20160671 Ver 1_More Info Received_20160805 (30)

Strickland, Bev
From: Robinson, Jason
Sent: Friday, August 05, 2016 5:20 PM
To: 'Finch, Brandon'; Smith, Cherri L
Cc: Buchholz, George; 'Myers, Sharon A'; 'Hoyt, Sally C'; Burdette, Jennifer a; Smith, Cherri
L
Subject: RE: Finley Fields - Buffer & Level Spreader Requirements
HI Brandon,
Thanks for calling and drafting this email.
Based on our conversation, the description you provide below, and the nutrient calculations. For this unique situation
that utilizes an underdrain system, I believe that routing the outlets to existing ditches with dissipaters designed for full
flow from the outlets meets the intent of the buffer diffuse flow requirements.
Please bear in mind that buffer impacts will still need to be addressed, although I think you said that was already
covered in your 401 application.
Please let me know if you have any questions.
-Jason
------------
Jason T. Robinson, P.E.
Raleigh Regional Office
Water Quality Regional Operations
Division of Water Resources, DEQ
919-791-4200
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to
third parties.
From: Finch, Brandon [mailto:[e-mail]]
Sent: Friday, August 05, 2016 7:06 AM
To: Robinson, Jason <[e-mail]>; Smith, Cherri L <[e-mail]>
Cc: Buchholz, George <[e-mail]>; 'Myers, Sharon A' <[e-mail]>; 'Hoyt, Sally C'
<[e-mail]>; Burdette, Jennifer a <[e-mail]>
Subject: RE: Finley Fields - Buffer & Level Spreader Requirements
Good morning Jason,
I apologize for the delay in sending this to you.
As discussed, please find attached preliminary nitrogen export calculations for the site. As you will see in the summary,
our post -development loading is less than the 2.2 and 0.82 targets for the UNH arm of Jordan Lake.

With re: to the underdrain outlets, we will be aiming them towards the existing ditches on this site and will install
velocity dissipaters at their ends to help address any erosion in these areas. To size them (and due to the difficulty in
computing the flow rate from the underdrains), we will size the dissipaters assuming a full flow condition.
Hopefully this email helps to address the level spreader/diffuse flow requirement issue for this site. If you should have
any questions or need any additional information, please do not hesitate to give me a call.
Best regards,
Brandon R. Finch, PE I Director of Institutional
2905 Meridian Parkway I Durham, NC 27713
Office: 919.361.5000 x 127
Direct: 919.287.0892
Mobile: [phone]
McAdamsCo.com
9 MCADAMS
Designing Tomorrow's Infrastructure & Communities
From: Finch, Brandon
Sent: Tuesday, August 02, 2016 2:26 PM
To: 'Robinson, Jason' <[e-mail]>; Smith, Cherri L <[e-mail]>
Cc: Buchholz, George <[e-mail]>; Myers, Sharon A <[e-mail]>; 'Hoyt, Sally C'
<[e-mail]>; Burdette, Jennifer a <[e-mail]>
Subject: RE: Finley Fields - Buffer & Level Spreader Requirements
Good afternoon Jason,
I will check on the calculations with my field designer and be in touch.
Re: the outlets — you are correct. However, please note both underdrains discharge into an existing ditch with outlets on
each end into Morgan Creek. For clarity, I created two snippets below that turn off the proposed grading and only show
the proposed field, underdrains, and the existing contours. A couple of items to note:
1. There is an existing footbridge with culverts as well in this ditch (shown in gray). If needed, I also attached the
existing conditions sheet for reference.
2. The snippet of the south side shows a different location for the outlet, but this also goes to a concentrated
location. My preference would be to outlet into the ditch shown on the PDF and not the location we show
below, but that is up for discussion.
I am hoping that since we are discharging underdrains into an existing ditch that already has natural concentrated points
through the buffer to Morgan Creek that we would not need to provide a level spreader, but I am deferring to you.
Brandon R. Finch, PE I Director of Institutional
2905 Meridian Parkway I Durham, NC 27713
Office: 919.361.5000 x 127
Direct: 919.287.0892
Mobile: [phone]
McAdamsCo.com

9 MCADAMS
Designing Tomorrow's Infrastructure & Communities

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From: Robinson, Jason[mailto:[e-mail]]
Sent: Tuesday, August 02, 2016 1:43 PM
To: Finch, Brandon <[e-mail]>; Smith, Cherri L <[e-mail]>
Cc: Buchholz, George <[e-mail]>; Myers, Sharon A <[e-mail]>; 'Hoyt, Sally C'
<[e-mail]>; Burdette, Jennifer a <[e-mail]>
Subject: RE: Finley Fields - Buffer & Level Spreader Requirements
Brandon,
Have you done any calculations to see what kind of flow would be discharging for different storms?
Also, upon further investigation, I see that the current plan shows both discharges in Zone 2 discharging into the edge of
Zone 1.
------------
Jason T. Robinson, P.E.
Raleigh Regional Office
Water Quality Regional Operations

Division of Water Resources, DEQ
919-791-4200
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to
third parties.
From: Finch, Brandon [mailto:[e-mail]]
Sent: Monday, August 01, 2016 3:05 PM
To: Robinson, Jason <[e-mail]>; Smith, Cherri L <[e-mail]>
Cc: Buchholz, George <[e-mail]>; Myers, Sharon A <[e-mail]>; 'Hoyt, Sally C'
<[e-mail]>; Burdette, Jennifer a <[e-mail]>
Subject: RE: Finley Fields - Buffer & Level Spreader Requirements
Hi Jason,
Thank you for following up!
You are correct with the two points of discharge. Note this is preliminary at this point and we can try to shift where we
are proposing Zone 1 impacts if needed
The field will be Bermuda grass and I am certain they will maintain it. I am not sure of the fertilization program.
Best,
Brandon R. Finch, PE I Director of Institutional
2905 Meridian Parkway I Durham, NC 27713
Office: 919.361.5000 x 127
Direct: 919.287.0892
Mobile: [phone]
McAdamsCo.com
9 MCADAMS
Designing Tomorrow's Infrastructure & Communities
From: Robinson, Jason [mailto:[e-mail]]
Sent: Monday, August 01, 2016 2:01 PM
To: Finch, Brandon <[e-mail]>; Smith, Cherri L <[e-mail]>
Cc: Buchholz, George <[e-mail]>; Myers, Sharon A <[e-mail]>; 'Hoyt, Sally C'
<[e-mail]>; Burdette, Jennifer a <[e-mail]>
Subject: RE: Finley Fields - Buffer & Level Spreader Requirements
Hi Brandon,
Hope you're doing well.
I haven't experienced a project like this before that will just be collecting the water that soaks through the ground, and
not technically collecting surface water.
From what I can see from a quick look at the plans, there will be two points of discharge, one on the SE corner of the
eastern field, and on the NE corner of the eastern field. The SE discharge appears to be in Zone 2 of the buffer and

discharging into Zone 1, and the NE discharge appears to be outside of the buffer and discharging into Zone 2. Is this
accurate?
One concern I have is that I assume this field would be heavily fertilized.
I'd like to discuss with co-workers and will get back with you.
-Jason
------------
Jason T. Robinson, P.E.
Raleigh Regional Office
Water Quality Regional Operations
Division of Water Resources, DEQ
919-791-4200
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to
third parties.
From: Finch, Brandon [mailto:[e-mail]]
Sent: Monday, August 01, 2016 10:46 AM
To: Smith, Cherri L <[e-mail]>; Robinson, Jason <[e-mail]>
Cc: Buchholz, George <[e-mail]>; Myers, Sharon A <[e-mail]>; 'Hoyt, Sally C'
<[e-mail]>
Subject: Finley Fields - Buffer & Level Spreader Requirements
Good morning Cherri & Jason,
I hope you are both well.
Cherri — thank you for taking my call this morning.
Jason — I just left you a voice mail. Attached are PDFs showing the issue in question — a proposed underdrain system and
the requirement for a level spreader. If you get a minute, please give me a call to discuss when you have a chance.
Best regards,
Brandon R. Finch, PE I Director of Institutional
2905 Meridian Parkway I Durham, NC 27713
Office: 919.361.5000 x 127
Direct: 919.287.0892
Mobile: [phone]
McAdamsCo.com
9
MCADAMS-
Designing Tomorrow's Infrastructure & Communities