FW_ _External_ RE_ HE-0013_Hyd_PSH_04_pdf

Carpenter, Kristi
From: King, Art C
Sent: Monday, October 23, 2023 11:10 AM
To: Brumagin, Stephen A (Steve) CIV USARMY CESAW (USA)
Cc: Davis, Gregory S; Cail, William G; Conchilla, Ryan
Subject: FW: [External] RE: HE-0013_Hyd_PSH_04.pdf
Attachments: HE-0013_USAC E_Comme nts_20231016_Responses.pdf
Steve,
Please see the response from the Hydro Engineers concerning your questions about the HE-0013, (Leapfrog Project)
drainage plans. Please let us know if you have any comments or additional questions.
Thanks,
Art C. King
Division Environmental Supervisor
NCDOT Highway Division 8
910 773 8015 office
910 690-6581 cell
acking .ncdot.gov
121 Dot Drive
Carthage, NC 28327
From: Davis, Gregory S <[e-mail]>
Sent: Monday, October 23, 2023 10:39 AM
To: King, Art C <[e-mail]>
Subject: FW: [External] RE: HE-0013_Hyd_PSH_04.pdf
Art,
Here are the responses from the Hydro designer with review by Galen for the questions from Steve with the
ACOE. Please forward as needed.
G reg
From: Matt Edwards <[e-mail]>
Sent: Monday, October 23, 2023 10:35 AM
To: Cail, William G <[e-mail]>; Burhans, Terry <[e-mail]>; Buckner, Todd H
<[e-mail]>

Cc: Josh Dalton <[e-mail]>; Davis, Gregory S <[e-mail]>
Subject: RE: [External] RE: HE-0013_Hyd_PSH_04.pdf
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Hi Terry,
I have attached the updated responses to Steve Brumagin's comments. Please let me know if you need anything else.
Thanks,
Matthew Edwards, PE
Sungate Design Group, P.A.
Direct: [phone]
www.sungatedesign.com
From: Cail, William G <[e-mail]>
Sent: Monday, October 23, 2023 9:55 AM
To: Matt Edwards <[e-mail]>
Cc: Josh Dalton <[e-mail]>; Davis, Gregory S <[e-mail]>
Subject: RE: [External] RE: HE-0013_Hyd_PSH_04.pdf
Matt
I am good. Just one extra comment for second bullet.
Alignment of outlet channel provides good transition to receiving stream, with the intent to provide long-term stability.
Thanks
Galen
From: Matt Edwards <[e-mail]>
Sent: Monday, October 23, 2023 9:28 AM
To: Cail, William G <[e-mail]>
Cc: Josh Dalton <[e-mail]>; Davis, Gregory S <[e-mail]>
Subject: RE: [External] RE: HE-0013_Hyd_PSH_04.pdf
CAUTION: External email. Do not click links or open attachments unless verified. Report suspicious emails with the Report Message
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Hi Galen,
Attached is a summary of our call focused on providing additional information to two of Steve Brumagin's comments.
Please let me know if you have any modifications.
Additional information to add to third bullet: "You will need to provide ... do not pose an impoundment threat."
o 2@48" RCP -Vs are the largest pipe size that can fit underneath SR 1301 (Plant Rd) without requiring a
grade raise. The proximity of the proposed 2@48" RCP -Vs and the intersection between SR 1301 (Plant
Rd) and US 15-501 (Aberdeen Rd) also prevents a grade raise at this crossing.

o Additional pipes could be added underneath SR 1301(Plant Rd) but avoiding the increase in proposed
channel width was preferred.
• Additional information to add to fourth bullet: "Please explore options at the outlet of the 48" RCPs under Plant
Road ... energy dissipator... affect wetlands."
o In lieu of an energy dissipator pad, NCDOT Hydraulics is okay with adding 15' to 20' of Class 'I' rip rap in
the channel at the outlet of the proposed 2@48" RCP -Vs. After checking NCDEQ Erosion Control Manual,
Figure 8.06c, I (Matt E.) recommend 20' for length of Cl 'I' rip rap at 2@48" RCP outfall. For multiple
culverts, use 1.25 x Do. 1.25 x (4 ft) x 4 = 20 ft.
o Avoiding impacts to railroad Right -of -Way was requested by the Division.
• Additional information to add to fourth bullet: "In addition, since there is minor realignment... Leap Frog site."
o Due to velocity and proximity of US 15-501, there does not appear to be a way to construct a natural
stream and stay within existing Right -of -Way. There is not enough room between existing Right -of -Way
and US 15-501 for a floodplain bench to be constructed, and to add sinuosity for natural stream design.
The Division is not seeking mitigation credits.
o The special 2' base ditch with Class 'I' rip rap from 15+65 to 17+18 -L- Left is too steep to not have rip
rap in the channel to prevent erosion and scouring. The max shear stress is 2.17 pounds per square foot
and the velocity is 3.61 feet per second.
o Site constraints required steepening the slope at the channel upstream of the 2@83"x57" CMPAs, which
increased velocities. The inlet channel was aligned to provide a better transition to the outlet channel.
Thanks,
Matthew Edwards, PE
Sungate Design Group, P.A.
Direct: [phone]
www.sungatedesign.com
From: Cail, William G <[e-mail]>
Sent: Monday, October 23, 2023 8:09 AM
To: Matt Edwards <[e-mail]>
Cc: Josh Dalton <[e-mail]>
Subject: RE: [External] RE: HE-0013_Hyd_PSH_04.pdf
Ready now if you are.
From: Matt Edwards <[e-mail]>
Sent: Monday, October 23, 2023 7:25 AM
To: Cail, William G <[e-mail]>
Cc: Josh Dalton <[e-mail]>
Subject: RE: [External] RE: HE-0013_Hyd_PSH_04.pdf
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Hi Galen,
I am free anytime today to discuss. What time works for you?
Thanks,

Matt
From: Cail, William G <[e-mail]>
Sent: Monday, October 23, 2023 6:26 AM
To: Matt Edwards <[e-mail]>
Subject: FW: [External] RE: HE-0013_Hyd_PSH_04.pdf
Matt
I am good with your responses but think the last 2 bullets could maybe use a couple extra notes. Let's discuss.
Thanks
Galen
From: Davis, Gregory S <[e-mail]>
Sent: Thursday, October 19, 2023 3:44 PM
To: Cail, William G <[e-mail]>
Subject: FW: [External] RE: HE-0013_Hyd_PSH_04.pdf
Galen,
Could you look over Matt's responses? He may have already reached out to you.
G reg
From: Matt Edwards <[e-mail]>
Sent: Thursday, October 19, 2023 3:39 PM
To: Davis, Gregory S <[e-mail]>; Burhans, Terry <[e-mail]>
Cc: Buckner, Todd H <[e-mail]>; Josh Dalton <[e-mail]>
Subject: RE: [External] RE: HE-0013_Hyd_PSH_04.pdf
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.
Good afternoon Terry,
Please see our responses to Steve Brumagin's comments attached above. Let me know if you need anything else.
Thanks,
Matthew Edwards, PE
Sungate Design Group, P.A.
Direct: [phone]
www.sungatedesign.com
From: Davis, Gregory S <[e-mail]>
Sent: Monday, October 16, 2023 3:11 PM
To: Matt Edwards <[e-mail]>
Cc: Buckner, Todd H <[e-mail]>
Subject: FW: [External] RE: HE-0013_Hyd_PSH_04.pdf
4

Please see below and provide some responses.
From: King, Art C <[e-mail]>
Sent: Monday, October 16, 2023 3:09 PM
To: Davis, Gregory S <[e-mail]>; Cail, William G <[e-mail]>
Subject: FW: [External] RE: HE-0013_Hyd_PSH_04.pdf
Gentlemen,
Steve Brumagin has reviewed the proposed drainage plans for HE-0013 (Leapfrog). In the email below he has posed
some questions and comments that are best addressed by the engineers. If you can, could you please provide him with a
response to address his concerns.
Please let me know if you need anything from me.
Thanks,
Art C. King
Division Environmental Supervisor
NCDOT Highway Division 8
910 773 8015 office
910 690-6581 cell
ackinq .ncdot.gov
121 Dot Drive
Carthage, NC 28327
From: Brumagin, Stephen A (Steve) CIV USARMY CESAW (USA) <[e-mail]>
Sent: Monday, October 16, 2023 2:46 PM
To: King, Art C <[e-mail]>
Subject: [External] RE: HE-0013_Hyd_PSH_04.pdf
CAUTION: External email. Do not click links or open attachments unless verified. Report suspicious emails with the Report Message
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Art,
I have a few comments for you on the HE-0013 Hydro drawing you sent me and things you want to consider for a
permit application (in no particular order):
You do this anyways, but I wanted to encourage you to tell the story about the reasons why NCDOT is proposing to do
this project in a permit application discussion. This can include discussion about the limited capacity of the existing
enclosure system, the flooding of the convenience store access/parking area, NCDOT's desire to have the conveyance of
this tributary out of the existing structure due to maintenance concerns, improved traffic safety, etc..

I think it would also be important to indicate that this project will be directing water into the same area as it currently
flows (minus two trips under the railroad) and if correct, that the proposed relocation will reduce some hydrology from
the tributary indicated between the railroad and the Schwarz property but does not result in a loss of waters in this
tributary due to observed flow in the channel, area of estimated drainage area, aerial photographs, etc.
You will need to provide a discussion that explains why the 15/501 crossing will use two 83" x 57" pipes while the
downstream crossing of Plant Road includes two 48" RCPs. The goal of this discussion will be that the design/placement
of these pipes will assure that the smaller downstream pipes do not pose an impoundment threat.
Please explore options at the outlet of the 48" RCPs under Plant Road to avoid/minimize the
excavation/earthmoving/placement of rock in the area indicated on the plan sheet as wetlands. Since there is some
area there at the outlet that is not indicated as wetlands, I would encourage thoughts of placing energy dissipator or
other rock design that does not affect wetlands. In addition, since there is minor realignment of the existing stream at
the inlet of the 83" x 57" pipes, is there some way to minimize the rock in the channel like what is proposed in the
channel across 15/501(utilizing rock on the side slopes but a natural channel to handle normal flow)? I understand the
need to have rock to protect the inlet, I am just hoping to minimize the rock in the channel along the existing paved
drive to the south end of the Leap Frog site.
Thanks for the opportunity to share some comments. Please let m know if you have any questions.
Stephen A. Brumagin
NCDOT Project Manager
U.S. Army Corps of Engineers,
Charlotte Field Office, Wilmington District
Work cell 704 798-6471
From: King, Art C <[e-mail]>
Sent: Tuesday, October 3, 2023 9:20 AM
To: Brumagin, Stephen A (Steve) CIV USARMY CESAW (USA) <[e-mail]>
Subject: [Non-DoD Source] HE-0013_Hyd_PSH_04.pdf
Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties.
Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties.
Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties.
Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties.
Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties.