2020-06-29_PERMIT FILE - M2020007 ‎(3)‎

• Permit No: M2020007
• IBM Index Class Name: Permit File
• Doc Date: 6/29/2020
• Doc Name: Adequacy Review Response #3
• From: Environment, Inc.
• To: DRMS
• Email Name: ECS
• Media Type: D
• Archive: No

EXHIBIT L
RECLAMATION COSTS (revised 6125/2020)
The following information is provided to evaluate the amount
of bond needed when mining has reaches a point where L.G.
Everist, Inc . has Phases 1, lA and 3 disturbed in some form or
another. The numbers presented for each Phase are based on what
is estimated to be disturbed at the time when mining has impacted
much of those areas . At this mine, it will not be necessary to
import fill material to complete reclamation in Phase 1A, as
discussed in the Mining Plan. The RECLAMATION ACTIVITIES table
below shows the various items needed to reclaim the initial 3
phases once full production is taking place in that area . In
this scenario :
The first 4 tables are used in the Bond Cost Estimate but
each Phase represents the total cost to reclaim that Phase less
any activity that is not part of the Working Bond estimate for
this time period in the mine . The Floating Table has the costs
that will float from one Phase to the next as mining progresses .
The primary costs are the staging of the Bank Armoring in 1000
foot segments with a minimum of 2350 cubic yards of concrete
rubble stockpiled within 500 feet of the placement area, the
stripped area in front of the working face, yearly weed control
and final grading of a 2600 foot long working face using a
cut/fill method (5 . 65 cy/lft) . No dewatering cost is included
since we presume that the liner in Phase 1 will effectively seal
the mined area, so no dewatering is needed.
In Phase 1A, the slope will be mined 3h to lv so no
underwater sloping will be needed and this Phase can be
backfilled, without pumping the water, to a point 2 ft above the
average ground water table . No ground water will be exposed in
Phase 3 while it is being used as the plant site area, so no
slurry wall will be installed until mining is planned for that
area.
Phase 1 is the active mining area . The cost to reclaim
would include all items shown in the Table for that Phase, less
the total armoring . As mining progresses, the items in the
Floating Costs table come into play. There are 30 acres stripped
in front of the working face that is 2600 ft long (5 . 65 yds/lft)
cut/fill sloping) .
All other slopes will be finished and armoring installed as
L.G.Everist,Inc. Ragsdale Reservoirs June 25,2020
L-1