Molly Ayala
Duke Energy, the largest electrical utility in the US, has been involved in several coal ash spills, the most notable being the Dan River spill in 2014, where 39,000 tons of coal ash were released. The company has since faced intense scrutiny and legal action, including a $102 million fine for polluting rivers and a $1 billion lawsuit settlement. Duke Energy is now taking steps to clean up its coal ash basins and transition to cleaner energy sources, aiming for a full exit from coal by 2035. The company has agreed to the largest coal ash cleanup in the US, with an estimated cost of $8-9 billion, and plans to recycle ash from 12 of its ponds, while also investing in natural gas and renewable energy sources.
| Characteristics | Values |
|---|---|
| Date of the coal spill | February 2, 2014 |
| Location of the coal spill | Dan River, North Carolina |
| Cause of the coal spill | A drainage pipe burst at a coal ash containment pond |
| Company responsible | Duke Energy |
| Amount of coal ash spilled | 39,000 tons |
| Impact | Contaminated drinking water source for communities in North Carolina and Virginia, endangering animals and fish species |
| Response | Duke Energy pledged to clean up the coal ash and paid fines of over $5 million |
| Cleanup cost | $3 million |
| Additional steps | Stabilize the material, monitor surface water, and remediate groundwater |
| Total amount of ash to be excavated | 80 million tons |
| Estimated total cost | $8-9 billion |
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What You'll Learn
Duke Energy's $102 million fine for polluting rivers with coal ash
In 2015, Duke Energy, the nation's largest electrical utility company, was fined $102 million for polluting rivers with coal ash. The company pleaded guilty to nine criminal violations of the Clean Water Act, including coal ash discharge violations at power plants near Charlotte, Asheville, Goldsboro, and in Chatham County in central North Carolina. The pollution was caused by a pipe rupture, which released coal ash into the Dan River, coating 70 miles of the river in gray sludge. This event, known as the Dan River spill, brought public and political attention to Duke's coal ash storage practices, with environmentalists claiming that the company had been polluting rivers, streams, and groundwater for years.
The $50.5 billion company was placed on five years of probation and ordered to pay $68.2 million in fines and restitution, as well as $34 million for community service and mitigation projects. A court-appointed monitor was assigned to oversee all company compliance related to coal ash in five states, and the company was required to report to federal parole officers. Additionally, Duke was ordered to run full-page newspaper ads of apology in two national and three North Carolina newspapers.
The Dan River spill highlighted the environmental and health risks associated with coal ash storage and prompted calls for improved regulation and oversight of coal ash facilities. Following the spill, state legislators took action to address the issue, requiring Duke to clean up and safely store the ash in lined, dry pits that are monitored for leaks. The legislation set deadlines for the cleanup of the four coal ash ponds with the worst leaks (by 2019) and the rest by 2029.
In addition to the $102 million fine, Duke Energy also faced additional costs and consequences. The company agreed to a $3 million cleanup agreement with the U.S. Environmental Protection Agency (EPA) to address the coal ash spill in the Dan River. The agreement included a comprehensive assessment to determine the location of coal ash deposits and the removal of deposits along the river. Duke Energy was also required to pay the EPA $2 million in response costs associated with the spill. The total estimated cost of the cleanup plan, including the fines and projects, is projected to be between \$8-9 billion.
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The company's plan to exit coal by 2035
Duke Energy, the nation's largest power producer, has announced plans to phase out coal by 2035. The company aims to reduce coal generation's share from the current 22% of total generation to 5% by 2030 and achieve a full phase-out by 2035. This decision is part of Duke Energy's ""clean energy action plan"" expansion, which includes investing in grid modernization and efforts to replace its coal fleet with renewables, natural gas, and emerging technologies.
To achieve this goal, Duke Energy plans to invest more than $130 billion over the next decade, with $63 billion allocated for the next five years. This funding will support the retirement of additional coal units and the transition to renewable energy sources. The company has already made significant progress, retiring 56 coal units since 2010, representing about 7.5 GW of energy generation.
Duke Energy's integrated resource plan (IRP) for Indiana also reflects this commitment. The IRP envisions a dramatic reduction in carbon emissions, targeting a 63% decrease by 2030 and 88% by 2040 compared to 2005 levels. This plan includes adding over 7 GW of renewables and accelerating the retirement of coal generation, with a targeted exit from coal by 2035.
The company's plans to exit coal by 2035 are aligned with its net-zero goals. Duke Energy has expanded its 2050 net-zero targets to include Scope 2 and certain Scope 3 emissions, aiming to cut greenhouse gas emissions from power generation, fossil fuel purchases, and electricity consumption. Additionally, the company has set a net-zero methane emissions goal by 2030 and is partnering with technology companies to develop a satellite leak detection platform to measure baseline methane emissions.
Duke Energy's path toward a coal phase-out by 2035 involves transitioning to a mix of energy sources, including new nuclear, hydrogen-capable natural gas, solar, wind, and storage options. The company recognizes the need to balance reliability and affordability while transitioning to cleaner energy sources. State regulators will play a crucial role in approving the construction of new plants, with Duke Energy aiming to have them operational by 2028 and 2030, followed by the closure of the coal-powered plant at the same site by 2035.
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The 2014 coal ash spill in the Dan River
On February 2, 2014, an estimated 39,000 tons of coal ash was released into the Dan River in North Carolina, creating the Eden Ash Spill Site. The site, which is home to two identified endangered species, extends approximately 70 miles downstream from the Dan River Steam Station. The river is also used for irrigation, recreation, and as a source of drinking water for residents in North Carolina and Virginia.
The coal ash that was released into the river contained unburned carbon and various toxic metals, including arsenic, cadmium, chromium, copper, lead, mercury, nickel, selenium, and zinc. In response to the spill, the U.S. Environmental Protection Agency (EPA) entered into a $3 million cleanup agreement with Duke Energy Carolinas, LLC, on May 2, 2014. The agreement required Duke Energy to perform a comprehensive assessment, determine the location of coal ash deposits, and remove deposits along the Dan River at an estimated cost of $1 million. Additionally, Duke Energy agreed to pay the EPA $2 million in past and future response costs associated with the spill.
The Southern Environmental Law Center (SELC) and other environmental groups have been pushing for the full excavation of coal ash from Duke Energy's sites, citing the potential risks to human health and the environment. In 2020, Duke Energy agreed to excavate 80 million tons of ash, estimated to be the largest coal ash cleanup in the U.S., with a total of 124 million tons removed. The plan includes removing the remaining ash at the six disputed plants and moving it to lined landfills, although some ash will be allowed to remain underground at two of the plant sites.
The cleanup effort is expected to cost an estimated $8-9 billion and will be completed over the next 15-20 years. The settlement is seen as a victory for environmental groups and local communities, ensuring the safe storage of coal ash and protecting drinking water sources. It also marks a significant step towards a cleaner energy future, with Duke Energy focusing on reducing its reliance on coal and transitioning to more sustainable energy sources.
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The $8-9 billion plan to remove coal ash from 12 ponds
In 2020, Duke Energy agreed to the largest coal ash cleanup in the US, following years of negotiations with environmentalists and local advocacy groups. The $8-9 billion plan will see the excavation and removal of coal ash from 12 of the utility's ponds, with the process expected to be completed in the next 10 to 15 years. The money for the project is expected to be spent over the next 15-20 years.
The settlement came after a North Carolina judge partially rejected Duke's appeal to resist the Department of Environmental Quality's (DEQ) order to excavate and close the remaining six plants and their eleven ponds. The utility had complained that the order would cost an additional $4-5 billion on top of an estimated $5.6 billion plan. However, the current settlement will allow approximately 4 million tons to remain below a landfill, and another almost 30 million tons to be capped and left in place, reducing costs by $1.5 billion.
The plan will remove the remaining ash at the six disputed plants and transport it to lined landfills, although two of the plant sites, the Marshall Steam Station and the Roxboro Plant, will allow some ash to stay underground. Duke Energy has stated that the plan is what's best for ratepayers and the environment, and that it will allow them to fully focus on a cleaner energy future.
The issue of coal ash has been a particularly sensitive topic in North Carolina since 2014, when 39,000 tons of waste poured into the Dan River from a Duke coal ash facility. The coal ash spill, known as the Eden Ash Spill Site, extended approximately 70 miles downstream from the Dan River Steam Station and contaminated the water with unburned carbon and various toxic metals, including arsenic, cadmium, chromium, copper, lead, mercury, nickel, selenium, and zinc. Following the incident, Duke Energy agreed to a $3 million cleanup agreement with the U.S. Environmental Protection Agency (EPA) to address the coal ash spill.
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The 2015 lawsuit settlement forcing Duke to clean up coal ash storage pits
In 2014, 39,000 tons of coal ash waste poured into the Dan River from a Duke coal ash facility. This incident, along with smaller spills during Hurricane Matthew in 2016 and Hurricane Florence in 2018, spurred the Southern Environmental Law Center (SELC) and other environmental groups to push for the full excavation of Duke's coal ash pits.
In 2015, Duke pled guilty in federal court to nine misdemeanours related to its handling of toxic waste. As a result, Duke entered into a settlement with the North Carolina Attorney General, the North Carolina Utilities Commission Public Staff, and the Sierra Club, agreeing to allocate the costs of its coal ash cleanup and reduce expenses by about $1.1 billion over the next 10 years. The settlement also allowed Duke to earn a return on equity off the cost of the cleanup, but at a lower rate than initially proposed.
The current plan involves removing the remaining ash at the six disputed plants and transferring it to lined landfills. Two of the plant sites, the Marshall Steam Station and the Roxboro Plant, will allow some ash to remain underground, with about 852,000 tons of ash staying under the landfill at the Marshall Station and 3.2 million tons remaining underground at the Roxboro Plant.
The settlement is a significant step towards resolving the issue of coal ash storage and ensuring the safe disposal of toxic waste. It is expected to reduce costs for Duke Energy customers and shift the burden of cleanup costs away from North Carolina ratepayers, who were initially slated to bear the full expense.
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Frequently asked questions
A drainage pipe burst at a coal ash containment pond owned by Duke Energy.
The ash was deposited up to 70 miles from the site of the spill and contained harmful metals and chemicals, including arsenic, copper, selenium, iron, zinc and lead. The coal ash immediately endangered animals and fish species that lived in or around the river.
Duke Energy apologised for the incident and pledged to clean up the coal ash. The company later pled guilty to criminal negligence in their handling of coal ash and paid fines of over $5 million.
Duke Energy signed an administrative order for the site cleanup with the United States Environmental Protection Agency (EPA). The agreement required Duke Energy to perform a comprehensive assessment to determine the location of coal ash deposits and to remove deposits along the Dan River at an estimated cost of $3 million.
Yes, Duke Energy has agreed to the largest coal ash cleanup in the US, committing to excavate 80 million tons of ash, with a total of 124 million tons removed. The company also plans to recycle ash from 12 of its utility ponds and take additional steps to stabilise the material in the basin, monitor surface water and remediate groundwater.
