|
DEPAh_;`�,/l ENT OF 1%A 1_OF? �L OUR CE73
<br /> dD P,%(_.r;ir-r. , r
<br /> -) RIV, "ATMt-11' DIVISION
<br /> IM!N E D L A N L
<br /> DAVID C. S;-iELTON Di:,ec!or
<br /> .,.IF-rch 17, 1982
<br /> TO: Jir,-,
<br /> FPOII: Dave Cray.g
<br /> P2 Mid'-Continent Ground :,'_,L_er !"i-no-ings
<br /> Coal La sin 11ines
<br /> I. DescriPton of Eylsting Environment
<br /> Ground water occurs in both bcr!rocj, anr! alluvial -i,-fuifers in the vicinity o'L7 the
<br /> 1,:id-Continent mining operations., 13edrock strata r,.,hich have the Pc tential to be
<br /> labeled aquifers are t'-e Upoer Sandsto the Sadns-one and the
<br /> Sandstone, all of the ?Mesa Verde Group "see _figure of the permit application) .
<br /> The alluvial deposits of Coal Creep also can be .2--I)e1erl a7-, aquifer. The Gnly known
<br /> users of grcLmd ,,7ate-z in Coal p,,_-sin have all coro;leted 1s in the all v-al
<br /> arfuifer of Coal Cree!. (see T,�:_ble =_T-C-3 of the
<br /> J rma Yca-ci on) . The-e are
<br /> no known uses of -bal-"roc.' gl"GL:i 7 ;..7ater fron the Nesa Verde Grou, _.-2 the ,-' -'n 4 ty
<br /> -
<br /> of the mine. Many of the other strata c re wate,_bearing, bat uield, J n s u7 f:-i ci en t
<br /> (-u,_-2nt_-"ties of w' 7zter to be labeled aaui-Cors.
<br /> As stated ea--lier, 3 sandstone writs in the Mesa Verde Cr_um have the- not_ntial
<br /> to be labeled aqui-fe-,s. _T!, Coal Ba:7in affecccr2 are-, t2--e Un-oc S,:JnsL:one is
<br /> ap i -pzoximato_..�,, 50 feet thick, the Middle Sandstone is abo,_,t- 120 feL2E: chick, and
<br /> the Rollins Sandstone is about 740 feet thick. To better understand the
<br /> strazzigraphic relationships between these sandstones and the coal seams being
<br /> rrined, see Figu--,-e -T-T-D-1 of the ,perr-,it application. Generally, the Rolli=
<br /> and-
<br /> scone u7i-:derlies the "B" seam and the Widdle Sandstone immediately
<br /> underlies t "V" seam. Z11 of these sandstone units outcrop on the eastern wall
<br /> Of Coal Basin (See ,!a_o of the oerrrzit applicat.Ion) . This is where recharge
<br /> to t.,o aquifers rrobab-7y occur. From the outcrop, the sandstones (.fio to the 'vest
<br /> under Huntsiran Ridac, and eventually, deep under the Piceance Basin. On the
<br /> weste-m side of Huntsman Ridcrc, the sandstones are located about 2000-31000 feet
<br /> beneath the surface (see Plato 11- of t,,i2 oe_,-mit al,,,T)lication) . There are no known
<br /> users of this ground water z)riir,arily because of this great --,Ie'Dth. The water yields
<br /> that could be e.,,.,pected froT1 these sandstones arc too small to justify the great
<br /> cost of dr17 "incIr to this ne.DC). Also, because of this reat C,,O_pth, nc, site-
<br /> speci.-Ic data has been collect-"r7 regarding t!-fie huYrau7Jc- c'-aracte.-,_-1'stics- o. -,rate
<br /> quality of cheso poLnL'_-'a1 attar tots. Hoilever, the -tpT)licant estimate; th_,t
<br /> r -in Llie san(!_, tono cr faifer:-, ran(To c).- -2 t,-) 0ot )c,!-
<br /> transrniss_-7v_:,`ties ranaing from 0.5 to 150 Ft2 Der d3u. During a USES s="_Y,
<br /> one i.;-as locatecZ in the n.Iesa Verde Croup in the vicinity of the rune. It is
<br /> not kno-m sInDcifically what stratigraphIc unit this !,.,ell = Cor-,p7eted 1r. H o,,.,e ve r
<br /> tl.a c,,,ater q !rility of this v,-cZ1 �-,,as reported to be Ca7CJ*Up- bicarbor.,,ate tape a
<br /> total dissol,,ed solids concentration of 131 mg/I.
<br /> 313 St.er i z.,:c e t `3 20 3 Tel.1. C-0 7
<br />
|