EPA Releases Reports on Dam Integrity Assessments at 17 Coal Ash Impoundments
"As part of the U.S. Environmental Protection Agency’s ongoing national effort to assess the management of coal combustion residuals, EPA is releasing the final contractor reports assessing the structural integrity of 17 impoundments and similar management units containing coal combustion residuals, commonly referred to as coal ash, at nine facilities. These 17 impoundments have a “high” or “significant” hazard potential rating. A high hazard potential rating is not related to the stability of those impoundments but to the potential for harm should the impoundment fail. A significant hazard potential rating means impoundment failure can cause economic loss, environmental damage, or damage to infrastructure.

The assessments have rated the structural integrity of seven impoundments as “satisfactory,” nine units as “fair,” and one unit as “poor.” None of the units assessed received an “unsatisfactory” rating. According to dam safety experts, only impoundments rated as unsatisfactory pose immediate safety threats.."