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1 DAM NAME: San Luis Tailing Dam DATE OF REPORT: 08 25 20 <br /> TAILING DAM INSPECTION FORM <br /> Name of Professional Conducting Inspection: Colorado P.E.License No.: <br /> Debora J.Miller,Ph.D.,P.E. 25018 <br /> Company Name and Address: Phone No.: (970)581-8988(M) <br /> Miller Geotechnical Consultants,Inc. <br /> 2837 Skimmerhorn Street <br /> Fort Collins,CO 80526 email: Deb.Miller@mgcgeo.com <br /> INSPECTION PREPARATION: I have reviewed all pertinent technical documentation related to this dam and site in the Owner's files: <br /> 0 Yes ❑ No Comment: <br /> ' STATEMENT OF EXPERIENCE: I am experienced in the technical disciplines necessary to properly inspect this dam and appurtenant works, <br /> including civil and geotechnical engineering. <br /> 0 Yes ❑No Comment: <br /> ' YR COMPL 1990-91 Ph I T/R/Section COUNTY DATE OF INSPECTION: 08/25/20 <br /> 1993 Ph II Raise 1 Not Applicable/ COstilla <br /> 1995 Ph II Raise 2 Sangre de Cristo Land Grant <br /> DAM HEIGHT(FT) DAM LENGTH(FT) CREST WIDTH(FT) PREVIOUS INSPECTION: <br /> 155 1,900 25 06/04/19 <br /> FREEBOARD(FT) DRAINAGE AREA(AC) CREST ELEV(FT) MAX.STORAGE(AF) MAX.SURFACE AREA(AC) <br /> ±12 741 total;537 diverted +8620 1105(at dam crest) 136.7(at dam crest) <br /> ' BEACH LENGTH ABOVE POOL(FT): FT DIVERSION CHANNEL CAPACITY(CFS): <br /> OWNER: OWNER REPRESENTATIVE/CONTACT: <br /> Battle Mountain Resources,Inc. David Carino <br /> OWNER ADDRESS: OWNER CONTACT PHONE NOS.: <br /> P.O.Box 310,San Luis,CO 81152 719-379-0827 siteplant) <br /> FIELD CONDITIONS WATER LEVEL BELOW DAM CREST: ±12 FT <br /> OBSERVED GROUND MOISTURE CONDITION: 0 DRY ❑WET ❑SNOW COVER ❑OTHER <br /> Directions: Mark an ✓ for conditions found and underline words that apply <br /> UPSTREAM SLOPE AND BEACH AREA <br /> PROBLEMS NOTED: 0(0)NONE ❑(1)EROSION PROTECTION-Missing,Sparse ❑(2)BEACH AREA WAVE EROSION <br /> ❑(3)CRACKS WITH DISPLACEMENT ❑(4)SINKHOLE ❑(5)APPEARS TOO STEEP <br /> ❑(6)DEPRESSIONS OR BULGES ❑(7)SLIDES ❑(8)ANIMAL BURROWS <br /> ❑(9)OTHER: <br /> CONDITIONS OBSERVED: 0 GOOD ❑ACCEPTABLE ❑POOR <br /> ' CREST <br /> PROBLEMS NOTED: 0(10)NONE ❑(11)RUTS OR PUDDLES ❑(12)EROSION <br /> ❑(13)CRACKS WITH DISPLACEMENT ❑(14)SINKHOLES ❑(15)NOT WIDE ENOUGH <br /> ❑(16)LOW AREA ❑(17)MISALIGNMENT ❑(18)IMPROPER SURFACE DRAINAGE <br /> ❑(19)OTHER <br /> CONDITIONS OBSERVED: 0 GOOD ❑ACCEPTABLE ❑ POOR <br /> DOWNSTREAM SLOPE <br /> PROBLEMS NOTED: ❑(20)NONE 0(21)LIVESTOCK DAMAGE ❑(22)EROSION OR GULLIES <br /> ' ❑(23)CRACKS WITH DISPLACEMENT ❑(24)SINKHOLE ❑(25)APPEARS TOO STEEP <br /> ❑(26)DEPRESSIONS OR BULGES ❑(27)SLIDES ❑(28)SOFT AREAS <br /> 0(29)OTHER: Minor gullying and rilling. <br /> CONDITIONS OBSERVED: 0 GOOD ❑ACCEPTABLE ❑POOR <br /> Cattle activity in the toe drain area has disturbed the ground surrounding the pipes,but does not appear to have caused major damage to the pipes. <br /> 1 Page 1 of 4 <br />