2008-03-03_PERMIT FILE - C2006085A ‎(2)‎

• Permit No: C2006085A
• IBM Index Class Name: Permit File
• Doc Date: 3/3/2008
• Section_Exhibit Name: 2.05 Operation and Reclamation Plans
• Media Type: D
• Archive: Yes

- Facility Septic System
Description:s of facilities and structures listed above are presented in
the following sections.
Mine Portals
Northfield v~rill construct a single tunnel from the surface through
overburden strata. to intercept the coal seam which lies approximately
300 feet vertically below the surface. The tunnel is shown in cross-
sectional foirmat on Figure 2.05.3-3. This opening will be mined
downward at a slope of approximately 16 degrees from horizontal. At
this angle, t:he total length of the slope will be approximately 1,100
feet from ground level to the Ocean Wave seam. Portal development
will begin by excavating alluvial material and expose competent rock to
begin mining the decline. The alluvial materials will be temporarily
stockpiled and subsequently used as backfill around the concrete portal
structure acid for fill material on the mine facility bench area. The
excavated materials from the slope development will be temporarily
stockpiled during development of the decline. This material will
- ----subseq-gently-be moved-and-placed-~o-for-m-portions-of-the-facilities
bench area. Material volumes and placement details regarding the use
of the excavated alluvial and development materials are described in
• later in this section under "Coal Mine Waste and Non-Coal Processing
Waste".
The portal structure will include concrete foundations and slabs with
steel support members to provide ground control at the mouth of the
opening for the long-term protection for personnel and equipment.
Concrete retraining walls will adjoin the portal within the open ramp
area at the mouth of the opening. These retaining walls will angle
away slightly from the alignment of the decline for structural stability.
The area behind the wing walls will be backfilled with the
aforementioined excavation materials. General construction and
dimensional information for the portal area is provided on Table
2.05.3-2.
The decline entry will be divided with a substantially constructed
vertical partition wall extending from the surface to the coal seam. This
partition will effectively separate the decline into two separate
openings into the mine; one for fresh air mine intake and access of
personnel and equipment, the other containing the conveyor belt for
coal haulage. Construction of the partition will also provide additional
structural support of the roof of the decline for long-term stability.

2.05.3-10 Revised 5/01/07