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<br />County <br />Garfield <br /> <br />-..J <br />'" <br /> <br />Community/Area <br />Douglas Pass slides <br /> <br />Glenwood Springs and <br />vicinity <br /> <br />Roan Creek <br /> <br />Sweetwater Creek <br /> <br />Western Gas Supply lines <br /> <br />Type of Slide <br /> <br />Very active multiple <br />earthflows, debris <br />flows, and other <br />slides. Movement in <br />many areas is so <br />active that the <br />terrain can change <br />completely within <br />the period of one <br />year. <br /> <br />Debris flows. Ground <br />failures caused by <br />hydrocompaction. <br /> <br />Two opposing earth- <br />flows <br /> <br />Debris flows <br />Landslides <br /> <br />Facilities at Risk <br /> <br />Highway has been closed <br />during frequent landslide <br />episodes over the past ten <br />years. There have been <br />numerous and multiple <br />breaks in natural gas <br />transmission lines in the <br />vicinity. <br /> <br />Residences, commercial <br />properties, streets and <br />other public facilities. <br /> <br />Farm house; potential <br />damming of Roan Creek <br /> <br />County road, residences <br />Gas lines <br /> <br />Activity <br /> <br />Regional sur- <br />ficial geology <br />and slope stabil- <br />ity mapp i ng has <br />been completed by <br />CGS. Hazard <br />analysis of indi- <br />vidual slides <br />affecting Highway <br />139 completed by <br />CGS. Mapping <br />distributed to <br />several gas-pipe- <br />line companies <br />for potential <br />alignment reloca- <br />tion. No signi- <br />ficantly safer <br />alignment for <br />highway was <br />found with major <br />relocation. <br /> <br />= <br /><.:..> <br />N <br />00 <br />c:.n <br />-J <br /> <br />Debr i s-fl ow <br />hazard mitigation <br />plan developed <br />but negligible <br />implementation. <br /> <br />Study in progress <br />(CGS, Colo. <br />School of Mines) <br /> <br />No activity <br />