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It: is ODUCTIO!: <br />This renort :•:as crepared at the request of ~erg::son Engineers of <br />Durango, Colorado. ^.e purpose of t;~e investigation and report Ss to de- <br />terrine the effects o: unierErocrd mininf. on Eround :rater at the Peacock <br />Coal i•:ine, The mire is located ;n a portion of Section 29, T35!J, P.11:J, <br />I:.I:.°.t:., la °lata Count;-, ;,olora'o. ^.he investigation included a field <br />exa:.ination, a rev'_ew of all aca:labla geologic and h;•~oCeoloic litera- <br />Lure and Baps. <br />CCIICLUS IQ]'S <br />1) Proposed underground mining at the PeacocY. Coal 1:ine will have no effect <br />on water «ith'_n tie acuifers of the F:esa Verde Crop nor on 'pater within <br />the Hay Cinch alluvial valley fill. This incl•,ides all surface and subsurface <br />waters :•:it!:in and adjacent to the area of investigation. <br />2)•The proposed rt'_n_nE area lies stratigraphicall^ above the aquifers of Lhe <br />1•:esa Verde Croup and verticall}• r+l~ove the piezonetric surface of the Ilay <br />Gulch drainage. <br />3) The mining area .s breapl:ed c;: erosion both up and do~r.+ dip. <br />4) Surface runoff through and fro-, the mlred area r,ili be treated in pro- <br />posed sedi:r,entatior. coeds to rrevcnt eontamination o: tF.e i::tv ;,inch drain- <br />age, <br />5) Shales within the lo:•rer l~:enefee : orrtntion sha;:id orei•en: do:rnward perco- <br />lation of :rater into underl:.•ing aquifers. <br />5) :, scarc!i of t!+e r.^.coeds of th^ Colorado Division of '.rater p•.esources in- <br />dicates no water wells updip (north) of the proposed ripe area which would <br />be affected by rtini~g. :~dditior.all;•, the erosio-al bread. updip ::ould pre- <br />vent any• e:fec;, on ad,~acent wells. <br />(1) <br />