Does H20 = Growth in Arizona? That is how many people view the water-growth equation -- any introduction of "new" water supplies inevitably stimulates population growth and economic activity. However, the report by Morrison Institute for Public Policy, Growth on the Coconino Plateau, offers some surprisingly contrary conclusions. Completed on behalf of Arizona Department of Water Resources and the Coconino Plateau Watershed, this document is relevant for all regions of rural Arizona. Among the findings: - Some rural areas in the West have constructed major water supply projects only to see most of their towns languish, not prosper. - New water infrastructure in growing rural counties hasn't affected the size so much as the pattern of new development. - Leapfrog sprawl into unincorporated areas has been discouraged in regions where cities and towns hold control over the distribution of new water supplies. Bottom line, water won't automatically produce population growth. But planning for water - how it is supplied and governed - does offer a useful tool for managing future growth. Moreover, it can provide some measure of protection for the environment. We believe this report has important application well beyond northern Arizona. By providing original research and analysis on the water-growth equation, this report helps resolve one of Arizona's most critical issues. As a result, public policy discussions in the future will be able to focus on the state's most important growth drivers and how they can be managed.

Arizona is one of the nation’s most urban states, and now it includes one of 20 “megapolitan” areas in the U.S. People have predicted for 50 years that Phoenix and Tucson would grow together into a giant desert conglomerate. That possibility has been seen as exciting, intriguing, and distressing. While a solid city along Interstate 10 is unlikely given the diverse land ownership in central and southern Arizona, the two metro economies are already merging.

Megapolitan: Arizona’s Sun Corridor, one of the first reports on a single megapolitan area, recognizes a more sophisticated technique for analyzing urban growth—that shared economic and quality of life interests are more important than physically growing together.

Scholars at Virginia Tech defined the megapolitans based on economic and growth patterns.
The Sun Corridor, which cuts across six counties from the border with Mexico to the center of Yavapai County, is the home of eight out of 10 Arizonans. In the next several decades, two out of three Americans will live in a megapolitan accounting for 60% of the population on only 10% of U.S. land.

Megapolitan offers a bold new picture of Arizona’s geography and its future opportunities and “megaton” challenges. This report presents a scenario for 2035 based on current trends. It analyzes the Sun Corridor and provides insights into the region’s global potential, water, governance, sustainability, and “trillion dollar questions.” It discusses the “tragedy of the sunshine” and asks the indispensable question: In 2035, do you want to live in the Sun Corridor?