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37 historic photos of the Santa Cruz River through Tucson

37 historic photos of the Santa Cruz River through Tucson

The Santa Cruz River was the lifeblood of Tucson for early Native Americans, the Spanish Conquistadores and early American settlers. It languished for years and became dry most of the year as the water table dropped. It also became a neglected trench and trash heap. City leaders envisioned something better. By the early 1970s, the Army Corps of Engineers was studying the feasibility of channeling the river and creating a park. In 1977, work began. It is now a lush part of downtown and an integral part of The Loop bicycle and pedestrian trails.

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The river actually benefits from dry weather, which causes algae to bloom in parts of it. That blocks infiltration of the city's reclaimed water into the aquifer, letting it flow farther downriver even though Tucson Water isn't releasing any more water than before.

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