HARRISBURG, Pa. – Last week’s deadly explosion at the U.S. Steel coal-processing plant near Pittsburgh has reignited discussions about the facility’s future, coinciding with the storied American company’s emergence from a prolonged period of instability.

The steel industry’s prospects in the U.S. — along with gains in profits, stock values, and steel prices — have been lifted by years of supportive federal policies, including tariffs on imported steel and backing for trade cases against China.

Most notably, the administration of President Donald Trump delayed new hazardous air pollution standards for about a dozen coke facilities nationwide, including Clairton, and sanctioned U.S. Steel’s nearly $15 billion sale to Japanese giant Nippon Steel.

Nippon Steel’s pledged financial investment promises that steel production will persist in the Mon Valley, a region south of Pittsburgh historically linked with the steel industry.

“We’re injecting capital here. And we wouldn’t have pursued the Nippon Steel deal unless we were absolutely confident in the long-term viability here in the Mon Valley,” U.S. Steel’s CEO, David Burritt, stated at a news conference following the explosion. “This facility is here to stay.”

Will the explosion change anything?

The explosion resulted in two fatalities and sent 10 individuals to the hospital. The blast’s force made it difficult to locate two missing workers amid the debris. Investigations into the cause are ongoing.

The plant is considered the largest coking operation in North America and, along with a blast furnace and finishing mill up the Monongahela River, is one of a handful of integrated steelmaking operations left in the U.S.

The explosion now could test Nippon Steel’s resolve in propping up the nearly 110-year-old Clairton plant, or at least force it to spend more than it had anticipated.

Nippon Steel didn’t respond to a question as to whether the explosion will change its approach to the plant.

Rather, a spokesperson for the company said its “commitment to the Mon Valley remains strong” and that it sent “technical experts to work with the local teams in the Clairton Plant, and to provide our full support.”

Meanwhile, Burritt said he had talked to top Nippon Steel officials after the explosion and that “this facility and the Mon Valley are here to stay.”

U.S. Steel officials maintain that safety is their top priority and that they spend $100 million a year on environmental compliance at Clairton alone.

However, repairing Clairton could be expensive, an investigation into the explosion could turn up more problems, and an official from the United Steelworkers union said it’s a constant struggle to get U.S. Steel to invest in its plants.

Besides that, production at the facility could be affected for some time. The plant has six batteries of ovens and two — where the explosion occurred — were damaged. Two others are on a reduced production schedule because of the explosion.

There is no timeline to get the damaged batteries running again, U.S. Steel said.

Accidents are nothing new at Clairton

Accidents are nothing new at Clairton, which heats coal to high temperatures to make coke, a key component in steelmaking, and produces combustible gases as byproducts.

An explosion in February injured two workers.

Even as Nippon Steel was closing the deal in June, a breakdown at the plant dealt three days of a rotten egg odor into the air around it from elevated hydrogen sulfide emissions, the environmental group GASP reported.

The Breathe Project, a public health organization, said U.S. Steel has been forced to pay $57 million in fines and settlements since Jan. 1, 2020, for problems at the Clairton plant.

A lawsuit over a Christmas Eve fire at the Clairton plant in 2018 that saturated the area’s air for weeks with sulfur dioxide produced a withering assessment of conditions there.

An engineer for the environmental groups that sued wrote that he “found no indication that U.S. Steel has an effective, comprehensive maintenance program for the Clairton plant.”

The Clairton plant, he wrote, is “inherently dangerous because of the combination of its deficient maintenance and its defective design.”

U.S. Steel settled, agreeing to spend millions on upgrades.

Matthew Mehalik, executive director of the Breathe Project, said U.S. Steel has shown more willingness to spend money on fines, lobbying the government and buying back shares to reward shareholders than making its plants safe.

Will Clairton be modernized?

It’s not clear whether Nippon Steel will change Clairton.

Central to Trump’s approval of the acquisition was Nippon Steel’s promises to invest $11 billion into U.S. Steel’s aging plants and to give the federal government a say in decisions involving domestic steel production, including plant closings.

But much of the $2.2 billion that Nippon Steel has earmarked for the Mon Valley plants is expected to go toward upgrading the finishing mill, or building a new one.

For years before the acquisition, U.S. Steel had signaled that the Mon Valley was on the chopping block.

That left workers there uncertain whether they’d have jobs in a couple years and whispering that U.S. Steel couldn’t fill openings because nobody believed the jobs would exist much longer.

Relics of steelmaking’s past

In many ways, U.S. Steel’s Mon Valley plants are relics of steelmaking’s past.

In the early 1970s, U.S. steel production led the world and was at an all-time high, thanks to 62 coke plants that fed 141 blast furnaces. Nobody in the U.S. has built a blast furnace since then, as foreign competition devastated the American steel industry and coal fell out of favor.

Now, China is dominant in steel and heavily invested in coal-based steelmaking. In the U.S., there are barely a dozen coke plants and blast furnaces left, as the country’s steelmaking has shifted to cheaper electric arc furnaces that use electricity, not coal.

Blast furnaces won’t entirely go away, analysts say, since they produce metals that are preferred by automakers, appliance makers and oil and gas exploration firms.

Still, Christopher Briem, an economist at the University of Pittsburgh’s Center for Social and Urban Research, questioned whether the Clairton plant really will survive much longer, given its age and condition. It could be particularly vulnerable if the economy slides into recession or the fundamentals of the American steel market shift, he said.

“I’m not quite sure it’s all set in stone as people believe,” Briem said. “If the market does not bode well for U.S. Steel, for American steel, is Nippon Steel really going to keep these things?”

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Follow Marc Levy on X at https://x.com/timelywriter.