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Turkey Creek flows east from Shrine Pass into Redcliff and joins the Eagle River in the center of town. Like Eagle River, the Turkey Creek channel is steep and narrow but, unlike Eagle River, not very deep. It has a slope of 125 feet per mile and a width ranging from 10 to 20 feet. The channel depth is only 2 to 4 feet. The streambed is very rough, with many boulders. The flood plain gets as narrow as 20 feet near the mouth but as wide as 600 feet at Eagle Street. The flood plain has little vegetation, since a major portion of Redcliff is in the Turkey Creek flood plain. The primary underlying soils of Redcliff belong to the Cryoboralfs-Cryo- boralls Association.. These soils are cold, moderately deep, and well- drained. These are soils on steep mountain slopes (Reference 3). 2.3 Principal Flood Problems Flooding along the Eagle River and Turkey Creek in Redcliff normally occurs from May through July, and is usually the result of snowmelt. There are no documented floods in Redcliff along Turkey Creek or the Eagle River. However, when snowmelt flooding occurred elsewhere on the Eagle River, as it did in May 1970 and June 1969 in Minturn and Dowd, high water probably occurred in Redcliff (Reference 4). 2.4 Flood Protection Measures No flood protection or flood plain management measures have been taken in the Town of Redcliff or above Redcliff on the Eagle River or Turkey Creek. 3.0 ENGINEERING METHODS For the flooding sources studied in detail in the community, standard 'hydrologic and hydraulic study methods were used to determine the flood hazard data required for this study. Flood events of a magnitude which are 'expected to be equalled or exceeded once on the average during any 10-, 50-, 100-, or SOQ-year period (recurrence interval) have been selected as having special significance for flood plain management and for flood insurance premium rates. These events, commonly termed the 10-, SO-, 100-, and SOO-year floods, have a 10, 2, 1, and 0.2 percent chance, respectively, of being equalled or exceeded during any year. Although the recurrence interval represents the long term average period between floods of a specific magnitude, rare floods could occur at short intervals or even within the same year. The risk of experiencing a rare flood increases when periods greater than 1 year are considered. For example, the risk of having a flood which equals or exceeds the 100-year flood (1 percent chance of annual occurrence) in any 50-year period is approxi- mately 40 percent (4 in 10), and, for any gO-year period, the risk increases to approximately 60 percent (6 in 10). The analyses reported here reflect flooding potentials based on conditions existing in the community at the time of completion of this study. Maps and flood elevations will be amended periodically to reflect future changes. 4