2007-01-08_REVISION - M1979097

• Permit No: M1979097
• IBM Index Class Name: Revision
• Doc Date: 1/8/2007
• Doc Name: TR Request
• From: Lafarge West, Inc.
• To: DRMS
• Type & Sequence: TR4
• Media Type: D
• Archive: No

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LAFARGE
NORTH AMERICA
Construction Materials
January 8, 2007
RECEI~/~D
JAN 0 8 2001 ~
DivMin ngfandcSafety nv
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Mr. Chris Rowe
Environmental Protection Specialist ~/ G!~ ~ ~- ~ ~~
Division of Minerals and Geology
1313 Sherman Street, Room 215 .i~_ Q q"'
Denver, Colorado 80203
Re: Lafarge North America / `ze~~ e.~
East Rigden Pit; Permit No. M-1979-097; Technical Revision 4
Dear Chris:
On behalf of Lafarge North America (Lafarge), we are requesting a Technical Revision (TR-4) to
the East Rigden Pit, Permit No. M-1979-097. The Technical Revision will allow for transport of
material from the recently approved Shields at Fossil Creek Mine (M-2006-064) to the East
Rigden site for processing. Lafarge will connect to the overhead conveyor belt that will cross E.
Horsetooth Road and continue northwesterly from the south end of the East Rigden site to the
existing processing facility on the East Rigden site.
We believe this change is minor and constitutes a Technical Revision and have enclosed a map,
(Attachment A), showing the approximate location of the conveyor belt system for your review.
The East Rigden Pit permit includes 300 affected acres and was approved for the use of a
conveyor belt (please refer to Attachments B and C). The portion of the East Rigden site that
will be traversed by the proposed conveyor belt was not disturbed as part of the original mining;
however, it was included in the mining boundary. It has remained pasture grass throughout the
duration of the active mine. Therefore, a Technical Revision for use of a conveyor belt across
this portion of the mine will have no affect on the approved Reclamation Plan.
The proposed duration of mining for the Shields property is short term (3-5 years). The conveyor
belt on the East Rigden site will be removed upon completion of the Shields mine.
Any grading or reseeding required once the conveyor is removed will be done at that time.
The conveyor belt will cross a City of Fort Collins easement for a flood control drainage swale.
Prior to submitting this Technical Revision application, we met with representatives of the City
of Fort Collins to review this issue. They have no objection to the crossing provided that Lafarge
leaves adequate groundcover when removing the overhead conveyor bridge across E. Horsetooth
LAFARGE WEST INC. ~ Lafarge Construction Materials
1800 N. Taft Hill Road
Fort Collins, Colorado 80552
Office: 970-407-3600 Fax [phone]