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Exhibit 71 Hydrologic Characterization Sw[h of [he Divide Area and Monitoring Plan 30 <br />Table 9 <br />• Summary of the Ground Water Monitoring Plan <br /> <br /> <br />Monitored Station Monitored Area Water l-evtl <br />Measurement Field WQ <br />(pH, coed, temp) <br />Aeuusl Lab Water Quality <br />P<riad o(Record '. <br />Foci[' Areo A'effs ond A(Wvial A'eAs <br />P-3 MW-8 Mine facili area 3 x Year 3xYeaz Low Flow Period f~ 1985 to resent j <br />P-4 MW-9 Mine facili area 3 x Year 3 x Year Low Flow Period m 1985 to resent <br />P-6 Mine facili area 3 x Year 3xYeaz Low Flow Pttiod t'~ 1997 [o resent <br />P-7 Mine facili area 3 x Year 3 x Year Law Flow Period ni 1997 to resent <br />E-1 Mine facili area 3xYeaz 3 x Year Low Flow Period of 1996 to resent <br />E-7 Mine facili area 3 x Year 3 x Year Low Flow Period r0 1999 to resent <br />er D Fork Alluvial f r SOD azea 3 x Year 3 x Year Low Flow Period n> 10/03 to resent <br />ower b Fork Alluvial t't SOD azea 3 x Year 3 x Year Low Flow Period rr~ 10/03 to resent <br />A'ells co ete d is 11u Barrea Member above FSeam <br />SOM-80 NE mine anels 3 x Year 3 x Year Low Flow Period t'r 1979 to resent <br />OM-13 Down adient ofNE mine anels 3 x Year 3 x Year Low Flow Period f ~ 1979 to resent <br />OM-45-H1 SE mine anels 1979 to 2005 <br />OM-45-H2 SE mine anels 3 x Year 3 x Year Low Flow Period ~~~ 1979 to resent <br />OM-23-H-4 SOD area 3 x Year 3xYeaz Low Flow Period at 2005 to resent <br />Wells co leredin Me FSeam <br />OM-2-H SE mine anels 1981 to 2005 <br />OM-16-H SE mine anels 1981 to 2005 <br />OM-C-76 SOD azea 3 x Year 3xYeaz Low Flow Period o) 1978 to resent <br />OM-23-H-3 SOD area 3 x Year 3 x Year Low Flow Period ~'~ 200$ to resent <br />Welk co INedin theESeam <br />6-27-1 Box Can on mine anels 1996 [0 2005 <br /> <br />3-1 I-1 Down gradirn[ of W. Flatiron and <br />Box Can on anels <br />3 x Year <br />3 x Year <br />Law Flow Period a> <br />10/03 to resent <br /> <br />OM-3E Up gradient of Box Canyon mine <br />anels and SOD area <br />3 x Year <br />3 x Year <br />Low Flow Period "~ <br />10/03 [o resent <br />OM-23-H-2 SOD area 3 x Year 3 x Year Low Flow Period Pt 2005 to resent <br />Well s co leted above theESeam <br />6-2-2 East and up gradient oFSOD area 3 x Year 3 x Year Low Flow Pttiod n~ 1996 to resent <br /> WeILr co lered in B Seam <br />OM-129-H Down diem of NE mine anels 3xYeac 3xYeaz Low Flow Period rr~ 1993 to resent <br /> <br />o. W-1 Up gmdient of SE mine panels and <br />SOD azea <br />1996 to 2005 <br />V-46 Box Can on mine anels 3xYeaz 3 x Year Low Flow Pttiod or 1995 to resent <br />1-11.1 Down diem of W. Flatiron area 3 x Year 3 x Year Low Flow Period o> 2001 to resent <br /> <br />OM-3B Up gradient ofBox Carryon mine <br />anels and SOD area <br />3 x Year <br />3 x Year <br />Low Flow Period r'~ <br />10/03 to resent <br />OM-23-H-1 nl SOD azea 2005 sus ect data <br />1) For sites with>5 years of data, lab parameters include TSS, TDS, Cond., pH, and Fe (diss & tot). <br />2) For sites with <5 years data, see Table 6 <br />Shaded items - WeIIs taken out of monitoring plan because of casing has collapsed <br />5.0 CONCLUSIONS <br />The hydrologic monitoring plan presented in this document is based on the best available information and <br />• data regarding MCC mining plans and schedules. The hydrologic monitoring plan will provide the <br />foundation for monitoring potential mining-induced hydrologic impacts from MCC's current and future <br />April 2006 HydroGeo, lnc <br />