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from CBA-2 to the top of the refuse area. Tlus is a long haul, with a steep segment from Ute main road
<br />along Coal Creek up to the top of the pile.
<br />Task 016. The initial volume of 74,536 cy is exvemely conservative. It assumes Ute required l8" of cover
<br />(subsoil) over the enure CRDA-2 disturbed area, rather titan replacement of subsoil overjust Ute remaining
<br />bare refuse. Actual volume required, and available, is 42,100 cy; which would include 8,571 ry from
<br />TS#3, 5,600 cy from TSk8, 25,300 cy from CBA-2, and 2,629 cy from Ute Coal Creek Diversion. The
<br />extremely conservative volume projection for Task 016 ma}' in effect compensate for Ute dilTicult salvage
<br />conditions associated with Ute extremely rocky soils in bortow area CBA-2 as descnbed above. If the
<br />material volumes are reduced to reFlecl actual conditions, the assmnptions regarding salvage and haulage
<br />meUtods and production may need to be re-assessed, as described for Task O I5. Soil from all of the
<br />stockpiles and the bortow area would need to be hauled up Ute steep CRDA-2 temporary road to Ute top of
<br />the pile for distribution on the slopes and top of Ute pile.
<br />Ripping Task 018 and Task 070. 1 am not sure why Utese are presented as tvvo separate tasks, although it
<br />appears that 018 assumes deeper ripping titan 070, hence the luglter job cost. Maybe 018 ripping applies in
<br />heavily compacted areas receiving minimal fill. The task sheets for each item reference Exhibit 6a as
<br />"source of quantity takeoff". This is confusing, because Exhibit 6A is Ute South Portal Facilities map,
<br />which is only one portion of the acreage to be graded, and presumably ripped. The asswnptions for these
<br />ripping tasks need to be more clearly identified. On page 14-14 of Ute reclamation plan, it is stated Utal
<br />"prior to topsoil redistribution the top four to six inches of the regraded surface will be scarified to
<br />eliminate slippage stu{aces, relieve compaction, and provide for root penetration." Tltis would likely
<br />cortespond to the shallow ripping projected in Task 070. On steep slope areas such as the refuse outslopes,
<br />this operation would probably require Ute use of a small dozer, operated by a highly skilled, very bold
<br />operator. Production on such sites would be lowered by the probable need far use of Ute blade to maintain
<br />stabilit}• on Ute slope, according to Renner.
<br />Tasks 034 Uvough 036. These tasks address salvage and transport of soil material from Ute borrow area
<br />above the South Portal area, for use in reclamation of the RSRDA. The volumes and haul distances appear
<br />to be in accord with projections and locations presented in TR-35. It is probably unlikely that scrapers
<br />could be used though, given Ute tight quarters and large rocks likely present in Ute borrow area soils.
<br />Task 04 L OK. Initial volume of 24,400 ry compares closely to my projection of 22,829 ry. OUter
<br />assumptions appear reasonable.
<br />Task 042. OK, moderately conservative. Initial volume of 16,430 cY compares [o my projection of 13,500
<br />ey.
<br />Task 047. Assumptions of this item are erroneous, for a couple reasons. The item implies Utat all soil for
<br />use as [opdressing on CRDA-2 would come from Stockpile 7, and Utat 8000 ry would be used. In reality,
<br />16,900 ry would be needed for CRDA-2 topdressing, only an insignificant fraction of which is available in
<br />Stockpile 7. The necessary volume could be obtained from Stockpile 2 (14,300 cy) and Stockpiles 7 and 9
<br />combined (2,600 ry). Task item volume and Itaul distance assumptions should be adjusted accordingly.
<br />Task 065. The broadcast seeding task which would primarily be applied on slopes of 2.5:1 or steeper
<br />includes chisel plowing as a seedbed preparation tillage operation. 'T'his method is not specified in Ute
<br />reclamation plan, and would likel}• not be practical or effective on Ute steep slopes. The penni[ does
<br />reference "dozer tracking up and down Ute slopes" as a seedbed preparation treatment, and Utis tneUtod
<br />should be included in task, rotifer titan chisel plowing. See furUter discussion regarding steep slope
<br />roughening, under Reclamation Tasks Not Reouired by Current Aooroved Reclamation Plan, below.
<br />Task 090. Steve Renner expressed concern Utat structural demolition costs may be higher titan projected,
<br />based on his experiences at Coal Basin. I'm not qualified to offer an opinion. I agree tviUt Steve's
<br />assessment that demolition of the suspended conveyor structure Utat spans Ute Colorado River appears to be
<br />a formidable project. I'm not sure exactly Itoty it would be accoinplislted. The cost projected Cor Utis task
<br />is approximately S 14,000.00, which seems pretty low. Amore detailed assessment may be vvananted.
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