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The U.S. Army Corps of Engineers has prepared a Flood Hazard Information Hydrology report on Gunnison, North Fork Gunnison, and Uncompahgre Rivers (Reference 10). Discharge values used for Gunnison, North Fork Gunnison, and Uncompahgre Rivers in this Flood Insurance Study were obtained from that report. ~ The U.S. Army Corps of Engineers has prepared Flood Hazard Information reports covering Gunnison, North Fork Gunnison, and Uncompahgre Rivers (References 5 and 9). Data and analyses from those reports were utilized in this Flood Insurance Study. The U.S. Army Corps of Engineers work was revised at the following locations by the study contractor to reflect changes in Manning's "n" values, bridge codings, and floodplain delineation: Gunnison River was revised from station 20640 to station 51630; North Fork Gunnison River was revised from station 33980 to station 51390 and from station 81160 to station 100260; and Uncompahgre River was revised from station 880 to station 21724. The Colorado Water Conservation Board has reviewed these revisions and concurs with the changes. A Flood Insurance Study hydrology report for Montrose, Delta, and Mesa Counties (Reference 13) was completed in April 1979. Hydrological information and data concerning Delta County obtained from the hydrology report were used in the preparation of this study. The Colorado Water Conservation Board has prepared a Flood Plain Information report on Minnesota Creek near Paonia (Reference 22). This study utilized more detailed methods in determining floodplain delineation and therefore supersedes the previous report. A Flood Study has been prepared for Kohler Lane Bridge in Cedaredge (Reference 23). This Flood Study, performed on Surface Creek, resulted in a peak 100-year discharge of 1,050 cfs. This discharge is slightly less than the 100-year discharge determined for this study due to differences in the method of computation. Because more detailed methods were used for this Flood Insurance Study, it supersedes the previous study. ~ Flood Insurance Studies have been prepared for the City of Orchard City (Reference 24), the Town of Paonia (Reference 25), the ci ty of Del ta (Reference 26), and unincorporated areas of Mesa County (Reference 27) and Montrose County (Reference 28). The results of this study are in general agreement with the other Flood Insurance Studies. , The Flood Hazard Boundary Map for the Town of Hotchkiss (Reference 29) is in general agreement with this Flood Insurance Study. There is a discrepancy between the 100-year flood boundaries shown for North Fork Gunnison River in this Flood Insurance Study and those shown on the Flood Hazard Boundary Map for the unincorporated areas of Gunnison County (Reference 30). This discrepancy is due to the more detailed analyses performed for this study. 41