2005-10-11_REVISION - M2000016

• Permit No: M2000016
• IBM Index Class Name: Revision
• Doc Date: 10/11/2005
• Doc Name: Adequacy Review no. 7
• From: DMG
• To: Lafarge West Inc
• Type & Sequence: AM1
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAx: [phone]
October 11, 2005
Mr. Eric Reckentine
Lafazge West, Inc.
10170 Church Ranch Way, Suite 200
Westminster, CO 80021
RE: Lafarge West, Inc., File No. M-2000-016
Riverbend Operation 112(c) Amendment Application (AM-Ol )
Deaz Mr. Reckentine:
v
Adequacy Review #7
COLORADO
DIVISION O F
MINERALS
GEOLOGY
EEC EA NAT,ON•NININO
SAf ETY•ECIENCE
Bill Owens
Governor
Russell George
Executive Direcor
Ronald W. Camarry
Division Director
Natural Resource Trustee
Listed below are adequacy review comments for the Riverbend Operation 112 (c) Amendment (AM-01)
Application, File No. M-2000-016. The Division of Minerals and Geology ("Division") is required to make a
recommendation decision no later than October 27, 2005, therefore, your response to the following adequacy
review concerns should be submitted to the Division as soon as possible.
Rule 6.4.7 Exhibit G -Water Information
In an attempt to fulfill the requirements of Rule 3.1.6 (1) of the Construction Material Rules and Regulations,
which requires that disturbances to the prevailing hydrologic balance of the affected land and to the
surrounding azea and to the quantity and quality of water in surface and groundwater systems both during and
after the mining operation and during reclamation shall be minimized, the division has been working with
Lafarge and Tetratech RMC to establish a monitoring plan that should protect the interests of well owners and
vegetation in the area of the project. On October 6, 2005, a meeting was held at the Denver office of the
DMG to address these issues. A monitoring plan with mutually agreed upon monitoring well locations and
time schedules relative to mining at the site was established. Please submit the monitoring plan established as
a result of this meeting.
2. In a letter from Tetra Tech RMC addressed to Carl Mount (DMG) titled "Sixth Adequacy Review Response,
Lafazge West, Inc. Riverbend Operation 112(c) Permit Amendment Ol, Permit no. M-2000-016," Tetra Tech
states under numerous circumstances that agreements between owners of man-made structures and Lafazge
West, Inc. will be submitted to the Division as they aze received. Specifically: item #3 refers to an agreement
with the owner of well 13697; item #4 refers to an agreement with the owner of well; item #10 refers to 600-
foot well spacing agreements, and; item #12 refers to signed agreements with the Lupton Bottom Ditch
Company and the Brighton Ditch Company. The Division, at the recommendation of the Attorney General's
Office, requires that these documents be submitted prior to approval of this amendment. Please submit the
required documents.
3. The Division of Minerals and Geology is consulting with a representative of the Attorney General Office to
determine whether the Division can approve of language contained under the 5's bullet of the "Wells" section
of attachment A to the 6s' Adequacy Review Responses and will forward those comments to LaFazge as soon
as they are received.
Office of Office of Colorado
Mined Land Reclamation Active and Inactive Mines Geological Survey