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BRUCE FLOROUI8T, P.E. - ENGINEERING GEOLOGIST <br />77697 U.S. Y.IGHWAY 550, MONTROSE, CO 87407 <br />• 303449-4 7 42 <br />INTRODfJCTION: <br />The purpose of this report is to present the ,,rcliminary <br />analyses of the geologic and geotechnical characteristics of the <br />prop~.•.-- spoil disposal area, The area under investiyation is <br />directly across the Harvey Gap drainage from the East Side Coal <br />Mine and will recieve spoil from that mine. The information <br />contained in this report presents the results of field <br />investiy.~cions to date by the principal investigator, Bruce <br />F'lorquist as well as the geotechnica.i services performed by <br />Camber,. and Associates. <br />SITE CHARACTERISTICS: <br />As mentioned above, the subject site ]~~~s across the valley <br />from the East Side Coal Mine and about 500'downstream from the <br />Grasp Valley Reservoir (sometimes ca-led Harvey Gap Reservoir). <br />The .,,te consists of a relatively small east-west trending valley <br />that drains to the larger Harvey Gap Drainage immediately to the <br />east of the site. It is bounded on the East by a canal (outlet <br />'or Grass Valley Reservoir and on the north and south by steeply <br />• ~9ipping sandstone outcrops of the Mesa Verde ycoup. ine site is <br />covered witl tall sage and ~~raases and is rimmed with Utah <br />Juniper and Pinon Pine The valley had been the location of a <br />tipple for a mine that was abandoned in the 1950's- The tipple <br />has since been removed and there is no siyn of any struct.t-es on <br />the site. There are some areas of wasted coal and spoil <br />scattered about, but these are less than 3 feet thick 1 will be <br />removed when the site is prepared for the spoil from he East <br />Side Mine. The oJ.d coal mine lies in the next val]„y to the <br />north and poses no hazards to the proposed faci.tity as the <br />e.bandoned mine reportedly went into the coal sPnm alon,i .trike <br />and the coal was teen mined. from the "back". There is no <br />,. vid n.:e that the s.••r was ever mined drnandip. <br />SURCA~'I: AND SUDSURFACE DRAINAGE: <br />The sire con:~sts of a very short „].ley that drain,: from <br />the h+oher hills to the west. Site inspection :owed that there <br />were no springs, seeps or ponded water in the vicinity of the <br />site. P can be seen from the test drilling no ground ~.Jater was <br />encounte d in any of the test holes. The testing was done soon <br />after the last snow melt and within a fert days after a relatively <br />heavy rain. The fact that no evidence of group. water cr recent <br />surf,.ce water movement could be seen is a fair indication thu <br />• this site should not be subject to ground water or :surface water <br />problems. As mentioned earlier, the canal for the outlet of .ie <br />Grasp Valley Rescrvoi.r forms the eastern boundary of the area, <br />but this canal is sufficiently removed from the spot: dispor.vl <br />site (horizontally anc•. vertically) so teat it should pose no <br />problems to subsurface incursion of water below the spoil pile. <br />The natural drainage from this canal is 'o the east, away from <br />the proposed spoil pile. <br />