Firefighter recalls Searsmont's ticking time bomb blast

Liberty fire Chief Bill Gillespie says crews at Robbins Lumber Mill in Searsmont, Maine, walked into a ticking time bomb on May 15, when a silo blast killed three people. A NIOSH review found firefighters did not know the oxygen-limited silo was an explosion hazard—and that applying water helped trigger the blast.

Key Takeaways

• Gillespie called the Searsmont silo response a ticking time bomb after a May 15 explosion at Robbins Lumber Mill.
• NIOSH found crews did not know the silo limited oxygen or that its contents posed an explosion hazard.
• The agency said applying water to the silo caused it to explode.
• Three people died: firefighter Andrew Cross, Assistant Fire Chief Wayne Woodbury, and mill co-owner Alden Robbins.
• Gillespie says Maine departments are working statewide so another silo fire is not fought the same way.

What happened at the Searsmont lumber mill?

On May 15, Liberty fire Chief Bill Gillespie and members of his family responded to Robbins Lumber Mill in Searsmont after a silo exploded. Speaking later from Liberty, Maine, Gillespie summed up the danger in one line that has defined the story: they walked into a ticking time bomb.

The timing still haunts him. "That's two generations of my family that could have been wiped out had we been there 15 minutes sooner," Gillespie said. "I think about that all the time that we take risks."

Those remarks, reported by WMTW, frame why the case still matters months later. It is not only a local tragedy. It is a warning about how ordinary firefighting tactics can collide with industrial hazards that first responders never see coming.

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Why did water turn the silo into a time bomb?

According to the National Institute for Occupational Safety and Health, the firefighters did not know the silo was designed to limit oxygen. They also did not know its contents were an explosion hazard. Because of what was inside, NIOSH said, applying water to the silo caused it to explode.

That finding cuts against instinct. Firefighters are trained to put water on fire. Gillespie stressed that the same approach had been used on similar fires many times before, and that Searsmont had not received additional training that would have flagged the oxygen-deprived silo as a special threat.

"That is a way that that fire has been addressed many times prior to that, and there was no additional training that was given to Searsmont for them to know that," Gillespie said. In other words, the ticking time bomb was a hidden condition that looked, from the outside, like a fire crews thought they understood.

Gillespie also pushed back against how the episode has been framed in headlines. "It's a training material. It's something for us to learn from," he said. "Unfortunately, the media looked at it as a headline."

His point is blunt: the NIOSH report is meant to save the next crew, not to simplify a complex industrial fire into a gotcha.

Who was killed in the Searsmont explosion?

The blast killed three people. Morrill firefighter Andrew Cross died at the scene. Searsmont Assistant Fire Chief Wayne Woodbury died a few weeks after the explosion. Mill co-owner Alden Robbins died from his injuries in early July.

Those names turn a technical case study into a human one. Cross was killed where he responded. Woodbury died weeks later from the same event. Robbins, the mill co-owner, died in early July from his injuries.

Gillespie's family near-miss sits beside that loss. A 15-minute difference, he said, could have erased two generations of his own relatives. The Searsmont silo put trained people into a hazard they had not been prepared to recognize.

Why couldn't crews simply let the silo smolder?

Gillespie addressed the idea of waiting while the silo smoldered. He said he could not imagine holding a company in place for six days when the structure was attached to a building holding 30,000 gallons of hazardous fuel and to another building with 3 million board feet of pine.

"Sitting there and let it burn, to me, wouldn't have been the solution," Gillespie said. From his vantage point, inaction carried its own catastrophic downside: a prolonged fire beside massive fuel and lumber stores.

That tension is the core of the ticking time bomb problem. Standard suppression can worsen an oxygen-limited silo fire. Doing nothing can threaten an entire mill complex. Without specific training and hazard information, crews face that choice in real time.

What is Maine learning from the NIOSH silo cases?

Gillespie said firefighters are trained to put water on fire, and that departments across Maine are now working to keep a similar sequence from happening again. The aim is to recognize when a silo is an oxygen-limited system and when water can turn smoldering contents into an explosion.

NIOSH said it has investigated six firefighter deaths or injuries involving silo fires and explosions since 1985. Searsmont is part of that longer pattern, not a one-off fluke. Industrial silos can demand different playbooks than ordinary structure fires.

When first responders say they walked into a ticking time bomb, they are describing incomplete information meeting a high-energy industrial process. The May 15 explosion at Robbins Lumber Mill shows how deadly that gap can be—and why Gillespie wants the NIOSH findings treated as training material statewide.

Three people are already gone. Gillespie's warning is that the next crew should not discover the same time bomb the hard way.