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iii iiiiiiiiiiiu iii <br />999 <br />STATE OF COLORADO RIC HORD D. LP.MM, fovem o~ <br />DEPARTMENT OF NATURAL RESOURCES <br />D. Monte Pascoe, Executive Director <br />MINED LAND RECLAMATION <br />423 Centennial Building, 1313 Sherman Street <br />Denver, Colorado 80203 Tel. (3031866-3 56 7 <br />David C. Shelton <br />April 28, 1982 Director <br />TO: Rich Domingue ~\1 ~ _ <br />FROM: Jim Pendleton /~~n .~-~- <br />RE: Visitation th lue Ribbon Mine Site <br />Dave Shelton and I visited the Blue Ribbon mine site on Tuesday, April 13, 1982. <br />We met with Marv Rdams of Western Associates, Inc. and Ken Meyers of Rocky <br />Mountain Geotechnical, Inc. We examined the portal bench and highwall land- <br />slide and rockfall areas. Having closely examined the site, I am now more <br />receptive to the company's contention that the major cause of landsliding of <br />the portal bench is surface water infiltration. Drainage of the mine bench <br />is next to non-existent, causing water to impound and infiltrate in numerous <br />locations. In addition, both sewer and water supply lines appear to have <br />ruptured either slightly before or following the original landslide movement. <br />Both of these situations undoubtedly contributed additional water to the already <br />saturated bench materials. I recommend that we proceed as foll~ot,•s: <br />1) Require Blue Ribbon Coal Company to complete an appropriate surface drainage <br />redesign of the portal bench area. <br />2) Following approval of that design, require installation of the appropriate <br />facilities and regrading of the bench as soon as possible. Obviously, the company <br />will have to work around the large existing coal stockpile now in place on the <br />portal bench. <br />3) Require the company to cease stockpiling coal irmnediately adjacent to the <br />portal bench lip. Coal should be removed from those areas currently threatened <br />by the slide, and should not be placed closer than 10 feet to the bench lip. <br />4) The company should redesign the sewer and water lines serving the portal <br />bench. We discouraged the reinstallation of lines outside the currently disturbed <br />area below surface. we suggested that the company investigate the installation <br />of sewer and water lines above ground in insulated jackets. <br />We also examined the area disturbed by Blue Ribbon Coal Company last fall, to <br />the south of the existing portal area. The company received a Notice of <br />Violation for bulldozing an old access road to an abandoned fan portal. A <br />large portion of the affected slope is now actively landsliding. Head scarps <br />were obvious up to 100 feet above the original road cut. I recormmend that we <br />require that this area be included within the indicated disturbed areas in <br />the permit. Further, I recommend that we require bonding for resolution of <br />this problem prior to reclamation and bond release. <br />/mt <br />cc: Ed Bischoff <br />Dave Shelton <br />