20160681 Ver 2_Weir Email Info_20170727

Burdette, Jennifer a
From:
David Syster <[e-mail]>
Sent:
Thursday, July 27, 2017 11:41 AM
To:
Burdette, Jennifer a; Steenhuis, Joanne
Subject:
RE: Blake Farm Weir
Jennifer,
I did speak at length with the engineer who clarified a few of the questions you had. Would it be possible for me
to give you a call to discuss or setup a quick conference call with you and Joanne? This will likely be the best
way to close out the weir discussion.
Thank you,
David A. Syster
President
Southern Environmental Group, Inc.
5315 South College Road Suite E
Wilmington, North Carolina 28412
Phone: [phone]
Fax: [phone]
Mobile: [phone]
-----Original Message -----
From: Burdette, Jennifer a [mailto:[e-mail]]
Sent: Friday, July 21, 2017 12:31 PM
To: David Syster; Steenhuis, Joanne
Subject: RE: Blake Farm Weir
Isn't the culvert under the road and the stormwater pond permanent pool elevation about 9 inches lower than
the existing ditch? Also, wouldn't the flow to the ditch be increased from stormwater runoff conveyed to the
SW pond? Please provide calculations of the anticipated velocities in the ditch after build out compared to the
existing velocities.
If we were to agree to remove the weir then we would add a condition requiring visual monitoring with annual
reports until the DWR determines that the ditch is stable.
Jennifer Burdette
401/Buffer Coordinator
Division of Water Resources - 401 & Buffer Permitting Branch Department of Environmental Quality
919 807 6364 office
[e-mail]
1

1617 Mail Service Center
Raleigh, NC 27699-1617
(Physical Address: 512 N. Salisbury St, Raleigh, NC 27604 - 9th Flr Archdale Bldg - Room 942F)
Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be
disclosed to third parties.
-----Original Message -----
From: David Syster [mailto:[e-mail]]
Sent: Thursday, July 20, 2017 11:50 AM
To: Steenhuis, Joanne <[e-mail]>, Burdette, Jennifer a <[e-mail]>
Subject: RE: Blake Farm Weir
Joanne,
Yes, please see the attached profile drawing. It is difficult to "imagine"
the profile and I'm glad Richard put this together so I could see it myself.
Based on this drawing the ditch is almost level from the start of the proposed portion to the double culverts
believe the culverts should also assist in minimizing any head cutting as upstream of the culverts the ditch
bottom is at or near the same slope as previously.
Please review and let me know your thoughts.
Thank you again,
David A. Syster
President
Southern Environmental Group, Inc.
5315 South College Road Suite E
Wilmington, North Carolina 28412
Phone: [phone]
Fax: [phone]
Mobile: [phone]
-----Original Message -----
From: Steenhuis, Joanne [mailto:[e-mail]]
Sent: Thursday, July 20, 2017 7:58 AM
To: David Syster; Burdette, Jennifer a
Subject: RE: Blake Farm Weir
So do You have elevations of the existing ditch bottoms and the proposed ditch on a drawing to indicate this? If
you do please send it to me, I am not going back through that file looking for it!
-----Original Message -----
From: David Syster [mailto:[e-mail]]
Sent: Wednesday, July 19, 2017 5:35 PM
To: Steenhuis, Joanne <[e-mail]>, Burdette, Jennifer a <[e-mail]>
N

Subject: RE: Blake Farm Weir
Good afternoon Joanne,
Actually I was trying to show that the existing ditch slope is greater than the proposed downstream slope. So I
was theorizing it should slow the water down even in the absence of the weir. I do understand your concern
that drainage may occur from the upstream wetland and/or head cutting due to increased velocities may
eventually cause additional drainage. However, the elevations do not indicate it should be a factor or at least
indicate that any proposed changes would increase the existing probability of head cutting.
Having said all that, it seems more likely to not cause an issue and thus we would rather not go through a
hydrological study or 0&M plan this late in the permit process. We would ask that you consider the elevations
(existing and proposed) and re -consider the necessity of the weir.
Thank you both again for your time and effort on the project!
David A. Syster
President
Southern Environmental Group, Inc.
5315 South College Road Suite E
Wilmington, North Carolina 28412
Phone: [phone]
Fax: [phone]
Mobile: [phone]
-----Original Message -----
From: Steenhuis, Joanne [mailto:[e-mail]]
Sent: Monday, July 17, 2017 10:06 AM
To: David Syster; Burdette, Jennifer a
Subject: RE: Blake Farm Weir
So, there shouldn't be an issue with keeping the weir? Right?
-----Original Message -----
From: David Syster [mailto:[e-mail]]
Sent: Friday, July 14, 2017 11:15 AM
To: Burdette, Jennifer a <[e-mail]>
Cc: Steenhuis, Joanne <[e-mail]>
Subject: Re: Blake Farm Weir
Good morning Jennifer and Joanne,
I've gone through the cross sections from the weir to the pond and it looks like the existing bottom of the ditch
at the weir is at elevation 34.5' and then 33.5' (existing) downstream. The pond normal pool is then at 33' which
would be an increase in fall of 0.5' over that final length from existing ditch to pond. As this proposed ditch
grade is less then the existing ditch it appears unlikely to increase velocity or cause head cutting.

Hopefully my description makes sense. Please let me know your thoughts.
Thank you both and have a great weekend,
David
SEGi
Southern Environmental Group, Inc.
Phone: [phone]
Mobile: [phone]
> On Jul 12, 2017, at 3:58 PM, Burdette, Jennifer a
<[e-mail]> wrote:
> David,
> We were concerned that the connection of ditch P-6 to the pond may
>deepen
or cause down cutting of ditch X-3, which could affect the hydrology of the wetland above the proposed weir.
Perhaps a sheet pile weir could be used and an 0&M plan be executed by the HOA to address the long-term
viability of the weir.
> Jennifer
> Jennifer Burdette
> 401/Buffer Coordinator
> Division of Water Resources - 401 & Buffer Permitting Branch
> Department of Environmental Quality
> 919 807 6364 office
> [e-mail]
> 1617 Mail Service Center
> Raleigh, NC 27699-1617
> (Physical Address: 512 N. Salisbury St, Raleigh, NC 27604 - 9th Flr
> Archdale Bldg - Room 942F)
> Email correspondence to and from this address is subject to the North
> Carolina Public Records Law and may be disclosed to third parties.
> -----Original Message-----
• From: David Syster [mailto:[e-mail]]
> Sent: Wednesday, July 12, 2017 2:41 PM
> To: Steenhuis, Joanne <[e-mail]>
> Cc: Burdette, Jennifer a <[e-mail]>; Greer, Emily
> C SAW <[e-mail]>, Tammy Spivey
> <[e-mail]>, Richard Collier <[e-mail]>
4

> Subject: Re: Blake Farm Weir
>Joanne,
> We understand the States desire to have the weir installed to assist
> in
upstream hydrology. However, the Corps is requesting additional information on the hydrological effects
(hydrologic trespass, long term care etc). These items will require additional time and cost to determine which
would further delay the project.
> As the ditch network has been in place for many years prior to the
> project
we do not anticipate any increase in drainage from the upstream wetland.
> If there is an elevation that a dirt or clay weir/plug can be
> installed
and both agencies will agree no additional information is required that may be an option.
> Please let me know your thoughts.
> Thank you
> David
> SEGi
> Southern Environmental Group, Inc.
> Phone: [phone]
> Mobile: [phone]
>> On Jul 12, 2017, at 2:10 PM, Steenhuis, Joanne
<[e-mail]> wrote:
>> S000, why would you want to do that? The purpose of it was to keep
>> the
water from draining from the wetlands. Give me other options and I may consider it (how about making it a
permanent dam that has an elevation to keep the wetlands from draining?) Otherwise you give me options or
answer Emily's ??
>> -----Original Message-----
» From: David Syster [mailto:[e-mail]]
>> Sent: Wednesday, July 12, 2017 11:28 AM
>> To: Steenhuis, Joanne <[e-mail]>; Emily Greer
>> <[e-mail]>
>> Cc: Tammy Spivey <[e-mail]>
5

>> Subject: Blake Farm Weir
>> Good morning Joanne,
>> We are currently addressing the recent RAI for the Blake Farm IP. One
>> of
the items includes the flashboard riser we had proposed early on as part of the onsite mitigation. At this time
we would like to remove this from the plan but wanted to get you approval as the 401 has been issued.
>> If you could please let me know if you are in agreement with removal
>> or
have any concerns I would appreciate it.
>>Thank you in advance,
>> David
>> SEGi
>> Southern Environmental Group, Inc.
>> Phone: [phone]
>> Mobile: [phone]
6

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