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<br />. <br /> <br />October 1981 <br /> <br />SPECIAL STUDY <br />CACHE LA POUDRE RIVER BASIN <br />LARIMER-WELD COUNTIES <br />COLORADO <br /> <br />VOLUME I <br />FLOOD HAZARD, DAM SAFETY, AND <br />FLOOD WARNING <br /> <br />Introduction <br /> <br />BACKGROUND <br /> <br />The Cache la Poudre River basin in Colorado is in a rapidly <br /> <br /> <br />growing area. The population of Larimer and Weld Counties increased by <br /> <br />about 60 percent between 1970 and 1980. The basin contains a number of <br /> <br /> <br />flood hazard areas, from narrow canyon flood plains in the mountainous <br /> <br /> <br />west to wide valley flood plains in the east. Local interests are <br /> <br /> <br />cDncerned about the changing nature of the flood hazards in the basin <br /> <br /> <br />as a consequence of urban growth, particularly since the catastrophic <br /> <br /> <br />Big Thompson River flood in the summer of 1976. Discussions regarding <br /> <br /> <br />a wide ranging study of the basin were initiated between the Omaha <br /> <br /> <br />District, Corps of Engineers and local planners and elected officials <br /> <br /> <br />in 1977 and a plan of study was agreed upon. <br /> <br />AUTHORITY <br /> <br />. <br /> <br />This study was made under continuing authority in Section 206 of <br />the 1960 Flood Control Act, as amended. <br /> <br />-~ <br />