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CUT.OWYO CURL COMPANY <br />SF.DIMEN'1' POND ANALYSi:S <br />'I'ele-conference Meeting Notes <br />Prepnttclliy Tcrr,crt1atriz <br />March 7, 1997 <br />10:15 ant <br />Attending: <br />Lrica Crosby (UMC:) Byrort W;tlkrr (UMG) <br />Juan Garcia, P.L. (Colowyo) Thomas Leidich, P.E. (1'ernM:Ltrix) <br />Kevin Kacntttcrrcll, L'.L:. (TernMatrix) <br />The following issues were disceLSSCCI and/or agreed upon: <br />The objective of this sediment pond esercisr was to convert the current storage <br />configuration of tltr sediment pvncls to a treatment configuration. All ponds were <br />evaluated to Lnake the Permit consistent throughout. <br />2. It was .suggcstrci that tlLC Colowyo Mittesite not be compared to other mines in the region <br />for seclintettt control practices, bcaiuse Colowyo pits are large open pia in configuration, <br />whereas the Seneca and Trapper Minc pits are clvwrL dip resulting in possible pit discharge. <br />3. Use of bonding maps to assess the worst-case configuration for the ponds is inappropriate <br />as they assume i00% closure effort. Currently, C;olowyo perforLns phased approaches to <br />their rcdamation consistent with state-of-the-practice mining technologies. <br />4. Topsoiled anti seeded acreages LLSed in the analyses of each of the ponds do not match she <br />annual reelaLttation map or the spoil grading map e{isturhed areas according to Lrica. <br />Current maps show a total of 600 acres of clisturhance for the F,:ut Pit and the Section 16 <br />Pit. The total topsoiled and seeded watershed area contributing to the Section lli, Streeter, <br />anti Gulch A ponds is approximately J00 arras. Also the topsoiled and seeded bvunclaries <br />on the maps vary from pond co pond and do not exactly nmtch the redamation mine plan <br />according to Map 29 of the Colowyo Permit. <br />C;LLrrent mining practices include pktased approaclLCS tv reclunation of the final pit <br />area consistent with other mime .sites. The Pit area is left open to collect disturbed <br />area runoff without discharging to the sediment control ponds. The spoil piles arc <br />graded into clte final pit in a jigsaw-like fashion reclaiming arCaS as cllcy :1ChLGYC <br />final grade. Once the pie is put to final grade ;Lod set to drain, a good poLZion of <br />the original disturbed area already has 1-2 years vegecLtivc growth on it. <br />8 <br />~Colotvyu .S.tlimrnc.tinn R,nd Tt~rC'ocr~irrxct Muting Nntn Prrp~nd (ry: KCfC <br />D:189(\uAporitLrnrt Page l <br />