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1°6 QL' PLl" OF THE COLOEL~DO SCISOOL OF ~IL~"E side of Logan \\`:uh about a quarter mile beloss' the head, are shrnsn in figrue 3. On the losscr lesel u a ross~ cf of0icc antl personnel trailers. \\'c mosed several thousand tons of moot; to deselop th~5e platforms and the ceRical face to mine into. \Verk startrd in mid-19.g on the lower level and a fesv months later on the upper Icsel. \(ining has progressed nusv into room 4, the first comnu•rci,rl room, and sec sill start burning it this summer. Equipment aas in short supple in 191, and see had to improsisc, \ c obtained an [ngersul-Rand hso-boom ju:nUo built Eur use m a much smaller mine. \\rz rock the boons off. put :ur rstrnsicn on to race it 6 feet, recondi- tioned the jumbo and are using it un both levels. \1'z no« hale an .\tlas- Copco hcin boom, electric hydraulic jumbo, exez!Icnt for drilling a '_7 Eo~t high Eace and capable of estcudina b drill a SO foot high face, sshirh sse need in certain avers. \Yc bought this jumbo off the floor at the American Mining Congress in Las \'eg:u. It ii r.c[ full rotan~, but is a vast improve- ment user the jumbo raed initialh. \\e have consistently drilled heading rounds 30 feet snide b}' 30 feet high sing 13-foot steel, pulling about 10 feet, in less than °'- hours, includin~ schip time. \Ve have another Atha Copco jumbo nn order. It will bz full rotan', and ne should base it by mid-197,1. With it, see eepect to drill the same size heading round in the same tune, except that it sill use about '_f-foot steel and pull about 40 feet. t\'e use a Cradall 1000 scaler to scale loose rock off the back and the ribs. \Ve haul muck with El\ICO 9305 with a 10-}ear bucket and CAT ~ ,s 1 t '.. Freuns 2.-Comm~rcitl mine portals, Occidennl Oil Shale, Inc ~~~ ~- . . - - _ _. Ste[: T',1:,~ J _ _ !." • SITU OIL SFL\LE PQOCESS DE\ELOP?rG\T ~ 1~~ 9SSs front-end loaders. \Fc hasz devzlopzd a Emr amount of availability and experience data kith both. Underground mining is prcacding routinclc. Bc [he end of 10~.i'.vc will h.nc imcstcd ~omcu~Scrc in the nrighber~ heed of 5?.5 milLcn in cur oil shale' cork. Anodicr area to be murtioncd a cue cmironmental work. \Ce ha~c devzlop~d a lot cf about 1S actisitic; uherc ensircnmental effect, sod pemiU must be eciuidzrcd. All ens ircnnrental requirements mrat be met. Tu our thinkin^, most arc Ic^i[iur.rtc, thcuch .,nine are not. At thi; tine last year ue had hehvzcn _i .uid :;i permit; r~scring cur operation. \\c hale risen up counting Hess bu, h.ise a tca;n uE,esen pttmlz ~pcndin; about 90 percent eE is time in the rnciicunicntal area des elupin^ the im fomuticn necessan~ to obLrin pemriG needed nose or in the frrh;re. R~e hasz a ~ cat deal of encircnmcntsl bacline data garb^ring undernav, in- cluding a meteurclo,ical study, fauna and Hera studies, and other,. \1'e have completed pa!r~cntclogical and arch. eolcgical studis. If ue are fully sans ied svit6 the results Frcm room ~, see will malt the decision to go into commercial produ;ticn. If see are not billy satisfied. we sill experiment with additional la,'gc rooms and perhaps mrre small rcons. Those of ra on the projst in Ccloiado anticipate a decision later tha year to go commercial ru the Logan \\'ash site. \(ore significant though, when ss~e make the decision to ,u mnumercial, it Hill bz on oil slra!e with a ~ ade roughly half of that considered nccessan for aboveground processing. The 300 foot thick seam that u'e are ssarking in assa}'s somewhere behseen 15 and IS gpt. \Ve are looking toscard making a commercial oil shale venhrre cn that seam. \Ve do not hale enough land to produce 100,000 b.rrrels per day, but ue see at least 50,000 barrels per da}' Eor l.i years. Much of thr rock that sue are usurp nose is not ore bs the conventional definit;en. In fact, it is not even resorucz. Orrr process is not selective. \\~e process the entire height of the seen selected. Ey taking the Eull hzight, we take a major percentage of the resource for recoven~. • • . _ ~ ~