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<br />Table 8. (Cont.) <br /> <br />MAP <br />NO. <br /> <br />16 <br /> <br />COUNTY <br /> <br />Fremont <br /> <br />Garfield <br /> <br />~case ] <br />Study <br />No.2 <br /> <br />40 <br /> <br />TYPE OF <br />COMMUNITY/AREA LANDSLIDE <br /> <br />FAC ~ITIES AT RISK <br /> <br />-.. . <br /> <br />Lower reaches and Debris flows <br />alluvial fans of <br />tributaries to Arkansas <br />River between Salida <br />and Canon City <br /> <br />17 <br /> <br />Fourmile Creek <br /> <br />18 <br /> <br />Douglas Pass <br /> <br />19 <br /> <br />Glenwood Springs and <br />vicinity <br /> <br />20 <br /> <br />Roan Creek <br /> <br />21 <br /> <br />Sweetwater Creek <br /> <br />22 <br /> <br />Douglas Pass-Baxter <br />Pass Region <br /> <br />Debris flow/ <br />landslide <br /> <br />- <br /> <br />MITIGATION <br />ACTMTY <br /> <br />and county Reconnaissance <br />roads r3ilroad, and existing hazard study needed. <br />and ~ ptential development <br />lands <br /> <br />Coun ty road and irrigation <br />ditch <br /> <br />St. FIwY. 139 (closed <br />duriIJ ~ frequent landslide <br />episc ~es over the past 10 <br />years ,natural gas trans- <br />missipn lines (numerous, <br />multi Ie breaks in the <br />.. ) <br />-J. <br /> <br />Very active <br />multiple earth- <br />flows, debris <br />flows and other <br />landslides <br /> <br />Many small <br />debris-flow basins <br />and subsidence <br />caused by hydro- <br />compaction in <br />older deposits of <br />the fans <br /> <br />Two earthflows <br />converging from <br />opposite sides of <br />the valley <br /> <br />Debris flows <br /> <br />Landslides <br /> <br />Resi ences, commercial <br />prop rties, streets and <br />othe public facilities <br /> <br />FarJJ house, potential <br />. . g of Roan Creek <br /> <br />County road, residences <br />Wes ern Gas supply lines <br /> <br />Preliminary analysis <br />by CGS. County road <br />crews and ditch com- <br />pany cleaned up <br />landslide. <br /> <br />Regional surficial <br />geology and slope- <br />stability mapping <br />completed by CGS. <br />Hazard analysis of <br />individual landslides <br />affecting St. Hwy. <br />139 completed by <br />CGS. Mapping <br />distributed to several <br />gas pipeline com- <br />panies for potential <br />alignment relocation. <br />No significantly safer <br />alignment for highway <br />found without major <br />relocations. <br /> <br />Debris-flow hazard <br />mitigation plan <br />developed but <br />negligible <br />implementation. <br /> <br />Study in progress <br />by CGS and Colorado <br />School of Mines. <br /> <br />No new activity. <br /> <br />Extensive <br />geotechnical studies. <br />Monitoring and struc- <br />tura1 mitigation in <br />progress by company <br />and consultants. <br />