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Zone B: Areas between the Special Flood Hazard Areas ar~ the limits or the SOO-year flood, including areas of the SOO-year flood plain that are protected from the IOO-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 100- year flooding from sources with drainage areas less than 1 square mile. Zone B is not subdivided. Zone c: Areas of minimal flooding. Zone D: Areas of undetermined, but possible flood hazard. The flood elevation differences, Flood Hazard Factors, flood insur- ance zones, and base flood elevations for each flooding source studied in detail i~ the county are s~~rized in Table 3. 5.4 Flood Insurance Rate Map Description The Flood Insurance Rate Map for Eagle :ounty is, for i~surance 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 tte locations of the expected whole-foot water-surface elevations of the base (laO-year) flood. This map is developed in accordance with the latest flood insurance map prepa- ration guidelines pUblished by the Federal EUlergency Management Agency. 6.0 OTHER STUDIES Flood Insurance Studies have been conducted for the Towns of Eagle, Gypsum, Minturn, Redcliffr Vail, and Basaltr Colorado (References 19, 20, 21, 22, 23, and 24). All of these towns are contained in Eagle County. The results of these studies are consistent with the Eagle County Flood Insurance Study. In 1978, a Flood Plain Information report (Reference 10) for Roaring Fork and Fryingpan Rivers at the Town of Basalt was completed for the Colorado Water Conservation Board. Results of this report were used in determining flood boundaries and elevations for the Eagle County Flood Insurance Study. 24