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to downstream of the Santa Fe Avenue bridge. In 1952, the COE extended the floodwall downstream past Runyon Field. This gives the Arkansas River channel a capacity of approximately 110,000 cfs. The floodwall has a freeboard in excess of 3 feet for both the 100- and 500-year floods. A levee, located on the east side of Fountain Creek, extends from River Street upstream to 8th Street. Both 100- and 500-year flooding flows behind the levee into the east overbank from upstream of 8th Street. In addition, both the 100- and 500-year floods can overtop the structure at several locations. A levee has been constructed on the east side of Wild Horse-Dry Creek from 11th Street upstream to south of 16th Street. There is a breach in the levee at a point across from 15th Street where a tributary joins Wild Horse-Dry Creek. Upstream of this breach, the levee is in generally poor condition; however, the 100-year flood does not reach the toe of the levee in this area, and the 500-year flood easily overtops the structure. Elsewhere along the levee, there is a freeboard that varies from 4 to 12 feet above the 100-year flood. The 500-year flood overtops the levee or has inadequate freeboard; in addition, 500-year flooding flows behind the levee from upstream. A levee is located west of Lake Minnequa, south of Minnequa Ditch. The structure is overgrown and not maintained. It appears to have no effect on 100-year flooding from Lake Minnequa. The COE has been authorized to prepare Phase I Plan Formulation Memorandums for Fountain Lake. As presented in the project document (Reference 6), the flood control project would be located on FOuntain Creek, from approximately 1.0 to 1.5 miles upstream from the corpor- ate limits of Pueblo. In February 1968, the Pueblo City Council adopted a zoning ordinance that established standards to govern development in specified flood plain districts along FOuntain Creek, Dry Creek, Wild Horse-Dry Creek, and the Arkansas River. The City of Pueblo has purchased the 100-year flood plain on Dry Creek, south from 24th Street to the confluence with the Arkansas River. 3.0 ENGINEERING ME'rBODS 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 as having special significance for flood plain management and for flood insurance rates. These events, commonly termed the 10-, 50-, 100-, and 14