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been 15.0 psi at VWP -08, also reported in our December 21, 2009 instrumentation <br />monitoring report (411 Quarter, 2009). <br />In any event, on -going monitoring of all piezometers is recommended to monitor pore <br />pressure responses to the on -going refuse placement. Otherwise, the measured pore <br />pressures are consistent with the revised stability evaluation for the coal refuse <br />performed by BGI (2008). <br />Site Visit Observations <br />During my site visit on December 17, 2013 with Mr. Gary Harding (Bowie Resources) and <br />Ms. Tamme Bishop of J.E. Stover & Associates, no gob stockpiling or processing was <br />being performed at CWDA No. 2. It is our understanding that, due to winter conditions, <br />Pile #2 will not be used until spring. Ms. Bishop and I walked the perimeter of Pile #2, <br />including the drainage ditch upslope of the pile, and I did not observe any surface <br />failures in either compacted or uncompacted gob. The air temperature was approximately <br />40 degrees F in sunny conditions and surface drainage from snow melt was observed in <br />several of the drainage culverts and ditches that serve Pile No. 2. <br />In general, the grading and compaction of CWDA No. 2 appears to be progressing well <br />and significant work has been done since our last site visit in September 2013, as <br />indicated by our weekly compaction testing and observation reports. CDWA Pile No. 2 <br />appears to be stable and in good condition for winter storage until processing operations <br />begin again in spring 2014. <br />1i=.. <br />On -going monitoring of inclinometers and piezometers at CWDA No. 2 provides an <br />indication of the stability of the refuse as well as an indication of probable performance <br />for other refuse piles at Bowie. For these reasons, we recommend continued monitoring <br />of this instrumentation on a quarterly basis. We sincerely appreciate the opportunity to <br />work with you on this project. If you have any questions regarding this letter or the <br />instrumentation monitoring at CWDA No. 2, please don't hesitate to contact me at (970) <br />497 -8852 or danCa buckhorn_ eq o.com. <br />Sincerely, <br />BUCKHORN GEOTECH, INC. <br />3 f3 3 3 <br />L <br />e <br />l9 - <br />Daniel C. Quigley, P.E) moo,,.°• xael�l: <br />p�Fe oeaeoe �.� <br />N A1. <br />Enclosures: Instrumentation Site Plan, Inclinometer Cumulative Displacements, Summary of <br />Pore Pressure Monitoring <br />cc: Jim Stover, J.E. Stover and Associates — ELECTRONICALLY ONLY <br />2013- REVISED 4111 Quarter Monitoring Report PN #05- 126 -GEO <br />Page 4 of 6 <br />