as a function of equipment execution methods, borrow material properties and observing the physical boundary conditions c.q. circumstances, an as steep as possible slope could be realized, with sand and construction material. In the study other construction methods, should not be envisaged at this stage. The study, which has the character of a prefeasibility study, should be carried out as a desk study in which the different determining parameters should be varied as much as possible. (Au)"--ASTIS [online] database.