Laserfiche WebLink
Spring 2014 Subsidence and Geologic Field Observations <br />South of Divide and Dry Fork Mining Areas (E -Seam) <br />diminished due to weathering and healing. The continual length of cracks was less than 30 feet <br />during the spring 2014 field visit; considjerably less than observed during our fall 2013 field visit <br />when the longwall face was active beneath this area. Overburden depth to the E -seam in this area <br />is about 790 feet. <br />No subsidence cracks were observed on t�e MDW E4 -14 pad during our fall 2013 field visit, even <br />though it appeared that the active longwaall face was directly beneath this location. Spring 2014 <br />observations found the remnants of subsidence cracks that likely developed shortly after our fall <br />2013 field visit. Several relatively continuous cracks were observed during the spring 2014 field <br />visit; one with a N25 0E orientation that *as intermittent over a distance of about 60 feet. As of <br />the time of our spring 2014 field visit, tl hs crack had a maximum width and depth of 1.75 and 20 <br />inches, respectively (Figure 9). Another crack was observed to cross the pad and lead onto the cut <br />slope. <br />831 - 032.795 Wright Water Engineers, Inc. Page 19 <br />September 2014 <br />