Tennessee Valley Authority · NYSE:TVC
Tennessee Valley Authority — Corporate Update (December 2019)
25 slides from Tennessee Valley Authority's corporate update, Dec 10, 2019
Slide 1: Cumberland Fossil Plant Update
Cumberland Fossil Plant Update December 10, 2019
Slide 2: Agenda
Agenda • Site overview • Beneficial reuse of gypsum and CCR • Wet to dry initiative • Improvements to gypsum wastewater treatment • TDEC Order investigation/actions • Continued operation KINGSTON EIP DRY RUN – 8/23/18 | 2
Slide 3: Cumberland Fossil Plant
Cumberland Fossil Plant Commissioning Date: 1972 Size of facility: Approx 1,300 acres Output: 2,470 megawatts Number of homes powered: 1.1 million Amount of CCR material: Approx 21.5 million cubic yards CCR Beneficial Reuse: 75% reuse of Fly Ash 90% reuse of Gypsum Jobs in Clarksville Area: 446 CUMB
Slide 4: Overview
Overview NPDES Outfall Main Ash Pond Dry Fly Ash Dry Fly Ash Silos Bottom Ash Stack Dewatering ~$100 M investment Gypsum Gypsum Wastewater Southwest Disposal Treatment Plant of Site Complex Proposed ~$100M investment Landfill CUMBERLAND FOSSIL PLANT UPDATE -12-10-19 | 4
Slide 5: Beneficial Reuse of Gypsum
Beneficial Reuse of Gypsum Every year, 90% (750,000 tons) of the gypsum produced is sold for reuse Adjacent wallboard plant utilizes Cumberland’s high quality gypsum in its manufacturing process The wallboard plant employs 140 people directly and created 306 indirect jobs Since the wallboard plant w
Slide 6: Cumberland Water Treatment
Cumberland Water Treatment • Supports ELG compliance and conversion of wet to dry CCR handling • Adopted phased approach to construction - Focus on physical and chemical treatment • Optimized scrubber to reduce selenium • Investing $100M to ensure TVA meets or exceeds permit standards CUMBERLAND FOS
Slide 7: Beneficial Reuse of Fly Ash
Beneficial Reuse of Fly Ash Every year 75% (300,000 tons) of fly ash is reused About 20,000 tons of ash went into the new Hankook Tire plant in Clarksville Cumberland Fossil Plant supplies over 200 concrete plants in the U.S. In concrete, every ton of fly ash that replaces Portland cement reduces ca
Slide 8: Cumberland Environmental Stewardship
Cumberland Environmental Stewardship Cumberland Fossil Plant construction began 1968 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 CUMBERLAND FOSSIL PLANT UPDATE -12-10-19 | 8
Slide 9: Cumberland Environmental Stewardship
Cumberland Environmental Stewardship Ash Disposal Area complete and sluicing began 1972 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 CUMBERLAND FOSSIL PLANT UPDATE -12-10-19 | 9
Slide 10: Cumberland Environmental Stewardship
Cumberland Environmental Stewardship Need photo of Scrubber installed scrubber Scrubbers installed Dry Fly Ash silos installed Gypsum production began 1995-1996 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 CUMBERLAND FOSSIL PLANT UPDATE -12-10-19 | 10
Slide 11: Cumberland Environmental Stewardship
Cumberland Environmental Stewardship Dry Fly Ash Stack Bottom Ash Pond Gypsum Disposal TDEC Solid Waste Permit operational: Complex • Landfills constructed • Dry Fly Ash placement began 1996 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 CUMBERLAND FOSSIL P
Slide 12: Cumberland Environmental Stewardship
Cumberland Environmental Stewardship 24/7 Operation of gypsum dewatering plant Gypsum flow diverted to dewatering plant Dry stacking gypsum began 2009 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 CUMBERLAND FOSSIL PLANT UPDATE -12-10-19 | 12
Slide 13: Cumberland Environmental Stewardship
Cumberland Environmental Stewardship Bottom Ash Dewatering Bottom Ash Dewatering and gypsum wastewater treatment systems construction started Target completion for dry handling conversion 2020 2019 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 CUMBERLAND F
Slide 14: Cumberland Environmental Stewardship
Cumberland Environmental Stewardship Temporary lined basin installed 2019 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 CUMBERLAND FOSSIL PLANT UPDATE -12-10-19 | 14
Slide 15: Cumberland Environmental Stewardship
Cumberland Environmental Stewardship Lined Basins Planned Start of repurposing the Main Ash Pond to lined basins 2020 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 CUMBERLAND FOSSIL PLANT UPDATE -12-10-19 | 15
Slide 16: Cumberland Environmental Stewardship
Cumberland Environmental Stewardship Proposed Landfill Planned start of Proposed Landfill construction 2021 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 CUMBERLAND FOSSIL PLANT UPDATE -12-10-19 | 16
Slide 17: Cumberland Environmental Stewardship
Cumberland Environmental Stewardship Main Ash Pond Dry Fly Bottom Ash Stack Ash Pond Gypsum Disposal Planned completion of Complex Corrective Action/Risk Assessment (CARA) Plan 2022 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 CUMBERLAND FOSSIL PLANT UPDA
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Slide 19: Reservoir Health and Water Supply
Reservoir Health and Water Supply • Water Quality Supports TDEC-Designated Uses for: - Water Supply - Fish & Aquatic Life - Recreation - Livestock Watering & Wildlife - Irrigation - Navigation • Long-term Monitoring Program - Began monitoring in 1991 - Fish and benthic communities healthy CUMBERLAND
Slide 20: For More Information
For More Information Cumberland Fossil Plant https://www.tva.gov/Energy/Our-Power-System/Coal/Cumberland- Fossil-Plant Air Quality – Water Quality – Ash Storage https://www.tva.com/Environment/Environmental-Stewardship TDEC Order https://www.tva.com/tdec Groundwater Monitoring www.tva.com/ccr CUMBER
Slide 21: Slide 21
Slide 22: Environmental Investigation
Environmental Investigation • Groundwater Study • Over 30 Wells • Geology • Residential Wells • Coal Ash & Soils • Cumberland River/Wells Creek • Sediment • Water • Aquatic Life • Structural Integrity CUMBERLAND FOSSIL PLANT UPDATE -12-10-19 | 22
Slide 23: Groundwater
Groundwater • No offsite groundwater impacts • Collecting additional data for State and Federal programs to evaluate corrective actions CUMBERLAND FOSSIL PLANT UPDATE -12-10-19 | 23
Slide 24: TDEC Order Environmental Investigation Timeline
TDEC Order Environmental Investigation Timeline January 2017 February 2020 TVA Submits Complete Environmental April 2016 Investigation Plan Investigation TDEC Requests Environmental July 2018 September 2021 Investigation Plan Begin Environmental Submit Corrective Action/Risk Investigation Assessment
Slide 25: Slope Stability
Slope Stability CCR Unit Normal Earthquake Bottom Ash Pond ✓ ✓ Stilling Pond (including Retention Pond) ✓ ✓ Dry Ash Stack ✓ ✓ Gypsum Storage Area ✓ ✓ CUMBERLAND FOSSIL PLANT UPDATE -12-10-19 | 25
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