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<br />vfp~i:4 ~~r.w=°~~,,_,;:~r`_~pi-L:c^-'~'..!FS-i=:tr,;~:~iu: ~ 'u*-:~~7.~.~~'/Vhi::~!=:~.r~~u'wi1~c ya.~~'L='; ':rIL'~`v"il,G'~
<br />GG~~d7
<br />3r general, this r~arx o~ ihQ st~ruc:ur~ ~:~< a r,ear r+eJa
<br />appearence, and cor+ditiors ~tseraec tin ~+is area oo noi
<br />appear io ihreaie~+ the saf~tv ~~e d~m.
<br />F~CCEPTABLE
<br />~Ithcugh generai ~soss_~ctrcn is ma~ntai~ed. surfaces
<br />may de ~rre~ular. ero~eo. ~ur,e~, spalied. ar otherwise naz
<br />',n nex~ conditio~. L'~nartia~s m~hfs area do not currently
<br />appear?o threaten the safety oi the dam.
<br />'~i~:y?
<br />~codit~ras observed in this area aqpear to threaten in~:
<br />saiety of the dam.
<br />GOOD
<br />No evidence of uncontrolied seepage. No unexplai~ed
<br />]ncrease in ilows from designed drains. Afl seepage is
<br />clear. Seepage conditions do ~ot appear to threaten the
<br />safety of the dam.
<br />GOOD
<br />Nbnitoring 'sncludes movernerrt surveys and ieakage
<br />r~easuremer,ts iar ~II dams, and piezometer readings for
<br />High hazard dams. Instruman'ration is in reliabie, working
<br />condition. A plan tor monitaring the irstrumentation and
<br />analyzing resufts by 4he owner's engineer is in effect.
<br />Periodic inspecfiions by ovme~s engineer.
<br />CONDITIONS OBSERVED - APPLIES TO SEEPAGE
<br />ACCEPTABLE
<br />Some seepage exists at areas other than the drain outfalis,
<br />or other designed drains. No unexplained increase in
<br />seeoage. All seeQage is deac Seepage conditions
<br />observed do not currently appear !o threaten the safety of
<br />?he dam.
<br />•
<br />POOR
<br />Seepage conditions observed appear to threaten the safety
<br />of the dam. Exampies:
<br />11 Designed drain or seepage flows have increased without
<br />+ncrease in reservoir level.
<br />2) Drain or seepage flows contain sediment, i.e., muddy
<br />water or particles in jar samples.
<br />3) Widespread seepage, concentrated seepage, or
<br />ponding appears to threaten the safety of the dam.
<br />CONDITIONS OBS~93VED - APPLIES TO MONITORING
<br />ACCEPTABLE
<br />Monitoring fncludes movement surveys and leakage
<br />measurements for High and Significant hazard dams;
<br />leakage measurements Sor Low hazard dams.
<br />Instrumentation is in servicea~le condition. A plan for
<br />monitoring instrumentaiion is in eKect by owner. Periodic
<br />inspections by owner or representative. OR, NO
<br />MONITORING REQUIRED.
<br />POOR
<br />All instrumentation and monitoring described under
<br />".ACCEPTABLE" here for each dass of dam, are not
<br />arovided, or required periodic readings are noi being made,
<br />or unexplained changes in readings are not reacted to by
<br />the owner.
<br />CONDITIONS OBSERVED - APPLIES TO MAINTENANCE AN~ f2EPAlR
<br />GOOd
<br />Dam appears to receive effective n~-going maintenance
<br />and repair, arsd aral~ a fevu mir~r ilems may need to be
<br />addressed.
<br />ACCEPTABLE
<br />Dam appears to receive maintenance, but some
<br />maintenance items need Yo be addressed. No major repa[rs
<br />are requirecl
<br />POOR
<br />Dam does not appear to receive adequate maintenance.
<br />~ne w more items needing maintenance or repair has
<br />begun to threaten the safety of the dam.
<br />OVERALL CONDITIONS
<br />SATISFACTORY
<br />The safety inspection indicates rro wncliSians that appear to
<br />ihreaten the safeiy of 3he dam, artd the dam is expected to
<br />perform satisfaciorily under all design loading conditions.
<br />Most ot the required mani0.cxing is fieiwnq Qertormed.
<br />CONDITiONALLY SATISFACTORY
<br />The safety inspection indicates symptoms of structural
<br />distress (seepage, evidence of minor displacements, etc.),
<br />which, if conditions worsen, could lead to the failure of the
<br />dam. Essential monitoring, inspection, and maintenance
<br />must be perfca5med as a reauirement for continued fuli
<br />storage in the reservofr.
<br />SAFE STQRAGE LEVEL
<br />FULL STORAGE
<br />{3am may be used ta futP capacity with no candiGons
<br />attached.
<br />CONDIifONAL FULL STORAGE
<br />Dam may be used to full storage if ceRain monitoring,
<br />maintenance, w vperational conditions are met.
<br />UNSATISFACTORY
<br />The safety inspection indicates definite signs of struclural
<br />tiistress (excessive seepage, cracks, slides, sinkholes,
<br />severe deterioration, etc.), which could lead to the failure ofi
<br />the dam if the reservoir is used to full capacity. The dam is
<br />~dged unsafe for fult storage of water.
<br />RESTRICTION
<br />Dam may not be used to full capacity, but must be
<br />operated at some reduced levei in the interest of public
<br />safety_
<br />HAZARD CLASSIFICATION OF DAMS
<br />High hazard
<br />Loss of human life is expected in the event of failure of the
<br />dam, while the reservoir is at the high water line.
<br />Significant hazard
<br />Significant damage to improved property is expected in the
<br />event of failure of the dam while the reservoir is at the high
<br />water line, but no loss of human life is expected.
<br />Low hazard
<br />Loss of human life is not expected, and damage to
<br />improved property is expected to be small, in the event
<br />of failure of the dam while the reservoir is at high water
<br />fine.
<br />NPH hazard - No loss of life or damage to improved property, or loss of downstream resource is expected in the event of failure of
<br />the dam while the reservoir is at the high water line.
<br />!~k""~. ?!2!2~Ok'
<br />,`~~'„i i,r~ 3e(~`,",m.
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