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<br />. <br /> <br />PURPOSE AND SCOPE OF VOLUME \I <br /> <br />The purpose of Volume II is to present the details of the hydro- <br /> <br /> <br />logic studies made in support of the Cache La Poudre River Basin <br /> <br /> <br />Special Study. Data from these studies are used in the other volumes <br /> <br /> <br />of this report. <br /> <br />Streams analyzed include the Cache la Poudre River, several tribu- <br /> <br /> <br />taries in the mountains, and Fossil Creek and Sheep Draw in the plains. <br /> <br /> <br />Discharges were computed for floods of various probabilities of occur- <br /> <br /> <br />rence. Hydrologic modeling studies are described including assumptions <br /> <br /> <br />made. If appropriate, the effect of future urban growth on flood dis- <br /> <br /> <br />charge was included for a particular watershed. <br /> <br />Cache La Poudre River Hydrology <br /> <br />GENERAL <br /> <br />This section outlines hydrologic studies for the Cache la Poudre <br /> <br /> <br />River and several tributaries. Discharges are determined for the 10-, <br /> <br /> <br />50-, 100-, and 500-year floods for existing conditions. Future urban- <br /> <br /> <br />ization was considered to have no significant effect on the Cache la <br /> <br /> <br />Poudre River. <br /> <br />Hydrologic studies for the Cache la Poudre River downstream from <br /> <br />the North Fork Cache la Poudre River were completed in 1973. These <br /> <br /> <br />studies were used in three Flood Plain Information Reports covering <br /> <br />the Cache la Poudre River. Volume I concerned the Fort Collins area <br /> <br /> <br />(published October 1973), Volum~ II covered the Greeley area (March <br /> <br />. <br /> <br />3 <br />