NC0027332_Permit (Issuance)_20020624

NPDES DOCIMENT !;CANNING COVER SHEET
NPDES Permit:
NC0027332
Chatuge 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:
June 24, 2002
This document is printed on reuse paper - ignore any
content on the re'rerse side

OF WA7
°( I imp
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 24, 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 NC0027332
Chatuge Hydro Plant
Clay 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 23, 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
[phone], extension 551.
Sincerely,
Original signed 8y
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 Files
Central Files
AIM
North Carolina Division of Water Quality [phone] NCDENR
1617 Mail Service Center FAX [phone] CustamerService
Raleigh, North Carolina 27699-1617 On the Internet at htto://h2o.enr.state.nc.us/ 1 800 623-7748

Permit NC0027332
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
Chatuge Hydro Plant
at the Chatuge Dam
southeast of Hayesville
Clay 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 24, 2002.
Original Signed By
©avid A. Goodrich
Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0027332
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, penstock envelope leakage, and power house floor drains
(Outfall 001), discharge unwatering sump water (Outfall 002), and discharge
non -contact cooling water (Outfall 003), located at Chatuge Hydro Plant, at
the Chatuge Dam, near Hayesville, Clay 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.

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?SMCR 5
• \
Chatuge Hydro Plant
Tennessee Valley Authority
Chatuge Hydro Plant
State Grid/Quad: G3SE /Hayesville, NC Drainage Basin: Hiwassee River Basin
Latitude: 35° 01' 09" N Sub -Basin: 04-05-01
Longitude: 83° 47' 30" W
Receiving Stream: Hiwassee River
Stream Class: C
Outfalls 001-003
North
NPDES Permit No. NC00
Cherokee County

Permit NC0027332
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 floor
drains, penstock -envelope leakage and Unit 1 wheel pit leakage) from outfall(s) serial number
001. Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT
LIMITS
MONITORING REQUIREMENTS
CHARACTERISTICS
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 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 NC0027332
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 unwatering sump waters from outfall(s) serial number 002.
Such discharges shall be limited and monitored by the Permittee as specified below:
LIMITS
MONITORING REQUIREMENTS
EFFLUENT
CHARACTERISTICS
•
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
. Type
Sample
Locations
Flow
Quarterly
Estimate
E
Oil and Grease2
15 mg/1
20 mg/1
2
E
pH3
E
Notes:
i 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 rr cor ded 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 Boating solids or visible foam (other than trace amounts) in
the effluent.

Permit NC0027332
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 serial number 003. 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 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 30th day following the
completed reporting period. The first DMR is due on the 30dt 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.
A. (4.) 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 and 002 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.

Clay County Progress
Located at Moore's Plaza
P. O. Box 483
Hayesville, NC 28904
PUBLIC NOTICE
STATE OF NORTH
CAROLINA
ENVIRONMENTAL MANAGE-
MENT 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
Management Commission
proposes to issue a National
Pollutant Discharge Elimina-
tion System (NPDES) was-
tewater discharge permit to
the person(s) listed below ef-
fective 45 days from the
publish date of this notice.
Written comments regarding
the proposed permit will be
accepted until 30 days after
s 1.14 n. rv1tln
comments and/or requests for
information to the NC Division
of Water Quality at the above
address or call Ms. Christie
Jackson at [phone], ex-
tension 538. Please include
the NPDES permit number (at-
tached) in any communica-
tion. Interested persons may
also visit the Division of Water
Quality at 512 N. Salisbury
Street, Raleigh, NC 27604-1148
between the hours of 8:00 a.m.
and 5:00 p.m. to review infor-
mation on file.
NPDES Permit Number
NC0027332, Tennessee Valley
Authority - Chatuga Hydro
Plant, 400 West Summit Hill
Drive, Knoxville, TN 37902 has
applied for a permit renewal
for a facility located in Clay
County discharging treated
wastewater into Hiwassee
River in the Hiwassee River
Basin. Currently no
parameters are water quality
limited. This discharge may af-
fect future allocations In this
portion of the receiving
stream.
s,s
MAY 3 4 1�
- i:'TE? DUALITY
Fu• :T SOC:CE BRA:ZH
[phone]
[phone]
Form prepared by William C. Lassitor, General Counsel for North Carolina
Press Association. Approved by the Attorney General of North Carolina.
AFFIDAVIT OF PUBLICATION
CLAY COUNTY
NORTH CAROLINA
Before the undersigned, a Notary Public of said County and State, duly
commissioned, qualified, and authorized by law to administer oaths, person-
ally appeared
who being sworn, deposes and says that he/she is
(\ \b\ Q .
(owner, publisher or employee authorized to make this affidavit).
engaged in the publication of a newspaper known as the Clay County
Progress, published, issued and entered as second class mail in the City of
Hayesville, said County and State; that he/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 Clay County
Progress on the following dates: k��.,\
and that said newspaper in which such notice, paper, document, or legal
advertisement was published, at the time of each and every publication, a
newpaper meeting all 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 Statutes of North Carolina.
This \\4 day of `�� � ,
20t
(signature of person making affidavit
Sworn to and subspribed before me this, LP day of Met- y ,
Notary Public
My Commission Expires:
(seal)
Notary Public, Clay County, North Carolina
My Commission Expires Nov. 2fl. 2n94

pi-1-71-4-'1
iii)iMAY 2 4 2002
Tennessee Valley Authority, 400 West Summit Hill Drive, Knoxville, Tennessee 37902-1401
- �'i - 0U'ifrr
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,
t C. Herrin
Panted on recycled paper

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0027332
Facility Information
Applicant/Facility Name:
Tennessee Valley Authority — Chatuga Hydro Plant
Applicant Address:
400 West Summit Hill Drive; Knoxville, TN 37902
Facility Address:
Chatuga Dam Road; near Hayesville, NC 37902
Permitted Flow
Not limited
Type of Waste:
100% industrial; SIC: 4911 Primary: 48
Facility/Permit Status:
Class I /Active; Renewal
County:
Clay County
Miscellaneous
Receiving Stream:
Hiwassee River
Regional Office:
Asheville
Stream Classification:
WS-IV CA
State Grid / USGS Quad:
G3SE/Hayesville,NC
303(d) Listed?
No
Permit Writer:
Natalie V. Sierra
Subbasin:
04-05-01
Date:
4/25/02
Drainage Area (mi2):
N/A
•
'
83° 47' 30" W
Summer 7Q10 (cfs)
86
r.
Lat. 35° 01' 09" N Long.
Winter 7Q10 (cfs):
N/A
30Q2 (cfs)
N/A
Average Flow (cfs):
N/A
IWC (%):
N/A (variable flow
— not limited)
BACKGROUND
The Chatuga Hydro Plant produces electricity via hydraulic turbine generation. The facility
produces an average of 60 megawatt -hours per day of power, with peak power generation at 216
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 unwatering sump
003: once through cooling water
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 04-05-01 (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
Outfall 002
Outfall 003
Flow (MGD) 0.36 0.0 0.648
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 1998 to present.
Fat Sheet
NPDES NC0027332 Renewal
Page 1

The 1998 staff report from ARO indicates that the facility qualifies for a general permit. The
Permittee has historically requested an individual permit since such a permit would allow for
implementation of BMPs.
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. A special condition will be added requesting that the Permittee
take four samples at 001 and 002 for oil and grease and pH to determine whether or not the discharge is having
any impact on the receiving stream. These samples should be spaced out over the life of the permit.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice:
Permit Scheduled to Issue:
NPDES DIVISION CONTACT
May 1, 2002
June 21, 2002
If you have questions regarding any of the above information or on the attached permit, please contact
Natalie Sierra at (,919) 733-5083 extr
NAME:
REGIONAL OFFICE COMMENTS
DATE: T 16'' l
NAME: DATE:
SUPERVISOR: DATE:
Fact Sheet
NPDES NC0027332 Renewal
Page 2

Chatuga Hydro Plant - NC0027332
Clay County
DMR data 1998-2001
by: Natalie Sierra, 4/23/02
Outfall 001
Date
Flow
Dec-98
0.36
Mar-99
0.36
Jun-99
0.36
Sep-99
0.36
Dec-99
0.36
Mar-00
0.36
Jun-00
0.36
Jul-00
0.36
Dec-00
0.36
Mar-01
0.36
Apr-01
0.36
Jul-01
0.36
Oct-01
0.36
Average
0.36
Outfall 002
Date
Flow
Dec-98
0
Mar-99
0
Jun-99
0
Sep-99
0
Dec-99
0
Mar-00
0
Jun-00
0
JuI-00
0
Dec-00
0
Mar-01
0
Apr-01
0
Oct-01
0
Average
0
Outfall 003
Date
Flow
Dec-98
0.648
Mar-99
0.648
Jun-99
0.648
Dec-99
0.648
Jun-00
0.648
Dec-00
0.648
Apr-01
0.648
Oct-01
0.648
Average
0.648

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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:
71!) R 11 F1;1
1 (Il
MAR - 4 2002
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,
et C. Herrin
Printed co recycled paper

GENERATOR AIR AND
BEARING COOLING WATER
DRAFT TUBE
UNWATERING OPERATIONS
INTAKE FROM HIWASSEE RIVER
POWERHOUSE FLOOR
DRAINS AND PENSTOCK
ENVELOPE LEAKAGE
WHEEL PIT LEAKAGE
UNIT 1
POTABLE WATER
(NORMALLY ZERO
EST. 200 GPD MAX.)
SANITARY SEWAGE
DRAINS
UNWATERING
SUMP
OUTFALL
2.088 MGD
- • - • - • - • - • - • - • - • * 003
STATION
SUMP
10.
SEPTIC
TANK
7.2 MGD
0 0.75 MGD
0
SUBSURFACE
DISPOSAL FIELD
SYMBOLS:
RAW RIVER WATER, POTABLE WATER, RAIN WATER, OR GROUND WATER
- . - • NON -CONTACT COOLING WATER
OTHER WASTEWATER
0 MOTOR -DRIVEN PUMP
NOTES:
1. ALL EFFLUENTS DISCHARGE INTO THE HIWASSEE RIVER
2. FLOWS (OTHER THAN FOR SANITARY WASTES) ARE MAXIMUM RATES
AND ARE BASED ON PUMP RATED CAPACITIES OR MAXIMUM DESIGN
FLOW RATES.
3. THE SANITARY WASTE FLOW IS NORMALLY ZERO. THE FLOW SHOWN
IS AN ESTIMATED MAXIMUM.
4. UNWATERING OPERATIONS (OUTFALL 002) OCCUR APPROXIMATELY
ONCE EVERY TWO YEARS.
002
001
TVA
CHATUGE HYDRO PLANT
NPDES PERMIT NO. NC0027332
CLAY COUNTY, NC
FEBRUARY 2002