2011-06-28_PERMIT FILE - M2011001

• Permit No: M2011001
• IBM Index Class Name: PERMIT FILE
• Doc Date: 6/28/2011
• Doc Name: Third Adequacy Review
• From: DRMS
• To: Lafarge West, Inc.
• Email Name: PSH
• Email Name: AJW
• Media Type: D
• Archive: No

"DIVISION OF RECLAMATION, MINING AND SAFETY
Department of Natural Resources
1313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
I�ne28,2011
Mr. Todd Ohliheiser
/afarge West, Inc.
10170 Church Ranch Way, Suite 200
Westminster, Colorado 80021
be
RE: Lafarge West, Inc.; File No. M- 2011 -001
Iverson Mine; 112c Permit Application Third Adequacy Review
Dear Mr. Ohliheiser,
The Division of Reclamation, Mining and Safety (Division) has reviewed the content of the Lafarge
West, Inc. (Lafarge) 112c permit application adequacy response dated June 6, 2011 for the Iverson
Mine, File No. M- 2011 -001, and submits the following comments. The Division is required to make
an approval or denial decision no later than July 25, 2011 therefore; a response to the following
adequacy review concerns should be submitted to the Division as soon as possible.
6.4.4 Exhibit D - Mining Plan
1. In response to Question #16 from the April 1, 2011 adequacy letter, Tetra Tech conducted a
site visit to reevaluate the impact flow of the Cache la Poudre River may have on the
Iverson Mine. As a result, the mining limits were revised to a 200 foot set back from the top
of bank where the pit side of the river is adjacent to the erosive side of the river and a 100
foot set back from the top of bank where the pit side of the river is adjacent to the
depositional side of the river. The revised mining offsets from the Cache la Poudre River are
acceptable to the Division, however the Applicant must indicate on the Mining Plan Map
where the 100/200 foot offset transition points begin and end.
6.4.5 Exhibit E - Reclamation Plan
2. The revised Reclamation Plan received on June 6, 2011 did not include the Applicant's
commitment to eradicate the Russian Olives at the site upon commencement of operations
from the April 29, 2011 adequacy response letter from Tetra Tech. Please revise Exhibit E to
indicate the previous commitment by the Applicant.
3. Tetra Tech recommended inflow and outflow spillways be installed in conjunction with site
reclamation to control the manner in which high river flows impact the site. The installation
of the spillways during reclamation is acceptable to the Division as Tong as the proposed
sequence of mining and reclamation progressing from the southeast corner, center, north
end and southwest corner is followed. If the sequence is altered and the southwest portion
is not mined last, the spillway structures must be installed after the southern portions of
the site have been mined and reclaimed.
Office of
Mined Land Reclamation Denver • Grand Junction • Durango
STATE OF COLORADO
Psi
COLORADO
D I V I S I O N O F
RECLAMATION
MINING
— &—
SAFETY
John W. Hickenlooper
Governor
Mike King
Executive Director
Loretta Pirieda
Director
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(4)
Office of
Active and Inactive Mines