The City of San Luis, located in the southwestern end of the state of Arizona, comprises part of an important industrial, agricultural and commercial area together along with San Luis Rio Colorado, Sonora, a zone considered to offer treat advantages for the commercial trade between the United States and Mexico. The city was established in 1930 with the opening of the U.S. Custom along the border crossing with Mexico, and in the last twenty years it has registered an accelerated population increase going from 1,946 inhabitants in 1980, to approximately 20,000 in the year 2000. The growth is due to a constant migration from Mexico and California, productive activities in the border area and opportunities San Luis has to offer. The City annexed over 16,000 miles of land within the past six years. Therefore, increasing the availability of land for residential, commercial and industrial growth to the East part of town where the new commercial port of entry will be constructed.