SW3220803_email_20230811 (4)

Peck, Kaitlin
From:Farkas, Jim J
Sent:Friday, August 11, 2023 3:01 PM
To:Kiker, Matthew
Cc:Holland, Brianna; Craig Grimmer; Wright, Nathan
Subject:RE: \[External\] RE: SW3220803 Cresswind Phase 4
Attachments:Capture4.PNG
And what determines the temporary pool surface elevation of a wet pond (please refer to Figure 4 in Part C-3 of the
Manual)? Nowhere in the Manual or rules does it state that the temporary pool/design volume is equal to the volume
from the 1” storm event.

15A NCAC 02H .1017(5) “For high density projects designed to achieve runoff treatment, the required storm depth shall
be one inch…”
15A NCAC 02H .1002(43) “‘Runoff treatment’ means that the volume of stormwater runoff generated from all of the
built-upon area of a project at build-out during a storm of the required storm depth is treated in one or more primary
SCMs…”
15A NCAC 02H .1050(1) “SIZING. The design volume of SCMs shall take into account the runoff at build-out from all
surfaces draining to the system… The combined design volume of all SCMs on the project shall be sufficient to handle
the required storm depth.” (Note the use of “take into account” and “sufficient”, a larger design volume than what is
required based on the 1” storm would be acceptable. The rule would be worded differently if the design volume of the
SCM were just based on the required storm depth).

This may have changed somewhat since Phases 2 & 3 were originally submitted, note that the current version of the
Supplement-EZ Form differentiates between the minimum required treatment volume and the design volume of an SCM
whereas the one used for that project does not.

I took a look at the revised PDF you sent in the other email and it looks correct (I will need to review the specifics, but
from a precursory look, the issue appears to have been addressed).

Sorry for the confusion,

Jim Farkas
State Stormwater Engineer
North Carolina Department of Environmental Quality
Office: [phone]
[e-mail]

1

From: Kiker, Matthew <[e-mail]>
Sent: Friday, August 11, 2023 1:56 PM
To: Farkas, Jim J <[e-mail]>
Cc: Holland, Brianna <[e-mail]>; Craig Grimmer <[e-mail]>; Wright, Nathan
<[e-mail]>
Subject: RE: \[External\] RE: SW3220803 Cresswind Phase 4

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Jim sorry for the back and forth on this but I feel strongly that you might be missing something here.

Per the manual the temporary pool is the design volume (1” storm event) to be retained for a two to five day period. In
this case we are using a 4”orifice to control the release of the 1” storm event design volume (95,975 cf) to release at
that rate.

What am I missing here that we haven’t already done on previous phases?

MATTHEW KIKER, PE | Principal/Project Manager
THOMAS & HUTTON
p 980-201-5519 m 980-521-5999
e [e-mail]
a 1020 Euclid Avenue | Charlotte, NC 28203
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PRIVILEGED AND CONFIDENTIAL: This electronic message and any attachments are confidential property of Thomas &
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From: Farkas, Jim J <[e-mail]>
Sent: Friday, August 11, 2023 1:30 PM
To: Kiker, Matthew <[e-mail]>
Cc: Holland, Brianna <[e-mail]>; Craig Grimmer <[e-mail]>; Wright, Nathan
<[e-mail]>
Subject: RE: \[External\] RE: SW3220803 Cresswind Phase 4

I’m aware of that.

The invert of the 4” orifice (@574.50’) sets the permanent pool surface elevation (the orifice is not considered to be a
bypass device since all of the treated runoff in the pond goes through that orifice). The invert of the 5’ wide bypass weir
(@576.4’) sets the temporary pool surface elevation. The volume that can be stored between the permanent pool
surface and the temporary pool surface is the design volume of the SCM. So long as this design volume is larger than the
2

minimum required treatment volume of the SCM, the SCM is adequately sized. The design volume of the SCM should be
used for calculations/MDCs (not the minimum required treatment volume).

Jim Farkas
State Stormwater Engineer
North Carolina Department of Environmental Quality
Office: [phone]
[e-mail]

From: Kiker, Matthew <[e-mail]>
Sent: Friday, August 11, 2023 12:59 PM
To: Farkas, Jim J <[e-mail]>
Cc: Holland, Brianna <[e-mail]>; Craig Grimmer <[e-mail]>; Wright, Nathan
<[e-mail]>
Subject: RE: \[External\] RE: SW3220803 Cresswind Phase 4

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Jim – the 4” orifice controls the water quality runoff discharge flow. It has to be set at NWL to control the water quality
runoff otherwise that storm event would never leave the pond. This is exactly how we have designed all the previous
phases, so I am hoping you are not missing this on the detail.

The first weir is set at 577.40 so the storage in the pond is higher than the calculated 95,975 cf required to be treated.

3

MATTHEW KIKER, PE | Principal/Project Manager
THOMAS & HUTTON
p 980-201-5519 m 980-521-5999
e [e-mail]
a 1020 Euclid Avenue | Charlotte, NC 28203
vCard | Website | LinkedIn | Facebook | Twitter | Instagram

PRIVILEGED AND CONFIDENTIAL: This electronic message and any attachments are confidential property of Thomas &
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From: Farkas, Jim J <[e-mail]>
Sent: Friday, August 11, 2023 12:53 PM
To: Kiker, Matthew <[e-mail]>
Cc: Holland, Brianna <[e-mail]>; Craig Grimmer <[e-mail]>; Wright, Nathan
4

<[e-mail]>
Subject: RE: \[External\] RE: SW3220803 Cresswind Phase 4

The design volume (temporary pool) is based on the volume of water that can be stored between the permanent pool
surface elevation and the invert of the lowest bypass orifice/weir (in this case, the weir @ 576.40’).

The minimum required treatment volume is based on the drainage area to the SCM (95,975 cf).

In order for the pond to be adequately sized, the SCM must be designed so that the design volume is greater than or
equal to the minimum required treatment volume.

Example: Based on the drainage area to a wet pond, the minimum required treatment volume of the wet pond is 30,000
cf (calculated usung the Simple Method or Discrete NRCS Curve Number Method). Based on the configuration of the wet
pond and outlet structure, the wet pond can store 35,000 cf of runoff between the permanent pool and invert of the
lowest bypass device. This SCM is adequately sized since the design volume of the SCM (35,000 cf) is at least as large or
larger than the minimum required treatment volume of the SCM (30,000 cf), however, the sizing/design requirements of
the SCM need to be based on the actual provided design volume (35,000 cf). It is recommended to try to keep the design
volume somewhat close to the minimum required treatment volume so as to not unnecessarily oversize the SCM.

Jim Farkas
State Stormwater Engineer
North Carolina Department of Environmental Quality
Office: [phone]
[e-mail]

From: Kiker, Matthew <[e-mail]>
Sent: Friday, August 11, 2023 11:04 AM
To: Farkas, Jim J <[e-mail]>
Cc: Holland, Brianna <[e-mail]>; Craig Grimmer <[e-mail]>; Wright, Nathan
<[e-mail]>
Subject: FW: \[External\] RE: SW3220803 Cresswind Phase 4
Importance: High

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Good morning Jim,

I just wanted to follow up on this to see if you had a chance to review my response in RED below?

I believe that should all we need confirmation on before we resubmit hardcopies for approval.

5

Thanks!

MATTHEW KIKER, PE | Principal/Project Manager
THOMAS & HUTTON
p 980-201-5519 m 980-521-5999
e [e-mail]
a 1020 Euclid Avenue | Charlotte, NC 28203
vCard | Website | LinkedIn | Facebook | Twitter | Instagram

PRIVILEGED AND CONFIDENTIAL: This electronic message and any attachments are confidential property of Thomas &
Hutton. The information is intended only for the use of the person to whom it is addressed. Any other interception, copying,
accessing, or disclosure of this message is prohibited. If you have received this message in error, please immediately notify
Thomas & Hutton and purge the message received. Do not forward this message without permission.

From: Kiker, Matthew
Sent: Wednesday, August 9, 2023 1:02 PM
To: Farkas, Jim J <[e-mail]>
Cc: Holland, Brianna <[e-mail]>; Wright, Nathan <[e-mail]>; Craig Grimmer
<[e-mail]>
Subject: RE: \[External\] RE: SW3220803 Cresswind Phase 4

Good afternoon Jim,

I just wanted to follow up on this. We want to revise and respond this week but would like some clarification on your
comments.

See attached and below:
 We have revised the Application and EZ Form according to your comments
 The temporary pool elevation is based on the 95,975 CF of required volume calculated above our proposed 4”
orifice (see detail on sheet C3.29) which would stage up to elev. 576.22 by interpolating the elevation of this
volume between the NWL of 574.50 and Top of Pond of 580.00

If this gets you what you need we can submit hardcopies as soon as possible. Please let us know.

Thanks!

MATTHEW KIKER, PE | Principal/Project Manager
THOMAS & HUTTON
p 980-201-5519 m 980-521-5999
e [e-mail]
a 1020 Euclid Avenue | Charlotte, NC 28203
vCard | Website | LinkedIn | Facebook | Twitter | Instagram

PRIVILEGED AND CONFIDENTIAL: This electronic message and any attachments are confidential property of Thomas &
Hutton. The information is intended only for the use of the person to whom it is addressed. Any other interception, copying,
accessing, or disclosure of this message is prohibited. If you have received this message in error, please immediately notify
Thomas & Hutton and purge the message received. Do not forward this message without permission.

From: Elliott, Logan <[e-mail]>
Sent: Tuesday, August 1, 2023 5:40 PM
To: Farkas, Jim J <[e-mail]>; Kiker, Matthew <[e-mail]>
Subject: RE: \[External\] RE: SW3220803 Cresswind Phase 4

Jim,
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Do you have time to talk tomorrow, to confirm we have addressed your comments correctly and answer a couple of
questions we have?

Thanks,

LOGAN ELLIOTT, PE | Designer
THOMAS & HUTTON
p 980-201-5517
e [e-mail]
a 1020 Euclid Avenue | Charlotte, NC 28203
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PRIVILEGED AND CONFIDENTIAL: This electronic message and any attachments are confidential property of Thomas &
Hutton. The information is intended only for the use of the person to whom it is addressed. Any other interception, copying,
accessing, or disclosure of this message is prohibited. If you have received this message in error, please immediately notify
Thomas & Hutton and purge the message received. Do not forward this message without permission.

From: Farkas, Jim J <[e-mail]>
Sent: Monday, July 24, 2023 4:06 PM
To: Kiker, Matthew <[e-mail]>
Cc: [e-mail]; Elliott, Logan <[e-mail]>; Craig Grimmer <[e-mail]>
Subject: RE: \[External\] RE: SW3220803 Cresswind Phase 4

Matt,

I was looking over the additional information you provided on May 8, 2023. Everything looks good except for a few small
issues:

Please correct the following:
- Application:
o Section IV, 10 – Please revise as needed so that the information is consistent with the Supplement-EZ
Form:
Item Provided Value Value per Supplement-EZ Form
Proposed Impervious Area (sf) 1,840,410 1,177,540
% Impervious Area 64% 55%*
On-site Parking (sf) 147,000 183,750
Total (sf) 1,140,790 1,177,540
*NOTE: 1,177,540 sf / 1,840,410 sf = 64% so the %BUA as shown in the Application is correct (The
Supplement-EZ Form needs to be revised, see below).

- Supplement-EZ Form:
o Drainage Areas Page:
 Prior Comment – Pond 5 Column, Line 16 – Please revise this item (see earlier comment). Per
the previously provided email, the “correct” drainage area size for this SCM is 1,840,410 sf and a
total of 1,177,540 sf of BUA is located within the drainage area to the SCM (1,177,540 sf /
1,840,410 sf = 64%). NOTE: The provided value for the entire site column, 55%, is OK and does
not need to be changed.
o Wet Pond Page:
 Prior Comment – Line 25 – The temporary pool elevation is typically set by the invert of the
lowest bypass elevation of the SCM (the weir @ 576.40’). Please revise. The provided value,
576.22’ does not correspond to the bypass weir invert at elevation 576.40’. Please revise.
 Prior Comment – Line 35 – The design volume of the SCM is the volume that can be stored
above the permanent pool surface elevation and below the temporary pool surface. The
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provided value, 95,975 cf, does not correspond to the volume of water that can be stored
between the permanent pool surface elevation and the invert of the bypass weir (Per the
provided stage storage table, the storage volume provided above the permanent pool and
below 576.40’ is approximately 98,000 cf). Please revise.

Please provide the following:
- 1x hard copy & 1x electronic copy of the revised pages of the Application.
- 1x hard copy & 1x electronic copy of the revised pages of the Supplement-EZ Form.
- 2x hard copies & 1x electronic copy of the revised SCM detail sheet showing the dewatering orifice for the wet
pond.
- 1x hard copy (2x hard copies for plan sheets) & 1x electronic copy of anything else needed to address these
comments.

Hard copies should be mailed to me at the following address:
For FedEx/UPS:
Jim Farkas
512 N. Salisbury Street, Office 640M
Raleigh, NC 27604

For USPS:
Jim Farkas
1636 Mail Service Center
Raleigh, NC 27699-1636

Hand Delivery:
Please reach out to me prior to hand delivering a submission to make sure that I (or someone else in my group)
will be able to receive the submission. Do not leave the package in the foyer with the security guard.

NOTE: Hard copies should not be sent to a Regional Office. Doing so will delay the review process and the
submission package may be lost while being sent from the Regional Office to me in the Central Office.

Electronic copies should be uploaded at the following location:
https://edocs.deq.nc.gov/Forms/SW-Supplemental-Upload

Since these are really minor things, once I get the hard copies, anything else that may have changed from addressing
these issues, and the documents are uploaded to Laserfiche (Provided everything is still in order), we can issue the
permit without doing another formal review.

Let me know if you have any questions.

Jim Farkas
State Stormwater Engineer
North Carolina Department of Environmental Quality
Office: [phone]
[e-mail]
8

From: Kiker, Matthew <[e-mail]>
Sent: Wednesday, July 19, 2023 4:52 PM
To: Farkas, Jim J <[e-mail]>
Cc: [e-mail]; Elliott, Logan <[e-mail]>; Craig Grimmer <[e-mail]>
Subject: \[External\] RE: SW3220803 Cresswind Phase 4

CAUTION: External email. Do not click links or open attachments unless verified. Report suspicious emails with the Report Message
button located on your Outlook menu bar on the Home tab.

Afternoon Jim,

The EZ Form is correct.

Thanks,

MATTHEW KIKER, PE | Principal/Project Manager
THOMAS & HUTTON
p 980-201-5519 m 980-521-5999
e [e-mail]
a 1020 Euclid Avenue | Charlotte, NC 28203
vCard | Website | LinkedIn | Facebook | Twitter | Instagram

PRIVILEGED AND CONFIDENTIAL: This electronic message and any attachments are confidential property of Thomas &
Hutton. The information is intended only for the use of the person to whom it is addressed. Any other interception, copying,
accessing, or disclosure of this message is prohibited. If you have received this message in error, please immediately notify
Thomas & Hutton and purge the message received. Do not forward this message without permission.

From: Farkas, Jim J <[e-mail]>
Sent: Wednesday, July 19, 2023 8:39 AM
To: Kiker, Matthew <[e-mail]>
Cc: [e-mail]
Subject: RE: SW3220803 Cresswind Phase 4

Matt,

Can you please clarify which values are correct as there is a discrepancy between the information provided in the
Application and Supplement-EZ Form for the DA to the SCM?

Item Application (Sect. IV, 10) Supplement-EZ Form (DA Page)
Parking 147,000 sf 183,750 sf
Total BUA 1,140,790 sf 1,177,540 sf
9

-Jim

From: Farkas, Jim J
Sent: Monday, April 10, 2023 2:38 PM
To: Kiker, Matthew <[e-mail]>
Cc: [e-mail]
Subject: RE: SW3220803 Cresswind Phase 4

Matt,

I was looking over the additional information you provided on January 10, 2023. Everything looks good except for a few
small issues:

Please correct the following:
- Prior Comment – Please upload the submitted plan sheets individually under the appropriate file types, not as a
single file.
o What was provided: A PDF containing 81 plan sheets uploaded as “Grading/Drainage Plan”
o What is expected: Multiple smaller PDFs containing relevant subsets of the 81 page planset uploaded
under the appropriate file types. This project will probably use file types such as cover sheet, existing
conditions/survey, proposed conditions/site plan, existing drainage areas, proposed drainage areas,
SCM details, miscellaneous details, etc… and each file should only have a couple of plan sheets included
in it. Laserfiche (the software that we use for the electronic file uploads) renames & categorizes the
uploaded files based on the file type selected and has issues with large files so that is why the planset
needs to be broken down in this manner.
- Application:
o Section IV, 8 – The provided percent BUA for the entire site is shown as 54% whereas this value is shown
as 55% in the Supplement-EZ Form. Based on the provided information (project area of 49.19 ac, New
BUA of 27.03 ac, and no existing BUA = 55%), the Supplement-EZ Form appears to be correct. Please
revise as needed.
o Section IV, 10, % Impervious Area – The percent impervious area for the drainage area to the SCM as
shown (55%) does not appear to correspond to the information provided for the SCM drainage area
(drainage area of 42.25 ac, New BUA of 27.03 ac, and no existing BUA = 64%)/the information shown in
the calculations (64%). Please revise as needed.
- Supplement-EZ Form:
o Cover Page:
 Prior Comment – Line 2 – Please use the project area (found in Section IV, 7 of the Application
(which does not include the on-site surface water area)) instead of the total project area (per
Section IV, 4 of the Application (which does include the on-site surface water area))
o Drainage Areas Page:
 Line 10, Roof – Line 10 is a breakdown of all of the BUA that is not allocated to an individual lot
(i.e., located in the common areas). Roof area allocated to the individual lots should be shown
on Line 6 (as is done on the form), but not shown on Line 10. The Line 10 Roof BUA type would
be used for common roof areas, such as for an amenity center or other common area building.
The items of Line 10 should add up to Line 7, and, for this project, the sum of Lines 6 & 7 should
equal Line 5. Please revise as needed.
 Pond 5 Column, Line 16 – Please revise this item (see earlier comment).
o Wet Pond Page:
 Prior Comment – Line 9 – The provided detail does not appear to indicate a drawdown orifice
that could be used to dewater the entire pond. The response to this comment indicates a DIP &
10

sluice gate have been added to the detail, but these items do not appear to have been provided
on the detail on plan sheet C3.29 (If I missed it, please let me know).
 Line 25 – The temporary pool elevation is typically set by the invert of the lowest bypass
elevation of the SCM (the weir @ 576.40’). Please revise.
 Line 34 – The cleanout depth of the forebay is the distance from the permanent pool surface
elevation (574.5’) to the top of the sediment storage zone in the forebay (570.0’) expressed in
inches.
 Line 35 – The design volume of the SCM is the volume that can be stored above the permanent
pool surface elevation and below the temporary pool surface. NOTE: More recent versions of
this form make a distinction between the minimum required treatment volume and the
provided design volume of an SCM (the minimum required treatment volume is determined
from the drainage area to the SCM (provided for this item), typically using the Simple Method,
whereas the design volume is the treatment volume actually provided in the SCM). Please
revise. Per the provided stage storage table, the storage volume provided above the permanent
pool and below 576.40’ is approximately 98,000 cf.

Please provide the following:
- 1x electronic copy of the planset broken down by appropriate file type.
- 1x hard copy & 1x electronic copy of the revised pages of the Application.
- 1x hard copy & 1x electronic copy of the revised pages of the Supplement-EZ Form.
- 2x hard copies & 1x electronic copy of the revised SCM detail sheet showing the dewatering orifice for the wet
pond.
- 1x hard copy (2x hard copies for plan sheets) & 1x electronic copy of anything else needed to address these
comments.

Hard copies should be mailed to me at the following address:
For FedEx/UPS:
Jim Farkas
512 N. Salisbury Street, Office 640M
Raleigh, NC 27604

For USPS:
Jim Farkas
1612 Mail Service Center
Raleigh, NC 27699-1612

Hand Delivery:
Please reach out to me prior to hand delivering a submission to make sure that I (or someone else in my group)
will be able to receive the submission. Do not leave the package in the foyer with the security guard.

NOTE: Hard copies should not be sent to a Regional Office. Doing so will delay the review process and the
submission package may be lost while being sent from the Regional Office to me in the Central Office.

Electronic copies should be uploaded at the following location:
https://edocs.deq.nc.gov/Forms/SW-Supplemental-Upload

Since these are really minor things, once I get the hard copies, anything else that may have changed from addressing
these issues, and the documents are uploaded to Laserfiche (Provided everything is still in order), we can issue the
permit without doing another formal review.

Let me know if you have any questions.

11

Jim Farkas
State Stormwater Engineer
North Carolina Department of Environmental Quality
Office: [phone]
[e-mail]

From: Farkas, Jim J
Sent: Thursday, November 10, 2022 2:10 PM
To: [e-mail]; Kiker, Matthew <[e-mail]>
Cc: Khan, Zahid <[e-mail]>
Subject: RE: SW3220803 Cresswind Phase 4

Good Afternoon,
The Division of Energy, Mineral and Land Resources (DEMLR), received additional information for a Stormwater
th
Management Permit Application for the subject project on August 15, 2022. A review of that information has
determined that the application is not complete. Attached is a letter describing the items that need to be submitted. If
you have any questions, please feel free to contact me. My contact information is listed below.
Thank you,

Jim Farkas
State Stormwater Engineer
North Carolina Department of Environmental Quality
Office: [phone]
[e-mail]

From: Tran, Kieu M <[e-mail]>
Sent: Tuesday, August 16, 2022 12:00 PM
To: [e-mail]; Kiker, Matthew <[e-mail]>
12

Cc: Farkas, Jim J <[e-mail]>; Khan, Zahid <[e-mail]>
Subject: SW3220803 Cresswind Phase 4

Good afternoon,

We received your post-construction stormwater permit application for the above mentioned project on 8/15/2022.
Reviews under the standard permitting process generally take 75 calendar days, but can take up to 90 calendar days per
statute (our other reviewer, Corey Anen, no longer works for the State, so this review may exceed 75 days). Please
upload all documents that you mailed into our office through the link provided below. Be sure to choose the Central
Office as the Primary Contact office.

https://edocs.deq.nc.gov/Forms/SW-Supplemental-Upload

IMPORTANT NOTE: Please ensure that each file is uploaded under its appropriate file type. Additional file types can be
entered into the electronic form by clicking on the “Add Another Post-Construction File Upload” link directly below the
“State Stormwater Information Uploads” section of the form. Please do not upload entire plan sets through this form,
but rather upload the relevant individual sheets under the appropriate file type. Selecting the correct file type ensures
that the files are properly named in the electronic repository and it helps expedite the review process.

Please type in permit #: SW3220803

If you have any questions, please contact Jim Farkas [e-mail] 919-707-3646.

Thank you,

Mrs. Kieu Tran
Stormwater Program Administrative Assistant
Office: (919) 707- 3640
[e-mail]

North Carolina Department of Environmental Quality
Division of Energy, Mineral, and Land Resources Stormwater Program

512 N. Salisbury Street, Raleigh, NC 27604 (location)
1612 Mail Service Center, Raleigh, NC 27699-1612 (mailing)
Website: http://deq.nc.gov/about/divisions/energy-mineral-land-resources/stormwater

Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed
to third parties

Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties by an authorized
state official.
13