The silver spike came down on January 8, 1863, at a muddy ceremony outside Sacramento, California. Governor Leland Stanford drove it into a railroad tie, and the crowd gathered on the wet ground watched the Central Pacific Railroad officially begin. What they were starting was audacious to the point of insanity: lay track east from Sacramento across the flat Central Valley, climb over the Sierra Nevada, cross Nevada and the desert, and meet the Union Pacific, which was building west from Omaha. The two lines would connect somewhere in the middle, and the first transcontinental railroad would exist, a continuous band of iron spanning the width of the United States.

The Union Pacific had the easy route. Prairie, open terrain, a few hills, but nothing that could stop a railroad. The Central Pacific had the Sierra Nevada: a wall of granite rising seven thousand feet, buried under snow for eight months of the year, with slopes so steep that a standing man had to lean forward to avoid falling backward. There were no passes at the right elevation, no natural routes.

The railroad would have to be carved into the mountains with hand tools, black powder, and human labor. The men who would chip tunnels through solid rock and build trestles over bottomless canyons were Chinese immigrants, Irish laborers, and a scattering of Civil War veterans who had survived one kind of hell and were about to enter another. Between 1863 and 1869, these men would move more rock and dirt than any construction project in American history up to that point, and they would build over a thousand miles of railroad through terrain the engineers said was impossible. They did it without engines, without machinery, without bulldozers or excavators.

Just shovels, pickaxes, wheelbarrows, black powder, and hands that bled until they calloused into leather. What they faced first was the granite. The Sierra Nevada is a batholith, a massive intrusion of igneous rock that cooled and solidified millions of years ago. It is not sedimentary stone that yields to a pickaxe.

It is dense, crystalline granite, harder than most steel. A man swinging a sledgehammer against Sierra granite could work an entire day and make a dent measured in inches. The Central Pacific did not need inches. They needed tunnels: fifteen of them, some over sixteen hundred feet long, cut through solid rock at elevations above seven thousand feet.

The longest, the Summit Tunnel, had to be bored through 1,659 feet of granite at an elevation where snow fell from October through May and temperatures dropped to twenty below zero. The engineers knew it was possible. Tunnels had been cut through mountains in Europe using similar methods. But those projects had taken decades.

The Central Pacific did not have decades. They had investors demanding returns, competition from the Union Pacific, and a federal charter that paid them per mile of completed track. The faster they built, the more money they made. So the engineers, led first by Theodore Judah and then by chief engineer Samuel Montague, devised a plan.

Hire as many men as possible. Work around the clock. And accept that some of them would die. The workforce began as a mix.

Irish immigrants fleeing famine and looking for work. Civil War veterans who had survived Shiloh and Antietam and needed a job. Drifters. Miners who had gone bust in the gold fields.

But the work was brutal, and while the pay was decent, it was not enough to keep men on the job. Workers signed on, lasted a few weeks, and quit. By 1864, the Central Pacific was desperate for labor. That is when Charles Crocker, one of the Big Four investors and the man in charge of construction, made a decision that would define the project.

He started hiring Chinese workers. There were thousands of Chinese immigrants in California, most of them veterans of the gold rush who had been pushed out of the mining camps by racial violence and restrictive laws. They worked in laundries, restaurants, and agriculture. They were paid less than white workers and had no legal protections.

Crocker saw them as a resource. They were available. They were cheap. And despite the racist assumptions of the time, they turned out to be the best workers on the line.

Within a year, the Central Pacific workforce was over ninety percent Chinese. At the peak of construction, more than twelve thousand Chinese laborers were working on the railroad. They did the hardest and most dangerous work. They blasted the tunnels.

They built the retaining walls. They graded roadbeds on slopes so steep that men worked roped together to keep from falling. And they did it for less money, in worse conditions, than any white worker would accept. The tunnel work was where the real nightmare lived.

Boring through granite with 1860s technology was a process of unimaginable tedium and danger. There were no tunnel boring machines, no pneumatic drills. The method was simple and brutal. Drill holes into the rock face using hand drills.

Pack the holes with black powder. Light the fuse. Run. Wait for the explosion.

Clear the rubble. Repeat. A single round, one cycle of drilling, blasting, and clearing, might advance the tunnel face by eighteen inches. Maybe two feet, if the rock cooperated.

The Summit Tunnel was being attacked from both ends and from a central shaft sunk from above. Even working from four faces at once, progress was measured in feet per week. The drilling crews worked in teams of three. One man held the steel drill, a long iron rod with a chisel tip.

The other two swung sledgehammers in alternating rhythm. Strike. Turn the drill a fraction. Strike again.

Hour after hour. The noise in the confined tunnel was deafening, the ringing of steel on steel echoing off the granite walls. The air was thick with rock dust that coated the lungs and left a man coughing blood by the end of a shift. The men worked by candlelight or oil lamps.

Ventilation was poor, and the smoke from the lamps mixed with the dust, making it hard to breathe. This was all before the blasting. Once a series of holes had been drilled, usually six to ten per round, the blasting crew took over. Black powder was packed into the holes using wooden tamping rods.

A fuse was inserted. The fuses were cut to length based on how much time a man needed to get clear, usually sixty to ninety seconds. But fuses were unpredictable. They could burn fast or slow.

They could sputter out, or they could burn faster than expected. The blasting crew would light the fuses, starting with the ones farthest from the tunnel entrance, then work their way back, lighting each in sequence. Then they ran out into the open air and waited. The blasts were violent.

The confined space of the tunnel amplified the shock wave. Even outside, a man could feel the concussion in his chest. Inside, if you were caught, the blast could rupture your lungs, shatter your eardrums, or bury you under tons of rock. Premature explosions killed men.

A fuse burning faster than expected. A spark from a hammer strike igniting loose powder. In September 1866, a premature blast in the Summit Tunnel killed four Chinese workers instantly. Their bodies were buried under rubble.

It took two days to dig them out. The company records listed them as Chinese laborers, names unknown. They were buried in a mass grave near the tunnel entrance. Work resumed the next day.

After each blast, the clearing crews moved in. Rubble, broken rock, and granite fragments had to be removed before the next round of drilling could begin. This was done by hand. Men with shovels and wheelbarrows loaded the rock into small carts, pushed them out of the tunnel on temporary rails, and dumped the contents over the side of the mountain.

A single blast might produce twenty or thirty tons of rubble, all of which had to be cleared before progress could continue. Shovel, load, push, dump, repeat. Shift after shift. The Summit Tunnel took over two years to complete.

Two years of round-the-clock drilling, blasting, and clearing. And that was just one tunnel. There were fourteen others, some shorter, some nearly as long. Each required the same process, the same labor, the same risk.

The men doing this work were paid thirty dollars a month, about a dollar a day. White workers got thirty-five a month plus room and board. Chinese workers bought their own food. They lived in camps near the work sites, crude shelters built from scrap lumber and canvas, and cooked their own meals, usually rice and dried fish, over open fires.

In the winter, when the snow was twenty feet deep, the camps were buried. The workers lived and worked in tunnels dug through the snow. Some of these snow tunnels collapsed, burying men alive. The bodies were not recovered until spring.

The winter of 1866 to 1867 was one of the worst on record. Snow fell continuously from November through March, and at the summit the snowpack reached forty feet in places. Avalanches were constant. An avalanche gave no warning.

One moment the snow was stable, the next the entire slope was sliding, carrying men, equipment, and camps with it. In February 1867, an avalanche swept through a Chinese labor camp near Donner Pass. The camp was gone in seconds, buried under thirty feet of compacted snow. The records are unclear on how many men were in the camp.

Estimates range from twenty to forty. Their bodies were not recovered. When the snow melted in June, the remains were found scattered across the slope. They were buried where they were found.

No markers. No names. The work did not stop. The Central Pacific kept pushing.

More workers were brought in. The camps were rebuilt. The tunnels were advanced foot by foot. And slowly, impossibly, the railroad took shape.

East of the summit, the terrain opened up, and the work shifted from tunneling to grading. Grading meant creating a level roadbed for the tracks. In flat terrain, that was simple. You cleared the brush and laid the ties.

But in the mountains and across Nevada, the terrain was anything but flat. The roadbed had to be cut into hillsides, built up across gullies, and bridged over canyons. Cutting a roadbed into a hillside was done with picks and shovels. A crew marked the line of the grade, then started digging.

On the uphill side, they cut into the slope to create a level shelf. On the downhill side, they built up a retaining wall using the excavated material. If the slope was steep, the retaining wall had to be reinforced with timber or stone to keep it from collapsing. A crew of fifty men might advance the grade a few hundred feet in a day, and this was happening across hundreds of miles.

The Chinese workers excelled at this work. They built retaining walls that are still standing today, a hundred and fifty years later: dry stone walls fitted together without mortar, designed to flex and settle without collapsing. They graded roadbeds on slopes where a misstep meant a fall of hundreds of feet. They worked roped together, lowered from above, chipping footholds into the rock and hauling material up and down using pulleys and woven baskets.

The methods were the same ones they had used building terraces in the mountains of southern China. Adapted to the Sierra Nevada, they worked. On the flatlands of Nevada, the challenge was different. The terrain was desert.

Alkaline soil. No water. Summer temperatures exceeding a hundred and ten degrees. The workers, still predominantly Chinese, graded hundreds of miles of roadbed across this wasteland.

They lived in temporary camps that moved with the work. Water had to be hauled in by wagon from distant wells. Food supplies came by wagon train from Sacramento, a journey that took weeks. The camps were brutal: dust storms, scorpions, rattlesnakes, and the heat.

Men died from heat stroke, from dehydration, from accidents. The company kept no detailed records of the deaths. The exact number is unknown. Estimates based on scattered reports and later investigations suggest that over a thousand Chinese workers died during construction of the Central Pacific line.

Some from accidents, some from disease, some from exposure. Their graves, if they were buried, are lost. While the Central Pacific clawed its way east through the mountains, the Union Pacific was racing west across the plains. Its labor force was predominantly Irish immigrants, Civil War veterans, and freed slaves.

Their challenges were different but no less brutal. The plains were flat, but they were also empty. No trees for timber. No stone for ballast.

Everything had to be hauled in. The Native American tribes, the Lakota, the Cheyenne, the Pawnee, saw the railroad as an invasion. They were right. The railroad brought settlers, soldiers, and buffalo hunters who would destroy the herds the tribes depended on.

The tribes fought back. They raided work camps, tore up rails, and attacked supply trains. The Union Pacific hired guards, former soldiers, to protect the workers. Construction became a slow-moving war.

The grading crews on the Union Pacific faced their own dangers. Accidents with black powder. Floods that washed out miles of roadbed. Harsh winters on the high plains, where temperatures dropped below zero and the wind cut through clothing like a blade.

Men froze to death in their tents. Others died from disease. Cholera and dysentery spread through the camps, killing dozens. The company pushed forward.

The competition between the two railroads was fierce. Every mile of track meant money, land grants from the federal government, and prestige. By 1868, both were making rapid progress. The Central Pacific had cleared the Sierra Nevada and was laying track across Nevada at a rate of over a mile per day.

The Union Pacific was pushing through Wyoming, heading toward Utah. The two lines were converging. The race to finish became a national spectacle. Newspapers covered it.

Bets were placed on where the lines would meet. The workers, aware the project was nearing completion, pushed harder. On April 28, 1869, the Chinese crews on the Central Pacific set a record. In a single day, they laid ten miles of track.

Ten miles. Over three thousand ties placed. Over twenty-five thousand spikes driven. Fifty thousand pounds of rail lifted, positioned, and spiked down.

The feat required coordination, speed, and endurance that seems impossible. But it happened. The record stood. The two railroads met at Promontory Summit, Utah, on May 10, 1869.

A crowd gathered: dignitaries from both companies, photographers, reporters. The ceremony featured speeches, handshakes, and the driving of a golden spike to symbolize the completion of the transcontinental railroad. The photographs from that day show well-dressed men in suits posing in front of the locomotives. What the photographs do not show are the Chinese workers.

They were not invited to the ceremony. Despite having built more than half the Central Pacific line, despite having done the hardest and most dangerous work, they were excluded. The official narrative erased them. The celebration belonged to the investors, the engineers, and the white workers.

The Chinese went back to their camps, packed their tools, and dispersed. Most returned to California. Some stayed and found work maintaining the line. Others moved on to new construction projects.

Their contribution was forgotten for decades. Yung Wing, Hung Wah, Chin Lin Soo: these are three of the very few names recorded of the thousands who built the railroad. Most were listed only as Chinese laborers in company records. No first names.

No ages. No hometowns. When they died, they were buried in mass graves, or their bodies were shipped back to China if the family could afford it. The Central Pacific kept minimal records of these deaths.

There was no legal requirement to report them. No oversight. No accountability. The men were expendable, and they knew it.

The construction of the transcontinental railroad killed an estimated 1,500 to 2,000 workers. The exact number will never be known. The companies kept no comprehensive records. The graves are scattered across a thousand miles of mountains, plains, and desert.

Some are marked. Most are not. The railroad they built changed the United States. It connected the coasts.

It made travel that had taken six months by wagon possible in six days by train. It enabled the settlement of the West. It moved goods, people, and ideas faster than ever before. And it was built almost entirely by hand.

The tools were simple: shovels, pickaxes, sledgehammers, wheelbarrows, hand drills, black powder. No steam shovels. No mechanical excavators. The first steam-powered construction equipment would not appear for another decade.

Everything, every cubic yard of dirt moved, every foot of tunnel blasted, every rail spike driven, was done by human muscle. The scale is staggering. Over twenty million cubic yards of earth were moved during the construction of the Central Pacific line alone. That is enough to fill a trench ten feet deep and ten feet wide from San Francisco to New York, moved one shovelful at a time.

The trestles, wooden bridges carrying the tracks over canyons and ravines, were built using timber hauled in from hundreds of miles away. Some stood over a hundred feet high, built on slopes where a misplaced timber could send the whole structure collapsing. The Chinese workers built them with mortise-and-tenon joints, wooden pegs, and hand-cut timbers. Many of the trestles were later replaced with stone or steel, but some of the original wooden structures stood for decades.

The Summit Tunnel was finally completed in November 1867, after two years of continuous work. When the final blast broke through, connecting the east and west faces, the alignment was nearly perfect. The two bores, started from opposite sides of the mountain and guided only by surveying and mathematics, met with less than two inches of error over 1,659 feet. It was a triumph of engineering, built by men working with hand drills and black powder.

The human cost of that triumph was written in bodies. The Central Pacific estimated that over a thousand Chinese workers died during construction. That is one death for roughly every mile of track. The Union Pacific’s toll was lower, estimated at four to five hundred, but still significant.

These were not random accidents. They were the result of pushing men to work faster than was safe, in conditions that were inherently dangerous, with no safety equipment and no oversight. The companies knew men would die. They accepted it as a cost of doing business.

The workers had no choice. For the Chinese immigrants, the railroad was one of the few employers willing to hire them. Anti-Chinese sentiment was pervasive in California. They were excluded from most trades, barred from testifying in court, and subject to violence and discrimination.

The railroad offered wages, however meager, and the possibility of survival. For the Irish workers on the Union Pacific, the situation was similar. Fleeing famine and prejudice, they took the work because there was nothing else. The freed slaves who worked on the line were escaping the sharecropping system of the postwar South.

The railroad was brutal, but it paid cash. For men with no other options, that was enough. The legacy of the transcontinental railroad is complicated. It was an engineering marvel.

It transformed the economy. It enabled the growth of cities, the expansion of agriculture, and the industrialization of the West. But it was also built on exploitation, on the labor of men treated as disposable, and on the destruction of Native American lands and ways of life. The railroad brought settlers who displaced the tribes.

It brought buffalo hunters who slaughtered the herds to near extinction. The tribes knew what the railroad meant. They fought it. They lost.

The physical remnants of the construction are still visible. In the Sierra Nevada, you can hike to the sites of the old tunnels. Some are still in use, widened and reinforced, still carrying modern freight. Others are abandoned, sealed off, being reclaimed by the mountains.

The roadbed, the graded shelf cut into the hillsides, is still there, overgrown with trees and brush, recognizable to anyone who knows what to look for. The retaining walls built by Chinese workers a hundred and fifty years ago are still standing, stones fitted so precisely they have not shifted. In Nevada and Utah, the old grade is visible from the air, a scar running across the desert parallel to the modern tracks. The wooden ties have long since rotted.

The rails were salvaged and reused. The shape of the roadbed remains. And scattered along the line are the graves: small markers, forgotten cemeteries, piles of stones in the desert, places where workers were buried where they fell and never moved. Some of these graves have been located and documented by historians and archaeologists.

Most have not. The engineers who designed the transcontinental railroad are remembered. Theodore Judah, Grenville Dodge: their names are on plaques and monuments. The investors, the Big Four, Leland Stanford, Collis Huntington, Mark Hopkins, Charles Crocker, made fortunes and founded universities.

Their names are on buildings across California. But the workers, the men who actually did the building, are mostly forgotten. There are a few monuments. In 2014, the U.

S. Department of Labor inducted the Chinese railroad workers into the Labor Hall of Honor. A plaque was placed. Speeches were made.

But for over a century, their contribution was erased. Historians are working to recover the stories: oral histories from descendants, fragmentary company records listing work crews and casualties, archaeological work at the old campsites uncovering artifacts, tools, personal items. Slowly, the picture is being filled in. But much is lost.

The workers who survived rarely spoke about the experience. It was just work. Hard, dangerous work. You did it.

You survived. You moved on. There was no expectation of recognition or gratitude. And for over a century, there was none.

The transcontinental railroad is still in use. The route has been modified, tunnels improved, grades eased. But the bones of the original line are still there. Freight trains carrying goods from the ports of California to the markets of the East still follow the path carved out by Chinese and Irish laborers in the 1860s.

The infrastructure they built has carried commerce for over a hundred and fifty years, built without bulldozers, without excavators, without any of the machinery considered essential to construction today. Just hand tools, black powder, and human labor pushed to the absolute limit of endurance. The men who built it did not expect to be remembered. Most of them probably did not think what they were doing was remarkable.

It was a job. It paid. It was brutal and dangerous, but so was everything else available to men with no education, no capital, and no connections. They did the work because it needed doing, and they were the ones willing to do it.

They moved millions of tons of rock and dirt. They blasted fifteen tunnels through the Sierra Nevada. They graded a roadbed across a thousand miles of mountains, plains, and desert. They laid over seventeen hundred miles of track, and they connected a nation.

The cost was over fifteen hundred lives. The legacy is the railroad. And the lesson, if there is one, is that the infrastructure we depend on, the systems we take for granted, were built by people whose names we do not know, doing work we can barely imagine, for wages that barely kept them alive.

They built America with shovels, hand drills, and their own two hands.