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DAM NAME: San Luis Tailing Dam DATE OF REPORT: 06 21 16 <br /> GUIDELINES FOR DETERMINING CONDITIONS <br /> CONDITIONS OBSERVED-APPLIES TO UPSTREAM SLOPE,CREST,DOWNSTREAM SLOPE <br /> GOOD ACCEPTABLE POOR <br /> in general this part of thr structure has a Although general cross section is maintained, Conditicns observed in this area appear to threaten the safety of <br /> good appearance,and conditions observed in surfaces may be irregular,eroded,rutted, the dam <br /> rius area do not appear to threaten the safety spatted,or otherwise not in new condi nun <br /> of the dam Conditions in this area do not currently <br /> appear to threaten the safety of the dan. <br /> CONDITIONS OBSERVED-APPLIES TO SEEPAGE <br /> GOOD ACCEPTABLE POOR <br /> No evidence of uncon.roited seepage No Some seepage eiosts at areas other than the Seepage conditions observed appear to threaten the safety of the <br /> unexplained increase m flows from designed drain outfalls,cr other designed drains No dam Example; <br /> drams Alt seepage is-fear Seepage unexplained increase in seepage All seepage 1)Designed drain or seepage flows have increased without <br /> -end+hors did not appear to threaten the is clear Seepage condohnns uns.-rved do not increases in pool level <br /> _afe,V of-he din+ ,tirrentfy appear to threaten the safety of the 2)Drain or seepage flows contain sediment,i e,muddy water or <br /> dam particles in jar samples <br /> 3) Widespread seepage,concentrated seepage,or pond-np <br /> lappears to threaten the safety of the dam <br /> CONDITIONS OBSERVED-APPLIES TO MONITORING <br /> GOOD ACCEPTABLE POOR <br /> Monitoring nn aides movement survey., Monitoring includes movement wrvevs and instrumentation and monitoring described under"ACCtPTASH ' <br /> leakage measurement,,and piewmeter leakage mea>+,remFrits instrumentation is in here are not provided,or required periodic readings are not be rg <br /> readings instrumentat+un is in reliable, serviceable condition A plan for monitoring made,o-unexplained changes in readings are not reamed to by <br /> working condition. A plan for monitoring the instrumentation is in effect by owner Owner <br /> instrumentation and analyzing results by the `eriodic+nspectnxins by Owner or <br /> owner's engineer is in effect Periodic representative <br /> CONnfrtONS OBSERVED•APPLIES TO MAINTENANCE AND REPAIR <br /> GOOD ACCEPTABLE POOR <br /> Dam appears to receive effective on going Dam appears to receive maintenance,but Dam does not appear to receive adequate maintenance One of <br /> maintenance and repair,and only a few some maintenance items need to be more tterris needing maintenance or repair has begun to threaten <br /> ininor items may need to be addressed addressed No major repairs are required the safety of the dam, <br /> OVERALL CONDITIONS <br /> SATISFACTORY CONDITIONALLY SATISFACTORY UNSATISFACTORY <br /> The safety inspection indicates no The safety inspection indicates The safety inspection indicates definite signs of structural <br /> conditions that appear to threaten the symptoms of structural distress distress(excessive seepage,cracks,slides,sinkholes, <br /> safety of the dam,and the dam is (seepage,evidence of minor severe deterioration,etc.),which could lead to the failure <br /> expected to perform sattsfactordy under displacements,etc)which,A conditions ofthe dam if the reservoir is used to full capacity The dam <br /> all design loading conditions Most of worsen,could lead to the tailure of the is judged unsafe for full storage of water. <br /> the required monitoring is being dart. Essential monitoring,inspection, <br /> performed and maintenance must be performed as <br /> a requiremen-for continued full storage <br /> in the impoundment area. <br /> Page 4 of 4 <br />