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Purpose and Scope of !lousing and Urban Development, Federal Insurance Administration. These flood boundaries have been delineated on 1" '" 2,000 ft. scale topographic maps. The approximate flood limits identified on the flood prone area maps prepared by the Geological Survey, are some- what wider than the actual flood plain area determined in this report. Other generali~ed evaluations On the potential extent of flooding within the comnunity have been completed by the City Bngi- neer for the City of Brush. No technical data is provided in the generali~ed evaluation, however these evaluations have been reviewed and considered in completing this study. The findings of this study ShOw the flood plain limits to be much wider and encompass more of the community than originally envisioned by the City Engi- neer and city officials. As nO previous detailed studies have been completed on Beaver Creek near Brush, the study results presented herein are to be considered authoritative for purposes of flood plain information and flood plain management. This report was prepared to guide local Qfficials in planning the use and regulation of the flood plain as designated so th~t flood ha~ards and future ,flood damages are minimi~ed. The repOrt includes information on historical floods, factors which influence these flood hazards and the nature and e~tent of probable future floods. The report data includes a flooded area map delineating the 100-year flood boundary, flood profiles and flood plain cross sections showing the high water elevations for the 10-, 50-, 100-, and 500- year floods at selected reference points. A Technical Addendum in- cludes the supporting engineering and hydrologic data a:ld compu- tations. Acknowlcdqements The assistance and cooperation of the agencies, firms and or- qaniz<l.tions listed belOW, as well as the many private citizens who supplied information and data, is appreciated and gratefully acknow- ledged. City of Brush, City Council and Staff Colorado Water Conservation Board U. S. Department of the Interior, Geological Survey Burlington Northern Railroad Colorado State Highway Department Morgan County Extension Service Soil Conservation Service U. s. Army Corps of Engineers, Omaha District Upper Platte River and Beaver Ditch Company The Brush News Tribune The Brush Banner Maps and Surveys Th., contour map on which the flood plain is delineated and the flood plain cross-sections USCQ to calculate the water sur- face elevations were prepared by Bell Mapping Comp~ny under a separate contract with the Colorado Water Conservation Board. ~NO foot and five foot contour interval maps for the area north of and south of County Road DLD respectively were prepared photogrammetrically from aerial photos taken in April, 1975. 'rhe maps were CDmpiled at a scale of 1" = 100', reduced for the flood r;>lllin d""1inF',,tion map t.n SC"lPil of 1" = 200' and 400' and meet or exceed National Map Accuracy Standards. The cross-'H:lctions used in the hydraulic analyses '.;ere also Obtained by photogrammetric methods. Permanent monuments shown on the base maps were established in the field during control surveys for the aerial mapping. The ~elatcd Piood Studies No previous, detailed study data or reports have been published concerning the t~tential flood hazards on Beaver Creek in the area in and around Brush, Colorado. Approximate boundaries of flood prone areas, howev€r, haVD been delineated by the U. S. Depilrtment -,- -4-