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DAM NAME: San Luis Tailing Dam DATE OF REPORT: 06 21 16 <br /> TAILING DAM INSPECTION FORM <br /> Directions: Mark and X for conditions found and underline words that apply <br /> SEEPAGE AND DRAIN OUTFALL <br /> PROBLEMS NOTED: ❑(30)NONE ❑(31)SATURATED EMBANKMENT AREA ❑(32)SEEPAGE EXITS ON DAM <br /> ❑(33)SEEPAGE EXITS AT POINT SOURCE 0(34)MINOR PONDING OF PIPE LEAKAGE AT TOE <br /> DRAIN OUTFALL SEEN: 0 YES ❑NO ❑(35)FLOW ADJACENT TO DRAIN PIPE ❑(36)DRAIN OUTFLOW TURBID <br /> ❑(37)DRAIN DRY/OBSTRUCTED 0(38)OTHER: <br /> SHOW LOCATION OF DRAIN ON SKETCH See 2014 Detailed Inspection Report for location;approximately 40 gpm clear flow. <br /> AND INDICATE AMOUNT AND QUALITY OF SEEPAGE Pipes were successfully jetted and camera inspected 19 Aug 2014.Pipes damaged,but <br /> conveying flow. Seepage face at toe drain noted in previous inspections is now dry. <br /> Outfalls now manifolded to pumpback pond. <br /> CONDITIONS OBSERVED: ❑GOOD 0 ACCEPTABLE ❑POOR <br /> STORM WATER MANAGEMENT SYSTEM <br /> PROBLEMS NOTED: ❑(40)NONE ❑(41)NO EMERGENCY SPILLWAY <br /> ❑(42)EROSION AT DROP STRUCTURE ❑(43)CONCRETE DETERIORATED/UNDERMINED ❑(45)STRUCTURE MAY BE TOO SMALL <br /> ❑(46)DIVERSION CHANNEL EROSION ❑(47)INADEQUATE CHANNEL FLOW CAPACITY ❑(48)CHANNEL FLOW OBSTRUCTED <br /> 0(49)OTHER:Engineering design for South Diversion Ditch Improvements was completed in December 2015.Plans and specs <br /> for channel improvements and drop structure replacement address deficiencies noted in 2014 Detailed Inspection Report. <br /> CONDITIONS OBSERVED: ❑GOOD 0 ACCEPTABLE ❑POOR <br /> MONITORING <br /> EXISTING INSTRUMENTATION FOUND: ❑(50)NONE ❑(51)GAGE ROD IN POOL AREA 0(52)PIEZOMETERS <br /> ❑(53)SEEPAGE WEIRS/FLUMES ❑(54)SURVEY MONUMENTS ❑(55)OTHER <br /> MONITORING OF INSTRUMENTATION: ❑(56)NO 0(57)YES <br /> PERIODIC INSPECTIONS BY: 0(58)OWNER ❑(59)ENGINEER <br /> See attached piezometer measurements <br /> CONDITIONS OBSERVED: 0 GOOD ❑ACCEPTABLE ❑POOR <br /> MAINTENANCE AND REPAIRS <br /> PROBLEMS NOTED: ❑(60)NONE ❑(61)ACCESS ROAD NEEDS MAINTENANCE ❑(62)CATTLE DAMAGE <br /> ❑(63)BRUSH ON: UPSTREAM SLOPE/BEACH,CREST,DOWNSTREAM SLOPE,TOE <br /> ❑(64)RODENT ACTIVITY ON: UPSTREAM SLOPE/BEACH,CREST,DOWNSTREAM SLOPE,TOE <br /> ❑(65)OTHER: <br /> CONDITIONS OBSERVED: 0 GOOD ❑ACCEPTABLE ❑ POOR <br /> OVERALL CONDITIONS <br /> Based on this inspection and recent file review,the overall surficial condition is determined to be: <br /> ❑SATISFACTORY 0 CONDITIONALLY SATISFACTORY ❑UNSATISFACTORY <br /> Page 2 of 4 <br />