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GENERAL33949
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GENERAL33949
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Last modified
8/24/2016 7:55:40 PM
Creation date
11/23/2007 7:46:44 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981037
IBM Index Class Name
General Documents
Doc Name
PRELIMINARY ADEQUACY REVIEW COMPUTATION GEC STRIP MINE C-037-81
Permit Index Doc Type
GENERAL CORRESPONDENCE
Media Type
D
Archive
No
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nDr:rnlncY tli.h l r,tv <br />GfiC "lincrals, loc. <br /> <br />December 12, 1980 <br />710.12. Reclamation of this "prospecting" pit is required by the <br />~ laws of the State of Colorado, lxemptions providcrt by <br />federal statues are not relevant (707..1?(b)( ), (h)(5) <br />and (g)(2)). Ply readinP. of Section SO?(c) of PI, 95-R7, <br />91 Stat. ~C,9 leads me to Itclicvc that any exemptions <br />granted under this statute exnirecl on ,January 1, 1979. <br />715,13 Post-mining band Ilse; In order that the disturbed area <br />may be reclaimed in a timely manner, a specific schedule <br />of reclamation activities must, he included in the appli- <br />cation. Thn proposed most-mining, land use must be <br />specified and compared with pre-mining uses. <br />715,14 Ilackfil.linr and grading; A post-mining„topography map <br />and cross-sections arc required (scale 1" = 50' apnroxi- <br />mate]y). "+y estimation is Mat the volume of material <br />required to hack('il.l the "prospecting" nit is closer to <br />lOp,000 loose cubic yards (1,(:Y) than the 87,000 LCY you <br />propose. <br />Tt t•"ould appear that l~-1G,nnn I,CY n( the fill materials <br />proposed for use under hackfill option (,t) was generated <br />by the excavation of t. tic Orphan Pit; a cotnnlctc material <br />balance calculation must therefore he presented to demon- <br />strate t.ltat the reclamation nl:stts for outer disturbed <br />areas arc not jeopardized. <br />The nature (physical and chemical) and source of all <br />possible fill materials must he listed and quanti~d; the <br />source of these materials must he identified on a man .and <br />its origin clescrihed (i.e. ltow is "tipple waste rock" <br />separated from coal?) <br />The plan makes reference to a "high speed hackfill stage" <br />in backf.ill option (b); this reference is unclear and the <br />concept must he defined. <br />715.14 (b) final Graded Slopes: A Host-minin,r, topography map (l" <br />50') and CYO55-SCCt10nA must he submitted to show that <br />the reclaimed surface will approximate the original (i.c. <br />pre-mining) slol,es and morpltolory. The topographic contour <br />interval must be small enough that the surface drainage <br />patterns are clearly delineated. <br />r' <br />
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