REVISION - 3/31/2009, 2:53:54 PM-JWD

• Permit No: P2008043
• IBM Index Class Name: REVISION
• Doc Date: 3/31/2009
• Doc Name: Receipt of NOI Modification
• From: DRMS
• To: Powertech ‎(USA)‎ Inc.
• Type & Sequence: MD2
• Email Name: ACS
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF RECLAMATION, MINING AND SAFETY
Department of Natural Resources
1313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
March 31, 2009
Mr. Richard Blubaugh
NON CONFIDENTIAL

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