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and guide levees at the Templeton Gap outlet. The improved channel's original design capacity of 50,000 cfs has been reduced because of changes in the stream's regimen. Local interests have constrncted a 0.5-mile long concrete retaining wall to stabilize the FOuntain Creek south bank as it extends up- stream from the Nevada Avenue bridge. Downstream from this bridge, several small levees provide minimal protection to privately owned properties. The city has purchased the land along Monument Creek to prevent development and has established the Monument Valley Park. Located between Filmore Street and Colorado Avenue, the park occupies a considerable portion of the flood plain in this area. -. - Existing zoning and subdivision contain provisions which can be flood plain management program. necessary flood plain management gency phase of the NFIP. ordinances enacted by the city the foundation of an effective Colorado Springs has adopted the standards to qualify for the emer- The National Weather Service, in cooperation with Colorado Springs and other communities in El paso County, has established a Flash Flood Warning System consisting of observers and automatic alarm systems (Reference 5). Portions of several streams in the Colorado Springs area have been channelized in concrete drainageways with sufficient capacity to contain 100-year peak discharges. Streams where this has occurred are Bear Creek, Camp Creek, Douglas Creek (North and South), Sand Creek, Spring Creek, Peterson Field Drainage, Rockrimmon Basin, and South Shooks Run, Templeton Gap Lower Tributary, and portions of Dry Creek. The middle and upper portions of Cottonwood Creek in Colorado Springs have undergone channel improvements consisting of channel widening, riprap channel banks, and levee systems. A portion of Monument Creek south of Woodman Road has been channelized. This improvement has considerably reduced the extent of the 100-year flooding in this area. ~ 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 equaled or exceeded once on the average during any 10-, 50-, 100-, or 500-year period (recurrence interval) have been selected 12