The Colorado River Reclamation Projects (CRRP) collection provides detailed information and photo documentation on four projects: the Yuma Project, the Yuma Auxiliary Project, the Gila Project, and the Parker-Davis Project. It documents the “taming” of the Colorado River in the largest irrigation project ever attempted in the U.S. Bureau of Reclamation (BOR) initiatives on the Lower Colorado River were developed to deliver water consistently and safely to Southwestern and Central Arizona, Southeastern California and Mexico and provided electrical power to Arizona, California, and Nevada. The water harnessed and diverted as result of these projects opened up large and prosperous agriculture land in Arizona and Southern California. It also provided water and electrical power to settlers and businesses in the Southwest.