REV106476

• Permit No: C1981025
• IBM Index Class Name: Revision
• Doc Date: 8/3/1992
• Doc Name: NORTH THOMPSON CREEK MINE C-81-025 PRELIMINARY ADEQUACY REVIEW OF TR 13
• From: MLRD
• To: MINREC INC
• Type & Sequence: TR13
• Media Type: D
• Archive: No

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MINED LAND RECLA~1ATi0PJ Df'JJSION
Department of Na[ural Resources
1313 Sherman SI.. Room 2t S
Denver. CO 80203
303 866-3567
FA x. 303 632-8106
Roy Romer,
Governor
August 3, 1992
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Attn: James Stover
Minrec, Inc.
2768 Compass Drive
Grand Junction, CO 81506
Re: North Thompson Creek Mine (C-81-025)
Review of Technical Revision 13
Dear Mr. Stover:
Michael B. Long,
Division Director
Preliminary Adequacy
The new Office of Mined Land Reclamation (OMLR) has completed its
initial review of this application and has identified the following
issues of concern which need to be addressed before TR 13 can be
approved.
Regarding the reclamation of the portal area; the portals need
to be backfilled in compliance with Rule 4.07.3 and MSHA
requirements.
a. MSHA needs to be contacted by the operator to determine
the type of permanent seal and amount of backfilling that
is acceptable.The standard usually involves 25 feet of
backfilled material in front of the portal seals.
b. Following MSHA approval, the Office and the operator need
to agree on a plan for reclamation of the portal area
which essentially would involve removal of all above-
ground structures not required for operation or
maintenance of the water treatment system, backfilling of
the portals as required by MSHA (allowing for the water
treatment system), and topsoil application (if available)
and revegetation.
c. Both the topsoil pile and reexcavated material pile
should be used in the portal reclamation. If the
treatment system is to be permanent, then the only future
use for the tcpsoil would be for reclamation of the
sediment ponds and possibly, the access road.
d. The OMLR deems the retention of the bridge to be
appropriate, since it provides access to the portal area
for system maintenance.