1998. This dataset provides a locational map of 2,471 dams in Arizona, California, Colorado, Idaho, Nevada, New Mexico, Oregon, and Utah. The National In... United States Environmental Protection Agency.
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1998. The ECOREG coverage provides polygon coverage of the Level III ecoregions for the conterminous United States. The ecoregions shown here have been d... United States Environmental Protection Agency.
1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, and 2001. Depiction of robbery by county from 1990-1999 & 2001. Rates are per 100,000 persons. Rates are calculated using the population estimate for the yea... Arizona Department of Public Safety.
1998. This feature contains groundwater Sub-basin boundaries and provides base information for use in GIS systems to aid in assessment for a variety of p... Arizona Department of Water Resources.
1998. This dataset consists of Arizona Department of Water Resources's (ADWR) watersheds. Arizona Department of Water Resources.