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GUIDELINES FOR DETERMINING CONDITIONS <br /> CONDITIONS OBSERVED-APPLIES TO UPSTREAM SLOPE,CREST.DOWNSTREAM SLOPE,OUTLET.SPILLWAY <br /> GOOD ACCEPTABLE POOR <br /> In general,this part of the structure has a near new Although general cross-section is maintained,surfaces Conditions observed in this area appear to threaten the <br /> appearance,and conditions observed in this area do not maybe irregular,eroded,rutted,sinned,or otherwise not safety of the dam. <br /> appear to threaten the safety of the data in new condition.Conditions in this area do not currently <br /> appear to threaten the safety of the data <br /> CONDITIONS OBSERVED-APPLIES TO SEEPAGE <br /> GOOD ACCEPTABLE POOR <br /> No evidence of uncontrolled seepage.No unexplained Some seepage exists at areas other than the drain outfalls, Seepage conditions observed appear to threaten the safety <br /> increase in flows from designed drains.All seepage is clear. or other designed drains. No unexplained increase in of the dam.Examples: <br /> Seepage conditions do not appear to threaten the safety of seepage. All seepage is clear. Seepage conditions 1)Designed drain or seepage flows have increased without <br /> the dam- observed do not currently appear to threaten the safety of increase in reservoir level. <br /> the dam. 2)Drain or seepage flows contain sediment,i.e.,muddy <br /> water or particles in jar samples. <br /> 3)Widespread seepage,concentrated seepage,or ponding <br /> appears to threaten the safety of the dam. <br /> CONDITIONS OBSERVED-APPLIES TO MONITORING <br /> GOOD ACCEPTABLE POOR <br /> Monitoring includes movement surveys and leakage Monitoring includes movement surveys and leakage All instrumentation and monitoring described under <br /> measurements for all dams,and piezometer readings for measurements for Class I&11 dams;leakage "ACCEPTABLE"here for each class of dam, are not <br /> Class I dams.Instrumentation is in reliable,working condi- measurements for Class III dams. Instrumentation is in provided, or required periodic readings are not being <br /> lion.A plan for monitoring the instrumentation and serviceable condition.A plan for monitoring made, or unexplained changes in readings are not <br /> analyzing results by the owner's engineer is in effect. instrumentation is in effect by owner.Periodic inspections reacted to by the owner. <br /> Periodic inspections by owner's engineer. by owner or representative.OR,NO MONITORING <br /> REQUIRED. <br /> CONDITIONS OBSERVED-APPLIES TO MAINTENANCE AND REPAIR <br /> GOOD ACCEPTABLE POOR <br /> Dam appears to receive effective on-going maintenance Dam appears to receive maintenance, but some Dam does not appear to receive adequate maintenance. <br /> and repair,and only a few minor items may need to be maintenance items need to be addressed.No major One or more items needing maintenance or repair has <br /> addressed. repairs are required begun to threaten the safety of the dam. <br /> OVERALL CONDITIONS <br /> SATISFACTORY CONDITIONALLY SATISFACTORY UNSATISFACTORY <br /> The safety inspection indicates no conditions that appear The safety inspection indicates symptoms of structural The safety inspection indicates definite signs of structural <br /> to threaten the safety of the dam,and the dam is expected distress(seepage,evidence of minor displacements,etc.), distress(excessive seepage,cracks,slides,sinkholes, <br /> to perform satisfactorily under all design loading which,if conditions worsen,could lead to the failure of the severe deterioration,etc.),which could lead to the failure <br /> conditions. Most of the required monitoring is being dam.Essential monitoring,inspection,and maintenance of the dam if the reservoir is used to full capacity.The <br /> performed. must be performed as a requirement for continued full dam is judged unsafe for full storage of water. <br /> storage in the reservoir. <br /> SAFE STORAGE LEVEL <br /> FULL STORAGE CONDITIONAL FULL STORAGE RESTRICTION <br /> Dam maybe used to full capacity with no conditions Dam maybe used to full storage if certain monitoring, Dam may not be used to full capacity,but must be <br /> attached maintenance,or operational conditions are met. operated at some reduced level in the interest of <br /> public safety. <br /> CLASSIFICATION OF DAMS <br /> CLASS I CLASS 11 CLASS III <br /> Class I-Loss of human life is expected in the event of Class II-Significant damage to improved property is Class 10-Loss of human life is not expected,and damage <br /> failure of the dam,while the reservoir is at the high water expected in the event of failure of the dam while the to improved property is expected to be small,in the event <br /> line reservoir is at the high water line,but no loss of human of failure of the dam while the reservoir is at high water <br /> life is expected. fine. <br /> Class IV-No loss of life or damage to improved property,or loss of downstream <br /> resource is expected in the event of failure of the dam while the reservoir is at the high <br /> water line. <br />