An effort to create wetlands out of dry chaparral in the Arizona desert has begun two new phases of work to support emergent marshes completed last year.
The three-phase, $230-million Tres Rios Ecosystem Restoration and Flood Control Project is designed to improve a seven-mile-long section of the Salt and Gila rivers in southwestern Phoenix. The U.S. Army Corps of Engineers project is being built in coordination with the City of Phoenix.