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11111111111 <br /> �- 999 <br /> San Juan County Mining Dntum <br /> Sunnyside Mine <br /> Washington Mining Co. - Operator -71- °l <br /> P. 177 <br /> Silvertonton, COC 81433 <br /> (Ph. 303-387-5533 FAX 387-5310) <br /> ^ctol,er 27, 1989 RECEIVED <br /> 4 V 11989 <br /> "Ir . John Doerfer MINED LAND <br /> Recla7,,ation Spec i a l i s t RECLAMATION r31VIS1®N <br /> �1ine:] ra;;cl Recl'a:iation Division �0 <br /> Colorado Department oG Hatura,l Resources <br /> 215 Centenn4 ,7l Building <br /> 1313 Sherman Street <br /> Denver , Colorado ti 0203 <br /> Re: Sunnysicle Mine, rile No. 11-77-378 <br /> Deer John : <br /> Enclosed is a Technical Revision for the improvement- of our <br /> American Tunnel settlinc: pond piping systen. This chance wi11 <br /> simplify the o perati on of the discharge 7 .ter_ treatment and <br /> 2os3ibly i. ,1Drove the quality of dater discharged . <br /> The proposed piping changes '.o not affect the permit mining plan <br /> or reclamation Man and do not clisturb additional acreage. The <br /> ,,Urpose of trio changes i to improve the quality of water_ <br /> oischarc,e<: by (1) increa,,; ng the retention ti,-ne �ruririg pnnrl <br /> cleaning operations and (2) el ixi hating snort-circuiting , ch <br /> will increase retention time. <br /> Only the launderer (gated pine) will be installed thir Tear on <br /> Pond $1 . The rest of the L)roj<--ct will be constructer) next sum:�er <br /> if the treatment nee„s of the caater have not chan(jed clue to the <br /> new hiomonitoring provision of our NPDES permit. Tt is possible <br /> that a :iiore soP�hi ticated syste,r. ,right be require(l . In that <br /> case, the t)ipit;, sy;7ti?..i project will be scrapped In favor of <br /> other improvements . <br /> Sincerely, <br /> Larry Perino <br /> Superintendent - Technical Services <br /> LP:mkr <br /> Enclosure <br />