PERMFILE46438

• Permit No: M1999058
• IBM Index Class Name: Permit File
• Doc Name: RECLAMATION PLAN
• Section_Exhibit Name: EXHIBIT D
• Media Type: D
• Archive: No

EXHIBIT D: RECLAMATION PLAN
(a) Overburden: The Yule Quarry is and underground operation. The seam of marble
is 300 feet thick and is entirely exposed at the surface. No overburden removal or backfilling of
the underground excavations is anticipated. It is anticipated that the north and middle quarry
entries will be left open and unchanged from their current condition. The south quarry entry will
also remain open, but a new portal has been opened on the south wall of this entry. The quarry
portal driven by CYMC in 1990, the entry driven in the south wall of the south quarry entry, the
small utility tunnel and any new quarry entries will be backfilled to prevent public access to
underground workings.
(b) Waste Pile Slopes: The effective overall
slope of the final surface of the waste piles is to 2:1
(horizontal: vertical). This slope is lower than the
slopes of the existing waste piles that have proven to
be stable for the 49 years between 1941 and 1990
when the quarry was inactive. It is Sierra's position
that a geotechnical study of the waste pile slopes is not
necessary. Such a study would rely almost solely on
the history of the existing waste piles. Based on this
history, very reliable data is available upon which to
base plaru~ed final waste pile slopes. The slopes are
consistent with the existing natural topography and
will blend well in the mountain terrain. The photo at
right, taken in 1988, shows the upper waste pile left
from pre-1941 operations. Sierra will continually
monitor existing and new waste pile slopes. If
significant unstable conditions develop, corrective
stabilization actions will be taken, either by reducing
the slopes or through mechanical stabilization
methods. As outlined in the Mining Plan section
above, Sierra plans to deposit new waste to the piles so
the final slope in these new areas does not exceed 2:1.
The contour maps on the following page show the
current contours of the waste pile areas and an estimate
for the maximum extent of the waste piles post
reclamation. The final contours were estimated based
on a maximum 2: l final slope. The volume created by
the maximum extent of the waste piles is estimated. at 159,000 cubic yards. Assuming a density
of 1.5 tons per cubic yazd results in a waste pile capacity of 240,000 short tons, well in excess of
the total amount of waste to be generated over the life of planned operation. Initially, waste
blocks will be placed to the east and south of the existing waste piles, being careful to not impact
any area where CYMC may have caused a violation of its permit. Also, no fines will be placed
on the waste piles until an effective sediment control structure is established. Once a suitable
sediment control structure is established, Sierra will begin to deposit waste neaz the north end of
Permit N ber ~-~ - Q~- n S L
Class: ermit
sectionlExhibit _ ~ ~ `U}~ C L~- ~ ~~~,I D ~.) 22
Class: ^ Revision
i TYPe/Seq _ - - - - - -~ I IIIIII VIII VIII VIII VIII II II IIII IIII
Class: ^ Report ^ Hydro ^General
Doc Type. ~urN~ P ~