Colorado River seen as depleting regional resource

Scientists with the USGS Grand Canyon Monitoring and Research Center monitor water quality during the high-flow release of water into the Colorado River at Lees Ferry, Ariz.,  in Marble Canyon Tuesday Nov. 20, 2012. Federal water managers started a 5-day  Photo by
Scientists with the USGS Grand Canyon Monitoring and Research Center monitor water quality during the high-flow release of water into the Colorado River at Lees Ferry, Ariz., in Marble Canyon Tuesday Nov. 20, 2012. Federal water managers started a 5-day Photo by
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