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STATE OF COLORADO <br />DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866-3567 <br />FAX: (303) 832-8106 <br />March 31, 2009 <br />Mr. Richard Blubaugh <br />NON CONFIDENTIAL <br /> <br />COLORADO <br />DIVISION OF <br />RECLAMATION <br />MINING <br />SA FETY <br />Bill Ritter, )r. <br />Governor <br />Harris D. Sherman <br />Executive Director <br />Powertech (USA) Inc.,,-- <br />Ronald Cattany <br />5575 DTC Parkway, Suite 140 <br />Division Director <br />or <br />Greenwood Village, CO 80111 Natural Resource Trustee <br />RE: Centennial Project, Receipt of Notice of Intent Modification MD-02, File No. P-2008-043 <br />Dear Mr. Blubaugh: <br />The Colorado Division of Reclamation, Mining, and Safety (DRMS) has received your proposed <br />modification MD-02 to Notice of Intent to Conduct Prospecting dated March 4, 2009. Our initial review <br />indicates that it is incomplete. Please address the following items at your earliest convenience bearing in <br />mind that if you have not addressed these items within sixty days of the date of this letter the DRMS may <br />terminate consideration of the proposed modification (Rule 5.1.3 of the Mineral Rules and Regulations of the <br />Mined Land Reclamation Board). <br />1. In section IV, item 5 of the modification form, it is stated that disturbed areas will be seeded at the <br />conclusion of grading operations. To maximize the potential for vegetation success, the DRMS will require <br />seeding be done in November or in April, with November being the preferred option. Please commit to these <br />seeding windows. <br />2. The dilution calculation table included in Attachment E to MD-02 incorrectly lists the water quality data <br />report dates for wells IS-003T and IS-003Ta as the sample correction dates. Please provide a corrected table. <br />3. In order to allow the aquifer testing and allow the pit disposal of water pumped to the surface during <br />aquifer testing as proposed in MD-02, DRMS must make a determination that impacts to the hydrologic <br />balance will be minimized and that ground water standards will be met. In order to evaluate the potential for <br />impacts to the uppermost aquifer below the proposed water disposal pit, the following information is needed: <br />a. Drilling, completion, and development reports for wells IS-003T and IS-003Ta. <br />b. Ground flow direction and gradient for the uppermost aquifer with a full discussion of the sources of <br />information used to determine the flow direction and gradient. Include well reports for the wells used to <br />determine flow direction and gradient along with the field notes for the pertinent water table and <br />piezometric surface elevation measurements that were made. <br />Provide the location information for all wells within two miles of the proposed pit. For wells in this zone <br />drilled or rehabilitated by Powertech, provide drilling, completion, and development reports. For any <br />other wells in this zone, provide drilling, completion, and development reports available from the public <br />records of the Office of the State Engineer. Provide all available water quality information for wells in <br />Office of Office of <br />Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines