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<br />. <br /> <br />. <br /> <br />Collina and Sheep Draw near Greeley. Local interests also assigned <br />these 8trea~S priority for study. Volume III of the Special Study <br />coverS Sheep Draw and Volume IV covers Fossil Creek. The locations of <br />these basins are shown on plate 1. <br /> <br />LOCATION OF DATA <br /> <br />Hydrologic modeling studies were conducted to determine the peak <br />discharges for floods of various probabilities of occurrence. This infor- <br />mattonwasdevelopedfirstfore><1stingwatershedlandusc. To deter- <br />mine the effect of increasing urbanization on flood runoff, possible <br />future urban land use was superimposed 00 the Y08s11 Creek basin. <br />Volume II of this study presents detailS of the hydrologic studies. <br />Hydraulic modeling studies were conducted to develop the flood water <br />surface profiles and flood plain boundaries. Flood profiles are shown <br />for existing and future conditions. Flooded area mapa are shown for <br />exiati~ conditions. <br /> <br />Copies of this report are available for public distribution at the <br />offIces liated below. Topographic, hydrolog1c, and hydraulic data used <br />in this study are also on file in the Flood Plain Manage~ent Serv1ces <br />Branch, OmahaD19tr1ct Corps of Engineers, 215 North 17th Street, <br />Omaha, NE 68102. <br /> <br />Lari~er County Planning Depart~ent <br />f.O.BoxlL90 <br />Fort Collins, CO 80522 <br /> <br />CoulItyEng111ee>: <br />Lar1merCoulIty <br />P.O. Box 1190 <br />Fort Coll1ns, 00 80522 <br /> <br />Colorado Water Conservation Board <br />M~ ~._._ '"u.___._. ~..,..,~_ <br />~.~ ~.~~~ ~_"..""._. _~UH"O <br />131JShermallStreet <br />Denver, 00 80203 <br /> <br />ACKNOWLEDGEMENTS <br /> <br />Principal cooperation and coordinat1on for Volume IV waS with <br />representat1vesoftheFederalEmergen<:yM.anagementAgency(FEMA),the <br />Colorado Water Conservation Board (eWCS), Larimer County, and the city <br />of Fort Collins. <br /> <br />Flood Plain Analysis <br /> <br />RELATED STUDIES <br /> <br />FEMA has completed a report ent1tled Flood Insurance Study. Larimer <br />County. ColoradO. Unincorporated Areas, published in April 1979. Fossil <br />Creek was not included among the strea~s stud1ed in this flood 1nsurance <br />study. <br /> <br />STUDY AREA DESCRIPTION <br /> <br />. <br /> <br />Fossil Creek, a right-bank tributary to the Cache la foudrs River, <br />is located eouth of FortCollll1s in Lsrimer County. lthas ita aource <br />near the south end of ~orsetooth Reservoir and flo~s 1n 11 generally <br />eastward d1rection to 1ts confluence with the Cache 111 poudre River <br />east of Fossil Creek Reservoir. The basin is about 3 ~ilea wide and 11 <br />,dles long. Fossil Creek has a total drainage area of about 12 square <br /> <br />. <br /> <br />3 <br /> <br />4 <br />