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DAM NAME: San Luis Tailings Dam DATE OF REPORT:August 5,2022 <br /> TAILINGS DAM INSPECTION FORM <br /> Name of Professional Conducting Inspection: Colorado P.E.License No.: <br /> Mark S.Abshire,PE 33319 <br /> Company Name and Address: Phone Nos.: <br /> Engineering Analytics,Inc. 970-488-3111 (Office) <br /> 1600 Specht Point Road,Suite 209 970-692-4265 Cell <br /> Fort Collins,Colorado 80525 email: mabshire@enganalytics.com <br /> INSPECTION PREPARATION: I have reviewed all pertinent technical documentation related to this dam and site in the Owner's files: <br /> E Yes ❑ No Comment: <br /> STATEMENT OF EXPERIENCE: I am experienced in the technical disciplines or I am working with other professionals experienced in <br /> the technical disciplines to properly inspect this dam and appurtenant works.Technical disciplines in addition to general civil <br /> engineering may include geotechnical,geological,hydrologic,hydraulics,and structural <br /> EYes ❑ No Comment: <br /> YR COMPL T R Sec COUNTY DATE OF INSPECTION: <br /> 1993 Ph II,Raise 1 Not Applicable- Costilla June 14,2022 <br /> 1995 Ph ll,Raise 2 Sangre de Cristo Land Grant <br /> DAM HEIGHT(FT) DAM LENGTH(FT) CREST WIDTH(FT) PREVIOUS INSPECTION: <br /> 155 -1,900 -25 June 8,2021 <br /> FREEBOARD(FT) DRAINAGE AREA(AC) CREST ELEV(FT) NORMAL STORAGE(AF) POOL SURFACE AREA(AC) <br /> -12 741 total -8620 1,105 at dam crest 136.7 at dam crest <br /> 537 diverted <br /> BEACH LENGTH ABOVE POOL(FT): -600 DIVERSION CHANNEL CAPACITY(CFS): -1,500 <br /> OWNER: OWNER REPRESENTATIVE/CONTACT: <br /> Battle Mountain Resources,Inc. David Carino <br /> OWNER ADDRESS: OWNER CONTACT PHONE NOS.: <br /> P.O.Box 310 719-379-0827(water treatment plant) <br /> San Luis,Colorado 81152 <br /> FIELD CONDITIONS WATER LEVEL BELOW DAM CREST: 12+ F <br /> OBSERVED GROUND MOISTURE CONDITION: N DRY ❑WET ❑SNOWCOVER ❑ OTHER <br /> Directions: Mark and X for conditions found and underline words that apply <br /> UPSTREAM SLOPE AND IMPOUNDMENT AREA <br /> PROBLEMSNOTED: <br /> E(0)NONE ❑(1)EROSION PROTECTION-Missing/Sparse ❑(2)BEACH AREAWAVEEROSION <br /> ❑(3)CRACKSWITHDISPLACEMENT ❑(4)SINKHOLE ❑(5)APPEARS TOO STEEP <br /> ❑(6)DEPRESSIONS OR BULGES ❑(7)SLIDES ❑(8)ANIMAL BURROWS <br /> ❑(9)OTHER <br /> CONDITIONS OBSERVED: N GOOD ❑ACCEPTABLE ❑POOR <br /> CREST <br /> PROBLEMS NOTED: <br /> N(10)NONE ❑(11)RUTSOR 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: N GOOD ❑ACCEPTABLE ❑POOR <br /> DOWNSTREAM SLOPE <br /> PROBLEMS NOTED: <br /> E (20)NONE ❑(21)LIVESTOCK DAMAGE ❑ (22)EROSION OR GULLIES(R DS Groin) <br /> ❑(23)CRACKS WITH ❑ (24)SINKHOLE ❑ (25)APPEARS TOO STEEP <br /> ❑(26)DEPRESSIONS OR BULGES ❑(27)SLIDES ❑(28)SOFT AREAS <br /> ❑(29)OTHER <br /> CONDITIONS OBSERVED: N GOOD ❑ACCEPTABLE ❑POOR <br /> Page 1 of 4 <br />