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April 17, 2003 ireracon <br /> r <br /> 301 North Howes•P.O.Box 503 <br /> Fort Collins,Colorado 80521-0503 <br /> Connell Resources, Inc. (970)484-0359 Fax:(970)484-0454 <br /> 4305 East Harmony Road <br /> Fort Collins, Colorado 80525 <br /> Attn: Mr. William Welch <br /> Re: Proposed Timnath - Connell Pit <br /> Bi-Monthly Groundwater Monitoring Episodes <br /> Terracon Project No. 20985110 <br /> Dear Mr. Welch, <br /> On April 7, April 8, and October 4, 1999, Terracon installed nine piezometers for the above referenced project as <br /> requested for purposes of monitoring the groundwater levels during the mining and extraction operations. Terracon <br /> has been requested to monitor the groundwater levels on a bi-monthly basis until further notice. Piezometer Nos. 1 <br /> and 2 were damaged in the spring of 2001 and were reinstalled on January 25, 2002. The following table shows <br /> the depth of where groundwater was measured from the ground surface elevations for Piezometer Nos. 2 through <br /> 9, for the six most current monitoring episodes. Beginning on April 17, 2003, Piezometer No. 1 was measured from <br /> top of pipe due to grading operations that were performed in this area of the site. <br /> Monitoring Dates Depth of Groundwater Below Ground Surface (ft) <br /> . <br /> 1 2 3 4 5 6 7 8 9 <br /> October 31, 2002 5.7 7.0 6.3 5.3 2.2 4.0 3.6 2.8 5.3 <br /> November 29, 2002 6.1 7.5 6.5 6.3 2.1 4.0 3.7 3.2 5.4 <br /> December 23, 2002 6.4 7.9 6.8 6.6 2.3 4.2 3.9 3.3 5.5 <br /> January 27, 2003 8.5 8.6 6.9 6.8 1 2.4 4.2 3.9 3.5 5.4 <br /> February 25, 2003 6.6 8.1 6.9 7.0 2.9 4.4 4.2 3.7 5.4 <br /> April 17, 2003 8.2 6.6 6.5 6.9 2.5 4.2 4.0 3.4 4.6 <br /> Terracon will continue to monitor the piezometers indefinitely until further notice as requested. If you have any <br /> questions or require further information, please feel free to contact us at your convenience. <br /> Sincerely, <br /> TERRACON <br /> David A. Richer, P.E. <br /> Geotechnical Engineer/Department Manager <br /> Copies to: Addressee (3) <br /> Tuttle-Applegate, Inc. (1): Mr. William Schenderlein <br /> Arizona■Arkansas■California■Colorado■Georgia■Idaho■Illinois■Iowa■Kansas■Kentucky■Minnesota■Missouri <br /> Montana■Nebraska■Nevada■New Mexico■North Carolina■Oklahoma 0 Tennessee■Texas■Utah■Wisconsin■Wyoming <br /> Consulting Engineers&Scientists Since 1965 <br /> www.terracon.com <br />