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<br />• <br />• <br />Revised 1/z8/8o ~ ~. ~~~_"'~~' <br />Section 785.19(c) Continued <br />JAN ~ ~~ ~:~~sJ <br />h~~l(~CD LAND RECI_A".:~.?IOV <br />Ce!e. Uept. of Natural Resources <br />General <br />A field investigation and technical evaluation of all drainages containing <br />streams within and adjacent to the mine plan area has been conducted in <br />accordance with this Section, the draft OSM Technical Guideline, "Technical <br />Identification and Study of Alluvial Valley Floors", dated revised <br />August 15, 1978, and in response to the concerns expressed th' the MLR <br />and OSM technical staffs during the adequacy review meetings held in <br />January, 1980. The investigation consisted of reconnaisance of the <br />general area defined on the Twentymile Park Hydrology (Map 6), detailed <br />research of a specific study area, and a flood irrigation feasibility <br />study of the Foidel Creek watershed adjacent to the mine plan area <br />(F~hibit 27). The investigation was conducted using the scientific <br />method of reviewing available literature; defining the categories of <br />data collection and the areas to be studied in detail; collecting field <br />data and observations; assimilating data into tables, diagrams and rreps; <br />interpreting the data in each category; and drawing final conclusions. <br />In accordance with 30 CFR 785.19(c), this report is divided into four <br />major subheadings: Geomorphic Characteristics; Water Availability <br />Characteristics; Effects on Essential Hydrologic Functions; and Conclusions. <br />GEOMORPHIC CHARACTERISTICS <br />The investigation was initiated by mapping unconsolidated deposits <br />within the general area, using published and unpublished geologic maps. <br />785-9(0) <br />