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Zone B: Areas between the Special Flood Hazard Areas and the limits of the SOO-year flood, including areas of the SOO-year flood plain that are protected from the lOa-year flood by dike, levee, or other water control structure; also areas subject to certain types of IOO-year shallow flooding where depths are less than 1.0 foot; and areas subject to IOO-year flooding from sources with drainage areas less than I 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 Dacono is, for insurance purposes, the principal result of the Flood Insurance Study. This map 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 preparation guidelines published by the Federal Insurance Administration. 6.0 OTHER STUDIES No other flood plain delineation studies have been made for the Town of Dacano, but two drainage studies have been completed in the area. A drainage study was done for the Glens of Dacono, a trailer park located in the eastern half of Dacono (Reference 9). Discharges in this Flood Insurance Study are consistent with those published in the drainage report. The other study (Reference 10) was completed for the county, and the values in that report are also consistent with those used in this Flood Insurance Study. This study is authoritative for the purposes of the National Flood Insur- ance Program; data presented herein e~ther supersede or are compatible with all previous determinations. 10