PERMFILE128342

• Permit No: M1988112
• IBM Index Class Name: Permit File
• Doc Date: 11/8/1988
• Section_Exhibit Name: EXHIBIT D MINE PLAN
• Media Type: D
• Archive: No

' If
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seepage management operat
ons in
icate that t
ere is
a potential for large volumes of seepage which aay affect the
long-term stability of the rock buttress, a low permeability
barrier such as a slurry wall will be installed through the
1 alluvium and keyed into the surrounding Santa Fe Conglomerate
to cut-off seepage through the alluvium. Preliminary designs
t are discussed in Section E.3.1.
D.3 Waste Rock Disoosal

D.3.1 General
I
The six proposed waste rock disposal site:; are located
' as shown on the General Facilities Arrangement, Figure C-2.
The waste rock disposal facilities have been sized to hold a
' minimum of 22,500,000 tons of waste rock at an assumed average
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rock disposal areas are located north of the Rita Seca. The
sixth waste rock disposal area, which is also the largest, is
located to the south of the Rito Seco and immediately north
of the millsite. The southern waste rock disposal area will
also include an area for disposal of dewatered tailings in
' conjunction with waste rock materials.
' The waste rock disposal facilities have been designed
with slope angles of 33.5 degrees from the horizontal plane
or 1.5H:1V. In practice, the waste rock will be end dumped in
50-ft maximum lifts and will assume a slope equal to the angle
of repose for the waste rock material. Upon final^eclamation,
' the outslopes will be adjusted by grading to a 3H:1V overall
slope broken by 15-ft dozer width benches every 50 ft in
vertical height. Figures C-2, D.3-1 and D.3-2 show the waste
rock disposal areas in plan view. Figure D.3-3 shows a cross-
' sectional view of the southern waste rock disposal area.
' D-9 (Revised 4/20/89)