RAF DES Upper Tenmile Mining Creek District - This Task Order begins the remedial design portions for the Susie, Lee Mountain, and Red Water Adits within the Site boundaries. It will accomplish this through several years of synoptic sampling events, as well as several studies to conclude the Phase 4 approach to water treatment specified in the ROD. The work will culminate with a conceptual site model and treatability study for remedial design of the Susie, Lee Mountain, and Red Water Adits.