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Zone B: Areas between the Special Flood Hazard Areas and the limits of the 500-year flood, including areas of the 500-year flood plain that are protected from the lOO-year flood by dike, levee, or other water concrol structure; also areas subject to certain types of lOa-year shallow flooding where depths are less than 1.0 foot; and areas subject to lOO-year flooding from sources with drainage areas less than 1 square mile. Zone B is not subdivided. Zone c: Areas of minimal flooding. The flood elevation differences, Flood Hazard Factors, flood insur- ance zones, and base flood elevations for each flooding source studied in detail in the community are summarized in Table 3. 5.4 Flood Insurance Rate Map Description The Flood Insurance Rate Map for the Town of Pierce is, for insurance purposes, the principal result of the Flood Insurance Study. This map (published separately) contains the official delineation of flood insurance zones and base flood elevation lines. Base flood elevation lines show the locations of the expected whole-foot water- surface elevations of the base (lOa-year) flood. This map is developed in accordance with the latest flood insurance map prepara- tion guidelines published by the Federal Insurance Administration. 6.0 OTHER STUDIES The Federal Insurance Administration previously published a Flood Hazard Boundary Map for the Town of pierce (Reference 12). This Flood Insurance Study is more detailed and thus supersedes that map. This study is authoritative for the purposes of the National Flood Insurance Program; data presented herein either supersede or are compatible with all previous determinations. 7.0 LOCATION OF DATA Survey, hydrologic, hydraulic, and other pertinent data used in this study can be obtained by contacting the office of the Federal Insurance Administration, Regional Director, Room 311, 909 17th Street, Denver, Colorado 80202. 12