2020-05-13_PERMIT FILE - M2020022

• Permit No: M2020022
• IBM Index Class Name: PERMIT FILE
• Doc Date: 5/13/2020
• Doc Name: Adequacy Review Response
• From: Environment, Inc.
• To: DRMS
• Email Name: DC1
• Media Type: D
• Archive: No

MINING PLAN(CONT) EXHIBIT C
east, north and west slopes that are not daylighted out will be
graded 3 : 1 and the south slope below the mine floor will remain
in its natural state . No blasting will take place in this mine .
Once the south face is opened, mining will progress along a
near vertical working face that stretched across the permit from
east to west as it is worked north into the mesa . Along the
sides that will have slopes, a 10 foot mining limit setback line
will be established by grading a ditch parallel to the permit
line . This line will become the top of the finished slope . From
here the 3h to lv slopes will be constructed into the mine to
reclaim and stabilize the edges of the mine .
The sloping will be done one of two ways, either using a
cut/fill technique or the slope will be mined along a 3 : 1 grade .
If the cut/fill option is used, a second line called the Vertical
Face Limit line will be established 53 feet from the top of slope
line . This line will represent the minimum distance that the
near vertical working face can get to the top of slope line and
still leave material to created the 3 : 1 slope . The material
between the setback ditch and the Vertical Face Limit line will
be cut/fill pushed into the mined area to create the lower half
of the 3h to 1 slope .
Grading and shaping will run concurrent with mining so that
if mining ended prematurely only 400 feet or less would need
cut/filling and 480 feet would need partial grading and shaping,
as shown on MINING PLAN MAP-EXHIBIT E-2
Of the 9 . 93 acres ± in the permit area, approximately 9 . 33
acres ± will be mined and 0 . 60 acres ± will be setbacks around
the mined area . These setbacks are shown on Map Exhibit E-2 and
are 10 feet wide except along the south side where the setback
will be vary depending on the final floor elevation. Plans are
to eventually expand the permit area to cover the entire mesa to
the north and east . The smaller setbacks are used to maximize
the reserves that can be removed during this first stage of
permitting.
The sand and gravel will be excavated using frontend load-
ers, track-hoes and dozers . Much of the material will be removed
as pit run with no processing taking place . In the future some
processing will be done on site where screening, crushing and
stockpiling will be done on the mines floor . Processing will be
done to build material stockpiles that will be removed as needed.
The processing plant will be placed close to the mines working
face each time it is moved in, so the plant site and stockpile
area will follow mining . Mining will be done by loading material
from the working face into the processing plant or trucks with a
frontend loader. As the deposit deepens we may begin to push
material from the upper reaches of the mine to the floor . The
RECLAMATION PLAN MAP- E-3 shows how we think the area will look when
mining ends and reclamation is complete .
On-site equipment may include, but is not limited to, a
motor grader, front-end loaders, motor scrapers, a dozer, convey-
AUSTIN& BETSY CLENNIN- BECKER PIT May 7, 2020
22