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III IIIIIIIIIIIIIIII <br />999 <br />TRAPPER MINING INC. <br />Mr. Joseph J. Dudash <br />Environmental Protection Specialist <br />Colorado Division of Minerals & Geology <br />1313 Sherman Street, Room 215 <br />Denver CO 80203 <br />Dear Joe: <br />August 23, 1996 '"'" '~~-f'Fl~~tf_(~ <br />~~~' H I~~•i' <br />c <br />f~IHI5i04 OI 11%dflL'rdla is G;. ~,.. ~.. <br />Re: Trapper Mining Inc., Permit No. C-81-0]0 <br />Minor Revision MR-149, Construction of Diversion Ditch for Cuvert A-3, Update Map MSI and <br />Revised Culvert Numbering and Sizing Information. <br />On May 2, 1996 the Division approved MR-144, the Relocation of Culvert A-3 in the West Pyeatt drainage. This <br />revision (MR-149) is filed to allow construction of a short diversion to channel the discharge from culvert A-3 back <br />into the original nondisturbed drainage. Permit Table 4.8-3 presents the sizing for the diversion ditch to be con- <br />structed (West Pyeatt No. 1) and map MSI shows the location. The SEDCAD riprap channel design calculations <br />are also included for the Wesl Pyeatt Diversion and should be placed in Appendix Q, Section XVII. An additional <br />0.2 acres of disturbance is forecast with bond estimated at $990. Sufficient funds are available in Trapper's bond. <br />Additional minor changes have also been made to Map M51. These changes aze: <br />1) Removal of Culvert A-lA. This is a french drain and not part of [he drainage and sediment conVOl system. <br />This culvert reference is also removed from Table 4.8.1. <br />2) Orientation of culvert JGag-1. <br />3) Plotting of the drainage and sediment control system onto new M-51 base maps which are the same as those <br />used for the MIO series and annual reports. <br />4) Removal of the East Pyeatt collection ditch since Ashmore pi[ advancement has removed the ditch. <br />5) Revised culvert numbering of culverts in the A and F pit areas. <br />6) More accurate location of culverts proposed for the F pit azea. <br />In addition, Map M9 (Roads) has been revised to show minor modifications to the F pit road system. <br />Please contact me if you have any questions or need additional information to process this request. <br />Sincerely,I// -/ - <br />~~ r~t2rtGGLV~ <br />Forrest V. Luke <br />Environmental Manager <br />LW WJ~b <br />~DMG\9b-0BII~ <br />Encl <br />c File 10931.4 <br />Pemtit No¢book <br />P.O. Box 187 Craig, Colorado 81626 (303) 824-4401 <br />