FW_ [External] RE_ C204553 78_ RCP As-built

From:Gingrich, Sophia E
To:Steffens, Thomas A CIV USARMY CESAW (USA); Sprinkle, Hannah H; Lane, Stephen
Cc:Westphal, Anneliese; Farrell, Sean C
Subject:FW: [External] RE: C204553 78" RCP As-built
Date:Thursday, February 2, 2023 2:41:08 PM
Attachments:image001.png
image005.png
Tom, Hannah, and Stephen,

See the forwarded email from Ben below. Conti placed native material in the channel at the inlet and
outlet of the 78” RCP on 1/27/23. Ben included pictures of the inlet and outlet and the as-built shots
Conti provided. Based on their shots, it seems to be sufficiently buried. We can have them recheck the
elevations in next few months to see how well the material stays. During the operation, Conti placed
sandbags across the channel upstream of the inlet and pumped the water into an adjacent skimmer
basin. Coir fiber matting was placed over the native material to provide some stability and minimize any
movement. They waited until after localized turbidity settled out before they removed the sandbags and
released the flow through the pipe. Let us know if you have any questions or comments. We will
continue to monitor the area over the next few months.

Thank you,

Sophia Gingrich
Environmental Specialist I
Division 3
NCDOT – Division of Highways

From: Farrell, Sean C <[e-mail]>
Sent: Thursday, February 2, 2023 1:11 PM
To: Meyer (RK & K Civil Engineering), Benjamin C <[e-mail]>
Cc: Waugh, Daniel G <[e-mail]>; Herndon, T. Mason <[e-mail]>; Westphal,
Anneliese <[e-mail]>; Gingrich, Sophia E <[e-mail]>
Subject: RE: [External] RE: C204553 78" RCP As-built

Ben,

Thanks for the information. Appears sufficiently buried. Do you think this material will stay? We will
forward to the agencies. They will probably want to recheck these elevations in the coming months.

Thanks,

Sean Farrell
GIS Analyst
Division 3
NCDOT- Division of Highways

910-341-2033 office
910-599-1184 mobile
[e-mail]

5501 Barbados Blvd
Castle Hayne, NC 28429

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

From: Meyer (RK & K Civil Engineering), Benjamin C <[e-mail]>
Sent: Thursday, February 2, 2023 10:55 AM
To: Farrell, Sean C <[e-mail]>
Cc: Waugh, Daniel G <[e-mail]>; Herndon, T. Mason <[e-mail]>; Westphal,
Anneliese <[e-mail]>; Gingrich, Sophia E <[e-mail]>
Subject: RE: [External] RE: C204553 78" RCP As-built

Sean,
Conti placed native material at the inlet and outlet of the 78” RCP JS Stream on 1/27/2023. They
provided me with the confirmation as-built shots yesterday. Please let me know if you have any
questions.
Cheers,
Ben

Point
Name
Elevation Point Code
1 36.04 Invert In Pipe
2 37.05 Invert In Material
3 37.07 inlet - 10'
4 37.26 inlet - 20'

1 34.81 Invert Out Pipe
2 36.03 Invert Out
Material
3 35.76 out - 10'
4 35.39 out - 20'
5 34.86 out - 30'

Ben Meyer, PE, CCM
Assistant Resident Engineer
Hampstead Bypass
Cell: 910-617-1902
[e-mail]
[e-mail]

From: Farrell, Sean C <[e-mail]>
Sent: Thursday, January 12, 2023 8:35 AM
To: Meyer (RK & K Civil Engineering), Benjamin C <[e-mail]>
Cc: Waugh, Daniel G <[e-mail]>; Herndon, T. Mason <[e-mail]>; Westphal,
Anneliese <[e-mail]>; Gingrich, Sophia E <[e-mail]>
Subject: FW: [External] RE: C204553 78" RCP As-built

Ben,

Please see below email from Tom and my response to him. The pipe will need to compliant with the
permit conditions regarding burial and aquatic organism passage and with the permit drawings. The
agencies are ok with monitoring for now but if the site fails to accrete enough sediment to meet the
conditions, corrective action will be required. It is up to your office and the contractor whether to take
immediate corrective action or monitor. The current phase of construction may be more conducive for
making the necessary repairs. Please keep us updated on how the contractor plans to proceed so we can
update the agencies.

Thanks,

Sean Farrell
GIS Analyst
Division 3
NCDOT- Division of Highways

910-341-2033 office
910-599-1184 mobile
[e-mail]

5501 Barbados Blvd
Castle Hayne, NC 28429

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

From: Farrell, Sean C
Sent: Thursday, January 12, 2023 8:21 AM
To: Steffens, Thomas A CIV USARMY CESAW (USA) <[e-mail]>; Sprinkle,
Hannah H <[e-mail]>; Lane, Stephen <[e-mail]>
Cc: Westphal, Anneliese <[e-mail]>
Subject: RE: [External] RE: C204553 78" RCP As-built

Tom,

I appreciate you clearly stating your expectations and the associated permit condition. We will make
sure this information is communicated to the Resident’s Office and contractor. We will give them the
option of correcting the issue now or monitoring with the potential to have to take corrective action
later if conditions don’t meet the required burial. We will follow back up with you all with how the
contractor plan’s to proceed. As I mentioned to you on the phone, at culvert # 10 (wetland site 3 ) we
are requiring the contractor to re-dewater and charge the culvert with native material as noted on the
permit drawings (Permit Drawing Sheet 42 of 162).

Thanks,

Sean Farrell
GIS Analyst
Division 3
NCDOT- Division of Highways

910-341-2033 office
910-599-1184 mobile
[e-mail]

5501 Barbados Blvd
Castle Hayne, NC 28429

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

From: Steffens, Thomas A CIV USARMY CESAW (USA) <[e-mail]>
Sent: Wednesday, January 11, 2023 5:43 PM
To: Farrell, Sean C <[e-mail]>; Sprinkle, Hannah H <[e-mail]>; Lane,
Stephen <[e-mail]>
Cc: Westphal, Anneliese <[e-mail]>
Subject: [External] RE: C204553 78" RCP As-built

CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to Report Spam.

Sean,

The Corps agrees to monitor the accretion of sediment at in the 72”RCP (2304).
No corrective action on this structure needs to be taken at this time, but future
conditions may warrant mitigative measures to ensure permit compliance.

Be advised that future culvert/pipe installations (in JS or relocated JS streams
where the 1ft burial provision applies) should be reviewed for proper elevations
on finished construction. This includes any constructed conveyances draining into
and out of the structure. Any recovery operations needed for sediment losses
should also be closely monitored to prevent over/under excavation issues that
require corrective action.

Please note there is a permit Special Condition that specifically refers to culverts
and the need to ensure aquatic life passage at low water. As such, failure to bury,
pre-load or grade conveyances appropriately to a structure where this permit
condition applies may lead to remedial actions including, but not limited to, non-
compliance and or enforcement actions.

Thomas A Steffens
Regulatory Project Manager
US Army Corps of Engineers
2407 West 5th Street
Washington, NC 27889
(910)-251-4615

We at the U.S. Army Corps of Engineers Regulatory Branch are committed to
improving service to our customers. We would appreciate your feedback on how
we are performing our duties. Our automated Customer Service Survey is located
at: https://regulatory.ops.usace.army.mil/customer-service-survey/

From: Farrell, Sean C <[e-mail]>
Sent: Wednesday, January 11, 2023 8:32 AM
To: Steffens, Thomas A CIV USARMY CESAW (USA) <[e-mail]>; Sprinkle,
Hannah H <[e-mail]>; Lane, Stephen <[e-mail]>
Cc: Westphal, Anneliese <[e-mail]>
Subject: [URL Verdict: Neutral][Non-DoD Source] FW: C204553 78" RCP As-built

Tom, Hannah, and Stephen

Please see the below email from Ben and the as-built elevations of the 72” RCP. It appears the pipe
inverts where set at the correct elevations, but the ditch was slightly over excavated (possibly a result of
loss retrieval efforts). Mason and I have discussed this and we would like to avoid the contractor having
to go in and regrade the ditch at this stage. We think the pipe is buried enough on the inlet and being
that it is about at grade on the outlet, it should continue to accrete sediment over time. We would like
to continue to monitor this instead of taking immediate corrective action if you are in agreeance. Please
let me know your thoughts on this.

Thanks,

Sean Farrell
GIS Analyst
Division 3
NCDOT- Division of Highways

910-341-2033 office
910-599-1184 mobile
[e-mail]

5501 Barbados Blvd
Castle Hayne, NC 28429

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

From: Meyer (RK & K Civil Engineering), Benjamin C <[e-mail]>
Sent: Tuesday, January 10, 2023 1:51 PM
To: Farrell, Sean C <[e-mail]>
Cc: Westphal, Anneliese <[e-mail]>; Gingrich, Sophia E <[e-mail]>; Waugh,
Daniel G <[e-mail]>; Jackson Provost, PE, PLS <[e-mail]>;
Brandon Helms <[e-mail]>
Subject: C204553 78" RCP As-built

Sean,
Attached and below are the as-builts for the inverts of the ditch and 78” pipe at the US17 area. The
inverts and outlet have been over excavated during the retrieval of the sediment from the storm event
that occurred 12/22/2022 -12/23/2022. Concerns if we add material:
Inlet side will creating a head cut with most of the material washing into the pipe until an
equilibrium is met.
Outlet side adding material will impound water inside of the pipe.
There was not a note or provision to place material inside of the pipe to help equalize the system

The typical Safe Passage Requirements for Culvert Placement permit provision was not included in the
C204553 Permits. To date the Conti has been submitting their drainage investigations for review, which
are meeting the Safe Passage Requirements for Culvert Placement.

Please advise if corrective action or monitoring of the area is required. Let us know if there is any
additional information needed.

Point Name Northing Easting Elevation Point Code
1 238759.614 2399860.25 34.814 Invert Out Pipe
2 239166.444 2400004.239 36.047 Invert In Pipe
3 238750.7 2399856.938 34.867 out - 10'
4 238740.679 2399854.203 34.803 out - 20'
5 238729.534 2399851.255 34.584 out - 30'
6 239175.397 2400010.492 36.212 inlet - 10'
7 239184.057 2400016.344 36.43 inlet - 20'
8 239192.39 2400022.265 36.604 inlet - 30'

Cheers,
Ben

Ben Meyer, PE, CCM
Assistant Resident Engineer
Hampstead Bypass
Cell: 910-617-1902
[e-mail]
[e-mail]

From: Hunter Livingstone <[e-mail]>
Sent: Monday, January 9, 2023 6:57 AM
To: Meyer, Benjamin C <[e-mail]>
Cc: Bryce Locke <[e-mail]>; Brandon Ulishney <[e-mail]>; James Day
<[e-mail]>; John Kristensen <[e-mail]>; Michael Sullivan
<[e-mail]>; Zachary Fuller <[e-mail]>; Brandon Helms
<[e-mail]>; Jackson Provost, PE, PLS <[e-mail]>
Subject: RE: [External] 78" RCP As-built

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attachment to Report Spam.

Ben,

Please see attached information along with table below. Let me know if you have any questions.

Point Name Northing Easting Elevation Point Code
1 238759.614 2399860.25 34.814 Invert Out Pipe
2 239166.444 2400004.239 36.047 Invert In Pipe
3 238750.7 2399856.938 34.867 out - 10'
4 238740.679 2399854.203 34.803 out - 20'
5 238729.534 2399851.255 34.584 out - 30'
6 239175.397 2400010.492 36.212 inlet - 10'
7 239184.057 2400016.344 36.43 inlet - 20'
8 239192.39 2400022.265 36.604 inlet - 30'

Hunter Livingstone | Project Engineer
18087 U.S. 17
Hampstead, NC 28443
o. 910.524.2234 | m. 910.524.2234
[e-mail]

Done Once, Done Right

ContiCivil.com | Facebook | LinkedIn
a member of The Conti Group
CAUTION: This email originated from outside of the organization. Use caution when clicking links or opening attachments.
The sender may not be who they appear to be.

From: Meyer, Benjamin C <[e-mail]>
Sent: Friday, January 6, 2023 9:01 AM
To: Hunter Livingstone <[e-mail]>
Cc: Bryce Locke <[e-mail]>; Brandon Ulishney <[e-mail]>; James Day
<[e-mail]>; John Kristensen <[e-mail]>; Michael Sullivan
<[e-mail]>; Zachary Fuller <[e-mail]>; Brandon Helms
<[e-mail]>; Jackson Provost, PE, PLS <[e-mail]>
Subject: RE: [External] 78" RCP As-built

Hunter,
That provides us the information for the 78” pipe invert is correct per the accepted drainage
investigation. As noted in the plans and drainage investigation the pipe is supposed to be buried 1’ as
part of the environmental requirement. We also need the grades shot at least every 10’ for
approximately 30’ from the invert and outlet. During the retrieval of the sediment after the rain event
on 12/22-12/23 the area may have been over excavated. Currently, it appears that the ditches on either
side of the pipe were graded to match the invert of the pipe. Please provide us with the additional
information for the ditch grades. Let us know if you have any questions.
Cheers,
Ben

Ben Meyer, PE, CCM
Assistant Resident Engineer
Hampstead Bypass
Cell: 910-617-1902
[e-mail]
[e-mail]

From: Hunter Livingstone <[e-mail]>
Sent: Friday, January 6, 2023 8:38 AM
To: Meyer, Benjamin C <[e-mail]>
Cc: Bryce Locke <[e-mail]>; Brandon Ulishney <[e-mail]>; James Day
<[e-mail]>; John Kristensen <[e-mail]>; Michael Sullivan
<[e-mail]>; Zachary Fuller <[e-mail]>; Brandon Helms
<[e-mail]>
Subject: [External] 78" RCP As-built

CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to Report Spam.

Ben,

Please see attached CSV file from as-built on 78” RCP pipe run 2304.

Point Name Northing Easting Elevation Point Code
1 238759.6 2399860 34.814 Invert Out
2 239166.4 2400004 36.047 Invert In

Any questions please let me know.

Hunter Livingstone | Project Engineer
18087 U.S. 17
Hampstead, NC 28443
o. 910.524.2234 | m. 910.524.2234
[e-mail]

Done Once, Done Right

ContiCivil.com | Facebook | LinkedIn
a member of The Conti Group

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.