Climate change isn’t what’s driving some U.S. coal-fired power plants to shut down. It's the expense of stricter pollution controls on their wastewater.
Dozens of plants nationwide plan to stop burning coal this decade to comply with more stringent federal wastewater guidelines, according to state regulatory filings, as the industry continues moving away from the planet-warming fossil fuel to make electricity.
The new wastewater rule requires power plants to clean coal ash and toxic heavy metals such as mercury, arsenic and selenium from plant wastewater before it is dumped into streams and rivers. The rule is expected to affect 75 coal-fired power plants nationwide, according to the Environmental Protection Agency.
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A flag with the EPA logo flies in front of the Environmental Protection Agency on Tuesday, Jan. 1, 2019. Recently, a new rule requiring power plants to clean toxic heavy metals before dumping them into the water will affect 75 coal-fired power plants, according to the agency. (Bill Clark/CQ Roll Call)
Those plants had an October deadline to tell their state regulators how they planned to comply, with options that included upgrading their pollution-control equipment or retiring their coal-fired generating units by 2028.
The national impact of the wastewater rule is still coming into focus, but at least 26 plants in 14 states said they will stop burning coal, according to the Sierra Club, which has been tracking state regulatory filings. Twenty-one of the plants intend to shut down, and five indicated they may switch to natural gas, the environmental group said.
"The free ride these plants have been getting is ending in a lot of ways," said Zack Fabish, a Sierra Club lawyer. "And them choosing to retire by 2028 probably reflects the reality that a lot of the subsidies they have been getting in terms of being able to dump their wastewater into the commons, they are not going to be able to do that in the future."
The rule will reduce the discharge of pollutants into the nation’s waterways by about 386 million pounds annually, according to EPA estimates. It's expected to cost plant operators, collectively, nearly $200 million per year to implement.
Those that intend to close include two of Pennsylvania's largest coal-fired power plants, Keystone and Conemaugh outside Pittsburgh, which said they will stop using coal and retire all of their generating units by Dec. 31, 2028, according to regulatory notices obtained separately by The Associated Press.
The twin smokestacks at the Stanton Energy Center, a coal-fired power plant, in Orlando, Florida. (Paul Hennessy/SOPA Images/LightRocket via Getty Images)
The plants opened more than 50 years ago and together employ about 320 full-time workers and 170 contractors. They generate enough power for perhaps 1.5 million homes, according to industry averages for coal plants of their size.
In addition to Pennsylvania, states with power plants that plan to stop using coal by 2028 are Arkansas, Georgia, Indiana, Louisiana, Maryland, Michigan, North Carolina, Ohio, Oklahoma, South Carolina, Tennessee, Texas and West Virginia, the Sierra Club data shows.
Power producers that say they will shutter coal-fired units as a result of the new rule include Atlanta-based Southern Co. and Houston-based NRG. Southern, which operates electric utilities in Georgia, Alabama and Mississippi, said it will shutter two-thirds of its coal fleet, including units at the nation’s two largest coal-fired power plants, Scherer and Bowen, both in Georgia. NRG said it plans to stop burning coal at its domestic plants outside Texas, and install new pollution controls at its two Texas plants.
The electric power sector has spent years transitioning from coal to cheaper, cleaner-burning natural gas and renewables like wind and solar. Nationwide, about 30% of generating capacity at coal plants has been retired since 2010, according to the Energy Information Administration. (Coal use at power plants is expected to surge more than 20% this year because of sharply higher natural gas prices — the first such increase since 2014 — but the energy agency said it expects that trend to be temporary.)
The long-term move away from coal has been pronounced in Pennsylvania, the nation's No. 3 coal-producing state after Wyoming and West Virginia. Coal’s share of electrical power generation in the state declined from nearly half in 2010 to 10% last year, with operators taking advantage of a statewide boom in natural gas drilling in the Marcellus Shale, the nation’s largest gas field. Seventeen Pennsylvania coal plants have been retired since 2009.
"The smallest, oldest (coal) plants were generally the ones the economics killed first. They were too expensive and too small to be retrofitted to meet new EPA standards," said Jean Reaves Rollins, president of The C Three Group, a market research firm focused on energy infrastructure and utilities.
She said coal plants in competitive electricity markets like Pennsylvania's have also come under pressure. "It is clear in the case of the two Pennsylvania plants, the cost of compliance will put them out of the economic running," she said.
Pennsylvania and neighboring Ohio have accounted for 20% of all coal-fueled power plant shutdowns in the U.S. in recent years, according to federal data.
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The Keystone and Conemaugh plants are owned by a consortium of private investors, with Texas-based power producer Talen Energy also holding a stake. Talen referred questions to the plants’ chief operating officer, who did not return phone calls and emails.
Industry officials contend the mothballing of so many coal plants carries consequences for the nation’s electric grid. Michelle Bloodworth, president and CEO of America’s Power, a trade organization that advocates on behalf of coal-fueled electricity, cited recent blackouts in Texas and elsewhere as examples of "what happens when you go too far too fast."
"We are monitoring the situation currently but we do remain concerned that overly aggressive policies that lead to the premature retirement of dispatchable generation like the coal fleet will jeopardize the reliability and resilience of the electricity grid," Bloodworth said.
In this photo illustration, the Environmental Protection Agency (EPA) logo of the U.S. is displayed on a smartphone and a PC screen. (Pavlo Gonchar/SOPA Images/LightRocket via Getty Images)
Experts have pointed out that in the case of last winter’s massive Texas blackout, most of the megawatts that went offline were generated by gas, coal and nuclear plants.
In Pennsylvania, the planned retirements of Keystone and Conemaugh come as building trade unions, industry groups and coal communities fight the state's planned entry into the Regional Greenhouse Gas Initiative, a multistate consortium that imposes a price on carbon dioxide emissions from power plants that use coal, gas and oil. Pennsylvania would be the first major fossil fuel state to adopt such a carbon pricing policy.
David Masur, executive director of PennEnvironment, an environmental group, said the closures show that "with or without policies to reduce carbon pollution, the companies who own these antiquated power plants intend to shut them down or convert many of them anyway."
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The planned shutdowns could leave Homer City Generating Station as the last large, traditional coal-fired power plant in the state still operating by decade’s end. Homer City, which is east of Pittsburgh and is the largest coal plant in Pennsylvania, has told state regulators it plans to keep operating and abide by the new wastewater limits.
Owners of shuttering plants are responsible for environmental cleanup, according to the EPA.
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