http://www.hcn.org These are the search results for the query, showing results 1 to 1. http://www.hcn.org/issues/281/14963 Groundwater pumping in the Sierra Vista area may be already reducing water flow to the San Pedro River No publisher Tony Davis Sierra Vista Arizona hydrology groundwater Don Pool U.S. Geological Survey pumping Rivers Water Resources U.S. Army Corps of ecology San Pedro River dro Julie Stromberg Arizona Department of aquifers Engineers Mark Anderson irrigated agriculture 2012-04-25T17:58:28Z News Article