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Home My WebLink About_Cliffside Unit 5 CBE - Appendix A_20200107Duke Energy Coal Combustion Residuals Management Program December 18, 2019 Cliffside Steam Station— Inactive Unit 5 Ash Basin CAMA Closure Plan (Closure by Excavation) Revision 0 Wood E&IS Project No. 7812190194 APPENDIX A: ESTIMATED VOLUME OF CCR IN IMPOUNDMENT wood. Inventory of CCR for North Carolina Coal Ash Impoundments CCR Inventory Data Valid As Of July 31st, 2019 State Site Facility Type Facility Name Current CCR Inventory (tons) NC Allen Pond Active Ash Basin 10,480,000 NC Allen Pond Retired Ash Basin' 6,152,000 NC Asheville Pond 1964 Ash Pond 1,383,000 NC Asheville Pond 1982 Ash Pond 0 NC Belews Creek Pond Active Ash Basin 11,971,000 NC Buck Pond Ash Basin #1 (Additional Primary Pond) 3,551,000 NC Buck Pond Ash Basin #2 (Primary Pond) 1,998,000 NC Buck Pond Ash Basin #3 (Secondary Pond) 864,000 NC Cape Fear Pond 1956 Pond 419,000 NC Cape Fear Pond 1963 Pond 859,000 NC Cape Fear Pond 1970 Pond 839,000 NC Cape Fear Pond 1978 Pond 833,000 NC Cape Fear Pond 1985 Pond 2,815,000 NC Cliffside Pond Unit 1-4 Inactive Ash Basin 0 NC Cliffside Pond Unit 5 Inactive Ash Basin 21352,000 NC Cliffside Pond Active Ash Basin 5,038,000 NC Dan River Pond Primary Ash Basin 0 NC Dan River Pond Secondary Ash Basin 0 NC HF Lee Pond Ash Pond #1 269,000 NC HF Lee Pond Ash Pond #2 529,000 NC HF Lee Pond Ash Pond #3 911,000 NC HF Lee Pond Active Ash Pond 4,516,000 NC HF Lee Pond Polishing Pond 9,000 NC Marshall Pond Active Ash Basin 16,836,000 NC Mayo Pond Ash Pond 6,600,000 NC Riverbend Pond Primary & Secondary Ash Basins 0 NC Roxboro Pond West Ash Basin (includes Southern Extension Impoundment and berms of FGD Ponds) 12,974,000 NC Roxboro Pond East Ash Pond (includes ash stack and Eastern Extension Impoundment)' 7,074,000 NC Sutton Pond 1971 Ash Basin 0 NC Sutton Pond 1984 Ash Basin 0 NC Weatherspoon IPond 1979 Ash Pond 1,676,000 Notes: All CCR Inventories are estimates based off of most recent survey/bathymetric data available. 1. See table titled "Additioanl Breakdown of CCR Quantities" Sheet 1 of 2 Inventory of CCR for Other North Carolina CCR Facilities CCR Inventory Data Valid As of July 31st, 2019 State Site Facility Type Facility Name Current CCR Inventory (tons) NC Allen Landfill RAB Landfill (includes CCR above liner) 1,141,000 NC Buck Dry Ash Stack Additional Primary Basin Dry Stack 235,000 NC Cliffside Dry Ash Stack Ash Storage Area 1 204,000 NC Mayo Pond FGD Settling Pond 29,232 NC Mayo Pond FGD Forward Flush Pond 2,664 NC Roxboro Landfill East Ash Basin Landfill (includes Subgrade Fill, Unlined Monofill, and Lined Monofill) 14,455,000 Additional Breakdown of CCR Quantities CCR Inventory Data Valid As of July 31st, 2019 State Site Facility Type Facility Name Current CCR Inventory (tons) NC Allen Pond Retired Ash Basin ash outside of landfill footprint (excludes DORS No. 1 and DORS No. 2) 4,760,300 NC Allen Landfill Retired Ash Basin ash under the landfill footprint (excludes 600,000 tons of Subgrade Fill) 1,392,000 NC Allen Fill Landfill Subgrade Fill (below liner) 600,000 NC Allen Fill DORS No. 1 (within RAB footprint) 562,800 NC JAIlen Landfill DORS No. 2 (within RAB footprint) 428,400 NC Roxboro Pond East Ash Basin ash outside landfill footprint (excludes Eastern Extension Impoundment) 3,770,400 NC Roxboro Pond East Ash Basin impoundment ash under the landfill footprint 3,186,000 NC Roxboro Pond East Ash Basin Eastern Extension Impoundment 117,500 NC Roxboro Pond West Ash Basin Southern Extension Impoundment 241,000 Sheet 2 of 2