18087 03-29-21 Resp Ltr

NORRIS & TUNSTALL
CONSULTMG ENGIlYF.F.RS P.C.—
2602 Iron Gate Dr.,Suite 102 1429 Ash-Little River Road
Wilmington,NC 28412 Ash,NC 28420
[phone] [phone]
[phone] Fax [phone] Fax
John S.Tunstall,P.E. J.Phillip Norris,P.E.
T.Jason Clark,P.E. Joseph K.Bland,P.E.
Thomas J.Scheetz,E.I.
March 29, 2021
Adam Parr
Assistant State Mining Engineer
NC DEQ-Land Quality Section—5th Floor
512 N. Salisbury Street
Raleigh,NC 27604
Re: Mining Permit Application Comment Response (10-A02 -ADI - 20200329)
Benton Tract Sand Mine
N&T Project No. 18087
Dear Mr. Parr,
We have reviewed your comments dated March 29,2021 and respond as follows:
1. The design calculations are attached. See revised sheet C3 for the sediment pond dimensions.
2. An energy dissipater has been called out on sheet C2.
3. Sheet C3 has been revised to include the sediment pond details. Sheet C2 shows the outlet pipe
material as a 15"corrugated plastic (CPP).
Please review this information for approval and contact us with any questions or comments you may
have. Thank you for your assistance on this project.
Sincerely,
NORRIS &TUNSTALL
CONSULTING ENGINEERS,P.C.
Thomas
TJS/ttw
18087 03-29-21 s mining app.resp ltr
Enclosures
cc: Brandon Hardee
NCBELS License C-3641