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Pipelines used to carry crude oil.
Photo: Jim Mone (AP)

Unless you’re living in Huntersville, North Carolina, you may be blissfully unaware that the U.S.’s biggest gasoline spill since 1997 happened this past summer. The slowly-unfolding, little-reported-on saga in the state involves a company controlled by special interests like the Koch brothers and Shell, and a pipeline that has been transporting dirty energy for decades. And the crisis of the Colonial pipeline points to one of the next big issues for American fossil fuel infrastructure: what to do about dangerous, aging pipelines as we move to clean energy.

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In August, two teenagers riding ATVs around in a nature preserve outside of Huntersville, a suburb north of Charlotte, noticed gasoline gurgling out of the ground and told the town fire department. (State lawmakers say Colonial at first told them a different story, initially claiming that they’d shut down the pipeline after noticing a pressure drop at another point in the line. A company spokesperson told Earther that they dispatched crews to the site soon after receiving notification of the leak.) At first, the pipeline company reported that only 63,000 gallons of gasoline had been spilled, but throughout the fall, that number steadily crept up: 273,000 gallons in September, 311,000 gallons in November. The company now says nearly 1.2 million gallons have been leaked; that number could still rise as more assessments are done.

While pipeline owners tend to undershoot their initial estimates of spills, this level of screw-up is “somewhat astronomical and not normal,” said Jared Margolis, a senior attorney at the Center for Biological Diversity. It’s unclear why the initial estimates are so far off.


The age of the pipeline, Margolis speculated, may have been a culprit in how the exact number was missed. Unlike newer pipelines, older ones like the Colonial pipeline “don’t have the same mechanisms in place to monitor spills and leaks,” he said. “This is a 40-some-year-old pipeline, it just doesn’t have that kind of technology.”


The Colonial pipeline is owned by a company of the same name, which is, in turn, controlled by companies including Koch Industries (its largest shareholder, which made $85 million in dividends from the pipeline in 2016) and Royal Dutch Shell. The pipeline was initially built in 1963, and stretches from Texas to New Jersey. According to the company, the pipeline transports around 2.5 million barrels of fuel per day, mostly underground, that supplies 45% of the entire East Coast’s gasoline. In 2016, North Carolina alone got 70% of its gasoline from the pipeline. Its owners have said that technology can detect leaks as small as 3% of the pipeline’s daily flow–which works out to around 1.8 million gallons.

Colonial Pipeline (the company) has been doing damage control since the summer. As officials continued to gradually and quietly raise estimates of the spill in the press, it simultaneously bought out three properties near the leak site, spending more on those purchases than it’s spent on environmental penalties levied over the past three decades. Yet the company has not disclosed the cause of the crack in the pipe segment outside of Charlotte. (That same line segment had also been repaired in 2004.) The company said the cause of the crack remains under investigation.


Margolis said that the Colonial pipeline is so old that its anti-corrosion mechanism is inadequate. “That’s scary,” he said, pointing out that newer pipelines with updated technology still have accidents. A Colonial spokesperson said in an email, “This section of pipeline is protected by an epoxy coating. In addition, Colonial employs cathodic protection and related close interval surveys,” among other safety measures.

“When you think about Keystone 1, what’s in the ground, that thing leaked, like, fifteen times the first year or two, and that supposedly had all the bells and whistles, all the new technology,” Margolis said, referencing the numerous accidents the TC Energy-owned pipeline, the predecessor to the Keystone XL project, has had in its 10-year existence. “What we’re talking about here is a whole step removed from that–they basically painted it with tar and threw it in the ground.”


Anti-pipeline activists tend to focus their attention on new infrastructure being built (and for good reason). New construction represents locking the world into new emissions, and it’s much harder to argue for pulling the plug on a pipeline the size of Colonial’s, which would represent a significant disruption in our daily lives if it was to suddenly disappear. The 2016 back-to-back spill and explosion, for example caused gas shortages in six states.

Yet Colonial may represent the next step forward in fighting for an energy transition: figuring out how to decommission pipelines that are falling apart.


“There aren’t that many pipelines proposed for the near future. We know they’re not economical, we know we need to move beyond fossil fuels, so at this point, it’s like, what’s the next issue with pipelines?” Margolis said, pointing out that pipelines like Colonial are particularly dangerous in terms of explosions, water pollution, and other on-the-ground impacts. “There’s a couple ways to deal with this aging infrastructure. The big way, the main way we see it, is that these things should be decommissioned. When you see a pipeline that’s this old with these kinds of problems. It shouldn’t be repaired, it should be shut down.”

A spokesperson for Colonial pointed to an FAQ website with “24 updates” that it uses to inform the public about the leak. “Importantly, and while not noted in your post, Colonial has collected more than 200 water well and surface water samples since August and no petroleum constituents have been detected in any of those samples.


There are around 190,000 miles of pipelines that transport liquid petroleum products across the U.S. Deactivating pipelines is a messy, protracted affair, with several steps required from regulatory bodies to make sure it’s done correctly. It’s also expensive: Enbridge has estimated that properly deactivating its aging Line 3 pipeline and taking it out of the ground would cost more than $1.2 billion dollars. The company is currently considering simply abandoning it and paying off the landowners involved, which it says would cost a relatively paltry $85 million, but leave corrosive pipes littered underneath the landscape.

Activists opposing new pipelines also haven’t stopped fighting them even after being built. The resistance to the Dakota Access pipeline morphed from blocking construction to shutting off a functioning pipeline after Trump lifted blocks set by his predecessor and allowed the pipeline to begin transporting oil. However, in July of last year, a judge ruled that the government did not complete an adequate impact assessment


For older pipelines like Colonial, which have been around long enough to survive any legal challenges related to their initial construction, the chance for shutdown could come when the owners make moves to make significant repairs–especially if those repairs cross new territories or require new permits. That struggle is playing out right now in Minnesota, where Enbridge is looking to construct a new pipeline to replace the crumbling Line 3. The company’s proposed route for the replacement is facing legal challenges and significant backlash from Indigenous groups and activists who say the pipeline violates treaty rights with tribes in the area.

Just because pipelines like the Line 3 replacement or Colonial aren’t technically new infrastructure doesn’t mean that they can’t keep the U.S. locked into using dirty fuels. If shareholders spend big to keep a pipeline working, they’ll be less and less interested in suddenly doubling back on that investment.


“If you rebuild a pipeline, just like building a new pipeline, you’re putting millions and millions of dollars into it,” Margolis said. “You’re locking us into fossil fuel use for decades.”

Correction 5:47pm ET, March 8: A previous version of this story incorrectly stated that gasoline is more dense than water, which may have contributed to inaccurate estimates of the spill’s severity. Gasoline is less dense than water. Further, the story stated that the pipeline had a “five-foot” crack, which was incorrect; the section of pipe the company removed to fix the pipeline was reportedly five feet in length. Finally, Colonial said this section of the pipeline is coated in epoxy, while the story initially said it was coated in coal tar. We’ve added additional details and quotes from a company spokesperson above. We regret the errors.


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