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. . . The City of Colorado Springs should regulate the approximate floodplains on a case-by-case basis subject to a detailed hydrologic and hydraulic analysis. A detailed floodplain analysis will be required in certain cases, as listed above. The detailed analysis should be performed by a professional engineer and submitted by the development proponent. An approximate floodplain analysis may be submitted by a developer or development proponent, for the specific cases listed above (open space, agriculture, farm bridges, pole barns, and individual single residential structures), in accordance with the determinations of the Colorado Water Conservation Board regarding the applicability of the Guidelines. The City of Colorado Springs may also require, at its discretion, that a detailed floodplain analysis be submitted in lieu of the use of the Guidelines methodology for any situation that it deems necessary. Hvdraulic Analvsis Hydraulic information used for the preparation of the Colorado Springs FIS was accomplished using both detailed and approximate engineering methods. For those streams in the county that have detailed floodplain delineations, the hydraulic analyses were performed using standard engineering procedures for determining IOO-year water surface elevations, as discussed in Section 3.2 of the FIS. For the streams that have approximate floodplain information, the hydraulic analyses likely consisted of interpretation of available topographic mapping, along with telephone discussions with local officials, Future hydraulic analyses, submitted by developers or development proponents, for determining IOO-year water surface elevations for approximate floodplains may be performed using FEMA's Quick-2 computer program, the Corps of Engineers' HEC-2 computer program, or other acceptable hydraulic methods. 5