The Casa Grande, a four-story caliche great house built by the ancestral Huhugam around 1350, standing under its protective steel canopy near Coolidge, Arizona.
Goldmoney10 / Wikimedia Commons (CC0)
History

The City on the Canals

Phoenix is the one American metropolis that means its own name literally — it rose from the ashes of an older city, re-dug the thousand-year-old canals its builders had left, and only outgrew them when twentieth-century concrete let it take more of the river than the ancestors ever could.

Phoenix sits on the bones of an older city — a metropolis re-dug on the thousand-year-old canals of the ancestral Huhugam, whose descendants, the Akimel O'odham, never left the valley. Casa Grande still stands; Roosevelt Dam finished what hand-dug canals could not.

By Open Road Guide·5 min read

Every city tells a founding story, but Phoenix is the rare one whose story is true in the plainest sense. The fifth-largest city in the United States sits on the bones of an older city, and it drinks from the same water the older city drank, along many of the same lines dug into the same ground. The name is not decoration. Phoenix was named for the bird that rises from the ashes because the men who named it were standing in the ashes when they said it.

Start a thousand years before the founders. The people archaeologists call the Hohokam — a label taken from the O'odham word Huhugam, "those who have gone" — farmed the Salt and Gila river valleys for something like fifteen centuries, and their descendants, the Akimel O'odham, the River People, do not use "Hohokam" as the name of a tribe. It was never a tribe. It was a way of living built on water. Beginning as early as the first centuries after Christ, with nothing but stone tools, digging sticks, and baskets — no draft animals, no metal, no wheel — these farmers cut a canal system across the desert that ran to roughly 135 miles of main lines in the Salt River Valley alone, some channels fifty feet wide and more than ten feet deep. They moved water for tens of miles across nearly flat ground, reading grades a modern surveyor would respect, and they fed a population that may have reached the tens of thousands. It was one of the largest irrigation works in the ancient Americas, and every foot of it was dug by hand.

You can still stand in the great house they left. At Casa Grande Ruins, an hour southeast of the city near the Gila, a four-story tower of caliche — the desert's own natural concrete, dug from the ground and puddled into walls four feet thick at the base — has stood for nearly seven centuries under the open sky. It went up around 1350, at the height of the culture, and its outer walls face the four directions while small openings in the upper rooms line up with the sun and moon at the turns of the year: very likely a calendar, a way to time the planting and the flood. The people left it around 1450, for reasons still argued — drought, flood, the sheer difficulty of keeping a hand-dug system alive as it silted and the river swung. When the Jesuit Padre Kino rode past in 1694, it was already a ruin, and he gave it the Spanish name it still wears. Its builders did not vanish. They became the O'odham, the Hopi, and the Zuni — and the O'odham never left the valley at all.

For four centuries the canals sat dry and forgotten, filling with flood debris. Then, in 1867, an ex-Confederate named Jack Swilling rode through, looked at the strange straight mounds crossing the desert, and understood exactly what they were. He formed a canal company, put crews to clearing the old Huhugam lines, and within a year water was running to new fields — grain for the mining camps at Wickenburg, hay for the Army at Fort McDowell. The settlement that grew around Swilling's ditch needed a name, and an eccentric, classically educated Englishman in the party, Darrell Duppa, supplied the one that stuck: a city would rise, phoenix-like, from the ruins of the one before it. He was not being poetic. The Anglo town was quite literally re-digging a dead city's veins.

But the founders' canals could only reach as far as the Salt River's own moods allowed, and the Salt is a river of extremes — bone-dry stretches and drowning floods. To make a modern city, the valley had to master the river itself, and that meant a dam. Under the new federal Reclamation Act, crews spent the first decade of the twentieth century raising Theodore Roosevelt Dam eighty miles upstream — for a time the tallest masonry dam in the world — and to reach the site they carved a road straight through the volcanic country east of the city. That road is the Apache Trail, and it is one of the few highways anywhere built for the sole purpose of building something else. It threads the crags of the Superstition Mountains, drops off Fish Creek Hill in a white-knuckle grade, and still runs — though the roughest stretch, torn out by a 2019 flood, reopened in 2024 as a primitive four-wheel-drive track. Roosevelt Dam was dedicated in 1911, the year before Arizona became a state, and it did what the ancestors never could: it held the river's floods back and metered them out, and the modern city grew past every limit the old canals had set.

That is the whole shape of the place. The ancestors watered a valley by hand and reached the edge of what hand-dug canals could hold. The founders reopened those same canals and reached the edge of what an untamed river would give. The dam broke both limits, and nearly five million people now live where two civilizations learned, in turn, that in this desert the only real question is who keeps the water moving. Much of the modern canal grid still follows the Huhugam routes; you drive over them without knowing it, every day, in Phoenix.

And the people who dug the first lines are still here to say so. At the Heard Museum in the city they built on, the Akimel O'odham and their neighbors tell the story in their own words rather than having it told about them — which is the right way to end a story about Phoenix. The city did not rise on empty ground. It rose on the ashes of a place whose descendants are still tending the fire.

Places in this story

Phoenix
Phoenix

The fifth-largest US city, built on the canals of a thousand-year-old one

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Heard Museum
Phoenix

The Native Southwest, told in the first person

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Casa Grande Ruins
Coolidge

The Huhugam Great House — and the country's first archaeological reserve

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The Apache Trail
Apache Junction

The 1904 road built to raise Roosevelt Dam, still barely tamed

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Superstition Mountains
Apache Junction

The volcanic range that holds the Lost Dutchman legend — and outlasts it

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