FP_DFIRM shows areas in Pima County prone to 100-year and shallow 100-year flood events. ZONES A, AE, AH, AO # and AO - ALLUVIAL FAN # comprise the extent of the 100-year floodplain. The tailing numbers in the ZONE AO strings indicate flood depth in feet. ZONE D shows areas that have not been mapped by FEMA (primarily federal and tribal lands). Zone X shows areas that have been mapped but are outside of the 500-year floodplain. ZONE X -SHALLOW 100-YEAR shows the extent of the shallow 100-year floodplain, the 500 year floodplain and Areas protected by levee. The layer FP_ZONEX provides subclassifications for these areas. Note, FP_LOMX can be used to augment FP_DFIRM for large-scale mapping. Also note, FP_DFIRM should be used in conjunction with FP_SS for the floodprone land brochure mailings sent out by PCRFCD on an annual basis. For general FIRM information: Known Errors/Qualifications: A composite of FEMA maps with different scales and years. Spatial Domain: Pima County Rectified: quads Maintenance Organization: PC ITD GIS Maintenance Description: RFCD gets digital files from FEMA, Baker or from other firms, by case number, and gives them to Mary Beth Clark to update the geodatabase. The contents of the geodatabase are exported nightly by Jeff McConnell's GDBtoSHP scheduled job. Maintenance Frequency: Varies Maintenance Format: Enterprise GDB Primary Source Organization: Michael Baker Jr. Corp. Primary Source Contact: Michael Garner 703.960.8800 x3031 Primary Source Date: 20031002 Primary Source Format: Geodatabase Secondary Source Organization: FEMA Secondary Source Date: 2004 Secondary Source Format: Shape GIS Contact: Mary Beth Clark