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USGS – A Century of Watching the Colorado River

https://www.usgs.gov/news/a-century-watching-colorado-river Release Date: SEPTEMBER 22, 2021 Right where the Colorado River flows into the mouth of the Grand Canyon, an inconspicuous 20-foot-high concrete tower rises from the riverbank.   Inside the tower

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World Car Free Day

Pima County Celebrates Car Free Day by Hosting Mini-Fairs PIMA COUNTY, September 20, 2021–World Car Free Day is this Wednesday, September 22nd, and the Pima

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