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final design studies , the availability of the following data will be help- <br /> ful in addition to the material data already collected. <br /> C <br /> • 1 .7.1 Site Contour Maps <br /> In order to refine the volumetrics and proper design of diversion <br /> channels, collection ditches , desilting ponds, etc. , the following types <br /> of maps would be most helpful : <br /> • The present 1" = 200' map of the plant and refuse area does not <br /> extend far enough towards the south. This map needs to be extended <br /> at least a thousand feet southward. Such a contour map should <br /> have location of existing roads, channels, culverts, pumps, etc. <br /> marked on it. <br /> • A large scale contour map (1" = 100' or 1" = 200' ) of the natural <br /> ground base of the present refuse pile. At present no contour <br /> map, other than USGS (1 " = 2000' ) map of this area is available. <br /> 1 .7.2 Hydrological Data <br /> In order to design and construct all water control structures, it is <br /> necessary to better define the hydrological and meteorological conditions <br /> of the refuse area. <br /> 1 .7.3 Detailed Design <br /> Along with the various data sources mentioned above, analysis of the <br /> results of laboratory geotechnicaI tests completed will provide specific <br /> definition of the refuse pile materials. It is recommended that a detailed <br /> design be performed once a final site has been selected meeting the long <br /> range refuse disposal requirement of the Mid-Continent mines. This final <br /> design would provide for a specific plan of placement for operation plan- <br /> ning and would also provide detailed justification of refuse pile design <br /> to applicable State and Federal agencies . <br /> 1-19 <br />