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<br />G.E.C. MINERALS INC.
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<br />MINE SITE, FLORENCE, COLORADO
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<br />j HYDROLOGY
<br />(� MAP THREE
<br />,
<br />x TIPPLE 'IN G -' °
<br />, t i
<br />Q�'3 r 1 fi r� POST —
<br />1I o f . ,. s� , r M I N I N G
<br />a
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<br />CONDITION
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<br />1 / blpp X 03.4
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<br />X982
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<br />_EGEND .
<br />x 6 o PERMIT BOUNDARY
<br />-
<br />\ DRAINAGE AREA BOUNDARY
<br />oil
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<br />X69.0. / �
<br />SUBWATERSHED BOUNDARY
<br />I I.
<br />- : ' . r �., ' t; i ► iii
<br />o , 7 / rIII 1 I 4� SUBWATERSHED CHANNEL UNIT
<br />SW -6 SUBWATERSHED UNIT SIX
<br />•,�,,,_ V X29. 1 `�� s2. (`• I/ r .° �� �a + -9 SUBWATERSHED PLAIN UNIT NINE
<br />PL
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<br />CH —4 SUBWATERSHED CHANNEL UNIT FOUR
<br />CULVERT
<br />.•� , x ( — - !' \ �' INTERNAL DRAINAGE AND DEPRESSION
<br />xo \ ^ 'P STORAGE OUTSIDE GEC PERM IT
<br />a-
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<br />AREA (DORCHESTER AREA)
<br />toottoo . � � c
<br />` i � m D DRAINAGE
<br />` DUE TO PRESENT AND PA T MINING
<br />OPERATIONS
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<br />SCALE 1 = 200'
<br />e `: / _ i / I I I ; j. i 200 0 200 400 600
<br />> /A�7i / /
<br />J T
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<br />. CONTOUR INTERVAL
<br />c) I t !I t g FEET
<br />+c- \ 1 + x27.5 ,1 / ,. I � / t f •. - - "" __ s — 1, :
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<br />OF
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<br />I I NOTESt
<br />"• I. The designation PM In front of a subwatershed unit
<br />27
<br />designation means that the subwotershed geometry and /or
<br />j // I t� •• < ,\ • _ � 07.7 � X s - / �
<br />jQ / 1 r r / j f l / / drainage parameters changed for the Post - Mining Con
<br />dition. Those subwatershed units which do not have the PM
<br />/ designation remained the some as they were for the Pre -
<br />Mining Condition.
<br />/ [
<br />qb I \ I x937
<br />� I / - 1 :h ' .• / i 1 b r0 2. These culverts are recommended for the Post - Mining Con-
<br />dition. The reason for these two culverts is discussed -
<br />{ •• as.5• 6, % �/ / in detail in the MULTSED data report chapter 5.
<br />' I � � � -,/ •iii' i` :• � ••• // , /
<br />3 .The location of Magpie Creek Channel for the Post
<br />/
<br />Mining Condition is based on the Magpie Creek Diversion
<br />i Channel within Dorchester's Permit Boundary being a
<br />x permanent diversion.
<br />� ` I 13.6 ........... .. ..l .
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<br />•
<br />I
<br />I
<br />hydrologic balance and stability
<br />I 1 / . - ... ..... .._ .... .. :••�• : :::::'..: ::':: ;:.:.• � 4.Of major concern for the Y
<br />............
<br />laimotion
<br />_ - .. I - • : a I ': •: " '•• : ' :.•• • ....•:: of some reclaimed areas is timing and rec
<br />a.. ...::.. ..
<br />/ plan of Dorchester. A detailed discussion on this
<br />iiE ci ii chapter ............. ..
<br />e' : ... ..... •.••, (�a, ) F ,. •, i "' I' or13o is given in the MULTSED data report p 5.
<br />1 / ••
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<br />"" ••• •••••••••�• •• .....��G:�li:.... r 5. For - continuation of subwatershed bound aries outside
<br />�\ � :•:r • :r.�,,......... ,.1.. ,..... :: a /
<br />y / � ,, .... .. ........... ...... ............,........ : :' : : :`• l of the permit boundary see Hydrology Map One.
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