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Environmental Consulrnnts, lnc. <br />March 9, 2000 <br />Mr. Kent Gorham <br />Senior Environmental Protection Specialist <br />Division ofMinerals and Geology <br />215 Centennial Building <br />1313 Sherman Street <br />Denver- CO 80203-2273 <br />RE: 1999 Annual Hydrology Report <br />New Elk Mine (Permit C-S1-012) <br />Dear Mr. Gorham: <br />RECEIVED <br />MAR 10 2000 <br />p}hsion of Minerals >ti ~o~ <br />By this letter, Picketwire Processing, LLC hereby submits two (2) copies of the1999 Annual <br />Hydrology Report for the New Elk Mine. This report includes data collected throughout the year <br />as well as information and clarification requested by the Division in letters dated August 20, August <br />27, and December 9, 1999. As per flow data collected on the Purgatoire River, inconsistent flow <br />measurements are primarily caused by the rough nature of the channel bottom and differences in <br />the cross section being measured. These factors influence the accuracy of the Global Flow Probe <br />that is used to measure stream velocity. Also, mapping.of monitoring stations is better presented <br />on the Regional Hydrology Map in the Permit Document (Map 8), now referenced in the AHR. The <br />Division should also note that Alluvial Wel] PAW-2 is not located 30 feet from Alluvial Well PAW- <br />1 on the southwest comer of the Waste Development Pile, but is located on the southeast comer of <br />the Pile to monitordowndipeffectsofthePile(approximately200yardseastofPAW-l as described <br />in the report). There is a second alluvial well located approximately 30 feet from PAW-1, however, <br />this well is not in the monitoring program. <br />Should you have questions or need additional information concerning this report, please do not <br />hesitate to le[ me know. <br />Sincerely, <br />V '~ X.~ <br />Jerry H. Koblitz <br />Principal <br />cc Mr. Al Perry - Picke[wire <br />Mr. Ron Thompson -Peak <br />5231 South Quebec Street • Greenwood Village, Colorado 801 I I <br />Phone (303) 850-0930 • Faz (303) 721-9298 <br />Web Site: www.geystone-consultants.com • E-mail: greystone@greystone-consultanls.com <br />s .. , <br />