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Zone B: Areas between the Special Flood Hazard Area and the limits of the SOa-year flood, including areas of the SOG-year flood plain that are protected from the IOO-year flood by dike, levee, or other water control structure; or, areas subject to certain types of 100- year shallow flooding where depths are less than 1.0 foot. Zone B is not subdivided. Zone C: Areas of minimal flooding. Table 2, "Flood Insurance Zone Data," summarizes the flood elevation differences, Flood Hazard Factors, flood insurance zones, and the base flood elevations for each flooding source studied in detail affecting Steamboat Springs. S.4 Flood Insurance Rate Map Description The Flood Insurance Rate Map for the Town of Steamboat Springs is, for insurance purposes, the principal result of the Flood Insurance Study. This map (published separately) contains the official delin- eation 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 (lOO-year) flood. This map is developed in accordance with the latest flood insurance map prepara- tion guidelines published by the Federal Emergency Management Agency. 6.0 OTHER STUDIES Unpublished flood hazard studies of a proposed subdivision development along the Yampa River between river miles 191.0 and 191.S were prepared by Dismuke and Dismuke, Inc.', Consulting Engineers, Steamboat Springs. The principal purpose of these studies was to determine levee heights required to contain a lOa-year flood. The difference between the 100-year design flood computed for the levee study and the base flood determined for this Flood Insurance Study was less than 2 percent. The profiles and river cross sections prepared for the proposed development, however, reflected a leveed condition and were not of value for the Flood Insurance Study. A Master Drainage Plan for Steamboat Springs (undated) was prepared by C.M. Engineering Associates, San Bernardino, California. The study included 25- and 100-year flow estimates for Fish and Burgess Creeks. Flow data for the drainage study were determined by the rational method for areas of less than 0.1 square mile and by the U.S. Soil Conservation Service regional analysis method for larger areas. Flow data developed for this Flood Insurance Study were in agreement with those presented in the drainage study for Fish Creek, but did not agree for Burgess Creek. Flow data developed for the Flood Insurance Study were used because the 36