2019-05-24_PERMIT FILE - M2019027 ‎(2)‎

• Permit No: M2019027
• IBM Index Class Name: PERMIT FILE
• Doc Date: 5/24/2019
• Doc Name: Application
• From: Colorado Sand Company
• To: DRMS
• Email Name: PSH
• Email Name: MAC
• Media Type: D
• Archive: No

FIGURE C-2 c-45
N
Phase 1:PRE-STRIPPING Growth medium will be removed at 12-inches Phase 3:MINEPIT Once ROM stockpile 2 has been depleted,the
below the surface and stockpiled on the site for main mine pit will start to be excavated. This
reclamation at the end of the project at location material will continue replenishing ROM
TS-1A. The main growth medium removal area stockpile 1 and fed to the wet plant. Again,
shown on the left represents the area of the fines I during this process the fines recovery pit will
recovery pit and the main mine pit. Additional continue to be slowly filled with fine material from
growth medium will be removed from the the system.
IL-71 perimeter road area(s)to allow for road base
material to be placed and compacted to support
rowt site traffic. The planned growth medium
ediu stockpile is estimated at 7,800 CY. Internal mine Main Mine Pit
tockpil roads may require the stockpiling of 1,700 CY of
additional material, and this material will be side
TS 1A cast adjacent to the roads to build the safety o
berms as needed. TS-1A
Phase 2:PLANT The fines recovery pit will be excavated and _ Phase 4:CLOSURE Once all equipment has been removed from the
ROM stock ile 1 material will be placed in ROM stockpiles 1 and site, site reclamation will begin and the growth
ROM stockpile 2. The wet plant will be fed from medium stockpile will be spread over the pit
Fines
ROM stockpile 1. During this time the fines i areas.
I recovery pit will slowly be filled with fine material
recovery from the washing process. The fines recovery
pit i pit has an estimated volume of 43,000 CY, and
based on estimated yield, the material entering
the fines recovery pit is estimated at 38,000 CY
(13% safety factor). The remaining volume is to I
ROM i be utilized as storm water retention and sufficient
stockpile 2 I freeboard. The Main Mine Pit may also be used
�. for storm water retention.
TS-1 A o
Pit Section Views Section A-A view
n ` 235' —235' 3:1
I 500' slope
Section B-B view
ection C-C
25'
o a
N
o I 3:1
N
U) I 575' slope
Section C-C view
o Section B-B I 25
j o 3:1
U1 slope
275'
Cl)l
Ill Scale (1/256 in = 1 ft)
I
U
NI 200 ft 400 ft 600 ft 806 ft 1000 ft 1,060 ft
1
L� DATE 24 2019 PROJECT TITLE PROJECT NO.
I \/ A I O PROGRAMNGCONSUEM SCALESAND 181001
O X (J\� C MINE DEVELOPMENT
ENGINEERING CONSULTING NOTED
O SPECIALDISTRICTS DRAWN CBS FRAC SAND PLANT FIGURE NO.
SCHEDIO GROUP
°O Keenesburg Project—Limited Impact 110 Application_May 24,2019 REVISION 1 C-2