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?

“What about the water?” was one of the questions Morrison Institute for Public Policy asked in its 2008 study, "Megapolitan: Arizona’s Sun Corridor". That report looked at the potential growth of the Sun Corridor as Tucson and Phoenix merge into one continuous area for economic and demographic purposes.

With its brief review of the water situation in urban Arizona, "Megapolitan" left a number of questions unanswered. This report will consider questions like these in more detail in order to examine the Sun Corridor’s water future. This topic has received less sophisticated public discussion than might be expected in a desert state. Arizona’s professional water managers feel they are relatively well prepared for the future and would like to be left alone to do their job. Elected officials and economic-development professionals have sometimes avoided discussing water for fear of reinforcing a negative view of Arizona. This report seeks to contribute to this understanding, and to a more open and informed conversation about the relationship of water and future growth.

The purpose of this paper is to consider alternative assured water supply approaches for Superstition Vistas and to describe potential methods of providing water service to the property. Because this paper represents a cursory analysis of the study area and available supplies, the results should only be used for scoping more detailed planning efforts. The first issue examined is whether sufficient water supplies exist regionally to support projected growth including Superstition Vistas. Additionally, estimated demands for the property are presented. Finally, there a number of issues that complicate the process of acquiring supplies for an area like Superstition Vistas. This paper summarizes some of those issues.

Both the effect of climate change on our future water supply and the size of the population that will need to share in that supply are uncertainties that water planners must consider when making decisions regarding our future. We have options, but we have to be sure that we use water efficiently to meet our urban, agricultural, and environmental needs. This Policy Points offers a clear, succinct overview of the status of Arizona’s water supply and what the current drought really means for water availability.

Arizona is now entering a new era of water challenges prompted by the need to consider, confront, and find solutions to predicted water supply, and demand imbalances in the future. This paper by water attorney M. Byron Lewis discusses studies predicting water supply limitations, possible sources of augmentation of Arizona’s water supply discussed in those studies, and significant legal and political challenges to overcome in finding solutions to supply and demand imbalances.

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.