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• . <br /> ; ; <br />. <br /> . ; . <br />' „~,,.Lnc r•.. LnucrruN ~ :•; RIGHT-..lc Ll:UGHLI!'! IE i'IGINCERS '. <br />weV'+r.+'1 ': v.~UGnr <br />' <br />CNGINFCOING CON50I_T AN i': <br />n F. Cn KH$Ora <br />HI11 U'' <br />' OOVi.Ip'~r 50vCHn ¢a_O.[LCOIT SiHrEf <br />Y ['•LO Nf ~ <br />)OH <br />( - - .. OINV FIt. CULUNwLU flOa11 ' <br />=- <br />'~ ' 1]O)1 H]B~6a01 <br />THONi'i\\ L•ONNIS • Orr <br />C[ <br />art <br />' <br />r <br />4MHIC0 \. ri~I F+F LO [ IRO <br />• <br />o won re <br />• <br />I <br /> r 4lwOa. coLONwoo wrb <br />wtr[b. cn[ouwnOnm fl G.•[nn[ <br /> Piovember 7, 1975 <br />;: ~~~ P1r. Ralph Tibble <br />Homes take Ftining Co,,,pany <br />215 West Nain <br />Lead, South Dakota 57754 <br />~. Gentlemen: <br />i <br />wr.n'u:rc u+unCrHlvE. srn•ncr ; <br />+n TrE xr[nwLTT rILLU`. or <br />\'rPlr.P $\H'1'LY PnU IH'iI NIFUT~UN <br />wnn.n wNn ;1.+v P.:[ n,rn THn:nr <br />' Sr\V pGI COLLCCTICN .\nU nl'U>E ' <br />INnUiTHInL VI?i!F`i i <br />~' iTORMnH41NPOA ~ , <br />FLOODCOHTHOL 4n0 <br />OTNln WPTCH~OH H.NTEO PHOICCTS <br />F1r. Al Winters, Manager <br />Bulldog Mountain Hine <br />Creede, Colorado. 81130 <br />In accorGance with your request that :ve review and study the pollutional <br />aspects of the Bulldog Mountain Mine drainage water, and prepare reco:rrnenda- <br />tions related to pollutional treatment of the drainage water, ire submit the <br />attached report. The report is entitled "k'ater- Quality Aspects of lJillogr <br />Creek and Bulldog Mountain Hine, Creede, Colorado." <br />An important aspect of our study and analysis was the collection of water <br />~• quality data for the mine drainage water at several points in the Willogr <br />Creek Basin. This field data collected during the spring of 1$75 has been <br />correlated with significant other data t~rhich has been collected by various <br />agencies since 1966, and overall, this water quality data provides a good <br />basis for deFininy tha problems and outling alternative water quality im- <br />provernent measures. . <br />An important aspect o` our effort has been to define the conceptual feasi- <br />bility of stream basin solutions for 4lilloar Creek. As you knot, 4filloar <br />Creek represents one of the State of Colorado's difficult water quality <br />proSiems, ancf as a result, it is currently unclassified by the Water Quality <br />Control Commission. ' <br />~• <br />Tlie significance of a stream basin solution relates to the fact that tl:e over- <br />all 4lillow Creek basin is a problem in terms of toxic pollutants. Zinc has <br />been singled out as the most important parameter, During the 1975 sampling <br />program, the Bulldog Mountain Mine drainage water contributed i to 13 percent <br />to the surface water zinc loading in Willow Creek. There teas evidence of <br />significant' ground water contarrrination in lower 1•lillow Creek. Since ground <br />g:aier samples were not ta'ren, it was not possible to determine the relative <br />contribution of this source. If ibis source grere taken into consideration, <br />the Bulldog Iountain Nir,e percenlagr_ contribution grould be less. TreaUaent <br />of the Bulldog Fountain Fiine water grould not permit 4lillot~ Creak to sustain <br />any type of fish life, and iC would continue to be unsuitable as irritation <br />grater. if the treated water were to be discharged to 4lillow Creek, it grould <br />be recontaminated prior to joining the Rio Grande and o-rould nut lessen the <br />overall pollutant impact on the Rio Grande to a major degree. <br />- .. .. -_.. - 157 - <br />