Ash impoundment presence

EPA's Coal Combustion Residuals (CCR) Comprehensive Compliance Report, obtained by a FOIA request to EPA's National FOIA Office (Case No. 2026-EPA-06323, "Granted in Full") and delivered as Comprehensive_Compliance_Report_20250611.xlsx (783 CCR units nationwide, one row per unit, 150 compliance columns). Filtered to the Customer's scope — Unit Type = Surface Impoundment AND Hazard Potential Classification = High — yielding 49 high-hazard surface impoundments at 34 plants. This is the current authoritative equivalent of EPA's retired archive.epa.gov High-Hazard list (50 units / 32 facilities). One row per unit; coordinates (Latitude/Longitude) 100%, no site street address published. Single-Attribute (COAL_ASH_EPA) source. Refresh = a new FOIA request.

Plant-level subset of the annual Form EIA-860 Schedule 2 workbook for power plants reporting an ash impoundment, including whether the impoundment is lined and its operating status alongside plant identity and location.