NCG500110_complete file-historical_20160119

Watet'Resoi4rces
LNVIRONM�NTAL OVALITY
January 19, 2016
Mr. Steve Cahoon
Duke Energy Carolinas, LLC
410 S Wilmington St
Raleigh, NC 27601
PAT MCCRORY
DONALD R. VAN DER VAART
S. JAY ZIMMERMAN
Subject: Renewal of General Permit NCG500000
Tuxedo Hydroelectric Station
Certificate of Coverage NCG500110
Henderson County
Dear Permittee:
The Division has renewed the subject General Permit. We appreciate your patience during the
longer -than -expected renewal period. The Division hereby issues the updated version of Certificate of
Coverage (CoC) NCG500110 under General Permit NCG500000. It 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 any other State, Federal, or Local
governmental permit that may be required. If you have any questions concerning the requirements of the
General Permit, please contact Charles Weaver of the NPDES staff [919 807-6391 or
charle s. w e ave r@ncdenr. gov] .
cc: Asheville Regional Office
NPDES file
Sin rely, t
for S. Jay Zimmerman, Director
Division of Water Resources
State of North Carolina I Environmental Quality I Water Resources
1617 Mail Service Center I Raleigh, NC 27699-1617
919 807 6300 919-807-6389 FAX
http,.//portal.ncdenr.org/xvehfwq

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
GENERAL PERMIT NCG500000
CERTIFICATE OF COVERAGE NCG500110
DISCHARGE OF NON -CONTACT COOLING WATER, COOLING TOWER AND BOILER
BLOWDOWN, CONDENSATE, EXEMPT STORMWATER, COOLING WATERS ASSOCIATED
WITH HYDROELECTRIC OPERATIONS, 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 Carolinas, LLC
is hereby authorized to discharge from a facility located at the
Tuxedo Hydroelectric Station
Pot Shoals Rd
Flat Rock
Henderson County
to receiving waters designated as the South Prong Green River, a class C-Trout stream in
subbasin 03-08-03 of the Broad 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 takes effect January 19, 2016.
This Certificate of Coverage shall remain valid for the duration of the General Permit.
Signed this day January 19, 2016
Z"
G
for ay Zimmerman, Director
Division of Water Resources
By Authority of the Environmental Management Commission

�r
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Resources
Pat McCrory Thomas A. Reeder John E. Skvarla, III
Governor Director Secretary
NOTICE OF RENEWAL INTENT
[Required by 15A NCAC 02H .0127(d)l; [term definition see 15A NCAC 02H .0103(19)l
Application for renewal of existing coverage under General Permit NCG500000
Existing Certificate of Coverage (CoQ: NCG500110
(Press Tab to navigate form)
1) Mailing address of facility owner/operator: (address to which all correspondence should be mailed)
Company Name Duke Energy Carolinas, LLC
Owner Name Steve Cahoon
Street Address 410 S. Wilmington St.
City Raleigh State NC
Telephone # 919 - 546 - 7457 Fax # 919 - 546 - 4409
Email Address [e-mail]
2) Location of facility producing discharge:
Facility Name Tuxedo Hydroelectric Station
Facility Contact
Nob Zalme
Street Address
Rt. 1 Box 104A, Pot Shoals Road
City
Flat Rock State NC
County
Henderson
Telephone #
336 - 462 - 0221 Fax #
Email Address
[e-mail]
3) Description of Discharge:
ZIP Code 27601 -
RFCEIVEDIDENRIDWR
JAN 3 0 2015
Water Qua%
Permitting Section
ZIP Code 28731-
a) Is the discharge directly to the receiving stream?
® Yes
❑ No — Please 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
Pagel of3

NCG500000 Renewal Application
c) What type of wastewater is discharged? Indicate which discharge points, if more than one.
® Non -contact cooling water Outfall (s) #: 001, 002
❑ Boiler Blowdown Outfall (s) #:
❑ Cooling Tower Blowdown Outfall (s) #:
❑ Condensate Outfall (s) #:
❑ Other Outfall (s) #:
(Please describe "Other"):
d) Volume of discharge per each discharge point (in GPD):
#001: 21,600 GPD #002: 21,600 GPD #003: GPD #004: GPD
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 ❑ Biocides ❑ Corrosion inhibitors ❑ Algaecide ❑ Other ® None
If as box other than None is checked, a completed Biocide 101 Form and manufacturers' information on the
additive must be submitted to the following address for approval:
NC DENR / DWR / Environmental Sciences Section
Aquatic Toxicology Unit
1621 Mail Service Center
Raleigh, NC 27699-1621
5) Is there any type of treatment being provided to the wastewater before discharge? (i.e., retention ponds,
settling ponds, etc.)
❑ 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.
® No
6) Discharge Frequency:
a) The discharge is: ® Continuous ❑ Intermittent ❑ Seasonal
i) If the discharge is intermittent, describe when the discharge will occur:
ii) If seasonal, check the month(s) the discharge occurs:
❑ Jan ❑ Feb ❑ Mar. [:]Apr ❑ May ❑ Jun ❑ Jul ❑ 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.
Page 2 of 3

NCG500000 Renewal Application
Additional Application Requirements:
The following information must be included in duplicate [original + 1 copy] 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, per 15A NCAC 02H .0138(b)(1).
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: Randy C. Herrin Title: GM III Regional Fleet
(Please review 15A NCAC 02H .0106(e) for authorized signing officials)
/ i6F 3
Click ere to enter a date.
Signature of Apphant Date Signed
North Carolina General Statute § 143-215.6B provides that:
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 this Article or a rule implementing this
Article; or who knowingly makes a false statement of a material fact in a rulemaking proceeding or contested case
under this Article; or who falsifies, tampers with, or knowingly renders inaccurate any recording or monitoring device
or method required to be operated or maintained under this Article or rules of the Commission implementing this
Article, shall be guilty of a Class 2 misdemeanor which may include a fine not to exceed ten thousand dollars
($10,000). 18 U.S.C. Section 1001 provides a punishment by a fine or imprisonment not more than 5 years, or both,
for a similar offense.
This Notice of Renewal Intent does NOT require a separate fee.
The permitted facility already pays an annual fee for coverage under NCG500000.
Mail the original and one copy of the entire package to:
NC DENR / DWR / Water Permitting Section
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Attn: Charles Weaver
Page 3 of 3

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A
NCDENR
North Carolina Department of Environment and Natural Resources
Beverly Eaves Perdue
Governor
Mr. Allen Stowe, Jr.
Duke Energy Corporation
526 South Church Street / EC 13K
Charlotte, NC 28202
Dear Permittee:
Division of Water Quality
Charles Wakild, P.E.
Director
August 3, 2012
Dee Freeman
Secretary
Subject: Renewal of coverage / General Permit NCG500000
Tuxedo Hydroelectric Station
Certificate of Coverage NCG500110
Henderson County
The Division is renewing Certificate of Coverage (CoC) NCG500110 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 Reaional 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
NorthCarolina
Naturally

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
GENERAL PERMIT NCG500000
CERTIFICATE OF COVERAGE NCG500110
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
Tuxedo Hydroelectric Station
Pot Shoal Road NCSR 1836
Flat Rock
Henderson County
to receiving waters designated as the Green River in subbasin 03-08-03 of the Broad
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

�60 Ito
FIN%
• Division of Water Quality / Water Quality Section
NCDENR National Pollutant Discharge Elimination System
'4CMM CARCUt" C*VAS"E-4 GW
FN =mmrTa Am Naunr9. Rrywwo
NCG500000
FOR AGENCY USE ONLY
I Check 4 1 Amount I
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 owner/operator:
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 Tuxedo Hydroelectric Station
Facility Contact Randy Horton
Street Address Rt 1 Box 104A, Pot Shoals Road
City Flat Rock State NC ZIP Code 28731
County Henderson
Telephone No. 828 698-2070 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). Take 1-85 S to Hwy 74 W (Shelby Exit). Go to 1-26 W to the Saluda
Exit. At stop sign, turn left on Hwy 176. Turn right and go through Saluda. Cross bridge. At top of hill, turn right, follow road to powerhouse.
(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:
B 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

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) #: 001,002
❑ Boiler Blowdown Discharge point(s) M
❑ Cooling Tower Blowdown Discharge point(s) #:
❑ Condensate Discharge point(s) #:
❑ Other Discharge point(s) #:
(Please describe "Other")
d) Volume of discharge per each discharge point (in GPD):
#1: 21,600 #2: 21,600 #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 B 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: 8 Continuous ❑ Intermittent
b)
c)
i) If the discharge is intermittent, describe when the discharge will occur:
ii) If seasonal check the month(s) the discharge occurs: ❑ Jan.
❑ May ❑ Jun. ❑ Jul. ❑ Aug. ❑ Sept. ❑ Oct. ❑ Nov.
How many days per week is there a discharge? Seven
Please check the days discharge occurs:
B Sat. B Sun. 8 Mon. 8 Tue. B Wed. B Thu. 8 Fri.
12) Pollutants:
❑ Seasonal❑
❑ Feb. ❑ Mar. ❑ Apr.
❑ Dec.
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). Green 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".
15) 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

NCG500000 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.
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: Vice President, Hydro Fleet
(Signature of
North Carolina General Statute 143-215.6 b (1) provides that:
(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.)
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:
8 Check for $100 made payable to NCDENR
8 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
El 3 sets of plans and specifications signed and sealed by a North Carolina P.E.
B 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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/Duke
Energy
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
barry. pul skamp@duke-energy. cam
Re: Delegation of Authority - Signatures on Reports and Requested Information
Duke Energy NPDES Permitted Stations
North Carolina Hydroelectric Facilities
Dear Mr. Matthews:
FEB - 5
2008 W„
rt'NF; . WAiFR OUAIIT.'
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:
NGGroo�ay,,✓✓c .rooiay A1e65cvra9 4S o�7f�v�Lvzcor d��A967/ 0. d*GSCe%75
Bear Creek, Brtgewater, Bryson" Cellar FIdf, dowans Ford, Lookout Shcals, Mission,
/y(l f�3l .E Mountain Island, Nantahala, Oxford, Rho hiss, Tenn ssee Creek, Thorpe, Tuckasegee,
Tuxedo-* b'�c�rw/3� J, Nc6�,�m/o0 ccsa3 f' ;Vea oo//� N�6,SV0/d7
pc
If there are questions or additional inforG mation Soo//fsq
needed, please contact Allen Stowe at
[phone].
Sincerely,
/WUA
Barry E. Pulskamp
Senior Vice President
Regulated Fleet Operations
www.duke-energy.com

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
Tuxedo Hydroelectric Station
Certificate of Coverage NCG500110
Henderson County
Dear Permittee:
In accordance with your renewal application [received on January 31, 20071, the Division is renewing
Certificate of Coverage (CoC) NCG500110 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,
for Coleen H. Sullins
cc: Central Files
Asheville Regional Office / Surface Water Protection
NPDES file
1617 Mail Service Center, Raleigh, Noah Carolina 27699.1617 One
512 Noah Salisbury Street, Raleigh, Noah Carolina 27604 NorthCarohna
Phone: [phone] / FAX [phone] / Internet: www.ncwaterquality.org �atura!!r�
An Equal Opportunity/Affirmative Action Employer —50% Recycled/10% Post Consumer Paper

N
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
GENERAL PERMIT NCG500000
CERTIFICATE OF COVERAGE NCG500110
TO DISCHARGE NON -CONTACT COOLING WATER, COOLING TOWER AND BOILER
BLOWDOWN, CONDENSATE AND SIMILAR WASTEWATERS UNDER THE
NATIONAL POLLUTANT DISCHARGE ELEVHNATION 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
Tuxedo Hydroelectric Station
Pot Shoal Road NCSR 1836
Flat Rock
Henderson County
to receiving waters designated as the Green River in subbasin 30803 of the Broad 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.
/.'� -76 4��
for Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission

WW ATF�
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
Asheville Regional Office
Mr. Allen Stowe
SURFACE WATER PROTECTION
February 13, 2007
Duke Energy Corporation
Mail Code EC13K
Post Box 1006
Charlotte, North Carolina 28201-1006
SUBJECT: Compliance Evaluation Inspection
Tuxedo Hydroelectric Plant
Permit No: NCG500110
Henderson County
Dear Mr. Stowe:
Enclosed please find a copy of the Compliance Evaluation Inspection form from
the inspection conducted on February 9, 2007. 1 conducted the Compliance Evaluation
Inspection. The facility was found to be in Compliance with permit NCG500110.
Please refer to the enclosed inspection report for additional observations and
comments. If you or your staff have any questions, please call me at [phone].
Sincerely,
L rost
E�ivironmental Engineer
Enclosure
cc: Steve Hodges, Duke Energy, 573 Duke Power Road, Mooresboro, NC 28114
NPDES Unit
Central Files
Asheville Files
N,Q�,rthCarolina
2090 U.S. Highway 70, Swannanoa, NC 28778 Telephone: [phone] Fax: [phone] Customer Service 1 877 6216748

United States Environmental Protection Agency
Efp A Washington, D.C. 20460 Form Approved.
OMB No. 2040-0057
Water COm liance inspection Report Approval expires 8-31-98
Section A: National Data System Coding (i.e., PCS)
Transaction Code NPDES yr/mo/day
1 2 3I
Inspection Type
Inspector Fac Type
!J U5 MCG51".1 lio I11 12I n7/C.2"1g 117
18 -I
L_.!
20
191 s I I I
!-! !.._!
21 Remarks
IIIIIIIIIIIsE
Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA
67L 69 70 U 71 U 72 U j �
73 I ' J , 74
' '
Reserved----
75LLI I I I 180
Section B: Facility Data
Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include
POTW name and NPDES permit Number)
Entry Time/Date
Permit Effective Date
Tuxed- , Hyciroelect;,C.tc j ialnt:
1.'':00 PH 07/02" 09
()21 %CI021.
N11"S p ' ``'' 6-
Exit Time/Date
Permit Expiration Date
Flat: Rock .JC 2$731
.1-"30 1%I3 07/02/0:3
071i0'7/31.
Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number s
() Other Facility Data
Name, Address of Responsible Official/Title/Phone and Fax Number
jr A le:: �7�4LtiQ i'Icli1 '~Li!,ifV t;!.i ). V. - I:ll;in L11C':3'•' 'J �'r, Siontacted
GG.�i1}.��:i''.)^f: e11:'i@S
Section C: Areas Evaluated During Inspection (Check only those areas evaluated)
Permit Operations & Maintenance N Records/Reports Self -Monitoring Program
_ Facility Site Review
Section D: Summary of Find
(See attachment summary)
Name(s) and Signature(s) of Inspector(s)
„3 Frost (OO�
Signature of Management Q A Reviewer
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.
additional sheets of narrative and checklists as necessa
Agency/Office/Phone and Fax Numbers
A}'' �J',e;'ly _'G-_96-41500 E t. 4u58i
Agency/Office/Phone and Fax Numbers
Date
L �i
Date
Page # 1

NPDES yr/mo/day Inspection Type (cont.) 1
3I 31.10 I11 12I ; Y � 117 18' _'
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
Duke Energy's Tuxedo Hydroelectric Powerhouse consists of a pinstock to the powerhouse, powerhouse
generation equipment, central powerhouse sump and tailrace. The tailrace discharges to Green River. The
plant has permitted discharges of generator thrust bearing cooling water and powerhouse sump discharges.
Mr. Larry Frost performed the inspection. The facility appeared to be operating properly, one turbine was out
of service. There were no un-permitted discharges noted during the inspection.
The purpose of the permit is to protect the receiving stream; therefore, the inspector recommends that
Upstream, Effluent -and Downstream sampling points be re-evaluated for this facility. The recommended
upstream sampling site is the pinstock (the operator has access in the powerhouse that will serve this
purpose), the effluent site from the tailrace and the bridge downstream of the plant, it is recommended that
these sites be established by written policy.
Once the sampling sites are established, then the monitoring requirements and monitoring frequency for
each site should re-evaluated.
The proper reporting of flow from the powerhouse was discussed, during the inspection, Since monitoring
data is not required to be submitted to the State, the inspectors recommend that Duke Energy use common
units of measure for this type industry (examples discussed were; CFS and MGD, however some other unit
may be more appropriate) with regards to flow. If you should have any questions regarding this issue please
contact one of the inspectors.
Finally, a special word of thanks to Mr. Steve Hodges and Mr. Frank Hill for their assistance during the
inspection.
Page # 2

Permit: NCG500110 Owner - Facility: Tuxedo Hydroelectric Plant
Inspection Date: 02/09/2007 . Inspection Type: Compliance Evaluation
Operations &Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? ■ Q Cl Q
Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable Solids, pH, DO, Sludge 0 ❑ ■ p
Judge, and other that are applicable?
Comment:
Permit
(If the present permit expires in 6 months or less). Has the permittee submitted a new application?
Is the facility as described in the permit?
# Are there any special conditions for the permit?
Is access to the plant site restricted to the general public?
Is the inspector granted access to all areas for inspection?
Comment: Permit renewal application was submitted to DWQ on January 29, 2007.
■000
■000
0Q■Q
■000
■000
Page # 3

v
f • ' v
A•
A0�A
-
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
NOTICE OF RENEWAL INTENT
William G. Ross, Jr., Secretary
Alan W. Klimek, P.E., Director
Application for renewal of existing coverage under General Permit NCG500000
Existing Certificate of Coverage (CoC): NCG500110
(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 State NC ZIP Code 28202
Telephone Number(704) 382-4309 Fax: [phone]
Email address iastowe(a,duke-energy.com
* Address to which all permit correspondence should be mailed
2) Location of facility producing discharge:
Facility Name Tuxedo Hydroelectric Station
Facility Contact Randy Horton
Street Address Pot Shoal road
City Flat Rock State NC ZIP Code 28731
County Henderson
Telephone Number(828) 698-2070 Fax: ,NSA,
Email address wrhorton(@,duke-energy.com
3) Description of Discharge:
a) Is the discharge directly to the receiving stream? ® Yes p 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) : One
c) What type of wastewater is discharged? Indicate which discharge points, if more than one.
® Non -contact cooling water
Outfall(s) #: 001
Cl Boiler Slowdown Outfall (s) #:
Page 1 of 3

NCG500000 renewal application
❑ Cooling Tower Blowdown Outfall (s) #:
❑ Condensate Outfall (s) #:
❑ Other Outfall (s) #:
(Please describe "Other")
d) Volume of discharge per each discharge point (in GPD):
#001: 43,200_ #002: #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 ❑ Biocides ❑ Corrosion inhibitors ❑ Algaecide ❑ 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: ® Continuous ❑Intermittent ❑ Seasonal*
i) If the discharge is intermittent, describe when the discharge will occur:
ii) *Check the month(s) the discharge occurs: ❑ Jan ❑ Feb ❑ Mar. ❑ Apr ❑ May ❑ Jun ❑
Jul ❑ 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). Green River
b) Stream Classification: TR,C
Page 2 of 3

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 of Applicant) (Date gned)
North Carolina General Statute 143-215.6 b (i) provides that:
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.)
asaeasaeasacaeasaeasaca
This Notice of Renewal Intent does NOT require a separate fee.
The permitted facility 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

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
ANGELA GROOMS
TUXEDO HYDROELECTRIC PLANT
13339 HAGERS FERRY RD MAIL CODE EC 11E
HUNTBRSVILLE, NC 28078
Dear Permittee:
1 ILT••
A4'Y�;i
NC ENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NarURAL RESOURCES
Subject: Reissue - NPDES Wastewater Discharge Permit
Tuxedo Hydroelectric Plant
COC Number NCG500110
Henderson County
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

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
GENERAL PERMIT NO. NCG500000
CERTIFICATE OF COVERAGE No. NCG500110
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
TUXEDO HYDROELECTRIC PLANT
NCSR 1836
FLAT ROCK
HENDERSON COUNTY
to receiving waters designated as the Green River, a class C Tr water, in the Broad 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

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
David F. Mitchell
Duke Power Company
13339 Hagers Ferry Road
Huntersville , NC 28078
X!MAI
A&'
EDFEE HNR
July 24,1997
Subject: Certificate of Coverage No. NCG500110
Renewal of General Permit
Tuxedo Hydro Plant
Henderson County
Note: Effluent limitations for this hydroelectric facility are found on pages A.2. and A.3.
Dear Permittee:
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.
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
Asheville Regional Office
NPDES File
Facility Assessment Unit
P.O. Box 29535, Raleigh, North Carolina 27626-0535 [phone] FAX [phone] p&eddem.ehnr.state.nc.us
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. NCG500110
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,
Duke Power Company
is hereby authorized to discharge
cooling water and other waters associated with hydroelectric operations
from a facility located at
Tuxedo Hydro Plant
NCSR 1836
Flat Rock
Henderson County
to receiving waters designated as subbasin 30803 in the Broad 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
Division of Water Quality
By Authority of the Environmental Management Commission

State of North Carolina
Department of Environment, Health and Natural Resources
Division of Water Quality
512 North Salisbury Street•Raleigh, North Carolina 27626
James B. Hunt, Jr., Governor A. Preston Howard, Jr., P.E.
Jonathan B. Howes, Secretary Director
NOTICE OF INTENT
National Pollutant Dischgrae Elimination System
Application for Coverage under General Permit NCG500000; Non -contact cooling water, boiler blowdown, cooling tower blowdown,
condensate, and similar point source discharges.
1. Name, Address, location, and telephone number of facility requesting Permit.
A. Official Name:
Duke Power Company - Tuxedo Hydro Statiorr-
B. Mailing Address:
c/o John Carter - I
(1) Street Address;
13339 Hagers Ferry Road
(2) City;
(3) State;
Huntersville .T
North Carolina
(4) Zip;
28078 - 7929
(5) County;
Mecklenburg •• _
C. Location. (Attach map delineating general
facility location)
(1) Street Address;
NCSR 1836, Route 1 Box 104 -D
(2) City;
Flat Rock
(3) State;
North Carolina 28731
(4) County,
Henderson
D. Telephone Number;
(7 0 4) 6 9 8- 2 0 7 0
2. Facility Contact:
A. Name;
Mike Bradshaw
B. Title;
Supervisor
C. Company Name;
Duke Power Company
D. Phone Number;
(7 0 4) 6 9 8- 2 0 7 0
3. Application type (check appropriate selection):
A. New or Proposed;
B. Existing; x
If previously permitted, provide permit number NCG5 0 0 0110
and issue date May 2 5 , 19 9 3 "
C. Modification;
(Describe the nature of the modification):
4. Description of discharge
A. Please state the number of separate discharge points.
1,❑; 2.®; 3,❑; 4,❑; ,❑.
B. Please describe the amount of wastewater being discharged per each separate discharge point:
1:211 6 0 0 gallons per day (gpd) 2:21, 6 0 0 (gpd) 3: (gpd) 4: (gpd)
Page 1
sTF NCD0027F.I

' C. Check the duration and frequency of the discharge, per each separate discharge point:
1. Continuous:
2. Intermittent (please describe): Only when unit operates
A
3. Seasonal (check month(s) the discharge occurs): January ® ; February ® ; March ® ; April ® ; May ® ; June ® ; July p ;
August ® ; September ® ; October ® ; November] ', December ® . Di scharge Can occur any month
4. How many days per week is there a discharge? (check the days the discharge occurs) Di scharge can occur any day
Monday ® , Tuesday ® , Wednesday ® , Thursday Zj , Friday ® , Saturday ® , Sunday ® .
5. How much of the volume discharged is treated? (state in percent) 0 %
What type of wastewater is discharged, per separate discharge point? (place check next to correct type):
1. Non -contact cooling water, x
2. Boiler blowdown;
3. Cooling tower blowdown;
4. Condensate;
5. Other (please describe); See Attachment 9
Please list any known pollutants that are present in the discharge, per each separate discharge point (if applicable);
E. Please describe the type of process the cooling water is being discharged from, per separate discharge point (i.e. compressor,
boiler blowdown, cooling tower blowdown, air conditioning unit, etc.):Once through cooling water
(See Attachment 9)
F
Please check the type of chemical added to the wastewater for treatment or other, per separate discharge point:
1. Biocides;
2. Corrosion inhibitors;
3. Chlorine;
4. Algae control;
5. Other (please describe);
6. None; X
If 1, 2, 3, 4, or 5 was checked, please state the name and manufacturer of the chemical additive. Also include a completed Biocide
101 form, and manufacturers' information on the additive with the application for the Division's review.
G. Is there any type of treatment being provided to the wastewater before discharge? (i.e. retention ponds, settling ponds, etc.); if yes,
please describe. Give design specks (i.e. design volume, retention time, surface area, etc.). Existing treatment facilities should be .
described in detail and design criteria or operational data should be provided (including calculations) to ensure that the facility can
comply with requirements of the General Permit. None
NOTE: Construction of any wastewater treatment facilities require submission of three (3) sets of plans and specifications along with their
application. Design of treatment facilities must comply with requirement 15A NCAC 2H .0138. If construction applies to the
discharge, include the three sets of plans and specifications with the application.
5. What is the nature of the business applying for this permit?Public Utility, Electricity Generation
C-
Name of receiving water: Green River Classification: C Tr.
(Attach a USGS topographical map with ail discharge point(s) clearly marked)
Page 2
STF NCDO027F.2

7. tslthe discharge directly to the receiving water? M N) Y
If no, state specifically the discharge point. Mark clearly the pathway to the potential receiving waters on the site map. (This
includes tracing the pathway of the storm sewer to its discharge point, if a storm sewer is the only viable means of discharge.)
8. Please address possible non -discharge aftematives for the following options:
A. Connection to a Regional Sewer Collection System; Not available
B. Subsurface Disposal; Too much fl ow
C. Spray Irrigation; Not justifiable, no significant thermal gradient or pollutant load
9. 1 certify that I am familiar with the information contained in the application and that to the best of my knowledge and belief such
information is true, complete, and accurate.
Printed Name of Person Signing
Title
Date Application Signed
Signature of Applicant
T.C. McMeekin
Senior V.P. Power Generation
1/-10/97
1^6)WC,A,'4
NORTH CAROLINA GENERAL STATUTE 143-215.6E (1) PROVIDES THAT:
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 $10,000, 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 $.10,000 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 $400.00 made payable to the North Carolina Department of Environment,
Health, and Natural Resources. Mail three (3) copies of entire package to:
Division of Environmental Management
NPDES Permits Group
Post Office Box 29535
Raleigh, North Carolina 27626-0535
Page 3
STF NCDO027F 3

ZIRCONIA QUADRANGLE
NORTH CAROLINA—SOUTH CAROLINA
7.5 MINUTE SERIES (TOPOGRAPHIC) 203-NW
NW/4 TIGERVILLE 15' nUAORANCLE
5,
i ( ' 990 000 FEET K C.)l 82 0 22"
Q— _� J t.il .�•p; a ��
.' Ziq is �. �� . i�l' = • ' �u
Jol
Ch �' ' Tuxedo Hydro Station
• •.. _• _ ga-Moun = ... ro 3fo
0 r• l ,, °e amp " /�
000
gam` : ' • • __:Z roonia rge.i`iki • s.
• 11 • Station)
UP
j ,a6M ::G / 2 - — 9`!.\t / •ram—�\\��%
03 am
•iy 1 • C ads Ch % �� O -v��r ij —�'•r� / //
•
• �a : �t11(atOF� Q°\ 1 • •.-��•-: '�. �r^� ��,_�'�' .r - •'f i I
• • . ;a� ..: 21 p'' • •t • . "�a4t �OFt 2 ; n - . i 380
.• ^ l �— _ :
17
fl. •` . • � �: • 1.�: � '�� ,i'.•✓�'� � ,' ; Ij ' jai '• '� '� .. -� i
••.� • :•• . �-�" ••• � ; i ;� .,��` . s •, '�•'•` L . 'fir-�!! ' ie7"� � �'`�'��s/i J O � � ; ,� ; .•yam •�
drly
cl
380
0 Lake.
. •.\ \ _� �� 1 /j-:.• '' .rya.. '; Hp sea
• = •_ �. I / \1 ! ��� ''`-1�\� ♦\��``\ � ate/' _
380
SECTION OF USGS TOPOGRAPHIC
MAP OF THE AREA AROUND
TUXEDO HYDRO STATION
SCALE 1:24000
0 tULE
t000 0 1000 2000 3000 4000 5000 6000 70W FEET
1 .0 0 1 KLOME TER
CONTOUR INTERVAL 20 FEET

GENERAL PERMITS
COPIES OF PERMITS ARE TO BE SENT
TO THE FOLLOWING:
SIGNED ORGINAL TO APPLICANT **
SIGNED COPY TO CENTRAL FILES
COPY TO REGIONAL OFFICE
COPY TO P&E FILE
COPY TO COMPLIANCE
COPY TO WAKE COUNTY
_COPY TO MECKLENBURG COUNTY
COPY TO TRAINING & CERT.**
**ATTACH COPY OF GENERAL PERMIT

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
May 25,1993
Timothy Huffman
13339 Hagers Ferry Road
Huntersville, NC 28078
LT'MWMA1
Fl
Subject: General Permit No. NCG500000
Duke Power Company
COC NCG500110
Henderson County
Dear Mr. Huffman:
In accordance with your application for discharge permit received on April 16, 1993, we are forwarding
herewith the subject certificate of coverage to discharge under the subject state - NPDES general permit.
Issuance of this certificate of coverage supercedes the individual NPDES permit No. NC0004502. 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 Division 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 Ms. Susan Robson at telephone number
919/733-5083.
Sincerely,
original Signed BY
c le n K Sullins
,. Freston Howard, Jr.
Director
cc:
Asheville Regional Office
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 501% recycled/ 10% post -consumer paper

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES
DIVISION OF ENVIRONMENTAL MANAGEMENT
GENERAL PERMIT NO. NCG500000
CERTIFICATE OF COVERAGE No. NCG500110
TO DISCHARGE NON -CONTACT COOLING WATER, COOLING TOWER AND BOILER BLOWDOWN,
CONDENSATE 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,
Duke Power Company
is hereby authorized to continue operation of a treatment system for the generation of non -contact cooling water from
2 generators with the discharge of wastewater from a facility located at
NCSR 1836
on the Green River
Henderson County
to receiving waters designated as the Green River in the Broad River Basin
in accordance with the effluent limitations, monitoring requirements, and other conditions set forth in Parts I, H, III
and IV of General Permit No. NCG500000 as attached.
This certificate of coverage shall become effective May 25, 1993
This Certificate of Coverage shall remain in effect for the duration of the General Permit.
Signed this day May 25, 1993
Original Si ned 13
Coleen H. Sns
A. Preston Howard, Jr., P.E.,Director
Division of Environmental Management
By Authority of the Environmental Management Commission

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CD
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Engineer Date Rec. # '
NPDES WASTE LOAD 1ALLOCATION o
Facility Name: buk e I`76u) L %-uX e140 S%al{,'on Date:
-VegSoo/io /
Existing Permit No.: Pipe No.: tOn County: dPnaer<en
Proposed Q
^/nn c.en ci'
Design Capacity (MGD): Industrial (% of Flow):
n Domestic (% of Flow):
Receiving Stream: (rra2/1 'JPh Class: C ^ow Sub -Basin: ®3-Ocq^©3 1 ff
Reference USGS Quad: (.A NW (Please attach) Requestor: ��� Regional Office
(Guideline limitations, if applicable, are to be listed on the back of this form.)
Design Temp.: Drainage Area: Avg. Streamflow:
7Q10:
Winter 7Q10:
Location of D.O.minimum (miles below outfall):
30Q2:
Slope:
Velocity (fps): K1 (base e, per day, 200C): K2 (base e, per day, 2000 :
Effluent
Characteristics
Monthly
Average
Comments
f¢ce,� ue'Mt W
:re ,.
Effluent
Charac/�teristics
Monthly
Average
Commen/t�ts
fst"" yea''(" Catt.., s2
a L'w
IF r 1
1
_ `y ■ a i+'
Original Allocation I. i
Revised Allocation Q Date(s) of Revision(s)
(Please attach previous allocation)
Confirmation �7
Prepared By:-pa.A'-� C. �` Reviewed By: . zef � Date:

REQUEST NO. : 797
*#**#****#********** WASTELOAD ALLOCATION APPROVAL_ FORM ******************
FACILITY NAME
TYPE OF WASTE
COUNTY
REGIONAL OFFICE
RECEIVING STREAM
7010 : CFS
DRAINAGE AREA
DUKE POWER -TUXEDO STATION
. COOLING WATER
HENDERSON
ASHEVILL.E REQUESTOR : HEL.E.N FOWLER
GREEN RIVER SUBBASIN : 030803
W7Q10 : CFS 3002 ; CFS
SO.MI. STREAM CLASS tC-TR
#*************#*#
RECOMMENDED EFFLUENT
LIMITS
****W*W*************
p k &/-
WASTEFLOW(S)
(MGD)
:
THE
DISCHARGE SHALL NOT CAUSE
BOD-5
(MG/L)
:
THE
TEMPERATURE OF RECEIVING
NH3--N
(MG/L.)
WATERS
TO EXCEED 0.54C ABOVE
D.O.
(MG/L)
:
THE
NATURAL STREAM TEMPERATURE
PH
(SU)
: 6-9
AND
IN NO CASE TO EXCEED 20'C,
FECAL COLIFORM
(/100ML):
TSS
(MG/L)
:
F'ACIL_ITY IS : PROPOSED ( ) EXISTING ('") NEW ( )
LIMITS ARE : REVISION ( ) CONFIRMATION ( ) OF THOSE PREVIOUSLY ISSUED
REVIEWED AND RECOMMENDED BY: nn MODELER__.`:_nn ��.�ODATE
i
SUPERVISOR.MODELINGG GROUP ____DATE
REGIONAL SUPERVISOR"/ ' ------- __
PERMITS MANAGER -sS-.._ZFLriI j?......_ IiATF : /f ------

SOC PRIORITY PROJECT
IF YES, SOC NUMBER
TO: PERMITS AND ENGINEERINGVNIT
WATER QUALITY SECTION
ATTENTION: Susan Robson
DATE: May 12, 1993
No
fd
MAY 1 1'
NPDES STAFF REPORT AND RECOMMENDA'`f"1'OIV't-.y`I
COUNTY Henderson j
PERMIT NUMBER "'^�,�z 9
NCGS00110
PART I - GENERAL INFORMATION
2
3
n
Facility and Address:
Date of Investigation:
Report Prepared By:
Duke Power Co. - Tuxedo Hydro Facility
13339 Hagers Ferry Road
Huntersville, N. C. 28078
Route 1, Box 104-D
Flat Rock. N. C. 28731
May 7, 1993
Paul White
Persons Contacted and Telephone Number:
d3-o�-03
cYt-
5. Directions to Site: The facility is located on the Green River 1
mile downstream of the Highway 176 crossing. Follow SR 1836 east
from Highway 176 for about 0.8 miles to Green River and
powerhouse.
6. Discharge Point(s), List for all discharge points:
Latitude: 350 14' 40" Longitude: 820 23' 25"
Attach a USGS map extract and indicate treatment facility site and
discharge point on map.
U.S.G.S. Quad No. G9NW U.S.G.S. Quad Name Zirconia
7. Site size and expansion area consistent with application? n/a
Yes No If No, explain:
Page 1 P L0 ' ED

8. Topography (relationship to flood plain included): The powerhouse
is located at the bottom of the gorge.
9. Location of nearest dwelling: >200 feet
10. Receiving stream or affected surface waters: Green River
a. Classification: C-Trout
b. River Basin and Subbasin No.: Broad River 03-08-03
C. Describe receiving stream features and pertinent downstream
uses: Narrow steep gorge with swift current. An 0.8 mile
section, 4 miles downstream of the power plant has a drop of
320 feet. Fish and wildlife propagation, fishing, canoeing,
and kayaking. Predominance of canoeing and kayaking is
downstream of the steepest section.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted 0.0216 mgd each for two
discharge points. MGD (Ultimate Design Capacity)
b. What is the current permitted capacity of the Wastewater
Treatment facility? Flow is not limited.
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:
none
e. Please provide a description of existing or substantially
constructed wastewater treatment facilities: none
f. Please provide a description of proposed wastewater treatment
facilities: none
g. Possible toxic impacts to surface waters: none
h. Pretreatment Program (POTWs only): n/a
in development approved
should be required not needed
2. Residuals handling and utilization/disposal scheme: none
a. If residuals are being land applied, please specify DEM
Permit Number
Residuals Contractor
Telephone Number
b. Residuals stabilization: PSRP PFRP OTHER
Page 2

r
c. Landfill:
d. Other disposal/utilization scheme (Specify):
3. Treatment plant classification (attach completed rating sheet):
n/a
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: n/a
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds
or are any public monies involved. (municipals only)? no
2. Special monitoring or limitations (including toxicity) requests:
none
3. Important SOC, JOC, or Compliance Schedule dates: (Please
indicate) none
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: Not feasible.
Connection to Regional Sewer System: None available.
Subsurface: Not feasible.
Other disposal options: none
5. Other Special Items: none
Page 3

PART IV -
EVALUATION AND RECOMMENDATIONS
The permittee uses cooling water for two generators. Coverage is
requested under General Permit NCG5000000 for two non -contact
cooling water outfalls. The Genera]. Permit is appropriate for
this discharge. It is recommended that a certificate of coverage
replace existing Permit Number NC0004502.
Signature of Report Preparer
Water Quality Regional Supervisor
Date
Page 4

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� r
Health and Natural 'Resources_ • •
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary p E H N F1
A. Preston Howard, Jr., P.E., Director
Timothy Huffman
13339 Hagers Ferry Road
Huntersville, NC 2,8078
Dear Mr. Huffman:
May 25, 1993
Subject: General Permit No. NCG500000
Duke Power Company.-
COC NCG500110
Henderson County
In accordance with your application for discharge permit received on April 16, 1993, we are forwarding
herewith the subject certificate of coverage to discharge under the subject state - NPDES general permit.
Issuance of this certificate of coverage supercedes the individual NPDES permit No. NC0004502. 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 Division 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 Ms. Susan Robson at telephone number
919/733-5083.
Sc rely, _
reston ward, Jr.
Director
cc:
Asheville Regional Office
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 1 o% post -consumer paper