Laserfiche WebLink
<br />".-' <br />- -' - -,-- <br /> <br />00664 <br /> <br /> <br />"-_. ~.._----_. <br /> <br />.,-'---. . <br /> <br />Because this was a new or "single event" earthf10w it was considered a <br />prime target for detailed mapping. The intent being to determine the <br />primary features and, to the extent possible, the mechanisms of <br />emplacement. For purposes of this study and to evaluate the hazard, new <br />aerial photography was flown and detailed topography completed. <br /> <br />WORK IN PROGRESS. We are currently supporting detailed mapping and <br />study by a graduate student from the Colorado School of Mines. Field <br />work was underway during the summer of 1986 and a final report is due by <br />May of 1987. <br /> <br />FUNDING SOURCES: SEF, SGF, USGS.. <br /> <br />14) <br /> <br />Aspen Mountain landslide, city of Aspen. This slide occurred in the <br />spring of 1984 on the steep lower slopes of Aspen Mountain immediately <br />upslope from an area of existing and intended future deve1opment. <br />Monitoring was installed and geotechnical studies carried out to evaluate <br />and mitigate the hazard. This work was still underway during summer of <br />1986. Funding has primarily been from private sources with CGS <br />involvement through LCF and SGF. <br /> <br />Lam lite Park Subdivision landslide, Grand Junction (Mesa Count ). <br />1S S 1 e came to our attent10n 1n . Approx1mate y twe ve new <br />residences on a steep bluff above the Colorado River were in various <br />stages of distress and several had been declared unsafe for occupancy. <br />CGS carried out a drilling program and geologic evaluation with <br />recommendations. Funding for the study was from SEF, LCF and SGF sources. <br /> <br />Morrison Water Plant slide, Jefferson County. This slide occurred in <br />late spring of 19B5. A steep slope composed of Precambrian metamorphics <br />and Pennsylvanian arkose started moving toward, and threatened to engulf, <br />the town water treatment facilities. Recommendations from CGS and <br />private consultants resulted in removal of most of the slide mass. <br />Further recommendations were to hold plans for expansion of the faCility <br />in abeyance until a thorough stability analysis proved the site to be <br />viable for expansion facilities. <br /> <br />Ve a Reservoir and adjacent areas, Mesa Cou~~ <br />was as e esa ounty 1n to eva~ <br />slide problems on Plateau and Buzzard Creeks upstream from Colbran. The <br />particular concern was that failure of landslide-formed dams could <br />exacerbate already severe downstream flooding on Plateau Creek. After a <br />field reconnaissance of the area, it was put on our list for high <br />priority action. <br /> <br />15) <br /> <br />16) <br /> <br />17) <br /> <br />WORK COMPLETED. Very extensive aerial photography of valley lands of <br />the area were flown in August of 1985. Special topography of the Vega <br />Reservoir Road area was compiled and detailed photogeology ani field <br />checking was completed in June of 1986. The conclusion of this report <br />was that, although severe maintenance problems and road closures will be <br />a reality, the probability of a very large stream blockage is nJt very <br />high. <br /> <br />- 5 - <br />