Water flows into a wash which is part of the Arroyo Chico Drainage Area/Arroyo Chico Multi-Use Project built by the U.S. Army Corps of Engineers Los Angeles District during a Sept. 8 rain event in Tucson. Pima County Administrator Chuck Huckelberry sent the L.A. District leadership a letter of appreciation thanking the District for the project because it kept the rain from flooding the downtown Tucson area.