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DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1717 Sherman 51., Room ?15 <br />Denser. CO 80?03 <br />Phnne: (3071 866-7567 <br />FAX COIF 3i]-8706 <br />November 24, 1992 <br />Mr. Larry Henderson <br />Trapper Mining, Inc. <br />P.0. Box 187 <br />Craig, CO 81626 <br />RE: Review of PAR responses concerning Flume Gul <br />Snowmelt Calculations, Trapper Mine, C-81-O1 <br />Dear Mr. Henderson: <br />The Division has completed its review of the info <br />cover letter dated November 11, 1992. Please res <br />such that enough time is allowed for Division rev <br />by December 30, 1992. <br />Snowmelt calculations - the Division has rev <br />with Trapper's conclusion which indicates mo <br />10 yr, 24-hr. rainfall amount of 1.4 inches <br />properly size hydrologic structures for abov <br />24-hour period. It is recognized that using <br />the potential exists for runoff exceeding tw <br />this assumes that a snow pack containing at <br />exists instantaneously (with no previous mel <br />concurs that given the difficult task of qua <br />calculations, on-the-ground performance is k <br />problematic areas. <br />-- iii iiiiii~ii~i~i~ii <br />999 <br />~4~ ~~ <br />~6 . <br />Grn~ernor~~ <br />.N ~chael B. Lnnq <br />Division Director <br />AVF Designation and <br />Ltion submitted in the <br />Id to the following issues <br />I and subsequent approval <br />+ed this section and agrees <br />ling using the May-October <br />luld be adequate to <br />average Snowmelt over a <br />:tual data for 1986-1987, <br />inches in April. Of course <br />ist two inches of moisture <br />Jg). The Division also <br />ifying Snowmelt <br />to identifying potential <br />AVF designation of Flume Gulch - the Divisio nos reviewed the <br />information submitted and finds that additio 1 information is necessary <br />in order to make a determination on the prey ce (or lack of) an AVF. <br />Please refer to Rule 2.06.8(3)(b)(i)-(vi) ~ <br />a> the map included in Appendix H is not ~ sufficient detail to allow <br />positive correlation of the area label as 08 by the Soil <br />Conservation Service. This is the onl area they felt has the <br />potential to be an AVF. Also, the loc ion of the test pits were <br />not spotted on the map. Please provid test pit locations as well <br />as mapping of the unconsolidated strea deposits (area 08) on map <br />M58. <br />b> What is the first irrigation headgate wnstream from the Trapper <br />Mine permit boundary along Flume Gulch, <br /> <br />