20241002_ADI_Response

M=DEED=
Gunn=-LL
,. engineering &surveying, p.c.
P.O. Box 790
Cornelius, NC 28031
704-655-7290
September 18, 2024
Mr.Adam Pharr, PE
North Carolina Environmental Quality
Division of Energy, Mineral and Land Resources
512 N Salisbury Street, Fifth Floor
Raleigh, NC 27604
SUBJECT: Mine Permit Application-December 22, 2023 Review Letter
Keller Mining-Sand & Recycle
5830 Wallace Road
Rowan Co., Kannapolis, NC
MGES Project No. 220703.440
Dear Mr. Pharr:
On behalf of Keller Mining, MEADE GUNNELL Engineering, P.C. (MGE) re-submits the Mining Permit
Application with corrections to the plans and application as noted below:
1. Proof of notification to all adjoining landowner:
a) A copy of the returned receipts is included with this submittal. There were six non-responses and
three returned receipts. Daniel Hefner, Edward Goodman, and Joel Lewis were sent notifications on
February 23,2024 with no return signature cards.
2. Affected Acreage-Amendment Added Reserve Area
a) The Mine Permit Map and tables within application have been amended to add the haul road
connection at Wright Road, including the new haul road acreage and adding 27.2 acres of future reserves.
New property adjoiner notifications were sent out to add this area in the permit. .
3. Adjoining Landowners-Mine Map
a) Sheet C-200 shows all the surrounding property owners of the proposed mine site..
4. Haul Road and Permit Boundary
a) The proposed haul road is now shown on C-300 within the mine permit limits..
5. Mine Permit Boundary
a) The Mime Map has been updated.

6. Haul Road Buffer
a) The grading plan was revised and haul road moved to avoid conflicts (C-300)
7. Pond Discharge Barrel and Spillway
a) The Principal and Emergency Spillway is been moved to the other side of the road to avoid conflict.
8. Basins P-1, P-2,and P-3 Design In Series
a) I have attached a SEDCAD report describing the design method.Three ponds in series are most
efficient for most land disturbances. It prevents overloading and minimizes plugging of orifices.The
series allows an initial basin to collect sandy soil for re-sale,the second pond serves to equalize the
water flow and reduce sandy silt loading,the third pond provides an extended detention time for clayey
silts.These ponds will also serve as tailings sedimentation clarifiers for soil screening operations.
b) Sheet C-501 show spillway details; as noted P-1 to P-3 orifices diameters decrease to improve water
quality. Barrell and Riser orifice maintenance are listed in the specifications (C-501).
9. Pond Design Flows
a) Flow rates are now shown correctly.
10. Storm Design
a) The basins are designed to pass the 25-yr/24-hr rainfall event. The 10-yr/24-hr storm was
modeled to meet state BMP criteria. The SEDCAD report predicts 85% removal of TSS with a
discharge concentration of 6 ml/I for the 10-yr/24-hr storm event.
11. Erosion Control Details
a) The basins have been re-labeled with elevation data, inverts, Spillway data, Top of Dam spot
elevations, inlet protection, and plunge pools. Now re-submitted for your review with intent to
meet all the criteria.
12. Silt Fences
a) Silt fences have been added down gradient of the pond area with rock check dams for flow
discharge.
13. Topographic Contours
a) Sheet C-205 now shows the off-site sub-watersheds with topographic contours.
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14. Wildlife Study
a) A new study for the project site has been completed by Pilot Environmental. A copy of the
report is now included with this submittal for reference.
If you have any questions concerning the submittal, please contact me at 859-537-5530 or 704-655-7290 or
jmeade(a--)meadeaunnell.com.
Sincerely,
M=OD= GUNN-LL
Engineering,
P.C.
r L. Bade P.E.
rincipaI
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