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002880 fall somewhere between $500,000 and $1 million. The 1981 debris flows in Glenwood Springs caused approximately $100,000 in damages. 2. Landslides caused approximately $300,000 in damages in 1984, and over $500,000 in damages in unincorporated Garfield County in 1985. In May, 1985, 20 county roads were blocked by landslides, and Baxter Pass had to be closed. In May, 1985, Garfield County also recorded the largest mudslide in Colorado history, a 175-foot thick mass of debris that was a mile long and 1,000 feet wide. 3. In addition to direct damages, other economic impacts include loss of tourist trade due to media coverage of events and fish kill in the Roaring Fork River and other streams, although these losses are undocumented. 4. The "hidden" impacts of debris flows are documented in a 1986 report by the Mt. Sopris Soil Conservation Board and Marian Smith, "Debris Flow Costs and Inventory of City of Glenwood Springs Area." Some of these costs are: a) trauma, and the stress induced by recurring fears in some residents when thunderstorms occur, b) homeowner costs of clean up and repair, including boots, gloves and tools, and damage to furnaces and appliance motors, c) the loss of landscaping, acquired over many years and too costly to replace all at once, and d). irreplaceable personal possessions such as clothes, books, family photos, etc. D. Population at Risk (also see Hazard Analysis, Appendix 1) 1. Threat areas identified in this hazard analysis are based on historical frequency and geotechnical studies (see References, Appendix 8). This does not imply that damages from future events will be experienced in or confined to the areas identified. In general, although most parts of the city are vulnerable to debris flows, the threat is greatest to people and property on the upper parts of debris fans, with vulnerabil ity decreasing to those lowest on the fans. - 95 -