[en] The development of a system for the reduction and utilization of gamma log data for uranium ore bodies is described. This system, available from Western Nuclear, Inc., on a source license basis, has proved to be extremely effective for the reduction of gamma log data. Highlights of a new system which is being developed by Phelps Dodge's corporate regional data center are also discussed. This new system designed to more heavily utilize geostatistical concepts and hexagonal prisms for block modeling, will also provide the necessary interface to the mine haulage equipment dispatching systems developed by Phelps Dodge. This will allow for load by load analyses of material profitability, which will significantly enhance the economic benefits of the dispatching systems