20170397 Ver 1_401 Application_20170403

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hdrinc.com
March 31, 2017
U.S Army Corps of Engineers
Charlotte Regulatory Satellite Office
8430 University Executive Park Drive
Charlotte, NC 28269
N.C. Division of Water Resources
401 & Buffer Permitting Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
201 70397
Subject: Duke Energy - Riverbend Steam Station Intake Channel Infill Project
Section 404 Nationwide Permit 39 (Commercial and Institutional Developments)/
Section 401 General Water Quality Certification No. 4092
To Whom It May Concern:
HDR, on behalf of our client, Duke Energy Carolinas, LLC (Duke Energy), is submitting the attached
joint agency Section 404 Nationwide Permit (NWP)/Section 401 Water Quality Certification (WQC)
Pre -Construction Notification (PCN) for a proposed intake channel infill project required for the
demolition of the Riverbend Steam Station (Riverbed) in Gaston County, North Carolina (Figure 1
and Figure 2). A pre -application meeting was held on August 31, 2016 with Duke Energy's plant
demolition project manager, HDR's environmental scientists, and the U.S. Army Corps of
Engineer's (USACE) project manager. The purpose of the meeting was to discuss the proposed
project and associated environmental impacts, and to develop a permitting strategy.
Duke Energy decommissioned the Riverbend coal-fired generating facility on April 1, 2013. The
retired powerhouse is scheduled to undergo demolition beginning in the summer of 2017. In order
to support decommissioning activities of below grade structures, Duke Energy proposes to infill a
portion of the Riverbend intake channel with rip rap. The rip rap infill will be placed with a 2HAV
(horizontal: vertical) slope surface from the bottom of the intake channel extending to the exposed
powerhouse basement to provide support to the external vertical wall during demolition. The
proposed infill project will require placing approximately 5,800 cubic yards of clean rip rap or shot
rock in the intake channel, resulting in approximately 0.2 acres of permanent open water impacts.
The Project Area includes the existing Riverbend powerhouse and a portion of the intake channel
(Catawba River). The surrounding area is developed and consists of access roads and a substation
within adjacent maintained shrub and herbaceous vegetation (Figure 3).
Minimization measures will be implemented to reduce the potential for sedimentation and protect
water quality and aquatic habitat. Rock fill will be washed to remove fine-grained sediment (sand,
silt, and clay) prior to placement in the intake channel. The proposed
440 S Church Street, Suites 900 & 1"-C C-adcae ',C 28202-20'5
[phone]

March 31, 2017
Page 2
stabilized through sediment and erosion control measures, which will be installed and/or and
implemented prior to construction. Any disturbed banks will be sloped back, seeded with native
vegetation, and matted with biodegradable erosion control material. Additionally, a floating turbidity
curtain will be installed in the intake channel downstream of the powerhouse prior to the placement
of fill material and will remain in place during construction activities. These sediment protection
measures will be inspected and maintained throughout the duration of the project.
Table 1 provides a summary of jurisdictional open water impacts identified on the attached project
plans.
Table 1. Summary of Impacts to Waters of the United States
01 01C-02 Catawba River Rip Rap Fill 0.2
The NWP Regional Conditions do not require compensatory mitigation for open water impacts;
therefore, no mitigation activities are proposed.
Agency Correspondence
Cultural Resources
HDR reviewed the National Park Service National Register of Historic Places (NRHP) GIS Public
Dataset and the N.C. Historic Preservation Office (NCHPO) HPOWEB GIS Web Service
(http://gis.ncdcr.gov/hpoweb/). The results of the review indicated that there are no known cultural
resources, historic structures, or historic districts located within the Project Area (Figure 4).
Archaeological data were not included as part of the NCHPO GIS services, therefore, they were not
assessed as part of this study. A request was sent by HDR to the NCHPO (dated March 31, 2017)
for information on historic/cultural resources that could potentially be impacted by the proposed
project. To date, no response has been received from the NCHPO; however, when a response is
received, it will be forwarded promptly to the USACE.
Federally Protected Species
HDR obtained a species list for Gaston County from the U.S. Fish and Wildlife Service's (USFWS)
website (https://www.fws.gov/raleigh/species/cntylist/gaston.htmi), which was last updated on July
24, 2015. Table 2 provides a summary of federally protected species in Gaston County.

March 31, 2017
Page 3
Table 2. Federally Protected Species for Gaston County, North Carolina
BPA = Bald and Golden Eagle Protection Act
E = Endangered. A taxon "in danger of extinction throughout all or a significant portion of its range."
T = Threatened. A taxon "likely to become endangered within the foreseeable future throughout all or a significant
portion of its range."
T(S/A) = Threatened due to similarity of appearance. A taxon that is threatened due to similarity of appearance
with another listed species and is listed for protection. Taxa listed as T(S/A) are not biologically endangered or
threatened and are not subject to Section 7 consultation.
Current = The species has been observed in the county within the last 50 years.
Probable/Potential = the species is considered likely to occur in this county based on the proximity of known
records (in adjacent counties), the presence of potentially suitable habitat, or both.
The review of the USFWS database determined that no potential habitat for federally protected
species exists within the Project Area. The North Carolina Natural Heritage Program (NCNHP) Data
Explorer database was queried for Elemental Occurrence distribution and proximity to the Project
Area and the results of the query are attached to this document (Project Report [NCNHDE-3160]).
The NCNHP Project Report, which was generated on March 20, 2017, summarizes occurrences of
federally and state protected species, critical habitat, and managed areas that have been
documented within a one -mile radius of the Project Area (see attached). The NCNHP Data Explorer
query revealed no known occurrences of federally protected species within or within close proximity
to the Project Area.
Correspondence (March 31, 2017) was sent to the USFWS requesting comments on any potential
issues that may emerge with respect to endangered species, migratory birds, or other resources
from the proposed construction activities. To date, no response has been received from the
USFWS; however, when a response is received, it will be forwarded promptly to the USACE.
We are hereby requesting authorization to proceed with the proposed project under a Section 404
NWP 39 and a Section 401 WQC No. 4092. If you have any questions or require additional
information after your review of the enclosed information, please contact me at [phone] or
[e-mail].
Vertebrates
Haliaeetus
Bald eagle
BGPA
Current
No
leucocephalus
Glyptemys
Bog turtle
T(S/A)
Current
No
muhlenbergii
Probable/
Northern long-eared bat
Myotis septentrionalis
T
No
Potential
Vascular Plants
Dwarf -flowered heartleaf
Hexastylis naniflora
T
Current
No
Schweinitz's sunflower
Helianthus schweinitzii
E
Current
No
BPA = Bald and Golden Eagle Protection Act
E = Endangered. A taxon "in danger of extinction throughout all or a significant portion of its range."
T = Threatened. A taxon "likely to become endangered within the foreseeable future throughout all or a significant
portion of its range."
T(S/A) = Threatened due to similarity of appearance. A taxon that is threatened due to similarity of appearance
with another listed species and is listed for protection. Taxa listed as T(S/A) are not biologically endangered or
threatened and are not subject to Section 7 consultation.
Current = The species has been observed in the county within the last 50 years.
Probable/Potential = the species is considered likely to occur in this county based on the proximity of known
records (in adjacent counties), the presence of potentially suitable habitat, or both.
The review of the USFWS database determined that no potential habitat for federally protected
species exists within the Project Area. The North Carolina Natural Heritage Program (NCNHP) Data
Explorer database was queried for Elemental Occurrence distribution and proximity to the Project
Area and the results of the query are attached to this document (Project Report [NCNHDE-3160]).
The NCNHP Project Report, which was generated on March 20, 2017, summarizes occurrences of
federally and state protected species, critical habitat, and managed areas that have been
documented within a one -mile radius of the Project Area (see attached). The NCNHP Data Explorer
query revealed no known occurrences of federally protected species within or within close proximity
to the Project Area.
Correspondence (March 31, 2017) was sent to the USFWS requesting comments on any potential
issues that may emerge with respect to endangered species, migratory birds, or other resources
from the proposed construction activities. To date, no response has been received from the
USFWS; however, when a response is received, it will be forwarded promptly to the USACE.
We are hereby requesting authorization to proceed with the proposed project under a Section 404
NWP 39 and a Section 401 WQC No. 4092. If you have any questions or require additional
information after your review of the enclosed information, please contact me at [phone] or
[e-mail].

March 31, 2017
Page 4
Respectfully,
HDR Engineering, Inc. of the Carolinas
is
Eric Mularski, PWS
Senior Environmental Scientist
Attachments: Agent Authorization Form
Pre -Construction Notification
Figure 1. Project Location
Figure 2. USGS 24K Quadrangles
Figure 3. Project Aerial
Figure 4. N.C. Historic Preservation Office HPOWEB
NCNHP Project Report
Site Photographs
Project Plans
cc: Ronnie Goodman — Duke Energy
Brian Chrisman — HDR

AGENT AUTHORIZATION FORM
I, Ronnie Goodman hereby certify that I have authorized Eric Mularski, representing HDR
Engineering, Inc. of the Carolinas, to act on my behalf and take all actions necessary to
the processing and issuance of the Section 404.1401 authorization associated with the
Riverbend Steam Station Intake Channel Infill Project located in Gaston County, North
Carolina.
We hereby certify that the information submitted in this application is true and accurate to
the best of our knowledge.
Ronnie Goodman
Applicant's Name
Applicant's Signature
=1,2�1/ 2
Date
hdrinc com
440 South Church Street Suites 900 & 1000, Charlotte NC 28202-2075
T 704.338 6700 F 704 338 6760
Eric Mularski
Agent's Name
Agent's Signature
3/24/2017
Date

Office Use Only:
Corps action ID no.
DWQ project no.
Form Version 1.3 Dec 10 2008
Page 1 of 12
PCN Form — Version 1.3 December 10, 2008 Version
Pre -Construction Notification (PCN) Form
A.
Applicant Information
1.
Processing
1 a.
Type(s) of approval sought from the
Corps:
FZ Section 404 Permit F-1 Section 10 Permit
1 b.
Specify Nationwide Permit (NWP) number: 39 or General Permit (GP) number:
1 c.
Has the NWP or GP number been verified by the Corps? ® Yes
❑ No
1 d.
Type(s) of approval sought from the DWQ (check all that apply):
® 401 Water Quality Certification — Regular ❑ Non -404 Jurisdictional General Permit
❑ 401 Water Quality Certification — Express ❑ Riparian Buffer Authorization
1 e.
Is this notification solely for the record
because written approval is not required?
For the record only for DWQ 401
Certification:
❑ Yes ® No
For the record only for Corps Permit:
❑ Yes ® 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
® No
1 g.
Is the project located in any of NC's twenty coastal counties. If yes, answer 1 h
below.
❑ Yes
® No
1 h.
Is the project located within a NC DCM Area of Environmental Concern (AEC)?
❑ Yes
® No
2.
Project Information
2a.
Name of project:
Duke Energy - Riverbend Steam Station Intake Channel Infill Project
2b.
County:
Gaston
2c.
Nearest municipality / town:
Mount Holly
2d.
Subdivision name:
2e.
NCDOT only, T.I.P. or state
project no:
3.
Owner Information
3a.
Name(s) on Recorded Deed:
Duke Energy Corporation
3b.
Deed Book and Page No.
Deed Book: 1276 Page No -.0517
3c.
Responsible Party (for LLC if
applicable):
3d.
Street address:
175 Steam Plant Road
3e.
City, state, zip:
Mount Holly, NC 28120
3f.
Telephone no.:
3g.
Fax no.:
3h.
Email address:
Page 1 of 12
PCN Form — Version 1.3 December 10, 2008 Version

4.
Applicant Information (if different from owner)
4a.
Applicant is:
❑ Agent ® Other, specify: Utility
4b.
Name:
Ronnie Goodman
4c.
Business name
(if applicable):
Duke Energy Carolinas, Inc.
4d.
Street address:
175 Steam Plant Road
4e.
City, state, zip:
Mount Holly, NC
4f.
Telephone no.:
[phone]
4g.
Fax no.:
4h.
Email address:
[e-mail]
5.
Agent/Consultant Information (if applicable)
5a.
Name:
Eric Mularski
5b.
Business name
(if applicable):
HDR
5c.
Street address:
440 S. Church Street
5d.
City, state, zip:
Charlotte, NC 28202
5e.
Telephone no.:
[phone]
5f.
Fax no.:
5g.
Email address:
eric.mularski(@hdrinc.com
Page 2 of 12

B.
Project Information and Prior Project History
1.
Property Identification
1a.
Property identification no. (tax PIN or parcel ID):
4519-32-2978
Latitude: 35.360579 Longitude: -80.974877
1 b.
Site coordinates (in decimal degrees):
(DD.DDDDDD) (-DD.DDDDDD)
1 c.
Property size:
340.71 acres
2.
Surface Waters
2a.
Name of nearest body of water (stream, river, etc.) to
Catawba River
proposed project:
2b.
Water Quality Classification of nearest receiving water:
WS -IV & B CA
2c.
River basin: map is available at
Catawba
http://h2o.enr.state.nc.us/admin/maps/
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 existing conditions of the Project Area consists of the existing Riverbend powerhouse and intake channel (Catawba
River). The surrounding area is developed consisting of access roads and a substation within adjacent maintained shrub
and herbaceous vegetation,
3b.
List the total estimated acreage of all existing wetlands on the property: 5.7 acres
3c.
List the total estimated linear feet of all existing streams (intermittent and perennial) on the property:
1,800 linear feet
3d.
Explain the purpose of the proposed project:
Duke Energy decommissioned the Riverbend coal-fired generating facility on April 1, 2013. The retired powerhouse is
scheduled to begin demolition in the summer of 2017. In order to support decommissioning activities of below grade
structures, Duke Energy proposes to infill a portion of the Riverbend intake channel with rip rap.
3e.
Describe the overall project in detail, including the type of equipment to be used:
The rip rap infill will be placed with a 2H:1 V (horizontal: vertical) slope surface from the bottom of the intake channel
extending to the exposed powerhouse basement to provide support to the external vertical wall during demolition. The
proposed infill project will require placing approximately 5,800 cubic yards of clean rip rap or shot rock in the intake
channel, resulting in approximately 0.2 acres of permanent open water impacts.
Page 3 of 12
PCN Form — Version 1.3 December 10, 2008 Version

4.
Jurisdictional Determinations
4a.
Have jurisdictional wetland or stream determinations by the
Corps or State been requested or obtained for this property /
project (including all prior phases) in the past?
Comments:
El Yes ®No El Unknown
4b.
If the Corps made the jurisdictional determination, what type
of determination was made?
El Preliminary ❑Final
4c.
If yes, who delineated the jurisdictional areas?
Name (if known):
Agency/Consultant Company:
Other:
4d.
If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation.
5.
Project History
5a.
Have permits or certifications been requested or obtained for
this project (including all prior phases) in the past?
❑ Yes ❑ No ❑ Unknown
5b.
If yes, explain in detail according to "help file" instructions.
6.
Future Project Plans
6a.
Is this a phased project?
❑ Yes ❑ No
6b.
If yes, explain.
Page 4 of 12

C. Proposed Impacts Inventory
1. Impacts Summary
1 a. Which sections were completed below for your project (check all that apply):
❑ 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 jurisdiction
number —
Type of impact
Type of wetland
Forested
(Corps - 404, 10
Area of impact
Permanent (P) or
(if known)
DWQ — non -404, other)
(acres)
Temporary T
❑ Yes
❑ Corps
W1 ❑ P ❑ T
❑ No
❑ DWQ
❑ Yes
❑ Corps
W2 ❑ P ❑ T
❑ No
❑ DWQ
❑ Yes
❑ Corps
W3 ❑ P ❑ T
❑ No
❑ DWQ
❑ Yes
❑ Corps
W4 ❑ P ❑ T
❑ No
❑ DWQ
❑ Yes
❑ Corps
W5 ❑ P ❑ T
❑ No
❑ DWQ
❑ Yes
❑ Corps
W6 ❑ P ❑ T
❑ No
❑ DWQ
2g. Total wetland impacts
2h. Comments:
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
Type of jurisdiction
Average
Impact
number -
(PER) or
(Corps - 404, 10
stream
length
Permanent (P) or
intermittent
DWQ — non -404,
width
(linear
Temporary (T)
(INT)?
other)
(feet)
feet)
❑ PER
❑ Corps
S1 ❑ P ❑ T
❑ INT
❑ DWQ
❑ PER
❑ Corps
S2 ❑ P ❑ T
❑ INT
❑ DWQ
S3 ❑ P ❑ T
❑ PER
❑ INT
❑ Corps
❑ DWQ
S4 ❑ P ❑ T
❑ PER
❑ INT
❑ Corps
❑ DWQ
❑ PER
❑ Corps
S5 ❑ P ❑ T
❑ INT
❑ DWQ
❑ PER
❑ Corps
S6 ❑ P ❑ T
❑ INT
❑ DWQ
3h. Total stream and tributary impacts
3i. Comments:
Page 5 of 12

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 indivi ually 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 ❑ T
Catawba River
Fill
Lake
0.2
02 ❑P❑T
03 ❑P❑T
04 ❑P❑T
0. Total open water impacts
0.2
4g. Comments: The proposed infill project will require approximately 5,800 cubic yards of clean rip rap or shot rock to be
discharged in the intake channel resulting in approximately 0.2 acres of permanent open waters impacts.
5. Pond or Lake Construction
If pond or lake construction proposed, then complete the chart below.
5a.
Pond ID
number
5b.
Proposed use or purpose
of pond
5c.
Wetland Impacts (acres)
5d.
Stream Impacts (feet)
5e.
Upland
(acres)
Flooded
Filled
Excavated
Flooded
Filled
Excavated
Flooded
P1
P2
5f. Total
5g. Comments:
5h. Is a dam high hazard permit required?
❑ Yes ❑ No If yes, permit ID no:
5i. Expected pond surface area (acres):
5j. Size of pond watershed (acres):
5k. Method of construction:
Page 6 of 12

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.
❑ Neuse E] Tar -Pamlico E] Other:
Project is in which protected basin?
❑ Catawba ❑ Randleman
6b.
6c.
6d.
6e.
6f.
6g.
Buffer impact
number —
Reason
Buffer
Zone 1 impact
Zone 2 impact
Permanent (P) or
for
Stream name
mitigation
(square feet)
(square feet)
Temporary T
impact
required
El Yes
B1 ❑P❑T
❑ No
❑ Yes
B2 ❑ P ❑ T
❑ No
El Yes
B3 ❑P❑T
❑ No
6h. Total buffer impacts
6i. Comments:
Page 7of12

D.
Impact Justification and Mitigation
1.
Avoidance and Minimization
1 a.
Specifically describe measures taken to avoid or minimize the proposed impacts in designing project.
The footprint of infill to the intake channel was reduced to the greatest extent possible without compromising the integrity
of the project.
b.
Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques.
Minimization measures will be implemented to reduce the potential for sedimentation and protect water quality and
aquatic habitat. Rock fill will be washed to remove fine-grained sediment (sand, silt, and clay) prior to placement in the
intake channel. The proposed construction area will be stabilized through sediment and erosion control measures, which
will be installed and/or and implemented prior to construction. Any disturbed banks will be sloped back, seeded with
native vegetation, and matted with biodegradable erosion control material. Additionally, a floating turbidity curtain will be
installed in the intake channel downstream of the powerhouse prior to the placement of fill material and will remain in
place during construction activities. These sediment protection measures will be inspected and maintained throughout the
duration of the project.
2.
Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State
2a.
Does the project require Compensatory Mitigation for
❑ Yes ® No
impacts to Waters of the U.S. or Waters of the State?
2b.
If yes, mitigation is required by (check all that apply):
❑ DWQ ❑ Corps
❑ Mitigation bank
2c.
If yes, which mitigation option will be used for this
El Payment to in -lieu fee program
project?
❑ Permittee Responsible Mitigation
3.
Complete if Using a Mitigation Bank
3a.
Name of Mitigation Bank:
3b.
Credits Purchased (attach receipt and letter)
Type
Quantity
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:
❑ warm ❑ cool ❑cold
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:
Page 8 of 12
PCN Form — Version 1.3 December 10, 2008 Version

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.
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? If yes you will have to fill out this entire form — please
contact the State for more information.
❑ 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 9 of 12

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 ® 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
Comments:
2.
Stormwater Management Plan
2a.
What is the overall percent imperviousness of this project?
0%
2b.
Does this project require a Stormwater Management Plan?
❑ Yes ® No
2c.
If this project DOES NOT require a Stormwater Management Plan, explain why:
2d.
If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan:
❑ Certified Local Government
2e.
Who will be responsible for the review of the Stormwater Management Plan?
❑ DWQ Stormwater Program
❑ DWQ 401 Unit
3.
Certified Local Government Stormwater Review
3a.
In which local government's jurisdiction is this project?
❑ Phase II
❑ NSW
3b.
Which of the following locally -implemented stormwater management programs
❑ USMP
apply (check all that apply):
❑ Water Supply Watershed
❑ Other:
3c.
Has the approved Stormwater Management Plan with proof of approval been
❑ Yes ❑ No
attached?
4.
DWQ Stormwater Program Review
❑ Coastal counties
❑ HQW
4a.
Which of the following state -implemented stormwater management programs apply
❑ ORW
(check all that apply):
❑ Session Law 2006-246
❑ Other:
4b.
Has the approved Stormwater Management Plan with proof of approval been
Yes ❑ 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 ❑ No
Page 10 of 12
PCN Form — Version 1.3 December 10, 2008 Version

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)?
1 c.
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
El Yes
E] No
letter.)
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,
❑ Yes
® No
or Riparian Buffer Rules (15A NCAC 2B .0200)?
2b.
Is this an after -the -fact permit application?
❑ Yes
® No
2c.
If you answered "yes" to one or both of the above questions, provide an explanation of the violation(s):
3.
Cumulative Impacts (DWQ Requirement)
3a.
Will this project (based on past and reasonably anticipated future impacts) result in
Yes
®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.
Page 11 of 12
PCN Form — Version 1.3 December 10, 2008 Version

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 ® No
habitat?
5b.
Have you checked with the USFWS concerning Endangered Species Act
® Yes ❑ No
impacts?
❑ Raleigh
5c.
If yes, indicate the USFWS Field Office you have contacted.
® Asheville
5d.
What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical
Habitat?
HDR also consulted the USFWS's Critical Habitat GIS shapefiles and N.C. Natural Heritage Program's (NCNHP) Element
Occurrence database for protected species distribution and proximity to the Project Area.
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?
National Oceanic and Atmospheric Administration's Essential Fish Habitat Mapper v3.0
http://www.habitat.noaa.gov/protection/efh/habitatmapper.html
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 ® 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?
HDR reviewed the National Park Service National Register of Historic Places (NRHP) GIS Public Dataset and the N.C.
Historic Preservation Office (NCHPO) HPOWEB GIS Web Service (http://gis.ncdcr.gov/hpoweb/).
8. Flood Zone Designation (Corps Requirement)
8a.
Will this project occur in a FEMA -designated 100 -year floodplain?
® Yes ❑ No
8b.
If yes, explain how project meets FEMA requirements: The proposed project is not located in a regulated floodway and is
not anticipated to cause a rise in the Base Flood Elevation. A Floodplain Development Permit Application was submitted
to the Gaston County Floodplain Administrator.
8c.
What source(s) did you use to make the floodplain determination? FEMA FIRM Map Panel 4519 Map Date:9/2/2015
Eric Mularski%L
3/31/2017
Applicant/Agent's Printed Name
Date
Applicant/Agent's Signature
(Agent's signature is valid only if an authorization letter from the applicant
is provided.)
Page 12 of 12

LEGEND
Project Location
DATA SOURCE: Esri DeLorme
Tom Tom Intermap USGS FAO NPS
OpenStreetMap contributors
n County, North Carolina
0 Miles 1
so rre
ran! I-,
I Bradley
1-1 In
Nature
FA
TFlicpe.%e
Neck
Rural "M Hgh
Nzeturw
prp-'er",
Latta
Project Plantation
Location` Nature
F're -,e t e
G
A?,
z
Pine island
o
N11 114,11% -Clubuntry
DUKE DUKE ENERGY RIVERBEND STEAM STATION
ENERGY, PROJECT LOCATION
CAROLINAS FIGURE 1
PATH 0 TROJECTS—KE ENERGYMP40979�0UKERV15 INTAKE CHANNELtMXDINWPIPROJECTLOCAnON.MXD -USER EMU1_ARSK -DATE 3,17f1017 RIVERBEND STEAM STATION INTAKE CHANNEL INFILL PROJECT

Uf
LEGEND
6
* Project Location ,` �4C1 i �. ��- ;
DATA SOURCE: USGS 24K Lake Norman'
South Quadrangle 1993 USGS 24K+����
Mountain Island Lake 1997
0x Feet 2,000
�omAt
�f
e 1
:l
:,o ,
i
`I
.N 7
tt
+ � 7
l
- r
,
o) c4
y w
-,N ESX�
h
(
Project`
oV Location
;
rPorrerpiant
o % 4
s � Rozzene L A ✓ — � �'
SBodge
f :;} 6 E
+ TAIf�
M ttin
t i nd. / Y '30 w'� • M�j�
If
DUKE DUKE ENERGY - RIVERBEND STEAM STATION
FN'`'t� ENERGY. USGS 24K QUADRANGLES
CARO'ONA5 FIGURE 2
PATh D IPRDJECTSIDUIE ERERcv'i DDwe7s DUKERV.1MTA.S..ANNEL.A .'N.".SGSQUADS.M.D -ER EMDIAR5k DATE 3 r. rzD+r RIVERBEND STEAM STATION INTAKE CHANNEL INFILL PROJECT

FA -
i
Powerhouse
r`
I
♦ oa
y
4f dye
♦
f'
' Oz
bing
o a

LEGEND
* Project Location
NCHPO Points
Status, Local Status, Historic
District Status
4, NR and Local Landmark
■ SL individual entry
Surveyed Only
Surveyed, Local Landmark
Surveyed Landmark, Gone
DATA SOURCE: http //gis.ncdcr govlhpoweb
0 Feet 2,000
MK1514
Lindsay
Parks House
Project
Location
GS— Duke
Power Relay
Station
•
1)"ke r
MK1452
Allison
House
MK1462
Davidson
MK0009
School Rural
Holly
Hill School)
Bend 19725W,
MK2500dup
Rural
MK1463
Hill Expansion
Old Davidson
Schoolhouse
MK1517
r
Rozzelle
House (Gone)
\1\
A�
MK2697 Eward
M. Rozzell
House 2005
W
Island
•� DUKE DUKE ENERGY - RIVERBEND STEAM STATION
ENERGY. N.C. HISTORIC PRESERVATION OFFICE HPOWEB
CAkOUNAS FIGURE 4
PATH D PRDJECTsou KE_ENEROv'10DU579_OUKERVB INTAKE CHANNELMxD'At-KCHPO-D - USER EMULARSK -DATE an.- RIVERBEND STEAM STATION INTAKE CHANNEL INFILL PROJECT

March 20, 2017
Kelly Thames
HDR, Inc.
440 South Church Street, Suite 1000
Charlotte, NC 28202
RE: Duke RVB Intake Channel; 10040979
Dear Kelly Thames:
ROI' COOPER
SUSI H. 1UNULTON
NCNHDE-3160
The North Carolina Natural Heritage Program (NCNHP) appreciates the opportunity to provide information
about natural heritage resources for the project referenced above.
A query of the NCNHP database, based on the project area mapped with your request, indicates that there are
no records for rare species, important natural communities, natural areas, or conservation/managed areas
within the proposed project boundary. Please note that although there may be no documentation of natural
heritage elements within the project boundary, it does not imply or confirm their absence; the area may not have
been surveyed. The results of this query should not be substituted for field surveys where suitable habitat exists.
In the event that rare species are found within the project area, please contact the NCNHP so that we may
update our records.
The attached 'Potential Occurrences' table summarizes rare species and natural communities that have been
documented within a one -mile radius of the property boundary. The proximity of these records suggests that
these natural heritage elements may potentially be present in the project area if suitable habitat exists and is
included for reference. Tables of natural areas and conservation/managed area within a one -mile radius of the
project area, if any, are also included in this report.
Please note that natural heritage element data are maintained for the purposes of conservation planning, project
review, and scientific research, and are not intended for use as the primary criteria for regulatory decisions.
Information provided by the NCNHP database may not be published without prior written notification to the
NCNHP, and the NCNHP must be credited as an information source in these publications. Maps of NCNHP
data may not be redistributed without permission.
The NC Natural Heritage Program may follow this letter with additional correspondence if a Dedicated Nature
Preserve (DNP), Registered Heritage Area (RHA), Clean Water Management Trust Fund (CWMTF) easement,
or Federally -listed species are documented near the project area.
If you have questions regarding the information provided in this letter or need additional assistance, please
contact Rodney A. Butler at rod ney. butlerna ncdcr go v or 919.707.8603.
Sincerely,
NC Natural Heritage Program

Natural Heritage Element Occurrences, Natural Areas, and Managed Areas Within a One -mile Radius of the Project Area
Duke RVB Intake Channel
Project No. 10040979
March 20, 2017
NCNHDE-3160
Element Occurrences Documented Within a One -mile Radius of the Project Area
Taxonomic
EO ID
Scientific Name
Common Name
Last
Element
Accuracy Federal
State
Global
State
Group
Observation
Occurrence
Status
Status
Rank
Rank
Date
Rank
Butterfly
34493
Neonympha helicta
Helicta Satyr
1940-06-15
H
5 -Very ---
Significantly
G3G4
S1?
Low
Rare
Mammal
29284
Peromyscus polionotus
Oldfield Deermouse
2011-02-20
C?
2 -High ---
Special
G5
S1
Concern
Natural
26516
Basic Mesic Forest
---
2010-08-02
B
3 -Medium ---
---
G3G4
S3S4
Community
(Piedmont Subtype)
Natural
26515
Dry-Mesic Basic
---
2008-09-09
C
3 -Medium ---
---
G3G4
S3
Community
Oak --Hickory Forest
(Piedmont Subtype)
Natural
26517
Dry-Mesic Oak --Hickory
---
2010-08-02
C
3 -Medium ---
---
G4G5
S4
Community
Forest (Piedmont
Subtype)
Vascular Plant
13743
Delphinium exaltatum
Tall Larkspur
1800s
Hi?
5 -Very ---
Endangered
G3
S2
Low
Natural Areas Documented Within a One -mile Radius of the Project Area
Site Name Representational Rating Collective Rating
Mountain Island Lake Forest R2 (Very High) C4 (Moderate)
Managed Areas Documented Within a One -mile Radius of the Project Area
Managed Area Name Owner Owner Type
NC Clean Water Management Trust Fund Easement NC DNCR, Clean Water Management Trust State
Fund
Cowan's Ford Wildlife Refuge Mecklenburg County Local Government
Rozzelles Ferry Nature Preserve Mecklenburg County Local Government
Definitions and an explanation of status designations and codes can be found at https /Incnhde natureserve.org/contentlhelp. Data query generated on March 20, 2017, source: NCNHP, Q1 January 2017. Please resubmit your
information request if more than one year elapses before project initiation as new information is continually added to the NCNHP database.
Page 2 of 3

NCNHDE-3160: Duke RVB Intake Channel
March 20, 2017
❑
Project Boundary
❑
Buffered Project Boundary
❑
NHP Natural Area (NHNA)
Managed Area (MAREA)
w,e N"Y
�l
Page 3 of 3
1:20,395
0 0.175 0.35 0.7 ml
0 0.275 0.55 1.1 km
Sources Esn, HERE, DeLorme. Intermap. increment P Corp.. GEBCO, USES
FAO, NPS, NRCAN, GeoBase. IGN. KadasW NL Ordnance Survey. Esn Japan
METI, Esn Chme (Hong Kong), s isstopo. Mapmylnoia, C OpenStreetMap
coninoutors, and the GIS User Community

■ r '911� Duke Energy - Riverbend Steam Station IntaKe c:nannei inriii
Aerial of Riverbend Steam Station Powerhouse and Intake Channel I
Riverbend Intake Structure and Intake Channel

t
, 4 \
- � 1
/ t
fl ,
_ 0 1.000 2.000 3.000
/16n Feet
Contract Drawings For
HDR Engineering, Inc. of the Cerolines License Number. F-0116
440 5 Church Street, Suite 1000 Charlotte, NC 26202.2075
DUKE ENERGY CAROLINAS, LLC
Riverbend Steam Station
Intake Channel Infill Project
HDR Project No.
10040979
Gaston County, North Carolina
March, 2017
INDEX OF DRAWINGS
COVER SHEET
10040979.01 G-01 INTAKE CHANNEL INFILL PROJECT, GENERAL NOTES
10G40979 -01C-01 INTAKE CHANNEL INFILL PROJECT, POWERHOUSE FILL GRADING, PLAN
1004097MIC-02 INATKE CHANNEL INFILL PROJECT, INTAKE CHANNEL FILL GRADES, PLAN
10040979-01C-03 INTAKE CHANNEL NF LL PROJECT, TYPICAL PROFILE DETAIL

A
PROJECT GENERAL NOTES:
Gi. ALL WORK SHALL BE PERFORMED IN ACCORDANCE WITH APPLICABLE FEDERAL. STATE, AND LOCAL
LAWS AND REGULATIONS. CONTRACTOR SHA'_L BE RESPONSIBLE FOR COMPLIANCE WITH GOVERNING
LAWS AND ORDINANCES FOR WORK PERFORMED.
G2. CONTRACTOR SHALL BE RESPONSIBLE FOR UNDERSTANDING AND COMPLYING WITH OWNER'S
ENVIRONMENTAL, HEALTH AND SAFETY (EHS) RULES AND REQUIREMENTS FOR THE SITE.
G3, PRIOR TO COMMENCING WORK, CONTRACTOR SHALL FIELD VERIFY THE SITE CONDITIONS. SHOULD A
PERCEIVED DISCREPANCY OR CONFLICT BETWEEN PROJECT DRAWINGS AND ACTUAL FIELD CONDITIONS
EXIST, THE CONTRACTOR SHALL PROMPTLY NOTIFY THE OWNER SUCH THAT THE PERCEIVED CONFLICT
CAN BE RESOLVED IN A TIMELY MANNER.
G4 AL QUESTIONS OR CLARIFICATIONS REGARDING PROJECT DRAWINGS OR SPECIFIED REQUIREMENTS
SHA'_L BE SUBMITTED TO THE OWNER VIA WRITTEN REQUEST FOR INFORMATION (RFI). RELEVANT WORK
PERFORMED PRIOR TO RECEIVING A WRITTEN RESPONSE FOR SUBMITTED RFI SHALL BE AT
CONTRACTOR'S RISK IF REWORK IS REQUIRED.
STANDARD EROSION AND SEDIMENT CONTROL NOTES:
E1. THE CONTRACTOR SHALL COORDINATE WITH THE OWNER TO OBTAIN ANY NECESSARY PERMITS TO
SUPPORT THEWORK AS NECESSARY. LAND DISTURBANCE OCCURRING ON THE BANK OF THE INTAKE
CHANNEL AS DESCRIBED ON DRAWING 10040979-01C-03 SHALL NOT BE PERFORMED UNTIL
NECESSARY EROSION AND SEDIMENT CONTROL BEST PRACTICE MEASURES ARE INSTA'-LED AS NECESSARY.
AS APPROVED BY THE OWNER, DISTURBED AREAS THAT ARE COVERED WITH GEOTEXTILE AND INTAKE
CHANNEL FILL THE SAME DAY DISTURBANCE OCCURS MAY NEGATE THE NEED FOR EROSION AND SEDIMENT
CONTROL MEASURES EXCEPT THOSE INSTALLED NEAR THE WATER LINE THAT ARE REQUIRED TO PREVENT
SEDIMENT FROM ENTERING THE WATERWAY DURING CLEARING OF VEGETATION.
E2. EXISTING EROSION AND SEDIMENT CONTROL PERMITS MAY BE ACTIVE AT THE SITE. THE CONTRACTOR
SHALL COORDINATE WITH THE OWNER SUCH THAT WORK ACTIVITIES DO NOT DISRUPT OR INTERFERE
WITH EXISTING EROSION AND SEDIMENT CONTROL REQUIREMENTS.
E3. A FLOATING TURBIDITY CURTAIN SHALL BE INSTALLED IN THE INTAKE CHANNEL AT THE LOCATION
SHOWN ON THE PROJECT DRAWINGS. THE TURBIDITY CURTAIN SHALL BE INSTALLED AND FJLLY
FUNCTIONING PRIOR TO AND DURING PLACEMENT OF INTAKE CHANNEL FILL MATERIALS.
E4, FLOATING TURBIDITY CURTAIN SHALL BE A TYPE 1, MINIMUM 18 OUNCE PER SQUARE YARD
POLYVINYL CHLORIDE (PVC) FABRIC DESIGNED FOR CALM WATERS AND MEETING UNITED STATES
DEPARTMENT OF TRANSPORTATION (DOT) REQUIREMENTS AND SPECIFICATIONS. THE TURBIDITY
CURTAIN SHALL EXTEND TO THE FULL DEPTH OF THE INTAKE CHANNEL AND BE CAPABLE OF
CONTAINING SILT AND SEDIMENT WITHIN THE WORK AREA.
E5. WATTLES AND OTHER BEST PRACTICES SHALL BE IMPLEMENTED TO PREVENT SEDIMENT TRANSPORT
INTO THE INTAKE CHANNEL UNTIL SUCH TIME AS THE OWNER SPECIFIED VEGETATIVE COVER IS
ESTABLISHED IN THE ADJACENT POWERHOUSE FILL AREA.
INTAKE CHANNEL FILL NOTES:
F1, ROCK MATERIALS PLACED AS INTAKE CHANNEL FILL SHALL CONSIST OF RIP RAP OR SHOT ROCK
AS DEFINED BY THE FOLLOWING:
A RIP RAP SHALLCONFORM TO THE REQUIREMENTS OF CLASS B, CLASS 1 OR CLASS 2 RIP RAP
PER SECTION 1042 'RIP RAP MATERIALS' OF THE NORTH CAROLINA DEPARTMENT OF TRANSPORTATION
(NCDOT) '2012 STANDARD SPECIFICATIONS FOR ROADS AND STRUCTURES'.
B. SHOT ROCK SHALs BE DEFINED AS NCDOT CLASS VII SELECT MATERIAL AND CONFORM TO THE
REO JIREMENTS OF SECTION 1016 'SELECT MATERIALS' OF THE NCOOT '2012 STANDARD
SPECIFICATIONS FOR ROADS AND STRUCTURES'.
C. IF SHOT ROCK IS USED FOR CHANNEL INTAKE FILL, THE SHOT ROCK SHO,LD BE WASHED
PRIOR TO PLACEMENT TO REMOVE SAND, SILT AND CLAY MATERIALS IN ORDER TO MINIMIZE THE
QUANTITY OF SEDIMENT PACED IN THE INTAKE CHANNEL. THE CONTRACTOR SHALL BE
PESPONSIB'_E FOR ANY WASHING OR PROCESSING TO MEET MATERIAL REQUIREMENTS AND ANY
WASHING OR PROCESSING MUST OCCUR OFFSITE PRIOR TO DELIVERIOF THE MATERIA'._ TO THE
SITE.
D.AS APPROVED BY THE OWNER, NCDOT x/57 AGGREGATE MAY BE USED ON A LIMITED BASIS TO
FILL VOIDS FOR WHICH RIP RAPOR SHOT ROCK ARE TOO LARGE OR WHERE OWNER DETERMINES
THE USE OF NCDOT #57 BENEFITS THE PROJECT. ALL QUANTITIES OF NCOOT #57 AGGREGATE
SHALL BE APPROVED BY THE OWNER PRIOR TO TRANSPORT OF THE MATERIA_ TO THE SITE.
STOCKPILE NOTES:
SP1. THE OWNER SHALL DESIGNATE AN ON SITE AREA TO STOCKPILE INTAKE CHANNEL FILL. NO MATERIALS
SHALL BE STORED OUTSIDE OF THE OWNER DESIGNATED STOCKPILE AREA UNLESS APPROVED BY THE
OWNER. THE STOCKPILE AREA MAY ALSO SERVE AS THE LAYDOWN/EQUIPMENT STORAGE AREA AS
COORDINATED WITH THE OWNER.
SP2. SILT FENCE SHALL BE INSTALLED AROUND THE PERIMETER OF THE DESIGNATED STOCKPILE AREA. SILT
FENCE SHOULD BE ERECTED IN ACCORDANCE WITH THE REQUIREMENTS OF THE NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY (NCDEQ) "EROSION AND SEDIMENT CONTROL PANNING AND
DESIGN MANUAL." SILT FENCE SHALL BE MAINTAINED PEP. THE REQUIREMENTS OF THE NCDEQ DESIGN
MANUAL THROUGHOUT THE WORK.
STRUCTURAL NOTES:
S1_ THE STRUCTURAL STABILITY OF THE EXTERIOR POWERHOUSE WALL HAS NOT BEEN ANALYZED WITH
RESPECT TO THE ANTICIPATED LOADS IMPARTED BY THE INTAKE CHANNEL BACKFILL. THE CONTRACTOR
SHOULD COORDINATE WITH THE OWNER TO SCHEDULE BACKFILL IN COORDINATION WITH THE
BACKFILLING OF THE INTERIOR OF THE POWERHOUSE. NO REPRESENTATION OF STRUCTURAL STABILITY
OF THE EXTERIOR POWERHOUSE WALL IS MADE BY THESE DRAWINGS.
F)2
HDR Engineering, Inc. of the Carolinas License Number: F-0116
440 S Church Street, Suite 1000 Charlotte, INC 26202.2075
POWERHOUSE FILL NOTES
PHI, MATERIALS USED FOR FILL TO ESTABLISH GRADES WITHIN THE POWERHOUSE LIMITS SHALL BE
DESIGNATED BY THE OWNER AS PART OF THE OVERALL DEMOLITION PROJECT. THESE DRAWINGS
ARE NOT INTENDED TO ADDRESS THE MATERIALS, MEANS, OR METHODS USED FOR BACKFIL-ING
THE POWERHOUSE AREA WITH THE EXCEPTION OF THE GRADES TO BE ESTABLISHED AS SHOWN.
GEOTEXTILE NOTES
GTI NONWOVEN NEEDLE—PJNCHED GEOTEXTILE SHALL CONSIST OF NONWOVEN NETWORK OF
POLYPROPYLENE YARNS AND BE RESISTANT TO BIOLOGICAL DEGRADATION AND NATURALLY
OCCURRING CHEMICALS, ALKALI, AND ACIDS. NONWOVEN GEOTEXTILE SHA',.L MEET THE FOLLOWINGINIMUM REQUIREMENTS:
PHYSICA' PROPERTY (TEST METHODI TEST VALUE
GRAB TENSILE STRENGTH (ASTM D4632)• 205 LBS•
GRAB TENSILE ELONGATION (ASTM C4632)• 50%
CBR PUNCTURE STRENGTH SO LBS'
UV RESISTANCE (500 HOURS) (ASTM D4355) 70% RETENTION
APPARENT OPENING SIZE (ASTM D4751) 0
.18mm
PERMITTIVITY (ASTM D4491) 1.4 SEC -1
'MEASURED IN BOTH THE MACHINE DIRECTION AND CROSS DIRECTION
PRELIMINARY
NOT FOR
CONSTRUCTION
OR
RECORDING
5
6 7 a
oa 10040979 - 01 G-01
DRAWN B`:
.IVG_
DUKE ENERGY CAROLINAS, LLC
RM MAKEE
RIVERBEND STEAM STATION
D E SIG NFD F"
MECHANK-:
BF CHRISMAN
CHECKED BY
WjD1,—CHKCjA—
INTAKE CHANNEL INFILL PROJECT
GENERAL NOTES
ELE('RICA
APPROVED BY.
DATE
—
4rNONE10040979 - 01G-01
1 8
E.EC -, MLCH PRO ECT NUMBER. 1-040975
6 7
H
G
F
E
D

5 6 7 o
1 2 3 4 n
10040979 - 01 C-03
GENERAL NOTES.
- c8O
660 EXISTING i. FOR ADDITIONAL GENERAL NOTES SEE H
POWERHOUSE FOUNDATION OIG -C1
H
POWERHOJSE FILL GRADING FILL VOIDS IN INTAKE STRUCTURE BEYOND
EL 6'1.00 EL 67'. ,0 EXTERIOR POWERHOUSE WALL WITH INTAKE
.. 670 CHANNEL FILL.
6]0
1R=3767 3. INTAKE STRUCTURE AND POWERHOUSE
E'. 665.0° DIMENSIONS INTERPRETEC FROM DRAWINGS
PROVIDED BY THE OWNER. FIELD CONDITIONS
SHOULD BE VERIFIED BY THE CONTRACTOR
660 PRIOR TO COMMENCING THE WORK.
660 - _;� -EX IE ROP 4. RE AVAILABLE GEOTECHNICAL DATA
2
I E WALL REGARDING POTENTIAL SEDIMENT DEPOSITS
I
SEE NOTE 3 IN INTAKE CHANNEL. ORIGINAL DESIGN
.. CONSTRUCTION GRADE OF EL 626.00
G ^ .. ...... _ ..... . _. .. ... .. 650 SHOWN TAKEN FROM ORIGINAL DESIGN G
DRAWINGS AND MAY NOT REPRESENT
w 650 .. - _... ._ ..... _...__ .._._ .. ... AS -BUILT CONDITIONS.
INTAKE
ASSUMED AVERAGE STRUCTURE 5, GEOTEXTILE SHALL BE PLACED BETWEEN
w
WATER LEVEL EL 643.57 INTAKE CHANNEL FILL _ EXISTING GRADE AND CHANNEL INTAKE FILL
z - ABOVE THE WATER -_INE. GEOTEXTILE SHALL
N ... _. .... 640 BE ANCHORED TO EXISTING GROUND PER
0 640 - - .; THE MANUFACTURER'S RECOMMENDATIONS
a FOR SLOPED GROUND.
6, EXISTING GRADE SHALL BE STRIPPED OF
ALL VEGETATION PRIOR TO PLACEMENT OF
- 630 GEOTEXTILE. GEOTEXTILE MUST BE PLACED
630. ,,-----------._<___ _. .. TRIPPING OF
---_ ------------------------
THE SAME DAY THAT S
-- --- --- � VEGETATION OCCURS
-__
FIFIED BY THE F
---___ 7. EARTH FILL MATERIALS SH L- BE
SEE NOTE 4 �`,-------_---EI 621.00 - _... 6^0 THE CPOWERHOUSE DEMOLITION PROJECT;
620 _... _.... -.. ...... .... .._ . .. _... .... .. .... ... SEE NOTE 2 c BESOIL
ME MEETING
THE SHALL GENERALLY
HOWEVER, EARTH FILL
ORIGINAL DESIGN UNIFIED SOIL
CONSTRUCTION GRADE Y SAN
SILTY SAND (SM) OR
SILT (ML) COMPACTED TO A MINIMUM OF
610 927 OF THE MAXIMUM DRY DENSITY AS
DETERMINED BY THE STANDARD PROCTOR
610
(ASTM D698).
TYPICAL SECTION - INTAKE CHANNEL FILL i1
SCALE: I"=10' Ot^-02
E
E
Film
B1
680
670
660
w 650
0 640
630
620
610
1660
_70
660
550
640
630
620
610
10
IC
MID
TYPICAL SECTION - INTAKE CHANNEL FILL
SCALE: 1"=10' OIL -02
SCALE- FEET
DRAWN B`.
�IVIL
DUKE ENERGY CAROLINAS, LLC
RM MAKEE
RIVERBEND STEAM STATION
PRELIMINARY
DESIGNED P'
MEHANI,', .
NOT FOR
BF CHRISMAN
INTAKE CHANNEL INFILL PROJECT A
A
CONSTRUCTION
F)l
CHECKED BY
9�1'r
ELECTRICA_
TYPICAL SECTIONS
OR
APPROVED BY:
DATE.
�+
.wx„-sin �c. EV
sv.AS
HDR Engineering, Inc. of the Carolinas License Number: F•D116 RECORDING D3/ID/7o-] ISSJED FOR PERMIT.
RMM BFC — —
NOTED 10040979 - 01 C-03
440 S Church Street, Suite iDOD Charlotte, INC 28207-2075 PE SEAL No. DATE RE.ISIoN
DRN D<_cNlE,Ec'MECN PRD�ECT NJMDER. IDe409]S
S
4 1 5
7 2 3
6