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DAM NAME: San Luis Tailings Dam DATE OF REPORT:July 11,2024 <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 /> El Yes 0 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 /> ®Yes ❑ No Comment: <br /> YR COMPL T R Sec COUNTY DATE OF INSPECTION: <br /> 1993 Ph II,Raise 1 Not Applicable- Costilla May 16,2024 <br /> 1995 Ph II,Raise 2 Sangre de Cristo Land Grant <br /> DAM HEIGHT(FT) DAM LENGTH(FT) CREST WIDTH(Fr) PREVIOUS INSPECTION: <br /> --155 -1,900 -25 May 23,2023 <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+ FT <br /> OBSERVED GROUND MOISTURE CONDITION: El DRY DWET ❑SNOW COVER ❑OTHER <br /> Directions: Mark and X for conditions found and underline words that apply <br /> UPSTREAM SLOPE AND IMPOUNDMENT AREA <br /> PROBLEMS NOTED: <br /> (0)NONE 0(1)EROSION PROTECTION-Missing/Sparse 0(2)BEACH AREA WAVE EROSION <br /> ❑(3)CRACKSWITHDISPLACEMENT 0(4)SINKHOLE 0(5)APPEARS TOO STEEP <br /> ❑(6)DEPRESSIONS ORBULGES 0(7)SLIDES (8)ANIMAL BURROWS <br /> ❑(9)OTHER <br /> CONDITIONS OBSERVED: 0 GOOD El ACCEPTABLE 0 POOR <br /> CREST <br /> PROBLEMS NOTED: <br /> El(10)NONE 0(11)RUTSOR PUDDLES 0(12)EROSION <br /> ❑(13)CRACKS WITH DISPLACEMENT 0(14)SINKHOLES ❑(15)NOT WIDE ENOUGH <br /> 0(16)LOW AREA 0(17)MISALIGNMENT 0(18)IMPROPER SURFACE DRAINAGE <br /> 0(19)OTHER <br /> CONDITIONS OBSERVED: El GOOD 0 ACCEPTABLE 0 POOR <br /> DOWNSTREAM SLOPE <br /> PROBLEMS NOTED: <br /> El (20)NONE 0(21)LIVESTOCK DAMAGE 0 (22)EROSION OR GULLIES <br /> 0(23)CRACKS WITH 0 (24)SINKHOLE 0(25)APPEARS TOO STEEP <br /> ❑(26)DEPRESSIONS OR BULGES ❑(27)SLIDES 0(28)SOFT AREAS <br /> ❑(29)OTHER <br /> CONDITIONS OBSERVED: El GOOD 0 ACCEPTABLE 0 POOR <br /> Page 1 of 4 <br />