Laserfiche WebLink
Spring 2017 Subsidence and Geologic Field Observations <br />South of Divide and Dry Fork Mininq Areas <br />included. E -seam overburden depth at this location is similar to that on the pad (i.e., slightly <br />greater than 800 feet). <br />Figure 3. Southward view along the west side <br />of the fenced area around the well showing <br />portions of the longest subsidence crack <br />(intermittent over 250 feet). <br />4.3.2 Location 3 <br />Figure 4. Southward view of two sub -parallel <br />subsidence cracks near the southern end of the <br />MVB pad. Subsidence cracks on this portion of <br />the MVB pad were observed to have the <br />maximum depth likely due to a brittle sandstone <br />layer a few feet beneath the area. <br />Location 3 is located approximately 650 feet south of the MVB E6-13 on the main road. At this <br />location, several small and one larger subsidence crack were observed in an orientation parallel <br />with the road (i.e., N10°W). The maximum dimension of these cracks was 15 feet long, 1 inch <br />wide, and 4 inches deep (Figure 5). E -seam overburden depth at this location is approximately <br />800 feet. <br />831-032.799 Wright Water Engineers, Inc. Page 14 <br />August 2017 <br />