NCG500136_complete file-historical_20120803

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NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue
Govemor
Mr. Allen Stowe, Jr.
Duke Energy Corporation
526 South Church Street / EC 13K
Charlotte, NC 28202
Dear Permittee:
Charles Wakild, P.E.
Director
August 3, 2012
Dee Freeman
Secretary
Subject: Renewal of coverage / General Permit NCG500000
Nantahala Hydroelectric Station
Certificate of Coverage NCG500136
Macon County
The Division is renewing Certificate of Coverage (CoC) NCG500136 to discharge under NPDES
General Permit NCG500000. This CoC is issued pursuant to the requirements of North Carolina General
Statue 143-215.1 and the Memorandum of Agreement between North Carolina and the US Environmental
Protection agency dated October 15, 2007 [or as subsequently amended].
If any parts, measurement frequencies or sampling requirements contained in this General Permit
are unacceptable to you, you have the right to request an individual permit by submitting an individual
permit application. Unless such demand is made, the certificate of coverage shall be final and binding.
Please take notice that this Certificate of Coverage is not transferable except after notice to the
Division. The Division may require modification or revocation and reissuance of the certificate of coverage.
Contact the Asheville Regional Office prior to any sale or transfer of the permitted facility.
Regional Office staff will assist you in documenting the transfer of this CoC.
This permit does not affect the legal requirements to obtain other permits which may be required by
the Division of Water Quality or permits required by the Division of Land Resources, Coastal Area
Management Act or any other Federal or Local governmental permit that may be required.
If you have any questions concerning the requirements of the General Permit, please contact John
Hennessy [919 807-6377 or [e-mail]].
Sincerely,
Original signed by John Hennessy
for Charles Wakild, P.E.
cc: Asheville Regional Office / Surface Water Protection
NPDES file
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
512 North Salisbury Street, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Intemet: www.ncwaterquality.org
An Equal Opportunity/Affirmative Action Employer —50% Recycled/10% Post Consumer Paper
None
rthCarohna
Naturally

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
GENERAL PERMIT NCG500000
CERTIFICATE OF COVERAGE NCG500136
TO DISCHARGE NON -CONTACT COOLING WATER, COOLING TOWER AND
BOILER BLOWDOWN, CONDENSATE AND SIMILAR WASTEWATERS UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards and
regulations promulgated and adopted by the North Carolina Environmental Management Commission, and
the Federal Water Pollution Control Act, as amended,
Duke Energy Corporation
is hereby authorized to discharge Hydroelectric Dam Sumps & Non -contact Cooling Water
from a facility located at
Nantahala Hydroelectric Station
27868 Wayah Road
Franklin
Macon County
to receiving waters designated as the Nantahala River in subbasin 04-04-03 of the Little
Tennessee River Basin in accordance with the effluent limitations, monitoring
requirements, and other conditions set forth in Parts I, II, III and IV hereof.
This Certificate of Coverage shall become effective August 3, 2012.
This Certificate of Coverage shall remain in effect for the duration of the General Permit.
Signed this day August 3, 2012
Original signed by John Hennessy
for Charles Wakild, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Division ' 0 of Water Quality / Water Quality Section
NCDENRNational Pollutant Discharge Elimination System
*!.'YfM m1RCLwA Dehwr►evr tw
F► M4KFYf AImG KnuiAi RrgC. ra
NCG500000
FOR AGENCY USE ONLY
Date Received
Year Month Da
Certificate of Covera e
Check # Amount
Permit Assigned to
NOTICE OF INTENT
National Pollutant Discharge Elimination System application for coverage under General Permit
NCG500000: Non -contact cooling water, boiler blowdown, cooling tower blowdown, condensate, and
similar point source discharges
(Please print or type)
1) Mailing address of ownerloperator:
Company Name Duke Energy Carolinas, LLC
Owner Name Allen Stowe - Water Management
Street Address 526 South Church Street, Interoffice - EC13K
City Charlotte
Telephone No. [phone]
* Address to which all permit correspondence will be mailed
2) Location of facility producing discharge:
State N.C. ZIP Code 28202
Fax: [phone]
Facility Name Nantahala Hydroelectric Station
Facility Contact Gary Morgan
Street Address 27656 Wayah Road
City Topton State NC ZIP Code 28781
County Macon
Telephone No. 828 369-4605 Fax: NA
3) Physical location information:
Please provide a narrative description of how to get to the facility (use street names, state road numbers,
and distance and direction from a roadway intersection). At Exit 64 on Hwy 74 W, continue on 74 for 17.5 miles. Turn left on Wayah Rd.
Nantahala Hydro is 0.2 mile on right.
(A copy of a county map or USGS quad sheet with facility clearly located on the map is required to be submitted with this application)
4) This NPDES permit application applies to which of the following :
❑ New or Proposed
❑ Modification
Please describe the modification:
8 Renewal
Please specify existing permit number and original issue date:
5) Does this facility have any other NPDES permits?
B No
❑ Yes
If yes, list the permit numbers for all current NPDES permits for this facility:
6) What is the nature of the business applying for this permit? Electric Generation
Page 1 of 4 04/05

i
NCG500000 N.O.I.
7) Description of Discharge:
a) Is the discharge directly to the receiving water? B Yes ❑ No
If no, submit a site map with the pathway to the potential receiving waters clearly marked. This
includes tracing the pathway of the storm sewer to the discharge point, if the storm sewer is the only
viable means of discharge.
b) Number of discharge points (ditches, pipes, channels, etc. that convey wastewater from the
property): Two
c) What type of wastewater is discharged? Indicate which discharge points, if more than one.
8 Non -contact cooling water Discharge point(s) M 001
❑ Boiler Blowdown Discharge point(s) M
❑ Cooling Tower Blowdown Discharge point(s) M
❑ Condensate Discharge point(s) #:
B Other Discharge point(s) #: 002
(Please describe "Other") Sump
d) Volume of discharge per each discharge point (in GPD):
#1: '•'sz.000(ff=aom) #2: 72,000 #3: #4
e) Please describe the type of process (i.e., compressor, A/C unit, chiller, boiler, etc.) the wastewater is
being discharged from, per each separate discharge point (if applicable, use separate sheet):
Hydroelectric generator
8) Please check the type of chemical added to the wastewater for treatment, per each separate discharge
point (if applicable, use separate sheet):
❑ Biocides Name:
Manuf.:
❑ Corrosion inhibitors Name:
Manuf.:
❑ Chlorine Name:
Manuf.:
❑ Algaecide Name:
Manuf.:
❑ Other Name:
Manuf.:
B None
9) If any box in item (8) above, other than none, was checked, a completed Biocide 101 Form and
manufacturers' information on the additive is required to be submitted with the application for the
Division's review.
10) Is there any type of treatment being provided to the wastewater before discharge (i.e., retention ponds,
settling ponds, etc.)? ❑ Yes 8 No
If yes, please include design specifics (i.e., design volume, retention time, surface area, etc.) with
submittal package. Existing treatment facilities should be described in detail. Design criteria and
operational data (including calculations) should be provided to ensure that the facility can comply with the
requirements of the General Permit.. The treatment shall be sufficient to meet the limits set by the
general permits.
Note: Construction of any wastewater treatment facilities requires submission of three (3) sets
of plans and specifications along with the application. Design of treatment facilities
must comply with the requirements of 15A NCAC 2H .0138. If construction applies to
this discharge, include the three sets of plans and specifications with this application.
Page 2 of 4
04/05

NCG500000 N.O.I.
11) Discharge Frequency:
a) The discharge is: B Continuous ❑ Intermittent
b)
c)
i) If the discharge is intermittent, describe when the discharge will occur:
❑ Seasonal❑
ii) If seasonal check the month(s) the discharge occurs: ❑ Jan. ❑ Feb. ❑ Mar. ❑ Apr.
❑ May ❑ Jun. ❑ Jul. ❑ Aug. ❑ Sept. ❑ Oct. ❑ Nov. ❑ Dec.
How many days per week is there a discharge? Seven
Please check the days discharge occurs:
B Sat. 8 Sun. B Mon. B Tue. B Wed.
12) Pollutants:
B Thu. B Fri.
Please list any known pollutants that are present in the discharge, per each separate discharge point (if
applicable, use separate sheet):
13) Receiving waters:
a)
What is the name of the body or bodies of water (creek, stream, river, lake, etc.) that the facility
wastewater discharges end up in? If the site wastewater discharges to a separate storm sewer
system (4S), name the operator of the 4S (e.g. City of Raleigh). Nantahala River
b) Stream Classification: TR,C
14) Alternatives to Direct Discharge:
Address the feasibility of implementing each of the following non -discharge alternatives
a) Connection to a Municipal or Regional Sewer Collection System Not Available
b) Subsurface disposal (including nitrification field, infiltration gallery, injection wells, etc.) Too much flow
c) Spray irrigation Not justifiable, no significant thermal gradient or pollutant load
The alternatives to discharge analysis should include boring logs and/or other information indicating that
a subsurface system is neither feasible nor practical as well as written confirmation indicating that
connection to a POTW is not an option. It should also include a present value of costs analysis as
outlined in the Division's "Guidance For the Evaluation of Wastewater Disposal Alternatives".
16) Additional Application Requirements:
For new or proposed discharges, the following information must be included in triplicate with this
application or it will be returned as incomplete.
a) 7.5 minute series USGS topographic map (or a photocopied portion thereof) with discharge location
clearly indicated.
b) Site map, if the discharge is not directly to a stream, the pathway to the receiving stream must be
clearly indicated. This includes tracing the pathway of a storm sewer to its discharge point.
c) If this application is being submitted by a consulting engineer (or engineering firm), include
documentation from the applicant showing that the engineer (Or firm) submitting the application has
been designated an authorized Representative of the applicant.
d) Final plans for the treatment system (if applicable). The plans must be signed and sealed by a North
Carolina registered Professional Engineer and stamped -"Final Design -Not released for construction".
Page 3 of 4
04/05

NCGS00000 N.O.I.
e) Final specifications for all major treatment components (if applicable). The specifications must be
signed and sealed by a North Carolina registered Professional Engineer and shall include a narrative
description of the treatment system to be constructed.
certify that I am familiar with the information contained in this application and that to the best of my
knowledge and belief such information is true, complete, and accurate.
Printed Name of Person Signing: Carol S.Goolsby
Title: Vice President, Hydro Fleet
(Signature of
North Carolina General Statute 143-216.6 b (1) provides that:
(Dad Signed)
Any person who knowingly makes any false statement, representation, or certification in any
application, record, report, plan or other document filed or required to be maintained under Article 21
or regulations of the Environmental Management Commission implementing that Article, or who
falsifies, tampers with or knowingly renders inaccurate any recording or monitoring device or method
required to be operated or maintained under Article 21 or regulations of the Environmental
Management Commission implementing that Article, shall be guilty of a misdemeanor punishable by
a fine not to exceed $25,000, or by imprisonment not to exceed six months, or by both. (18 U.S.C.
Section 1001 provides a punishment by a fine of not more than $25,000 or imprisonment not more
than 5 years, or both, for a similar offense.)
Notice of Intent must be accompanied by a check or money order for $100.00 made payable to:
NCDENR
Mail three (3) copies of the entire package to:
NPDES Permits Unit
Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Final Checklist
This application will be returned as incomplete unless all of the following items have been
included:
B Check for $100 made payable to NCDENR
B 3 copies of county map or USGS quad sheet with location of facility clearly marked on map
B 3 copies of this completed application and all supporting documents
❑ 3 sets of plans and specifications signed and sealed by a North Carolina P.E.
8 Thorough responses to items 1-7 on this application
B Alternatives analysis including present value of costs for all alternatives
Note
The submission of this document does not guarantee the issuance of an NPDES permit
Page 4 of 4 04/05

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CERTIFIED MAIL — RETURN RECEIPT REQUESTED
January 29, 2008
Mr. David Matthews II
North Carolina Department of Environmental
Health and Natural Resources
Division of Water Quality
Point Source Branch
1617 Mail Service Center
Raleigh, NC 27669-1617
BARRY E. PULSKAMP
Senior Vice President
Regulated Fleet Operations
Duke Energy Corporation
139 East Fourth Street
EM402
Cincinnati, OH 45202
513 287 3485
[e-mail]
17
;I FE
B - 5 2008
�rFI1F, - YInrF.R QUAL P. s
WI ' C`i.'triln�
Re: Delegation of Authority - Signatures on Reports and Requested Information
Duke Energy NPDES Permitted Stations
North Carolina Hydroelectric Facilities
Dear Mr. Matthews:
Part II of B.6.b of the NPDES permits and Federal Regulation 40 CFR 122.22 specify that all
reports required by NPDES permits and other information requested by the permit issuing authority
shall be signed by a responsible corporate officer or a manager of the facility who is authorized to
make management decisions governing the operation of the facility. I hereby authorize the
Manager or General Manager, Hydro Fleet (currently Carol S. Goolsby), and her successors, the
authority to sign all reports and requested information related to the permits or permit applications
for the North Carolina hydroelectric facilities specified below: /
Bear Creek, rig-0w.2e( BrysoiN Cef �s6liff Cowans Ford, Lookout Shoals, Mission, fib
/+Socy3/ E Mountain Island, Nantahala, Oxford, Rho hiss, Tenn ssee Creek, Thorpe, Tuckasegee,
Tuxedo
NC6trw/!� a6Soo//q N� ERIV 7
If there are questions or additional information is needed, please contact Allen Stowe at
(704)3824309.
Sincerely,
/W,(W-
Barry E. Pulskamp
Senior Vice President
Regulated Fleet Operations
www.duke-energy.com

�r
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Michael F. Easley, Governor William G. Ross, Jr., Secretary
Coleen H. Sullins, Director
July 23, 2007
Jimmie Allen Stowe, Jr.
Duke Energy Corporation
526 South Church Street / EC 13K
Charlotte, NC 28202
Subject: Renewal of coverage / General Permit NCG500000
Nantahala Hydroelectric Station
Certificate of Coverage NCG500136
Macon County
Dear Permittee:
In accordance with your renewal application [received on January 31, 2007], the Division is renewing
Certificate of Coverage (CoC) NCG500136 to discharge under NCG500000. This CoC is issued pursuant to the
requirements of North Carolina General Statue 143-215.1 and the Memorandum of Agreement between North
Carolina and the US Environmental Protection agency dated May 9, 1994 [or as subsequently amended].
If any parts, measurement frequencies or sampling requirements contained in this General Permit are
unacceptable to you, you have the right to request an individual permit by submitting an individual permit
application. Unless such demand is made, the certificate of coverage shall be final and binding.
Please take notice that this Certificate of Coverage is not transferable except after notice to the
Division. The Division may require modification or revocation and reissuance of the certificate of coverage.
Contact the Asheville Regional Office prior to any sale or transfer of the Permitted facility.
Regional Office staff will assist you in documenting the transfer of this CoC.
This permit does not affect the legal requirements to obtain other permits which may be required by
the Division of Water Quality or permits required by the Division of Land Resources, Coastal Area
Management Act or any other Federal or Local governmental permit that may be required.
If you have any questions concerning the requirements of the General Permit, please contact Jim
McKay (919 733-5083, extension 595 or [e-mail].
Sincerely,
-76 4�
for Coleen H. Sullins
cc: Central Files
Asheville Regional Office / Surface Water Protection
NPDES file
1617 Mail Service Center, Raleigh, North Carolina 27699.1617 One
512 North Salisbury Street, Raleigh, North Carolina 27604 NorthCarolina
Phone: [phone] / FAX [phone] / Intemet: www.ncwaterquality.org ^
An Equal Opportunity/Affirmative Action Employer -50%Recycled/10%fi/�/a��N911YPostConsumerPaper L

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
GENERAL PERMIT NCG500000
CERTIFICATE OF COVERAGE NCG500136
TO DISCHARGE NON -CONTACT COOLING WATER, COOLING TOWER AND BOILER
BLOWDOWN, CONDENSATE AND SIMILAR WASTEWATERS UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards and
regulations promulgated and adopted by the North Carolina Environmental Management Commission, and
the Federal Water Pollution Control Act, as amended,
Duke Energy Corporation
is hereby authorized to discharge from a facility located at
Nantahala Hydroelectric Station
27868 Wayah Road
Franklin
Macon County
to receiving waters designated as the Nantahala River in subbasin 40403 of the Little
Tennessee River Basin in accordance with the effluent limitations, monitoring
requirements, and other conditions set forth in Parts I, II, III and IV hereof.
This certificate of coverage shall become effective August 1, 2007.
This Certificate of Coverage shall remain in effect for the duration of the General Permit.
Signed this day July 23, 2007.
/.�' -)6 � �'-
for Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission

a
a
i
W
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Alan W. Klimek, P.E., Director
NOTICE OF RENEWAL INTENT
Application for renewal of existing coverage under General Permit NCG500000
Existing Certificate of Coverage (CoC): NCG500136
(Please print or type)
1) Mailing address" of facility owner/operator:
Company Name Duke Energy Carolinas, LLC
Owner Name Allen Stowe, Scientist - Water Management
Street Address 526 South Church Street, EC 13K
City Charlotte StateNC ZIP Code 28202
Telephone Number(704) 382-4309 Fax: [phone]
Email address [e-mail]
* Address to which all permit correspondence should be mailed
2) Location of facility producing discharge:
Facility Name Nantahala Hydroelectric Station
Facility Contact John Reighard
Street Address 27868 Wavah Road
City Franklin StateNC ZIP Code 28734
County Macon
Telephone Number(828) 321-4551 Fax: NLA
Email address jireigha(?aduke-energy
3) Description of Discharge:
i
a) Is the discharge directly to the receiving stream? ® Yes 0 No
(If no, submit a site map with the pathway to the potential receiving waters clearly marked. This includes tracing the pathway of the
storm sewer to the discharge point, if the storm sewer is the only viable means of discharge.)
b) Number of discharge outfalls (ditches, pipes, channels, etc. that convey wastewater from the
property): Two
c) What type of wastewater is discharged? Indicate which discharge points, if more than one.
® Non -contact cooling water Outfall(s) #: 001
0 Boiler Blowdown Outfall (s) #:
Page 1 of 3

NCG500000 renewal application
❑ Cooling Tower Blowdown Outfall (s) #:
O Condensate Outfall (s) #:
® Other Outfall (s) #: 002
(Please describe "Other") SumD
d) Volume of discharge per each discharge point (in GPD):
#001: ] 152,000 (max. flow) #002: 72,000 #003: #004
4) Please check the type of chemical [s] added to the wastewater for treatment, per each separate discharge
point (if applicable, use separate sheet):
❑ Chlorine O Biocides O Corrosion inhibitors ❑ Algaecide O Other
® None
5) If any box in item (4) above [other than None] was checked, a completed Biocide 101 Form and
manufacturers' information on the additive must be submitted to the following address for approval:
NC DENR / DWQ / Environmental Sciences Section
Aquatic Toxicology Unit
1621 Mail Service Center
Raleigh, NC 27699-1621
6) Is there any type of treatment being provided to the wastewater before discharge (i.e., retention ponds,
settling ponds, etc.)? ❑ Yes ® No
(If yes, please include design specifics (i.e., design volume, retention time, surface area, etc.) with submittal package. Existing
treatment facilities should be described in detail. )
7) Discharge Frequency:
a) The discharge is: IN Continuous ❑Intermittent O Seasonal*
i) If the discharge is intermittent, describe when the discharge will occur:
ii) *Check the month(s) the discharge occurs: O Jan O Feb ❑ Mar. ❑ Apr O May O Jun O Jul O
Aug. ❑ Sept. ❑ Oct. ❑ Nov. ❑ Dec.
b) How many days per week is there a discharge? Seven
c) Please check the days discharge occurs: ® Sat. ® Sun. ® Mon. ® Tue. ® Wed. ® Thu. ® Fri.
8) Receiving stream[s]:
a) To what body or bodies of water (creek, stream, river, lake, etc.) does the facility discharge wastewater?
If the site discharges wastewater to a separate storm sewer system (4S), name the operator of the 4S
(e.g. City of Raleigh). Nantahala River
b) Stream Classification: TR,C
Additional Application Requirements:
Page 2of3

NCG500000 renewal application
Additional Application Requirements:
The following information must be included in triplicate [original + 2 copies) with this application or
it will be returned as incomplete.
➢ Site map. If the discharge is not directly to a stream, the pathway to the receiving stream
must be clearly indicated. This includes tracing the pathway of a storm sewer to its
discharge point.
➢ Authorization for representatives. If this application will be submitted by a consulting
engineer (or engineering firm), include documentation from the Permittee showing that the
consultant submitting the application has been designated an Authorized Representative of
the applicant.
Certification
I certify that I am familiar with the information contained in this application and that to the best of
my knowledge and belief such information is true, complete, and accurate.
Printed Name of Person Signing: Carol S. Goolsby
Title: General Manager, Hydro Fleet
(Signature
North Carolina General Statute 143-215.6 b (1) provides that:
1 29 07
(Date Signed)
Any person who knowingly makes any false statement, representation, or certification in any application, record, report, plan or other document
filed or required to be maintained under Article 21 or regulations of the Environmental Management Commission implementing that Article, or who
falsifies, tampers with or knowingly renders inaccurate any recording or monitoring device or method required to be operated or maintained under
Article 21 or regulations of the Environmental Management Commission implementing that Article, shall be guilty of a misdemeanor punishable by
a fine not to exceed $25,000, or by imprisonment not to exceed six months, or by both. (18 U.S.C. Section 1001 provides a punishment by a fine
of not more than $25,000 or imprisonment not more than 5 years, or both, for a similar offense.)
aEaeacmasaEasasasaEaEa
This Notice of Renewal Intent does NOT require a separate fee.
The permitted fadiit.y already pays an annual fee for coverage under NCG500000.
Mail the original and two copies of the entire package to:
Mr. Charles H. Weaver
NC DENR / DWQ / NPDES
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Page 3 of 3

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State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross Jr., Secretary
Alan W. Klimek, P.E. Director
July 26, 2002
THOMAS D SMITHERMAN
NANTAHALA HYDROELECTRIC PLANT
301 NP&L LOOP RD
FRANKLIN, NC 28734
A LTWA
1••
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: Reissue - NPDES Wastewater Discharge Permit
Nantahala Hydroelectric Plant
COC Number NCG500136
Macon County
Dear Permittee:
In response to your renewal application for continued coverage under general permit NCG500000, the Division of
Water Quality (DWQ) is forwarding herewith the reissued wastewater general permit Certificate of Coverage
(COC). This COC is reissued pursuant to the requirements of North Carolina General Statute 143-215.1 and the
Memorandum of Agreement between the state of North Carolina and the U.S. Environmental Protection Agency,
dated May 9, 1994 (or as subsquently amended).
The following information is included with your permit package:
* A copy of the Certificate of Coverage for your treatment facility
* A copy of General Wastewater Discharge Permit NCG500000
* A copy of a Technical Bulletin for General Wastewater Discharge Permit NCG500000
Your coverage under this general permit is not transferable except after notice to DWQ. The Division may require
modification or revocation and reissuance of the Certificate of Coverage. This permit does not affect the legal
requirements to obtain other permits which may be required by DENR or relieve the permittee from responsibility
for compliance with any other applicable federal, state, or local law rule, standard, ordinance, order, judgment, or
decree.
If you have any questions regarding this permit package please contact Aisha Lau of the Central Office Stormwater
and General Permits Unit at [phone], ext. 578
Sincerely,
for Alan W. Klimek, P.E.
cc: Central Files
Stormwater & General Permits Unit Files
Asheville Regional Office
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

9
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
GENERAL PERMIT NO. NCG500000
CERTIFICATE OF COVERAGE No. NCG500136
TO DISCHARGE NON -CONTACT COOLING WATER, COOLING TOWER AND BOILER
BLOWDOWN, CONDENSATE AND SIMILAR WASTEWATERS UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards and
regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the
Federal Water Pollution Control Act, as amended,
DUKE ENERGY CORPORATION
is hereby authorized to discharge
NON -CONTACT COOLING WATER / CONDENSATE
water or similar wastewater from a facility located at
NANTAHALA HYDROELECTRIC PLANT
27868 WAYAH RD
FRANKLIN
MACON COUNTY
to receiving waters designated as the Nantahala River, a class B TR water, in the Little Tennessee River Basin in
accordance with the effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III,
and IV of General Permit No. NCG500000 as attached.
This certificate of coverage shall become effective August 1, 2002.
This Certificate of Coverage shall remain in effect for the duration of the General Permit.
Signed this day July 26, 2002.
for Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

Duke
Power.
A Du,&i Comp,
May 31, 2001
NCDENR-Division of Water Quality
1617 Mail Service Center
Raleigh, N. C. 27699-1617
Duke Power
Pumped Storage Area
Bad Creek and lomsee
P.O. Box 478
Salem, SC 29676
[phone]
Please change the mailing addresses for the following Annual Permit Fees that have
previously been sent to Nantahala Power & Light:
Permit Number:
NCG500136
Nantahala Hydro
NCG500123
Tennessee Creek Hydro
NCG500124
Bear Creek Hydro
NCG500125
Cedar Creek Hydro
NCG500126
Tuckasegee Hydro
NCG500127
Thorpe Hydro
NCG500128
Mission Hydro
NCG500129
Bryson City Hydro
Please mail to: Duke Power Company
Nantahala Hydro Plants
P.O. Box 478
Salem, S. C. 29676
Thank you,
RIM i I �_..
Sandra H. Smith
Adm. Specialist
Pumped Storage/Nantahala Area

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Jonathan Howes, Secretary
A. Preston Howard, Jr., P.E., Director
Thomas D. Smitherman
Nantahala Power & Light Company
301 NP&L Loop Road
Franklin , NC 28734
Dear Permittee:
AIa
1:3EHNR
July 24,1997
Subject: Certificate of Coverage No. NCG500136
Renewal of General Permit
Nantahala Hydro Station
Macon County
In accordance with your application for renewal of the subject Certificate of Coverage, the Division is forwarding
the enclosed General Permit. This renewal is valid until July 31, 2002. This permit is issued pursuant to the
requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between North
Carolina and the U.S. Environmental Protection Agency dated December 6,1983. If any parts, measurement
frequencies or sampling requirements contained in this permit are unacceptable to you, you have the right to request
an individual permit by submitting an individual permit application. Unless such demand is made, this certificate
of coverage shall be final and binding.
The Certificate of Coverage for your facility is not transferable except after notice to the Division. Use the enclosed
Permit Name/Ownership Change form to notify the Division if you sell or otherwise transfer ownership of the
subject facility. The Division may require modification or revocation and reissuance of the Certificate of Coverage.
If your facility ceases discharge of wastewater before the expiration date of this permit, contact the Regional
Office listed below at [phone]. Once discharge from your facility has ceased, this permit may be rescinded.
This permit does not affect the legal requirements to obtain other permits which may be required by the Division of
Water Quality, the Division of Land Resources, Coastal Area Management Act or any other Federal or Local
governmental permit that may be required.
If you have any questions concerning this permit, please contact the NPDES Group at the address below.
Sincerely,
�"✓ A. Preston Howard, Jr., P.E.
cc: Central Files 6
Asheville Regional Office
NPDES File
Facility Assessment Unit
P.O. Box 29535, Raleigh, North Carolina 27626-0535 [phone] FAX [phone] p&[e-mail]
An Equal Opportunity Affirmative Action Employer 50% recycled / 10% post -consumer paper

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
GENERAL PERMIT NO. NCG500000
CERTIFICATE OF COVERAGE NO. NCG500136
TO DISCHARGE NON -CONTACT COOLING WATER, COOLING TOWER AND BOILER
BLOWDOWN, CONDENSATE, EXEMPT STORMWATER, COOLING WATERS ASSOCIATED WITH
HYDROELECTRIC OPERATIONS, AND SIMILIAR WASTEWATERS UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Control Act, as amended,
Nantahala Power & Light Company
is hereby authorized to discharge
cooling water and other waters associated with hydroelectric operations
from a facility located at
Nantahala Hydro Station
27868 Wayah Road
Franklin
Macon County
to receiving waters designated as subbasin 40401 in the Little Tennessee River Basin
in accordance with the effluent limitations, monitoring requirements, and other conditions set forth
in Parts I, II, III and IV of General Permit No. NCG500000 as attached.
This certificate of coverage shall become effective August 1, 1997.
This certificate of coverage shall remain in effect for the duration of the General Permit.
Signed this day July 24,1997.
A. Preston Howard, Jr., P.E., Director
f-fo'�Division of Water Quality
By Authority of the Environmental Management Commission

Letter to N.E. TUCKER, JR
NCG500136
January 28, 1997
INVOICE FOR RENEWAL OF
NPDES PERMIT
Check here if you do NOT wish to renew this permit.
Please return this page along with a letter documenting your reasons
for not requesting renewal to:
Mr. Charles H. Weaver, Jr.
Division of Water Quality/WQ Section
NPDES Group
Post Office Box 29535
Raleigh, North Carolina 27626-0535
❑x Check here if you wish to renew this permit.
Please verify that the following information is documented accurately:
Mailing_ Address
N.E. TUCKER, JR
NANTAHALA P&L/NANTAHALA
HYDRO
STAR ROUTE
TOPTON , NC 28781
[phone]
Fax number: [phone]
e-mail address:
Facility Location
N.E. TUCKER, JR
NANTAHALA P&L/NANTAHALA
HYDRO
SR 1310
❑ No revision required.
® Revision required. (Please specify below.)
THOMAS D. SMITHERMAN
NANTAHALA POWER & LIGHT COMPANY
301 NP&L LOOP RD, - FRANKLIN. NC 28734
[phone]
No revision required.
FXJ Revision required. (Please specify below.)
NP&L/NANTAHALA HYDRO
27868 WA AH ROAD
OFF US HIGHWAY 19/74
Please return this page with your letter requesting renewal, and $400 fee (payable to NCDEHNR) to:
Mr. Charles H. Weaver, Jr.
Division of Water Quality/WQ Section
NPDES Group
Post Office Box 29535
Raleigh, North Carolina 27626-0535
Signature of applicant or authorized representative /
Date 92 - 2 o- 9-7

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
N. E. Tucker, Jr.
Star Route
Topton, NC 28781
Dear Mr. Tucker.
/\ * �'
.w
ED FE F11'
July 30, 1993
Subject: General Permit No. NCG500000
Nantahala Hydroelectric Plant
COC NCG500136
Macon County
In accordance with your application for discharge permit received on June 24, 1993, we are forwarding
herewith the subject certificate of coverage to discharge under the subject state - NPDES general permit. This
permit is issued pursuant to the requirements of North Carolina General Statute 143-215 .1 and the
Memorandum of Agreement between North Carolina and the US Environmental Protection agency dated
December 6, 1983.
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to request an individual permit by submitting an individual permit
application. Unless such demand is made, this certificate of coverage shall be final and binding.
Please take notice that this certificate of coverage is not transferable except after notice to the Division
of Environmental Management. The Divsion of Environmental Management may require modification or
revocation and reissuance of the certificate of coverage.
This permit does not affect the legal requirements to obtain other permits which may be required by the
Division of Environmental Management or permits required by the Division of Land Resources, Coastal Area
Management Act or any other Federal or Local governmental permit that may be required.
If you have any questions concerning this permit, please contact W. Randy Kepler at telephone number
9191733-5083.
cc:
Sincerely,
Original Signed By
Coleen H. Sullins
A. Preston Howard, Jr., P. E.
Asheville Regional Office
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES
DIVISION OF ENVIRONMENTAL MANAGEMENT
TO DISCHARGE NON -CONTACT COOLING WATER, COOLING TOWER AND BOILER BLOWDOWN,
CONDENSATE AND SIMILAR WASTEWATERS UNDER THE
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards and
regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the
Federal Water Pollution Control Act, as amended,
Nantahala Power and Light Company
is hereby authorized to continue operation of a treatment system for the generation of non -contact cooling waters,
boiler water blowdown or similar waste streams with the discharge of treated wastewater from a facility located at
Nantahala Hydroelectric Plant
on NCSR 1310
Macon County
to receiving waters designated as the Nantahala River in Little Tennessee River Basin
in accordance with the effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III
and IV of General Permit No. NCG500000 as attached.
This certificate of coverage shall become effective August 1,1993
This Certificate of Coverage shall remain in effect for the duration of the General Permit.
Signed this day July 30,1993
Original Signed By
Coleen H. Sullins
A. Preston Howard, Jr., P.E.,Director
Division of Environmental Management
By Authority of the Environmental Management Commission

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:r
SOC PRIORITY PROJECT:
IF YES, SOC NUMBER
TO: PERMITS AND ENGINEERING UNIT
WATER QUALITY SECTION
ATTENTION: Randy Kepler
DATE: July 22, 1.993
No
X
•
i
rjUi 2 b ,,
iECIiPV:' ruij BRANCH
NPDES STAFF REPORT AND RECOMMENDATION
COUNTY Macon Q 4- D 4- 03
PERMIT NUMBER NCG 500136
PART I - GENFRAL INFORMATION
1. Facility and Address: Nantahala Hydroelectric Station
Nantahala Power and Light Co.
Star Route
Topto, N. C. 28781
2. Date of Investigation: July 21, 1993
3. Report Prepared By: W. E. Anderson
4. Persons Contacted and Telephone Number.: Noah Johnson, Jr.
704-321-5633
5. Directions to Site: From the intersection of US 19 and NCSR 1310,
travel east on NCSR 1310 about 0.3 mile to the hydroelectric
station.
6. Discharge Point(s), List for all discharge points:
Latitude: 350 16' 19 Longitude: 830 40' 34"
Attach a USGS map extract and indicate treatment facility site and
discharge point on map.
U.S.G.S. Quad No. Hewitt U.S.G.S. Quad Name 158-SW(F4SW)
7. Site size and expansion area consistent with application? N/A
Yes No If No, explain:
Page PLOTTED

8.
9.
10
Topography (relationship to flood plain included):
the flood plain -this is a hydro power generator.
Location of nearest dwelling: Greater than 500 feet.
Steep, in
Receiving stream or affected surface waters: Nantahala River
a. Classification: B-Trout ©3
b. River Basin and Subbasin No.: I.ittle Tennessee 0404D'Y
C. Describe receiving stream features and pertinent downstream
uses: The Nantahala River r.•afti.ng industry depends upon the
discharge from this power plan+ -
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted N/A MGD (Ultimate
Design Capacity)
b. What is the current permitted capacity of the Wastewater
Treatment facility? N/A
C. Actual treatment capacity of the current facility (current
design capacity N/A
d. Date(s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two years:
N/A
e. Please provide a description of existing or substantially
constructed wastewater treatment facilities: N/A
f. Please provide a description of proposed wastewater treatment
facilities: N/A
g. Possible toxic impacts to surface waters: N/A
h. Pretreatment Program (POTWs only): N/A
in development approved
should be required not needed
2. Residuals handling and utilization/disposal scheme: N/A
a. If residuals are being land applied, please specify DEM
Permit Number
Residuals Contractor
Telephone Number
b. Residuals stabilization: PSRP PFRP OTHER
Page 2

c. Landfill:
d. Other disposal/utilization scheme (Specify):
3. Treatment plant classification (attach completed rating sheet):
4. SIC Codes(s): 4911
Wastewater Code(s) of actual wastewater, not particular facilities
i.e., non -contact cooling water discharge from a metal plating
company would be 14, not 56.
Primary 14 Secondary
Main Treatment Unit Code: 000-0
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds
or are any public monies involved. (municipals only)? N/A
2. Special monitoring or limitations (including toxicity) requests:
None.
3. Important SOC, JOC, or Compliance Schedule dates: (Please
indicate) N/A
Date
Submission of Plans and Specifications
Begin Construction
Complete Construction
4. Alternative Analysis Evaluation: Has the facility evaluated all
of the non -discharge options available. Please provide regional
perspective for each option evaluated.
Spray Irrigation: N/A
Connection to Regional Sewer System: N/A
Subsurface: N/A
Other disposal options: N/A
5. Other Special Items: None.
P age 3

PART IV - EVALUATION AND RECOMMENDATIONS
This is a discharge of cooling water associated with a
hydroelectric power generator. The cooling is intrinsic to the
turbine/generator combination and r.annot be separated from the
flow through the turbine.
Issuance of the Certificate of Cover. acle is recommended.
Signature of Report P epare
i
W er. Q ality Regional Supervisor
Da
Page 4

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