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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 />information. The hydrologic analysis contained in this report used a <br />statistical stream gage analysis of USGS gages in the Monte Vista, Del <br />Norte and Alamosa areas, in order to establish a regional relationship <br />between discharge and area. The Intermediate Regional Flood (identical to <br />the 100-year frequency flood), was the only peak discharge that could be <br />utilized in the currant flood insurance study for the Rio Grande River at <br />Monte Vista. <br /> <br />COM reviewed the hydrologic analysis contained in Reference 3, and <br />concluded that additional stream gage data (8 years) should be added to the <br />original COE analysis of the Rio Grande River. The stream gage analysis <br />carried out for the USGS gage at Del Norte, Colorado described previously <br />in this summary, was utilized to estimate peak discharges at Monte Vista. <br />The regional relations developed in Reference 1, for the Mountain Regions <br />of Colorado were utilized to carry out an area proportion analysis to <br />adjust the station results estimated at the Del Norte gage, downstream to <br />Monte Vista. The results compared within 10 percent of the 100-year flow <br />contained in Reference 3. It was therefore recommended that COM's <br />hydrologic analysis which supplemented the hydrologic anaysis contained in <br />Reference 3, be used in the flood insurance study for Monte Vista <br />(reference our letter to FEMA and CWCB, dated May 14, 1980, in Appendix B). <br />The peak discharges have been shown in Table 1. <br /> <br /> <br />City of Salida, Colorado <br /> <br />The streams included in the flood insurance study for the City of Salida <br />were the Arkansas and the South Arkansas rivers. The existing literature <br /> <br />14 <br />