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  • Tucson Drainage - Arroyo Chico Project

    Sep 08, 2014 | Read More News
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    Arroyo Chico Project MapOn September 8, 2014, Pima County was hit with a wide area storm event. An estimate of the severity of the event in the Arroyo Chico Basin rates it as a 50-year flood event, meaning the chance of a flood of that magnitude happening in a year is 1 in 50. The most intense rainfall occurred in central and east Tucson as well as the San Xavier District. This storm put to the test the Tucson Drainage/Arroyo Chico project and whether it would keep our neighborhoods safe. read more...