20201204 Ver 2_20211207 Response to ACOE PCN Reveiw Questions ( with design alteration)_20211205

Strickland, Bev
From: Jonathan Hinkle <[e-mail]>
Sent: Tuesday, January 4, 2022 4:34 PM
To: Roden Reynolds, Bryan K CIV USARMY CESAW (USA)
Cc: Johnson, Alan; Munzer, Olivia; William Sally
Subject: [External] RE: SAW-2020-01271_P (Notice of Incomplete Pre -Construction
Notification)
Attachments: 20211207 Response to ACOE PCN Reveiw Questions ( with design alteration).pdf
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Bryan, Alan, and Oliva,
Please see our response to your questions/comments attached, more than happy to jump on a Teams call if we need to
discuss. Thank you in advance for your assistance on this project.
Thank you,
PI
Jonathan Hinkle, P.E.
o 910.663.4123 1 d 910.250.5290 1 c 910.596.1003
An Equal Opportunity Employer
The LDS! team has joined GPI - Many Talents One Firm
From: Roden Reynolds, Bryan K CIV USARMY CESAW (USA) <[e-mail]>
Sent: Tuesday, December 7, 2021 12:47 PM
To: Jonathan Hinkle <[e-mail]>
Cc: Johnson, Alan <[e-mail]>
Subject: SAW-2020-01271_P (Notice of Incomplete Pre -Construction Notification)
Importance: High
Mr. Hinkle,
On December 7, 2021, we received the Pre -Construction Notification you submitted on behalf of an unknown applicant
on a property located in Mecklenburg County, North Carolina. I have completed my initial review of the report and I
have determined that it is incomplete. The following information is necessary before I will issue a determination:
a. The PCN lacked or didn't clearly define the applicant for the proposed project. Typically, consultants
complete Section B(1)(d) which may help to define the applicant. Therefore, please provide the following
information for the applicant:
- Company name
- Point of contact (first and last name)
- Mailing address
- Telephone number
- Email address
b. The PCN lacked a signed Agent Authorization Form between the applicant (i.e., the person/company who
hired you) and the consultant. Without this signed authorization, the consultant cannot act on behalf of the
1

applicant during the permitting process. Therefore, provide a signed Agent Authorization Form from the
applicant.
c. The PCN lacked the proposed impacts inventory. All temporary and permanent stream and/or wetland
impacts need to be listed within this section. Therefore, please complete Section D, Proposed Impacts
Inventory and revise the PCN accordingly.
Please provide the information requested above in ONE consolidated response within 30-days of the date of this
correspondence. If you do not respond within 30-days, the request will be administratively canceled. Please contact me
via telephone or e-mail if you have any questions.
Thanks,
Bryan Roden -Reynolds, PWS
Regulatory Project Manager
U.S. Army Corps of Engineers
Wilmington District
Charlotte Regulatory Field Office
8430 University Executive Park Drive
Charlotte, NC 28262
Office: [phone]
Per Title VI of the Civil Rights Act of 1964 and other Nondiscrimination statutes, Greenman -Pedersen, Inc. and its related companies
will not discriminate on the grounds of race, color or national origin in the selection and retention of subconsultants, including
procurement of materials and leases of equipment. Greenman -Pedersen, Inc. and its related companies will ensure that minorities
will be afforded full opportunity to submit proposals and will not be discriminated against in consideration for an award.
This communication and any attachments are intended only for the use of the individual or entity named as the addressee. It may
contain information which is privileged and/or confidential under applicable law. If you are not the intended recipient or such
recipient's employee or agent, you are hereby notified that any dissemination, copy or disclosure of this communication is strictly
prohibited and to notify the sender immediately.
2

� ' Many
GPI'LDSI UT McAlpine Creek Phase 1 B Restoration Talents,
One Firm
January 4, 2022
UT McAlpine Creek Phase 1 B Responses to Comments from ACOE
On December 7, 2021, GPI submitted the Pre -Construction Notification for the stream restoration
of UT to McAlpine Creek located in Mecklenburg County, North Carolina. The following are (1)
the missing items requested as well as (2) a response to the comments about tight meanders
posed by Alan Johnson. Also included is (3) a response to NC Wildlife Resource Commission's
comments on the planting plan.
(1) Comments on initial PCN Submittals:
a. The PCN lacked or didn't clearly define the applicant for the proposed project.
Typically, consultants complete Section B(1)(d) which may help to define the applicant.
Therefore, please provide the following information for the applicant:
- Company name
- Point of contact (first and last name)
- Mailing address
- Telephone number
- Email address
Northwood Development
Clifton Coble
Northwood Office, 11605 N.
Community House Rd., Suite 600,
Charlotte, NC 28277
704.248.2081
[e-mail]
b. The PCN lacked a signed Agent Authorization Form between the applicant (i.e., the
person/company who hired you) and the consultant. Without this signed authorization,
the consultant cannot act on behalf of the applicant during the permitting process.
Therefore, provide a signed Agent Authorization Form from the applicant.
Attached below is the Agent Authorization Form.
c. The PCN lacked the proposed impacts inventory. All temporary and permanent stream
and/or wetland impacts need to be listed within this section. Therefore, please
complete Section D, Proposed Impacts Inventory and revise the PCN accordingly.
The proposed stream impacts are temporary and consist of approximately 700
LF of perennial stream. This impact will only occur while the restoration project
is in the construction phase. We did not consider this as an impact because
during the initial PCN submittal because of the purpose of the project being the
enhancement of the stream to a higher ecological function. Conducting a
functional lift assessment of the existing and proposed conditions the proposed
design will offer a functional lift of over 500% to the stream section. This
enhancement is derived from creating a more stable stream corridor through
reconnecting the stream to the floodplain, increasing sinuosity, and restoring
the piedmont riffle pool sequence and enhancing vegetation along the reach; as
opposed to, the current stream profile that consist of a fairly straight, heavily
entrenched reach channel with no riffle pool sequence and multiple vertical
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Many
GPIUT McAlpine Creek Phase 1 B Restoration Talents,
One Firm
drops in excess of multiple feet. This enhancement will increase ecological
activity and create a more stable ecosystem and stream morphology. The
stream has an existing average bankfull width of approximately 7 FT.
(2) Comments From Alan Johnson:
a. Comments: "The meanders appear to be too tight and could cause more erosion
in the meanders due to the energy of the stream flow during larger events. Based
on photos submitted, it may be more prudent to work within the existing pattern
and conduct bank work where needed. It is obvious that benching and laying the
banks back at the two area below would be conducive to more stable/viable
banks. Other photos the issue was much less obvious
b. Response: Thank you for your comments, we have run hydraulic models on
the proposed design and have found that the current proposed design yields
an average shear stress and stream power that are reasonable for a stream
and watershed of this size and characteristics. These parameters also
seemed reasonable when comparing to a similar project within the
Ballantyne community we are currently working on. Our design mimicked
the stream restoration design of similar magnitude for a nearby stream
restoration project located within 1/4 mile from the UT McAlpine Phase 1 B
project. The nearby stream design was done in conjunction with expert
guidance from Dr. Greg Jennings and similar dimensionless ratios were
used to guide the design for UT to McAlpine Phase 1 B. Upon further
examination of the dimensionless ratios and stream parameters provided
within the drawings that were sent with the PCN application we noticed the
discrepancies that were hold overs from a past project that we have
corrected. We have also included a sketch (below Figure 1) of an alignment
change in an approximately 100-foot section just upstream of the proposed
bridge the proposed change will increase the radius of curvature of the bend
and better alleviate shear and erosion at a critical bend before the proposed
bridge. The proposed design increases the entrenchment ratio from an
existing 1.1 to a 2.2. This reconnection will offer a large amount of energy
dissipation into the floodplain during storm event and help mitigate the bank
failures as depicted in the existing condition photos provided in the PCN. As
previously mentioned, the opportunity to restore the riffle -pool sequence by
doing a full restoration is prudent. The existing stream lacks a riffle -pool
sequence typically seen within nearby streams, with several large vertical
drops. The modeled stream power and shear stress along with the
dimensionless ratios used allowed our design team to feel confident that for
radii chosen along with the new channel geometry and would be stable in
most storm event and not lead to bank failure.
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Many
GPI�'LD UT McAlpine Creek Phase 1B Restoration Talents,
One Firm
(Figure 1 : Proposed alignment alteration)
(3) Comments from Oliva Munzer with NC Wildlife Resource Commission:
a. The comments provided by Ms. Munzer regarding the regional planting
species, short native grasses and the extents of planting Zone 3 will be
adjusted to the preferred species and areas.
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GPILDSI Ballantyne Reimagined Phase 1 B —
Many Talents, One Firm
Restoration of UT to McAlpine Creek Trib
AGENT AUTHORIZATION FORM
The purpose of this form is to authorize out firm to act on the behalf in matters related to aquatic
resource (i.e. stream/wetlands) identification/mapping and regulatory permitting. The Owner
Clifton Coble, Northwood Investors, LLC, does hereby authorize, Jonathan Hinkle, PE of
Greenman -Pedersen Inc. to act on its behalf and take all actions necessary for processing,
issuance and acceptance of this permit or certification and any and all standard and special
conditions attached. This authorization is for the project entitled Ballantyne Reimagined Phase
1 B — Restoration of UT to McAlpine Creek Trib.
Project Site Information:
Project/Site Name:
Property Address:
Parcel Identification Number (PIN)
Owner Contact Information:
Name:
Company:
Address:
Phone Number:
Email:
Greenman -Pederson, Inc. Contact:
Address:
Phone Number:
Email:
Clifton Coble,
Project Owner
Ballantvne Reimaained Phase 1 B
Restoration of UT to McAlpine Creek Trib
11713 N Community House Road
Charlotte, NC, 28277
22316102
Clifton Coble
Northwood Development, LLC
11605 N Community House Road #600
Charlotte, NC 28277
704.363.9885
ccoble(a)northwoodoffice.com
1308 HWY 258 N Kinston INC 28504
910.663.4123 Ext. 2125
jhinkle(a�gpinet.com
DATE