PERMFILE61041

• Permit No: M2006018
• IBM Index Class Name: PERMIT FILE
• Doc Date: 5/19/2006
• Doc Name: Adequacy Response
• From: Gustavson Associates
• To: DMG
• Media Type: D
• Archive: No

6. As shown on our reclamation bond calculation in EXHIBIT L, we have assumed a
maximum disturbance of 50 acres. As presented in EXHIBIT D, Cell A will be divided roughly
into 2 phases, which we believe will keep the disturbance around 35 acres, but for conservative
reasons, we have calculated a bond amount based on 50 acres. Once sufficient area has been
developed in Cell A so as not to interfere with mining, any future stripping will be immediately
placed back into the mined portions of Cell A. As the overburden is placed into the mined out
areas of a given cell, it will be graded with a dozer to the reclaim slope angles and reseeded as
soon as possible. This will allow all of the upland areas (area above the final water level of the
lakes) to begin to be revegetated almost immediately after mining is completed. This will both
minimize the need for large stockpiles of overburden and re-handle of material. As mining of
Cell A is being completed, Cell B will be stripped. This initial overburden from Cell B will be
placed into Cell A as the final reclamation.
A conservative estimate of the maximum acreage that might have to be dewatered should
Lafarge not complete mining would be all of Cell A. This would amount to 47 acres.
EXHIBIT E -RECLAMATION PLAN
The owner has agreed to change the post-mining land use to rangeland.
8. Lafarge is not opposed to using the excess overburden for development of coves, shelves,
shallow areas, etc. Lafarge will work with the property owner to incorporate these comments
into the reclamation plan in a manner that will be beneficial to both the owner and wildlife.
9. Since the site will generate excess overburden material, Lafarge has no objection to
increasing the depth of replacement overburden to 24 inches.
]0. Lafarge has no objections to amending the seed mixture to the one your provided,
assuming that the Book Cliff Soil Conservation District has no objections.
6.4.6 EXHIBIT F -Reclamation Plan Map
11. Lafarge has no objections to revising the map to show these areas. In general, they occur
along the waters edge and are defined as being twelve inches below to six inches above.
6.4.7 EXHIBIT G -Water Information
12. Lafarge is currently in the process Attached to the back of this response is a letter
specifically addressing the water well issues. Lafarge would be pleased to:
a) provide copies of these permits to the DMG when they are issued,
b) if required, complete a TR should any significant changes be requested by the
approving agencies, and
5757 Central Avenue ~ Phone [phone]
Boulder, Colorado 80301 GUS7wy50N ASSOCIATES Fax: [phone]