The Altar Valley Conservation Alliance is a collaborative conservation organization founded in 1995, and incorporated as a 501(c)3 not-for-profit organization. Just southwest of Tucson, Arizona, the Altar Valley comprises approximately 610,000 acres of Sonoran desert grassland, some of the most biologically rich and ecologically threatened biotic communities in the world. Private ranches work side by side with federal, state and local agencies to manage the valley, which is the largest unfragmented watershed in Pima County, outside of the Tohono O’odham Nation to the west. This collection is an archive of reports and other documents specific to Alliance activities.
Brawley Wash Rapid Watershed Assessment Figures
USDA Natural Resources Conservation Service - Arizona
University of Arizona, Water Resources Research Center
This document includes maps of vegetation cover, precipitation, land ownership, air quality, and other landscape components in the Altar Valley from the Rapid Watershed Assessment (RWA) for the Brawley Wash. The RWA report contains quantitative and qualitative information on natural resource conditions within the watershed. This information has been used to develop a watershed profile and to determine the conservation needs of the area.