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= <br />July 1, 2014 <br />Civil, Structural & Geotechnical Engineers <br />222 South Park Ave. • Montrose. C�) 8140 t <br />Ph.. (970) 249 -6828 • FAX. (970) 249 -0945 <br />H udd leston- Berry Engineering and Testing, LLC <br />640 White Avenue <br />Grand Junction, CO 81501 <br />Attention: Mike Berry, PE <br />SUBJECT: 2nd Quarter Summary of Inclinometer and Vibrating Wire <br />Piezometer Data June 2014, Bowie Mine No. 2, Coal Waste <br />Disposal Area No. 2 <br />Dear Mr. Berry, <br />Buckhorn Geotech, Inc. (BGI) conducted quarterly monitoring of inclinometers and <br />vibrating wire piezometers on June 29, 2014 at Coal Waste Disposal Area No. 2 (CWDA <br />No. 2) for Bowie Resources, LLC (Bowie). This report covers the time period of April <br />through June 2014. <br />Vibratina Wire Line Piezometers <br />Table 1. Summary of Functional VWP Pore Pressures <br />VWP ID # <br />Initial Pore <br />Pressure <br />(psi) <br />5/21/14 Pore <br />Pressure <br />(psi) <br />6/29/14 Pore <br />Pressure <br />(psi) <br />Difference <br />Since <br />Installation <br />(psi) <br />Difference <br />Since Last <br />Reading <br />(psi) <br />VWP -05 <br />6.8 <br />1.9 <br />2.0 <br />-4.8 <br />+0.1 <br />VWP -06 <br />11.3 <br />14.8 <br />16.0 <br />+4.7 <br />+1.2 <br />VWP -08 <br />8.2 <br />8.9 <br />9.2 <br />+1.0 <br />+0.3 <br />VWP -09 <br />2.8 <br />2.8 <br />2.8 <br />0 <br />0 <br />VWP -10 <br />-1.9 <br />-1.9 <br />-1.9 <br />0 <br />0 <br />The physical locations of the piezometers are shown on the attached Instrumentation <br />Site Plan, Drawing 1. The graph of historical data through 5 -21 -14 is presented for <br />reference as Figure 1. A graph of active piezometers only is presented as Figure 2. <br />Inclinometers <br />Three inclinometers, designated BG05 -04, BG05 -05, and BG05 -07, were installed at <br />CWDA No. 2 in August 2005. The inclinometers were installed through the coal refuse <br />and approximately 20 feet into the native foundation soils. The physical locations of the <br />inclinometers are shown on the attached Instrumentation Site Plan, Drawing 1. Baseline <br />readings were taken on 8/10/05 and subsequent readings have generally been taken <br />June 2014 Q2 Instrumentation Report-7-1-14 PN #13- 231 -001 <br />Page 1 of 2 <br />