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.
Roads: A History of Erosion and Dewatering of the Arid Southwest
Rangeland Hands, Inc.
In this letter, Steve Carson gives a brief overview of the history of roads in the West and the role they have played in altering watershed dynamics. With the widespread damage to watersheds that poor road construction has caused as a backdrop, Carson emphasizes the importance of proper placement and design of roads and presents road drainage improvements as a cost effective treatment to restore watersheds.