20080868 Ver 2_Stratigraphy Study Addendum_20150623

WPotashCoro' PotashCorp -Aurora
Helping Nature Provide
Scanned E-mail
June 23, 2015
Ms. Karen Higgins
401 and Buffer Permitting Unit Supervisor
NC DENR — Division of Water Resources
512 N. Salisbury St, #942-E
Raleigh, NC 27604
Dear Ms. Higgins:
The NC Division of Water Quality (now Division of Water Resources) issued to PCS Phosphate
(PCS) 401 Certification No. 3771, DWQ 42008-0868 version 2.0 on January 15, 2009, for our
mine expansion in Beaufort County. Language within the second paragraph of Condition 9 of
the Certification, talking about the 1,145-foot wide mining corridor through the narrowest
portion of the Bonner-ton Non-Riverine Wet Hardwood Forest states: "The exact location of this
1,145 foot wide mining corridor shall be submitted to DWQ and the Corps for written approval."
When the Corps issued the 404 permit to PCS for Modified Alternative L on June 10, 2009, they
essentially approved the location of the mining corridor. However, in order to address this
condition with DWR, enclosed are three drawings showing the exact location of the mining
corridor. The biotic community map is the Modified Alternative 1, line from the 404 permit, and
the other two are aerial photos showing the now-surveyed permit boundary line.
Another portion of the second paragraph of Condition 9 states "In addition, a reclamation and
revegetation plan for the mining corridor shall be submitted to DWQ for written approval."
The narrow mining corridor just north of SR 1958 will be reclaimed beginning with a
detailed stratigraphy study to be done on both sides and throughout the area to be mined
in order to determine the presence, extent and permeability of any aquitards and
aquicludes within the mining corridor. A plan for the restoration of each of these
aquitards and aquicludes will be developed as appropriate. Groundwater monitoring will
be done before, during and after mining and restoration to ensure that restoration has
established reference hydrology for this site. The mine excavation within the corridor
will be backfilled with overburden, and a 1-2 foot layer of topsoil will be placed on top of
the overburden to bring the land surface back to natural grade. The details of the
overburden placement will be developed once the results of the stratigraphy study are
complete. Once the placement of topsoil is complete, the corridor will be planted with a
variety of native tree species. As the permit condition states, the mining corridor will be
restored and replanted within ten years of the initiation of mining preparation for the area.
1530 NC Hwy 306 South, Aurora, NC USA 27806 T [phone]
PotashCorp. I www.potashcorp.com

If you have any questions, please call me at [phone], or email at
ifurness(�t)csr)hos,t)hate.com. I look forward to your approval of these two permit conditions.
Sincerely,
L
C",
Je ey C. Furness
Senior Scientist
Enclosures
PC: Anthony Scarbraugh — DWR, Washington w/encl.
23-01-004-29
w/encl.
T.L. Baker
w/encl.
M. Brom
w/encl.
R. Smith
w/enel.
J. Pierce
w/encl.
R. Jenner
w/encl.
T. Cvetan
w/encl.

To 1s
�VRHAM CREEK
1,800 0
1
500 0
■�I...wri
BONNERTON BASE PROJECT AREA
MODIFIED ALT L — BONNERTON PROPOSED
IMPACT BOUNDARY 5/13/09
MODIFIED ALT L — BONNERTON PROPOSED IMPACT
BOUNDARY 5/13/09 — EXCAVATION LIMITS
RECOVERABLE CONCENTRATE = 33,478,000 TONS*
GREEKS /OPEN WATER
1A PUBLIC TRUST AREAS
1B PERENNIAL STREAM
— 1C INTERMITTENT STREAM
WETLAND BRACKISH MARSH COMPLEX
3 WETLAND BOTTOMLAND HARDWOOD FOREST
4 WETLAND HERBACEOUS ASSEMBLAGE
5 WETLAND SHRUB — SCRUB ASSEMBLAGE
6 WETLAND PINE PLANTATION
7 WETLAND HARDWOOD FOREST
8 WETLAND MIXED PINE — HARDWOOD FOREST
9 WETLAND PINE FOREST
10 WETLAND POCOS3N — BAY FOREST
11 WETLAND SAND RIDGE FOREST
12 POND
13 WETLAND MAINTAINED AREA
14 UPLAND HERBACEOUS ASSEMBLAGE
15 UPLAND SHRUB — SCRUB ASSEMBLAGE
16 UPLAND PINE PLANTATION
17 UPLAND HARDWOOD FOREST
18 UPLAND MIXED PINE — HARDWOOD FOREST
19 UPLAND PINE FOREST
20 UPLAND SAND RIDGE FOREST
21 UPLAND AGRICULTURAL LAND
22 UPLAND NON — VEGETATED /MAINTAINED AREA
71 WATERS OF THE US AREAS
DWETLAND AREAS (WITHOUT PONDS AND CREEKS)
UPLAND AREAS
*PROVIDED BY PCS PHOSPHATE 5/13/09
NOTE: BOUNDARY AS SHOWN INCLUDES DCM /LAMA AVOIDANCE
0 LF
2,533 LF
4,786 LF
ACRES
2,806
2,526
1,698
0
<1
4
0
51
45
274
206
369
463
208
264
22
<1
0
5
64
58
39
117
13
42
243
39
1,906
1.902
620
Biotic Communities
Modified Alternative L — Bonnerton
1,800 Feet PCS PHOSPHATE MINE CONTINUATION
Sc9le: Ag shown irawn by: BFG /TLJ
500 Meters Date: J/1 809 14/
BON_MCDALTL D51309(BON BC 030206)_.BIOTICS
AApproved b Revision:
pp }�• JP5 5 -13 -09

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Unowned Parcels

BONNERTON 7 -1 MINE
PERMIT MODIFICATION
BONNERTON 404 PERMIT
BOUNDARY
CURRENT MINE PERMIT 7 -1
PERMIT BOUNDARY
BONNERTON
MINING CORRIDOR
E 2 1 DATE 3,42015
SCALE IN FEET
a tu0n 29W
POTASHCORP- AURORA
BEAUFORT COUNTY, NC