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Water surface profiles, typical cross-sections, and maps showing the 100-year flood boundaries are shown on included exhibits and flood plain maps. Tables 2(a) and (b) show computed flood elevations at specific cross-sections. Flood boundaries were located on the set of topographic maps, previously referred to, by transferring flood elevations (at map contour intervals) from plotted profiles (from HEC-RAS) to the maps using stationing along the main channel as the location reference. These points were connected and smoothed to create the map flood boundaries. FLOOD PLAIN MANAGEMENT Potential flood damages to existing development and possible loss of life can be alleviated or lessened through non-structural and structural flood hazard mitigation methods. Non-structural methods include: Local flood plain regulations, land treatment, flood warning and forecasting systems, flood insurance, flood proofing, flood fighting, and emergency evacuations. A. Local Regulations The need to minimize property damage due to flooding has been recognized by planners and local community officials. Sub-dividers and developers are required to submit proposed storm drainage plans to the planning commission for approval. In the past, drainage plans have been prepared singularly or on a plat-by-plat basis. Information contained in this report will be useful in developing a master drainage plan for the study area. This report provides the outline of flood hazard areas on large scale maps specifically for this purpose. The City may provide zoning regulations "... To establish, regulate, restrict, and limit such uses on or along any storm or floodwater runoff channel or basin, as such storm or floodwater runoff channel or basin has been designated and approved by the Colorado Water Conservation Board, in order to lessen or avoid the hazards to persons and damage to property resulting from the accumulation of storm of floodwaters..." as stated in Section 30- 28-111 for county governments and Sections 31-23-302 for municipal governments of the Colorado Revised Statutes. B. Colorado Natural Hazard Area Regulations In 1974, the Colorado General Assembly passed House Bill 1041, a bill "Concerning land use, and providing for identification, designation, and administration of areas and activities of State interest,..." (H.B. 1041, Title 24, Article 65.1, CRS, as amended) Areas of State interest include natural hazard areas, or those areas that are, "So adverse to past, current, or foreseeable construction or land use as to constitute a significant hazard to public health and safety or to property." Flood plains are natural hazard areas. 10 I I I I I II I II II I I I I I II I II I II II