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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />!I <br />I <br /> <br />INTERPRETATION AND USE OF REPORT <br /> <br />Flood Frequency and Discharge <br /> <br />Discharges listed in "Hydrologic Analysis" in this report are given <br />for the 10-, 50-, 100-, and SOD-year frequencies. This discharge <br />information can be used for planning and engineering of floodplain <br />improvements as well as for floodplain regulations upon official <br />designation by the Colorado Water Conservation Board. <br /> <br />The 100-year flood can be expected to occur at any time in a given <br />area. Based upon recorded historical precipitation, land runoff <br />characteristics and other data, ther is a one percent chance that the <br />100-year flood will be equalled or exceeded in anyone year. The <br />100-year flood is considered by CWCB and the Federal Emergency Management <br />Agency as the flood magnitude for which floodplains should be designated <br />for regulatory and improvement purposes. In Colorado, the 100-year <br />floodplain is an area of state interest as defined in House Bill 1041 - <br />Section 24-60-101 of the Colorado Revised Statutes. <br /> <br />Flood events rarer than the 100-year flood event can and will <br />occur. Plans for land improvement adjacent to the 100-year floodplain <br />should consider the probability of flood damage. <br /> <br />Flood Elevations <br /> <br />Plates 6 through 13 show the 10-year and 100-year flood profiles <br />for Gregory (Eureka) Gulch and Plate 14 shows the profile for Nevada <br />Gulch. <br /> <br />Plate 15 shows a graphical display of some of the Gregory Gulch <br />cross-sections and the computed 100-year flood elevations at these <br />cross-sections. Table 1 gives a summary of pertinent data at each <br />cross-section. The actual HEC-2 computer output is in the files of the <br />Colorado Water Conservation Board. In case of any question regarding <br />100-year flood elevations, the flood profiles should be consulted. <br /> <br />Flood Insurance <br /> <br />The National Flood Insurance Program (NFIP) is a Federal program <br />that enables property owners to buy flood insurance at a reasonable, <br />subsidized cost. In return, communities are required to carry out <br />floodplain management measures to protect lives and new construction from <br />future flooding. Exhibit 3 gives some NFIP rate information. Additional <br />information on the NFIP is available from the following sources: <br /> <br />COMMUNITY INFORMATION: <br /> <br />AGENT AND BROKER INFORMATION: <br /> <br />Federal Emergency Management Agency <br />Natural & Technological Hazards Division <br />Bldg. 710, Denver Federal Center <br />Box 25267 <br />Denver, CO. 80225-0267 <br />(tel. no. 235-4830) <br /> <br />Mr. Jim Quinn ' <br />Computer Sciences Corp. <br />2801 Youngfield, suite 320 <br />Golden, CO. 80401 <br /> <br />(tel. no. 231-9911) <br /> <br />8 <br />