You do not see the water main and the not seeing is the water main working. The water main is underground. The water main has always been underground because the water must be protected from the surface and the surface has dirt and sewage and weather and the dirt and sewage and weather would contaminate the water and the contaminating the water would kill the city. The water main is a pipe. The pipe is cast iron or ductile iron or concrete or steel and the pipe carries water from the treatment plant to your faucet and the carrying from the treatment plant to your faucet is the journey and the journey is invisible. You turn the handle and the water comes out and the coming out is the water main delivering.

New York City has six thousand eight hundred miles of water mains and the six thousand eight hundred miles is the circulatory system of a city of eight million. The oldest water mains in New York were laid in the eighteen forties when the Croton Aqueduct brought water from Westchester to Manhattan and the bringing water from Westchester to Manhattan required mains under the streets to distribute the water and the distributing the water under the streets was the beginning of the system that every New Yorker takes for granted. The mains run under every street. The mains run under Broadway and under Fifth Avenue and under the Grand Concourse and under streets whose names you have never heard and the running under streets whose names you have never heard is the democracy of the water main which is that every street gets water. Six thousand eight hundred miles of pipe. If you laid the water mains of New York City end to end they would reach from New York to Los Angeles and back.

The water main under Flint Michigan carried lead into the drinking water for eighteen months and the carrying lead was the infrastructure betraying the city it served. In twenty fourteen the city of Flint switched its water source from the Detroit system to the Flint River and the switching to the Flint River saved money and the saving money corroded the pipes and the corroding the pipes leached lead into the water and the lead in the water poisoned the children. The water main did not fail. The water main did exactly what a water main does which is carry whatever is in it to wherever it goes. The failure was the decision to put corrosive water into old lead pipes and the decision to put corrosive water into old lead pipes was made by people who did not drink the water. The water main in Flint is the proof that infrastructure is not neutral. The water main carries whatever the city puts into it. The city put lead into it. The water main carried the lead to the children.

In London the water mains laid by the Metropolitan Water Board in the Victorian era are still in service and the still in service means pipes laid in the eighteen sixties carry water to homes built in the twenty twenties. The Victorian mains are cast iron and the cast iron has lasted a hundred and sixty years because cast iron lasts and the lasting is the Victorian engineering that modern cities still depend on. But the mains break. The mains break because iron corrodes and the ground shifts and the traffic vibrates and the vibrating and shifting and corroding weaken the pipe and the weakened pipe bursts and the bursting is the water main break and the water main break is the geyser in the street and the geyser in the street is the city's blood escaping.

You see the water main break on the evening news and the water main break is a geyser shooting thirty feet into the air and the geyser shooting thirty feet is the pressure and the pressure is sixty pounds per square inch and the sixty pounds per square inch is the force that pushes water from the main through your pipes to your faucet on the fourth floor. The break floods the street. The break closes the road. The break means a crew works through the night to clamp the pipe or replace the section and the replacing the section means digging a hole in the street and the digging a hole in the street is the excavation that reveals the pipe and the revealing the pipe is the only time you see the water main. The water main. The invisible pipe. The underground river. The six thousand eight hundred miles of iron and steel that carry the water that keeps the city alive. Underground. Unseen. Delivering. Right now.