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9.0 REVISIONS DESCRIPTION This section has been added to provide information regarding significant revisions made since the original Flood Insurance Study was printed. Future revisions may be made that do not result in the republishing of the Flood Insurance Study report. To assure that any user is aware of all revisions, it is advisable to contact the community repository. 9.1 First Revision The purpose of this revision 1S to add flooding information from the Cache La Poudre River near the Town of Windsor that affects the unincorporated areas of Weld County. The hydrologic flood frequency relationships used in the study were prepared by the COE, Omaha District (Reference 39), The hydraulic analysis Associates, Ioc., the Number EMW-86-C-2262. for this study was prepared by Simons, Li & study contractor, for FEMA under Contract This work was completed in July 1990. An initial coordination meeting for this study was held between representatives of Weld County, the Town of Windsor, FEMA, the CWC8, and the study contractor on March 30, 1988. The pnmary purpose of this meeting was to discuss the study limits for the detailed analysis, the hydrology, historic flooding problems, structures located within the study reach, the availability of sui table mapping, and issues regarding the Eas tman Kodak Company (Kodak), which owns property and has a manufacturing plant adjacent to the Cache La Poudre River. On July 6, 1989, a intermediate Consultation and Coordination Officer's (CCO) meeting was held at the study contractor's office with representatives of FEMA, the Town of Windsor, and the study contractor. Preliminary results of the floodplain analysis in Weld County were reviewed and discussed. The results of this study were reviewed at the final CCO meeting held on December 13, 1990, and attended by representatives of Weld County, the Town of Windsor, the study contractor, and FEMA. All problems raised at that meeting have been resolved. The Cache La Poudre River was County Road 23 upstream to distance of 9.3 river miles. studied by detailed methods from Weld the Larimer/Weld County boundary, a The COE hydrology was developed using HEC-l, a general rainfall- runoff computer model developed by the COE's Hydrologic Engineering Center (Reference 40). The appropriateness of this routing method was verified using historical data for the 1976 and 1983 floods on the Cache La Poudre River. The HEC-l routing method is considered valid to use for the routing of the hypothetical 100-year flood (Reference 39). The results of the COE hydrologic analysis were 45