Laserfiche WebLink
2004 Geologic Hazard Field Observations <br />South of Divide Mining Area <br /> <br />remnant boulders near roads near the base of steep slopes, should be documented prior to <br />mining. Tt is suggested that signs stating, "Watch for Falling Rock" (similar to signs <br />posted along major highways in high rockfall potential azeas), be posted on the more <br />well-traveled roads, such as the Dry Fork and Main Fork of Minnesota Creek roads, when <br />(or before) mining begins in these areas. <br />5. There is no historical record from annual observations in the West Elk Mine area <br />regarding effects of mining on springs and local water-bearing zones, with sources in <br />either surficial material or bedrock. It is recommended that spring and water well <br />monitoring be conducted before, during, and after mining in order to determine any <br />mining effects. <br /> <br /> <br />6. Although no cracks are expected in the soft, pliable alluvium, some cracks are expected <br />to occur on the harder and more highly compacted Dry Fork access road, particularly in <br />the area near the confluence of Deer Creek and Dry Fork. As discussed previously, the <br />range of maximum vertical displacement, tilt, and horizontal strain is projected to be 8.4 <br />to 11.2 feet, 1.3 to 6.4 percent, and 0.7 to 4.2 percent, respectively, in the North Fork <br />stream valley and road above the solid coal boundaries at western limits of longwall <br />panels E2 and E3. <br />D:1WOrk1A'WL~631-0321621Lrz\SOD GPA Naz~10D4 SOD Geo}laz Report.doc <br />631-032.621 <br />November 2004 <br />Wright Water Engineers, Inc. <br />Page 49 <br />