Some units in the reports are rated poor, which indicates that safety deficiencies are recognized and remedial action is necessary. Why does EPA conclude that this unit is structurally sound?
EPA is working closely with the owners of these units to ensure remedial action and/or additional studies are conducted to upgrade the rating of these units and ensure long term stability. There is a difference between a poor and an unsatisfactory rating. A poor rating indicates that remedial action is necessary, but there is not an immediate safety threat. An unsatisfactory rating, however, indicates that immediate or emergency corrective measures are necessary in fact, the dam or unit is considered unsafe.
