20150615 Ver 1_Request for Extension_20160708

Strickland, Bev
From: Mike Roselli <[e-mail]>
Sent: Friday, July 08, 2016 3:22 PM
To: Turlington, Chad
Cc: Larsen, Cory; Andrew Allison; Charlie Yowell
Subject: RE: Rockingham MGP Retail Project - Request for Extension
Attachments: NCR151000BP1-C-6.0 SCM PLAN WET POND.pdf, 2016.07.08 Wetpond Exit
Velocity.pdf, 2016.07.08 Bioretention Exit Velocity.pdf
Chad,
I spoke with Cory this morning. We've updated the pond to make sure that water does not short circuit, by raising the
forebay berm and providing a directional outlet into the main pool, a solution Cory agreed would be sufficient.
Additionally, per Cory's direction, I've reviewed other available calculations which will provide supporting evidence of
the velocity leaving the pond at less than 2 feet per second. See attached additional calculation across the dissipater
pad.
We're eager for approval, so if you could provide an approval letter today, it would be much appreciated!
Thanks for your time, and don't hesitate to call my mobile with questions, comments, or concerns.
Mike Roselli, P.E.
B 11 a
("DOF H L E R
ENGINEERING RIN NC. PLLC
4011 Westchase Boulevard, Suite 290 Raleigh, NC 27607
P:919-578-9000 1 M:919-696-0830 [e-mail]
www.BohlerEngineering.com
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From: Larsen, Cory [mailto:[e-mail]]
Sent: Thursday, July 07, 2016 3:33 PM
To: Andrew Allison <[e-mail]>
Cc: Turlington, Chad <[e-mail]>; Mike Roselli <[e-mail]>
Subject: RE: Rockingham MGP Retail Project - Request for Extension
Andrew/ Mike:
I've reviewed the submittal and it looks good but would like a couple items addressed.
1) The location of the pond's forebay and outlet may result in short-circuiting instead of the recommended 3:1 or
greater flow path. Please revise either the outlet location or include baffles to extend the flow path (to force
inflow back towards retaining wall).

2) When calculating the outlet velocity from the pond (1.34 ft/s), the full area of the 18" RCP was used to
determine exit velocity for the 10 year discharge. Full pipe flow is unlikely and the calculation should be revised
or evaluated from termination of riprap dissipater pad.
Thank you.
Cory Larsen, PE
Stormwater Engineer
401 & Buffer Permitting Branch
NCDEQ — Division of Water Resources
919.807.6379 office
cory.larsena-ncdenr.gov
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Nothing Compares---,-
Email
omp reEmail correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Larsen, Cory
Sent: Wednesday, June 29, 2016 9:21 AM
To: 'Andrew Allison' <[e-mail]>
Cc: Turlington, Chad <[e-mail]>; Allen, Trent <[e-mail]>;
[e-mail]
Subject: RE: Rockingham MGP Retail Project - Request for Extension
Got it. Will review and let you know if we need anything else.
From: Andrew Allison fmailto:aallison(@bohlerene.com
Sent: Tuesday, June 28, 2016 4:36 PM
To: Larsen, Cory <[e-mail]>
Cc: Turlington, Chad <[e-mail]>; Allen, Trent <[e-mail]>;
[e-mail]
Subject: RE: Rockingham MGP Retail Project - Request for Extension
Cory,
I wanted to follow up with you and make sure you received the plans I dropped off this past Friday. Let me know if not.
Thank you,
Andrew Allison, E.I.
Bohler Engineering NC, PLLC
4011 Westchase Boulevard, Suite 290, Raleigh, NC 27607
[phone]

From: Larsen, Cory [mailto:[e-mail]]
Sent: Monday, June 13, 2016 10:26 AM
To: Andrew Allison <[e-mail]>
Cc: Turlington, Chad <[e-mail]>; Allen, Trent <[e-mail]>
Subject: RE: Rockingham MGP Retail Project - Request for Extension
Andrew
No problem on the extension. Please provide us the additional information by June 27, 2016 so that we can complete
our review.
Cory Larsen, PE
Stormwater Engineer
401 & Buffer Permitting Branch
NCDEQ — Division of Water Resources
919.807.6379 office
cory.larsen(c)ncdenr.gov
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
a Nott ng Compares-,,
res
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Andrew Allison [mailto:aallison(@bohlerene.com
Sent: Monday, June 13, 2016 10:20 AM
To: Larsen, Cory <[e-mail]>
Subject: FW: Rockingham MGP Retail Project - Request for Extension
Cory,
See attachments and previous email below.
Thanks,
Andrew Allison, E.I.
Bohler Engineering NC, PLLC
4011 Westchase Boulevard, Suite 290, Raleigh, NC 27607
[phone]
From: Andrew Allison
Sent: Thursday, June 09, 2016 1:15 PM
To:'[e-mail]'<[e-mail]>;'[e-mail]' <[e-mail]>
Cc: '[e-mail]' <[e-mail]>; Turlington, Chad <[e-mail]>; Mike Roselli
([e-mail]) <[e-mail]>; Andrew Moriarty ([e-mail])

<[e-mail]>; [e-mail]
Subject: Rockingham MGP Retail Project - Request for Extension
0
Attached please find our request for an extension on the proposed MGP Rockingham Retail Development Site. I have
also placed a hard copy in the mail addressed to Belinda.
Thank you,
Andrew Allison
B 11 a
(0/ H L E R
Etti GINEERI'NG NC, PLLC
4011 Westchase Boulevard, Suite 290 1 Raleigh, NC 27607
P:919-578-9000 1 [e-mail]
www.BohlerEngineering.com
Confidentiality Note: This e-mail, and any attachment to it, contains confidential information intended only for the use of the designated recipients,
which information may also be privileged. If the reader of this e-mail is not the intended recipient, the document has been received in error and any
use, review, dissemination, distribution, disclosure or copying of this message is strictly prohibited. If you have received this e-mail in error, please
notify the sender via reply e-mail and immediately delete this e-mail from your system.