These alluvial deposits on the continental shelf have been formed along the margins of the continents by the wave erosion or by deposition of marine sediments. It is unnecessary to go beyond this conference and its predecessors to realize the extreme interest that has developed in the offshore mining of alluvial deposits of minerals. This project was undertaken to avoid the complete loss of the combined knowledge and experience of present-day dredge men and to provide for a future when dredges of this size may be needed, especially in the offshore area. in spite of the traditional low operating costs. Dredging of alluvial minerals with a bucket-line dredge is becoming a lost art in the U.S. This design will include the latest improvements dictated by years of experience and new technology. This capacity will vary according to the mineral being mined and according to the material in which the mineral is found.
of Commerce, National Oceanic and Atmospheric Administration (NOAA), has converted the basic design of the Panama Canal dredge to a mining unit by the addition of a gravity treatment plant that will have a capacity of 2,200-cu yd/hour. Through the courtesy of the Yuba Industries, Inc., the Marine Minerals Technology Center (MMTC), an environmental research laboratory for the U.S. The dredge design incorporated the use of 54-cu-ft buckets, which would dig 148 ft below water level. Army Corps of Engineers the results of an extensive engineering study, performed under a contract to determine the feasibility, economics and the design of a bucket-line excavating dredge for a new sea level Panama Canal. In addition, numerous construction jobs for ports and harbors have been completed with bucket-line dredges. More than 10 billion cu yd of ore-bearing alluvial material containing gold, platinum group or tin have been mined over the years with various sizes of bucket-line dredges.
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