20230802_ADI_Received

CAROLINA GEOLOGICAL SERVICES, INC
July 26, 2023 RECEIVED
Mr. Adam Parr
NCDEQ, Land Quality Section AW 0 2 Ion
1612 Mail Service Center
Raleigh, NC 27699-1612 LAND QUALITY
MINING PROGRAM
Subject: Firetower Road Sand Mine, Onslow County
Dear Mr. Parr;
I am writing in response to your letter of June 14, 2023 to Mr. Rick Williford, Sunland Sand
and Gravel, in which you requested additional information on their pending application for the
above referenced Mining Permit. I will respond to each item in your letter in the same order for
clarity:
1 & 2: The names of the property owners across from the entrance on Firetower Road, Julie
Willaford and Donald Gene Riggs have been added to the mine map. They have been sent
copies of the official Notice, and Certified Mail receipts for the notification letters are enclosed.
3 & 4: The wetland delineation and crossing was reviewed and approved by Katharine Elks, US
Army Corps of Engineers. Please find attached the final JD map and a copy of the email
correspondence confirming the approval. The existing wetland crossing was approved, and Mr.
Williford is confident that it is more than sufficient for his intended use and does not plan to
make any changes from the existing, approved construction.
5. The exact pump for dewatering has not yet been purchased. However, it is anticipated that
the pump to be used will be similar to a Dobbs floating electric centrifugal pump. The projected
pump will be 7.5 horsepower, up to 3,600 rpm, with a projected 6-inch outlet.
6. As we discussed on the telephone and by email, the design for the "dewatering basin" has
been modified to the NCDOT specification for a dewatering basin that you supplied. There will
not be "another pond" to collect stormwater and groundwater. As we discussed, the stormwater
and groundwater will collect within the mining area, and the sediment will settle out within the
mining area before it is discharged, as per regulations prescribed in the NPDES permit.
Please let me know if you need any additional information.
Sincerely,
)James C. Izzell, Jr.
Carolina Geological Services, Inc.
PO BOX 429, GARNER, NC 27S29 (91 9) 779-001 7

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-----Forwarded Message
Fronw. Elks,Katharine B CIV USARMY CESAW(USA)<[e-mail]>
To:[e-mail]<[e-mail]>
Cc:John Roberts<[e-mail]>
Sent:Tuesday,July 11,2023 at 04:45:29 PM EDT
Subject:SAW 2023-01214 317 Fire Tower Road Richlands-Written Concurrence
On June 14,2023,we received information from you requesting the Wilmington District,Regulatory Division review and
concur with the boundaries of an aquatic resource delineation.
We have reviewed the information provided by you concerning the aquatic resources,and by copy of this e-mail,are
confirming that the aquatic resources delineation has been verified by the Corps to be sufficiently accurate and reliable for
permitting actions and the determination of compensatory mitigation requirements.The boundaries of these aquatic
resources are shown on the attached delineation map,labeled Potential Jurisdictional Wetlands Delineation Onslow
County dated June 7,2023.
Regulatory Guidance Letter(RGL) 16-01
https://usace.contentdm.ocic.org/utils/getfilelcollection/pl6O2lcoll9fid/1256 provides guidance for Jurisdictional
Determinations(JD)and states`The Corps generally does not issue a JD of any type where no JD has been requested".
At this time we are only verifying the delineation. This delineation may be relied upon for use in the permit evaluation
process,including determining compensatory mitigation. This delineation verification is not an Approved Jurisdictional
Determination(AJD)and is not an appealable action under the Regulatory Program Administrative Appeal Process(33
CFR Part 331). However,you may request an AJD,which is an appealable action.
If you wish to receive a Preliminary Jurisdictional Determination(PJD),or an Approved Jurisdictional Determination(AJD)
please respond accordingly,otherwise nothing further is required and we will not provide any additional documentation.
Respectfully,
Katharine Elks
Regulatory Specialist
US Army Corps of Engineers
69 Darlington Ave
Wilmington, NC 28403
910-251-4567(office)
910-473-7034(cell)
E-PCN-Submittal
https://edocs.dea.nc.gov/Forms/Pre-Construction Notification Form
PJDs,Wetland Delineation Concurrence&JD's.
http://saw-reg.usace.army.mi[JDIFINALSAW-JD-REQUEST FORM-20170508.pdf
Submittal You may submit requests via e-mail in PDF format to
WilmingtonNCREGO-usace.army mil

Background Map:Google 2019
Ground Truth Soil Consulting,
PLLC
Potential Jurisdictional
Wetland WA:—2.68acres Wetlands Delineation
Lat 34.8061 Lon :-77.5551
Onslow County
317 Fire Tower Road
Richlands, NC
Parcel No. 019725
Wetland WA:-3.68 ores
(lot:34,8040;Long:-77.5587)
Scale:
0 300 600It
•
Date:
Emstlng l.ulvet/Cro55ing Figure June 7,2023
6 GT Job No.
22-263
SOIL
/ v
Legend 0� ,
M Study Area(-38.7 acres) Potential Jurisdictio 12 .F
(tat:34.8034;Long:-77.5586) _SA This is not a survey. All distances and "4nx
® Potential404 Wetlands:NCWAM Headwater Forest lines are approximate

Dewatering Basin Design *items in red are inputs
Version 2.27.09
The volume of the borrow pit dewatering basin will be based on a 2 hour retention time. Using
the formula V= 8.0203 * Q * t where, V is volume in cubic feet, Q is the pump rate in gallons per
minute (GPM), and t is the retention time in hours. The pump rate is not to exceed 1,000 GPM
60,000 GPH .
STEP 1: Input required variables The volume of the borrow pit dewatering
basin will be based on a 2 hour retention
Pump Rate: 1000 GPM time. The pump rate shall not exceed
Retention Time: 2 hours 1,000 GPM (60,000 GPH). The contractor
may desire a greater retention time for
Required Volume: 16040.E ft' managing turbidity; however, work
associated with this increased volume will
be considered incidental.
STEP 2: Design of the Dewatering Basin
Final Required Volume: 16040.E ft'
Design Depth: 3 not to exceed 3 feet
Proposed Basin Side Slopes: 1.5 :1 side slopes *must be at least 1.5:1 or flatter
OPTIONS
2:1 (L:IM 3:1 (L:IM
Suggested Top Width (ft): 52 43
Suggested Top Length ft : 104 129
Final Design Top Width ft : 56 46
Final Design Top Length ft : 112 138
Final Design Depth ft : 3 3
Verify Storage(W) 16629.00 16641.00
OK OK
The dewatering basin shall be designed in accordance with the Borrow Pit
Dewatering Basin Detail Drawing.
Comments: