



1 / 7 Chevron Chevron Circa 1890. A machine shop on the thousand acres surrounding the original mine that became known as Iron Mountain.

If you’ve ever wondered where it all goes—printouts, photocopies, purchase orders, meeting minutes, invoices, correspondence, training manuals, personnel files, audit reports, PowerPoint decks, tax returns, financial statements, contracts; all the stuff, in short, that your company produces and is often required, by law, to keep—your answer might be a decommissioned Hudson Valley iron mine called Iron Mountain. “The Mountain,” as employees sometimes refer to it, is a storage facility for a Boston company, also called Iron Mountain, that is one of the most successful document-storage firms in the United States.

On most weekdays, a fleet of trucks and couriers collects materials from offices and delivers them to Iron Mountain’s facilities—there are more than a thousand of them worldwide—where they are stored, in some instances, for decades. Factor in non-paper records, such as audio tapes and data cartridges, and it’s a huge business. Last year, Iron Mountain had a little more than three billion dollars in revenue. Considered all together, its facilities may house one of the largest repositories of records in the world.

The Mountain was Iron Mountain’s first facility; it opened in 1951. Today, the vast majority of the firm’s storage is above-ground, in warehouses, hangars, and nondescript office buildings, but documents still make their way almost daily to Germantown, New York, a quiet village a few miles from the Hudson River. The trucks follow an untrafficked country road lined with apple orchards, eventually reaching the mine, which is set far back from the road, behind a tall, white façade that gives it the look of an old dockside warehouse.

This summer, when I visited, two men met me at the entrance: Bill Mesick, a solidly built man with a matter-of-fact demeanor, and Randy Crego, who is tall and voluble. Both of them had worked beneath the Mountain for decades before taking management positions above ground. (Mesick oversees two underground facilities; Crego is the general manager of Iron Mountain’s New York territory.) They led me through the façade’s front door and into a surprisingly normal-looking office, with cubicles, a conference room, and a fancy coffee machine. The mine, Crego said, was “like an ant farm,” with two hundred and twenty-five individually locked vaults, each with its own combination, on seven underground levels. Today, the former mine functions as a premium facility for Iron Mountain’s most demanding clients—usually clients who want to store “vital” records or objects, things that are irreplaceable or secret.

Documents arrive through the facility’s neatly-organized loading dock. Chet Smith, a soft-spoken Iron Mountain veteran, sat at a workstation, affixing bar codes to a stack of cardboard boxes, inspecting a padded case full of laboratory slides, and managing a database of the Mountain’s contents. Most of the time, Smith explained, he has only the vaguest idea of what the boxes contain. (“This one,” he said, pointing to the slides, “is tissue samples—that’s all I know.”) But he knows the mine itself by heart. After working there for thirty-five years, Smith has memorized “about eighty per cent” of the vault’s combinations. “Our customers,” Crego told me later, “would die for an employee like Chet Smith: look at that longevity, that loyalty.” Along with security clearances and background checks, long-term employees are one way that Iron Mountain insures security.

Today, the Mountain is filled, in large part, with colorless corporate documents. But it wasn’t always so. As we walked farther inside, toward the vaults, Mesick told me about the nineteen-seventies and eighties, when the firm safeguarded interesting objects with intrinsic value. The Mountain has stored musical instruments, valuable antiques, and celebrity memorabilia. One client, “Madame X,” was an anonymous art collector. Once a year, she’d visit with a curator, lay out a spread of wine and cheese, and admire her paintings underground. Later, Mesick and Crego pointed out an old photograph: it shows two men carrying Monet’s “Boating on the River Epte” through the mine’s interior entrance, a bank-vault door weighing twenty-eight tons.

That door is still installed—a single person can move it, but just barely—and as we passed through it the air grew noticeably cooler, and a vast, roaring sound drowned out our footsteps. This was the sound, Crego explained, of the industrial-strength dehumidifiers that dry out the damp interior of the mine. Inside, the facility is immaculate. The corridors, which trace long, angled shapes and sometimes slope up or down, are freshly painted. The vaults, which line the corridors, are numbered and color-coded. You can sense the original outlines of the iron mine in today’s odd, sprawling floor plan. Mesick and Crego opened up a few of the vaults. One, which belonged to a county government, held endless drawers of birth and death certificates. Another was empty except for two large, slightly sinister freezers: one contained D.N.A. samples, while the other, empty, served as a backup for the first. At the end of a long hallway, a lonesome room contained a small data center; another room nearby held records from East River Savings Bank, Iron Mountain’s first customer. Some of those records had been deposited during the Truman Administration; E.R.S.B. now belongs to a much larger bank.

Aside from the whoosh of the ventilation and the echoes of our voices, it was perfectly silent. Mesick and Crego had both worked security in the Mountain as younger men—a guard goes on a solo walk through the whole facility every two hours—and they agreed that it could get “spooky” down there. (“You hear sounds that you don’t want to hear,” Crego said—perhaps rocks falling on the roof. “It’s like, What was that? I don’t know, and I don’t know if I want to!”) Half-century-old photographs show security guards standing in the same doorways, walking the same halls. In the sixties and early seventies, Mesick said, people sometimes slept in the mine: it contained fallout shelters, built and maintained by Iron Mountain for executives from Exxon, Shell, and other big companies. One especially elaborate shelter, he said, had sixty-five hotel rooms, each with a private bath, and a large cafeteria with a commercial kitchen; in the mid-century-modern bedrooms, curtains obscured the concrete. According to Mesick, in the event of nuclear war, some executives, along with their families, would have been evacuated by helicopter from New York City. “They’d hired local folks to tend to them, to cook for them, to clean for them,” Mesick told me. “Their idea was to wait out the storm while the debris and radioactivity were going on overhead—then they were going to come out and sell oil to everyone who was left.” Every now and then, Mesick recalled, the executives would run a “live exercise”—essentially, they’d come and hang out for the weekend. Even though he had thought the plan “a little strange,” he was grateful for the shelter’s protection. Had war broken out, he might have brought in his own family. “We’re a lot closer to this facility than those executives were,” he pointed out, “and I’ve got the key to this place.”

There are corners of the mine, meanwhile, where you can see even older layers of history. One stairway, marked NOT AN EXIT, led to an unfinished, cavern-like area, where the air smelled of old rock and fresh water. According to Iron Mountain’s corporate history, in the nineteen-thirties and forties, the company’s founder, a German-American entrepreneur named Herman Knaust, took advantage of the mine’s darkness and moisture, and grew mushrooms in it. At that time, his company, Knaust’s Cavern Mushrooms, may have been the largest producer of mushrooms in the world, and Knaust was widely known as “the mushroom king.” (In 1944, The New Yorker wrote about Knaust’s mushroom caves in an article called “A Strange Place to Be Growing Things.”) Knaust moved into the storage business only when, after the Second World War, American mushroom growers started losing ground to scrappy competitors from Europe and Asia. He brought a flair for publicity to his new company, which he called Iron Mountain Atomic Storage. Knaust purchased the twenty-eight-ton bank-vault door from a bankrupt bank in Ohio—he paid a dollar for the door, and twenty thousand to ship it—because he thought it gave the mine a Fort Knox atmosphere. He hired a dozen ex-cops, armed them with Colt .45s, and stationed them as guards. He put in an underground generator because, he told the Wall Street Journal, “If we got into an atomic war, we might need that power.” He made boastful but accurate predictions, telling the Journal, “This business will mushroom.”