SW3181101_AddInfo_20190118

From:
Edwin Suddreth
To:
Anen, Steven C
Cc:
Weston Boles
Subject:
RE: [External] RE: Stormwater Permit Electronic Submittal
Date:
Monday, January 21, 2019 1:13:22 PM
7717157i%xternal email. Do not open attachments unless you verified. Sen
attachment to report.spam(@nc.�
Corey,
I hope you had a good weekend and thanks for providing the review and comments. Below in green
is my response to the comments:
1) Wet pond MDC 3 requires an additional 6" of storage to be added to the forebay and the
main pool for sediment storage. The 6" should be added after the wet pond has been
designed according to the other MDC (essentially this 6" should be left out of any other
calculations for average depth, forebay percentage, etc.)
a. Forebay has been lowered to elevation 969.00 and main pond to 967.00 to provide
a 1' of sediment storage. The grading, detail and forms have been revised to reflect
this change.
2) The calculations for the orifice size are incorrect. Using a 2" orifice will result in a drain time
less than 2 days.
a. Calculation used to compute orifice has been revised to use the one outlined in
NCDEQ BMP manual Q= Cd*A*(2*g*Ho)^0.5. Drawdown time has also been
adjusted to 2.5 days. These two revisions calculate an orifice size of 1.6". The
calculations, detail and forms have been revised to reflect this change.
I have uploaded the revised sheets and calculations and will be sending out two sets of hard copies
as well. Do you have a time frame as to when you will review the submittal so I can provide an
estimate to the developer?
Please let me know if you have any questions and thanks for your help!
Thanks,
Edwin Suddreth, PE
Senior Project Engineer
WK Dickson & Co., Inc.
From: Anen, Steven C <corey.anen(@ncdenr.gov>
Sent: Friday, January 18, 2019 11:44 AM
To: Edwin Suddreth <esuddreth(@wkdickson.com>
Cc: Weston Boles <wboles(@wkdickson.com>
Subject: RE: [External] RE: Stormwater Permit Electronic Submittal

Hi Edwin,
Sorry for the delay in getting back to you. I reviewed the plans and I have two comments, which are
below:
1) Wet pond MDC 3 requires an additional 6" of storage to be added to the forebay and the
main pool for sediment storage. The 6" should be added after the wet pond has been
designed according to the other MDC (essentially this 6" should be left out of any other
calculations for average depth, forebay percentage, etc.)
2) The calculations for the orifice size are incorrect. Using a 2" orifice will result in a drain time
less than 2 days.
Let me know if you have questions. I'll need two hardcopies of any revised plan sheets and they
need to be uploaded electronically at:
https://edocs.deq.nc.gov/Forms/SW_Proiect_ Submittal
Thanks,
Corey Anen
Environmental Engineer
North Carolina Department of Environmental Quality
Division of Energy, Mineral & Land Resources Stormwater Program
512 N. Salisbury Street
1612 Mail Service Center
Raleigh, NC 27699-1612
919-707-3649
Corey.Anen(@ncdenr.gov
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Edwin Suddreth[mailto:esuddreth(@wkdickson.com]
Sent: Wednesday, January 16, 2019 7:42 AM
To: Anen, Steven C <corey.anen(@ncdenr.gov>
Cc: Weston Boles <wboles6Dwkdickson.com>
Subject: [External] RE: Stormwater Permit Electronic Submittal
External email. Do not click links or open attachments unless you verified. Send all suspicious email a
lic hment to reaort.spamPnc.gov t
Corey,
I'm sorry to keep bugging you on this project, but the developer is asking for an update on the
review/approval.

Have you had a chance to review the submittal yet?
Thanks,
Edwin Suddreth, PE
Senior Project Engineer
WK Dickson & Co., Inc.