20150998 Ver 7_401 Application_20190813

DUKE
ENERGY®
Aug. 5, 2019
Ms. Karen Higgins
NCDEQ-DW R
401 and Buffer Permitting Branch
512 North Salisbury Street
Raleigh, North Carolina 27604
410 S Wilmington St.
Raleigh NC 27601
RE: Pre -Construction Notification — NWP 39 Modification (SAW -2011-00858; DWR-2015-
0998v5)
Duke Energy L.V. Sutton Energy Complex, New Hanover County, NC
Hurricane Florence Emergency Response
Dear Ms. Higgins:
Enclosed is a Pre -Construction Notification (PCN) application to modify an existing NWP 39
(SAW -2011-00858; DWR-2015-0998v5) associated with the Duke Energy L.V. Sutton Energy
Complex located near Wilmington in New Hanover County, North Carolina. In accordance with
Section 404 of the Clean Water Act (33 USC 1344), Duke Energy is requesting authorization for
a modification to the Department of the Army Nationwide Permit (NWP) #39 to disturb Waters of
the United States as part of the L.V. Sutton Energy Complex Hurricane Florence Response
activities. This modification to NWP SAW -2011-00858 and DWR-2015-0998v5 is being
requested because an engineering analysis found an additional 0.20 acres of wetland fill impact
is needed to repair a scour hole area immediately adjacent to a newly constructed dam spillway.
The filling of the scour hole within the wetland is required to provide stability and support to the
spillway. Please find the PCN application, supporting documentation and figures attached.
Please do not hesitate to contact me if you have any questions regarding this PCN application.
Respectfully,
Steve Cahoon
Duke Energy
EHS — CCP Permitting and Compliance
Enclosures

OF N1A7EA
o� pG Office Use Only:
Corps action ID no.
DWQ project
Form Versi 4 J 2009
Zr
Pre -Construction Notification (PCN) Form
A. Applicant Information
1. Processing
1a. Type(s) of approval sought from the Corps:
Q Section 404 Permit ❑ Section 10 Permit
1b. Specify Nationwide Permit (NWP) number: 39 or General Permit (GP) number:
1 c. Has the NWP or GP number been verified by the Corps?
Q Yes ❑ No
1 d. Type(s) of approval sought from the DWQ (check all that apply):
0 401 Water Quality Certification — Regular ❑ Non -404 Jurisdictional General Permit
❑ 401 Water Quality Certification — Express ❑ Riparian Buffer Authorization
le. Is this notification solely for the record
because written approval is not required?
For the record only for DWQ
401 Certification:
❑ Yes ❑X No
For the record only for Corps Permit:
❑ Yes ❑X No
1f. Is payment into a mitigation bank or in -lieu fee program proposed for
mitigation of impacts? If so, attach the acceptance letter from mitigation bank
or in -lieu fee program.
❑ Yes ❑X No
1g. Is the project located in any of NC's twenty coastal counties. If yes, answer 1h
below.
0 Yes ❑ No
1 h. Is the project located within a NC DCM Area of Environmental Concern (AEC)?
❑X Yes ❑ No
2. Project Information
2a. Name of project:
LV Sutton Energy Complex Hurricane Florence Emergency Response (modification)
2b. County:
New Hanover
2c. Nearest municipality / town:
Wilmington
2d. Subdivision name:
N/A
2e. NCDOT only, T.I.P. or state project no:
N/A
3. Owner Information
3a. Name(s) on Recorded Deed:
Carolina Power & Light Co.
3b. Deed Book and Page No.
Book 5753, Page 2451 and Book 5670, Page 111
3c. Responsible Party (for LLC if
applicable):
Duke Energy Progress, LLC
3d. Street address:
249 and 801 Sutton Steam Plant Rd
3e. City, state, zip:
Wilmington, NC 28401
3f. Telephone no.:
3g. Fax no.:
3h. Email address:
Page 1 of 10
PCN Form — Version 1.4 January 2009

4. Applicant Information (if different from owner)
4a. Applicant is:
❑ AgentX❑ Other, specify: Duke Energy Employee
4b, Name:
Steve Cahoon
4c. Business name
(if applicable):
Duke Energy
4d. Street address:
410 S. Wilmington Street
4e. City, state, zip:
Raleigh, NC 27601
4f. Telephone no.:
919-546-7457
4g. Fax no.:
919-546-3669
4h. Email address:
[e-mail]
5. Agent/Consultant Information (if applicable)
5a. Name:
5b. Business name
(if applicable):
5c. Street address:
5d. City, state, zip:
5e. Telephone no.:
5f. Fax no.:
5g. Email address:
Page 2 of 10

B. Project Information and Prior Project History
1. Property Identification
1a. Property identification no. (tax PIN or parcel ID):
R02300-002-001-000 and R02300-001-001-000
1 b. Site coordinates (in decimal degrees): I Latitude: 34.286136 Longitude: 77.996774
1c. Property size:
2,187 acres
2. Surface Waters
2a. Name of nearest body of water to proposed project:
Sutton Lake
2b. Water Quality Classification of nearest receiving water:
C; SW
2c. River basin:
Cape Fear (HUC = 03030005)
3. Project Description
3a. Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this
application:
The site is a decommissioned coal fired electrical generation plant with associated facilities including ash basins and cooling pond (Sutton Lake). The
area around the site is primarily industrial with the Cape Fear River along the west side of the property.
3b. List the total estimated acreage of all existing wetlands on the property: 335
3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property: 4,807
3d. Explain the purpose of the proposed project:
To repair a scour hole within a wetland area adjacent to the toe of the Lake Sutton Dam.
3e. Describe the overall project in detail, including the type of equipment to be used:
To replace the temporary dam repairs with permanent repairs to restore the integrity of the dam with excavators, bulldozers, and dump trucks.
4. Jurisdictional Determinations
4a. Have jurisdictional wetland or stream determinations by the
Corps or State been requested or obtained for this property /
project (includingall prior phases)in the past?
X❑ Yes ❑ No ❑ Unknown
Comments:
4b. If the Corps made the jurisdictional determination, what type
of determination was made?
❑ Preliminary ❑X Final
4c. If yes, who delineated the jurisdictional areas?
Name (if known): Amec Foster wheeler, now wood
Agency/Consultant Company: Amec Foster Wheeler/Wood
Other:
4d. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation.
Field reviews by Corps personnel for the jurisdictional determination were conducted on 2/09/2016. The Approved Jurisdictional Determination has not
been issued at this time.
5. Project History
5a. Have permits or certifications been requested or obtained for
this project (including all prior phases) in the past?
❑R Yes ❑ No ❑ Unknown
5b. If yes, explain in detail according to "help file" instructions.
This PCN is a modification of Nationwide Permit SAW -2011-00858, dated 3120/19. Breach 2 Emergency repairs are under SAW -2018-01861, 9/24/18.
6. Future Project Plans
6a. Is this a phased project?
❑ Yes ❑X No
6b. If yes, explain.
Page 3 of 10
PCN Form — Version 1.4 January 2009

C. Proposed Impacts Inventory
1. Impacts Summary
1a. Which sections were completed below for your project (check all that apply):
❑X Wetlands ❑ Streams —tributaries ❑ Buffers Open Waters ❑ Pond Construction
2. Wetland Impacts
If there are wetland impacts proposed on the site, then complete this question for each wetland area impacted.
2a.
2b.
2c.
2d.
2e.
2f.
Wetland impact
Type of impact
Type of wetland
Forested
Type of jurisdiction
Area of
number
Corps (404,10) or
impact
Permanent (P) or
DWQ (401, other)
(acres)
Temporary T
W1 P
Fill
Piverine Swamp Forest
Yes
Corps
0.2
VV2 -
Choose one
Choose one
Yes/No
-
W3 -
Choose one
Choose one
Yes/No
-
W4 -
Choose one
Choose one
Yes/No
-
W5 -
Choose one
Choose one
Yes/No
-
W6 -
Choose one
Choose one
Yes/No
-
2g. Total Wetland Impacts:
2h. Comments:
Erosion of soil in wetlands that occurred at Breach 1 has resulted in scouring of the wetlands. The new lower surface elevation has allowed water to
pool at the base of Breach 1. The scoured area, which is 0.20 acre, will be filled with sand and silt to replicate natural conditions instead of filling the
void with stone. Duke Energy proposes to restore the wetland elevation in the scoured area to its condition (bottom elevation) prior to Hurricane
Florence to ensure the structural integrity of the dam at permanent Breach 1 repair. See attached figures.
3. Stream Impacts
If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then complete this
question for all stream sites impacted.
3a. 3b. 3c.
3d. 3e. 3f. 3g.
Stream impact Type of impact Stream name
Perennial (PER) or Type of Average Impact
number
intermittent (INT)? jurisdiction stream length
Permanent (P) or
width (linear
Temporary (T)
(feet) feet)
S1 - Choose one
-
S2 - Choose one
-
S3 - Choose one
- -
S4 - Choose one
- -
S5 - Choose one
-
S6 - Choose one
- -
3h. Total stream and tributary impacts
3i. Comments:
Page 4 of 10
PCN Form — Version 1.4 January 2009

4. Open Water Impacts
If there are proposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic Ocean, or any other open water of
the U.S. then individually list all open water impacts below.
4a.
Open water
impact number
Permanent (P) or
Temporary T
4b.
Name of waterbody
(if applicable)
4c.
Type of impact
4d.
Waterbody
type
4e.
Area of impact (acres)
01 P
Power Plant Intake Canal
Fill
Other
0.17
O2 P
Sutton Lake
Fill
Lake
0.27
03 -
Choose one
Choose
04 -
Choose one
Choose
4f. Total open water impacts
0.44
4g. Comments: am repair activities at Breachwill not impact open waters. Open Vilat impact 01 is associated witn cam repair activities a
Breach 2 and Open Water Impact 02 is associated with dam repair activities at Breach 3.
5. Pond or Lake Construction
If Pond or lake construction proposed, the complete the chart below.
5a.
Pond ID number
5b. 5c. 5d. 5e.
Proposed use or Wetland Impacts (acres) Stream Impacts (feet) Upland
purpose of pond (acres)
Flooded Filled Excavated Flooded Filled Excavated
P1
Choose one
P2
Choose one
5f. Total:
5g. Comments:
5h. Is a dam high hazard permit required?
❑ Yes ❑ No If yes, permit ID no:
51. Expected pond surface area (acres):
5j. Size of pond watershed (acres):
5k. Method of construction:
6. Buffer Impacts (for DWQ)
If project will impact a protected riparian buffer, then complete the chart below. If yes, then individually list all buffer impacts
below. If any impacts require mitigation, then you MUST fill out Section D of this form.
6a. Project is in which protected basin?
❑ Neuse ❑ Tar -Pamlico ❑ Catawba ❑ Randleman ❑ Other:
6b.
Buffer Impact
number-
Permanent (P) or
Temporary T
6c.
Reason for impact
6d.
Stream name
6e.
Buffer
mitigation
required?
6f.
Zone 1
impact
(square
feet
6g.
Zone 2
impact
(square
feet
B1 -
Yes/No
B2 -
Yes/No
B3 -
Yes/No
B4 -
Yes/No
B5 -
Yes/No
B6 -
Yes/No
6h. Total Buffer Impacts:
6i. Comments:
Page 5 of 10

D. Impact Justification and Mitigation
1. Avoidance and Minimization
1a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project.
The only wetland impacts will be to fill a 0.20 acre scour that occurred during Hurricane Florence. The scour will be filled with sand and silt to match
the elevation of the surrounding wetlands, allow area to mimic natural conditions, and allow the area to function as a wetland.
1b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques.
Planned construction methods for repairs are set to be completed from on top of the existing dam instead of having equipment travel through wetlands
or open water. Work will be conducted in the existing footprint of the dam to prevent the need for logging or construction mats to drive on.
2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State
2a. Does the project require Compensatory Mitigation for
impacts to Waters of the U.S. or Waters of the State?
❑ Yes ❑X No
2b. if yes, mitigation is required by (check all that apply):
❑ DWQ ❑ Corps
2c. If yes, which mitigation option will be used for this
project?
❑ Mitigation bank
❑Payment to in -lieu fee program
❑ Permittee Responsible Mitigation
3. Complete if Using a Mitigation Bank
3a. Name of Mitigation Bank:
3b. Credits Purchased (attach receipt and letter)
Type: Choose one
Type: Choose one
Type: Choose one
Quantity:
Quantity:
Quantity:
Credits will be purchased with e button lake Oam rearmament project when the total impact number is approved by the Fps.
3c. Comments:
4. Complete if Making a Payment to In -lieu Fee Program
4a. Approval letter from in -lieu fee program is attached. ❑ Yes
4b. Stream mitigation requested: linear feet
4c. If using stream mitigation, stream temperature: Choose one
4d. Buffer mitigation requested (DWQ only): square feet
4e. Riparian wetland mitigation requested: acres
4f. Non -riparian wetland mitigation requested: acres
4g. Coastal (tidal) wetland mitigation requested: acres
4h. Comments:
5. Complete if Using a Permittee Responsible Mitigation Plan
5a. If using a permittee responsible mitigation plan, provide a description of the proposed mitigation plan.
Page 6 of 10
PCN Form — Version 1.4 January 2009

6. Buffer Mitigation (State Regulated Riparian Buffer Rules) — required by DWQ
6a. Will the project result in an impact within a protected riparian buffer that requires
buffer mitigation?
Yes No
6b. If yes, then identify the square feet of impact to each zone of the riparian buffer that requires mitigation. Calculate the
amount of mitigation required.
Zone
6c.
Reason for impact
6d.
Total impact
(square feet)
Multiplier
6e.
Required mitigation
(square feet)
Zone 1
3 (2 for Catawba)
Zone 2
1.5
6f. Total buffer mitigation required:
6g. If buffer mitigation is required, discuss what type of mitigation is proposed (e.g., payment to private mitigation bank,
permittee responsible riparian buffer restoration, payment into an approved in -lieu fee fund).
6h. Comments:
Page 7 of 10

E. Stormwater Management and Diffuse Flow Plan (required by DWQ)
1. Diffuse Flow Plan
1 a. Does the project include or is it adjacent to protected riparian buffers identified
❑ Yes X❑ No
within one of the NC Riparian Buffer Protection Rules?
1 b. If yes, then is a diffuse flow plan included? If no, explain why.
❑ Yes ❑ No
2. Stormwater Management Plan
2a. What is the overall percent imperviousness of this project?
18%
2b. Does this project require a Stormwater Management Pian?
❑ Yes 0 No
2c. If this project DOES NOT require a Stormwater Management Plan, explain why:
The Duke Energy LV Sutton Energy Complex has an existing Stormwater Management Plan. The proposed breach repairs will route stormwater to
existing stormwater management areas.
2d. if this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan:
2e. Who will be responsible for the review of the Stormwater Management Plan? N/A
3. Certified Local Government Stormwater Review
3a. In which localgovernment's jurisdiction is thisproject?
❑ Phase II
❑ NSW
3b. Which of the following locally -implemented stormwater management programs
El USMP❑
apply (check all that apply):
Water Supply Watershed
0 Other: State Stormwater
3c. Has the approved Stormwater Management Plan with proof of approval been
❑ Yes ❑X No
attached?
4. DWQ Stormwater Program Review
NCoastal counties
❑HQW
4a. Which of the following state -implemented stormwater management programs apply
❑ORW
(check all that apply):
F1 Session Law 2006-246
❑Other:
4b. Has the approved Stormwater Management Plan with proof of approval been
❑ Yes ❑X No
attached?
5. DWQ 401 Unit Stormwater Review
5a. Does the Stormwater Management Plan meet the appropriate requirements?
❑ Yes ❑ No
5b. Have all of the 401 Unit submittal requirements been met?
❑ Yes [j No
Page 8 of 10
PCN Form — Version 1.4 January 2009

F. Supplementary Information
1. Environmental Documentation (DWQ Requirement)
1 a. Does the project involve an expenditure of public (federal/state/local) funds or the
❑ Yes No
use of public (federal/state) land?
1 b. If you answered 'yes" to the above, does the project require preparation of an
environmental document pursuant to the requirements of the National or State
❑ Yes ❑ No
(North Carolina) Environmental Policy Act (NEPA/SEPA)?
1c. If you answered "yes" to the above, has the document review been finalized by the
State Clearing House? (if so, attach a copy of the NEPA or SEPA final approval
letter.)
❑ Yes ❑ No
Comments:
2. Violations (DWQ Requirement)
2a. Is the site in violation of DWQ Wetland Rules (15A NCAC 2H .0500), Isolated
Wetland Rules (15A NCAC 2H .1300), DWQ Surface Water or Wetland Standards,
❑YesX❑ No
or Riparian Buffer Rules (15A NCAC 2B .0200)?
'
2b. Is this an after -the -fact permit application?
❑ Yes ❑X No
2c. If you answered 'yes" to one or both of the above questions, provide an explanation of the violation(s):
There has been a permanent permitted repair completed at Breach 2, but not at Breaches 1 or 3. A pre -application meeting with the USACE
Wilmington Office was conducted on December 11, 2018. Since the repairs conducted on site were during the emergency status of Hurricane
Florence, the Breach 2 repairs are not considered after -the -fact. All three repairs are being permitted together, as requested by the USACE.
Emergency repairs for Breach 2 were authorized by the Corps as Emergency Individual Permit (ORM) Action ID SAW -2018-01861, dated 9/24/18.
3. Cumulative Impacts (DWQ Requirement)
3a. Will this project (based on past and reasonably anticipated future impacts) result in
❑ Yes ❑X No
additional development, which could impact nearby downstream water quality?
3b. If you answered "yes" to the above, submit a qualitative or quantitative cumulative impact analysis in accordance with the
most recent DWQ policy. If you answered "no," provide a short narrative description.
4. Sewage Disposal (DWQ Requirement)
4a. Clearly detail the ultimate treatment methods and disposition (non -discharge or discharge) of wastewater generated from
the proposed project, or available capacity of the subject facility.
The project will not generate wastewater.
Page 9 of 10
PCN Form — Version 1.4 January 2009

5. Endangered Species and Designated Critical Habitat (Corps Requirement)
5a. Will this project occur in or near an area with federally protected species or
❑ Yes ❑X No
habitat?
5b. Have you checked with the USFWS concerning Endangered Species Act
El Yes ❑X No
impacts?
5c. If yes, indicate the USFWS Field Office you have contacted.
-
5d. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical
Habitat?
Onsite habitat evaluations, inspection of online GIS data from the US Fish and Wildlife Service (IPaC), Raleigh Ecological Field Services Office
website, and inspection of online GIS data and mapping from the NC Natural Heritage Program.
6. Essential Fish Habitat (Corps Requirement)
6a. Will this project occur in or near an area designated as essential fish habitat?
❑Yes © No
6b. What data sources did you use to determine whether your site would impact Essential Fish Habitat?
Inspection of online data and mapping from the South Atlantic Habitat and Ecosystem Atlas website.
7. Historic or Prehistoric Cultural Resources (Corps Requirement)
7a. Will this project occur in or near an area that the state, federal or tribal
governments have designated as having historic or cultural preservation
❑ Yes ❑X No
status (e.g., National Historic Trust designation or properties significant in
North Carolina history and archaeology)?
7b. What data sources did you use to determine whether your site would impact historic or archeological resources?
Inspection of online GIS data and mapping from the NC State Historic Preservation website.
8. Flood Zone Designation (Corps Requirement)
8a. Will this project occur in a FEMA -designated 100 -year floodplain?
❑X Yes ❑ No
8b. If yes, explain how project meets FEMA requirements:
The only 0.20 acres of wetland fill are restoring the the scour to wetland elevation prior to Hurricane Florence. Therefore, FEMA flood elevations will
not be impacted.
8c. What source(s) did you use to make the floodplain determination?
NC Flood Maps, FEMA FIRM numbers 3720310900L, 3720320000L, 3720229000L, and 3720219900L, dated August 28, 2018.
54e kCAA
Applicant/Agent's Printed Name
Applicant/Agent's Signature
Date
(Agent's signature is valid only if an authorization
letter from the applicant isprovided.)
Page 10 of 10

Figure 1. Site Location
LV Sutton Energy Complex
Hurricane Florence Emergency Response
New Hanover County, NC
Legend
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New Hanover County, NC
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Sutton Boundary
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NWP 39 Mod
Wetland Scour Cross Section
L.V. Sutton Energy Complex
Sutton Lake Dam Rearmament
and Vegetation Removal Project
New Hanover County, NC
& DUKE
%,' ENERGY.
wood.
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Total Permanent Wetland E Impact
0.2 ac
I
Wetland Scour XS
South North
18'
16
14'
12' Wetland E IN Extent)
Sutton Lake Water Edge
10' Pro -Hurn lane Land Elevation
8' - --00,,C
6'----
4, o
2'
Or - `
-2- Wetland Fill Impact � � � i V
-4'
-6'
0 20 40 60 80 100 120 140 160
Feet