NC0027359_Permit (Issuance)_20070910

NPDE:i DOCIMENT SCANNING COVER SHEET
NPDES Permit:
NC0027359
Hiwassee
Hydro Plant
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Permit
History
Document Date:
September 10, 2007
This document is printed on reuse paper - ignore any
content on the reYerse side

Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Coleen H. Sullins, Director
Division of Water Quality
September 10, 2007
Ms. Janet C. Herrin, P.E.
Senior Vice President River Operations
Tennessee Valley Authority
400 West Summit Hill Drive
Knoxville, Tennessee 37902-1401
Subject: Issuance of NPDES Permit
Permit NC0027359
Hiwassee Hydro Plant
Cherokee County
Dear Ms. Herrin:
Division personnel have reviewed and approved your application for renewal of the subject permit.
Accordingly, we are forwarding the attached NPDES discharge 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 U.S. Environmental Protection Agency dated May 9, 1994 (or as subsequently amended).
This final permit includes the following change from Hiwassee Hydro Plant's current NPDES
permit:
Special condition for oil and grease and pH monitoring has been deleted.
If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable
to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt
of this letter. This request must be in the form of a written petition, conforming to Chapter 150B of the North
Carolina General Statutes, and filed with the Office of Administrative Hearings (6714 Mail Service Center,
Raleigh, North Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division may
require modification or revocation and reissuance of the permit. 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, the 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 Agyeman Adu-Poku at telephone
number [phone], extension 508.
Sincerely,
r ; Coleen H. Sullins/
cc: Central Files
NPDES File
Asheville Regional Office / Surface Water Protection
Nor Carolina
Naturally
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone [phone]
Internet: www.ncwateraualitv.org Location: 512 N. Salisbury St. Raleigh, NC 27604 Fax [phone]
Customer Service

Permit NC0027359
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER 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, the
Tennessee Valley Authority
is hereby authorized to discharge wastewater from a facility located at
Hiwassee Hydro Plant
at the Hiwassee Dam
west of Hiwassee Village
Cherokee County
to receiving waters designated as the Hiwassee River in the Hiwassee River Basin
in accordance with effluent limitations, monitoring requirements, and other conditions set forth in
Parts I, II, III, and IV hereof.
This permit shall become effective October 1, 2007.
This permit and authorization to discharge shall expire at midnight on August 31, 2012.
Signed this day September 10, 2007.
r Coleen H. Sullins, Dire or
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0027359
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby
revoked. As of this permit issuance, any previously issued permit bearing this number is no longer
effective. Therefore, the exclusive authority to operate and discharge from this facility arises under the
permit conditions, requirements, terms, and provisions included herein.
Tennessee Valley Authority is hereby authorized to:
I. Continue to discharge water from a station sump which receives flow from wheel pit leakage
and power house floor drains (Outfall 001), discharge unwatering sump water (Outfall 002),
discharge non -contact cooling water (Outfalls 003 and 004), and discharge station sump
water, as well as upper and lower gallery drain water (Outfall 005), located at Hiwassee
Hydro Plant, at the Hiwassee Dam, west of Hiwassee Village, Cherokee County and
2. Discharge from said facility at the location specified on the attached map into the Hiwassee
River which is classified C waters in the Hiwassee River Basin.

Tennessee Valley Authority
Hiwassee Hydro Plant
State Grid/Quad: G2NW/Unaka, NC Drainage Basin: Hiwassee River Basin
Latitude: 35° 09' 0l" N Sub -Basin: 04-05-02
Longitude: 84° 10' 41" W
Receiving Stream: Hiwassee River
Cfrsrom ('loco• ('
NPDES Permit No. NC0027359

Permit NC0027359
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to
discharge waters from the station sump (receiving flow from Unit 1 floor drains and wheel pit leakage) from outfall(s)
serial number 001. Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT;':
T,IMITS '
-
MON1TORINGRE UTREMENTSit.A.
.`
HARACTERISTICS
? '
Monthly
• Average
- Weekly :,
`Average
, t Daily •
-:Maximum
Measurement
- Frequency
SSample -
> Type°` `
, ample,,,. F,
• Locations
Flow
Quarter�l
Estimate
_
E
Oil and Grease2
15 mg/1
20 mg/1
2
E
pH3
_
E
Notes:
1 Sample locations: E — Effluent.
2 The tailrace shall be visually inspected for oil sheens at least once a quarter at this hydroelectric facility. Confirmation that a
visual inspection was conducted should be clearly noted on the Discharge Monitoring.Report (DMR) form
3 The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units unless ambient river conditions prevent
compliance with this range.
Best management practices must be employed to ensure that excessive pollutants are not discharged to the surface
waters of the State These practices should include, as a minimum, changing oil absorbent pads quarterly and cleaning
accumulated sediment in the bottom of the sump routinely.
Chemical wheel pit cleaning is permitted on a monthly basis. When cleaning of the wheel pit occurs, the tailrace shall be
inspected visually for foam and oil. Cleaning shall be conducted only with pre -approved solvents. Should the Permittee
wish to change cleaning solvents, a written request should be made to the Division including the MSDS for the proposed
solvent.
This permit does not limit mechanical cleaning operations which do not contribute any wastewater to the discharge. Non -
discharging cleaning operations may be conducted as often as necessary to ensure safety and proper facility operation.
The Permittee shall obtain authorization from the Division prior to the use of any chemical additive in the discharge.
The Permittee shall notify the Director in writing at least ninety (90) days prior to instituting use of any additional
additive in the discharge that may be toxic to aquatic life (other than additives previously approved by the Division).
Such notification shall include completion of Biocide Worksheet Form 101 (if applicable), a copy of the MSDS for
the additive, and a map indicating the discharge point and receiving stream.
Monitoring results obtained during the previous calendar quarter shall be recorded and reported on a Discharge
Monitoring Report (DMR) form and postmarked no later than the 30t day following the completed reporting period. The
first DMR is due on the 30t day of the month following the calendar quarter in which the permit was issued. The Permittee
shall confirm in writing that BMPs have been employed as specified in this permit with each DMR submitted.
There shall be no discharge of floating solids or visible foam (other than trace amounts) in the effluent.

Permit NC0027359
A. (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to
discharge waters from draft tube unwatering operations from outfall(s) serial number 002. Such discharges shall be
limited and monitored by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
Flow
Oil and Grease2
pH3
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
15 mg/1
Weekly
Average
Daily
Maximum
20 mg/1
Measurement:.
' Frequency
Quarterly
2
Estimate
Sample
Location''
E
E
Notes:
Sample locations: E - Effluent.
2 The tailrace shall be visually inspected for oil sheens at least once a quarter at this hydroelectric facility. Confirmation that a
visual inspection was conducted should be clearly noted on the Discharge Monitoring Report (DMR) form.
3 The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units unless ambient river conditions prevent
compliance with this range.
Best management practices must be employed to ensure that excessive pollutants are not discharged to the surface
waters of the State. These practices should include, as a minimum, changing oil absorbent pads quarterly and cleaning
accumulated sediment in the bottom of the sump routinely.
Chemical wheel pit cleaning is permitted on a monthly basis. When cleaning of the wheel pit occurs, the tailrace shall be
inspected visually for foam and oil. Cleaning shall be conducted only with pre -approved solvents. Should the Permittee
wish to change cleaning solvents, a written request should be made to the Division including the MSDS for the proposed
solvent.
This permit does not limit mechanical cleaning operations which do not contribute any wastewater to the discharge. Non -
discharging cleaning operations may be conducted as often as necessary to ensure safety and proper facility operation.
The Permittee shall obtain authorization from the Division prior to the use of any chemical additive in the discharge.
The Permittee shall notify the Director in writing at least ninety (90) days prior to instituting use of any additional
additive in the discharge that may be toxic to aquatic life (other than additives previously approved by the Division).
Such notification shall include completion of Biocide Worksheet Form 101 (if applicable), a copy of the MSDS for
the additive, and a map indicating the discharge point and receiving stream.
Monitoring results obtained during the previous calendar quarter shall be recorded and reported on a Discharge
Monitoring Report (DMR) form and postmarked no later than the 30`h day following the completed reporting period. The
first DMR is due on the 30`h day of the month following the calendar quarter in which the permit was issued. The Permittee
shall confirm in writing that BMPs have been employed as specified in this permit with each DMR submitted.
There shall be no discharge of floating solids or visible foam (other than trace amounts) in the effluent.

Permit NC0027359
A. (3). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to
discharge once -through cooling waters from generator air cooling and bearing cooling from outfall(s) serial number
003 and 004. Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT:.
C}IARACTERISTICS
; � � 4
:
G z; ...,
LIMITS r
' L ' .Ti'.4 r• ..' r '
MONITORING REQUIREMENTS ,
. '> , "•Y �.. ii` 1 `.-r,�'s .-y ` `'
Monthly
' Average
Weekly.
Averake
: Dail ,
,y ,
;,' Maximum
MeasurementSample
::" Frequency ., .:
,
' ' TypeY:.
,<Saniplei 0.
L. Location' `
Flow
Semi-annually
Estimate
E
Temperature2
2
2
E
pH3
E
Notes:
1 Sample locations: E — Effluent.
2 The temperature of the effluent will be regulated so that the temperature of the receiving stream does not increase more than 2.8°C
above the natural water temperature. Receiving water temperature shall not exceed a maximum of 29 C due to the facility's
operation.
3 The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units unless ambient river conditions prevent
compliance with this range.
The Permittee shall obtain authorization from the Division prior to the use of any chemical additive in the discharge.
The Permittee shall notify the Director in writing at least ninety (90) days prior to instituting use of any additional
additive in the discharge that may be toxic to aquatic life (other than additives previously approved by the Division).
Such notification shall include completion of Biocide Worksheet Form 101 (if applicable), a copy of the MSDS for
the additive, and a map indicating the discharge point and receiving stream.
Monitoring results obtained during the previous calendar quarter shall be recorded and reported on a Discharge
Monitoring Report (DMR) form and postmarked no later than the 30t day following the completed reporting period. The
first DMR is due on the 30rh day of the month following the calendar quarter in which the permit was issued.
There shall be no discharge of floating solids or visible foam (other than trace amounts) in the effluent.

Permit NC0027359
A. (4). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to
discharge waters from the lower and upper gallery drains, and waters from Unit 2 floor drains and wheel pit
leakage, from outfall(s) serial number 005. Such discharges shall be limited and monitored by the Permittee as specified
below:
Monthly,
Average
Measurement;;
Frequency
ample
Type
Flow
Oil and Grease2
15 mg/1
20 mg/1
Quarterly
2
Estimate
pH3
Notes:
1 Sample locations: E — Effluent.
2 The tailrace shall be visually inspected for oil sheens at least once a quarter at this hydroelectric facility. Confirmation that a
visual inspection was conducted should be clearly noted on the Discharge Monitoring Report (DMR) form.
3 The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units unless ambient river conditions prevent
compliance with this range.
Best management practices must be employed to ensure that excessive pollutants are not discharged to the surface
waters of the State. These practices should include, as a minimum, changing oil absorbent pads quarterly and cleaning
accumulated sediment in the bottom of the sump routinely.
Chemical wheel pit cleaning is permitted on a monthly basis. When cleaning of the wheel pit occurs, the tailrace shall be
inspected visually for foam and oil. Cleaning shall be conducted only with pre -approved solvents. Should the Permittee
wish to change cleaning solvents, a written request should be made to the Division including the MSDS for the proposed
solvent.
Mechanical cleaning operations which do not contribute any wastewater to the discharge are not limited by this permit.
Non -discharging cleaning operations may be conducted as often as necessary to ensure safety and proper facility operation.
The Permittee shall obtain authorization from the Division prior to the use of any chemical additive in the discharge.
The Permittee shall notify the Director in writing at least ninety (90) days prior to instituting use of any additional
additive in the discharge that may be toxic to aquatic life (other than additives previously approved by the Division).
Such notification shall include completion of Biocide Worksheet Form 101 (if applicable), a copy of the MSDS for
the additive, and a map indicating the discharge point and receiving stream.
Monitoring results obtained during the previous calendar quarter shall be recorded and reported on a Discharge
Monitoring Report (DMR) form and postmarked no later than the 30`h day following the completed reporting period. The
first DMR is due on the 30`h day of the month following the calendar quarter in which the permit was issued. The Permittee
shall confirm in writing that BMPs have been employed as specified in this permit with each DMR submitted.
There shall be no discharge of floating solids or visible foam (other than trace amounts) in the effluent.

Re: upcoming permit reissuance for NPDES Wastewater???
Subject: Re: upcoming permit reissuance for NPDES Wastewater???
From: Brian <[e-mail]>
Date: Tue, 21 Aug 2007 08:32:53 -0700 (PDT)
To: [e-mail], [e-mail], [e-mail],
[e-mail], [e-mail], [e-mail], bob.sledge®ncmail.net,
[e-mail], [e-mail], [e-mail]
Brian Sutphin <[e-mail]> wrote:
I have been in the hospital and have not been able to write my letter to the NCEMC
opposing the reissuance of permits:
NPDES
NC0000396 French Broad
NC0035386 Thompson Branch
NC0027359 Hiwassee
NC0021148 Hiwassee
NC0026697 Hiwassee
NC0027332 Hiwassee
NC0021547 Little Tenn. River
NC0058378 Elk River
The following three are extremely disturbing and more than likely illegal. They are releasing
wastewater that eventually flows into the Wild and Scenic Chattooga River, which is
protected by Congress by the WSRA!
NC0062553 Silver Run Creek
NC0037711 Brooks Creek
NC0061930 East Fork Overflow
The practice of releasing this treated wastewater is causing degredation to our waterways
and eventually our oceans. These practices need to be stopped.
There are many communities across the country that are reclaiming this wastewater and
using it for non -potable purposes. ie: watering lawns, washing vehicles, flushing toilets, ect.
Enviromentally safe practices like these take a great burden off our freshwater resources that
can use all the help that society can give them. We must give our enviroment the utmost
respect.
Seeing that Western North Carolina has such a great influence on water supplies across
one-half the nation, we need to be at the forefront of water quality and protection!
Care2 make the world greener!
http://toolbar.Care2.com Make your computer carbon -neutral (free).
http://www.Care2.com Green Living, Human Rights and more - 7 million members!
1 of 2 8/22/2007 8:30 AM

PUBLIC NOTICE
STATE OF NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT
• COMMISSION/NPDES UNIT
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617 .
NOTIFICATION OF INTENT TO ISSUE
A NPDES WASTEWATER PERMIT
On the basis of thorough staff review
and application of NC General Statute
143.21, Public Law 92-500 and other
lawful standards and regulations, the
North Carolina Environmental Man-
agement Commission proposes to
. issue a National Pollutant Discharge
Elimination System (NPDES)vaste•
water discharge permit to the persons)
listed below effective 45 days from the
publish date of this notice.
Written comments regarding the proposed
permit wit be accepted until 30 days
after the publish date of this notice. All
comments received prior to that date
are considered in the final determina-
tions regarding the proposed permit.
The Director of the.NC Division of
Water Quality may decide to hold a
public meeting for the proposed permit
should the Division receive a significant
degree of public interest.
Copies of the draft permit and other
supporting information on file used to
determine conditions present in the
draft permit are available upon request
and payment of the costs of reproduc-
lion. Mail comments and/or requests
for information to the NC Division of
Water Quality at the above address
or call Ms. Frances Candelaria (919)
733-5083, extension 520 atthe Point
Source Branch. Please include the NP-
DES permit number (attached) in any
communication. Interested persons
may also visit the Division of Water
Quality at 512 N. Salisbury Street, •
Raleigh, NC 27604-1148 between
the hours of 8:00a.m. and 5:00p.m.
to review information on file.
Cherokee County Schools has ap-
plied for renewal of NPDES permit
NC0035386 for the Hiwassee Dam
School WWTP. This permitted facility
discharges treated wastewater into
Thompson Branch in the Hiwassee
River Basin. Currently, ammonia -ni-
trogen and total residual chlorine are
water quality limited. This discharge
may affect future allocations in this
portion of the watershed.
The Tennessee Valley Authority (600
Powerhouse Road, Murphy, North
Carolina) has applied for a renewal
of NPDES Permit NC0027359 for
Hiwassee Hydro Plant in Cherokee
County. This permitted facility dis-
charges once -through water to the
Hiwassee River within the Hiwassee
River Basin. This discharge may affect
future allocations in this portion of the
Hiwassee River.
NORTH CAROLINA
Cherokee County
AFFIDAVIT OF PUBLICATION
Before the undersigned, a Notary Public of said County and state,
duly commissioned, qualified, and authorized by law to administer
oaths, personally appeared.
David Brown
who being first duly sworn, deposes and says that ... he is
Publisher
(Owner, publisher or employee authorized to make this affidavit)
engaged in the publication of a newspaper known as the
CHEROKEE SCOUT
published, issued, and entered as second class mail in the City of Murphy, in said
County and State, that ... he is authorized to make this affidavit and sworn statement,
that the notice or other legal advertisement, at true copy of which is attached -
hereto, was published in the Cherokee Scout on the following dates:
July 25 2007
and that the said newspaper in which such notice, paper, document, or legal
advertisement was published was, at the time of each and every publication, a
newspaper meeting all of the requirement and qualifications of Section 1-597
of the General Statutes of North Carolina and was a qualified newspaper within
the meaning of Section 1-597 of the General Statutes of North Carolina.
This 711,r.day of..
20C/7
(signature of person making affidavit)
Sworn to and subscribed before me this
40)444/
Notary Public
My Commission expires
(SEAL)
day
20.Q1
may/ 20/e)

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0027359
Facility Information
Applicant/Facility Name:
Tennessee Valley Authority — Hiwassee Hydro Plant
Applicant Address:
400 West Summit Hill Drive; Knoxville, TN 37902
Facility Address:
Hiwassee Dam west of Hiwassee Village; Cherokee County, NC
Permitted Flow
Not limited
Type of Waste:
100% industrial; SIC: 4911 Primary: 48
Facility/Permit Status:
Class I /Active; Renewal
County:
Cherokee County
Miscellaneous
Receiving Stream:
Stream Classification:
Hiwassee River
C
Regional Office:
State Grid / USGS Quad:
Asheville
G2NW/Unaka, NC
303(d) Listed?
Subbasin:
No
04-05-02
Permit Writer:
Date:
Agyeman Adu-Poku
7/18/07
Drainage Area (mi2):
N/A
Summer 7Q10 (cfs)
250
Winter 7Q10 (cfs):
N/A
30Q2 (cfs)
N/A
Average Flow (cfs):
IWC (%):
N/A
N/A (variable flow
— not limited)
addmillr
Lat. 35° 09' 02" N Long. 84° 10' 44" W
BACKGROUND
The Hiwassee Hydro Plant produces electricity via hydraulic turbine generation. The facility
produces an average of 1,000 megawatt -hours per day of power, with peak power generation at 2,904
megawatt -hours per day. The Asheville Regional Office notes that most of the Hiwassee River's flow is
run through the facility for power production.
The plant has five permitted outfalls as follows:
001: waters from the station sump
002: waters from the draft tube unwatering operations
003 and 004: once through cooling water from generator air and bearing cooling
005: waters from upper galley drains and Unit 2 floor drains and pit leakage
None of the outfalls contain a limit for flow and all employ Best Management Practices (BMPs)
rather than monitoring for pH, oil and grease, and temperature. Each DMR report contains a statement
affirming that BMPs are being used on site. The staff report and permit fact sheet from the previous
permit indicate that a general permit is not entirely appropriate for this facility.
Instream Monitoring and Verification of Existing Conditions and DMR Data Review
This facility discharges to the Hiwassee River (classified C) in sub -basin 04-05-02 (Hiwassee
River Basin). The facility does not currently perform instream monitoring. Discharge Monitoring
Reports (DMRs) for flow (the only monitored parameter) were reviewed from 2004 to present.
PERMITTING STRATEGY
Waste Load Allocation (VVLA)
The Division prepared the last WLA in 1985. The previous and current effluent limits were
based on guidelines and water quality standards. The Division has judged previous parameters and limits
to be appropriate for renewal. The current Hiwassee River Basinwide Water Quality Plan reports that
the receiving stream is currently supporting all designated uses and provides no recommendations for this
discharger.
Fact Sheet
NPDES NC0027359 Renewal
Page 1

Reasonable Potential Analysis (RPA)
Since toxicants are not monitored in this discharge, no reasonable potential analysis was
performed.
SUMMARY OF PROPOSED CHANGES
The Permittee requested the special condition for monitoring of oil and grease be deleted. The special condition
will be deleted because the four samples provided for outfalls 001, 002 and 005 relating to oil and grease and pH
showed no impact on the receiving stream.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice: July 18, 2007
Permit Scheduled to Issue: September 10, 2007
NPDES DIVISION CONTACT
If you have questions regarding any of the above information or on the attached permit, please contact
Agyeman Adu-Poku at [phone] ext. 508.
NAME: DATE:
REGIONAL OFFICE COMMENTS
NAME: DATE:
SUPERVISOR: DATE:
Fact Sheet
NPDES NC0027359 Renewal
Page 2

Tennessee Valley Authority, 400 West Summit Hill Drive, Knoxville, Tennessee 37902-1401
Janet C. Herrin, P.E.
Senior Vice President
River Operations
February 7, 2007
Ms. Susan Wilson
North Carolina Department of Environment
and Natural Resources
Division of Water Quality/NPDES Unit
512 North Salisbury Street, Suite 942
Raleigh, North Carolina 27604
Dear Ms. Wilson:
TENNESSEE VALLEY AUTHORITY (TVA) - CHATUGE HYDRO (CTH) - NATIONAL
POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) PERMIT NO. NC0027332
AND HIWASSEE HYDRO (HIH) - NPDES PERMIT NO. NC0027359 PERMIT
RENEWAL APPLICATIONS
Enclosed are NPDES permit renewal application packets for CTH and HIH consisting of a
completed Short Form C, site maps, and wastewater flow schematic diagrams. The
current permits are scheduled to expire at midnight on August 31, 2007. Based on email
correspondence from you, TVA understands that the use of Short Form Cis allowed and
that data for grab samples is acceptable for characterizing the discharges from these
facilities.
Special conditions in the existing permit required monitoring to assess discharge impacts
and consisted of the collection of four oil and grease and pH samples from HIH Ouffalls
001, 002,. and 005 and CTH Ouffalls 001 and 002 over the duration of the permit. This
was in addition to quarterly letters certifying that best management practices (BMPs) were
followed. This monitoring was completed with the exception of the CTH unwatering outfall
(CTH Outfall 002) due to limited discharge. No excursions were noted. TVA requests
that the special condition monitoring not be required in the renewed permits and that only
the submission of quarterly BMP letters be continued.
TVA also requests a 30-day period between the issuance date and the effective date of
the reissued permits to facilitate internal distribution of the permit. If you have any
questions or would like additional information, please call Mike Stiefel at [phone]
in Chattanooga, Tennessee.
Sincerely,
anet C. Herrin
Enclosures
Printed on recycled paper

NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial
Minor industrial, manufacturing and commercial facilities.
Mail the complete application to:
N. C. Department of Environment and Natural Resources
Division of Water Quality / NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
NPDES Permit Number
NC0027359
If you are completing this form in computer use the TAB key or the up — down arrows to move from one
field to the next. To check the bows. click your mouse on top of the box Otherwise, please print or type.
1. Contact Information:
Owner Name
Facility Name
Mailing Address
City
State / Zip Code
Telephone Number
Fax Number
e-mail Address
Tennessee Valley Authority
Fliwassee Hydro Plant
400 West Summit Hill Drive, WT 10D
Knoxville
Tennessee / 37902
[phone]
[phone]
jcherrin(wtva.gov
2. Location of facility producing discharge:
Check here if same as above ❑
Street Address or State Road
City
State / Zip Code
County
600 Powerhouse Road
near Murphy
North Carolina/28906
Cherokee
3. Operator Information:
Name of the firm, consultant or other entity that operates the facility. (Note that this is not referring to the
Operator in Responsible Charge or ORC)
Name
Mailing Address
City
State / Zip Code
Telephone Number
Fax Number
Page 1015
Tennessee Valley Authority
400 West Summit Hill Drive, WT 10D
Knoxville
Tennessee / 37902
[phone]
[phone]
C-MI 03(05

NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial
Minor industrial, manufacturing and commercial facilities.
4. Ownership Status:
Federal ® State ❑ Private ❑ Public ❑
5. Standard Industrial Classification (SIC) code(s): 4911- Electric Services
6. Number of employees: 25
7. Describe the treatment system List all installed waste treatment components with capacities,
describe the processes that generate wastewaters. If the space provided is not sufficient attach a
separate sheet of paper with the system description.
Water discharged from Outfalls 001, 002, and 005 include waters from the station sump
(receiving flow from Unit 1 floor drains and wheel pit leakage), the draft tube, unwatering
operations, lower and upper gallery drains, Unit 2 floor drains and wheel pit leakage. Oil
absorbent pads are used in sumps and points of equipment oil leaks. These pads are changed
at least once a quarter in addition to the removal of sediment to ensure that excessive
pollutants are not discharged to surface waters of the State. It is assumed that the oil
absorbent pads treat 100% of the volume before discharge at normal flow.
8. Is facility covered under federal effluent limitation guidelines? No ® Yes ❑
If yes, specify the category?
9. Principal product(s) produced: Electric Power
Principal raw material(s) consumed: N(A
Briefly describe the manufacturing process(es):
TVA's conventional hydro plants typically include a dam to control the flow of a river, a powerhouse
containing turbines and generators to make electricity, a switchyard to step up the electricity's voltage
for distribution to customers, and a large reservoir of water behind the dam.
Water from the upper reservoir flows through a penstock (a large pipe connecting the reservoir to the
powerhouse) impacting the blades of a turbine. Water impacting the blades makes the turbine rotate.
A large diameter shaft connects the rotating turbine to a generator in the powerhouse. The generator
consists of a large rotating electromagnet (driven by the turbine) located in the middle of an even larger
set of stationary wire coils. When running at the proper speed (typically around 100 revolutions per
minute for TVA hydro generators), electricity is produced in the coils at anywhere from about 13,000 to
23,000 volts. Generator leads take the electricity to the switchyard where the voltage is increased and
put into the TVA transmission system for delivery to distributors across the Tennessee Valley. The
water used to turn the turbine then flows out of the powerhouse in a draft tube where it is released
into the water supply. Hiwassee Hydro Plant has two units, one conventional hydroelectric unit and
one reversible pump storage/ hydroelectric unit.
Page 2 of 5 C-MI 03l05

NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial
Minor industrial, manufacturing and commercial facilities.
10. Amount of principal product produced or raw material consumed
(List specific amounts consumed and/or units of production over the last three nears
Product Produced or Raw Material
Consumed
(AVERAGE)
Product Produced or Raw Material
Consumed
(PEAK)
per Day
656 megawatt -hours per day
3,638 megawatt -hours per day
per Month
19,918 megawatt -hours per month
60,684 megawatt -hours per month
per Year
238;987 megawatt hours per year
296,085 megawatt -hours per year
11. Frequency of discharge: Continuous* 0 Intermittent ❑
If intermittent:
Days per week discharge occurs: Duration:
* While individual discharges may not flow continuously, it is unlikely that there would be no discharge from any outfall,
unless all units were in outage.
12. Types of wastewater discharged to surface waters only
Discharge
Flow*
IGALLONS PER DAY)
Sanitary - monthly average
250 (estimated) subsurface disposal
Utility water, etc. - monthly average
N/A
Process water - monthly average
1,700,000 (Outfall 001 - Station Sump = 400,000 and
Outfall 002 - Unwatering Sump = 1,300,000)
Stormwater - monthly average
N/A
Other - monthly average
Explain: Cooling Water
4,250,000
Monthly Average
total discharge (all types)
5,950,000
*Note: Flows are estimated for average operating conditions using pump rated capacity or design capacity. **Unwatering
operations (outfall 002) are intennittent and typically occur approximately once every two years per unit. See attached flow
schematic.
13. Number of separate discharge points: S
Outfall Identification number(s) Outfalls 001, 002, 003, 004, and 005
14. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including
Iatitude and longitude):
Hiwassee River (See attached map)
Page 3 of 5
C-MI 03105

NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial
Minor industrial, manufacturing and commercial facilities.
15. Effluent Data
Provide data, for the parameters listed. Temperature and pH shall be grab samples, for all other parameters 24-hour
composite sampling shall be used. If more than one analysis is reported, report daily maximum and monthly average.
If only one analysis is reported, report as daily maximum.
Parameter
Daily
Maximum
Monthly
Average
Units of
Measurement
001
005
001
005
Biochemical Oxygen Demand (I3OD5)
5.2
5.5
N/A
N/A
mg/L
Chemical Oxygen Demand (COD)
< 50
<50
N/A
N/A
mg/L
Total Organic Carbon
2.62
1.33
N/A
N/A
mg/L
Total Suspended Solids
< 3.3
6.7
N/A
N/A
mg/L
Ammonia as N
< 0.5
< 0.5
N/A
N/A
mg/L
Temperature (Summer)
N/A
N/A
N/A
N/A
Degrees C
Temperature (Winter)
10.9
12.2
N/A
N/A
Degrees C
pH
6.9
6.9
N/A
N/A
units
Fecal Coliform (If sanitary waste is
present)
N/A
N/A
N/A
Total Residual Chlorine (if chlorine is
used)
N/A
N/A
N/A
Note: Data are for grab samples. The requirement for composite sampling was waived. Outfall
002 was not discharging when renewal samples were collected. The maximum pH for Outfall
002 for special monitoring during the current permit was 6.9.
16. List all permits, construction approvals and/or applications (check all that apply and provide permit
numbers or check none if not applicable):
Type
Permit Number Type
Hazardous Waste (RCRA) NESHAPS (CAA)
UIC (SDWA) Ocean Dumping (MPRSA)
NPDES NC0027359 Dredge or fill (Section 404 or CWA)
PSD (CAA) Other
Non -attainment program (CAA)
Permit Number
17. List any chemicals that may be discharged (Please list and explain source and potential
amounts.)
Small amounts of Oil and Grease may be discharged from outfalls as oil containing equipment is
located on site. The current NPDES permit has a daily max of 20 mg/L and a monthly average of
15 mg/L Oil and Grease. Monitoring has occurred under the current permit and no excursions
have occurred. The recent monitoring for this plant yielded 1.3 mg/L (001) and 1.4 mg/L (005)
O85G.
Page 4 of 5 C-MI 03/05

NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial
Minor industrial, manufacturing and commercial facilities.
18. Is this facility located on Indian country? (check one)
Yes
a
19. Applicant Certification
No E
I 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.
Janet C. Herrin
Printed name of Person Signing
Sign
Senior Vice President, River Operations
Title
c am. a-707
pplica:it Date
North Carolina General Statute 143-215.6 (b)(2) provides that: Any person who knowingly makes any false
statement representation, or certification in any application, record, report, plan, or other document files 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.)
Page 5 of 5 C-MI 03l05

UPPER
GALLERY DRAINS
LOWER
GALLERY DRAINS
UNIT 2 FLOOR DRAINS
UNIT 2 WHEEL PIT
LEAKAGE
GENERATOR AIR &
BEARING COOLING WATER
INTAKE FROM HIWASSEE RIVER
STATION
SUMP
0.720 MGD
ll; >
0.9216 MGD
O. ...... ......
0.2016 MGD
UNIT 1 2.052 MGD
_._._._._._UKIT2
DRAFT TUBE
UNWATERING OPERATIONS
UNIT 1 FLOOR DRAINS
AND WHEEL PIT LEAKAGE
POTABLE WATER
(EST. MAX. 400 GPD)
SANITARY SEWAGE
DRAINS
UNWATERING
SUMP
STATION
SUMP
Q
OUTFALL
005
003
004
2.606 MGD
002
7.776 MGD
0.432 MGD
> 001
>
SUBSURFACE
DISPOSAL FIELD
SYMBOLS:
RAW RIVER WATER, POTABLE WATER, RAIN WATER, OR GROUND WATER
NON -CONTACT COOLING WATER
OTHER WASTEWATER
Q MOTOR -DRIVEN PUMP
• EDUCTOR PUMP
NOTES:
1. ALL EFFLUENTS DISCHARGE INTO THE HIWASSEE RIVER.
2. FLOWS (OTHER THAN FOR SANITARY WASTE) ARE MAXIMUM RATES
AND ARE BASED ON PUMP RATED CAPACITIES OR MAXIMUM DESIGN
FLOW RATES.
3. THE SANITARY WASTE FLOW IS AN ESTIMATED MAXIMIMUM.
4. UNWATERING OPERATIONS (OUTFALL 002) OCCUR APPROXIMATELY
ONCE EVERY TWO YEARS PER UNIT.
TVA
HIWASSEE HYDRO PLANT
NPDES PERMIT NO. NC0027359
CHEROKEE COUNTY, NC
JANUARY 2007

FACT SHEET FOR EXPEDITED PERMIT RENEWALS
Basic Information to determine potential for expedited permit renewal
Reviewer/Date
f 6
Permit Number
iit
Facility Name0,7,,igoqa
f2/A /-
Basin Name/Sub-basin number
y o‘ 0.2
— r
Receiving Stream
/-4)
R42
Stream Classification in Permit
Does permit need NH3 limits?
71,`9
Does permit need TRC limits?
r-,9
Does permit have toxicity testing?
i‘,,9
Does permit have Special Conditions?
''''OD
Does permit have instream monitoring?
g
Is the stream impaired (on 303(d) list)?
itx7
Any obvious compliance concerns?
,tO
Any permit mods since last permit?
/1-40
Existing expiration date
Sig VO7
New expiration date
3/ /.2
New permit effective date
9 /, o 7
Miscellaneous Comments
YES
This is a SIMPLE EXPEDITED permit renewal (administrative
renewal with no changes, or only minor changes such as TRC, NH3,
name/ownership changes). Include conventional WTPs in this group.
This is a MORE COMPLEX EXPEDITED permit renewal (includes
Special Conditions (such as EAA, Wastewater Management Plan), 303(d)
listed, toxicity testing, instream monitoring, compliance concerns, phased
limits). Basin Coordinator to make case -by -case decision.
YES_ This permit CANNOT BE EXPEDITED for one of the following reasons:
• Major Facility (municipal/industrial)
• Minor Municipals with pretreatment program
• Minor Industrials subject to Fed Effluent Guidelines (lb/day limits for BOD, TSS,
etc)
• Limits based on reasonable potential analysis (metals, GW remediation organics)
• Permitted flow > 0.5 MGD (requires full Fact Sheet)
• Permits determined by Basin Coordinator to be outside expedited process
TB Version 8/18/2006 (NPDES Server/Current Versions/Expedited Fact Sheet)