In the 1850s, the mud in the streets was deep enough to swallow a horse. The engineer who raised Chicago didn't try to pave over it. The city sat just two feet above the water level of Lake Michigan. When it rained, the water had nowhere to go. It sat in the streets. When the cholera came, it sat in the water.
Chicago, Illinois, in 1854 was a grid of wooden planks floating on a swamp. The population was exploding, doubling every few years as the railroads connected the coasts. The physical geography could not support the human weight. Chicago was built on a sandbar and a wetland. When wagons rolled down Lake Street, they didn't just get muddy. They sank to their axles in the spring thaw. Horses broke their legs in the deep ruts. Pedestrians crossed intersections by walking on loose, untreated boards tossed haphazardly over the muck.
The boards warped in the summer heat. They splintered under the heavy draft wagons. Underneath the wood, the city’s waste pooled in stagnant trenches. The drinking water was pulled directly from the lake. The waste drained directly back into the same lake.
During the epidemic of 1854, the death toll broke the city's ability to function. Six percent of the population died in a single twelve-month window. Funerals ran continuously from sunrise to sunset. The city cemetery filled faster than graves could be dug in the marshy soil. Water seeped into the open trenches before the wooden coffins could even be lowered.
The city council formed a Board of Sewerage Commissioners in a state of panic. They hired Ellis Chesbrough.
He arrived from Boston in 1855. He was a quiet, practical man. He had designed the Cochituate aqueduct. He understood how water moved. He surveyed the grid and saw that the problem was gravity.
Water flows down. Chicago was completely flat. To build the first comprehensive sewer system in America, he needed a slope. He needed gravity to carry the waste away from the people.
At the time, the 1848 Public Health Act in London was the global standard for urban sanitation. It mandated covered brick drains, but left existing building elevations intact. Cities facing similar crises in the mid-19th century focused entirely on chemical treatment or pushing water intake pipes deeper into their reservoirs. Chicago's municipal charter made no legal provision for altering the physical geography of private property.
Chesbrough did the math. If he dug trenches deep enough to create a downward slope, he would hit the lake’s water table within three feet. The trenches would fill with groundwater before a single pipe could be laid.
It was physically impossible to dig down. If he couldn't go down, there was only one direction left.
He submitted his plan to the city council in 1856. He proposed laying the sewer pipes directly on top of the existing streets. Once the pipes were connected, he would cover them with massive amounts of dirt dredged from the river.
The new streets would sit four to fourteen feet higher than the original ground level.
The plan would turn the front doors of every business into basements. The ground floors would become cellars. Property owners revolted at the expense and the disruption. The city approved the plan anyway.
The dirt arrived first. Wagons dumped thousands of tons of earth onto the streets, burying the pipes. Pedestrians had to navigate a bizarre, fractured landscape. The new streets were ten feet higher than the existing sidewalks. People crossed intersections by climbing temporary wooden staircases.
Chesbrough's preliminary engineering sketches showed a complete disregard for the chaos this caused the residents. He focused entirely on the pipe gradients and the mathematical flow of the water, leaving shop owners to build their own makeshift wooden bridges over the mud just to keep their businesses alive.
Then came the mechanics of survival. The buildings were now sitting in pits next to elevated roads. They had to be moved up to meet the new street level.
They did not empty the buildings.
In 1860, a team of engineers targeted the Tremont House.
Six stories tall. Solid brick and masonry. A footprint covering an entire city block. Thirty-five thousand tons of dead weight. The crown jewel of the Chicago grid.
Laborers dug down to the foundation. They slid five thousand steel jackscrews underneath the load-bearing walls.
The mechanics of the lift required absolute mathematical precision. If one section of the building rose faster than another, the masonry would crack. The structural integrity would fail, and thousands of tons of brick would collapse onto the workers below.
They needed a unified rhythm.
Six hundred men climbed into the trench. They stood shoulder to shoulder in the cold mud, in near darkness, holding heavy iron wrenches. A whistle blew. Every man turned his assigned screws exactly one-quarter turn. The massive brick walls groaned. The timber cribbing settled. The whistle blew again. Another quarter turn.
The hotel moved upward by a fraction of an inch. Inside the building, life continued. Guests slept in their beds. Cooks prepared meals in the kitchen. Diners ate at tables with full glasses of water. Not a single pane of glass shattered. Over five days, the six-story hotel rose vertically into the air.
They lifted it a total of six feet. Masons built new brick foundation walls in the expanding gap underneath. When the new foundation was secure, they removed the jackscrews.
They repeated this process across the entire downtown grid. Entire blocks of stone and brick rose simultaneously. Sometimes an entire row of shops was lifted at once, the owners keeping their doors open while the floor beneath them detached from the earth.
In 1868, they raised a block of buildings on Lake Street. The buildings went up.
In 1869, they raised a massive brick structure on Water Street. The building went up.
In 1870, they raised an entire block of businesses on Clark Street. The buildings went up.
They didn't try to cure the swamp. They just moved the city away from it.
The cholera deaths plummeted. The gravity-fed pipes worked. The waste flowed away from the drinking water.
If you walk through downtown Chicago today, there are still places where the modern sidewalk drops suddenly, or a set of heavy stairs leads down to a doorway that used to be ground level.
The original first floors are still down there. The city is still hovering above the swamp it was built on. The jackscrews are gone.
Ellis Chesbrough: the man who lifted a city out of the mud.
Source: Chicago Board of Public Works Annual Reports (1861-1865). Verified via: The Chicago History Museum, American Society of Civil Engineers Archives. (Some details summarized for brevity.)
------------------------------------------------ I knew Chicago was lifted from the mud, but this is the first time I have seen the story about it. Quite a wild bit of history.
on April 13, 2026, 7:06 pm
