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FLOOD INSURANCE STUDY TOWN OF SILVERTHORNE, SUMMIT COUNTY, COLORADO 1.0 INTRODUCTION 1.1 Purpose of Study This Flood Insurance Study revises and updates a previous Flood Insurance Study/Flood Insurance Rate Map for the Town of Silverthorne, Summit County, Colorado. This information will be used by the Town of Silverthorne to update existing floodplain regulations as part of the Regular Phase of the National Flood Insurance Program (NFIP). The information will also be used by local and regional planners to further promote sound land use and floodplain development. In some states or communities, floodplain management criteria or regulations may exist that are more restrictive or comprehensive than the minimum Federal requirements. In such cases, the more restrictive criteria take precedence and the State (or other jurisdictional agency) will be able to explain them. 1.2 Authority and Acknowledgments The sources of authority for this Flood Insurance Study are the National Flood Insurance Act of 1968 and the Flood Disaster Protection Act of 1973. The hydrologic and hydraulic analyses for the original study were performed by Gingery Associates, Inc., for the Federal Insurance Administration (PIA), under Contract No. H-4549. This work, which was completed in September 1978, covered all significant flooding sources affecting the Town of Silverthorne. The hydrologic and hydraulic analyses for the restudy were performed by Simons and Associates, Inc., for the Federal Emergency Management Agency (FEMA), under Contract No. EMD 97-CO-OO31. This study was completed in October 1998. 1. 3 Coordination For the original study, community base map selection and the identification of streams requiring detailed study were accomplished in a meeting attended by representatives from the FIA, the study contractor, the Colorado Water Conservation Board, and the Town of Silverthorne on May 12, 1977. The Summit County Planning Commission and Backlund Surveys, Frisco, Colorado, also provided assistance in gathering information for this report. During the course of the original study, hydrologic procedures, flood elevations, flood boundaries, and floodway delineations were reviewed with officials of the Colorado Water Conservation Board and the FlA. The final community coordination meeting was held on February 21, 1979, and was attended by representatives of the PIA, the study contractor, and the Town Planning commission. All problems raised at the meeting were resolved in this study.