NC0027359_Permit (Issuance)_20020621

Michael F. Easley, Govemor
State of North Carolina
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
June 21, 2002
Ms. Janet C. Herrin
Manager of Environmental Affairs
Tennessee Valley Authority
400 West Summit Hill Drive
Knoxville, Tennessee 37902
Subject: Issuance of NPDES 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).
As per your request, the references to specific sampling months for quarterly flow sampling have been
eliminated. This does not, however, affect the requirement to sample for flow at least once per quarter. Please also
note that although the permit has been signed June 21, 2002, the effective date of the permit is September 1, 2002.
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 Natalie Sierra at telephone number (919)
733-5083, extension 551.
Sincerely,
C1rigina Signed By
David A. Goodrich
Alan W. Klimek, P.E.
Director
Division of Water Quality
cc Asheville Regional Office — Water Quality Section
Technical Assistance and Certification Unit
NPDES Unit Filet
Central Files
North Carolina Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
ern
[phone] NCDENR
FAX [phone] Customer Service
On the Internet at htto://h2o.enr.state.nc.us/ 1 800 623.7748

•
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,
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 September 1, 2002.
This permit and authorization to discharge shall expire at midnight on August 31, 2007.
Signed this day June 21, 2002.
Original Signed By
David A. Goodrich
Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
i

Permit NC0027359
SUPPLEMENT TO PERMIT COVER SHEET
Tennessee Valley Authority
is hereby authorized to:
1. 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' 01" N Sub -Basin: 04-05-02
Longitude: 84° 10' 41" W
Receiving Stream: Hiwassee River
Stream Class: c
North
NPDES Permit No. NC0027359
Cherokee County
3

Permit NC0027359
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — FINAL
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
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location'
Flow
Quarterly'
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 30th day following the
completed reporting period. The first DMR is due on the 30th day of the month following the calendar
quarter in which the permit was issued. The Permittee shall confirm in uniting 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.
a
a

Permit NC0027359
A (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS -FINAL
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
Monthly
Average
Weekly
Averaje
Daily
Maximum
MONITORING REQUIREMENTS
Measurement
Frequency
Sample
Type
Sample
Location'
Flow
Oil and Grease2
pH3
15 mg/1
20 mg/1
Quarterly
2
Estimate
E
Notes:
i Sample locations: E - Effluent.
2 The tailrace shall be visually inspected for oil sheens
Confirmation that a visual inspection was conducted
Report (DMR) form.
3 The pH shall not be less than 6.0 standard units nor
conditions prevent compliance with this range.
at least once a quarter at this hydroelectric facility.
should be clearly noted on the Discharge Monitoring
greater than 9.0 standard units unless ambient river
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 30th day following the
completed reporting period. The first DMR is due on the 30th 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 - FINAL
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
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
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 29CC 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 30th day following the
completed reporting period. The fast DMR is due on the 30th 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.
b

Permit NC0027359
A (4). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
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:
EFFLUENT
LIMITS
MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type _
Sample
Location'
Flow
Quarterly
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
Confirmation that a visual inspection was conducted
Report (DMR) form.
3 The pH shall not be less than 6.0 standard units nor
conditions prevent compliance with this range.
at least once a quarter at this hydroelectric facility.
should be clearly noted on the Discharge Monitoring
greater than 9.0 standard units unless ambient river
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 30th day following the
completed reporting period. The first DMR is due on the 30th 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. (5.) SPECIAL CONDITION FOR MONITORING
In order to assess the impact of these discharges on the receiving stream, the Permittee is
required to submit four (4) data points for outfalls 001, 002 and 005 relating to oil and grease and
pH. The oil and grease and pH samples may be taken over the course of the permit life and the
resulting data shall be submitted prior to the next permit renewal.
B

AFFIDAVIT OF PUBLICATIO
BUNCOMBE COUNTY
SS
N I RTH CAROLINA
PUBLIC NOTICE
STATE OF
NORTH CAROLINA
ENVIRONMENTAL
MANAGEMENT
COMMISSION/
NPDES UNIT
1617 MAI L
SERVICE CENTER
RALEIGH NC27699-1617
NOTIFICATION OF
INTENT TO ISSUEA
NPDES WASTEWATER
PERMIT
On the basis of thorough
staff review and applica-
tion of NC General Statute
143.21, Public taw 92-500
and other lawful stan-
dards, and regulations, the
North Carolina Environ-
mental Management
Commission proposes to
issue a National Pollutant
Discharge Elimination,
System . (NPDES) waste-
water discharge permit to
the person(s) listed below
effective 45 days from the
publish date of this notice.
Written comments regard-
ing the Proposed permit
will be accepted until 30
days after the publish date
of this notice. All com-
ments received prior to
that date are considered in
the final determinations
regarding the proposed
permit. The Director of i
the NC Division of Water
Quality may decide to hold
a public meeting for the
proposed permit should
the Division receive a sig-
nificant degree of public
interest.
Copies of the draft permit
and other supporting in-
formation on file used to
determine conditions pre-
sent in the draft permit are
available upon request
and payment of the costs
of reproduction. Mail
comments and/or requests
for information to the NC
Division of Water Quality
at the above address or
call Ms. Christie Jackson
at (919) 7J,LSp27, extension
538. Please include the
NPDES permit number
(attached) in any com-
munication Interested
persons may also visit the
Division of Water Quality
at 512 N. Salisbury Street.
Raleigh, NC 27604-1148 be-
tween the hours of 8:00 am
1 and 5:00 pm to review in-
formation on file.
NPDES Permit Number
NC0027359. Tennessee Val-
ley Authority - Hiwassee
Hydro Plant, 400 West
Summit Hill Drive, Knox-
ville, TN 37902 has applied
for a permit renewal for a
faculty located in Chero-
kee County discharging
treated wastewater into
Hiwassee River in the Hi-
wassee River Basin. Cur-
rently no parameters are
water quality limited. This
discharge may affect fu-
ture allocations in this por-
tion of the receiving
stream.
May 3, 2002
(4452)
MAY 1 5 2002
MAY 5 2002
DEM? - WATER QUALITY
PONT SOURCE BRANCH
Before the undersigned, a Notary Public of said
County and State, duly commissioned, qualified and
authorized by law to administer oaths, personally
appeared Darryl Rhymes who, being first duly
sworn, deposes and says: that he is the Legal
Billing Clerk of TheAsheville Citizen -Times
Company, engaged in publication of a newspaper
known as The Asheville Citizen -Times, published,
issued, and entered as second class mail in the City
of Asheville, in said County and State; that she is
authorized to make this affidavit and sworn
statement; that the notice or other legal
advertisement, a true copy of.which is attached
hereto, was published in The Asheville Citizen -
Times on the following dates: May 3, 2002, And
that the said newspaper in which said notice, paper,
document or legal advertisement were published
were, at the time of each and every publication, a
newspaper meeting all of the requirements and
qualifications of Section 1-597 of the General
Statues of North Carolina and was a qualified
newspaper within the meaning of Section 1-597 of
the General Statues of North Carolina.
Signature of pe
Sworn to
May, 2002
making dfftdavit)
d subscribe
efore me the 7th day of
(NotiPublic)
My Commission expires the 20th day of June 2005.
. �...
•.
�',yOTAR) •;fit' %
:•.PUBL\G:� .,
MBE C ,�,,`''

MAY 2 4 2002
Tennessee Valley Authority, 400 West Summit Hill Drive, Knoxville, Tennessee 37902-1401
Janet C. Herrin, P.E.
Senior Vice President
River Operations
May 22, 2002
Ms. Natalie V. Sierra
North Carolina Department of Environment
and Natural Resources
Division of Water Quality - NPDES Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Dear Ms. Sierra:
TENNESSEE VALLEY AUTHORITY (TVA) - CHATUGE HYDRO (CTH) - NPDES PERMIT
NO. NC0027332 AND HIWASSEE HYDRO (HIH) NPDES PERMIT NO. NC0027359 -
COMMENTS ON DRAFT NPDES PERMITS
TVA has reviewed the draft NPDES permits for these facilities and offers the following
comments: •
1. The draft permits require quarterly estimates of flow to be reported for March, June,
September, and December. This requirement is not practicable for unwatering operations
because of their intermittent nature. Discharges are infrequent and may occur in months
other than those specified. TVA, therefore, requests elimination of this requirement for
these outfalls.
2. The description of Outfall 001 at CTH should be revised to read "waters from the station
sump (receiving flow from floor drains, penstock -envelope leakage, and Unit 1 wheel -pit
leakage)." Also, for consistency, we request that "dewatering sump waters" be changed to
"unwatering sump waters" in Part A (2) of the CTH permit.
3. TVA requests that "Chatuga" be changed to "Chatuge" throughout the permit.
4. TVA 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 (423)
751-6844 in Chattanooga, Tennessee.
Sincerely,
c„,gbiptelvfn

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:
Hiwassee River
Regional Office:
Asheville
Stream Classification:
WS-IV, CA
State Grid / USGS Quad:
G2NW/Unaka, NC
303(d) Listed?
No
Permit Writer:
Natalie V. Sierra
Subbasin:
04-05-02
Date:
4/22/02
Drainage Area (mi2):
N/A
Summer 7Q10 (cfs)
250
$
84° 10' 44" W
Winter 7Q10 (cfs):
N/A
x
ro
35° 09' 02" N Long.
30Q2 (cfs)
N/A
Average Flow (cfs):
N/A
IWC (%):
N/A (variable flow
— not limited)Lat.
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 1998 to present. Average
flows from the five outfalls are dis.la ed below:
Outfall 001
Flow (MGD) 0.4
Outfall 002
1.1
Outfall 003
3.96
Outfall 004
0.29
Outfall 005
0.1
Correspondence
The Asheville Regional Office (ARO) did not conduct any site visits to this facility over the term
of the permit. Other than the required certification from the facility that BMPs are in place, there was no
correspondence noted from 1999 to present.
Fact Sheet
NPDES NC0027359 Renewal
Page 1.

PERMITTING STRATEGY
• Waste Load Allocation (WLA)
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 draft 2002 Hiwassee River Basinwide Water Quality Plan reports
that the receiving stream is currently supporting all designated uses and provides no recommendations
for this discharger.
Reasonable Potential Analysis (RPA)
Since toxicants are not monitored in this discharge, no reasonable potential analysis was
performed.
SUMMARY OF PROPOSED CHANGES
The Permittee has not requested any changes nor are any changes deemed necessary at this time.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice:
Permit Scheduled to Issue:
NPDES DIVISION CONTACT
April 17, 2002
June 7, 2002
If you have questions regarding any of the above information or on the attached permit, please contact
Natalie Sierra at [phone] ext. 551.
NAME: DATE:
REGIONAL OFFICE COMMENTS
NAME: DATE:
SUPERVISOR: DATE:
Fact Sheet
NPDES NC0027359 Renewal
Page 2

PERMIT NUMBER:
FACILITY NAME:
NC0027359
Hiwassee Hydro Plant
CITY: Murphy
Dec-98
Mar-99
Jun-99
Sep-99
Dec-99
Mar-00
Jun-00
JuI-00
Dec-00
Mar-01
Apr-01
Aug-01
Oct-01
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
average
0.4
Oil and
00$ pH (su) Grease (mg/L) FLOW (MGD)
Dec-98
Jun-99
Dec-99
Jun-00
Dec-00
Apr-01
Oct-01
3.96
3.96
3.96
3.96
3.96
3.96
3.96
average
3.96
005 pH Oil and Flow (MGD)
Dec-98
Mar-99
Jun-99
Sep-99
Dec-99
Mar-00
Jun-00
JuI-00
Dec-00
Mar-01
Apr-01
Aug-01
Oct-01
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
average 0.1
Oil and
002 pH (su) Grease FLOW (MGD)
Dec-98
Jan-99
Apr-99
Sep-99
Nov-99
Mar-00
Jun-00
JuI-00
Dec-00
Feb-01
May-01
Aug-01
Oct-01
1.3
1.3
2.6
1.3
1.3
0
1.3
1.3
0
1.3
1.3
1.3
0
average
1.1
Oil and
004 pH (su) Grease FLOW (MGD)
Dec-98
Jun-99
Dec-99
Jun-00
Dec-00
Apr-01
Oct-01
0.29
0.29
0.29
0.29
0.29
0.29
0.29
average 0.29

General Permit NCG500000
A(3). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FOR HYDROELECTRIC FACILITIES — SUMPS AND
DRAINS AND OTHER MISCELLANEOUS WASTEWATERS
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge waters from sumps & drains (including
powerhouse sumps & drains, wheel pit drains, head cover drains and gallery sumps & drains) and other miscellaneous wastewaters (from sumps & drains associated with
hydroelectric facilities) from outfalls numbered serially beginning with 001 (specific outfall numbers shall be assigned by the permittee). Such discharges shall be limited
and monitored by the Permittee as specified below:
CFfL lam' C'A
k r_ ..1. . � fl t .: _. ..•-t
°
w'4 j�.. f: ... ...) 4 r. .. - .. ..
t•�l, t
�,� .. +1' I
: . ,-s • i OY.:
ai !.
js �, • ": t,s::,.,
t�. �h Mjj N�.
's' : Ya " -_+.a
'J�SVI�• .. L:
i :.�VD n...l' .
- i'' L'
...,, . 's. 711 ..
.. -
Flow
Quarterly
Estimate
Effluent
Oil and Grease— see note 1
15 mg/L
20 mg/L
Quarterly
Grab
Effluent
.- is Aer Itig
Quarterly
Grab
Effluent
1: The tailrace shall be visually inspected for oil sheens when discharge occurs immediately after the lubrication of wicket gates (or other lubrication operations
which aught result in the discharge of oil and grease) at the hydroelectric facility.
2: The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units for fresh water classifications.
The pH shall not be less than 6.8 standard units nor greater than 8.5 standard units for salt water classifications.
Chemical wheel pit cleaning is permitted on a monthly basis. When cleaning of the wheel pits 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 which 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.
There shall be no chromium, zinc or copper added to the discharge except as pre -approved additives to biocidal compounds.
There shall be no discharge of floating solids or visible foam (other than trace amounts) in the effluent.
Page 4 of 14

file:///Untitlec
Kerry,
Attached are the draft permit, fact sheet and cover letter for Hiwassee Hydro Plant. Please let me know ii
you have any changes or suggestions by Monday, April 15.
Thanks,
Natalie
rat co (Ly( 17,-) --N() `3"9/6
1 of 1 3/27/02 11:53 AM

Re: NC0027359 - Hiwassee Hydro Plant
Subject: Re: NC0027359 - Hiwassee Hydro Plant
Date: Thu, 28 Mar 2002 11:21:52 -0500
From: Kerry Becker <[e-mail]>
Organization: NC DENR - Asheville Regional Office
To: Natalie Sierra <[e-mail]>
Natalie,
I went back and looked at the permit again and was confused with respect to O&G.
For sampling frequency, you noted "2" which states a visual inspection once a
quarter. With O&G limits stated in the permit, do they also sample once a quarter
as well? Kerry
Natalie Sierra wrote:
> Sorry about that - we're having some server problems this morning....
> Kerry Becker wrote:
> > Natalie:
> >
> > Can't find the attachment to your email. Kerry
> >
> > Natalie Sierra wrote:
> >
> > > Kerry,
> > > Attached are the draft permit, fact sheet and cover letter for Hiwassee
> > > Hydro Plant. Please let me know if you have any changes or suggestions
> > > by Monday, April 15.
> > > Thanks,
> > > Natalie
> > >
> > >
> > > Name: Natalie.Sierra.vcf
> > > Natalie.Sierra.vcf Type: VCard (text/x-vcard)
> > > Encoding: 7bit
> > > Description: Card for Natalie Sierra
> >
> >
> > Kerry Becker - [e-mail]
> > North Carolina Dept. of Environment and Natural Resources
> > Asheville Regional Office
> > Division of Water Quality - Water Quality Section
> > 59 Woodfin Place
> > Asheville, NC 28801
> > Tel: [phone]
> > Fax: [phone]
> >
> >
> > Name: Kerry.Becker.vcf
> > Kerry.Becker.vcf Type: VCard (text/x-vcard)
> > Encoding: 7bit
> > Description: Card for Kerry Becker
Name: NC0027359_Fact Sheet.doc
> NC0027359_Fact Sheet.doc Type: Winword File (application/msword)
> Encoding: base64
Download Status: Not downloaded with message
1 of 2
4/18/02 11:19 AM

Re: NC0027359 - Hiwassee Hydro Plant
Subject: Re: NC0027359 - Hiwassee Hydro Plant
Date: Thu, 28 Mar 2002 11:17:30 -0500
From: Kerry Becker <[e-mail]>
Organization: NC DENR - Asheville Regional Office
To: Natalie Sierra <[e-mail]>
Natalie,
It looks fine to me. I may have missed it in reading, will the BMP still be in
lieu of O&G analyses?
Kerry
Natalie Sierra wrote:
> Sorry about that - we're having some server problems this morning....
> Kerry Becker wrote:
> > Natalie:
> >
> > Can't find the attachment to your email. Kerry
> >
> > Natalie Sierra wrote:
> >
> > > Kerry,
> > > Attached are the draft permit, fact sheet and cover letter for Hiwassee
> > > Hydro Plant. Please let me know if you have any changes or suggestions
> > > by Monday, April 15.
> > > Thanks,
> >>Natalie
> > >
> > >
> > > Name: Natalie.Sierra.vcf
> > > Natalie.Sierra.vcf Type: VCard (text/x-vcard)
> > > Encoding: 7bit
> > > Description: Card for Natalie Sierra
> >
> >
> > Kerry Becker - [e-mail]
> > North Carolina Dept. of Environment and Natural Resources
> > Asheville Regional Office
> > Division of Water Quality - Water Quality Section
> > 59 Woodfin Place
> > Asheville, NC 28801
> > Tel: [phone]
> > Fax: [phone]
> >
> >
> > Name: Kerry.Becker.vcf
> > Kerry.Becker.vcf Type: VCard (text/x-vcard)
> > Encoding: 7bit
> > Description: Card for Kerry Becker
> Name: NC0027359_Fact Sheet.doc
> NC0,027359_Fact Sheet.doc Type: Winword File (application/msword)
Encoding: base64
> Download Status: Not downloaded with message
Name: NC0027359_draftcovlet.doc
> NC0027359_draftcovlet.doc Type: Winword File (application/msword)
1 of 2 4/18/02 11:19 AM

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Tennessee Valley Authority, 400 West Summit Hill Drive, Knoxville, Tennessee 37902-1401
Janet C. Herrin, P.E.
Senior Vice President
River Operations
February 22, 2002
North Carolina Department of Environment
and Natural Resources
Division of Water Quality/NPDES Unit
512 N. Salisbury Street, Suite 942
Raleigh, North Carolina 27604
Dear Sir or Madam:
.NOWN
MAR 4 2002
r.•
TENNESSEE VALLEY AUTHORITY (TVA) - CHATUGE HYDRO (CTH) - 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 and a wastewater flow schematic. Based on discussions
with Tom Belnick, it is TVA's understanding that site maps are not required. The
current permits are scheduled to expire at midnight on August 31, 2002.
Discharge sampling and analysis are not required under the current permits.
Quarterly letters certifying that best management practices (BMPs) were followed are
submitted in lieu of monitoring data. TVA requests that submission of quarterly BMP
letters be continued in the renewed permits.
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,
C.Zke301-W
et C. Herrin
Pruilod on recycled paper

UPPER
GALLERY DRAINS
LOWER
GALLERY DRAINS
UNIT 2 FLOOR DRAINS
UNIT 2 WHEEL PIT
LEAKAGE
GENERATOR AIR &
BEARING COOLING WATER
DRAFT TUBE
UNWATERING OPERATIONS
INTAKE FROM HIWASSEE RIVER
0.
STATION
SUMP
0.720 MGD
0 A
0
0.2016 MGD
0.9216 MGD
UNIT 1 2.052 MGD
.UNIT 2_._,_,_,_._._._._._._._._._,_,_10.
2.606 MGD
UNIT 1 FLOOR DRAINS
AND WHEEL PIT LEAKAGE
POTABLE WATER
(EST. MAX. 400 GPD)
SANITARY SEWAGE
DRAINS
UNWATERING
SUMP
OUTFALL
STATION
SUMP
SEPTIC
TANK
0
7.776 MGD
0.432 MGD
005
003
004
002
> 001
SUBSURFACE
DISPOSAL FIELD
SYMBOLS:
RAW RIVER WATER, POTABLE WATER, RAIN WATER, OR GROUND WATER
- • - • NON -CONTACT COOLING WATER
OTHER WASTEWATER
0 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
FEBRUARY 2002

NPDES PERMIT APPLICATION - SHORT FORM C
For manufacturing or commercial facilities with a discharge <1 MGD (or WTPs)
N. C. Department of Environment and Natural Resources
Division of Water Quality / NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
North Carolina NPDES Permit Number
Please print or type
1. Applicant and facility producing discharge
NCOO 27359
A. Name Tennessee Valley Authority - Hiwassee Hydro Plant
B. Mailing address of applicant:
Street address 400 West Summit Hill Drive
City Knoxville County Knox
State Tennessee Zip Code 37902
Telephone Number
Fax Number
e-mail address
( 865 ) 632-6770
( 865) 632-6137
jcherrin(tva.00v
C. Location of facility:
Street 600 Powerhouse Road
City near Murphy County Cherokee
State North Carolina Zip Code 28906
Telephone Number (423 ) 825-3008
2. Standard Industrial Classification (SIC) code(s): 4911 - Electric Services
3. Number of employees: 25
4. Principal product(s) produced: Electric Power
Principal raw material(s) consumed: N/A
5. Principal process(es): Hydraulic Turbine -Generator
6. Amount of principal product produced or raw material consumed
List specific amounts consumed and/or units of production
-117
Lon
120
-ta
Product Produced or Raw Material Consumed
(AVERAGE)
Product Produced or Raw Material Consumed
(PEAK)
per Day
1,000 megawatt -hours per day
2,904 megawatt -hours per day
per Month
per Year
7. Check here if discharge occurs all year , or
Circle the month(s) in which discharge occurs:
January February March April
May June July August September October November December
Days per week discharge occurs: 7
NOTE: If the facility has separate discharge points (outfalls) or multiple industrial processes, include a schematic diagram of
wastewater flow at the facility.
Page 1 of 2
Version -6-99

NPDES PERMIT APPLICATION - SHORT FORM C
For manufacturing or commercial facilities with a discharge <1 MGD (or WTPs)
(NC0027359)
8. Types of wastewater discharged to surface waters only (check as applicable).
Discharge per operating day
Flow*
(GALLONS PER OPERATING DAY)
Volume treated before discharging
(PERCENT)
Sanitary - daily average
250 (estimated)
N/A (subsurface disposal)
Cooling water, etc. - daily average
4,250,000
0%
Process water - daily average
1,700,000 (Outfall 001 - Station
Sump = 400,000 and Outfall 002 -
Unwatering Sump = 1,300,000)
100% - Oil absorbent pads are
used in sumps & points of
equipment oil leaks
Maximum per operating day for
total discharge (all types)
13,788,000
66% - Oil absorbent pads are used
in sumps & points of equipment oil
leaks
Note: Average flows are estimated for typical operating conditions. Unwatering operations (Outfall 002) are intermittent and typically occur
approximately once every two years per unit. See attached flow schematic for maximum flow rates.
9. If any of the types of wastewater identified in item 8 (either treated or untreated) are discharged to places
other than surface waters, record the amount(s) discharged below:
A. Municipal sewer system gpd
B. Underground well gpd
C. Septic tank 250 est. average and 400 est. maximum gpd
D. Evaporation lagoon or pond gpd
E. Other, specify gpd
10. Number of separate discharge points: 5
11. Name of receiving stream(s): Hiwassee River
12. Does your discharge contain or is it possible for your discharge to contain one or more of the following
substances added as a result of your operations, activities, or processes? Circle all that apply:
aluminum ammonia beryllium cadmium chromium chlorine (residual) (Outfalls 001,
002, & 005 only)
copper cyanide lead mercury nickel oil and grease
phenols selenium zinc None of the above
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
Senior Vice President, River Operations
Printed name of Person Signing Title
C...Nresetstow%
of Applicant D e
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 $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.)
Page 2 of 2 Version -6-99

Re: FW: TVA Hiwassee Hydro Plant - Cherokee County - NPDES Permit No.NC0027359
Subject: Re: FW: TVA Hiwassee Hydro Plant - Cherokee County - NPDES Permit No.NC0027359
Date: Tue, 02 Oct 2001 15:40:29 -0400
From: Tom Belnick <[e-mail]>
To: "Stiefel, Mike" <[e-mail]>
CC: Kerry Becker <[e-mail]>
The Division concurs with the proposed non -chemical mechanical cleaning at
0utfalls 003 and 004 over an approximately two day period.
"Stiefel, Mike" wrote:
> Mr. Belnick:
> Have you received any feedback on this yet?
> Thanks,
> Mike Stiefel
> > Original Message
> > From: Stiefel, Mike
> > Sent: Thursday, September 27, 2001 4:20 PM
> > To: '[e-mail]'
> > Cc: Tupps, Melissa S.
> > Subject: TVA Hiwassee Hydro Plant - Cherokee County - NPDES Permit
> > No. NC0027359
> >
> > Mr. Belnick:
> >
> > Per our telephone conversation of this afternoon, I am submitting a brief
> > description of a proposed maintenance activity at Hiwassee Hydro Plant and
> > requesting your review and concurrence for proceeding. TVA would like to
> > begin this operation within the next few days if possible.
> >
> > Outfalls 003 and 004 at the subject facility consist of once -through,
> > noncontact cooling water (raw river water) used to remove waste heat from
> > the generator air coolers and bearing coolers. No chemical additives are
> > used in these cooling systems. TVA would like to mechanically clean
> > (scrape) the inside of the cooling water inlet and discharge piping to
> > remove accumulated sediment deposits. The material would be periodically
> > flowing to the tailrace with approximately 6-12 gpm of river water over a
> > period of approximately one to two days. Because the inlet and outlet
> > piping is submerged, there are no practical alternatives.
> >
> > Thank you for your consideration of this request.
> > Mike Stiefel
> > Environmental Affairs
> > LP 5D -C
> > 423-751-6844
> > Pager 800-283-0028, ID#9484
> >
Mailto:[e-mail]
N.0 DENR-DWQ/NPDES Unit
1617 Mail Service Center, Raleigh NC 27699-1617
Work: [phone] ext. 543
Fax: [phone]
1 of 2 10/2/01 3:41 PM

Re: [Fwd: TVA Hiwassee Hydro Plant - Cherokee County - NPDES Permit No. NC0027359]
Subject:
Date:
From:
Organization:
To:
Re: [Fwd: TVA Hiwassee Hydro Plant - Cherokee County - NPDES Permit No.
NC0027359]
Fri, 28 Sep 2001 09:52:02 -0400
Kerry Becker <[e-mail]>
NC DENR - Asheville Regional Office
Tom Belnick <[e-mail]>
Tom:
I don't anticipate any problems. Ker
Tom Belnick wrote:
Hi Kerry- Let me know if the Region
Thanks.
L' f t4' )
. d dtet kd to `` 0 (Alan
1e PAD C /1 C ✓Y
has any concerns with this request.
Mailto:[e-mail]
N.0 DENR-DWQ/NPDES Unit
1617 Mail Service Center, Raleigh NC 27699-1617
Work: [phone] ext. 543
Fax: [phone]
Subject: TVA Hiwassee Hydro Plant - Cherokee County - NPDES Permit No. NCO
027359
Date: Thu, 27 Sep 2001 16:19:31 -0400
From: "Stiefel, Mike" <[e-mail]>
To: "'[e-mail]'" <[e-mail]>
CC: "Tupps, Melissa S." <[e-mail]>
Mr. Belnick:
Per our telephone conversation of this afternoon, I am submitting a brief
description of a proposed maintenance activity at Hiwassee Hydro Plant and
requesting your review and concurrence for proceeding. TVA would like to
begin this operation within the next few days if possible.
Outfalls 003 and 004 at the subject facility consist of once -through,
> noncontact cooling water (raw river water) used to remove waste heat from
> the generator air coolers and bearing coolers. No chemical additives are
> used in these cooling systems. TVA would like to mechanically clean
> (scrape) the inside of the cooling water inlet and discharge piping to
> remove accumulated sediment deposits. The material would be periodically
> flowing to the tailrace with approximately 6-12 gpm of river water over a
> period of approximately one to two days. Because the inlet and outlet
> piping is submerged, there are no practical alternatives.
> Thank you for your consideration of this request.
>
> Mike Stiefel
> Environmental Affairs
> LP 5D -C
> 423-751-6844
> Pager 800-283-0028, ID#9484
Kerry Becker - [e-mail]
North Carolina Dept. of Environment and Natural Resources
Asheville Regional Office
1 of 2 9/28/01 10:14 AM

der
Tennessee Valley Authority, 400 West Summit Hill Drive, Knoxville, Tennessee 37902-1499
Janet C. Herrin, P.E.
Vice President
River Operations
January 11, 2000
Mr. Robert N. Rosen
Emergency Response and Removal Branch
U. S. Environmental Protection Agency Region IV
61 Forsyth Street
Atlanta, Georgia 30303-8960
References: 1. Letter from Janet K. Watts to Myron D. Lair (June 1, 1998, TVA EDMS No.
A60980529 191)
2. Letter from Bob N. Rosen to Janet K. Watts (September 28, 1998, EPA No.
4WD-ERR.B)
Dear Mr. Rosen:
TENNESSEE VALLEY AUTHORITY (TVA) - HIWASSEE HYDRO PLANT (HIH) - OIL SPILL
REPORTING
Per your recent discussion with Greg Marcus, TVA Environmental Affairs, the schedule has been
revised for completion of the installation of secondary containment for Hiwassee Hydro Plant
switchyard, as described in the June 1, 1998, letter referenced above. The new completion date is
September 30, 2001. This letter is respectfully submitted to you in accordance with your September
1998 request for notification of any schedule revision.
If you have questions, please call Greg Marcus at [phone].
Sincerely,
G
anet C. Herrin
cc: Ms. Bethan A. B • 1
Environmental Engineer, NPDES Unit
Department of Environment and Natural Resources
P. O. Box 29535
Raleigh, North Carolina 27626-0535
Mr. Forrest Westall
Asheville Regional Office Water Quality Supervisor
Department of Environment and Natural Resources
Interchange Building
59 Woodsin Place
Asheville, North Carolina 28801