On May 22, 1969, the largest machine ever to walk the earth was completed in a factory in South Milwaukee, Wisconsin. It weighed 13,500 short tons, stood 222 feet tall, and stretched 487 feet long. Its bucket held 220 cubic yards—enough to fit two Greyhound buses inside—and it drew 52,500 horsepower from 28 DC motors, consuming the same electrical load as a town of 27,500 people. The assembly alone required 200,000 man-hours.

They called it Big Muskie, and it was a walking dragline, the only one ever built with hydraulic walking cylinders instead of the traditional mechanical shoes. For 22 years it would operate around the clock, moving more than 600 million cubic yards of earth, before the economic ground beneath it collapsed, taking down the company that built it and erasing a name that had shaped the modern world. That name belonged to Bucyrus-Erie. For 131 years, if something massive needed to be dug, moved, or stripped from the ground, this was the company that got the call.

They dug the Panama Canal, they armed two world wars, and they built the largest machines that ever stood on land. Yet today, every trace of the Bucyrus name has been painted over in yellow. The story begins with a banker who had no idea what a steam shovel was. In 1880, a Cleveland financier named Daniel Parmelee Eells walked into a deal that would reshape the construction industry for more than a century.

Eells was the president of the Commercial National Bank of Cleveland and sat on the boards of 32 companies. He was a deal maker, not an engineer. When an idle foundry in the small town of Bucyrus, Ohio came up for sale, he bought it for $17,000. The foundry sat on just one and a half acres, and its first products were not shovels at all.

The Bucyrus Foundry and Manufacturing Company started by making railroad components—hand cars, locomotive drive wheels, axles, and track switches. It was bread-and-butter work for a small Ohio operation. But in 1882, orders came in from the Northern Pacific and Ohio Central Railroads for something different. They wanted steam shovels.

Eells pivoted his tiny foundry into the steam shovel business. The gamble paid off quickly. Between 1882 and 1885, Bucyrus sold ten shovels and turned an $80,000 profit. By 1888, that number had climbed to 49 shovels.

In 1883, their consolidated steam shovel and derrick took first prize at the National Exposition of Railway Appliances in Chicago. A small foundry in rural Ohio was suddenly competing with established manufacturers on a national stage. Then came a decision that nearly killed the company before it ever reached Panama. In October of 1891, Bucyrus relocated its entire operation to South Milwaukee, Wisconsin.

The deal looked attractive on paper: $50,000 in cash plus $45,000 worth of land, eight acres right next to the Chicago and Northwestern Railroad and a Lake Michigan dock. But the move was a disaster. Only about ten percent of the Ohio workforce made the trip. The rest had to be replaced with Polish, Armenian, German, and Bohemian immigrants who had never built heavy equipment before.

By 1895, the company was effectively bankrupt. Daniel Eells’s own son, Howard, had to be named receiver just to keep the doors open. They reorganized as the Bucyrus Company in 1896 and did not fully emerge from insolvency until 1897. But the company did not just survive—it came back swinging.

By 1899, Bucyrus had built a 95-ton steam shovel with a five-cubic-yard dipper that the trade press called the largest ever built. Steam shovels had gone from a sideline product to 80 percent of the company’s total revenue. And then, in 1904, the United States government came calling with the biggest construction project in human history: the Panama Canal. The reality on the ground at the Culebra Cut was brutal, mechanical, and deeply dangerous.

Bucyrus won the contract to supply the majority of the steam shovels. Seventy-seven of the 102 shovels that carved through the Continental Divide carried the Bucyrus name. Marion Power Shovel, the rival from just 15 miles down the road in Ohio, supplied 24. Each Bucyrus shovel operated with a crew of four—an engineer, two firemen, and a craneman—plus six ground workers.

Operators earned between $210 and $240 a month, with free housing and medical care. In March of 1910, a single Bucyrus shovel set a canal record by moving 70,000 cubic yards of earth in just 26 days. When the Cucaracha slide dumped 500,000 cubic yards of mud into the cut in 1907, it was Bucyrus machines that dug it back out. But the canal was not just an engineering achievement.

It was a graveyard. In December of 1908, a dynamite explosion killed 23 workers and injured 49 more. The official death toll for the entire American construction era was 5,609. Combined French and American estimates put the real number somewhere between 25,000 and 30,000.

In November of 1906, President Theodore Roosevelt traveled to Panama and climbed into the cab of a Bucyrus steam shovel for what became one of the most famous photographs of the entire project. For Bucyrus, it was the ultimate endorsement. By 1911, the company’s net worth had reached $2. 3 million.

Corporate profits from the canal years between 1905 and 1907 alone totaled $500,000. The idle foundry that Daniel Eells bought for $17,000 was now the dominant force in heavy earth-moving equipment on the planet. The Panama Canal made Bucyrus famous, but it was the decades that followed that turned them into an empire. In 1927, the company merged with the Erie Steam Shovel Company from Erie, Pennsylvania.

Erie had built the first lightweight power shovels during World War I—the 20-ton Type B in 1915 and the 13-ton Type A in 1916. The combined company became Bucyrus-Erie, and the industry called them “the longest line” because their product catalog covered everything from small utility shovels to the largest mining machines on Earth. The real engineering leap had started earlier. In 1912, Bucyrus pioneered electric power for excavators using a Ward Leonard direct current control system.

In 1913, a Norwegian-born engineer named Oscar Martinson filed a patent for something that would define the company for the next 80 years. He called it the Martinson tractor. Today we know it as the walking dragline mechanism. It used a tub base with eccentric cam-driven walking shoes that allowed machines weighing thousands of tons to literally walk across the ground at about 12 feet per step.

Bucyrus acquired the rights to this technology in 1931 when they purchased the Monighan Manufacturing Company of Chicago. From that point forward, they owned the future of large-scale surface mining. Between the wars, Bucyrus-Erie built an unmatched engineering bench. The 50-B, introduced in 1923, became the first heavy-duty shovel with full 360-degree rotation.

Five hundred thirty-four units rolled out of South Milwaukee between 1923 and 1939. Then came the 10-B in 1934, which became the company’s mass-market workhorse. Over the next 25 years, Bucyrus-Erie built 10,053 units that shipped to construction sites and mines across the globe. No other model in the company’s history came close to those production numbers.

When the world went to war twice, the company went with it. During World War I, the South Milwaukee factory produced 150,000 eight-inch artillery shells and 100 recoil slides. But the key detail that almost nobody talks about is what happened in 1915, a full two years before America officially entered the war. Bucyrus co-founded the Mississippi Valley Products Company specifically to manufacture shell blanks for the British military.

They were arming the allies in secret while the United States was still officially neutral. By 1918, annual sales had reached $6. 6 million. World War II was even bigger.

The South Milwaukee plant manufactured 240-mm howitzer barrels, carriages, mounts, and transport vehicles. Between 1940 and 1944, excavator shipments alone exceeded $44 million. Two-thirds of the company’s entire production went directly to the war effort. At the Glassport Foundry in Pennsylvania, the workforce went from under 50 people to 3,200, pouring armor steel, casting tank turrets, and forging ship anchors.

By 1945, Bucyrus had delivered 3,000 units to the military and its allies. The most unusual piece of war production came not from South Milwaukee, but from Lincoln, England. In 1930, Bucyrus formed a joint venture with the British firm Ruston and Hornsby, called Ruston-Bucyrus. In 1939, Winston Churchill personally commissioned that joint venture to build one of the strangest weapons of the entire war.

Churchill wanted a machine that could cut a trench through the German Siegfried Line fortifications. He called the project Cultivator Number Six, also known by the code name White Rabbit Number Six. The prototype was nicknamed Nelly. The initial grant was one million pounds sterling.

French soldiers were sent to collect soil samples along the Siegfried Line so the engineers in Lincoln could test their designs. The Germans noticed the unusual patrol activity, though they never figured out what the French were looking for. The machine itself was 77 feet long, seven feet wide, eight feet tall, and weighed 130 tons. It could cut a trench seven and a half feet wide and five feet deep while moving at roughly two-thirds of a mile per hour.

The original design called for Rolls-Royce Merlin engines—the same engines that powered the Spitfire. When Merlins became too valuable for the air war, the engineers redesigned the machine with dual 600-horsepower Davey Paxman diesels instead. A scale model was built secretly by the Bassett-Lowke Model Company in the cellar of a hotel in Bath. Churchill ordered 200 infantry versions and 40 wider officer versions that could accommodate tanks, but only about nine were ever built before the project was shelved.

Churchill called the machine “My Mole” and later said he remained impenitent about the whole affair. After the wars, Bucyrus-Erie entered what can only be called the age of the super strippers. These were the largest land machines ever constructed, built specifically to strip away hundreds of feet of overburden to reach the coal seams underneath. The 3850-B, nicknamed Big Hog, arrived in 1962 at Peabody Coal’s Sinclair Mine in Kentucky.

It weighed 18 million pounds and carried a 115-cubic-yard bucket on a 215-foot boom. Only two were ever built. In 1960, a precision scale model of the 3850-W was presented to President Dwight Eisenhower. That model was later transferred to the Smithsonian Institution.

The 1950-B, Silver Spade, followed in 1965. It weighed 14 million pounds, stood 220 feet tall, and produced 13,500 peak horsepower from 14 AC motors fed by a 7,200-volt trailing cable. The bucket held 105 cubic yards and could reach 390 feet. The entire machine was controlled by just two hand levers and two foot pedals.

The Silver Spade ran for 41 consecutive years, from 1965 to 2006, and moved 607 million, 226,370 cubic yards of earth—roughly twice the volume of the entire Panama Canal. When it was finally scrapped in February of 2007, it was the longest-serving super stripper in history. In 1967, the Gem of Egypt joined the fleet with a 130-cubic-yard bucket on a shorter boom designed for a different mine geometry. Twenty-five thousand people attended its dedication ceremony at the Egypt Valley mine site.

When 25,000 people show up to watch a shovel start digging, the machines have become something larger than industrial equipment. They had become spectacles. And then, in 1969, came Big Muskie, the machine that pushed Bucyrus-Erie into territory no engineering company had ever reached. Its boom was actually two 2570-model booms joined together.

The wire ropes were five inches thick, the largest ever manufactured at the time. Individual chain links weighed roughly 1,000 pounds each. It operated 24 hours a day, seven days a week, 364 days a year, and moved 608 million cubic yards of earth. But the empire was standing on ground that was about to shift.

In 1974, Bucyrus-Erie looked invincible. The company had a $636 million order backlog—roughly a 15-year supply of work. They doubled their factory space from 2. 3 million to 4.

6 million square feet and expanded the workforce by 80 percent. By 1979, shipments hit $550 million. Revenue had grown seven times since 1962, and profit had increased by 2,500 percent. The company was the undisputed king of mining equipment.

Then the world changed. Oil prices collapsed in the early 1980s, and with them went the economics of coal mining that had justified the construction of machines like Big Muskie and the Silver Spade. Environmental regulations tightened across the board. The Surface Mining Control and Reclamation Act had already imposed strict requirements on strip mine operators, and the public backlash against mountaintop removal in Appalachia was growing louder every year.

The market for giant stripping shovels and draglines was shrinking fast, and nobody was ordering new ones. In 1982, the company made what many consider its first fatal mistake. They acquired Western Gear Corporation, a California aerospace firm that had nothing to do with mining or construction. Internal documents later described the purchase as an insupportable drain on resources.

In 1984, management created a holding company called Becor Western in a failed attempt at a takeover defense. By 1987, outside consultants delivered a blunt assessment: profitability was not likely to improve until 1990, if then. That assessment turned out to be wildly optimistic. Then Wall Street showed up.

In 1988, Goldman Sachs executed a leveraged buyout that loaded the company with $100 million in debt against just $16 million in equity. The annual debt service alone was $21 million. The company had to generate $21 million in cash every single year just to service the interest before it could spend a dollar on operations, maintenance, or new equipment. For a company already struggling with declining orders, it was a financial death sentence written on Wall Street letterhead.

Meanwhile, in eastern Ohio, the Clean Air Act of 1990 was making the high-sulfur coal that Big Muskie had been uncovering for two decades essentially unmarketable. Power plants across the country were switching to low-sulfur Western coal from Wyoming and Montana. The coal that Big Muskie stripped from the earth was suddenly worth less than the electricity it cost to run the machine. The dragline that consumed the power of an entire town had no economic reason to exist.

Big Muskie was retired in January of 1991 after 22 years of continuous operation. The largest mobile land machine ever built simply stopped walking. Between 1990 and 1993, Bucyrus-Erie posted $108 million in net losses. Revenue crashed to $198 million.

On February 18, 1994, the company filed for Chapter 11 bankruptcy protection. Creditors accepted 87 percent of the company’s stock in exchange for forgiving $135 million in debt. Ten months later, on December 14, the company emerged from bankruptcy, but it was a shadow of what it had been. The workforce was gutted, the product line was narrow, and the Bucyrus name carried the stain of a leveraged buyout that never should have happened.

Then the story took a turn that nobody expected. In January of 2000, a man named Tim Sullivan walked back through the door. Sullivan had joined Bucyrus in 1976, left in 1998, and returned to find the company losing $33 million a year on revenue of $280 million with just 1,700 employees left. There were no acquisitions, no growth strategy, and no confidence from the market.

Sullivan understood that the mining equipment business had not disappeared. It had consolidated. The question was whether Bucyrus would be the company doing the consolidating or the one getting swallowed. His plan started with eliminating the company’s oldest enemy.

Since 1884, the Marion Power Shovel Company had operated just 15 miles down the road from the original Bucyrus Foundry in Ohio. For 113 years, the two companies had battled for every major contract on Earth. When Bucyrus built the Silver Spade in 1965, Marion responded the same year with the 6360, nicknamed the Captain—15,000 tons, a 180-cubic-yard dipper, a 215-foot boom, and a $25 million price tag. When NASA needed crawler transporters to carry rockets at Cape Canaveral in the early 1960s, Marion won the bid and built two transporters for $14 million each.

Those crawlers are still carrying rockets today, six decades later. The rivalry was so intense that the two companies managed to agree on exactly one thing in over a century: a single patent cross-license, where Marion licensed its knee-action crowd mechanism to Bucyrus and Bucyrus licensed its cable crowd mechanism to Marion. That was the only cooperative agreement between the two rivals in 113 years. In 1997, three years before Sullivan returned, Bucyrus acquired Marion for $40.

1 million. The Marion factory in Ohio was closed. With Marion came the NASA crawler transporter contract and every other Marion customer on the books. Sullivan used that foundation and kept building.

In 2007, he acquired the German mining equipment maker DBT for $710 million, giving Bucyrus a foothold in underground mining and European markets. In 2010, he bought Terex Mining for $1. 3 billion, adding trucks and hydraulic shovels to the lineup. Revenue climbed from $280 million to $3.

65 billion—a 14-fold increase. Earnings before interest, taxes, depreciation, and amortization went from essentially nothing to $850 million. The workforce grew from 1,700 to 11,800 employees. Fortune magazine named Bucyrus the ninth fastest-growing company in America.

The company that had been bankrupt just six years before Sullivan arrived was now one of the fastest-expanding industrial firms in the country. And that is exactly when Caterpillar came calling. On November 15, 2010, Caterpillar announced its intention to acquire Bucyrus International. The timing was deliberate.

The global mining boom was in full swing, commodity prices were soaring, and Caterpillar wanted to dominate the mining equipment market. The initial offer was $68 per share. The Bucyrus board rejected it. A bidding war followed.

The final price settled at $92 per share, a 32 percent premium over the original bid. The total deal, including net debt, came to approximately $8. 6 billion—the largest acquisition in Caterpillar’s history by a wide margin. The deal closed on July 8, 2011, after clearing both the Department of Justice and Chinese regulatory review.

Tim Sullivan walked away with approximately $48. 5 million. Investors who had bought shares at the 2004 initial public offering price of $18 per share realized a 411 percent return in seven years. Then the erasure began.

Caterpillar painted every Bucyrus machine yellow. They replaced the Bucyrus model numbers with Cat designations. The Bucyrus name was removed from every product, every document, every piece of marketing. At the South Milwaukee factory, the one that had been running since April of 1893, Caterpillar laid off 300 workers in March of 2012, roughly 40 percent of the hourly workforce.

By 2015, approximately 450 jobs were gone—55 percent of the total. Engineering was transferred to Tucson, Arizona. Production ceased entirely in 2016. The factory that had built Panama Canal shovels, World War artillery shells, Churchill’s secret weapon, and the largest mobile land machine in human history fell silent after 123 continuous years of operation.

So where are the giants today? Big Muskie was scrapped in 1999. The machine that cost $25 million in 1969—roughly $219 million adjusted—was cut apart and sold as scrap metal for $700,000. The bucket survived.

It sits at Miners Memorial Park in McConnelsville, Ohio, where visitors can walk up and climb inside. Big Hog met a different fate. In 1986, the machine was buried in its own last mining pit. It is still down there.

Big Brutus fared better. The machine stands preserved in West Mineral, Kansas, where it was added to the National Register of Historic Places in 2018. About 22,000 visitors come to see it every year, making it the largest electric shovel still in existence. The land where Big Muskie once walked has been turned into something entirely different.

The Wilds, a 10,000-acre wildlife conservation park, opened in 1994 on the former strip mine in eastern Ohio. Endangered species now roam grasslands that were reclaimed from the scarred earth. Across the world, Bucyrus machines are still standing, and in some cases still working. In Yorkshire, England, a BE 1150-RB walking dragline from 1946 sits preserved at the St.

Aidan’s Nature Reserve. In Alberta, Canada, a 1917 Class 24 dragline at the Reynolds-Alberta Museum is believed to be the oldest surviving dragline in existence. At the Beamish Museum in England, a Ruston-Bucyrus 25-RB from 1931—one of the machines from that same joint venture that built Churchill’s cultivator—is on permanent display. A Bucyrus dragline called Ursa Major, a 2570-WS model, is still digging at the Black Thunder Coal Mine in Wyoming.

It is the largest operational dragline in North America. More than 70 Bucyrus-built draglines are still working across the coal mines of Australia. And the Caterpillar 7495 electric rope shovel, with roughly 237 units built, is the direct engineering descendant of the machines that came out of South Milwaukee. If you see a Cat 7495 loading haul trucks at a copper mine in Chile or an iron ore pit in Western Australia, you are looking at Bucyrus DNA under a coat of Caterpillar yellow.

In August of 2021, a museum opened in South Milwaukee dedicated to the company that ran that town for over a century. It holds 20,000 artifacts from the Bucyrus era. The factory next door sits empty. Daniel Parmelee Eells paid $17,000 for an idle foundry in 1880.

One hundred thirty-one years later, Caterpillar paid $8. 6 billion for what it became. And the name Bucyrus-Erie—the company that dug the canal, armed the wars, built Churchill’s mole, and moved more earth than any company in history—is now a line item on a Caterpillar balance sheet.