HomeMy WebLinkAboutHaywood Co. Walters Hydroelectric ProjectD
,_AEtoRATORY SECTION
Ms. Magalie R. Salas, Secretary
Federal Energy Regulatory Commission
888 1st Street, NE
Washington, DC 20426
FED 19 2014
A g $ o 2 p a.
February 9, 2004
Subject: Walters Hydroelectric Project No. 432
Article 403 — Annual Report on 2003 Lake Level Elevation
Dear Ms. Salas:
The purpose of this letter is to file the lake level elevations report for the previous year as
required by Article 403 of our license. Attached are an original and eight copies of a
graph depicting the hourly lake elevations for the calendar year 2003 at the Walters
Hydroelectric Project No. 432. The lake level elevation remained above the required
minimum elevation for the entire year of 2003. As required by article 403, we are also
providing copies of this filing to the North Carolina Department of Environment, Health
and Natural Resources (NCDEHNR) and Tennessee Wildlife Resources Agency
(TWRA).
If you have any questions regarding this matter, please call Max Gardner at 910-439-5211
x-1205.
Sincerely, �Q
/::V�
Garry A. Whisnant, P.E.
Manager, Hydro operations
Enclosure
cc: Mr. A. D. McKinney, TWRA (w/attachment)
Mr.-S.- W.. Tedder, NCDEHNR_(w%attachment)
D
Progress Energy Carolinas, Inc.
Tillery Hydro Plant FEB 2 3 tool
179 Tillery Dam Road
Mount Gilead, NC 27306 IWI
22650
22600
22550
22500
22450
22400
22350
22300
22250
22200
22150
Walters Hourly Lake Elevation
First Quarter
January - March 2003
Page 1
Elevation
—� -Minimum Elevation
22700
22600
22500
22400
22300
22200
22100
22000
Walters Hourly Lake Elevation
Second Quarter
April - June 2003
Page 1
Elevation
Minimum Elevation
22600
22550
22500
22450
22400
22350
22300
22250
22200
22150
Walters Hourly Lake Elevation
Third Quarter
July - September 2003
Page 1
Elevation
Minimum Elevation
22650
22600
22550
22500
22450
22400
22350
22300
22250
22200
22150
Walters Hourly Lake Elevation
Fourth Quarter
October - December 2003
Page 1
Elevation
�- Minimum Elevation
Progress Energy.
a
Magalie Roman Salas, Secretary
Federal Energy Regulatory Commission
888 First Street N.E.
6
Washington, D.C.' 20426
Subject: Walters Hydroelectric Project No. 432
License Article No. 409
Dear Ms. Salas:
April 14, 2003
MAY^62003�
As required by Article 409 of the operating license for Progess Energy's Walters
Hydroelectric Project, please find enclosed an original and eight copies of the report, "Dioxin and
Furan Concentrations in the Axial Muscle of Fish from Walters Lake, November 2002". This
report is required to be submitted to the Commission, the North Carolina Department of Health
and Human Services, Division of Public Health, and the North Carolina Division of Water
Quality by April 15"' of each year. Additionally, Article 409 requires CP&L to submit to the
Commission the dioxin monitoring report prepared each year by Blue Ridge Paper Products, Inc.
with respect to the project reservoir. Blue Ridge Paper Products currently owns the Canton,
North Carolina, paper mill that was formerly owned and operated by Champion International
Corporation prior to 1999. An original and eight copies of that report, "Results of 2002 Dioxin
Monitoring in Fish Tissue", dated January 2003, are enclosed.
The 2002 data continued to indicate favorable declining trends in dioxin concentrations of
the major target species', common carp, in Walters Lake since sampling began in 1988.
Currently, common carp in Walters Lake is the only species listed on the fish consumption
advisory for the Pigeon River in North Carolina. Channel catfish and flathead catfish, species
removed from the fish consumption advisory in August 2001, continued to have very low dioxin
concentrations in muscle tissue (< 1 pg/g).
Another favorable trend that occurred during early January 2003 was the total recession
of the fish consumption advisory for fish in the Tennessee waters of the Pigeon River' 2. The
State of Tennessee rescinded the remaining species —common carp, catfish, and redbreast
sunfish —for the Pigeon River from below the Walters Hydroelectric Plant to Douglas Reservoir,
Tennessee. Recession of this advisory provided further evidence that the Pigeon River and
Walters Lake are recovering from earlier inputs of dioxin from the upstream paper mill.
Progress Energy Carolinas, Inc.
Tillery Hydro Plant
179 Tillery Dam Road
Mount Gilead, NC 27306
Secretary i 2 April 14, 2003
"Additionally, the recession of the advisory also provided evidence that natural sedimentation
capping of Walters Lake sediments has been effective in preventing further downstream dioxin
contamination of the aquatic community.
If you have any questions, please contact Mr. Max Gardner at (910) 439-5211, extension
1205.
Sincerely,
Mr. Garry Whisnant, Manager
Hydro Operations"
GW/juc
Enclosures
c: Mr. S. Cline (NCDHHS)
Mr. M. J. Gardner (Progress Energy)
Mr. A. D. McKinney (TWRA)
Ms. P. F. MacPherson (NCDWQ)
Ms. C. Sullins (NCDWQ)
Dr. L. K. Williams (NCDHHS)
Ms. P. Q. West (Progress Energy)
'Denton, G. M., and D. H. Arnwine. 2002. Dioxin levels in Pigeon River fish 1996-2002.
.October 2002. Tennessee Department of Environment and Conservation, Division of .
Water Pollution Control, Nashville, TN.
2Simmons, M. 2003. Warnings about eating fish removed from the Pigeon River. Knoxville
News Sentinel. January 7, 2003 edition.
4.
Progress Energllll
Progress Energy
Walters Hydro Plant
1251 Waterville Road 1
Newport, TN 37821
9����
� ,,AIq 1.4 205
January 8, 2003
Ms. Lois D. Cashell, Secretary LABORA OR� EGTION
Federal Energy Regulatory Commission
Mail Code: DPCA, HL 21.3
888 1st Street, NE
Washington, DC 20426 -
j
Subject: Walters Hydroelectric Project No. 432 AN
Article 403 — Annual Report on 2002 Lake Level Elevation
Dear Ms. Cashell:
The purpose of this letter is to file the lake level elevation report for the previous year as
required by Article 403 of our license. Attached are an original and eight copies of a
graph depicting the midnight lake elevations for the calendar year 2002 at the Walters
Hydroelectric Project No. 432. As required by article 403, we are also providing copies of
this filing to the North Carolina Department of Environment, Health and Natural
Resources (NCDEHNR) and Tennessee Wildlife Resources Agency (TWRA).
If you have any questions regarding this matter, please call Max Gardner at 910-439-5211
x-1205.
Sincerely,
B ey, PE
Manager — Hydro operations
MJG/jhb
Attachments
cc: Mr. A. D. McKinney, TWRA (w/attachment)
2260.0
2255.0
2250.0
c
0
�o
w 2245.0
L
M/
2240.0
2235.0
2230.0
Walters 2002 Midnight Lake Level Elevations -1st Quarter
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Date
Jan
Feb
March
2260.0
2258.0
2256.0
2254.0
2252.0
fA
C
O
2250.0
m
w
2248.0
Y
RS
J
2246.0
2244.0
2242.0
2240.0
2238.0
Walters 2002 Midnight Lake Level Elevations - 2nd Quarter
1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Date
April
May
June
2260.0
2255.0
2250.0
2245.0
Ul
C
O
2240.0
w
N
.Y
W
J
2235.0
2230.0
2225.0
2220.0
Walters 2002 Midnight Lake Elevations - 3rd Quarter
1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Date
July
August
September
ZZOW
2258.(
2256.(
2254.(
N 2252.(
c
0
a
d 2250.(
w
d
Y
-�� 2248.(
2246.(
2244.(
2242.(
2240.(
Walters 2002 Midnight Lake Elevations - 4th Quarter
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Date
October
November
December
CP&L
A Progress Energy Company
Secretary
Federal Energy Regulatory Commission
Mail Code: DPCA, HL-21.1
888 First Street, NE
Washington, D.C. 20426
SUBJECT: Walters Hydroelectric Project - FERC Project No. 432
License Article 405: Dissolved Oxygen Monitoring
Dear Secretary:
August 27, 2002
AUG 20;,
I am providing this letter to inform you that dissolved oxygen (DO) levels in the Pigeon River
below the Walters Powerhouse apparently declined below 5.0 milligrams per liter (mg/L) for brief and
minor incidents on August 13 and 17, 2002. The incidents were noted from our review of provisional
data (subject to revision) measured at the USGS gaging station below the Walters Powerhouse. Data is
recorded at 15-minute intervals at this USGS gaging station. The provisional data shows one 15-minute
interval reading of 4.4 mg/L, one at 4.5 mg/L and one reading of 4.6 mg/L. Nine other 15-minute
interval readings were recorded in the 4.8 — 4.9 mg/L range.
This information is being provided in accordance with the Walters License Article 405, as
supplemented by the FERC Order dated January 29, 1996 for Project No. 432-016. The incidents were
verbally reported to: Mr. William Ross, FERC-Atlanta; Mr. David McKinney, Tennessee Wildlife
Resources Agency (TWRA); Mr. Steve Reed, North Carolina Division of Water Resources (NCDWR);
Mr. Forrest Westall, North Carolina Division of Water Quality (NCDWQ); and Mr. Bob Fletcher, FERC-
Washington. No comments have been received as of the date of this letter.
These excursions coincided with recreational flow releases and occurred at the end of the flow
release period when decreased water turbulence resulted in brief sags.in DO levels below 5.0 mg/L. The
USGS data indicated that these excursions are brief in nature, lasting no more than 1- 2 hours, with
declines less than 1.0 mg/L below 5.0 mg/L threshold. Additionally, these excursions were only noted in
the quieter pool habitat where the USGS gage is located. As observed by recent CP&L environmental
monitoring after a release event, DO concentrations remained above 5.0 mg/L in rapid/riffle habitat
located above and below the gaging station after plant shutdown. Rapids located immediately below the
gaging station pool provide additional aeration and generally increase DO levels on the order of 0.2 to 1.9
mg/L. The minor deviations of dissolved oxygen below the 5.0 mg/l threshold given in the FERC Order
are well within the known short-term tolerance limits of aquatic life. No adverse environmental impacts
were observed or reported resulting from the incidents described in this letter.
However, CP&L has institutedtemporary measures in plant ramping rates during the remainder of
the season of recreational flow releases in an attempt to prevent these short-term excursions in DO levels
below 5.0 mg/L. CP&L will also continue to monitor dissolved oxygen data on a regular basis with the
goal of quickly identifying any variances of this nature in the future.
Tillery Hydro Plant
179 Tillery Dam Road
Mt. Gilead, NC 27306
V
Data Catego : Geo ra hic Area: _
skip navigation Real-time r
Water Resources North Carolina - GC
USGS 03460795 PIGEON R PL POWER PLANT NR
WATERVILLE, NC
PROVISIONAL DATA SUBJECT TO REVISION
Available data for this site Real-time _ T< p
This station is operated in cooperation with Carolina Power and Light (CP&L).
Water -quality data collected seasonally from June to September.
Wailable Parameters Output format
All 5 parameters available at this site Table
00065 GAGE HEIGHT (DD 01) ---
00060 DISCHARGE (DD 02)
00010 WATER TEMPERATURE (DD 12)
TIME Aug 12 Aug 13 Aug 14 Aug 15 Aug 16 Aug 17 Aug 18 Aug 19
00:15
5.8
5.6
5.3
5.8
5.8
5.8
5.3
5.5
00:30
5.8
5.7
5.3
5.8
5.9
5.8
5.4
5.5
00:45
5.8
5.7
5.3
5.8
5.9
5.8
5.4
5.6
01:00
5.8
5.8
5.3
5.7
5.9
5.7
5.4
5.5
0 1:15
5.9
5.8
5.3
5.7
5.9
5.7
5.3
5.6
01:30
5.9
5.8
5.3
5.8
5.9
5.7
5.3
5.5
01:45
5.9
5.8
5.3
5.8
5.9
5.7
5.3
5.5
02:00
5.7
5.7
5.3
5.8
5.9
5.7
5.3
5.5
02:15
5.9
5.7
5.3
5.8
5.9
5.7
5.3
5.5
02:30
5.8
5.7
5.3
5.8
5.9
5.7
5.4
5.5
02:45
5.9
5.7
5.3
5.9
5.9
5.7
5.4
5.5
03:00
5.8
5.8
5.3
5.9
5.9
5.7
5.4
5.5
03:15
5.8
5.9
5.3
5.9
5.9
5.7
5.4
5.5
03:30
5.8
5.8
5.2
5.9
5.9
5.7
5.4
5.5
03:45
5.7
5.8
5.3
5.9
5.8
5.6
5.4
5.5
04:00
5.6
5.8
5.3
5.9
5.8
5.7
5.4
5.5
04:15
5.8
5.7
5.2
5.9
5.8
5.6
5.4
5.4
04:30
5.7
5.8
5.3
5.9
5.8
5.5
5.4
5.4
04:45
5.6
5.8
5.3
5.9
5.8
5.5
5.4
5.5
05:00
5.7
5.9
5.3
5.8
5.8
5.6
5.4
5.4
http://nc.waterdata.usgs.gov/n.../uv?dd_cd=13&format=html&period=7&site_no=0346079 08/19/2002
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WALTERS/MARSHALL OPERATION SHIFT LOG
Daily Shift Log
Day/Date: 06:00 08/12/02 Thru 06:00 08/13/02
OPERATOR: 06:00-18:00 Joe Parkins
18:00-06:00 Elvine Coggins
Operator Workaround Items
Walters Plant
Walters unit 1 clearance on governor oil pump C/O #00038560 (6-14-02)
Walters unit 3 has the Cutler/Hammer test voltage regulator installed. (Troy Reynolds home Phone: 919-269-
4541, pager 919-981-3637) (Richard Mummert, Cutler/Hammer Home phone: 828-891-9372, Office: 828-687-
3123.
If the computer on the control room desk comes up in the "Safe Mode" again call Bill Talburt or Mike Gailey first
so they can find out if the "Black Box" is causing the trouble. Bill's Ph. # 350-5232 & Mike's Ph # 340-4391
Use unit 2 for minimum flow, units 2-3 for rafting & unit 1 if absolutely needed.
ALL OPERATORS: CALL THE DISPATCHER AT 18:15 AND GET HIM TO BACK OFF THE LOAD TO
CONSERVE WATER AS LONG AS THE INFLOW RATE IS AS LOW AS IT IS.
Walters Dam cameras are out of service.
Walters can be generated at 60 MW's if requested to run at 1000 cfs. 16:25 on 08-12-02.
Marshall Plant
Marshall unit 1 Off -line -Hydro Clearance # 23-2000. Speed Increaser & Generator Clearance # 04-2001 for re-
installing speed increaser.
Marshall generation load is around 50 kw more at 1000 kw & 150 to 200 kw more at 2000 kw than shows on our
Marshall data at Walters.
Marshall unit 2 voltage is around 800 more at Walters than at Marshall.
Marshall trash rake is on stop —just hit start when needed. 08:30 on 08-09-02
LAKE LEVELS: Full Pond 06:00 18:00 06:00
Walters: 2258.6 2234.8 2234.9 2234.9
Marshall: 1622.0 1622.4 1622.4 1622.4
06:00 Conditions: Unit 2 is generating. Units 1 and 3 are retired. Marshall unit 1 is under clearance and unit 2
is retired due to low river flow. Relieved by Joe Parkins.
06:25 Oil levels, relay targets, voltmeters, & sync ok, tested panalarm.
06:45 Voith crew on site at Walters.
07:00 Robert Mathews & crew on site at Walters.
07:45 Bruce Medford and Denny Hampton went to Walters Dam to do walk down.
08:00 Issued Voith Siemens Hydro a "Hot Work" permit on Walters units 1 & 2 TIV pits.
08:10 Plant checked ok.
09:15 BellSouth on site at Walters.
09:15 Blue Ridge Paper on & off site at Walters.
11:40 Plant checked ok.
12:00 N.C. Biologists on site at Walters Dam to sample lake water.
11:40 Dean West and Randall Arrowood checked Walters service water screen debris drain valve and found the
seal out. Lost air cooler pumps for a few minutes while the valve was open.
13:35 The Plant air cooler pumps were turned off to see how long the generator would run before the high
temperature alarm would come on:
14:30 N.C. Biologists off site at Walters Dam.
14:45 Air cooler pumps back on.
15:00 Plant checked ok.
MyD... C,,,n IRonn Opl.ogl�o ,d, �
18:00 Conditions: Unit 2 is generating. Units 1 and 3 are retired. Marshall unit 1 is under clearance and unit 2
is retired due to low river flow. Relieved by Joe Parkins.
18:10 Oil levels, relay targets, voltmeters, and sync ok. Panalarm tested. No alarms.
19:29 Dam Trouble Alarm. It cleared and nothing showed on the PanelView 1000.
22:00 The plant checked ok.
24:00 Conditions: Unit 2 is generating. Units 1 and 3 are retired. Marshall unit 1 is under clearance and unit 2
is retired due to low river flow.
02:00 The plant checked ok.
04:40 A ground showed up on the DC.
05:00 The plant checked ok.
06:00 Conditions: Unit 2 is generating. Units 1 and 3 are retired. Marshall unit 1 is under clearance and unit 2
is retired due to low river flow. Ground on the DC. Relieved by Nease Leatherwood.
MyD—C..a.1R—,0pL. F—i,dM
WALTERS/MARSHALL OPERATION SHIFT LOG
Daily Shift Log
Day/Date: 06:00 08/13/02 Thru 06:00 08/14/02
OPERATOR: 06:00-18:00 Nease Leatherwood
18:00-06:00 Larry Boggess
Operator Workaround Items
Walters Plant
Walters unit 1 clearance on governor oil pump C/O #00038560 (6-14-02)
If the computer on the control room desk comes up in the "Safe Mode" again call Bill Talburt or Mike Gailey first
so they can find out if the "Black Box" is causing the trouble. Bill's Ph. # 350-5232 & Mike's Ph # 340-4391
Use unit 2 for minimum flow, units 2-3 for rafting & unit 1 if absolutely needed.
Walters Dam cameras are out of service.
Walters can be generated at 60 MW's if requested to run at 1000 cfs. 16:25 on 08-12-02.
Marshall Plant
Marshall unit 1 Off -line -Hydro Clearance # 23-2000. Speed Increaser & Generator Clearance # 04-2001 for re-
installing speed increaser.
Marshall trash rake is on stop —just hit start when needed. 08:30 on 08-09-02
LAKE LEVELS: Full Pond 06:00 18:00 06:00
Walters: 2258.6 2234.9 2233.2 2233.3
Marshall: 1622.0 1622.4 1622.3 1622.4
06:00 Conditions: Unit 2, is generating. Units 1 and 3 are retired. Marshall unit 1 is under clearance and unit 2
is retired due to low river flow. Relieved by Nease Leatherwood.
06:10 Oil levels, relay targets, voltmeters & sync ok. Panalarm tested.
06:30 Plant checked ok.
06:30 Voith personnel on site.
07:00 Walden's painting crew on Walters site.
07:00 Dan Redmon on Marshall site.
07:30 Issued Hot work permit to voith personnel.
07:45 Cleared, tagged &issued Wayne Freeman local clearance #00040955 on Unit 4 (house unit).
09:45 Wayne Freeman cancelled local clearance on unit 4 (House Unit).
10:45 Notified Skale center of our new Rafting releases for today.
11:00 Plant checked ok.
15:00 Plant checked ok.
17:33 Walters unit 3 off line.
18:00 Cond: Walters unit 2 on line. Unit 1-3 retired. Marshall unit 1 under clearance. Unit 2 off line due to
low river flow. Relieved by Larry Boggess.
18:10 Oil levels, relay targets, voltmeters, and sync ok. Panalarm tested. No active alarms.
18:30 Plant checked OK.
22:00 Plant checked OK.
02:00 Plant checked OK.
05:00 Plant checked OK.
05:20 Called methods and informed them Walters Plant will not release water for rafting due to low lake
elevation per Standing Order # 081202. Faxed a copy of Standing Order to methods.
06:00 Conditions: Unit 2 is generating. Units 1 and 3 are retired. No active alarms. Marshall unit 1 is under
clearance and unit 2 is retired due to low river flow. Relieved by Nease Leatherwood.
NyUw.CuinralRaoiuO�LOLFan��Ja
WALTERS/MARSHALL OPERATION SHIFT LOG
Daily Shift Log
Day/Date: 0600 08/16/02 Thru 06:00 08/17/02
OPERATOR: 06:00-18:00 Randall Bible
18:00-06:00 Joe Parkins
Operator Workaround Items r
Walters Plant
Walters unit 1 clearance on governor oil pump C/O #00038560 (6-14-02)
If the computer on the control room desk comes up in the "Safe Mode" again call Bill Talburt or Mike Gailey first
so they can find out if the "Black Box" is causing the trouble. Bill's Ph. # 350-5232 & Mike's Ph # 340-4391
Use unit 2 for minimum flow, units 2-3 for rafting & unit 1 if absolutely needed.
Walters Dam cameras are out of service.
Placed a caution tag on Unit # 1 TIV control switch. Tag # 2002-01-04
Walters unit #1 is in the "Maintenance Mode" with T.I.V. open.
Marshall Plant
Marshall unit 1 Off -line -Hydro Clearance # 23-2000. Speed Increaser & Generator Clearance # 04-2001 for re-
installing speed increaser.
Marshall trash rake is on stop —just hit start when needed. 08:30 on 08-09-02
LAKE LEVELS: Full Pond 06:00 18:00 06:00
Walters: 22$8.6 2237.2 2237.6 2238.1
Marshall: 1622.0 1622.4 1622.4 1622.5
06:00 Conditions: Unit 2 is generating. Units 1 and 3 are retired. there is an alarm on the trash rake differential,
this is not a valid alarm. Marshall unit 1 is under clearance and unit 2 is retired due to low river flow.
Relieved by Randall Bible.
06:00 Oil levels relay targets voltmeters and sync. ok. Tested Panalarm.
06:00 The Panelview for the TIV valves had a alarm (panelview off line) I could not control the TIV valves
from the control room.
06:16 Plant checked ok.
07:00 All Plant computers are down.
10:20 Issued Randall Arrowood a clearance on the Service Water Pump. C/O # 1. I had to issue this clearance in
hand written form because the computers were out.
10:30 Plant checked ok.
11:15 Placed a caution tag on Unit # 1 TIV valve control switch (tag # 2002-01-04) The switch is in the local
manual and the valve is open.
11:40 Chris Mantooth restored the problem with the TIV valves. The alarm is reset.
11:54 Issued Randall Arrowood a clearance on the Service Water Pump.C/O # 1
13:33 Randall Arrowood cancelled his clearance on the Service Water Pump.
14:20 Plant checked ok.
16:02 Received an alarm on " Dam Control Trouble ", reset ok. Lost Marshall generation computer and PC on
operator desk. Called Help Desk, ticket # 589404.
16:10 Alarm on Panel view from Walters Dam, Panel View is out.
06:00 Conditions: Unit 2 is generating. Units 1 and 3 are retired. there is an alarm on the trash rake differential,
this is not a valid alarm. Marshall unit 1 is under clearance and unit 2 is retired due to low river flow.
Relieved by Joe Parkins.
18:20 Oil levels, relay targets, voltmeters & sync ok, tested panalarm.
18:40 Bell South on site at Walters. Didn't see him leave.
tiru«1cem.1R ,0pLgr.n "
19:30 Plant checked ok.
21:00 Found computers and Panel View working normal.
22:15 Plant checked ok.
24:00 Conditions: Unit 2 is generating. Units 1 and 3 are retired. there is an alarm on the trash rake differential,
this is not a valid alarm. Marshall unit 1 is under clearance and unit 2 is retired due to low river flow.
02:30 Plant checked ok.
04:50 Plant checked ok.
06:00 Conditions: Unit 2 is generating. Units 1 and 3 are retired. there is an alarm on the trash rake differential,
this is not a valid alarm. Marshall unit 1 is under clearance and unit 2 is retired due to low river flow.
Relieved by Randall Arrowood.
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WALTERS/MARSHALL OPERATION SHIFT LOG
Daily Shift Log
Day/Date: 06:00 08/17/02 Thru 06:00 08/18/02
OPERATOR: 06:00-18:00 Randall Arrowood
18:00-06:00 Joe Parkins
Operator Workaround Items
Walters Plant
Walters unit 1 clearance od governor oil pump C/O #00038560 (6-14-02)
If the computer on the control room desk comes up in the "Safe Mode" again call Bill Talburt or Mike Gailey first
so they can find out if the ".Black Box" is causing the trouble. Bill's Ph. # 350-5232 & Mike's Ph # 340-4391
Use unit 2 for minimum flow, units 2-3 for rafting & unit 1 if absolutely needed.
Walters Dam cameras are out of service.
Placed a caution tag on Unit # 1 TIV control switch. Tag # 2002-01-04
Walters unit #1 is in the "Maintenance Mode" with T.I.V. open. Lube oil is turned off unit 1.
Marshall Plant
Marshall unit 1 Off -line -Hydro Clearance # 23-2000. Speed Increaser & Generator Clearance # 04-2001 for re-
installing speed increaser.
Marshall trash rake is on stop —just hit start when needed. 08:30 on 08-09-02
LAKE LEVELS: Full Pond 06:00 18:00 06:00
Walters: 2258.6 2238.1 2236.8 2237.3
Marshall: 1622.0 1622.5 1622.2 1622.3
06:00 Conditions: Unit 2 is generating. Units 1 and 3 are retired. there is an alarm on the trash rake differential,
this is not a valid alarm. Marshall unit 1 is under clearance and unit 2 is retired due to low river flow.
06:50 Oil levels, relay targets, voltmeters, sync ok and panalarm tested.
07:20 Plant checked ok.
07:26 Advised dispatcherme had scheduled release today 12:30 until 17:30, 280 mw's available during this
time.
07:40 Advised Max Gardner that the public information telephone line had not been updated for the scheduled
release for today Saturday, Aug. 17. Max advised he would call and take care of this.
07:54 Max advised the message would be updated.
10:45 Advised,Max the message still had not been updated.
11:20 Advised dispatcher.unit 3 would be on line by 11:45 and 56 mw's on plant by 12:00 for scheduled
release.
11:30 Down stream flow at 165 cfs with 3 mw's on unit 2.
11:45 Walters unit 3 generating.
12:16 They had updated message this morning but equipment wasn't transferring updated message to phone,
they would call sprint and have problem checked out.
12:28 Down stream flow at 1116 cfs with 56 mw's on plant.
12:55 Walters unit 1 lube oil pump coupling was noisy, we had planned to leave this pump on while the TIV
was open but I decided to turn off until maintenance could check it out Monday morning.
13:08 Checked the telephone message for scheduled releases and it had been updated.
13:11 Received a call from Karen with CPL and she advised message was updated and the problem was a
connection with sprint.
13:52 Bell South on Walters site to reset alarm.
14:03 Bell South off site.
15:25 Checked plant ok.
16:03 Marshall unit 2 generating.
MyDm,C.l,Ir Ra. Or4. FO ,,d
17:06 Checked plant ok and operated the backwash system on service water pump.
17:22 Dam control trouble alarm, reset ok.
17:45 Walters unit 3 retired.
18:00 Conditions: Unit 2 is generating. Units 1 and 3 are retired. there is an alarm on the trash rake differential,
this is not a valid alarm. Marshall unit 1 is under clearance and unit 2 is generating. Relieved by Joe
Parkins.
18:50 Oil levels, relay targets, voltmeters, sync ok and panalarm tested.
19:40 Plant checked ok.
20:05 Checked service water screen ok.
20:25 Checked service water pump back wash ok.
22:30 Plant checked ok.
06:00 Conditions: Unit 2 is generating. Units 1 and 3 are retired. there is an alarm on the trash rake differential,
this is not a valid alarm. Marshall unit 1 is under clearance and unit 2 is generating. Relieved by Randall
Arrowood.
�I)1)o. v.0 oi�irolRoomOpl.oKFaniiJoc
z-a
A Progress Energy Company
CP&L
Secretary
Federal Energy Regulatory Commission
Mail Code: DPCA, HL-21.1
888 First Street, NE
Washington, D.C. 20426
SUBJECT: Walters Hydroelectric Project - FERC Project No. 432
License Article 405: Dissolved Oxygen Monitoring
Dear Secretary:
August 1, 2002
AUG
v 8 2002
I am providing this letter to inform you that dissolved oxygen levels in the Pigeon River below the
Walters Powerhouse apparently fell below 5.0 milligrams per liter (mg/1) for brief and minor incidents in
early July. - According to provisional data (subject to revision) measured at the USGS gaging station
below the Walters Powerhouse, brief incidents occurred on July 2, 3, and 4. Data is recorded at 15-
minute intervals at this USGS gaging station. The provisional data shows one 15-minute interval reading
of 4.3 mg/1 and one reading of 4.6 mg/l. Twelve other 15-minute interval readings were recorded in the
4.7 — 4.9 mg/l range.
This information is being provided in accordance with the Walters License Article 405, as
supplemented by the FERC Order dated January 29, 1996 for Project No. 432-016. The incident was
verbally reported to: Mr. William Ross, FERC-Atlanta; Mr. David McKinney, Tennessee Wildlife
Resources Agency (TWRA); Mr. Steve Reed, North Carolina Department of Environment and Natural
Resources (NCDENR); Mr. Forrest Westall, North Carolina Division of Water Quality (NCDWQj; and
Mr. Bob Fletcher, FERC-Washington. No comments have been received as of the date of this letter.
The minor deviations below the 5.0 mg/1 threshold given in the FERC Order are well within the
known tolerance limits of aquatic life. The United States Environmental Protection Agency (EPA) has
stated that 3.0 mg/1 is the threshold dissolved oxygen concentration needed for many species' survival.
Tennessee's water quality standard for dissolved oxygen is generally 5.0 mg/1 with an absolute minimum
of 3.0 mg/1. Similarly, North Carolina has adopted a dissolved oxygen standard of 5.0 mg/1(daily
average with minimum instantaneous measurements not permissible below 4.0 mg/1) for the majority of
its waters. No adverse environmental impacts were observed or reported resulting from the incidents
described in this letter. However, CP&L will continue to monitor dissolved oxygen data on a regular
basis with the goal of quickly identifying any variances of this nature in the future.
Tillery Hydro Plant
179 Tillery Dam Road
Mt. Gilead, NC 27306
X
Please see attached USGS provisional data and Walters Plant Daily Generation logs for details. The
attached USGS provisional data includes dissolved oxygen, temperature, and stream flow data as
measured at the USGS Gage No. 03460795, Pigeon River below power Plant near Waterville, N.C. If
you have any questions or comments regarding this matter, please call Mr. Larry Mann at (910) 439-
5211, extension 1202.
Sincerely,
B Am P. .
Manager, Hydro Operations
Mr. David McKinney- Tennessee Wildlife Resources Agency
Mr. Robert Fletcher — FERC-Washington
Mr. Jerrold W. Gotzmer, P.E. - Director - Atlanta Regional Office
Mr. Steve Reed — NC Division of Water Resources
Mr. William Ross — FERC-ARO
Mr. Forrest Westall — NC Division of Water Quality
Mr. Larry Mann
Mr. David McKinney
Tennessee Wildlife Resources Agency
P.O. Box 40747
Nashville, Tennessee 37204
Mr. Robert Fletcher
Federal Energy Regulatory Commission
Mail Code: DPCA, HL-21.1
888 First Street, NE
Washington, D.C. 20426
Mr. Jerrold W. Gotzmer, P.E.
Director - Atlanta Regional Office
Federal Energy Regulatory Commission
3125 Presidential Parkway - Suite 300
Atlanta, Georgia 30340
Mr. Steven E. Reed
North Carolina Department of Environment and Natural Resources
Division of Water Resources
1611 Mail Service Center
Raleigh, North Carolina 27699-1611
.7
Mr. William Ross
Federal Energy Regulatory Commission
3125 Presidential Parkway - Suite 300
Atlanta, Georgia 30340
Mr. Forrest Westall
N.C. Division of Water Quality
59 Woodfm Place
Asheville, N.C. 28801
Data Category: Geo ra hic Area:
Water Resources skip navigation Real-time North Carolina
USGS 03460795 PIGEON R BL POWER PLANT NR
WATERVILLE, NC
PROVISIONAL DATA SUBJECT TO REVISION
Available data for this site Recent daily
This station is operated in cooperation with Carolina Power and Light (CP&L).
Water -quality data collected seasonally from June to September.
Available Parameters Output format
All 11 parameters available at this site lGraph
00065 GAGE HEIGHT Mean (DD 01)
00060 DISCHARGE Mean (DD 02)
00010 WATER TEMPERATURE Maximum (DD 12)
OXYGEN DISSOLVED (MG/L)
Most recent value: 07-31-2002
USGS 03460795 PIGEON R BL POKER PLRNT NR NRTERVILLE, NC
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ORTES; 06101/2602 to 08/01/2082 23:59
Download a presentation -quality graph Parameter Code 00300; DD 13
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skip navigation Data Category: Geo ra hic Area:
Water Resources Real-time � North Carolina GOB
USGS 03460795 PIGEON R BL POWER PLANT NR
WATERVILLE, NC
PROVISIONAL DATA SUBJECT TO REVISION
Available data for this site Recent daily �.,
This station is operated in -cooperation with Carolina Power and Light (CP&L).
Water -quality data collected seasonally from June to September.
Wailable Parameters Output format Da
All 11 parameters available at this site Graph
00065 GAGE HEIGHT Mean (DD 01)
00060 DISCHARGE Mean (DD 02)
00010 WATER TEMPERATURE Maximum (DD 12)
OXYGEN DISSOLVED (MG/L)
Most recent value: 07-31-2002
USGS 03460795 PIGEON R BL POKER PLRHT HR HATERVILLE, HC
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ORTES*. 06/01/2002 to 08/01/2002 23:59
Download a presentation -quality graph Parameter Code 00300; DD 13
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.T Data Category: Geographic Area:
Water Resources skip navigation Real-time k North Carolina
USGS 03460795 PIGEON R BL POWER PLANT NR
WATERVILLE, NC
PROVISIONAL DATA SUBJECT TO REVISION
Available data for this site Real-time
This station is operated in -cooperation with Carolina Power and Light (CP&Q.
Water -quality data collected seasonally from June to September.
Available Parameters Output format
1All 5 parameters available at this site Table
00065 GAGE HEIGHT (DD 01)
00060 DISCHARGE (DD 02)
00010 WATER TEMPERATURE (DD 12)
ZvNs�.h-�-oyteaus D�ss�lved OXy�e,t
TIME Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul J
1 2
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 ;
00:15 6.1 8.7
8.2 5.8 5.5 6.7 6.5 6.1 6.2 6.2 6.9 7.4 7.5 7.1 7.2 7.3 7.2 7.2 7.1 7.2 6.9 7.0 7.1 E
00:30 5.9 8.8
8.15.85.56.86.56.26.26.16.97.47.57.17.27.37.27.27.37.26.97.07.1E
00:45 5.9 8.8
8.1 5.8 5.5 6.8 6.5 6.2 6.2 6.2 6.9 7.4 7.4 7.2 7.2 7.3 7.2 7.2 7.3 7.2 6.9 7.0 7.1 E
01:00 6.0 8.8
8.1 5.8 5.5 6.8 6.5 6.3 6.2 6.2 7.0 7.4 7.5 7.2 7.3 7.3 7.2 7.2 7.4 7.3 6.9 7.0 7.1 E
01:15 6.1 8.8
8.05.85.56.86.56.36.26.27.27.47.47.17.37.37.27.27.47.26.97.07.1E
01:30 6.1 8.8
7.7 5.8 5.5 6.8 6.4 6.3 6.1 6.2 7.2 7.4 7.4 7.1 7.3 7.3 7.2 7.2 7.4 7.2 6.9 6.9 7.2 E
01:45 6.1 8.8
7.55.85.56.76.46.36.26.27.37.47.47.17.47.37.27.27.47.26.96.97.2E
02:00 6.2 8.9
7.35.75.56.86.36.36.26.27.37.47.47.17.37.27.27.27.47.36.96.97.2 i
02:15'6.2 8.9
7.25.75.56.76.36.36.16.27.37.47.47.17.47.37.27.27.47.36.96.97.1 i
02:30 6.2 8.9
7.05.85.56.66.36.36.16.27.47.37.57.27.47.37.27.27.47.36.96.97.1
02:45 6.4 8.9
6.85.85.56.76.36.36.16.17.57.37.57.17.47.37.27.27.57.36.96.97.1 i
03:00 6.4 8.9
6.7 5.8 5.5 6.8 6.3 6.3 6.1 6.1 7.5 7.4 7.4 7.2 7.4 7.3 7.2 7.2 7.5 7.3 6.9 6.9 7.2 i
03:15 6.4 8.9
6.5 51.7 5.5 6.8 6.3 6.3 6.1 6.1 7.5 7.4 7.3 7.2 7.4 7.3 7.2 7.2 7.5 7.4 6.9 6.9 7.2 i
03:30 6.4 8.9
6.55.85.56.76.36.36.16.17.67.47.37.27.47.37.27.27.57.46.97.07.2 i
03:45 6.5 8.9
6.55.85.56.76.36.36.26.17.67.47.37.27.47.37.27.27.57.46.97.07.2 i
04:00 6.5 9.0
6.4 5:8 5.5 6.8 6.3 6.3 6.2 6.1 7.6 7.5 7.4 7.2 7.4 7.3 7.2 7.2 7.5 7.4 6.9 7.0 7.2 i
04:15 6.5 9.0
6.45.85.56.76.36.36.26.17.67.67.47.27.37.37.27.27.57.46.97.17.3 i
04:30 6.5 9.0
6.45.85.56.76.36.36.26.17.57.57.47.27.47.37.27.27.57.56.97.17.3 i
04:45 6.5 8.9
6.5 5.8 5.5 6.7 6.3 6.4 6.2 6.1 7.5 7.5 7.4 7.2 7.4 7.3 7.2 7.2 7.5 7.5 6.9 7.2 7.3
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05:00 6.6 9.0 6.5 5.8 5.4 6.7 6.3 6.4 6.2 6.1 7.5 7.5 7.4 7.2 7.4 7.3 7.2 7.2 7.5 7.4 6.9 7.2 7.4 i
05:15 6.8 9.0 6.65.85.46.76.36.36.16.17.57.47.47.27.47.37.27.27.57.46.97.27.4 i
05:30 6.9 9.0 6.65.85.46.76.36.46.26.17.57.47.47.27.47.37.27.27.57.56.97.27.4 i
05:45 7.1 9.0 6.75.85.36.76.36.56.26.17.47.47.47.17.37.37.27.27.67.46.97.27.4 i
06:00 7.0 9.0 6.75.85.46.56.36.46.26.17.47.17.57.17.47.47.37.27.67.46.97.27.4 i
06:15 7.2 9.0 6.85.95.46.76.26.36.26.07.4747.37.17.47.37.37.27.67.46.97.27.4 i
06:30 7.5 9.0 7.1 5.9 5.4 6.7 6.3 6.4 6.0 6.1 7.3 7.5 7.5 7.1 7.4 7.4 7.4 7.2 7.6 7.4 6.9 7.2 7.4 i
06:45 7.5 9.0 7.25.95.36.76.36.46.26.17.57.57.57.17.47.47.47.27.67.46.87.27.4 i
07:00 7.5 9.0 7.06.05.36.76.36.46.26.17.57.37.57.17.47.47.57.37.67.46.97.27.2 i
07:15 6.9 8.4 7.25.95.46.76.46.46.26.17.57.37.47.17.47.47.57.37.67.46.97.27.4 i
07:30 7.7 8.5 7.35.95.46.76.46.46.36.17.57.37.47.17.47.47.57.37.77.46.97.27.5 i
07:45 7.8 9.0 7.36.05.46.76.46.46.46.27.57.27.47.17.57.57.67.37.77.46.97.27.4 i
08:00 7.8 9.1 7.56.15.76.86.56.46.46.27.57.27.47.17.57.57.67.47.87.36.97.37.5 i
08:15 8.0 9.1 7.76.15.96.86.56.46.46.27.57.27.47.27.57.57.77.47.87.57.07.37.6 i
08:30 8.1 9.2 7.9 6.2 6.0 6.9 6.6 6.5 6.5 6.2 7.5 7.2 7.4 7.2 7.6 7.5 7.7 7.5 7.8 7.6 7.1 7.3 7.6 i
08:45 8.3 9.3 7.96.36.17.06.76.76.56.37.77.27.47.27.67.67.87.67.87.67.37.37.7 i
09:00 8.4 9.4 8.26.36.27.16.76.86.66.47.77.27.47.37.77.67.87.77.87.77.47.47.7 i
09:15 8.6 9.5 8.4 6.4 6.4 7.2 6.8 7.0 6.6 6.4 7.8 7.2 7.4 7.4 7.7 7.7 7.9 7.7 7.9 7.8 7.5 7.4 7.8 i
09:30 8.9 9.5 8.6 6.4 6.4 7.3 6.9 7.1 6.7 6.5 7.8 7.3 7.4 7.4 7.8 7.7 7.9 7.8 7.9 7.9 7.6 7.5 7.9 i
09:45 9.2 9.6 8.7 6.5 6.5 7.4 7.0 7.1 6.7 6.6 8.0 7.4 7.4 7.5 7.8 8.0 7.9 8.0 7.9 7.7 7.6 7.8 i
10:00 9.3 9.8 8.8 6.6 6.6 7.5 7.2 7.2 6.8 6.5 8.0 7.5 7.5 7.6 7.9 8.0 8.0 6.9 8.1 7.7 7.7 8.0 i
10:15 9.4 9.8 9.0 6.6 6.9 7.5 7.3 7.3 6.9 6.6 8.1 7.6 7.5 7.7 7.9 8.1 8.1 7.8 8.1 7.8 7.8 8.1 i
10:30 9.6 9.9 9.16.77.17.67.57.47.06.78.17.77.57.7 8.08.18.28.18.38.08.08.1E
10:45 9.7 9.9 9.3 6.8 7.3 7.8 7.6 7.5 7.2 6.7 8.1 7.8 7.6 7.8 8.0 8.1 8.2 8.3 7.6 8.3 8.1 8.1 8.2 E
11:00 9.710.09.46.97.67.97.77.67.26.78.28.07.37.88.08.28.38.47.28.48.28.38.4E
11:15 9.8 10.0 9.4 6.9 7.97.87.77.36.88.28.27.17.88.08.28.48.47.18.48.38.48.2 i
11:30 9.8 9.5 9.57.0 8.07.97.77.46.88.38.27.07.88.28.38.58.57.18.48.48.47.1 i
1 1:45 9.9 8.4 9.0 7.0 7.5 7.9 7.9 7.8 7.0 6.5 7.5 8.2 6.9 7.9 8.3 7.3 7.3 7.7 7.1 8.4 8.5 7.6 6.4 E
12:00 9.9 7.4 7.6 5.1 7.7 6.1 8.0 7.9 5.4 6.1 7.6 8.2 6.7 8.0 8.3 7.1 6.8 6.8 7.2 6.8 8.5 7.1 6.5 E
12:15,9.9 8.4 7.55.07.75.68.07.95.45.37.58.26.98.08.37.16:86.87.36.78.57.16.6E
12:30 9.9 8.2 7.6 5.1 7.7 5.7 8.0 8.0 5.8 5.3 7.3 8.2 7.0 8.1 8.2 7.0 6.9 7.0 7.4 6.7 8.5 7.3 6.6 E
12:45 ,9.8 8.6 7.4 5.7 7.7 5.6 8.1 8.1 5.8 5.5 7.2 8.2 7.0 8.2 8.2 6.9 7.0 7.1 7.4 6.9 8.4 7.5 6.9 E
13:00 9.8 8.5 7.85.77.65.88.18.16.25.57.08.26.98.28.26.86.97.27.56.98.67.86.9E
13:15 9.7 8.6 8.26.17.36.28.18.26.65.87.08.26.88.38.16.76.87.17.67.08.68.06.9E
13:30 9.6 8.6 8.1 6.1 6.8 6.4 8.1 8.2 6.6 6.1 7.0 8.2 6.8 8.3 8.1 6.8 6.8 7.1 7.6 7.0 8.6 7.9 6.9 E
13:45 9.6 8.7 8.0 6.0 6.8 6.4 8.1 8.2 6.6 6.1 6.8 8.1 6.8 8.3 8.1 6.8 6.8 7.0 7.6 7.0 8.5 7.9 6.9 E
14:00 9.5 8.7 7.9 5.9 6.8 6.4 8.1 8.1 6.6 6.2 6.8 8.1 6.7 8.2 8.1 6.8 6.8 6.9 7.5 7.1 8.5 8.0 6.9 E
14:15 9.5 8.6 7.75.86.96.48.18.26.66.26.88.06.78.28.16.86.86.97.57.08.47.56.9E
14:30 9.5 8.6 7.65.86.86.48.08.16.66.36.88.06.78.28.16.86.86.97.57.08.47.36.9E
14:45 9.4 8.6 7.65.77.06.48.08.16.66.36.88.06.78.28.16.86.76.97.56.98.47.36.8E
15:00 9.1 8.5 7.65.67.06.38.08.06.56.46.88.06.78.18.16.86.76.97.56.88.47.36.7E
httn•//nr \xynfP,AI0 ......n ..-/ /,,..9AA -A-14 P.f... �_L � 1 D ... ]_�!1 D_ :a � _ nn nn/n1 innn .
15:15 9.1 8.5 7.65.57.06.37.97.96.56.46.77.96.78.18.16.86.76.97.56.88.37.35.8E
15:30 8.9 8.4 7.45:57.06.27.87.76.46.46.67.96.68.08.16.86.76.97.46.88.37.26.2E
15:45 8.8 8.3 7.65 .4 7.0 6.2 7.8 7.7 6.3 6.3 6.5 7.9 6.6 7.9 8.1 6.8 6.7 7.0 7.4 6.8 8.27.1 6.3(
16:00 9.1 8.2 7.75.37.06.17.77.66.26.26.57.96.77.98.16.86.76.97.36.78.27.06.3E
16:15 8.7 8.2 7.65.27.16.07.67.56.26.26.47.96.77.98.06.76.76.97.36.78.27.06.3E
16:30 8.2 8.2 7.45.06.96.07.47.46.26.26.27..96.67.98.06.76.76.97.36.78.27.26.3E
16:45 8.0 8.1 7.54?6.56.07.37.36.16.26.17.86.67.87.86.66.66.87.46.68.17.26.1E
17:00 7.9 8.0 7.4:'6.66.07.37.36.06.16.07.86.57.97.36.66.56.87.86.68.17.25.9E
17:15 7.9 7.8 5.811,41-11
-6.75.97.27.35.96.15.97.86.47.77.26.66.56.87.96.58.07.15.9E
17:30 7.8 5.5 5.3. 6.65.97.27.55.86.25.97.86.47.87.26.56.56.77.96.48.07.15 .8 E
17:45 7.8 5.1 5.2 5.1 6.5 5.8 7.1 7.5 5.8 5.8 5.9 7.8 6.3 7.8 7.4 6.5 6.5 6.7 8.0 6.4 8.0 7.1 5.9 E
18:00 7.4 5.8 5.347,16.65.77.17.45.76.25.97.66.37.97.46.56.46.77.96.37.97.16.0E
18:15 8.3 5.3 5.05.36.65.77.17.45.76.35.97.66.37.87.46.66.46.67.96.37.97.26.0E
18:30 8.1 5.6 5.0"' 6.85.37.17.45.56.45.87.66.27.87.56.46.46.57.96.37.87.36.0E
18:45 8.0 5.2 ',�- �6.8 5.2 7.2 7.3 5.7 6.4 5.8 7.5 6.2 7.7 7.4 6.5 6.5 6.5 7.8 6.3 7.8 7.3 6.0 E
19:00 7.6 5.0 5.17.05.47.17.16.06.56.27.56.17.77.46.76.76.67.86.47.87.35.9E
19:15 7.9 5.0 6.9 5.7 7.1 7.0 6.2 6.5 6.5 7.5 6.1 7.7 7.4 7.0 6.8 6.9 7.7 6.6 7.7 7.2 5.9 E
19:30 8.0 411 5.2 6.8 5.9 7.1 6.8 6.2 6.4 6.9 7.4 6.1 7.7 7.5 7.3 7.1 7.2 7.7 6.8 7.7 7.2 5.8 f
19:45 8.16.76.07.06.86.16.36.87.46.17.57.57.47.37.47.67.17.67.25.8f
4r5.46.66.46.96.76.16.37.17.46.07.57.57.47.57.67.67.37.57.35.9
E0:00 8.2 M9E
20:15 8.5 5.9 5135.56.76.76.86.76.16.37.17.56.17.37.57.57.57.77.67.37.57.36.1E
20:30 8.5 6.0 5.4 15.5 6.6 6.7 6.7 6.6 6.1 6.5 7.2 7.5 6.2 7.3 7.5 7.4 7.5 7.6 7.5 7.3 7.4 7.3 6.4 E
20:45 8.4 6.3 5.45.56.46.76.66.66.06.67.27.36.37.27.47.47.47.67.57.27.37.36.7 i
21:00 8.5 7.1 5.5'5.56.46.66.56.65.86.77.27.46.77.37.47.37.47.57.47.17.27.36.7 i
21:15 8.5 7.2 5.65.56.36.56.46.55.86.77.27.47.07.47.37.37.47.57.37.17.27.26.7 i
21:30 8.5 7.8 5.65.56.36.66.46.46.06.67.27.47.17.37.37.27.37.57.17.17.27.26.8 i
21:45 8.6 7.9 5.75.56.26.56.26.45.86.67.27.47.07.37.37.27.37.36.97.07.17.26.8 i
22:00 8.4 8.0 5.8„5.5 6.2 6.5 5.7 6.3 5.7 6.5 7.2 7.4 7.0 7.2 7.3 7.2 7.3 6.8 6.9 7.0 7.1 7.2 6.8 E
22:15 8.5 7.9 5.8.5.5 6.2 6.5 5.4 6.3 5.7 6.4 7.2 7.4 7.0 7.2 7.3 7.2 7.2 6.7 6.9 7.0 7.0 7.1 6.8 E
22:30 , 8.6 8.2 5.8 5.5 6.2 6.5 5.4 6.2 5.5 6.7 7.2 7.4 7.1 7.2 7.3 7.2 7.2 6.7 7.0 6.9 7.0 7.2 6.8 E
22:45 8.6 8.3 5.8 5.5 6.3 6.5 5.4 6.1 5.5 6.9 7.3 7.4 7.1 7.2 7.3 7.2 7.2 6.7 7.0 6.9 6.8 7.1 6.8 E
23:00 8.5 8.2 5.7 5.5 6.5 6.4 5.5 6.2 5.2 6.9 7.3 7.5 7.1 7.1 7.3 7.2 7.2 6.7 7.1 6.9 7.0 7.0 6.9 E
23:15 8.6 8.2 5.8.5.5 6.6 6.4 5.6 6.2 5.2 6.9 7.3 7.4 7.1 7.2 7.3 7.2 7.2 6.8 7.1 6.9 7.0 7.2 6.9 E
23:30 8.4 8.2 5.8 5.5 6.6 6.5 5.7 6.1 5.3 6.9 7.3 7.5 7.2 7.2 7.3 7.2 7.2 6.8 7.1 6.9 7.0 7.2 6.8 E
23:45 8.6 8.2 5.8,5.56.76.55.96.25.86.97.37.57.17.37.37.27.26.87.26.97.07.16.9E
24:00 8.7 8.2 5.81'5.5 6.7 6.5 6.1 6.0 6.1 6.8 7.4 7.5 7.2 7.2 7.3 7.2 7.2 6.9 7.2 6.9 7.0 7.1 6.8 E
COUNT 96 96 96 96 94 96 96 96 96 96 96 96 96 96 92 96 96 96 96 96 96 96 96 !
MAX 9.910.09.57.07.78.08.18.27.46.98.38.27.68.38.38.38.58.58.18.48.68.48.4E
MIN 5.9 46 47435.35.25.46.05.25.35.87.16.07.17.26.46.46.56.96.36.86.95.8�
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httn•//nr .z,.ro,-A-+, ,, .,..../ /,,..7 to -A-112
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Data Category:Geo ra hic Area:
Water Resources Real-time North Carolina �,� �,
USGS 03460795 PIGEON R BL POWER PLANT NR
WATERVILLE, NC
PROVISIONAL DATA SUBJECT TO REVISION
Available data for this site Real-time
This station is operated in -cooperation with Carolina Power and Light (CP&L).
Water -quality data collected seasonally from June to September.
Available Parameters Output format Da
All 5 parameters available at this site Table (31
00065 GAGE HEIGHT (DD 01) ��--
100060 DISCHARGE DD 02)
�LiU00010 WATER TEMPERATURE (DD 12)
TIME Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul
1 Ju12 Ju13 Ju14 5 Ju16 7 R Jul 9 in 11 ,1 11 , A , Z , r ,
py
00:15 153 170 225 228 213 126 126 141 143 191 391 360 228 207 210 219 170
00:30 153 170 222 225 213 126 124 141 143 191 373 347 228 207 210 219 170
00:45 153 170 222 222 213 126 124 141 145 191 373 339 225 207 210 219 17.0
01:00 153 170 222 222 213 126 126 141 145 188 373 330 225 207 210 213 170
01:15 153 170 222 219 213 126 133 138 145 188 368 322 225 207 210 205 170
01:30 155 167 222 219 213 126 136 138 145 188 368 318 225 205 210 199 170
01:45 155 167 222 216 213 126 138 136 145 188 368 310 231 205 210 196 170
02:00 155 167 222 216 213 126 138 136 145 188 360 303 .235 205 210 196 170
02:15 '155 167 225 213 213 126 138 136 143 188 355 299 235 205 210 196 167
02:30 160 167 .225 213 213 126 138 136 143 188 351 299 235 205 210 196 170
02:45 165 167 225 210 213 124 138 136 143 188 347 310 235'205 210 196 170
03:00 170 167 225 210 213 126 138 136 143 188 339 322 235 205 210 196 167
03:15 175 167 225 207 213 133 138 136 143 188 339 326 231 205 207 196 170
03:30 175 167 222 207 213 138 138,136 141 185 334 326 231 205 207 196 167
03:45 175 167 222 207 213 141 138 136 141 188 326 322 231 205 207 196 167
04:00 175 167 222 207 210 141 138 136 141 185 326 318 231 205 207 196 167
04:15 172 167 222 210 210 141 138 136 141 185 322 314 231 207 207 196 167
04:30 172 167 222 222 210 141 138 136 141 185 318 310 231 207 207 194 167
04:45 172 167 222 228 210 141 138 136 141 185 314 303 231 207 205 194 167
l,tt..•//,,.......+o_A_+.. ,,... --"/ /....')aa o-r-_ , --f °---- - ' -„ o__:'�_ - - - - ,, , —
05:00 172 167 222 235 210 141 138 136 141 185 310 299 231 207 205 194 167
05:15 172 167 222 235 210 141 138 136 138 185 306 295 228 207 205 194 167
05:30 172 167 222 235 210 141 138 136 138' 185 306 291 228 207 205 194 167
05:45 175 167 222 235 210 141 138 136 138 185 303 287 228 207 205 194 167
06:00 175 167 210 231 210 141 138 136 138 185 299 284 228 207 205 194
06:15 175 167 219 231 210 141 138 136 138 185 299 295 228 207 205 194
06:30 175 167 21'9 228 210 141 138 136 138 185 295 303 228 207 205 194
06:45 180 165 219 228 210 141 138 136 138 185 291 306 228 210 202 194
07:00 188 165 219 222 210 141 138 136 155 185 291 303 228 210 202 194
07:15. 191 165 219 219 210 141 138 138 167, 185 287 299 228 210 202 194
07:30 191 165 202 216 210 141 138 136 172 185 287 299 228 210 202 194
07:45 191 165 185 216 207 141 138 136 172 185 284 295 228 210 202 194
08:00 188 165 180 213 205 141 138 136 175 185 284 291 225 210 202 194
08:15 188 165 180 213 205 143 138 136 180 185 280 291 225 210 202 194
08:30 188 165 183 213 205 143 138 136 188 185 280 287 225 210 202 194
08:45 188 165 183 210 205 145 138 136 196 185 276 284 225 210 202 194
09:00 185 165 183 210 205 145 138 136 205 185 273 284 225 210 202 194
09:15 185 165 183 210 205 148 138 136 210 185 273 284 225 210 202 194
09:30 185 165 183 207 205 148 138 136 216 185 273 280 225 210 202 194
09:45 183 165 183 207 205 148 138 136 216 185 269 280 225 210 202 194
10:00 183 165 183 207 205 148 141 136 219 196 269 276 225 210 205 194 167
10:15 183 165 180 207 205 150 141 136 222 207 265 276 231 210 205 194 165
10:30 183 165 180 205 205 150 141 136 222 205 265 276 306 210 205 -194 167
10:45 180 165 180 205 205 153 141 136 222 202 262 273 395 210 205 194 167
11:00 180 165 180 205 205 153 143 136 225 205 262 273 530 210 205 194 167
11:15 180 165 180 202 205 153 141 136 225 207 262 273 565 210 207 196 167
11:30 1801,340 267 202 205 153 141 136 231 216 810 269 639 210 210 748 516
11:45 180 1,429 1,2701,110 202 730 141 136 1,200 382 1,429 269 1,340 210 2101,360 1,330
12:00 178 1,440 1,380 1,330 2021,330 143 136 1,360 1,390 1,429 269 1,380 210 210 1,409 1,350
12:15 ,178 1,380 1,370 1,330 2021,380 141 136 1,3601,480 1,429 265 1,370 210 210 1,409 1,340
12:30 178 1,380 1,360 1,320 202 1,370 143 136 1,350 1,380 1,419 265 1,360 210 207 1,419 1,330
12:45 178 1,380 1,400 1,390 291 1,380 141 136 1,360 1,390 1,409 265 1,360 210 2101,419 1,380
13:00 178 1,380 1,400 1,320 433 1,380 143 136 1,360 1,429 1,419 262 1,360 210 207 1,419 1,390
13:15 178 1,330 1,400 1,290 453 1,350 141 136 1,350 1,429 1,409 262 1,340 207 207 1,409 1,390
13:30 180 1,320 1,400 1,320 458 1,350 141 136 1,350 1,440 1,409 258 1,360 207 207 1,419 1,400
13:45 1801,320 1,4001,510 453 1,370 143 136 1,360 1,429 1,409 258 1,370 207 207 1,419 1,400
14:00 1801,320 1,429 1,500 458 1,370 141 136 1,360 1,450 1,400 258 1,390 207 207 1,409 1,400
14:15 180 1,310 1,320 1,380 453 1,360 143 136 1,360 1,440 1,400 258 1,390 207 207 1,409 1,400
14:30 180 1,320 1,310 1,340 458 1,360 141 136 1,360 1,450 1,390 255 1,390 207 207 1,419 1,400
14:45 180 1,320 1,310 1,340 453 1,360 141 136 1,3701,470 1,380 255 1,390 207 207 1,409 1,400
15:00 180 1,320 1,300 1,340 453 1,370 141 136 1,360 1,480 1,380 255 1,390 207 207 12409 1,400
httn•//nr-.:,oro,,anrn _ ,/ /._,)AA ,.,-A,)P�F...... _L.a...-10____- _ i 7t o__:a_ -__ -I-- I--
15:15 180 1,320 1,290 1,330 458 1,360 141 136 1,360 1,470 1,380 255 1,390 207 205 1,409 1,390
15:30 180 1,360 1,290 1,330 458 1,360 141 136 1,360 1,460 1,390 251 1,390 205 207 1,400 1,400
15:45 178 1,360 1,330 1,320 458 1,370 141 136 1,360 1,440 1,380 251 1,380 205 205 1,409 1,390
16:00 178 1,370 1,340 1,330 506 1,360 141 136 1,350 1,429 1,390 251 1,390 205 205 1,409 1,400
16:15 178 1,370 1,350 1,320 530 1,360 141 136 1,350 1,429 1,390 251 1,390 205 205 1,409 1,400
16:30 178 1,370 1,340 1,320 701 1,360 141 136 1,340 1,419 1,390 248 1,380 205 473 1,390 1,400
16:45 178 1,360 1,330 1=320 718 1,360 141 136 1,350 1,409 1,390 248 1,400 205 628 1,390 1,400
17:00 178 1,340 1,330 1;466:724 19360141 136 1,350 1,409 1,390 248 1,390 205 545 1,400 1,400
17:15 178 1,330 1,330 ;1`530724 1,350141 136 1,340 1,390 1,380 248 1,380 205 458 1,400 1,400
17:30 175 1,320 1,340 --,. 9724 1,360 141 136 1,360 1,390 1,390 245 1,400 205 419 1,400 1,390
17:45 175 1,330 1,330 1,350 724 1,360 141 136 1,360 1,409 1,390 245 1,400 205 368 1,400 1,390
18:00 175 1,340 1,3301350241,360 141 136 1,370 1,480 1,400 245 1,400 205 339 1,390 1,390
18:15 175 1,330 1,320 1,320 730 1,360 141 133 1,3501,490 1,040 245 1,400 205 326 1,120 1,230
18:30 175 1,320 19310 .8Qj 724 1,200 138 133 991 1,500 511 241 1,400 205 287 511 689
18:45 175 1,320 1;31:0 463= 724 701 141 133 596 1,510 303 241 1,390 202 251 269 347
19:00 175 1,320 1t280 291 724 351 141 133 511 1,500 262 241 1,400 202 241 196 216
19:15 175 1,320 86V' 245 724 210 138 136 497 1,480 299 241 1,400 219 238 178 178
e
19:30 175 ,1;i9Q_ 44- 235 718 162 138 133 492 1,480 314 241 1,409 222 238 172 165
;<
19:45 175 785; 273: 231 713 145 141 133 492 1,320 343 241 1,130 216 235 170 162
20:00 178 433 228` 228 713 138 141 133 487 766 364 238 575 213 235 167 160
20:15 178 276 222 228 701 136 138 133 487 602 364 238 303 210 235 165 160
20:30 178 241 228 225 701 136 138 133 555 586 364 238 222 213 235 162 160
20:45 178 231 235 222 695 ,133 138 133 555 596 364 238 202 216 235 160 160
21:00 178 228 251 222 695 133 138 133 438 607 355 235 199 216 231 160 160
21:15 178 228 258 219 695 133 138 133 487 612 347 235 199. 216 231 157 160
21:30 178 228 262 219 586 131 360 133 586 612 343 235 202 216 231 157 160
21:45 175 228 258 219 306 131 581 133 607 612 339 235 205 216 231 160 157
22:00 175 231 258 219 191 129 602 133 607 586 347 231 207 216 231 167 157
22:15 175 231 255 219 150 129 550 133 607 483 377 231 207 216 231 170 157
22:30 ;175 231 251 216 136 129 433 133 535 448 395 231 -207 216 228 172 157
22:45 175 228 251 216 131 129 276 133 463 438 395 231 210 216 228 172 157
23:00 175 228 251 216 129 129 188 133 273 433 391 228 210 213 225 172 157
23:15 175 228 245 216 126 129 155 136 210 428 382 228 210 213 222 170 157
23:30 172 225 241 216 126 129 143 141 205 423 386 228 207 213 219 170 157
23:45 170 225 238 216 126 129 141 141 199 423 377 228 207 210 219 170 157
24:00 170 225 231 216 126 129 14f 141 194 419 368 228 207 210 219 170 157
COUNT 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 80
MAX 191 1,440114291,530 7301,380 602141 1,3701,51019429 3601,409 222 6281,4191,400
MIN 153 165 180 202 126 124 124133 138 185 262 228 199 202 202 157 157
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httn-//n!` xzlat,rioto --o -r ,/ /nvirlA D_-.,--*--]_l, 1 o-_:a- _ nn in n nn ins inns -
Data Category: Geographic Area:
Water Resources skip navigation Real-time f. °
.� North Carolina
USGS 03460795 PIGEON R BL POWER PLANT NR
WATERVILLE, NC
PROVISIONAL DATA SUBJECT TO REVISION
Available data for this site Real-time 77H ON
This station is operated in -cooperation with Carolina Power and Light (CP&L).
Water -quality data collected seasonally from June to September.
Available Parameters Output format Da
1All 5 parameters -available at this site ITable 31
00065 GAGE HEIGHT (DD 01)
00060 DISCHARGE (DD 02)
TIME Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Ju:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
00:15 21.7 21.8 21.8 21.4 22.122.5 22.5 22.2 22.3 22.7 21.9 21.5 21.2 21.2 21.2 21.3 22.0 22.122.
00:30 21.6 21.8 21.8 21.5 22.122.4 22.4 22.2 22.3 22.7 21.9 21.4 21.2 21.2 21.121.3 2'1.9 22.122.
00:45 21.6 21.8 21.8 21.5 22.122.4 22.4 22.2 22.3 22.6 21.9 21.3 21.2 21.2 21.121.3 21.9 22.122.
01:00 21.6 21.8 21.8 21.5 22.0 22.4 22.3 22.2 22.2 22.6 21.7 21.2 21.2 21.2 21.121.3 21.9 22.122.
01:15 21.5 21.8 21.8 21.5 22.0 22.3 22.3 22.122.2 22.5 21.5 21.2 21.121.2 21.121.2 21.8 22.122.1
01:30 21.5 21.7 21.8 21.5 22.0 22.3 22.3 22.122.3 22.5 21.4 21.121.121.2 21.0 21.2 21.8 22.0 22.1
01:45 21.5 21.7 21.7 21.5 22.0 22.3 22.2 22.0 22.2 22.5 21.4 21.0 21.121.2 21.0 21.2 21.8 22.0 22.(
02:00 21.5 21.7 21.3 21.5 22.0 22.2 22.2 22.0 22.2 22.4 21.3 21.0 21.121.2 21.0 21.2 21.8 22.0 21.1
02:15' 21.4 21.7 21.7 21.4 22.0 22.2 22.122.022.222.421.221.021.021.221.021.221.722.021.
02:30 21.4 21.6 21.7 21.4 21.9 22.2 22.121.9 22.2 22.4 21.2 20.9 21.0 21.2 21.0 21.2 21.7 22.0 21.;
02:45 21.421.1621.721.421.922.222.121.922.222.421.220.921.021.120.921.221.722.021.;
03:00 21.421.621'.621.421.922.122.121.922.122.321.120.921.021.120.921.221.721.921.;
03:15 21.4 21.6 21.6 21.4 21.9 22.122.0 21.9 22.122.3 21.120.8 21.0 21.120.9 21.2 21.6 21.9 21.'
03:30 21.421.621.621.321.922.122.021.922.122.321.120.821.021.120.921.121.621.921.'
03:45 21.4 21.5 21.6 21.3 21.9 22.122.0 21.9 22.122.3 21.120.8 21.0 21.120.8 21.121.6 21.9 21.'
04:00 21.4 21.5 21.6 21.3 21.8 22.122.0 21.9 22'.0 22.3 21.120.7 21.0 21.120.8 21.121.6 21.9 21.1
04:15 21.4 21.5 21.6 21.3 21.8 22.122.0 21.9 22.0 22.3 21.120.7 21.0 21.120.8 21.121.6 21.9 21.(
04:30 21.5 21.5 21.6 21.3 21.8 22.0 21.9 21.8 22.0 22.3 21.120.6 21.021.120.8 21.121.5 21.9 2D
04:45 21.5 21.5 21.6 21.3 21.8 22.0 21.9 21.8 22.0 22.3 21.120.6 21.0 21.120.8 21.0 21.5 21.8 21.1
I'ti., //Y.r. to.,+,...,]_. .1- _.. ---.I /---- 1]-3-3 --7-1n 0_r.-__a_.1- a___1 0 . . - n _,.. -- -----
.... .... ... .. ..�
' _�...... ...___ '-_--- --- �.... ...� ....... •. _ _ `. �.�i , i. Li+ i .... .. u�� i i+a u . i 1 \1\ ♦ L711�1\ . ii.i.i.�. A CI6G L. Vl -f
05:00 21.4 21.5 21.5 21.3 21.8 22.0 21.9 21.8 22.0 22.2 21.120.6 21.0 21.120.8 21.0 21.5 21.8 21.1
05:15 21.4 21.5 21.5 21.3 21.7 22.0 21.9 21.8 22.0 22.2 21.120.6 21.0 2.1.120.8'21.0 21.5 21.8 2D
05:30 21.4 21.5 21.5 21.3 21.7 22.0 21.9 21.8 21.9 22.2 21.120.6 21.0 21.120.8 21.0 21.5 21.8 2D
05:45 21.4 21.4 21.5 21.3 21.6 21.9 21.9 21.8 21.9 22.2 21.120.6 21.0 21.120.7 21.0 21.4 21.8 21.(
06:00 21.4 21.4 21.5 21.3 21.6 21.9 21.9 21.8 21.9 22.2 21.120.6 21.0 21.120.7 21.0 21.821.(
06:15 21.4 21.4 21.4 21.3 21.6 21.9 21.8 21.8 21.9 22.2 21.120.6 21.0 21.120.7 21.0 21.821.1
06:30 21.4 21.4 21.4 21.3 21.5 21.9 21.8 21.7 21.9 22.2 21.120.6 21.0 21.120.7 21.0 21.821.(
06:45 21.3 21.4 21.3 21.3 21.5 21.9 21.8 21.7 21.9 22.2 21.120.7 21.0 21.0 20.7 20.9 21.821.:
07:00 21.3 21.4 21.3 21.3 21.5 21.9 21.8 21.7 21.9 22.2 21.120.8 21.0 21.0 20.7 20.9 21.821.:
07:15 21.3 21.4 21.3 21.2 21.5 21.9 21.8 21.7 21.9 22.2 21.120.8 21.0 21.0 20.7 20.9 21.821.:
07:30 21.2 21.4 21.2 21.2 21.5 21.9 21.8 21.6 21.9 22.2 21.120.9 21.0 21.0 20.6 20.9 21.821.:
07:45 21.221.421.221:221.521.921.821.621.922.221.120.921.021.020.620.9 21.821.:
08:00 21.121.4 21.2 21.2 21.5 21.9 21.8 21.7 21.9 22.2 21.120.9 21.0 21.0 20.7 20.9 21.821.:
08:15 21.121.4 21.2 21.2 21.5 21.9 21.8 21.7 21.9 22.2 21.120.9 21.0 21.0 20.7 20.9 21.821.:
08:30 21.121.4 21.2 21.121.5 21.9 21.8 21.7 21.9 22.2 21.2 20.9 21.0 21.0 20.7 20.9 21.821.:
08:45 21.0 21.4 21.2 21.121.5 21.9 21.9 21.7 21.9 22.2 21.2 20.9 21.0 21.0 20.7 20.9 21.821.-
09:00 21.0 21.4 21.121.121.5 21.9 21.9 21.8 21.9 22.2 21.2 20.9 21.0 21.0 20.7 20.9 21.821.E
09:15 21.121.4 21.121.121.5 22.0 21.9 21.8 21.9 22.3 21.2 20.9 21.0 21.120.7 20.9 21.821.E
09:30 2i.1 21.5 21.2 21.2 21.6 22.0 22.0 21.9 22.0 22.3 21.3 20.9 21.0 21.120.8 21.0 21.821.E
09:45 21.2 21.5 21.2 21.2 21.6 22.0 22.0 22.0 22.122.3 21.3 21.0 21.0 21.1 21.1 21.921.'
10:00 21.3 21.6 21.3 21.2 21.8 22.122.122.122.122.3 21.4 21.0 21.0 21.1 21.2 21.6 21.9 22.1
10:15 21.4 21.7 21.4 21.3 21.9 22.2 22.2 22.122.2 22.2 21.4 21.121.0 21.1 21.3 21.7 22.0 22.'
10:30 21.5 21.8 21.6 21.4 22.0 22.3 22.4 22.2 22.3 22.2 21.5 21.2 21.0 21.1 21.5 21.8 22.122.
10:45 21.6 21.9 21.7 21.5 22.2 22.4 22.5 22.3 22.4 22.2 21.5 21.3 21.121.1 21.621.922.222.:
11:00 21.822.121.821.622.322.622.722.422.422.221.621.321.221.121.221.722.022.322.:
11:15 21.9 22.2 21.9 21.8 22.7 22.8 22.6 22.5 22.121.8 21.4 21.3 21.121.3 21.9 22.122.4 22.
11:30 22.0 22.0 22.121.9 22.8 22.9 22.7 22.6 22.2 21.9 21.4 21.4 21.121.5 22.0 22.2 22.5 22.
11:45 22.121.6 22.122.0 22.5 23.0 23.0 22.8 22.5 22.2 22.2 21.5 21.5 21.2 21.6 21.7 22.0 22.2 22.
12:00 22.2 21.5 21.7 21.8 22.6 22.3 23.122.9 22.0 22.2 22.2 21.5 21.6 21.3 21.7 21.6 21.8 21.9 22.
12:15;22.221.521.721.822.722.023.123.022.122.222.221.621.721.321.721.621.721.722.
12:30 22.3 21.5 21.7 21.8 22.7 22.0 23.2 23.2 22.2 22.3 22.2 21.6 21.7 21.4 21.8 21.6 21.7 21.7 22.
12:45 22.321.721.721.822.822.023.323.322.222.322.221.721.821.521.921.621.721.722.:
13:00 22.3 21.9 21.8 21.8 22.8 22.0 23.4 23.4 22.3 22.3 22.5 21.7 21.9 21.6 21.8 21.9 21.9 21.9 22.:
13:15 22.2 21.9 22.0 22.0 22.7 22.3 23.4 23.5 22.5 22.5 22.6 21.8 22.0 21.7 21.8 22.0 22.122.1 22.:
13:30 22.2 21.9 22.0 22.1 22.5 22.4 23.5 23.6 22.6 22.7 22.7 21.9 22.0 21.8 21.8 22.0 22.1 22.2 22.:
13:45 22.2 21.9 22.0 22.1 22.4 22.5 23.5 23.7 22.6 22.6 22.6 22.0 22.0 21.8 21.8 22.0 22.1 22.2 22.:
14:00 22.2 21.9 22.0 22.1 22.5 22.5 23.6 23.7 22.6 22.6 22.6 22.1 22.0 22.0 21.9 22.0 22.1 22.1 22.:
14:15 22.2 21.9 22.1 22.1 22.5 22.5 23.6 23.7 22.6 22.5 22.6 22.2 22.0 22.1 21.9 22.0 22.1 22.1 22.:
14:30 22.3 22.0 22.2 22.2 22.5 22.5 23.6 23.7 22.6 22.6 22.6 22.2 22.0 22.1 22.0 22.0 22.1 22.1 22.:
14:45 22.3 22.0 22.2 22.2 22.5 22.5 23.6 23.7 22.6 22.6 22.7 22.2 22.0 22.1 22.1 22.0 22.1 22.1 22.:
15:00 22.4 22.0 22.2 22.2 22.4 22.5 23.6 23.6 22.7 22.7 22.8 22.2 22.1 22.1 22.1 22.0 22.0 22.1 22.:
l,rr,-,•//,,...,,pro,-rl�r� „�„� ..,,..i i....naa ,.a_i� v_r��__� _L._� o__.._:..a_�i o__?�_ ._ . .,,, .�„r.,. ,,,,,,,. ,,.,.,,,.
15:15 22.4 22.0 22.2 22.2 22.4 22.5 23.6 23.5 22.7 22.7 22.8 22.2 22.1 22.1 22.1 22.0 22.1 22.1 22.*
15:30 22.4 22.0 22.2 22.2 22.3 22.5 23.6 23.5 22.7 22.7 22.7 22.2 22.1 22.1 22.2 22.0 22.1 22.2 22.:
15:45 22.4 22.0 22.2 22.3 22.3 22.5 23.5 23.4 22.7 22.7 22.7 22.3 22.1 22.0 22.2 22.0 22.1 22.2 22.:
16:00 22.4 22.0 22.2 22.3 22.3 22.5 23.4 23.4 22.6 22.7 22.7 22.3 22.1 22.0 22.3 22.0 22.1 22.2 22.:
16:15 22.1 22.0 22.2 22.2 22.3 22.5 23.4 23.3 22.6 22.7 22.8 22.4 22.1 21.9 22.3 22.0 22.1 22.2 22.:
16:30 21.6 22.0 22.1 22.2 22.2 22.5 23.3 23.2 22.7 22.7 22.7 22.3 22.1 22.0 22.3 22.0 22.1 22.2 22.:
16:45 21.5 22.0 22.1 22=22.1 22.5 23.2 23.2 22.7 22.7 22.7 22.3 22.1 22.0 22.2 22.0 22.1 22.2 22.1
17:00 21.4 22.0 22.1 22'?22.1 22.5 23.1 23.2 22.7 22.7 22.7 22.3 22.1 22.1 21.9 22.0 22.1 22.2 22.(
17:15 21.5 22.0 22.1 I21.4ir22.1 22.5 23.1 23.2 22.6 22.7 22.7 22.2 22.1 22.1 21.8 22.0 22.1 22.2 22.:
17:30 21.5 22.0 22.1 222=22.122.5 23.0 23.3 22.7 22.6 22.7 22.2 22.1 22.0 21.8 22.0 22.1 22.2 22.,
17:45 21.6 22.0 22.0 22 22.1 22.5 23.0 23.3 22.7 22.6 22.7 22.2 22.122.0 21.8 22.0 22.1 22.2 22.1
18:00 21.6 21.9 22.1,', 2.122.5 22.9 23.4 22.7 22.6 22.7 22.122.121.9 21.8 22.0 22.1 22.2 22.:
18:15 21.7 21.9 22.122.2 22.122.5 22.9 23.4 22.7 22.5 22.7 22.1 22.121.9 21.8 22.0 22.1 22.2 22.:
18:30 21.7 21.9 22.122j2 22.122.5 22.9 23.4 22.7 22.5 22.7 22.0 22.1 21.8 21.8 22.0 22.122.2 22.:
:"*, .
18:45 21.8 21.9 22.1 2 22.1 22.5 22.9 23.3 22.7 22.5 22.7 22.0 22.1 21.8 21.8 22.122.2 22.2 22.:
19:00 21.8 21.9 22.0 22.4 22.1 22.6 22.8 23.2 23.0 22.5 22.8 21.9 22.121.8 21.8 22.3 22.3 22.4 22.'
19:15 21.8 22;,0 2 a� 22.5 22.1 22.7 22.8 23.123.122.5 22.8 21.9 22.121.8 21.8 22.5 22.4 22.5 22.'
19:30 21.9 2210' 221Y: 22.7 22.1 22.8 22.8 23.123.0 22.5 22.7 21.9 22.1 21.7 21.8 22.8 22.6 22.6 22.1
19:45 21.9 2 221` 22.8 22.1 23.0 22.8 23.0 23.0 22.5 22.4 21.8 22.121.7 21.8 22.9 22.7 22.7 22.(
20:00 21.9 22.022 22.7 22.1 23.2 22.7 22.9 22.9 22.5 22.1 21.8 22.121.6 21.8 22.9 22.8 22.8 22.:
20:15 21.9 22.122.4 22.6 22.1 23.4 22.7 22.9 22.9 22.5 21.9 21.7 22.0 21.6 21.7 22.8 22.8 22.7 22..
20:30 22.0 22.2 22.4 22.5 22.123.4 22.7 22.9 22.9 22.4 21.8 21.7 22.0 21.6 21.7 22.7 22.7 22.7 22..
20:45 21.9 22.3 22.3 22.5 22.123.3 22.6 22.8 22.8 22.3 21.8 21.7 21.9 21.5 21.7 22.6 22.6 22.6 22.-
21:00 21.9 22.4 22.1 22.4 22.1 23.2 22.6 22.8 22.8 22.3 21.8 21.6 21.7 21.5 21.6 22.5 22.6 22.5 22.:
21:15 21.9 22.3 22.0 22.4 22.123.122.5 22.7 22.7 22.3 21.8 21.6 21.5 21.5 21.6 22.4 22.5 22.5 22.:
21:30 22.0 22.2 21.9 22.4 22.123.0 22.5 22.7 22.9 22.2 21.8 21.6 21.5 21.4 21.5 22.4 22.5 22.4 22.1
21:45 22.122.121.7 22.3 22.122.9 22.3 22.7 22.7 22.2 21.8 21.5 21.4 21.4 21.5 22.4 22.4 22.3 21.
22:00 22.1 22.1 21.6 22.3 22.122.8 22.1 22.6 22.7 22.2 21.7 21.5 21.4 21.4 21.5 22.3 22.4 22.1 21.1
22:15 22.1 22.0 21.5 22.3 22.1 22.8 22.0 22.6 22.7 22.1 21.7 21.5 21.4 21.4 21.5 22.3 22.4 22.1 21.'
22:30 , 22.0 22.0 21.5 22.2 22.2 22.7 21.9 22.6 22.6 22.121.7 21.5 21.4 21.3 21.4 22.2 22.3 22.12 1.
22:45 22.0 21.9 21.4 22.2 22.4 22.7 21.9 22.5 22.6 22.0 21.7 21.4 21.3 21.3 21.4 22.2 22.3 22.121.1.
23:00 22.0 21.9 21.4 22.2 22.6 22.6 22.0 22.5 22.5 21.9 21.7 21.4 21.3 21.3 21.4 22.122.3 22.122.1
23:15 21.9 21.9 21.4 22.2 22.7 22.6 22.0 22.5 22.5 21.9 21.7 21.4 21.3 21.3 21.4 22.122.2 22.122.1
23:30 21.9 21.8 21.4 22.122.6 22.6 22.0 22.4 22.5 21.9 21.6 21.3 21.3 21.2 21.4 22.0 22.2 22.0 22.(
23:45 21.9 21.8 21.4 22.122.6 22.5 22.122.4 22.6 21.9 21.6 21.3 21.3 21.2 21.3 22.0 22.2 22.0 22.(
24:00 21.9 21.8 21.4 22.122.5 22.5 22.2 21.4 22.8 21.9 21.5 21.3 21.2 21.2 21.3 22.0 22.2 22.122.1
COUNT 96 96 96 96 94 96 96 96 96 96 96 96 96 96 91 96 80 96 96
MAX 22.4 22.4 22.4 22.8 22.8 23.4 23.6 23.7 23.122.7 22.8 22.4 22.122.122.3 22.9 22.8 22.8 22.1
MIN 21.0 21.4 21.121.121.5 21.9 21.8 21.6 21.9 21.9 21.120.6 21.0 21.0 20.6 20.9 21.4 21.7 21.:
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DATE: 07-04-2002
TIME: 01-34:-53
CAROLINA POWER & LIGHT
WAITERS ELECTRIC GENERATING PLANT
DAILY GENERATION LOG FOR 07-03-2002
ee OPERATOR -
Cf� OPE OR
TIDE
I UNIT 1
IGROSS AUX
1 UNIT
IGROSS
2
1 UNIT 3
IHOUSEISTATNI
# 1
I M 2
I# 3
1PLANT IPLANTIPLAW1
0 1.
1 0 2
1 W 3
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AUX IUNIT
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I GEN
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LEVEL
WATER
1.3 Org 1
02 1
----
--------------------------
---
I 121aH
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I 14TaH
----
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01:00
02:00
6
7
0
0
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0
0
0
0
0
0
6
0
0
6
5
0
8
0
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8
2249.7
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0.0
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03,00
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7
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7
7
0
8
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04:00
6
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65:00
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06:00
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8:
2249.8
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0.0
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07:00
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7
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7
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08:00
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6
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2249.9
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0
0
25
25
0
50
50
0
1B
18
0
0
35
2249.9
1386.1
0.0
0.0
14:00
26
0
37
1
g
0
0
0
0
36
36
0
72
72
0
26
26
0
0
52'
2249.6
1386.1
0.0
0.0
15:*'
0
0
36
0
32
0
0
0
26
36
9
71
7x
1
19
28
1G
0
57
2249.3
1388.1
0.0
0.0
16:**
0
0
36
0
327
0
0
0
0
36
32
68
68
0
0
26
23
0
49:
2249.0
1386.1
0.0
0.0
17:**
0
0
35
0
34
0
1
0
36
32
67
66
1
0
26
23
0
49
224a.7
1386.1
0.0
0.0
18:**
0
0
36
0
34
0
0
0
Ct
35
34
69
69(
0
0
25
24
0
49
2248.g
1386.1
0.0
0.0
0
34
0
29
0
0
0
0
36
34
70
7Q
0
0
26
24
0
50
2248:.3
1386.1
0.0
0.0
0
0
0
0
0
34
29
63
63
0
0
24
21
0
45
2248.1
1386.1
0.0
6.0
21:**
G
0
5
0
a
0
0
0
0
0
0
8
Q
8
81
0
0
9
0
0
u
2246.2
1386.1
0.0
0.0
22:**
0
0
5
0
0
0
0
0
0
G
0
5
0
5
5
0
Q
7
0
0
7
224B.4
1386.1
0.0
0.0
23:**
0
0
4
0
0
0
0
0
5
0
5
5
0
0
7
0
0
7
2248.6
1386.1
0.0
0.0
24:"*
0
5
0
00
0
0
4
0
4
4
0
0
6
0
0
6
2248.8
1386.1
0.0
0.0
----------.
0
0
5
Q
5
5
0
0
7
0
0
7
2249.0
1386.1
0.0
0.0
-CC__--
143
---.+----.--------s-----------------------
-------------------------------------
.i--�--i----�-_-----------------------------------
otals
0
302.
1
170
0
0
2
143
301
170
612
615
3
143
235
125
0
503
12 PREY MWH UNIT UNIT HOURS T I M E TEMP / RAIN
GENERATOR MID- NIGHT DTFF. STARTS HOURS OUT OF
(NIGHT GENERT COMTSS SYNC Mr. SYNC RET. SYNC RET. SYNC RET. ]PLANT DAM.
NO. 1
NO. 2
NO. 3
HOUSE GEN
GROSS
NO. 1 AUX
NO. 2 AUX
NO. 3 AUX
3TRTP TRANS
TOTAL AUX
NET MWH
PLANT
WATER
FOURS
FLpW'
GENERAT
BYPASS
0
TEMP MAX
TEMP MIN
TEMP @ OBSN
SNOWFALL
-' SNOW GROSS
RAIN MTD
RAIN TODAY
RAIN MNTH TOT
RAIN Y'PD
RAIN TODAY
RAIN YEAR TOT
DATE: 07-03-2002
TIME: 00,11:4.6
CAROLINA POWER & LIGHT
WALTEF�S-ELECTRIC GEN$RATING PLANT
DAILY dEAERATION LOG 'FOR 0.7_-02n2002;..
RATOR
1 UNIT 1
I UNIT
2
1 UNIT
3
1HOUSE ISTATNI
A l I
A 2 1
it 3
1 PLANT I PLANT I PLANT I
# 1
TIME
IGROSS
AUX
IGROSS
AUX
IGROSS
AUX
I GEN I
AUX I
NET I
NET I
NET
I NET
IGROSS I
AUX IUNIT
READ
I MWH
MWH
I MWiH
MWH
I 2'iti1H
MVIH
I 14RH I
W?H I
MWH I
MWH I
14WH
I MOH
I 14KH I
"R I
DSF
---
----------------------------------------
01:00
4
0
0
0
0
---------------------------------------------------
0
a
0
4
0
0
4
4
0
6
02:00
4
0
a
0
0
0
a
0
4
0
a
4
4
0
6
03:00
3
0
a
0
0
0
a
0
3
0
0
3
3
0
6
04.:00
4
0
0
0
a
0
0
1
4
0
0
3
4
1
6
05:00
4
0
a
0
a
0
0
0
4
0
a
4
4
0
6
06:00
3
1
a
0
a
0
0
0
z
0
a
2
3
1
6
07:00
4
0
0
0
0
0
0
0
4
0
0
4
4
0
6
08:00
4
0
0
a
0
0
0
0
4
0
a
4
4
0
6
09:00
3
0
a
0
0
0
a
0
3
0
0
3
3
0
6
10:00
4
0
0
0
0
0
0
0
4
0
0
4
4
0
6
11:00
4
0
0
0
0
0-
0
0
4
0
0
4
4
0
6.
12:00
31
0
35
0
0
0
0
0
37'
35
0
72
72
0
27
13:00
37
0
35
0
0
0
a
0
37
35
a
72
72
0
27
14:00
35
0
34
0
a
0
0
0
35
34
a
69
69
0
25
15:00
35
0
34 '
0
0
0
0
0
35
34
a
69
69
0
25
16:00
36
0
35
0
a
0
a
1
36
35
0
70
71
1
26
17:00
36
0
36
0
a
0
0
0
36
36
a
72
72
0
26
18:*',
36
0
34
0
a
0
0
0
36
34
0
10
70
0
26
19:00
36
0
33
0
0
0
0
a
36
33
0
69
69
0
26
20:`00
22
0
11
0
0
0
0
0
22
11
0
3J
33
0
17
21:00
7
0
a
0
a
0
0
0
7
0
0
7
1
0
8
22:00
6
0
0
0
0
0
a
0
6
b
0
6
6
0
8
23:00
7'
0
0
0
0
0
0
0
7
0
a
7
7
0
8
0
6
0
00
a
0
0
0
6
0
0
6
6
0
8
24.0
--------- -------------------------------------------- ----------------------------- --------
Totals 377 1 287 0 a a 0 z 316 281 0 661 664 3
1 4�
I# 3
IHOUSEITOTALI
MAKE I
TAIL I
RIVERI
DISS I
(UNIT
(UNIT
I GEN
IPLANTI
LEVELI
WATERI
FLO'A 1
02 1
1 DSF
I DSF
I USE
I DSF I
FEET I
FEET I
CFS I
PCT I
- 0
----------------------------�------------
0
0
6
2251.2
1386.1
0.0
0.0
0
0
0
6
2251.2
1886.1
0.0
0.0
0
0
0
6
2251.3
1386.1
0.0
0.0
0
0
0
6.
2251.3
1386.1
0.0
0.0
0
0
0
6
2251.3
1386.1
0..0
0.0
0
0
a
6
2251.3
1386.1
0.0
0.0
0
a
0
6
2251.3
1386.1
0.0
0.0
0
0
0
6
2251.4
1386.1
0.0
0.0
0
0
0
6
2251.4
1386.1
0.0
0.0
0
0
0
6
2251.4
1386.1
0.0
0.0
0
0
0
6
2251.5
1386.1
0.0
0.0
25
0
0
52
2251.2
1386.1
0.0
0..0
25
0
0
5Z,
2250.0
1386.1
0.0
0.0
24
a
0
49
225.0.6
1386.1
0.0
0.0
24
0
0
49
2250.4
1386.1
0.0
0.0
25
0
0
51
2250.1
1386.1
0.0
d.0
26
0
d
52
2249.8
1386.1
0.0
0.0
24
a
0
50
2249.5
1386.1.
0.0
0.0
24
0
0
Sa
2249.5
1386.1
0.0
0.0
1,
0
0
2$
2249.4
1386.1
0.0
0.0
0
a
0
8
2249.4
1386.1
0.0
0.0
0
a
0
&
2249.5
1386.1
0.0
0.0
0
0
0
&
2249.5
1386.1
0.0
0.0
a
0
0
5
2249.6
1386.1
0.0
0.0
323 208 a 0 531.
I12 PREY MWH UNIT UNIT HOURS T I M E
GENERATOR MIb- NIGHT DIFF. STARTS HOURS OUT OF
NIGHT GENERT COMISS SYNC RET. SYNC RET. JI
SYNC RET. SYNC RET.
NO. 1
NO. 2
N0. 3
5OUSE.GEN
GROSS
NO. 1 AUX
NO. 2 AUX
NO. 3 AUX
STRTP TRANS
TOTAL AUX
N'ET MWH
PLANT
WATER
HOURS
FLOW
GENERAT
BYPASS
.00
TEMP / RAIN
TEMP MAX
TEMP MIN
TEMP @ OBSN
SNOWFALL
SNOW GROSS
RAIN MTD
RAIN TODAY
RAIN MNTH TOT
RAIN YTD
RAIN TODAY
RAIN YEAR TOT
PLANTI DAM.
DATE: 07"02-2002
TIME: 60:00:04
CAROLINA POWER •6 LIGHT
WALTER$-ELEr,T-RIC GENERATING PLANT
DAILY GENERATION LOG FOR 07-OL-f2.002
_ 1%1-y ,hod c�
OPERATOR
I UNIT 1
I UNIT 2
1 UNIT 3
1 HOUSE I STATN I
# 1.
1# 2
1 4 3
1 PLANT I PLANT I PLANT I
# 1
I 1 2
TIME
IGROSS
AUX
IGROSS
AUX
IGROSS
AUX
I GEN I
AUX I
NET
I NET
I NET
I NET
IGROSSI
AUX IUNIT
IUNIT
READ
I 144H
---------
MWH
I 14WH
---------------
MWH
I 24WH
-----------
M4IH
I 14WH I
MWH I
24WH
I MYIH
I NWH
I KKH
I MOH I
I*JH I
DSF
I DSF
01:00
4
0
0
0
0
0
--------------------------------------------'-----:----
0
0
4
0
0
4
4
0
6
0
02:00
3
0
0
0
0
0
0
0
3
0
0
3
3
0
6
0
03:00
3
0
0
0
0
0
0
0
3
0
0
3
3.
0
6
0
04:00
3
0
0
0
0
0
0
1
3
0
0
2
3
1
6
0
05:00
3
0
0
0
0
0
0
0
3
0
0
3
3
0
6
0
06:00
3
0
0
0
0
0
0
0
3
0
0
3
3
0
6
0
07:00
4
0
0
0
0
0
0
0
4
0
0
4
4
0
6
0
08:00
3
0
0
0
0
0
0
0
3
0
0
3
3
0
6
0
09:00
3
0
0
0
0
0
0
0
3
0
0
3
3
0
6
0
10:00
3
0
0
0
0
0
0
0
3
0
0
3
3
0
6
0
11:00
4
0
0
0
0
0
0
0
4
0
0
4
4
0
6
0
12:00
3
0
0
0
0
0
0
0
3
0
0
3
3
0
6
0
13:00
3
0
0
0
0
0
0
0
3
0
0
3
3
0
6
0
14:00
3
0
0
0
0
0
0
0
3
0
0
3
3
0
6
0
15:00
4
0
l0
0
0
0
0
0
4
0
0
4
4
0
6
0
16:00
13
0
5
0
0
0
0
1
13
5
0
17
18
1
lz
8
17:00
34
0
19
0
0
0
0
0
34
19
0
53
53
0
24
15
18:00
27
0
17
0
0
0
0
0
27
17
0
44
44
0
20
14
19:00
'60
19
0
11
0
0
0
0
0
19
11
0
30
30
0
la
11
-20 '
7
0
6
0
0
6
0
0
7'
6
0
13
13
0
9
8
21:00
5
0
1
0
0
0
0
0
5
1
0
6
6
0
8
5
22:00
4
0
0
0
0
0
0
4
0
0
4
4
0
6
0
23:00
4
0
0
0
0
0
0
0
4
0
0
4
4
0
6
0
24:00
3
0
0
0
0
0
0
0
3
0
0
3
3
0
6
0
--..----------------------------------------
-------------- i-------------------------
...---------------`--
Totals
165
0
59
0
0
0
0
2
165
59
0
222
224
2
196
61
Z�Q�_
OPERATOR
# 3
IHOUSEITOTALI
LAKE I
TAIL I
RIVER[
DISS I
IUNIT
I GEN
IPLANTI
LEVELI
WATERI
FLOW 1
02 1
1 DSF
I DSF
I DSF I
FEET I
FEET I
CFS I
PCT I
0
0
6
2250.9
1386.1
040
0.0
0
0
6
2280.9
1386.1
0.0
0:0
0
0
6
2251.0
1386.1
040
0.0.
0
0
6
2251.1
1386.1
0.0
0.0
0
0
6
2251.1
1386.1
0.0
0.0
0
0
6
2251.1
1386.1
0.0
0.0
0
0
6
2251.1
1386.1
0.0
010
0
0
6
2251.2
1386.1
0.0
0.0
0
0
6
2251.3
1386.1
010
0.0
0
0
6
2251.3
1386.1
0.0
0.0
0
0
6
2251.3
1386.1
0.0
0.0
0
0
6
2251.3
1386.1
0.0
0.0
0
0
6
2251.3
1386.1
0.0
0.0
0
0
F
2251.4
1386.1
0.0
0.0
0
0
6
2251.5
13$6.1
0.0
0.0
0
0
20
2251.4
2386.1
0.0
0.0
Q
0
39
2251.3
1386..1
0.0
0.0
0
0
34
2251.1
1386.1
0.0
0,0
0
0
26
2251.0
1386.1
0.0
010
0.
0
17
2251.0,1586.1
0.0
0.0
0
0
13
2251.1
1386.1
0.0
0.0
0
0
6
2251.1
1386.1
010
0.0
0
0.
6
2251.1
1386.1
0.0
0.0
0
0
6
2251.1
i-------------------
1386.1
0.0
0.0
0
0
257
1 12 PREV I MWH I UNIT UNIT HOURS I T I M E
GENERATOR �MIGHT NIGHT I DIFF. I STARTS HOURS OUT OF'
GENERT COMISS SYNC RET.:SYNO RET. SYNC RET. SYNC RET.
NO. 1
NO. 2
NO. 3
HOUSE GEN
GRASS
NO. 1 ANX
NO. 2 AUX
NO. 3 AUX
STRTP TRANS
TOTAL AUX
NET MWH
e 1,1�4a0
21ANT
WATER
HOURS
FLOW
GENERAT
BYPASS
uw.a a
TEMP % RAIN
PLANT DAM'.
TEMP MAX
TEMP MIN
TEMP 0 OBSN
SNOWFALL
SNOW GROSS
RAIN MTD
RAIN TODAY
RAIN MN_TH TOT
RAIN YTD
RAIN TODAY
RAIN YEAR TOT
. 6
O
O'
%N A rF Michael F. Easley, Governor
0�0 9pG William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
co 7 Gregory J. Thorpe, Ph.D., Director
>_ Division of Water Quality
October 9, 2001
b�
;
�
Mr. Barry Arney, Manager, Hydro Operations
CP&L--Progress Energy
179 Tillery Dam Road
Mt Gilead, NC 27306
Dear Mr. Arney:
The Division of Water Quality has reviewed the attached revised fish tissue protocol for the Walters Hydroelectric Project
(FERC Project No. 432), and concur with the revisions which describe reduced sampling based on the change in the fish
consumption advisory.
Sincerely,
7
Coleen H. ullins, Chief
Water Quality Section
cc: Jimmie Overton
Mark Hale
�-orr� e� st,West`aII�ARO
OCT
18 2001
'::'rlR1ABIAI n PSrEYl4� I
N. C. Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 (919) 733-7015
V*A
NCDENR
Customer Service
1 800 623-7748
=r
t03 Progress Energy
June 30, 2005
Mr. Keith Haynes
NC DENR Asheville Region
2090 US Highway 70
Swannanoa, NC 28778
Dear Mr. Haynes:
ffE
_ 5 2005]
WATER QUALITY SECTION
ASHEVILLE REGIONAL OFFICE
We spoke by telephone on June 28, 2005 about Progress Energy's pad mount transformer
inspection and maintenance program. Transformer Maintenance Field Services, Inc. is
conducting this program for Progress Energy.
The program involves a field -inspection. If a pad mounted transformer is found to have
dirt or;debris on°it this is removed, to prevent corrosion. The transformer casing is sanded,
repaired and painted as needed: The purpose of this program is to°'iiriprove the reliability
of the equipment and to`prevent oil'spills thdt can occur from corrosion.
If Transformer Maintenance finds a transformer that is leaking for any reason, they are
instructed to contact Progress Energy prior to perfonning any maintenance. Progress
Energy will then inspect the equipment and determine if it requires change out. If change
out is required, Progress Energy contacts the customer to schedule an outage and
transformer replacement. This process will result in more than a 24 hour delay from the
time that Transformer Maintenance discovers the leak and Progress Energy can schedule a
replacement of the transformer.
Progress Energy interprets the NC Oil Pollution and Hazardous Substances Control Act of
1978 to require reporting to NC DENR of any spill that cannot be cleaned up within 24
hours. We discussed four examples on June 28 (these were Crestview and Garden View
Street, the Hotspot Service Station on Highway 19 and 23, the Food Lion on Highway 19
and 23, and the library, all in Canton.) Two of these leaks were very small and oil was
only visible on the transformer itself and the concrete pad. None had reached the ground
or", any -water- source.' The other, two were, leaks where a,small ,quantity of oil had reached
the ground' but `h6t- any water -source.'Both of thesc cases had `resulted iri' oil " tams :on° th6
ground that:Were':less thantwo feet iri diameter:
As discussed, other than the 24 hour cleanup requirement, these minor spills would not
Progress Energy Carolinas, Inc.
P.O. Box 1551
Raleigh, NC M02
below the 5.0 mg/L threshold given in the FERC Order are well within the known short-term tolerance
limits of aquatic life. No adverse environmental impacts were observed or reported resulting from the
incidents described in this letter.
Progress Energy has been monitoring dissolved oxygen provisional data on a regular basis during
the monitoring season with the goal of quickly identifying any variances of this nature. As noted above,
we re-examined these provisional data during the time of these incidents and found that these provisional
data had not indicated any excursions below 5.0 mg/L. These provisional data were adjusted by the
USGS in accordance with its standard calibration practices prior to publishing these data as final, and we
discovered the incidents after the fact on January 24, 2005.
Progress Energy will continue to evaluate the USGS dissolved oxygen data on a regular basis with
the goal of quickly identifying any variances of this nature in the future. We plan to discuss data
calibration adjustments with the USGS to determine if there is a more efficient way to detect DO
variances within a short period after the data are collected.
Please see attached USGS provisional data and Walters Plant operating logs for details. The
attached USGS provisional data includes dissolved oxygen, temperature, and stream flow data as
measured at the USGS Gage No. 03460795, Pigeon River below power Plant near Waterville, N.C. If
You have any questions or comments regarding this matter, please call Mr. Larry Mann at (910) 439-
521 1, extension 1202.
Sincerely,
6&"' A kZ4-
Garry A. Whisnant, P.E.
Manager, Hydro Operations
c: Mr. David McKinney- Tennessee Wildlife Resources Agency
Mr. Robert Fletcher — FERC-Washington
Mr. Jerrold W. Gotzmer, P.E. - Director— FERC-Atlanta Regional Office
Mr..Anthony Masters — FERC-ARO
r _IVfr. Roger Edwards —NC Division of Water Quality
Mr. Steve Reed — NC Division of Water Resources
Mr. Larry Mann — CP&L
Mr. David McKinney
Tennessee Wildlife Resources Agency
P.O. Box 40747
Nashville, Tennessee 37204
Mr. Robert Fletcher
Federal Energy Regulatory Commission
Mail Code: DPCA, HL-21.1
888 First Street, NE
Washington, D.C. 20426
Mr. Jerrold W. Gotzmer, P.E.
Director - Atlanta Regional Office
Federal Energy Regulatory Commission
3125 Presidential Parkway - Suite 300
Atlanta, Georgia 30340
Mr. Anthony Masters
Federal Energy Regulatory Commission
3125 Presidential Parkway - Suite 300
Atlanta, Georgia 30340
Mr. Roger Edwards
Acting Supervisor— Western Regional Office
North Carolina Division of Water Quality
59 Woodfin Place
Asheville, N.C. 28801
Mr. Steven E. Reed
North Carolina Department of Environment and Natural Resources
Division of Water Resources
1611 Mail Service Center
Raleigh, North Carolina 27699-1611
r ti
WALTERS/MARSHALL OPERATION SHIFT LOG
Day/Date: 0600 08/17/04 thru 0600 08/18/04
OPERATOR: 0600-1800 Nease Leatherwood
1800- 06 00 Randall Arrowood
Walters Plant:
1. WR#00136792 Tainter Gate Control at dam -when water elevation drops to around 2248.0 we start receiving
faulty alarms 1128/04
2. W0#00554626 on unit 2 TIV. 04/27/04
3. WO#00535025 working seal on No. 3 TIV doesn't close sometime until weight in cabinet is moved. 6/2/04
COMMENTS:
Walters Plant:
WR#00137055 Unit 2 butterfly valve house lights. 03/10/04
WR#00137546 TIV oil should not turn off when #39 lever is moved from auto to manual. 3/15/04
WR#00137548 DC Exciter Panels on balcony need covers. 3/15/04
Caution tag on unit 3 regulator selector switch on balcony. (03/17/04)
Caution tag on unit 3 cutler hammer regulator control switch on bench board. (03/17/04)
Marshall Plant:
Marshall Unit 1 Off -line -Hydro Clearance # 23-2000. Speed Increaser & Generator Clearance # 04-2001 for re-
installing speed increaser. Expected to return to service 2nd quarter 2005.
Fish Lock on Local 07/12/04
Caution tag #01 Sluice gate A Breaker Open. 03/03/04
Caution tag #02 Sluice gate B Breaker Open 03/03/04
Caution tag #03 Upper fish lock Breaker Open. 03/03/04
Caution tag #04 Lower fish lock Breaker Open 03/03/04
Marshall clearance #00009 on primary cooling water A pump (6/l/04)
WR # 00155395 on Marshall Pond elevation is .2 lower than reading on Walters computer screen.
LAKE LEVELS: Full Pond 06:00 18:00 06:00
Walters 2258.6 2255.7 2254.9 2255.1
Marshall 1624.0 1622.4 1622.4 1622.6
GENERATION FORECAST: TODAY NEXT DAY NEXT DAY NEXT DAY NEXT DAY
700 700 700 700 100
0600 Conditions: Walters's unit 2 is generating and Units 1 & 3 retired. Marshall Unit 2 is generating and unit 1
out of service.
0720 Oil levels, relay targets, voltmeters & sync ok. Panalarm tested.
0735 Plant checked ok. ,
0800 Checked & rotated cooling water intake screen.
0815 Contacted Sprint of our problem with the Lake Ele & inflow information on phone.
0951 Sprint called to let me know that the Lake & water inflow information problem had been taken care of.
Checked ok.
1042 Dan Redmon off Marshall site, kinda under the weather he reported.
1118 Walters Unit 3 on line.
1310 Plant checked ok.
1653 Plant checked ok.
1800 Cond: Walters unit 1 off line. Units 2&3 on line. Marshall unit 2 on line. relieved by Randall Arrowood.
1820 Relay targets, charts, voltmeters, sync and panalarm ok.
1947 Checked plant.
2133 Walters unit 3 retired. -
2232 Alarm, Marshall sump oil detection, continuous.
2245 Notified Danny to go check sump at Marshall.
2255 Danny on site at Marshall.
MyD-C-IR-OpL.,F-d.r
F -
2400 Danny checked and shake the float and alarms reset ok, was also getting the sump level alarm. Don't know
what the problem is but this is causing several call -outs.
0450 Checked plant.
0510 Wrote work request #00159212 on Walters MW indication recorder.
0510 Wrote work request #00159214 on Marshall sump alarms.
0525 Advised dispatcher 700 mw's or more for today.
0600 Cond: Walters unit 2 generating and Units 1 & 3 retired. Marshall unit 2 on line. relieved by Nease
Leatherwood.
MyDm,CammRL OpLogFm dm
F
WALTERS/MARSHALL OPERATION SHIFT LOG
Day/Date: 0600 08/19/04 thru 0600 08/20/04
OPERATOR: 0600-1800 Nease Leatherwood
1800- 06 00 Randall Arrowood
Walters Plant:
1. WR#00136792 Tainter Gate Control at dam -when water elevation drops to around 2248.0 we start receiving
faulty alarms 1/28/04
2. WO#00554626 on unit 2 TIV. 04/27/04
3. WO#00535025 working seal on No. 3 TIV doesn't close sometime until weight in cabinet is moved. 6/2/04
COMMENTS:
Walters Plant:
WR#00137546 TIV oil should not turn off when #39 lever is moved from auto to manual. 3/15/04
WR#00137548 DC Exciter Panels on balcony need covers. 3/15/04
Caution tag on unit 3 regulator selector switch on balcony. (03/17/04)
Caution tag on unit 3 cutler hammer regulator control switch on bench board. (03/17/04)
Marshall Plant:
Marshall Unit 1 Off -line -Hydro Clearance # 23-2000. Speed Increaser & Generator Clearance # 04-2001 for re-
installing speed increaser. Expected to return to service 2❑d quarter 2005.
Fish Lock on Local 07/12/04
Caution tag #01 Sluice gate A Breaker Open. 03/03/04
Caution tag #02 Sluice gate B Breaker Open 03/03/04
Caution tag #03 Upper fish lock Breaker Open. 03/03/04
Caution tag #04 Lower fish lock Breaker Open 03/03/04
Marshall clearance #00009 on primary cooling water A pump (6/1/04)
LAKE LEVELS:
Full Pond
06:00
18:00
06:00
Walters
2258.6
2254.1
2253.2
2252.7
Marshall
1624.0
1622.4
1622.2
1622.2
GENERATION FORECAST: TODAY NEXT DAY NEXT DAY NEXT DAY NEXT DAY
700 700 700 100 700
0600 Cond: Walters's unit 2 generating and Units 1 & 3 retired. Marshall Unit 2 on line.
0700 Work Management meeting til 0815 hrs.
0820 Oil levels, relay targets, voltmeters & sync ok. Panalarm tested.
0845 Plant checked ok.
0900 Checked & rotated cooling water intake screen.
1030 Removed W/R #00137055 on Unit 2 B-fly valve house lights from Walter plant Comments.
1103 Walters unit 3 on line.
1320 Put deficiency tag #0558 on Unit 2 gate F, packing is leaking some.
1400 Wayne Freeman reported that Marshall lake elevation had been calibrated to read correctly. Removed
W/R #00155395 from Marshall log.
1515 Plant checked ok.
1800 Cond: Walters unit 1 off line. Units 2&3 on line. Marshall unit 2 on line. Relieved by Randall Arrowood.
1832 Relay targets, charts, voltmeters, sync and panalarm ok.
1900 Checked plant.
2342 Walters Unit 3 retired.
0442 Checked plant.
0530 Advised dispatcher 700 mw's today, projected release 1200 — 2000.
0600 Cond: Walters's unit 2 generating and Units 1 & 3 retired. Marshall Unit 2 on line. Relieved by Nease
Leather -wood.
MyD—C—IR—OgL Fam
Walters - 2004 USGS DO Monitoring Data
Y/M/Day/Time
DO
(mg/1)
20040817000000
EDT
7.6
2
@
A
20040817001500
EDT
7.6
2
@
A
20040817003000
EDT
7.6
2
@
A
20040817004500
EDT
7.6
2
@
A
20040817010000
EDT
7.6
2
@
A
20040817011500
EDT
7.6
2
@
A
20040817013000
EDT
7.5
2
@
A
20040817014500
EDT
7.5
2
@
A
20040817020000
EDT
7.6
2
@
A
20040817021500
EDT
7.6
2
@
A
20040817023000
EDT
7.6
2
@
A
20040817024500
EDT
7.6
2
@
A
20040817030000
EDT
7.4
2
@
A
20040817031500
EDT
7.0
2
@
A
20040817033000
EDT
6.8
2
@
A
20040817034500
EDT
6.7
2
@
A
20040817040000
EDT
6.8
2
@
A
20040817041500
EDT
6.7
2
@
A
20040817043000
EDT
6.7
2
@
A
20040817044500
EDT
7.1
2
@
A
20040817050000
EDT
7.1
2
@
A
20040817051500
EDT
7.2
2
@
A
20040817053000
EDT
7.0
2
@
A
20040817054500
EDT
7.2
2
@
A
20040817060000
EDT
7.2
2
@
A
20040817061500
EDT
7.1
2
@
A
20040817063000
EDT
7.6
2
@
A
20040817064500
EDT
8.0
2
@
A
20040817070000
EDT
7.8
2
@
A
20040817071500
EDT
7.6
2
@
A
20040817073000
EDT
7.6
2
@
A
20040817074500
EDT
7.5
2
@
A
20040817080000
EDT
7.6
2
@
A
20040817081500
EDT
7.7
2
@
A
20040817083000
EDT
7.7
2
@
A
20040817084500
EDT
7.3
2
@
A
20040817090000
EDT
7.0
2
@
A
20040817091500
EDT
6.8
2
@
A
20040817093000
EDT
7.4
2
@
A
20040817094500
EDT
7.7
2
@
A
20040817100000
EDT
7.9
2
@
A
20040817101500
EDT
8.0
2
@
A
20040818093000
EDT
6.0
2
@
A
20040818094500
EDT
6.2
2
@
A
20040818100000
EDT
6.3
2
@
A
20040818101500
EDT
6.3
2
@
A
20040818103000
EDT
6.1
2
@
A
20040818104500
EDT
6.2
2
@
A
20040818110000
EDT
6.1
2
@
A
20040818111500
EDT
6.0
2
@
A
20040818113000
EDT
6.6
2
@
A
20040818114500
EDT
8.6
2
@
A
20040818120000
EDT
7.8
2
@
A
20040818121500
EDT
7.8
2
@
A
20040818123000
EDT
7.9
2
@
A
20040818124500
EDT
7.9
2
@
A
20040818130000
EDT
7.8
2
@
A
20040818131500
EDT
7.6
2
@
A
20040818133000
EDT
7.5
2
@
A
20040818134500
EDT
7.5
2
@
A
20040818140000
EDT
7.4
2
@
A
20040818141500
EDT
7.5
2
@
A
20040818143000
EDT
7.5
2
@
A
20040818144500
EDT
7.5
2
@
A
20040818150000
EDT
7.4
2
@
A
20040818151500
EDT
7.4
2
@
A
20040818153000
EDT
7.4
2
@
A
20040818154500
EDT
7.4
2
@
A
20040818160000
EDT
7.4
2
@
A
20040818161500
EDT
7.3
2
@
A
20040818163000
EDT
7.3
2
@
A
20040818164500
EDT
7.3
2
@
A
20040818170000
EDT
7.2
2
@
A
20040818171500
EDT
7.2
2
@
A
20040818173000
EDT
7.2
2
@
A
20040818174500
EDT
7.2
2
@
A
20040818180000
EDT
7.2
2
@
A
20040818181500
EDT
7.1
2
@
A
20040818183000
EDT
7.1
2
@
A
20040818184500
EDT
7.1
2
@
A
20040818190000
EDT
7.0
2
@
A
20040818191500
EDT
7.0
2
@
A
20040818193000
EDT
7.1
2
@
A
20040818194500
EDT
7.1
2
@
A
20040818200000
EDT
7.1
2
@
A
20040818201500
EDT
7.0
2
@
A
20040818203000
EDT
7.0
2
@
A
20040818204500
EDT
7.0
2
@
A
Jan 2G 05 08:47a
_ _ U S_G S- _R S_N F__V T 1 _ 1-C
20040818210000
EDT
7.0
2
@
A
20040818211500
EDT
7.0
2
@
A
20040818213000
EDT
7.0
2
@
A
20040818214500
EDT
7.0
2
@
A
20040818220000
EDT
7.0
2
@
A
20040818221500
EDT
7.0
2
@
A
20040818223000
EDT
7.0
2
@
A
20040818224500
EDT
7.0
2
@
A
20040818230000
EDT
6.9
2
@
A
20040818231500
EDT
6.9
2
@
A
20040818233000
EDT
6.8
2
@
A
20040818234500
EDT
6.9
2
@
A
20040819600000
EDT
6.7
2
@
A
20040819001500
EDT
6.6
2
@
A
20040819003000
EDT
6.8
2
@
A
20040819004500
EDT
7.0
2
@
A
20040819010000
EDT
6.2
2
@
A
20040819011500
EDT
5.5
2
@
A
20040819013000
EDT
4.9
2
@
A
20040819014500
EDT
4.8
2
@
A
20040819020000
EDT
5.7
2
@
A
20040819021500
EDT
6.4
2
@
A
20040819023000
EDT
6.5
2
@
A
20040819024500
EDT
6.2
2
@
A
20040819030000
EDT
5.6
2
@
A
i 20040819031500
EDT
5.4
2
@
A
20040819033000
EDT
4.7
2
@
A
20040819034500
EDT
5.0
2
@
A
j 20040819040000
EDT
5.1
2
@
A
20040819041500
EDT
5.0
2
@
A
20040819043000
EDT
4.8
2
@
A
20040819044500
EDT
5.1
2
@
A
20040819050000
EDT
5.1
2
@
A
20040819051500
EDT
5.3
2
@
A
20040819053000
EDT
5.3
2
@
A
20040819054500
EDT
5.2
2
@
A
20040819060000
EDT
5.1
2
@
A
20040819061500
EDT
5.2
2
@
A
20040819063000
EDT
5.5
2
@
A
20040819064500
EDT
5.7
2
@
A
20040819070000
EDT
5.8
2
@
A
20040819071500
EDT
5.6
2
@
A
20040819073000
EDT
5.4
2
@
A
j 20040819074500
EDT
5.4
2
@
A
20040819080000
EDT
5.4
2
@
A
20040819081500
EDT
5.4
2
@
A
T'�
U.S. DEPARTMENT OF THE INTERIOR - U.S. GEOLOGICAL SURVEY - WATER RESOURCES
STATION NUMBER 03460795 PIGEON R BL POWER PLANT NR WATERVILLE, NC SOURCE AGENCY USGS STATE
37 COUNTY 087
LATITUDE 354702 LONGITUDE 0830644 NAD27 DRAINAGE AREA 538 CONTRIBUTING DRAINAGE AREA
DATUM 1360 NGVD29
Date Processed: 2005-01-24 14:47 By rgbarker
Discharge, IN cfs COMPUTED UNIT VALUES (INSTANTANEOUS)
TIME VALUE TIME VALUE TIME VALUE TIME VALUE TIME VALUE
PROVISIONAL DATA
00:00:00
265
@
05:00:00
00:15:00
265
@
05:15:00
00:30:00
265
@
05:30:00
00:45:00
265
@
05:45:00
01:00:00
265
@
06:00:00
01:15:00
262
@
06:15:00
01:30:00
265
@
06:30:00
01:45:00
262
@
06:45:00
02:00:00
262
@
07:00:00
02:15:00
265
@
07:15:00
02:30:00
262
@
07:30:00
02:45:00
262
@
07:45:00
03:00:00
262
@
08:00:00
03:15:00
262
@
08:15:00
03:30:00
262
@
08:30:00
03:45:00
262
@
08:45:00
04:00:00
262
@
09:00:00
04:15:00
262
@
09:15:00
04:30:00
262
@
09:30:00
04:45:00
262
@
09:45:00
PROVISIONAL DATA
00:00:00
251
@
05:00:00
00:15:00
251
@
05:15:00
00:30:00
251
@
05:30:00
00:45:00
251
@
05:45:00
01:00:00
251
@
06:00:00
01:15:00
251
@
06:15:00
01:30:00
248
@
06:30:00
01:45:00
248
@
06:45:00
02:00:00
248
@
07:00:00
02:15:00
248
@
07:15:00
02:30:00
248
@
07:30:00
02:45:00
248
@
07:45:00
03:00:00
248
@
08:00:00
03:15:00
248
@
08:15:00
03:30:00
248
@
08:30:00
03:45:00
248
@
08:45:00
04:00:00
248
@
09:00:00
04:15:00
248
@
09:15:00
04:30:00
248
@
09:30:00
04:45:00
248
@
09:45:00
AUGUST 15, 2004
262
@
10:00:00
262
262
@
10:15:00
262
262
@
10:30:00
258
262
@
10:45:00
258
262
@
11:00:00
262
262
@
11:15:00
262
262
@
11:30:00
262
258
@
11:45:00
262
262
@
12:00:00
262
258
@
12:15:00
258
262
@
12:30:00
258
258
@
12:45:00
258
258
@
13:00:00
258
258
@
13:15:00
262
258
@
13:30:00
262
258
@
13:45:00
262
258
@
14:00:00
258
262
@
14:15:00
258
262
@
14:30:00
258
262
@
14:45:00
262
AUGUST 16, 2004
248
@
10:00:00
248
248
@
10:15:00
245
248
@
10:30:00
241
248
@
10:45:00
241
248
@
11:00:00
241
248
@
11:15:00
241
248
@
11:30:00
238
248
@
11:45:00
238
248
@
12:00:00
238
248
@
12:15:00
235
248
@
12:30:00
231
248
@
12:45:00
231
245
@
13:00:00
373
248
@
13:15:00
816
248
@
13:30:00
848
248
@
13:45:00
855
251
@
14:00:00
861
269
@
14:15:00
861
255
@
14:30:00
861
248
@
14:45:00
861
Eastern Daylight Time
@
15:00:00
258
@
@
15:15:00
258
@
@
15:30:00
258
@
@
15:45:00
258
@
@
16:00:00
258
@
@
16:15:00
258
@
@
16:30:00
258
@
@
16:45:00
255
@
@
17:00:00
258
@
@
17:15:00
258
@
@
17:30:00
255
@
@
17:45:00
255
@
@
18:00:00
255
@
@
18:15:00
255
@
@
18:30:00
255
@
@
18:45:00
255
@
@
19:00:00
255
@
@
19:15:00
255
@
@
19:30:00
255
@
@
19:45:00
255
@
Eastern Daylight Time
@ 15:00:00
861
@
@ 15:15:00
868
@
@ 15:30:00
868
@
@ 15:45:00
868
@
@ 16:00:00
868
@
@ 16:15:00
868
@
@ 16:30:00
861
@
@ 16:45:00
1160
@
@ 17:00:00
1300
@
@ 17:15:00
1490
@
@ 17:30:00
1500
@
@ 17:45:00
1500
@
@ 18:00:00
1510
@
@ 18:15:00
1500
@
@ 18:30:00
1500
@
@ 18:45:00
1500
@
@ 19:00:00
1490
@
@ 19:15:00
1490
@
@ 19:30:00
1490
@
@ 19:45:00
1500
@
SUBJECT TO REVISION
20:00:00
255
@
20:15:00
251
@
20:30:00
255
@
20:45:00
251
@
21:00:00
251
@
21:15:00
251
@
21:30:00
251
@
21:45:00
251
@
22:00:00
251
@
22:15:00
251
@
22:30:00
251
@
22:45:00
251
@
23:00:00
251
@
23:15:00
251
@
23:30:00
251
@
23:45:00
251
@
SUBJECT TO REVISION
20:00:00
1490
@
20:15:00
1500
@
20:30:00
1510
@
20:45:00
1520
@
21:00:00
1900
@
21:15:00
2040
@
21:30:00
1610
@
21:45:00
1570
@
22:00:00
1560
@
22:15:00
1550
@
22:30:00
1560
@
22:45:00
1560
@
23:00:00
1490
@
23:15:00
1020
@
23:30:00
894
@
23:45:00
868
@
U.S. DEPARTMENT OF THE INTERIOR - U.S. GEOLOGICAL SURVEY - WATER RESOURCES
STATION NUMBER 03460795 PIGEON R BL POWER PLANT NR WATERVILLE, NC SOURCE AGENCY USGS STATE
37 COUNTY 087
LATITUDE 354702 LONGITUDE 0830644 NAD27 DRAINAGE AREA 538 CONTRIBUTING DRAINAGE AREA
DATUM 1360 NGVD29
Date Processed: 2005-01-24 14:47 By rgbarker
Discharge, IN cfs COMPUTED UNIT VALUES (INSTANTANEOUS)
TIME VALUE TIME VALUE TIME VALUE TIME VALUE TIME VALUE
PROVISIONAL DATA
00:00:00
861
@
05:00:00
00:15:00
861
@
05:15:00
00:30:00
868
@
05:30:00
00:45:00
874
@
05:45:00
01:00:00
874
@
06:00:00
01:15:00
881
@
06:15:00
01:30:00
887
@
06:30:00
01:45:00
881
@
06:45:00
02:00:00
874
@
07:00:00
02:15:00
881
@
07:15:00
02:30:00
868
@
07:30:00
02:45:00
848
@
07:45:00
03:00:00
530
@
08:00:00
03:15:00
326
@
08:15:00
03:30:00
273
@
08:30:00
03:45:00
262
@
08:45:00
04:00:00
258
@
09:00:00
04:15:00
258
@
09:15:00
04:30:00
258
@
09:30:00
04:45:00
276
@
09:45:00
PROVISIONAL DATA
00:00:00
258
@
05:00:00
00:15:00
258
@
05:15:00
00:30:00
258
@
05:30:00
00:45:00
258
@
05:45:00
01:00:00
258
@
06:00:00
01:15:00
258
@
06:15:00
01:30:00
258
@
06:30:00
01:45:00
258
@
06:45:00
02:00:00
258
@
07:00:00
02:15:00
258
@
07:15:00
02:30:00
258
@
07:30:00
02:45:00
258
@
07:45:00
03:00:00
258
@
08:00:00
03:15:00
258
@
08:15:00
03:30:00
258
@
08:30:00
03:45:00
258
@
08:45:00
04:00:00
258
@
09:00:00
04:15:00
258
@
09:15:00
04:30:00
258
@
09:30:00
04:45:00
255
@
09:45:00
AUGUST 17, 2004
287
@
10:00:00
368
291
@
10:15:00
405
291
@
10:30:00
409
295
@
10:45:00
368
295
@
11:00:00
355
295
@
11:15:00
351
377
@
11:30:00
360
661
@
11:45:00
861
778
@
12:00:00
1450
672
@
12:15:00
1450
591
@
12:30:00
1450
545
@
12:45:00
1490
535
@
13:00:00
1480
672
@
13:15:00
1450
565
@
13:30:00
1480
355
@
13:45:00
1450
291
@
14:00:00
1480
287
@
14:15:00
1450
347
@
14:30:00
1470
364
@
14:45:00
1460
AUGUST 18, 2004
255
@
10:00:00
258
258
@
10:15:00
258
255
@
10:30:00
258
255
@
10:45:00
258
255
@
11:00:00
258
255
@
11:15:00
258
258
@
11:30:00
330
258
@
11:45:00
1300
258
@
12:00:00
1450
258
@
12:15:00
1450
258
@
12:30:00
1440
258
@
12:45:00
1490
258
@
13:00:00
1480
258
@
13:15:00
1450
258
@
13:30:00
1440
258
@
13:45:00
1440
258
@
14:00:00
1450
258
@
14:15:00
1440
258
@
14:30:00
1440
258
@
14:45:00
1440
Eastern Daylight Time
@ 15:00:00
1470
@
@ 15:15:00
1460
@
@ 15:30:00
1490
@
@ 15:45:00
1450
@
@ 16:00:00
1450
@
@ 16:15:00
1440
@
@ 16:30:00
1450
@
@ 16:45:00
1440
@
@ 17:00:00
1440
@
@ 17:15:00
1440
@
@ 17:30:00
1440
@
@ 17:45:00
1430
@
@ 18:00:00
1430
@
@ 18:15:00
1420
@
@ 18:30:00
1430
@
@ 18:45:00
1420
@
@ 19:00:00
1430
@
@ 19:15:00
1420
@
@ 19:30:00
1240
@
@ 19:45:00
969
@
Eastern Daylight Time
@ 15:00:00
1440
@
@ 15:15:00
1440
@
@ 15:30:00
1430
@
@ 15:45:00
1430
@
@ 16:00:00
1430
@
@ 16:15:00
1430
@
@ 16:30:00
1450
@
@ 16:45:00
1450
@
@ 17:00:00
1450
@
@ 17:15:00
1450
@
@ 17:30:00
1450
@
@ 17:45:00
1450
@
@ 18:00:00
1450
@
@ 18:15:00
1450
@
@ 18:30:00
1450
@
@ 18:45:00
1450
@
@ 19:00:00
1450
@
@ 19:15:00
1450
@
@ 19:30:00
1450
@
@ 19:45:00
1450
@
SUBJECT TO REVISION
20:00:00
942
@
20:15:00
935
@
20:30:00
928
@
20:45:00
1230
@
21:00:00
1120
@
21:15:00
1100
@
21:30:00
921
@
21:45:00
742
@
22:00:00
525
@
22:15:00
458
@
22:30:00
443
@
22:45:00
368
@
23:00:00
287
@
23:15:00
265
@
23:30:00
258
@
23:45:00
258
@
SUBJECT TO REVISION
20:00:00
1450
@
20:15:00
1440
@
20:30:00
1450
@
20:45:00
1460
@
21:00:00
1460
@
21:15:00
1470
@
21:30:00
1450
@
21:45:00
1320
@
22:00:00
1310
@
22:15:00
1330
@
22:30:00
1330
@
22:45:00
1310
@
23:00:00
1230
@
23:15:00
908
@
23:30:00
785
@
23:45:00
736
@
U.S. DEPARTMENT OF THE INTERIOR - U.S. GEOLOGICAL SURVEY - WATER RESOURCES
STATION NUMBER 03460795 PIGEON R BL POWER PLANT NR WATERVILLE, NC SOURCE AGENCY USGS STATE
37 COUNTY 087
LATITUDE 354702 LONGITUDE 0830644 NAD27 DRAINAGE AREA 538 CONTRIBUTING DRAINAGE AREA
DATUM 1360 NGVD29
Date Processed: 2005-01-24 14:47 By rgbarker
Discharge, IN cfs COMPUTED UNIT VALUES (INSTANTANEOUS)
TIME VALUE TIME VALUE TIME VALUE TIME VALUE TIME VALUE
PROVISIONAL DATA
00:00:00
555
@
05:00:00
00:15:00
473
@
05:15:00
00:30:00
591
@
05:30:00
00:45:00
645
@
05:45:00
01:00:00
377
@
06:00:00
01:15:00
269
@
06:15:00
01:30:00
241
@
06:30:00
01:45:00
245
@
06:45:00
02:00:00
360
@
07:00:00
02:15:00
414
@
07:15:00
02:30:00
419
@
07:30:00
02:45:00
334
@
07:45:00
03:00:00
269
@
08:00:00
03:15:00
255
@
08:15:00
03:30:00
251
@
08:30:00
03:45:00
248
@
08:45:00
04:00:00
248
@
09:00:00
04:15:00
248
@
09:15:00
04:30:00
245
@
09:30:00
04:45:00
248
@
09:45:00
PROVISIONAL DATA
00:00:00
810
@
05:00:00
00:15:00
678
@
05:15:00
00:30:00
414
@
05:30:00
00:45:00
276
@
05:45:00
01:00:00
235
@
06:00:00
01:15:00
225
@
06:15:00
01:30:00
222
@
06:30:00
01:45:00
222
@
06:45:00
02:00:00
231
@
07:00:00
02:15:00
248
@
07:15:00
02:30:00
251
@
07:30:00
02:45:00
251
@
07:45:00
03:00:00
251
@
08:00:00
03:15:00
251
@
08:15:00
03:30:00
251
@
08:30:00
03:45:00
251
@
08:45:00
04:00:00
251
@
09:00:00
04:15:00
251
@
09:15:00
04:30:00
251
@
09:30:00
04:45:00
251
@
09:45:00
AUGUST 19, 2004
248
@
10:00:00
241
248
@
10:15:00
241
245
@
10:30:00
241
245
@
10:45:00
241
245
@
11:00:00
241
245
@
11:15:00
241
303
@
11:30:00
492
287
@
11:45:00
1270
258
@
12:00:00
1450
248
@
12:15:00
1420
245
@
12:30:00
1450
241
@
12:45:00
1460
241
@
13:00:00
1400
241
@
13:15:00
1410
241
@
13:30:00
1410
241
@
13:45:00
1410
241
@
14:00:00
1430
241
@
14:15:00
1430
241
@
14:30:00
1430
241
@
14:45:00
1430
AUGUST 20, 2004
251
@
10:00:00
251
248
@
10:15:00
251
251
@
10:30:00
251
248
@
10:45:00
251
248
@
11:00:00
251
248
@
11:15:00
251
248
@
11:30:00
251
248
@
11:45:00
273
248
@
12:00:00
405
248
@
12:15:00
483
248
@
12:30:00
1030
248
@
12:45:00
1330
248
@
13:00:00
1470
248
@
13:15:00
1490
248
@
13:30:00
1480
248
@
13:45:00
1490
248
@
14:00:00
1480
248
@
14:15:00
1480
248
@
14:30:00
1480
251
@
14:45:00
1450
Eastern Daylight Time
@ 15:00:00
1430
@
@ 15:15:00
1430
@
@ 15:30:00
1410
@
@ 15:45:00
1410
@
@ 16:00:00
1410
@
@ 16:15:00
1410
@
@ 16:30:00
1400
@
@ 16:45:00
1400
@
@ 17:00:00
1400
@
@ 17:15:00
1390
@
@ 17:30:00
1400
@
@ 17:45:00
1400
@
@ 18:00:00
1400
@
@ 18:15:00
1400
@
@ 18:30:00
1400
@
@ 18:45:00
1400
@
@ 19:00:00
1390
@
@ 19:15:00
1390
@
@ 19:30:00
1390
@
@ 19:45:00
1410
@
Eastern Daylight Time
@ 15:00:00
1450
@
@ 15:15:00
1450
@
@ 15:30:00
1450
@
@ 15:45:00
1450
@
@ 16:00:00
1460
@
@ 16:15:00
1400
@
@ 16:30:00
1380
@
@ 16:45:00
1390
@
@ 17:00:00
1400
@
@ 17:15:00
1410
@
@ 17:30:00
1460
@
@ 17:45:00
1490
@
@ 18:00:00
1480
@
@ 18:15:00
1470
@
@ 18:30:00
1490
@
@ 18:45:00
1490
@
@ 19:00:00
1480
@
@ 19:15:00
1490
@
@ 19:30:00
1480
@
@ 19:45:00
1480
@
SUBJECT TO REVISION
20:00:00
1240
@
20:15:00
1440
@
20:30:00
1360
@
20:45:00
1510
@
21:00:00
1520
@
21:15:00
1450
@
21:30:00
1450
@
21:45:00
1320
@
22:00:00
1290
@
22:15:00
1290
@
22:30:00
1310
@
22:45:00
1410
@
23:00:00
1410
@
23:15:00
1340
@
23:30:00
1140
@
23:45:00
984
@
SUBJECT TO REVISION
20:00:00
1480
@
20:15:00
1490
@
20:30:00
1490
@
20:45:00
1480
@
21:00:00
1490
@
21:15:00
1490
@
21:30:00
1480
@
21:45:00
1310
@
22:00:00
1170
@
22:15:00
984
@
22:30:00
525
@
22:45:00
306
@
23:00:00
241
@
23:15:00
225
@
23:30:00
219
@
23:45:00
219
@
e
U.S. DEPARTMENT OF THE INTERIOR - U.S. GEOLOGICAL SURVEY - WATER RESOURCES
STATION NUMBER 03460795 PIGEON R BL POWER PLANT NR WATERVILLE, NC SOURCE AGENCY USGS STATE
37 COUNTY 087
LATITUDE 354702 LONGITUDE 0830644 NAD27 DRAINAGE AREA 538 CONTRIBUTING DRAINAGE AREA
DATUM 1360 NGVD29
Date Processed: 2005-01-24 14:47 By rgbarker
Discharge,
IN cfs
COMPUTED UNIT VALUES
(INSTANTANEOUS)
TIME
VALUE
TIME
VALUE
TIME VALUE TIME
VALUE TIME
VALUE
PROVISIONAL DATA
AUGUST 21, 2004
Eastern Daylight Time
SUBJECT
TO REVISION
00:00:00
219
@
05:00:00
222
@
10:00:00
225
@
15:00:00
1980
@
20:00:00
661
@
00:15:00
219
@
05:15:00
222
@
10:15:00
428
@
15:15:00
1990
@
20:15:00
545
@
00:30:00
228
@
05:30:00
222
@
10:30:00
748
@
15:30:00
1990
@
20:30:00
419
@
00:45:00
225
@
05:45:00
225
@
10:45:00
1050
@
15:45:00
2100
@
20:45:00
382
@
01:00:00
219
@
06:00:00
225
@
11:00:00
1070
@
16:00:00
1910
@
21:00:00
373
@
01:15:00
219
@
06:15:00
225
@
11:15:00
914
@
16:15:00
1820
@
21:15:00
368
@
01:30:00
219
@
06:30:00
225
@
11:30:00
1080
@
16:30:00
1820
@
21:30:00
339
@
01:45:00
216
@
06:45:00
228
@
11:45:00
1420
@
16:45:00
1830
@
21:45:00
299
@
02:00:00
216
@
07:00:00
228
@
12:00:00
1450
@
17:00:00
1840
@
22:00:00
287
@
02:15:00
216
@
07:15:00
225
@
12:15:00
1450
@
17:15:00
1620
@
22:15:00
287
@
02:30:00
216
@
07:30:00
225
@
12:30:00
1450
@
17:30:00
1590
@
22:30:00
287
@
02:45:00
216
@
07:45:00
225
@
12:45:00
1490
@
17:45:00
1600
@
22:45:00
287
@
03:00:00
216
@
08:00:00
225
@
13:00:00
1580
@
18:00:00
1560
@
23:00:00
287
@
03:15:00
216
@
08:15:00
225
@
13:15:00
1750
@
18:15:00
1480
@
23:15:00
284
@
03:30:00
216
@
08:30:00
225
@
13:30:00
1970
@
18:30:00
1420
@
23:30:00
284
@
03:45:00
219
@
08:45:00
225
@
13:45:00
1990
@
18:45:00
1170
@
23:45:00
280
@
04:00:00
219
@
09:00:00
225
@
14:00:00
1990
@
19:00:00
984
@
04:15:00
219
@
09:15:00
225
@
14:15:00
1980
@
19:15:00
835
@
04:30:00
219
@
09:30:00
225
@
14:30:00
1990
@
19:30:00
785
@
04:45:00
222
@
09:45:00
225
@
14:45:00
2000
@
19:45:00
724
@
NOTE: SYMBOLS USED ABOVE HAVE THE FOLLOWING MEANINGS --
@ = COMPUTED FROM VALUE(S) REVIEWED BY USGS PERSONNEL
4,.
I U.S. DEPARTMENT O, F THE INTERIOR - U.S. txt
RESOURCES GEOLOGICAL SURVEY- WATER
STATION NUMBER 03460795 PIGEON R BL POWER PLANT NR WATERVILLE, NC
SOURCE AGENCY
ULATITUDEAT354702COUNTY L0 GIT08DE 0830644 NAD
DRAINAGE AREA DATUM 1360 NGVD29 27 DRAINAGE AREA 538 CONTRIBUTING
Date Processed: 2005-01-17 13:16 By jrobbins
APPROVED
DD #13
Dissolved oxygen, water, unfiltered, milligrams per liter
JUNE 2004 TO SEPTEMBER 2004
DAY MAX
MIN MEAN
MAX MIN MEAN MAX MIN MEAN MAX
MIN MEAN
SEPTEMBER DUNE JULY AUGUST
1 8.43 6788 7.6
9.4 8.0 8.7 7.3
2 8.8 6.9 7.4 6.9 7.1
8.7
8.9 7.3 7.8 9.5 7.2 8.3
---
7.6 6.8 7.3 --- ---
--
8.2 7.1 7.7 --- --- --- 8.7
5 8.3 7.1 7.7 - 7.5 8.0
9.0 7.4 8.4 --- --- --- 8.3 7.2 7.7
6 8.3 7.6 7.9
8.6 7.4 8.0 --- --- --- 8.7
7 8.2 7.0 7.6 7.8 8.2
9.5 7.4 7.9 --- --- 9.2 7.3 8.2
8 8.0 7.2 7.5 ---
11.6 9.5 11.0 9.8 7.5 8.5 9.1 7.9 8.5
9 8.3 7.0 7.5
11.2 10.9 11.0 8.8 7.8 8.3 9.0 10 8.3 6.8 7.4 7.6 8.2
11.1 10.7 10.9 9.6 7.7 8.5
8.8 7.5 8.1
11 8.1 7.0 7.3
11.3 16.6 10.8 9.4 8.3 8.8
12 8.8 7.5 7.9
11.0 10.7 10.8 --- 8.5 7.0 7.8
13 8.5 7.6 7.9
11.3 10.8 11.0 --- 8.7 6.5 7.5
14 8.8 7.6 8.1
11.1 10.9 11.0 --- 8.6 6.4 7.2
15 --- 9.0 7.6 8.2
11.2 10.9 11.0 ---
8.3 6.2 7.2 8.8
7.8 8.3
16 ---
10.9 9.9 10.6 --- 8.2 6.1 7.3 9.0
17 _-- 7.4 8.1
12.4 10.2 12.0 --- 7.8 6.0 6.9
18 _- 8.3 4.9 7.3
12.1 9.6 11.6 ---
8.6 6.3 7.5 8.6
19 --- __ 5.4 6.6
--- 7.9 1 68 .
Page 1 8.2 4.7 6.6
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CP&L
Carolina Power & Light Corn
PO Box 1551
.411 Fayetteville Street Mall
Raleigh NC 27602
Ms. Lois D. Cashell, Secretary
Federal Energy Regulatory Commission
Mail Code: DPCA, HL 21.3
888 First Street, N.E.
Washington, D.C. 20426
Subject: Walters Hydroelectric Project
License Article No. 409
Dear Ms. Cashell:
April 2, 1998
As required by Article 409 of the operating license for the Carolina Power & Light's Walters
Hydroelectric Project, please find enclosed an original and eight copies of the report, "Dioxin and
Furan Concentrations in the Axial Muscle of Fish from Walters Lake, November 1997". This
report is required to be submitted to the FERC, the North Carolina Division of Water Quality,
and the North Carolina Division of Epidemiology by April 15`h of each year. Additionally,
Article 409 requires CP&L to submit to the FERC the dioxin monitoring report prepared each
year by Champion International Corporation with respect to the project reservoir. An original
and eight copies of that report, "Results of 1997 Dioxin Monitoring in Fish Tissue", dated
December 1997, are enclosed.
Results of CP&L's dioxin monitoring have shown substantial declines in dioxin concentrations
in major edible fish species from the reservoir since 1988. Recent CP&L monitoring data
indicated that catfish species have remained below the 3 pg/g (wet -weight basis) threshold
concentration used by the NCDE for implementing a limited fish consumption advisory. These
data suggested these species could be rescinded from the current fish consumption advisory for
the Pigeon River, including Walters Lake, given the NCDE criterion for removing such
advisories. Furthermore, 1997 marked the first year that the mean dioxin concentration in
common carp, also listed on the current consumption advisory, was below the 3 pg/g threshold.
Monitoring by CP&L from 1987 to 1997 has also shown that the fish community has shifted
from pollution -tolerant species such as common carp, bullhead species, and white catfish, to a
more balanced community comprised of sport fishes - black crappie, largemouth bass, bluegill,
channel catfish, and white crappie. In fact, common carp was a minor component of the fish
community in 1997 and would not be as sought after as the more abundant sport fish.
These declines in dioxin concentrations, coupled with the favorable changes in the fish
community, indicated the water quality has improved in Walters Lake since the late 1980s and
that natural sedimentation capping has been effective in reducing dioxin concentrations in fish
Ms. Lois D. Cashell 2 April 2, 1998
within the reservoir. Therefore, CP&L believes the favorable improvements observed in the fish
community within Walters Lake have demonstrated that natural encapsulation is an effective
long-term remedy to any dioxins that may be found in the reservoir's sediments.
If you have any questions, please contact Mr. Phil Lucas at (919) 546-7585.
art. Jo g M agd'r
d ; e
Hyd o perat'ons Plant Support
LLY/juc
Enclosures
c: Dr. R. H. Levine (NCDE)
Mr. A. D. McKinney (TWRA)
Ms. P. F. MacPherson (NCDWQ)
Mr. A. P. Howard (NCDWQ)✓
Mr. C. C. Wheeler (CP&L)
&L
Carolina Power & Light Company
PO Box 1551
411 Fayetteville Street Mall
Raleigh NC 27602
Ms. Lois D. Cashell, Secretary
Federal Energy Regulatory Commission
Mail Code: DPCA, HL 21.3
888 1st Street, N.E.
Washington, DC 20426
Subject: Walters Hydroelectric Project No. 432
Article 403 - Annual Report on 1996 Lake Level Elevation
Dear Ms. Cashell:
199
POW
T
• �. �. _4 h
i
The purpose of this letter is to file the lake level elevations report for the previous year IWV4,2",K
required by Article 403 of our license. Attached are an original and eight copies of a graph �`rC
depicting the hourly lake elevations for the calendar year 1996 at the Walters Hydroelectric
Project No. 432. As required by Article 403, we are also providing copies of this filing to the
North Carolina Department of Environment, Health and Natural Resources (NCDEHNR) and
Tennessee Wildlife Resources Agency (TWRA).
CP&L informed the FERC by letter dated March 8, 1996, that we had inadvertently exceeded the
minimum lake elevations for a brief period. The FERC acknowledged and responded to this
incident by letter dated March 26, 1996. CP&L took the appropriate steps as indicated in our
March 8, 1996, letter to minimize the possibility of a reoccurrence of this type of event.
If you have any questions regarding this matter, please call Mr. Phil Lucas at (919) 546-7585.
Sincerely,
CnC:e'
rgr
Manager - Hydro Operations & Plant Support
PJUtdp
Attachments
c: Mr. A. D. McKinney, TWRA (w/attachment)
Mr. S. W. Tedder, NCDEHNR (w/attachment)
m
Walters Plant Hourly Elevations
(January 1- March 31,1996)
Reservoir Level
January February March
Reservoir Level
Walters Plant Hourly Elevations
(April 1 - June 30,1996)
May
June
Walters Plant Hourly Elevations
Reservoir Level (October 1- December 31,1996)
-----------------
�6
li
51
=10 `.am
_,.
----------------------------------
-
.,'F Ip�IUUUtl'
_.
i
Rommel i .. -
.R
. ..
Minimum Elevation
October November December
State of North C...,.,,ina
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
Asheville Regional Office June 17, 19 9 6
Mr. David McKinney, Chief
Tennessee Wildlife Resources Agency
Ellington Agricultural Center
Post Office Box 40747
Nashville, Tennessee 37204
Dear Mr. McKinney:
DEHNR
Subject: Sediment Sampling of
Waterville Reservoir
Haywood County
I have your June 14, 1996 letter with attachment, in which you
discuss the proposed sediment sampling of Waterville Reservoir in
North Carolina by the Tennessee Wildlife Resources Agency. The
purpose of this sampling, as stated in your letter, would be to
determine if the Pigeon River has improved sufficiently to allow the
reintroduction of the fresh water mussel.
If you would like to approach this as a cooperative undertaking
between the North Carolina Division of Environmental Management and
the Tennessee Wildlife Resources Agency, I would suggest you delay
your planned June 23.1996, sampling run to allow certain details to
be first worked out. Obviously we would be interested in receiving
any analytical results you obtain from this effort.
Please give Mr. Keith Haynes or me a call at 704/251-6208.
Sincerely,
Roy M. Davis
Regional Supervisor
xc: Steve Tedder
Keith Haynes
Ken Eagleson
Jay Sauber
Derrick Brown
Phil Lucus
Interchange Building, 59 Woodfin Place, Asheville, N.C. 28801 Telephone 704-251-6208 FAX 704-251-6452
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper
State of Nortn t;arolina
Department of Environment,
Health and Natural Resources
Division of Water Quality
JamesB. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
Mr. Larry L. Yarger
Carolina Power & Light Company
PO Box 1551
411 Fayetteville Street Mall
Raleigh NC 17602
Dear Mr. Yarger:
Adft
E:)EHNF'to
Thank you for your prompt attention to the request by Bryn Tracy of my staff for a copy of
the Walters Hydroelectric Plant 1995 Water Quality Monitoring Report. This report will be
used by many parties as the water quality in the Pigeon River continues to be assessed and
reviewed by North Carolina, as well as Tennessee, Champion International Corporation,
CP&L, WRC, EPA and other interested groups. It is because of the great interest in this
river that we feel that all documents generated by any agency or company should be as
accurate as possible. With this intent, we would like to offer the following comments that
we feel should be addressed by CP&L, and revisions submitted to FERC and to the DWQ
Asheville Regional Office.
Appendix 2--chemistry samples were collected only from the surface of Walters
Lake not the surface and the bottom.
2. Appendix 2--transmission of light was measured at all stations, not just the lake
station.
3. Appendix 5--Water Flows from Walters Lake --the abscissa of the second graph is
labeled: "Daily means flow (ft3/sec)" and the units are in millions. The daily mean
flow can not possibly be in the millions of cfs because the inflows (Appendix 4) are
in the hundreds and thousands of cfs. It appears the abscissa should read: "Total
Daily Mean Flow".
4. Appendices 6 and 7--data are given for depths greater than 36 meters. However, no
data were collected from depths greater than 36 or 37 meters. These two graphs are
in error.
5. No raw data were provided for temperature, dissolved oxygen, specific
conductance, pH, Secchi disk transparency , or for any of the chemistry variables.
Listing of raw data, at least in tabular form, is important for analyzing seasonal and
water column trends.
6. Appendix 9--the fourth footnote should be deleted. Planktonic chlorophyll a data
were analyzed at all lake and river stations. Periphyton samples were analyzed only
during 1987-1988.
Environmental Sciences Branch 4401 Reedy Creek Road Raleigh, North Carolina 27607
Telephone 919-733-9960 FAX # 733-9959
An Equal opportunity Affirmative Action Employer 50% recycled/10% post consumer paper
7. Appendix 10--the footnote should be deleted. That footnote only applied to samples
that were collected in 1987 below the powerhouse at Station PR5 (Browns Bridge)
not at Station PR3 which was located above the powerhouse and not influenced by
powerhouse operations.
8. Page 4 (Algal Biomass --first and second bullets) and Appendix 10--the data
�,,,. .
interpretation cornpedYclilit`o,pphyll a data with chemical oxygen demanddata. e
COD data-during?thep'11iod 1�9$1�1988 for Stations PR1, B2, and PR3 were 75, 50,
and 11 mg/L, respectively. No epough chlorophyll a data were collected in 1987-
1988 to conthen take monthly data that were collected in 1995.
;
9. The;report did not mention the anecdotal algal blooms that are commonly observed at
Waters Lake during the summer by the dam personnel but are not monitored.
10. The total phosphorus detection level in 1995 was not 0.05 mg/liter. The samples
were analyzed by the Limnology Laboratory at the University of Missouri where the
detection levels are at least 0.01 mg/liter.
11. Page 5 (Organic Matter --first bullet) --the last sentence should read: "... 1987-1988
Thank you again for your prompt response to our request, and we look forward to
receiving appropriate revisions. If you have any questions about these comments please
contact Bryn Tracy or Trish MacPherson at (919)-733-6946.
Sincerely,
J verton
Acting Assistant Chief,
Water Quality Section
cc: Zarrest Westall;.ARO.
Trish MacPherson
Bryn Tracy
,L
.40
Article 409. (a) In order to monitor the concentrations
of dioxin (2,3,7,8-tetrachlorodibenzo-para-dioxin("2,3,7,8-TCDD"))
and furans(2,3,7,8-tetrachlorod,ibenzofuran (2,3,7,8-TCDF")) in
edible fillets from predatory and bottom -feeding fishes in the
Project reservoir, the Licensee each year shall collect fish from
the'Project reservoir and analyze fillets from such fish for
concentrations of 2,3,7,8-TCDD and 2,3,7,8-TCDF. The fish
collection and analysis shall be done in accordance with the
Licensee's January 27, 1992 "Revised protocol for determining the
concentrations of 2,3,7,8-TCDD and TCDF in fish tissues from the
Walters Hydroelectric Project," as subsequently modified. The
Licensee may modify the protocol to conform with the -.provisions of
any guidance document on how 'to sample and analyze fish for
concentrations of 2,3,7,8-TCDD or 2,3,7,8-TCDF issued by the Risk
Assessment and Management Branch of the United States
Environmental Protection Agency if such modifications are agreed to
in writing by the North Carolina Department of Environment, Health
and Natural Resources (NCDEHNR) Division of Environmental
Management (NCDEM) and Division of Epidemiology (NODE).
(b) No later than April 15 each year, the Licensee shall
submit a written report of the results of the 2,3,7,8-TCDD and
2,3,7,8-TCDF analysis of the fish collected the previous year to
the Commission, NCDEM, and NODE. Such reports shall be presented
in a format generally comparable to that used in the March 1992
report of the Licensee entitled "Concentrations of Dioxin (2,3,7,8-
r� - 2 4
C O,J
TCDD) and Furan (2,3,7,8-TCDF) in Fish Tissues from. the Walters
Hydroelectric Project."
(c) The Licensee shall continue to comply with the
provisions of this article until otherwise ordered by the
Commission or until the State of North Carolina rescinds its 1988
fish consumption advisory for the Project reservoir, whichever
occurs first. The Licensee shall, when received, file with the
Commission the dioxin monitoring reports now being prepared -each
year by Champion International with respect to the Project
reservoir. In the event Champion. International does not, in any
year and for whatever reason, conduct the reservoir dioxin sampling
during the period in which it is currently conducting such
sampling, the Licensee shall so notify the Commission within 15
days of the end of the sampling period and shall conduct such.
sampling.
(d) [A::tt:J7lth•e d of the fourth calendar year at the
date "hat his license __is issued, the�Licensee shall s,ui
.report fb the Commission regard n_g__the issuQ of dioxin in the
Project"'re vor. Such report shall contain the Licensees
recommendations to the Conm ss o,n-".on wha-t-fur� er.�actions, ;if, an. ,
shou�crbertaken.to addres:s_d ox n- contamination --of the-sed-iments in
the Project reservoir. Copies of the report and recommendations
shall be provided to NCDEHNR and to the Tennessee Wildlife
Resources Agency, or their successor agencies. The Commission,
- 25 -
30
25
20
0
U 15
I--
00
ti
N 10
5
E
Dioxin Concentrations in Fish Tissue from Walters Lake
1991 1992 1993 1994 1995
Sample year (November/December)
Common carp Channel catfish Largemouth bass Bluegill Bullhead Black crappie
30
25
20
15
10
5
Article 409. (a) In order to monitor the concentrations
of dioxin (2,3,7,8-tetrachlorodibenzo-para-dioxin("2,3,7,8-TCDD"))
and furans(2,3,7,8-tetrachlorodibenzofuran (2,3,718-TCDF11)) in
edible fillets from predatory and bottom -feeding fishes in the
Project reservoir, the Licensee each year shall collect fish from
the" Project reservoir and analyze fillets from such fish for
concentrations of 2,3,7,8-TCDD and 2,3,7,8-TCDF. The fish
collection and analysis shall be done in accordance with the
Licensee's January'27, 1992 "Revised protocol for determining the
concentrations of 2,3,7,8-TCDD and TCDF in fish tissues from the
Walters Hydroelectric Project," as subsequently modified. The
Licensee maymodify the protocol -to conform with the -.provisions of
any guidance document on how 'to sample and analyze fish for
concentrations of 2,3,7,8-TCDD or 2,3,7,8-TCDF issued by the Risk
Assessment and Management Branch of the United States
Environmental Protection Agency if such modifications are agreed to
in writing by the North Carolina Department of Environment, Health
and Natural Resources (NCDEHNR) Division of a Environmental
Management (NCDEM) and Division of Epidemiology (NODE).
(b) No later than April 15 each year, the Licensee shall
submit a written report of the results of the 2,3,7,8-TCDD and
2,3,7,8-TCDF analysis of the fish collected the previous year to
the Commission, NCDEM, and NCDE. Such reports shall be presented
in a format generally comparable to that used in the March 1992
report of the Licensee entitled "Concentrations of Dioxin (2,3,7,8-
- 24 -
I
TCDD) and Furan (2,3,7,8-TCDF) in Fish Tissues from the Walters
Hydroelectric Project."
(c) The Licensee shall continue to comply with the
provisions of this article until otherwise ordered by the
Commission or until the State of North Carolina rescinds its 1988
fish consumption advisory for the Project reservoir, whichever
occurs first. The Licensee shall, when received, file with the
Commission the dioxin monitoring reports now being prepared. each
year by Champion International- with respect to the Project
reservoir. In the event Champion International does not., in any
year and for whatever reason, conduct the reservoir dioxin sampling
during the period in which it is currently conducting such
sampling, the Licensee shall so notify the Commission within 15
days of the end of the sampling period and shall_ conduct such.
sampling.
(d)- At the end of the fourth calendar year after the
date that this license is issued, the Licensee shall submit a
report to the Commission regarding the issue of dioxin in the
Project reservoir. Such report shall contain the Licensee's
recommendations to the Commission on what further actions, if any,
should be taken to address dioxin contamination of the sediments in
the Project -reservoir. Copies of the report and recommendations
shall be provided to NCDEHNR and to the Tennessee Wildlife
Resources Agency, or their successor agencies. The Commission,
- 25 -
Article 409. (a) In order to monitor the concentrations
of dioxin (2,3,7,8-tetrachlorodibenzo-para-dioxin("2,3,7,8-TCDD"))
and furans(2,3,7,8-tetrachlorodibenzofuran (2,3,7,8-TCDF")) in
edible fillets from ,predatory and bottom -feeding fishes in the
Project reservoir, the Licensee each year shall collect fish from
the" Project reservoir and analyze fillets from such fish for
concentrations of 2,3,7,8-TCDD and 2,3,7,8-TCDF. The fish
collection and analysis shall be done 'in accordance with the
Licensee's January-27, 1992 "Revised protocol for determining the
concentrations of 2,3,7,8-TCDD and TCDF in fish tissues from the
Walters Hydroelectric Project," as subsequently modified. The
Licensee may modify the protocol -to conform with the -.provisions of
any guidance document on how 'to sample -and analyze fish for
concentrations of 2,3,7,8-TCDD or 2,3,7,8-TCDF issued by the Risk
Assessment and Management Branch of the United States
Environmental Protection Agency if such modifications are agreed to
in writing by the North Carolina Department of Environment, Health
and Natural Resources (NCDEHNR) Division of Environmental
Management (NCDEM) and Division of Epidemiology (NODE).
(b) No later than April 15 each year, the Licensee shall
submit a written report of the results of the 2,3,7,8-TCDD and
2,3,7,8-TCDF analysis of the fish collected the previous year to
the Commission, NCDEM, and NCDE. Such reports shall be presented
in a format generally comparable to that used in the March 1992
report of the Licensee entitled.," -,Concentrations of Dioxin (2,3,7,8-
- 24 -
Article 409. (a) In order to monitor the concentrations
of dioxin (2,3,7,8;tetrachlorodibenzo-para-dioxin("2,3,7,8-TCDD"))
and furans(2,3,7,8-tetrachlorodibenzofuran (2,3,7,8-TCDF11)) in
edible fillets from predatory and bottom -feeding fishes in the
Project reservoir, the Licensee each year shall collect fish from
the"' Project reservoir and analyze fillets from such fish for
concentrations of 2,3,7,8-TCDD and 2,3,7,8-TCDF. The fish
collection and analysis shall be done in accordance with the
Licensees January'27, 1992 "Revised protocol for determining the
concentrations of 2,3,7,8-TCDD and TCDF in fish tissues from the
Walters Hydroelectric Project," as subsequently modified. The
Licensee may modify the protocol.to conform with the -.provisions of
any guidance document on how 'to sample and analyze fish for
concentrations of 2,3,7,8-TCDD or 2,3,7,8-TCDF issued by the Risk
Assessment and Management Branch of the United States
Environmental Protection Agency if such modifications are agreed to
in writing by the North Carolina Department of Environment, Health
and Natural Resources (NCDEHNR) Division of Environmental
Management (NCDEM) and Division of Epidemiology (NODE).
(b) No later than April 15 each year, the Licensee shall
submit a written report of the results of the 2,3,7,8-TCDD and
2,3,7,8-TCDF analysis of the fish collected the previous year to
the Commission, NCDEM, and NCDE. Such reports shall be,presented
in a format generally comparable to that used in the March 1992
report of the Licensee entitl'eci Concentrations of Dioxin (2,317,8-
- 24 -
N'
Project No. 432-004, et .41. -6- 682492
Health and Natural Resources, issued water quality certification
to Carolina Power for the Walters Hydroelectric Project. 2-1/
North Carolina and Tennessee have issued consumption
advisories for dioxin contaminated fish for Waterville Lake and
the Pigeon•River below the powerhouse, respectively. The source
of the dioxin contamination is a paper mill located on the Pigeon
River upstream of the Walters Hydroelectric Project. Although.
the paper mi11 has -.reduced dioxin -in its discharge by 95 percent,
dioxin is present in measurable concentrations throughout the
reservoir. The dioxin contamination poses two areas of concern
in the operation of the Walters Hydroelectric Project:'
(1) isolating dioxin -contaminated sediments from aquatic biota
and (2) monitoring dioxin levels in fish living in Waterville
Lake and the Pigeon River.
The EA examined dredging, artificial capping, and natural
capping as methods of isolating sediment dioxin. The�EA�f-ound-►
Chat dr�dging�is_not�a—feas;ble solu_t__os. The volume of
contaminated sediment is too great to remove, dewater, and
dispose of, and removing the more erodible surface layer would
only expose layers of sediment which have higher levels of
dioxin. 14/ tNatuza-1—capping ; proposed —by -Carolina Power ,,
Lp_r__omei smt The , Dfound that t
�b-ecause�t-he�sezii-me_zz_ts would=be—subj_e.c.t�t_o_the—s- cou-r—ac-tio --o
floods. Artificial capping would entail placing "clean" .material
over the contaminated sediment. The s-tof=f—r-ecomme-nded=i.n=the-_EA_
that er_r-ea.ches _01F1
wane-r-v I l e----Lake=s�houl d=be—required=z f=dioxin—come end ra t--= or-rsa=dog
rn.at--f-a-1l-=to --a_c-cept=abl-e .1=evels=(=tee: ;—sta-te—consumpt-ion-adv so�s,
chave:_=n:ot been remove_d-) within— -b.r_ e-f=time. The 1991 estimate of
the cost of the artificial capping was $15 million.
In the settlement agreement, the parties have adopted
the recommendation made by the staff in the EA, with
modifications. The settlement agreement provides that Carolina
_3/ in response to an April 27, 1990-letter from -Carolina Power,
the Department of Environment, Health, and Natural
Resources' Division of Environmental Management, in a letter
dated June 1, 1990, submitted comments on a proposal to
release a minimum flow from waterville.Lake into the
bypassed reach.
14/ EA at p. 36.
Project No. 432-004, et al. -7-
(;S2493
Power will monitor concentrations of dioxin and furans in edible
fillets from predatory and bottom -feeding fishes in the project
reservoir. The monitoring will continue until otherwise ordered
by the Commission or'until North Carolina rescinds its fish
consumption advisory for the project reservoir, whichever occurs
first. 15/ Carolina Power will also file with the Commission
the dioxin monitoring reports on the project reservoir now being
prepared each year by Champion'International. If, in any year,
Champion International does not conduct reservoir -dioxin
sampling, Carolina Power will conduct the sampling.
The settlement agreement also provides that, Cam tine -ei 3 oz f
t-he fouxth=c-alendaz- year!aft=er=the-issuance=of-the-new=:11aens.e=�
f.or=t-he-Wa _t_ers-.Hydr_oe1e-c_tr c-Project,- Caro.l.-ina==Power--wit=l=f:ile=ate
••r-epor:t-wi-eh=the=_Commi.s:s_i-on=ze.c.ommenda:ng=-what�f-ur -he-r_�ac-t- on- ^i-f-
any_,�should--be�taken__to address_dioxin__con_tamnation-of-=se-d=invents -�
in --the-prof=ect—r-ese�rvo r. The agar-aement-p oovidesJthat, -of--te-r
,not: ce, and--opp:ortuni-ty--,f-orhearing=and= =af-ter -c-onsul-t-at-ion w-i-th
the-s-tate--and-federal: agencies , _ �a-nd-u-pon _-a f-indi-ng_-tha-t—ssuc,h,
act_ arff s-necessary -and-_in the -public Ln-ter-es-t-, --the-Commission.-
mav7r_eaure�-Car-ol:na-:Power�t_o_�take_app.roprrate-act.i.on Ito =address �. ,
We conclude that monitoring fish tissue levels of dioxin
would be useful in confirming the apparent trend of declining
dioxin levels in fish from Waterville Lake and the Pigeon River.
Monitoring data would be useful to state agencies for determining
if and when state health advisories could be lifted.
Eurthermore;�-re_sending�he= th�advs_ories�(-if-warranted.) may:_>
obviate-t-he---need---f-or-more-e_-xpen-s ive--r-emed-i-a-tin-f-f o, _ eorts- such--as-
~artif:c=ial encapsulation --of =1-ake s=ediments;
moJ ni tro_r_ ng�ind sates-t-ha-tt -f=iah- t_is:sue=-_-Levels-hav_e-n:o_t.=dropped=,,
ibelow�st=a_te-advso,y�lmits,= _orb are-not-dec_iinng ,at,-a_suf:f:c_ent!_�
rate,---t1 e-Se-tt1-ement-agreement_ requires::=Casol.ina _P_ower
-reevaluate she=doxin�ssu_e-at_-the-end=of_--four-years.:.-% At that
time, the Commission could require Carolina Power to take a more
active approach such as some form -of encapsulation. Therefore,
we are incorporating the provisions of the settlement agreement,
stated above, into Article 409 of the new license for the Walters
Hydroelectric Project.
In areas of Waterville Lake, dioxin -contaminated sediments
lie close to the lake's surface. Lowering of the water surface
elevation would expose contaminated sediments to the effects of
scour and increase the likelihood of these sediments being
resuspended into the water column. Therefore, as part of the
15/ On September 14, 1994, North Carolina revised the fish
consumption advisory for the Pigeon River below the Champion
Mill to prohibit consumption of catfish and carp only.
to 1 (left). Ui
< showing lirr
'head space;.
ed net frame,
t.
;o 2 (below)-
ck showing ii
of net fi
ig net del
t. •- •
Environmental Issues in Relicensing Hearings for
Carolina Power & Light Company's Walters
Hydroelectric Plant on the Pigeon River, NC
John P. Lawler' and Bryn H. Tracy'
Abstract
This paper summarizes modeling of the fate and transport of dioxin
in the water column and sediments of a large hydrostation reservoir in
connection with contested hearings before the Federal Energy Regulatory
Commission (FERC) in 1991. Coupled differential equations of dioxin mass
transport in the lake and in its underlying active sediment layer were solved
analytically to estimate the period of time necessary for previously
discharged dioxin to be sufficiently deeply buried in the lake's sediments to
remove it from uptake by bottom -dwelling organisms and meet state water
quality standards.
Introduction
Carolina Power & Light Company's (CP&L) Walters Lake
hydroelectric facility on North Carolina's Pigeon River was the subject of
competing relicensing applications before FERC in 1991. CP&L held the
initial license on this three -unit 105 MWe facility since 1925, with annual
licenses issued by FERC since 1975. North Carolina Electric Membership
Corporation (NCEMC) submitted a competing application in the 1970s for
the permanent license, claiming an intent to provide "better environmental
stewardship" than it alleged CP&L to have provided to date. Central to
NCEMC's claim was the existence of dioxin in the sediments of Walters
Lake, an on -river impoundment that served as the facility's storage
reservoir, and NCEMC's plan to dredge the 15 million m3 (20 x 106 yd3) of
'Partner, Lawler, Matusky & Skelly Engineers, One Blue Hill Plaza, Pearl
River, NY 10965
-- 'Senior Scientist, Carolina Power & Light Company, 412 South
Wilmington Street, Raleigh, NC 27601
301
302 _ WATERPOWER '95
contaminated sediment to improve the river's water quality. The so
the dioxin was past discharges from a bleached Kraft
s ' schematic of the model ar
pulp and
some 32 km (20 miles) upstream. paPe�;
Figure 1. The analytical
equations in Figure 1 is g
CP&L's counter to NCEMC's proposal was the impractical .r
negative environmental
yf
.,_ These anal sc
�
trade-offs of the dredging proposal a d."
expectation that, since the mill had been recently upgraded to `analytical
•�=�
solution approach usese d t
techn,
eli
dioxin from its discharge, the older, dioxin -laden Walters Lake sedim `
solution
solution softwa
would be buried by new, clean sediment and removed from the food
numerical
numerical
solution, if it can be devel,
During the contested hearing before FERC, NCEMC dropped
dredging
it generally requires far le:
- ' only approaches its accui
proposal and the environmental issue became focused'
whether or not CP&L's expectation of dioxin burial
r.:
was reasonable.
staff and NCEMC witnesses claimed intermittent storm events would
__ Rather than attemp
the parameters shown on
previously settled dioxin -bearing solids and carry them downstream. CP
witnesses modified existing sediment transport
,'_.. of estimates for the parar
and dioxin water 4u
models to assess fate and transport of Pigeon River dioxin and eval
model behavior and that
available data. Parameter
benthic, plankton, and fish dioxin uptake data to assess the human
risk and concluded that no significant
_ listed in Table 1.
risk to human health existed,
Central to the impact evaluation process was the macro-scaleyF
�. The load, W, is the
"~ expected in the mill treat:
quality modeling approach employed to predict the concentration of d' '
that may be expected in Walters Lake and its underlying
"' plan is fully implemented.
it
sediments id
oncoming years as the lake begins to respond to the mill's now
In its effluent since
implementation stage of
implemented dioxin control program. This paper summarizes that an
concentration in the press
`
Model and Parameter Selection
some information was a'
_ quantity. A value of 2 pi
This objective was achieved by using a standard approach-
selected as an upper lim:
of the present measurem
modeling fate and transport of hydrophobic organic toxicants in re
1989).
water bodies. Time -dependent mass balances are written on the move
of sediment and toxic contaminants in the water column and sedim 40
layers. These coupled differential equations are
The lower end of tl•
dioxin from
s^":ad for solids'
toxicant concentrations as functions of time and a spectrum of physical
removal of ar
present after implementa:
chemical parameters. The latter are evaluated using available field.
_
P_,
literature data. Predictions of contaminant behavior are then made.
-� Thus, a range of
various scenarios.
placed on the mill effluen
For Walters Lake the model was patterned on a recent unpubl •
all model runs. Since the
dioxin concentrations in V
report circulated by EPA (circa 1990) in which the approach descn `r
above was applied to Lake Ontario. Though Lake Ontario is many tirri
effluent concentration, for
multiplying the given rur
the size of Walters Lake, the underlying mass balances and ope
- change is made in the 1.1,
mechanisms apply to Walters, as they do to any comparable water
The model is simply an application of WASP4, a computer
Lake in
program ev
from WASP (Di Toro et al. 1983), a general water quality model.
geometry
water surface area, A,,
RELICENSING HEARINGS ISSUES 303
eater quality. The source
schematic of the model and the model differential equations are shown in
:d Kraft pulp and paper""
Figure 1. The analytical solution to the system of coupled differential
equations in Figure 1 is given in Figure 2
was the impracticality:
These analytical solutions represent a departure from the numerical
edging proposal and,
solution approach used by many modelers, who are often unfamiliar with
,ntly upgraded to slim'
analytical solution techniques but who usually have readily available
en Walters Lake sedim
numerical solution software and plenty of computer time. An analytical
moved from the food ch
solution, if it can be developed from the conditions modeled, is best since
it generally requires far less computer run time and any numerical solution
ERC, NCEMC dropped
only approaches its accuracy.
;sue became focused
rial was reasonable. FI
Rather than attempting to select a single "best estimate" for each of
t storm events would
the parameters shown on Figure 1, we made a series of runs.using a range
y them downstream. CP -
of estimates for the parameters known to have a significant influence on
-t and dioxin water q
model behavior and that are difficult to estimate precisely due to lack of
River dioxin and evalu
available data. Parameter estimates selected for each of the nine runs are
assess the human he
listed in Table 1.
iman health existed.
y
the
The load, W, is the estimate of the dioxin concentration that can be
in the mill treatment effluent once the mill's dioxin control
was macro -scale water
expected plant
the concentration of dd
plan is fully implemented. The mill reported virtually nondetectable dioxin
nderlying sediments in" a _`
in its effluent since it began effluent sampling during the initial
nd to the miles now" fully Y
implementation stage of the dioxin control plan. Estimating a discharge
summarizes that analysis; _
concentration in the presence of multiple "nondetects" is not easy, though
some information was available to permit placing a range around this
quantity. A value of 2 picograms per liter (pg/I or parts per quadrillion),
_
selected as an upper limit, was obtained by taking half the detection limit
a standard approach:fof`
of the present measurements, a recognized procedure (Gilbert 1987; EPA
anic toxicants in receivi '
1989).
e written on the moveme
ter column and sedim
The lower end of the range was set at 0.2 pg/I and is based on 96%
ire solved for solids"_arid
removal of dioxin from an estimated original level of 5 pg/l, believed to be
i spectrum of physical clM
present after implementation of the initial stages of the dioxin control plan.
using available field
savior are then made' for.
Thus, a range of 0.2 to 2 pg/I, or one order of magnitude, was
;1
placed on the mill effluent concentration. A value of 1 pg/l was chosen for
all model runs. Since the model is linear with this single source of dioxin,
f on a recent unpublished: _ _
dioxin concentrations in Walters Lake water and sediment for any other mill
the approach descri -'° -
effluent concentration, for any given model run, can be obtained directly by
ke Ontario is many times
multiplying the given run results by that concentration, provided that no
balances and operativ®
change is made in the 1.93 m31s (44 mgd) plant flow utilized in these runs.
comparable water body'
)mputer program evolved
Lake geometry in the model is defined by the lake volume, V,, the
water quality model.,-.:','
water surface area, A,, the sediment -water interfacial area, Az, and the
2�� T
i f a L
4'
4.� }�. , • � Ski t � � }'tY
F trfjl' ■ � L
fi 1''
�' t .i • .ate t�
r _
4C.,.
a N.
7; • F
I ply
ksi. l Ji' t.
L 5.• St, i • 4~ 1�h .
Li
e�� r • =Tr s-r�,
�'2f•ya'E.
rt i• to
tt
• ..,r?S .*fit `" f
7 1. •. t , ��j.,4•+
•. Pi�i, dws"5p
k � •+7 -'r � � fk` � `i h ,ha .:J- SSA- 4 � , x. t e ,�
?� . I - .r` Y � I.S, � r i, >t L ,h F eN.r .t '* r � f• } 4 T �'
•, t
I
ti
!
11
Y
� . iiff
4
'
i
is
C'• - ,
• f
I
_
W I'
y
�4 '�' .s k
!t Y ,11 Sy.
'•
1 •
4rS
;c
ear ,,• N�*
RELICENSING HEARINGS ISSUES
(k4 (C.-w2/"2)-(CIO-x'I/^2]
C1 - (
4 k3)
amiss
WA7M
(k4
k
+Ei)
� w
(CIO -wI/kZ)-� (C20 W2/kz) +
kz
-
C2 =
/,
I k4(C2o-WA)-(Cio-wI/k
ina„rc
ou„o[
k _�1
ll 4
IQ
�
<`
(CIO-wl/k,)-kl (C,,-w2/k,) eh'+—
k
'
M","
u�
r
in which:
- kt + ki - 4k2
mI smear
11
_ _
2 , kl - K4 + Kt
- kI + ki - 4k2
�.a
%2
y
2 yy r ^2 K4 KI - K2 K2
A: Ca
wl
_ _ yy
WI K4 w2 WI •`3
A2 C.
- lI ++ K4
k _ 12 ++ K4
r
K3 4 KS
in which:
WI
- W / VI
2
r k AI V C
r I 1
Ki
= [Kl Vdr + far) A2 * Q + kv Vi + kY AI fdr + v, A2 f,r ] l Vi
v
I
A, CI -
KS
[y, A2 f,r + Kf A2 (fm +far) ] l V
2 + vd f,,] A2 C2
K4
— (v, + vd) A f,2 / V2
3alances
Figure 2. Analytical Solutions of Coupled Differential Equations
305
306
WATERPOWER '95
of
bbb =
peya�4
Hit.
b -
i g
o_
7�;
bbb b
b
beo.eee-
- _n^I�'
bib b
b
b
s
§e 51
9
.�
s
aHa s
bbb bl
pp
PI =
b-
.�
e
bib blb
d'�3oRl3a'_
-eo eee_
b
- -
e e
bbb b b
b
-
bbb bib
b
c
�
eae�illii'i�s
5! � i i ! I
� ii-•kII'}}
..:emu
r,jj.iJJ93J
o Zr1{
JIs
a�
<QXr!
22
=K
RELI
"active" sediment layer, V
existing measurements. ,
•:�•�
for analysis. Maximum
herein. Steady-state wa
Y'T!Gn.
change very little with ct
_
volume of the active laye
bottom -dwelling organist
sediment layer thickness
this parameter is often c
applications, the probat
t-
throughout the lake unde
_
(Brannon 1984) that sho%
layer of cover, suggestec
estimate for this param�
-
influenced by this param.
The three velocity
column settling velocity,
velocity for fine to mediur
of the spectrum of partic
deposition or burial ra
disappears below that la,
y
and biota, was varied bf
rate of 15 cm/yr and the I
The resuspension veloc
balance, given values of
respectively, to the meat
_
8.4 mg/I, since the lake is
and 0.5 kg/I, which corr
fraction of 0.38 and a sF
The fractions of
' TCDD) in the water col
Y . nonsettleable colloids, a
` .. respectively, with the s
denoting sediment. Ti
- - analysis of the partitions
•nonsettleable colloids ai
partition coefficient for ac
from the literature. The
.Lake Ontario report. Ti-,
'nonoperative
(fb=0) in tl
0.1395, the values of Cs -
-:volatile fraction ranging
)5
RELICENSING HEARINGS ISSUES 307
"active" sediment layer, V, The first three parameters were evaluated from
existing measurements. All three are functions of the pool elevation chosen
for analysis. Maximum pool elevation was . used for all runs presented
herein. Steady-state water column and sediment dioxin concentrations
change very little with change to average annual pool elevation. V2, the
• volume of the active layer of sediment through which biological activity of
bottom -dwelling organisms occufs, has been varied to correspond to
sediment layer thickness varying from 2 to 30.5 cm. Though the choice of
this parameter is often on the order of 2.5 to 15 cm for many sediment
applications, the probable existence of some scour and resuspension
throughout the lake under high flow conditions, and dredging experiments
(Brannon 1984) that show that effective capping requires mare than a thin
layer of cover, suggested the 30.5 cm choice for the high end of the range
estimate for this parameter. Only the time to achieve steady state is
influenced by this parameter, not the steady-state concentrations.
The three velocity parameters were chosen as follows: The water ;
column settling velocity, v,, was varied between the Stokes Law settling i
velocity for fine to medium silt to that for medium silt, a range representative
of the spectrum of particle sizes undergoing settling in the reservoir. The
deposition or burial rate, vd, the rate at which active layer material
disappears below that layer and no longer contributes.to the water column
and biota, was varied between the 1980-1990 average annual deposition
rate of 15 cm/yr and the projected 10-year average annual rate of 10 cm/yr.
The resuspension velocity, v,, is computed from the steady-state solids
balance, given values of v,, vd, C., and C,. The latter two were set equal,
respectively, to the measured average outflow suspended solids value of
8.4 mg/I, since the lake is considered"to be completely mixed in the model,
and 0.5 kg/I, which corresponds to the lakewide surface sediment solids
fraction of 0.38 and a speck gravity of 2.65.
The fractions of total 2,3,7,8-tetrachlorodibenzo-p-dioxin (2,3,7,8-
TCDD) in the water column and sediment that are dissolved, bound to
nonsettleable colloids, and adsorbed on solids are given by fd, fb, and f,,
respectively, with the subscript "1" denoting the water column and '7
denoting sediment. These parameters are obtained directly from an
== - analysis of the partitioning of the dioxin among the water media, binding
nonsettleable colloids and adsorbing organic solids. An organic carbon
partition coefficient for adsorption of 2,3,7,8-TCOD of 3.2 x 106 was chosen
from the literature. The basis for this choice is described in detail in the
Lake Ontario report. The nonsettleable colloid mechanism was assumed
~' nonoperative (fb=0) in these runs. The mean sediment volatile fraction of
0.1395, the values of C. and C. discussed above, and a suspended solids
volatile fraction ranging between 0.1395 and 0.80 were used to complete
=ate
308 WATERPOWER '95
R
the partitioning analysis, using the formulations provided in the Lake Ontario
report and discussed and justified in detail in Di Toro (1985).
An average annual runoff to the lake of 28 m3/s (1,000 cfs) was used ._
for water inflow and outflow. Pore water diffusion coefficient and
volatilization and photolysis unit rates were selected using the formulations
provided in the Lake Ontario report and adjusted for Waiters Lake =aw=
conditions. All three mechanisms make a negligible contribution to the'°
Walters Lake model, primarily due to the time scales. involved.
row cowmo
g W
Co.mln,im
C2o, the initial concentration of dioxin in the sediment, was chosen as
the 12 pg/g (parts per trillion) arithmetic average obtained from. a Jan s
January
I
(Y-" (10r:% l
1991 bottom -sampling program. A water column total 2,3,7,8-TCDD-.
0 l.75 X 10�
concentration of 1.75 pg/I, roughly in equilibrium with the sediment initial:
=
value, was chosen for the value of C,o.
,
i l.oz
Results
I °=
_
_
The analytical solutions for the water column and active sedim
7 1.02
e I
layer concentrations were solved on an HP 41 CX programmable calculator: ` =
1.07
10 I 1.01
for the nine sets of parameter values given in Table 1. Results for Run No.'
6 I l.o
5 are given in Table 2. This run reflects the "worst case" for the range -of.'
2D °-
parameters chosen for analysis; its combination of largest active Iayer:
thickness, smallest burial rate, and smallest water column organic fractior%..
result in the longest time to reach steady-state concentrations and the-w
highest such values.
The model output for the parameter sets of Table 1 is summarized
in Table 3. These values, which correspond to a mill effluent dioo$
concentration of 1 pg/1 at 1.93 m3/s flow, range from 0.0084 to 0.0144
T—, W,_
and compare favorably to the North Carolina water quality standard
cQ.aoo
dioxin of 0.014 pg/I. If the average annual mill effluent concentration is ' .
t C
rye, nv ovn
pg/I, and flow drops to 1.27 m3/s (29 mgd) as required by its MPD_
° 1•75X,P
permit, the range will drop to 0.0055 to 0.0095 pg/I. -
I '"
1.04
The North Carolina water quality standard on dioxin is one of:
- I ,.07
I 1.03
most stringent among the various states and well below the 1.2 pg/I
1.03
of neighboring Virginia, South Carolina, and Tennessee. The re
_ 6 i 1.03
expectation of achievement of that standard suggests strongly that the,
; 7 I 1.03
called "no action" alternative (better described as the "natural
` I l.m
alternative) of allowing the sediment to remain undisturbed the : -
10 I `a
I
depending instead on future settling of upstream "clean" sedin imenti
1'07
`' m
- �.. I
removal from environmental exposure, is a better choice than dred ' ;5.
l.m
w I ,.m
Dredging has many attendant difficulties, impracticalities, and costs, to;`
2 '95
ions provided in the Lake Ontario
lil in Di Toro (1985).
of 28 m3/s (1,000 cis) was used
water diffusion coefficient and
e selected using the formulations
ind adjusted for Walters Lake
a negligible contribution to the
time scales involved.
i in the sediment, was chosen as
verage obtained from a January
tter column total 2,3,7,8-TCDD
iilibrium with the sediment initial
f•rF
ter column and active sediment
' 41 CX programmable calculator
I in Table 1. Results for Run No.
he 'Worst case" for the range of
Ibination of largest active layer
st water column organic fraction:.=
iy-state concentrations and the
r sets of Table 1 is summarized.,'�"..,.
spond to a mill effluent dio= .
3nge from 0.0084 to 0.0144 pgVUf
Dlina water quality standard for
►I mill effluent concentration is 1.;
gd) as required by its MPDi=S
3095 pg/I.
:andard on dioxin is one of the
nd well below the 1.2 pg/I value
id Tennessee. The reaso
d suggests strongly that the soy.
:ribed as the 11natural capping'
emain undisturbed in the lake,:
ipstream "clean" sediments for"
a better choice than dredgirsg.
npracticalities, and -costs, to say,.
r,
RELICENSING HEARINGS ISSUES 309
Table 2
Walters Lake Dioxin Model
Run #1
t
(Y-)
Taal Wale C== L).-
Caemlruon
C,
I (IQ' D[/11
Di. -Id wale C.Wmn
Dinar C---
"Ere n
To1.1 Sedimv" Dw,ia
Caaenavlon
I - C.
(W py)
MM of Se6lm t D6.in
PW Ms of Sed&-,
S
Cy
(PVr-1
0
I 1.75 R I)d
0.85 : 1$
6.00
12.00
1
1.02
051
I 0.31
0.61
I 1.02
0.51
I 0.30
0.61
3
I 1.02
0.30
Mill
4 I 1.02
1 03!
OX
0.61
5 i 1.02
03�
I 0.30
1 0.61
6 1.02
0S1
I 0.30
I 0.61
7 1.02
I 0.51
I 0.30
I 0.61
e 1.05 I
0.51
0.30
I 0.61
10 1.02 I
0.51 0.30
I 061
IS La! I
031 030
0.61
20 1.02
0.51 0.30
I 0.61
50 !.u_ I
03: 1 0.30
I 0.61
Table 7
Walters Lake Dioxin Model
Run #2
t
(real
Taal W- Como DbaY.
Ca.aolnlm
c
(10a 411, 1
-,4 W.- -.
N.. Ca.am
C
(IQ` xm
I Taal S 1-1 Dio[in
mcaan Claa .
c1
(10' 0P/)
Mao .1--, Diem
Pb rf Se6en 1m1
M. o
S.M.
eta
(1NIoa)
0
1 Ln x IP
0." a le.
6.ao
12.00
1
_
I 1.34 i
0.67
0.35
1.10
=
1.01
0_•2
I 0.72
0.64
3
I 101 1
0.3:
0.31
1 0.62
4
I I.Q1 I
0 '!
031
I 0.62
5
I 1.03
03:
I 031
I 0.62
6
I 1.03
03l
0.31
0.62
7
I I.O3 I
0.51
0.31
0.62
6
1 03 1
0!:
I 0.31 I
0.62
10
1.0 I
-or,:
1 031 I
0.62
15
! LO3 1
0A! I
O31 I
062
20
1 1.03
0'!1
I 031 I
0.62
so
1.03
0!. I
031
0.62
310 WATERPOWER '95
nothing of the fact that the dredging alternative creates environrr
exposure of the deeper sediments that does not now occur.
References
Brannon, J.M., R.E. Fioeppel, and D. Gunnison. 1984. Efficiency of cap
contaminated dredged material. Environmental Laboratories, U.S.)
Engineer Waterways Experiment Station. Proc. 1984 Dredging C
ASCE. Vol. Z pp, 664-673.
Di Toro, D.M. 1985. A particle interaction model of reversible org
chemical sorption. Chemosphere, Vol. 14, No. 10, pp. 1503-1538.
Di Toro, D.M., J.J. Fitzpatrick, and R.V. Thomann. 1983. Documentaioi
water quality analysis simulation program (WASP) and model verifica
program (MVP). EPA, Duluth, MN.
Gilbert, R.O. 1987. Statistical methods for environmental
monitoring. Public Northwest Laboratory. New York: Van Nostr,
Reinhold Company. .
U.S. Environmental Protection Agency (EPA). 1989. Statistical anal
ground -water monitoring data for RCRA facilities - Interim final guh
February 1989. Office of Solid Waste, Waste Management Di
Washington, DC.
U.S. Environmental Protection Agency (EPA). Circa 1990. Lake C
TCDD modeling report. Environmental Research Laboratory,
Duluth, MN.
Abstract
Public Utilit}
owns and operateE
located on the COIL
to protect juvenile
their downstream r
efforts at Rocky Re
alternative collectic
attract the migrating
the fish's natural be
approach flow cha
being tested during
Migrating salmon
forebay hydraulic
develop the surfac
M_
.ar, ASCE, P:
Redmond, `
3r, ASCE, F
County, 32
gal, Parame
State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
Asheville Regional Office
MEMORANDUM
TO:
FROM:
SUBJECT:
June 20, 1996
Memo to the File
Roy M. Davis R
Q��
E)EHHNF;Z
Sediment Sampling of Waterville Reservoir
Haywood County
On June 20, 1996, I received a telephone call from Mr.
Daniel McKinney of the Tennessee Wildlife Resources
Agency in which I was informed that plans to sample
sediment in Waterville Reservoir have been put on hold.
xc: Steve Tedder
Keith Haynes
Ken Eagleson
Jay Sauber
Derrick Brown
Phil Lucus
Interchange Building, 59 Woodfin Place Nil
FAX 704-251-6452
Asheville, North Carolina 28801 An Equal Opportunity/Affirmative Action Employer
Voice 704-251-6208 50% recycled/10% post -consumer paper
Response of aquatic organisms to pulp and p, iill effluents E n. Toxicol. Chem. 15, 1996 515
Table 1. Source and location for six pulp and paper effluents used for comparative toxicity testing
with Ceriodaphnia dubia and juvenile Anodonta imbecillis
Facility
River and mile,
Volume
(MGD)b
Product description
Mead
Holston River 2.5
10
Fine printing and writing pa-
per
Sunoco
Pigeon River 0.6
0.1
Specialty paper board from
waste paper
Kimberly Clark
Tennessee River 589.7
1.4
Sanitary paper products from
waste paper
Bowater
Hiwassee River 17.0
44
Newspaper and pulp produc-
tion
Inland
Tennessee River 94.4
4.1
Corrugating medium and pa-
perboard from waste paper
Packaging
Tennessee River 205.4
31.7
Unbleached kraft pulp and pa-
perboard
'Mile points as measured from the mouth of the river
bMGD: million gallons per day.
response of A. imbecillis, C. dubia, and Promelas promelas to
selected containments. Comparative response data are useful to
insure that WET limitations are appropriate to protect repre-
sentative components of the aquatic community.
METHODS
Grab samples of final treated effluent from six pulp and
paper industries were collected in 5-liter plastic containers.
Approximately 60 liters of effluent representative of the waste
stream were collected from each industry. Approximately 15
liters of effluent are required for the 7-d chronic C. dubia test
and 30 liters for the 9-d acute juvenile mussel test. Effluent
samples were placed on ice for transport and maintained in
the laboratory at 4°C. The effluent samples differed according
to the type of manufacturing methodology (Table 1).
There are several possibilities for estimating a chronic no -
observable -effect -concentration (NOEL) value from data gen-
erated by an acute test. The EPA [1] recommends the use of
an acute to chronic ratio (ACR) for establishing a NOEC for
the release of complex whole effluents. Given the margin of
safety inherent with the calculation of a chronic receiving wa-
ter waste concentration, EPA assumes an ACR of 10 should
provide ample protection against chronic instream effects.
Hence, an ACR of 10 (where the acute LC50 - 10 = chronic
NOEC) is recommended where acute data are available and
chronic data are either inadequate or unavailable. Another ap-
proach was demonstrated by TVA in 1990; Schweinforth and
Wade [12] report results from an acute 9-d test and a sub -
chronic 90-d test on A. imbecillis using manganese as the
reference toxicant. The ACR calculated using the acute sur-
vival and subchronic growth data was six (where the acute
LC50 - 6 = chronic NOEC).
The 7-d daily -renewal chronic tests with C. dubia neonates
less than 24 h old followed recommendations of the EPA [13].
Test concentrations generally included exposure to 100%,
50%, 25%, and 12.5% effluent diluted with synthetic water.
Results were statistically analyzed utilizing a computer pro-
gram provided by EPA. Toxicity endpoints included repro-
duction and mortality. Ninety -six -hour acute LC50, 7-d chron-
ic LC50, and a 7-d NOEC were estimated from the data fol-
lowing EPA [13] statistical procedures. Ceriodaphnia dubia
testing was conducted by EMPE, Inc., Nashville, Tennessee.
The 9-d acute test using 6-d-old juvenile A. imbecillis fol-
lowed the methodology reported by Wade et al. [4]. The test
consisted of exposing test organisms to serial dilutions of the
effluent diluted with 5-µm bag -filtered nontoxic Tennessee
River water. Dilution water was collected prior to testing and
maintained under aeration for use in preparing daily renewals.
There were 15 juvenile mussels in each 250-ml test chamber
and there were three replicate test chambers for each effluent
dilution. The test control consisted of three replicate test cham-
bers with dilution water. All test solutions were renewed daily.
Each replicate was provided daily with 600-800 mg/L of pre-
screened (100 µm) silt and 6 ml/L of algal concentrate. Silt
was obtained from a spring -fed pond, which was the collection
site for adult mussels used a brood stock for producing ju-
veniles. Algae (phytoplankton) was harvested from I I2-meter-
long outdoor mesocosms supplied continuously with Tennes-
see River water, bloomed in glass aquaria, concentrated by
centrifugation, and stored at 4°C to provide the algal concen-
trate. Both sediment and algae are essential for juvenile mussel
health and survival [3]. Mussels were confined in 50-mm-
diameter glass cylinders fitted with a bottom of 100-m NitexR
screen to facilitate handling, observation, and daily renewal.
Wade [7] summarized both the test protocol (Appendix 1) and
toxicity endpoints (Appendix 2). Dissolved oxygen, temper-
ature, and pH measurements were made at the start and con-
clusion of each 24-h renewal. Hardness, alkalinity, and con-
ductivity also were measured initially and on alternating days
in high and low test concentrations during the test. Toxicity
endpoints (LC50) were determined using either semilog plots
or probit analysis (EPA version 1.4), based on results of tests
for meeting statistical assumptions and the occurrence of par-
tial mortalities (<100%) within test treatments. The NOEC
values were estimated using acute survival endpoints and the
two (EPA and TVA) ACRs. Anodonta imbecillis testing was
conducted at the TVA Toxicity Testing Laboratory, Browns
Ferry Nuclear Plant Site, Athens, Alabama.
RESULTS
Only two of the six industries evaluated exhibited acute (96-
h) survival effects to C. dubia (Table 2). By comparison, four
industries impaired survival during the 9-d acute exposure for
mussels. Of the industries affecting acute survival of both
daphnids and mussels, Inland produced the greatest difference.
Inland's 96-h LC50 for daphnids was 9.6% effluent compared
to a 9-d LC50 for mussels of 2.2% effluent, making the effluent
from this industry approximately four times more toxic to mus-
516 Environ. Toxicol. Ch . 15 6
Table 2. Comparative whole effluent toxicity between
Ceriodaphnia dubia and juvenile Anodonta imbecillis exposed to
pulp and paper effluents from industries discharging to the
Tennessee River Valley
Effluent concn. (%)
Anodonta
Ceriodaphnia
NOEC
96-h
7-d
7-d
9-d
Industry
LC50
LC50 NOEC
LC50
(EPA) (TVAb)
Mead
> 100
> 100
12.5
> 100
10 16.6
Sunoco
70.7
65.9
25
64.3
6.4 10.7
Kimberly Clark
> 100
> 100
100
> 100
- -°
Bowater
> 100
> 100
50
92.5
9.3 15.4
Inland
9.6
8.8
3.1
2.2
0.22 0.36
Packaging
> 100
> 100
25
38.6
3.9 6.4
EPA method: acute LC50 - 10 = NOEC; ACR = 10.
bTVA method: acute LC50 _ 6 = NOEC; ACR = 6 (based on 90-d
growth response of juvenile mussels exposed to manganese).
'Effluent contained no toxicity.
sels than daphnids during the acute exposure periods considered
appropriate for the two test species. The other industry exhib-
iting acute effects to both daphnids and mussels, Sunoco, was
only slightly more toxic to mussels than daphnids (Table 2).
Five of the six industries exhibited chronic (7-d) impairments
to daphnids, based on sublethal (reproduction) effects. Acute
chronic ratios for these industries ranged from 2.0 (Bowater) to
8.0 (Mead). Conversion of mussel acute data to chronic NOEC
values using an ACR of either 10 (EPA) or 6 (TVA) resulted
in estimates that indicated mussels were more sensitive than
daphnids to the selected effluents in every case but one (Table
3). In the one exception (Mead), daphnids were more sensitive
than mussels when TVAs ACR was applied to the mussel acute
data. The estimated chronic toxicity of Inland's effluent to mus-
sels was approximately an order of magnitude greater than the
measured chronic toxicity to daphnids. Kimberly Clark's efflu-
ent did not exhibit toxicity to either test species.
DISCUSSION
The U.S. Fish and Wildlife Service reports that the North
American assemblage of native freshwater mussels once in-
cluded approximately 300 species of which 18 are now extinct;
an additional 65 species face extinction within the next decade
[14]. Adams and Alderman [15] report the disappearance of
mussels by genus as a result of ecosystem/mussel fragmentation.
Factors contributing to loss of mussels may include pollution
from point and non -point sources, habitat destruction in the form
Table 3. Values by which juvenile Anodonta imbecillis are more
sensitive than Ceriodaphnia dubia to whole effluent toxicity as
calculated using two methods
EPAa
TVAb
Mead
1.3
0.8
Sunoco
3.9
2.3
Kimberly Clark
-
-
Bowater
5.4
3.3
Inland
14.1
8.6
Packaging
6.4
3.9
,EPA method: acute LC50 - 10 = NOEC; ACR = 10.
bTVA method: acute LC50 - 6 = NOEC; ACR = 6 (based on 90-d
growth response of juvenile mussels exposed to manganese).
cEffluent contained no toxicity.
A.D. McKinney and D.C. Wade
of impoundment and channelization of streams and rivers, and
the resultant loss of the assemblage of fish hosts that are nec-
essary for successful freshwater mussel reproduction.
The mussel fauna remaining in the Tennessee River system
is considered to be one of the most diverse in North America
[16]. However, of the approximately 80 species in this com-
munity, 30 are considered likely to go extinct in the near future.
The prospective loss of nearly 40% of molluscan diversity
from the Tennessee River system within the next decade is
clear evidence of the inadequacy of effort to protect this im-
portant component of our aquatic resource heritage.
The use of juvenile mussels as test organisms in toxicity
testing is an exciting new approach in determining a critical
lifestage response of freshwater mussels to complex whole
effluents. Data collected from such tests may provide greater
understanding of the causes of the decline of mussel species
and support protection of remaining mussel fauna.
The EPA advocates the use of standardized bioassay meth-
odologies for toxicity test with whole effluents. However, tests
that use pelagic or epibenthic organisms may not adequately
delineate toxicity to critical lifestages of benthic community
organisms. Results to date indicate that C. dubia are less sen-
sitive than A. imbecillis to selected complex whole effluents
from pulp and paper manufacturing and may be inadequate as
a surrogate for the freshwater mussel component of the benthic
community. In the absence of comparative data, whole effluent
toxicity limitations on NPDES permits may be protective of
aquatic organisms whose tolerance is in the C. dubia chronic
NOEC range while simultaneously failing to protect down-
stream mussel resources.
Sensitivity of freshwater mussels also should be compared
to other benthic species, namely H. azteca (amphipod) and C.
tentans (midge) recently included as standard whole -sediment
test organisms in the national contaminated sediment man-
agement strategy [17-19]. These comparisons should be used
to confirm that standard tests are protective of freshwater mus-
sels where they occur.
The relative sensitivity of juveniles from different species
of freshwater mussels to specific contaminants or complex
whole effluents is virtually unknown. Anodonta imbecillis may
be more tolerant of elevated temperature, low dissolved ox-
ygen, siltation, and extended periods of no flow than many
species of freshwater mussels. The ability of A. imbecillis to
colonize ponds successfully in agricultural settings may in-
dicate a tolerance for selected organic contaminants. While
these factors imply that other mussel species may be more
sensitive than A. imbecillis, the lack of adequate test protocols
for other species, especially those preferring flowing water
habitats, precludes their use in toxicity tests.
Acknowledgement -This project is a cooperative effort that includes
the Tennessee Department of Environment and Conservation, Division
of Water Pollution Control. Ceriodaphnia testing was conducted by
EMPE, Inc of Nashville, Tennessee. Janet Posey transformed mussel
larvae into juveniles and played a major role in this effort.
REFERENCES
1. U.S. Environmental Protection Agency. 1991. Technical sup-
port document for water quality -based toxics control. EPA 5051
2-90/001. Office of Water, Washington, DC.
2. Isom, B.G. and R.G. Hudson. 1984. Culture of freshwater mussel
glochidia in an artificial habitat utilizing complex liquid growth me-
dia. U.S. Patent 4, 449, 480. 18. Patent Office, Washington, DC.
3. Hudson, R.G. and B.G. Isom. 1984. Rearing juveniles of the
Response of aquatic organisms to pulp and r mill effluents
freshwater mussel (Unionidae) in a laboratory setting. Nautilus
8:129-135.
4. Wade, D.C., R.G. Hudson and A.D. McKinney. 1989. The use
of juvenile freshwater mussels as a laboratory test species for
evaluating environmental toxicity. Abstracts, loth Annual Meet-
ing, Society of Environmental Toxicology and Chemistry, To-
ronto, Ontario, Canada, October 28-November 2.
5. Oesch, R.D. 1984. Missouri Naiades: A guide to the mussels of
Missouri. Missouri Department of Conservation,. Jefferson City,
MO, USA, pp. 34-36.
6. Gordon, M.E. and J. B. Layzer. 1989. Mussels (Bivalvia: Union-
oidea) of the Cumberland River; review of life histories and eco-
logical relationships: U.S. Fish Wildl. Serv. Biol. Rep. 89:6-7.
7. Wade, D.C. 1990. Screening toxicity evaluation of Wheeler Res-
ervoir sediments using juvenile freshwater mussels (Anodonta im-
becillis SAY) exposed to sediment interstitial water. TVA/WR/AB-
90/13. Tennessee Valley Authority, Muscle Shoals, AL, USA.
8. Wade, D.C. 1992. Definitive evaluation of Wheeler Reservoir
sediment toxicity using juvenile freshwater mussels (Anodonta
imbecillis SAY). TVA/WR-92/25. Tennessee Valley Authority,
Muscle Shoals, AL, USA.
9. Hudson, R.G., D.C. Wade and A.D. McKinney. 1994. Com-
parative response of selected non -target aquatic organisms to
commercial molluscicide. Abstracts, 15th Annual Meeting, So-
ciety of Environmental Toxicology and Chemistry, Denver, CO,
USA, October 30-November 3.
10. McCann, M.T. and R.J. Neves. 1992. Toxicity of coal related
contaminants to early lifestages of freshwater mussels in the Pow-
ell River, Virginia. U.S. Fish Wildl. Serv. Final Rep.
11. Keller, A.E. 1993. Active toxicity of several pesticides, organic
compounds and a wastewater effluent to the freshwater mussel,
Anodonta imbecillis, Ceriodaphnia dubia, and Pimephales pro-
melas. Bull. Environ. Contam. Toxicol. 51:696-702.
12. Schweinforth, R.L. and D.C. Wade. 1990. Effects from sub -
chronic 90-day exposure of in vitro transformed juvenile fresh-
water mussels (Anodonta imbecillis to manganese. Abstracts,
11th Annual Meeting, Society of Toxicology and Chemistry, Ar-
lington, VA, USA, November 11-15, p. 190.
13. U.S. Environmental Protection Agency. 1989. Short-term methods
for estimating the chronic toxicity of effluents and receiving waters
to freshwater organisms; Cladoceran, Ceriodaphnia dubia, survival
and reproduction test, method 1002.0. EPA/600/4-89/001. Environ-
mental Monitoring Systems Laboratory, Cincinnati, OH, USA.
14. Shannon, L., R.G. Biggins and R.E. Hylton. 1993. Freshwater
mussels in peril; perspective of the U.S. Fish and Wildlife Service.
Proceedings, Upper Mississippi River Conservation Committee:
Conservation and Management of Freshwater Mussels, St. Louis,
MO, USA, October 12-14, 1992, pp. 66-68.
15. Adams, W.F. and J.M. Alderman. 1993. Reviewing the status of
your state's molluscan fauna: The case for a systematic approach.
Proceedings, Upper Mississippi River Conservation Committee:
Conservation and Management of Freshwater Mussels, St. Louis,
MO, USA, October 12-14, 1992, USA, pp. 83-88.
16. Starnes, L.B. and A.E. Bogan. 1988. The mussels (Mollusca:
Bivalvia: Unionidae) of Tennessee. Am. Malacol. Bull 6:19-37.
17. U.S. Environmental Protection Agency. 1994. Contaminated
Sediment Management Strategy. EPA 823-R-94-001. Office of
Water, Washington, DC.
18. U.S. Environmental Protection Agency. 1994. Evaluation of
dredged material proposed for discharge in waters of the U.S.
Testing Manual (Draft), Inland Testing Manual. EPA-823-B-94-
002. Office of Water, Washington, DC.
19. U.S. Environmental Protection Agency. 1994. Methods for
measuring the toxicity and bioaccumulation of sediment -associ-
ated contaminants with freshwater Invertebrates. EPA 600/R-94/
024. Office of Research and Development, Duluth, MN.
ron. Toxicol. Chem. 15, 1996 517
APPENDIX A
Summary of test protocol conditions for conducting toxicity tests
using juvenile freshwater mussels (Anodonta imbecillis) [7].
Test species
Anodonta imbecillis (freshwater mussel,
Unionidae)
Test type
Static, daily renewal
Temperature
24 ± 1°C
Photoperiod
Dark
Test chamber vol-
250 ml
ume
Renewal of test solu-
Daily
tions
Age of test organ-
6-10 d old
isms
Number mussels per
15
replicate
Replicates per con-
3
centration
Feeding regime
Daily -concentrated indigenous algae
bloomed in dilution water. Also clean silt
(filtered through 100-µm Nitex® to facili-
tate daily observations)
Aeration
None
Dilution water
5-µm bag -filtered receiving water
Test duration
9 d
Effect measured
Stress -impaired movement; mortality -ab-
sence of ciliary action or empty shells
APPENDIX B
Toxicity endpoints; critiera used to evaluate stress and differentiate
between living and dead juveniles [7].
Alive/active Foot protrudes from shell within a minute of
settling to the bottom of the dish; foot lo-
cates dish bottom and "flips" shell into an
upright position; mussel glides along dish
bottom on extended foot.
Alive/stressed Shell remains closed or gapes open with foot
immobile and protruding; close observation
reveals only slight foot motion; ciliary action
obvious.
Dead Shell gaped open with detrital material adhered
to soft tissues just within the shell (indicating
absence of ciliary movement, which sweeps
this area clean in live, active, and stressed
mussels); and/or decomposition of soft parts
(indistinguishable foot, organs, etc., usually
accompanied by protozoans within the shell);
or empty shells.
/,08/96 14,27 r$`^"" 145 6005 CF&L-FPBD/FOD R1001/002
C
Cardin Power & Light Company
PO Box 1551
411 Fayette�ilie Street Mall
Raleigh NC 27602
Ms. Lois D. Cashell
Secretary
Federal Energy Regulatory Commission
Maid Code: DPCA, RL 21.3
988 First Street, N. E.
Washington D. C. 20426
March 8, 1996
Post-lt' brand fax transmittal memo 7Ei1 naf A�� .
WALTFAS HYDROELECTRIC PROJECT NO.432
ARTICLE 403 - RESERVOIR SURFACE WATER ELEVATION
Dear Ms. Cashell:
GAT L'
The purpose of this letter is to report an occurrence pursuant W Article 403 of the Walters
Hydroelectric Project No. 432 License. Article 403 generally requires C &L to operate the
project so that the reservoir surface water elev4otn does not fall below elevation 2232 feet
National Geodetic Vertical Datum (NGVD). Article 403 further provides that this requirement is
satisfied unless the surface water elevation 511s below 2232 feet NGVD for more thaw 120 hours
in any one calendar year, below 2232 feet NGVD for more than 30 hours during any one seven-
day period, or below 2228 feet NGVD at anytime. CP&L inadvertently exceeded the 30 hour
provision of this license article by going below 2232 feet NGVD for a 40 hour period beginning
at 10:00 p.m. on March 2 and ending at 2:00 p.m. on Match 4,1996. A summary report on this
occurrence and the steps CP&L intends to take to minimize the possibility of a recnn=ce are set
forth below.
In February 1996, the plant staff at Walters had identified a problem requiring maintenance with
a company dock on the Walters reservoir. Plant personnel use the dock for accessing company
boats when performing routine maintenance and surveillance activities on and around the
reservoir, intake, and dam. The most desirable condition fur making the necessary repairs was to
lower the lake to the minimum elevation allowable by the terms of the license. Several attempts
were made during February to lower the lake, but these efforts were uusuccessful due to system
needs and lake inflows. Conditions for lowering the lake over the March 2-3 wmkmd were
favorable and steps were taken to operate the plant in such a manner as to lower the surface water
elevation. This was done in anticipation of the work being performed the week of March 4.
However, an error occurred when company personnel did not tale steps to ensure that the
reservoir elevation did not go below elevation 2232 feet NGVD while attempting to facilitate the
needed repair.
l3/06/96 14:28 i46 6005 .CP&L-FPBD/FQD IM 002/002
Memorandum 2 March 8, 1996
The problem was identified by plant management on Monday morning (March 4) and steps were
taken to bring the plant off-line and allow the lake to recover to a level above 2232 feet NGVD_
The lake was at 2230 feet NGVD at approximately 8:00 a.m. on Monday morning (March 4)
when these steps were taken. The plant remained off -hue, and by 2:00 p.m. on Monday the lake
elevation was above 2232 feet NGVD.
The reservoir elevation was never at, or below, the 2228 feet NGVD minimum elevation
prescribed by Article 403 during this event This event did not occur during any storm event
wNch would have increased the inflows during the recovery period. The lake recovery, was
achieved with only normal inflows.
CP&L will ensure that appropriate measures are implemented to rnin;� the possibility of this
situation recurring in the future_ We intend to program the plant computer to send an ,alarm to
the operator as the lake surface water elevation approaches 2232 feet NGVD. We anticipate this
alarm being operational within 60 to 90 days.
The License Article 403 requires CF&L to provide written notificatioft to the FERC as soon as
possible, but no later than ten (10) days after each such ocewmence. In accordance with Article
403, CP&L is providing copies of this filing to the North Carolina Department of Fnvironment,
Health and Natural resources (NCDEHNR) and to the Tennessee Wildlife Resources Agency
(TWR.A). We have also made verbal notification to NCDEM M and TWRA and will £ollowup
with each agency as appropriate.
If yowl have any questions or comments regarding this platter, please call Mr. Phil Lucas at (919)
546-7595.
Sincerely,
L`q5-Arn05r' P.
Manager - Civil Engineering
Fossil Generation Department
PJLlpvh
(20032 )
.A,ttaclnent
C: Mr. A. D. McXinney (TWRA)
Mr. S. W. Tedder (NCDMNR)
c.
State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
Asheville Regional Office
June 17, 1996
Mr. David McKinney, Chief
Tennessee Wildlife Resources Agency
Ellington Agricultural Center
Post Office Box 40747
Nashville, Tennessee 37204
Dear Mr. McKinney:
DEHNR
Subject: Sediment Sampling of
Waterville Reservoir
Haywood County
I have your June 14, 1996 letter with attachment, in which you
discuss the proposed sediment sampling of Waterville Reservoir in
North Carolina by the Tennessee Wildlife Resources Agency. The
purpose of this sampling, as stated in your letter, would be to
determine if the Pigeon River has improved sufficiently to allow the
reintroduction of the fresh water mussel.
If you would like to approach this as a cooperative undertaking
between the North Carolina Division of Environmental Management and
the Tennessee Wildlife Resources Agency, I would suggest you delay
your planned June 23 1996, sampling run to allow certain details to
be first worked out. Obviously we would be interested in receiving
any analytical results you obtain from this effort.
Please give Mr. Keith Haynes or me a call at 704/251-6208.
(Sincerely,
Roy M. Davis
Regional Supervisor
xc: Steve Tedder /
Keith Haynes
Ken Eagleson
Jay Sauber
Derrick Brown
Phil Lucus
Interchange Building, 59 Woodfin Place �� FAX 704-251-6452
Asheville, North Carolina 28801 Nvf An Equal Opportunity/Affirmative Action Employer
Voice 704-251-6208. UYEPT23 M.7 50% recycled/10% post -consumer paper
CP&L
Carolina Power & Light Company
PO Box 1551
411 Fayetteville Street Mall
Raleigh NC 27602
Ms. Lois D. Cashell
Secretary
Federal Energy Regulatory Commission
Mail Code: DPCA, HL 21.3
888 First Street, N. E.
Washington D. C. 20426
c
March 8, 1996
WALTERS HYDROELECTRIC PROJECT NO. 432
ARTICLE 403 - RESERVOIR SURFACE WATER ELEVATION
Dear Ms. Cashell:
The purpose of this letter is to report an occurrence pursuant to Article 403 of the Walters
Hydroelectric Project No. 432 License. Article 403 generally requires CP&L to operate the
project so that the reservoir surface water elevation does not fall below elevation 2232 feet
National Geodetic Vertical Datum (NGVD). Article 403 further provides that this requirement is
satisfied unless the surface water elevation falls below 2232 feet NGVD for more than 120 hours
in any one calendar year, below 2232 feet NGVD for more than 30 hours during any one seven-
day period, or below 2228 feet NGVD at anytime. CP&L inadvertently exceeded the 30 hour
provision of this license article by going below 2232 feet NGVD for a 40 hour period beginning
at 10:00 p.m. on March 2 and ending at 2:00 p.m. on March 4, 1996. A summary report on this
occurrence and the steps CP&L. intends to take to rrinimize the possibility of a recurrence are set
forth below.
In February 1996, the plant staff at Walters had identified a problem requiring maintenance with
a company dock on the Walters reservoir. Plant personnel use the dock for accessing company
boats when performing routine maintenance and surveillance activities on and around the
reservoir, intake, and dam. The most desirable condition for making the necessary repairs was to
lower the lake to the minimum elevation allowable by the terms of the license. Several attempts
were made during February to lower the lake, but these efforts were unsuccessful due to system
needs and lake inflows. Conditions for lowering the lake over the March 2-3 weekend were
favorable and steps were taken to operate the plant in such a manner as to lower the surface water
elevation. This was done in anticipation of the work being performed the week of March 4.
However, an error occurred when company personnel did not take steps to ensure that the
reservoir elevation did not go below elevation 2232 feet NGVD while attempting to facilitate the
needed repair.
Memorandum 2 March 8, 1996
The problem was identified by plant management on Monday morning (March 4) and steps were
taken to bring the plant off-line and allow the lake to recover to a level above 2232 feet NGVD.
The lake was at 2230 feet NGVD at approximately 8:00 a.m. on Monday morning (March 4)
when these steps were taken. The plant remained off-line, and by 2:00 p.m. on Monday the lake
elevation was above 2232 feet NGVD.
The reservoir elevation was never at, or below, the 2228 feet NGVD minimum elevation
prescribed by Article 403 during this event. This event did not occur during any storm event
which would have increased the inflows during the recovery period. The lake recovery was
achieved with only normal inflows.
CP&L will ensure that appropriate measures are impiemented to minimize the possibility of this
situation recurring in the future. We intend to program the plant computer to send an alarm to
the operator as the lake surface water elevation approaches 2232 feet NGVD. We anticipate this
alarm being operational within 60 to 90 days.
The License Article 403 requires CP&L to provide written notification to the FERC as soon as
possible, but no later than ten (10) days after each such occurrence. In accordance with Article
403, CP&L is providing copies of this filing to the North Carolina Department of Environment,
Health and Natural Resources (NCDEHNR) and to the Tennessee Wildlife Resources Agency
(TWRA). We have also made verbal notification to NCDEHNR and TWRA and will followup
with each agency as appropriate.
If you have any questions or comments regarding this matter, please call Mr. Phil Lucas at (919)
546-7585.
Sincerely,
/d
Earry Arney, P.
Manager - Civil Engineering
Fossil Generation Department
PJL/pvh
(20032 )
Attachment
c: Mr. A. D. McKinney (TWRA)
Mr. S. W. Tedder (NCDEHNR)
�-..' Z
-r
t
State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
Nann B, Guthrie, Regional Manager
Asheville Regional Office
Dr. George J. Oliver
Carolina Power & Light
Post Office Box 1551
411 Fayetteville Street
Raleigh, North Carolina
Dear Dr. Oliver:
_��74
-
��HNR
WATER QUALITY SECTION
Company
Mall
27602
Subject: Review of License
Articles 406 and 408
Walters Hydroelectric Plant
FERC Project No. 432
Haywood County
Staff of our Asheville Regional Office has reviewed CP&L's
proposed plans and schedules for the subject license articles and
offers the following comments:
Article 406
It is mentioned that an audible alarm will be installed in
order to notify plant personnel when the flow is decreasing
to near the 100 cfs level so flow augmentation can be
implemented. The flow level at which the alarm will sound
is not stated. It is our opinion that the alarm should be
set to sound at 110 cfs, or at a level deemed approiate by
CP&L, which will allow plant personnel to have adequate
time to respond to the decrease in flow and to make the
necessary adjustments.
Article 408
It is stated that the flow data obtained from -the new gaging
station will be collected on a routine basis and archived;
however, it is not mentioned at what interval the data will
be collected.
Interchange Building, 59 Woodfin Place, Asheville, N.C. 28801 Telephone 704-251-6208 FAX 704-251-6452
An Equal Opportunity Affirmative Action Employer . 50% recycled/ 10% post -consumer paper
Dr. George J. Oliver
Page Two
The Division appreciates the opportunity to comment on your
effo:fts to meet the FERC license implementation requirements.
a
If you have any questions concerning this matter, or if we
can be of further assistance, please do not hesitate to contact
Mr. Forrest Westall of our Asheville Regional Office at 704-251-
6208.
Sincerely,
Steve W. Tedder, Chief
Water Quality Section
CC: Forrest Westall
AL
I
II
Carolina Power & Light Company
PO Box 1551
Al 1 Fayetteville Street Mall
Raleigh NC 27602
Ms. Lois D. Cashell
Secretary
Federal Energy Regulatory Commission
Mail Code: DPCA, HL 21.3
888 1st Street N. E.
Washington D.C. 20426
r
WALTERS HYDROELECTRIC PROJECT NO.432
ARTICLE 403 - ANNUAL REPORT ON 1995 LAKE LEVEL ELEVATION
Dear Ms. Cashell:
February 14, 1996
� 22
ljjclrcq UA
PTY
'T1G1V �FC
The purpose of this letter is to file the lake level elevations report for the previous year as required by Article
403 of our license. Attached are an original and eight copies of a graph depicting the hourly lake elevations
for the calender year 1995 at the Walters Hydroelectric Project No. 432. As required by Article 403, we are
also providing copies of this filing to the North Carolina Department of Environment, Health and Natural
Resources (NCDEHNR) and Tennessee Wildlife Resource Agency (TWRA).
If you have any questions regarding this matter, please call Mr. Phil Lucas at (919) 546-7585.
PJL/jo
(19994 )
Attachment
c: Mr. A. D. McKinney, TWRA (w/a)
Mr. S. W. Tedder, NCDEHNR (w/a) Lx
Sincerely,
B arry 4ey,
Manager - Civil Engineering
2,265
2,260
d 2,255
L 2,250
O
2,245
U)
2,240
2,235
9.
Walters Hourly Elevations
(January 1 - March 31, 1995)
ft
ft
2,230
01-Jan 06-Jan 11-Jan 16-Jan 21-Jan 26-Jan 31-Jan 05-Feb 10-Feb 15-Feb 20-Feb 25-Feb 02-Mar 07-Mar 12-Mar 17-Mar 22-Mar 27-Mar
Dates
Actual Elevation Minimum Elevation
Walters Hourly Elevations
(April 1 - June 30, 1995)
2,265
2,260
7 2,255
=� 2,250
2,245
U)
w 2,240
2,235
N
M
2,230 1
11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
01-Apr 06-Apr 11-Apr 16-Apr 21-Apr 26-Apr 01-May 06-May 11-May 16-May 21-May 26-May 31-May 05Jun 10Jun 15-Jun 20Jun 25-Jun 30-Jun
Dates
Actual Elevation Minimum Elevation
Walters Hourly Elevations
(July 1 - September 30, 1995)
2,265
2,260
d 2,255
2,250
LO
2,245
N
d
w 2,240
2,235
w
M
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01-Jul 06-Jul 11-Jul 16-Jul 21-Jul 26-Jul 31-Jul 05-Aug 10-Aug 15-Aug 20-Aug 25-Aug 30-Aug 04Sep 09Sep 14Sep 19-Sep 24Sep 29Sep
Dates
Actual Elevation Minimum Elevation
Walters Hourly Elevations
(October 1 - December 31, 1995)
2,265
2,260
7aj 2,255
L 2,250
O
2,245
VN
2,240
2,235
a
M
2,230 1 IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
01Oc1.95 06-0d-05 11-Od-95 16-Od-05 21-Od-05 260d-05 31-0d-95 05-Nov-95 10+3 05 15No 95 20-No 95 25-No 95 70-No 95 05-De 95 10-De 95 15-De 95 20.0e 95 25-Dec95 70-Dec-95
Dates
Actual Elevation Minimum Elevation
44D,
-7Z
FEDERAL ENERGY REGULATORY COMMISSION
ATLANTA REGIONAL OFFICE
Parkridge 85 North Building
3125 Presidential Parkway - Suite 300
Atlanta, Georgia 30340
MAY 2 7 199rv-
Project No. 432 - NC wJu�
Mr. Barry L. Arney, P.E.
Manager - Civil Engineering
Carolina Power & Light Company
Post Office Box 1551
Raleigh, North Carolina 27602
Dear Mr. Arney:
Mr. Terry W. West of the Atlanta Regional Office will conduct
an operation inspection of the Walters Project No. 432 on Thursday,
June 16, 1994. He will meet you or your representative at the dam
at 8 a.m. to begin the inspection. All project structures will be
inspected, and records for this project will be examined. During
the inspection, you may be requested to operate the spillway gates.
at the Walters project using normal and/or standby emergency power.' -
Please have a boat available to facilitate the inspection of the
upstream portions of the dam. An exit meeting will be held at the
end of the inspection to discuss findings and necessary followup
action.
A copy of the Project Compliance Summary from the Hydropower
License Compliance Tracking System accompanied our December 30,
1993, letter. This summary lists information describing the status
of actions to be taken by Carolina Power & Light Company (CP&L) to
comply with the requirements of the project license and Commission
Rules and Regulations. Following the inspection, the current
status of required actions will be reviewed with CP&L staff and any
questions they may have will be answered.
CP&L was furnished a letter dated March 2, 1994, stating each
project owner is responsible to ensure the project is in compliance
with Section 12.43 of the'Commission's Regulations requiring any
power or communication line or gas pipeline that is located over,
under, or in project waters not to obstruct navigation for
recreational or commercial purposes or otherwise endanger public
safety. Minimum clearances should be in accordance with the
National Electrical Safety Code. Please have available for review
during the inspection your inventory and appraisal of compliance of
all utility lines at the project. Mr. West will discuss the
assessment during the inspection and indicate follow p _acti_on..
required. r
r I
uL
ASHEVIL_.; �FF�CE
Mr. Barry L. Arney, P.E. -2-
Copies of this letter are being furnished to appropriate
Federal and State agencies. If agency representatives are
interested in accompanying Mr. West during the inspection, they are
requested to contact this office at (404) 452-2360. This contact
will be the basis of notification should the inspection schedule
require a last minute change.
Very truly yours,
gobert W Crisp, P.E.
ctor
M
Mr. Barry L. Arney, P.E. -3-
North Carolina Federal and State Agencies
Ms. Cherry Green
U. S. Department of the Interior
Fish and Wildlife Service
1875 Century Boulevard, Suite 324
Atlanta, GA 30345
Ms. L. K. (Mike) Gantt
U. S. Fish and Wildlife Service
Fish and Wildlife Enhancement
Post Office Box 33726
Raleigh, NC 27636-3726
Mr. Andreas Mager, Jr.
Acting Assistant Regional Director
Habitat Conservation Division
National Marine Fisheries Service
9450 Koger Boulevard
St. Petersburg, FL 33702
Director
Southeast Office
National Park Service
75 Spring Street, S. W.
Atlanta, GA 30303
Mr. Dick Jones
Forest Service, Division
of Engineering
1720 Peachtree Road, N. W.
Suite 800
Atlanta, GA 30367
Mr. John D. Wray, P.E.
Deputy Director
Division of Water Resources
NC Department of Environment,
Health, and Natural Resources
Post Office Box 27687
Raleigh, NC 27611-7687
Regional Director
Region IV
Environmental Protection Agency
345 Courtland Street, N. E.
Atlanta, GA 30308
Attn: Mr. Heinz Mueller
State of North Carolina
Department of Natural Resources
and Community Development
Environmental Management
and Recreation
Post Office Box 27687
Raleigh, NC 27611
NC Wildlife Resources Commission
Division of Boating and Inland Fisheries
512 North Salisbury Street
Raleigh, NC 27604-1188
Attn: Habitat Conservation Program
Mr. James Simons, Assistant Chief
Land Quality Section
Dept. of Environment, Health,
and Natural Resources
Post Office Box 27687
Raleigh, NC 27611
FEB 2 4 1995 1
FEDERAL ENERGY REGULATORY COMMISSION
WASHINGTON, D. C.20426
Project No. 432-013--North Carolina
Walters Hydroelectric Project
Carolina Power and Light Company
Mr. Barry L. Arney
Carolina Power and Light Company
P.O. Box 1551
411 Fayetteville Street Mall
Raleigh, Nc 27602 WATER QUALITY
Dear Mr. Arney : ,SECTION
This acknowledges receipt of your 1994 Annualy-Lake"4�evel
Elevations Report filed February 15, 1995 with the Commission.
The filing included a graph depicting the hourly lake elevations
from the effective date of your license (November.l, 1994)
through December 31, -1994.
FEB 28 1995
The filed annual report adequately fulfills the requirement
of license article 403 for the Walters Hydroelectric Project. If
you have any questions concerning this matter, please call
Mr. T.J. LoVullo at (202) 219-1168.
Si cerely, J
. Mark Robinson
rector,- Division of Project
Compliance and Administration
CC: Mr. Aubrey D. McKinney
Chief, Division of Environmental Services
Tennessee Wildlife Resources Agency
P.O. Box 40747
Nashville, TN 37204
..Mr. Steve W. Tedder
Chief, Water Quality Management
North Carolina Department of Environment 0
97
P.O. Box 27687 fp Raleigh, NC 27611-7687
MAR - 3
19Z
FEDERAL ENERGY REMMISSION
WA
OFFICIAL'BUSINESS
PENALTY FOR PRIVATE. USE, $100
Mr. Steve W. Tedder
Chief, Water Quality Management
North Carolina Department of Environment
P.O. Box 27687
Raleigh, NC 27611-7687
ill
:ilr ►'�:�:73`'-}�'tdf:q,+,++sF'S•f�4a+rcz:;°.53ec�.°9�ttsmx^'�i:!�aic4iiick§2`s;:Ybt n"r:°�K:ivP:s'�.k;•iav�•ia'�. zS,r.h: k'.•rurrxA�vn�� "yex �w.n Fcrrer .••.,;"",•
r
FEDERAL ENERGY RE AO Y `OMMISSION
WASHINGTO , �.C. Oil
i
OFFICIAL'BUSINESS
j PENALTY FOR PRIVATE. USE, S30p
I
i
1N�
Mr. Steve W. Tedder
Chief, Water Quality Management
North Carolina Department of Environment
P.O. Box 27687
Raleigh, NC 27611-7687
111
_ FEB 2 4 1995 � 1
FEDERAL ENERGY REGULATORY COMMISSION
WASHINGTON, D. C.20426 1
Project No. 432-013--North Carolina
Walters Hydroelectric Project
Carolina Power and Light Company
Mr. Barry L . Arney;s; re
Carolina Power and Light Company
P.O. Box 1551
411 Fayetteville Street Mall FEB �� i995
Raleigh, NC 27602 WATER QUALITY
Dear Mr. Arney : SECTION
This acknowledges receipt of your 1994 Annual-Lake`Level
Elevations Report filed February 15, 1995 with the Commission.
The filing included a graph depicting the hourly lake elevations
from the effective date of your license (November 1, 1994)
through December 31, 1994.
The filed annual report adequately fulfills the requirement
of license article 403 for the Walters Hydroelectric Project. If
you have any questions concerning this matter, please call
Mr. T.J. LoVullo at (202) 219-1168.
Si cerely,
Mark Robinson
*Director,-,D-ivision of Project
Compliance and Administration
CC: Mr. Aubrey D. McKinney
Chief, Division of Environmental Services
Tennessee Wildlife Resources Agency
P.O. Box 40747
Nasnvilie, TN 37204
Mr. Steve W. Tedder
Chief, Water Quality Management
North Carolina Department of Environment
P.O. Box 27687
Raleigh, NC 27611-7687
WALTERS H17DROELECTRIC PROJECT
`:iDERAL REGULATORY ENERGY COMMISSION
PR0j1 C T N0. 43.2
III STPIF,YM FLOW STUDY PLAN FOR THE
BYPASSED REACH AT TIME
WAL7'ERS 111.7""'R.01ELECTRIC PROJECT,
PIGEON RIVER, NORTH CAROLI-14A
Prepared For
Carolina Power and :.fight Company
Prepared By
RMC Environmental Services, Inc.
Im '
ENVIRONMENTAL
SERVICES
March 1992
WALTERS HYDROELECTRIC PROJECT
FEDERAL REGULATORY ENERGY COMMISSION
PROJECT NO. 432
INSTREAM FLOW STUDY PLAN FOR THE
BYPASSED REACH AT THE
WALTERS HYDROELECTRIC PROJECT,
PIGEON RIVER, NORTH CAROLINA
Prepared For
Carolina Power and Light Company
411 Fayetteville Street Mall
P. O. Box 1551
Raleigh, NC 27602
Prepared By
RMC Environmental Services, Inc.
Utility Consulting Division
Muddy Run Ecological Laboratory
1921 River Road, P. O. Box 10
Drumore, Pennsylvania 17518
March 1992
TABLE OF CONTENTS
Page
1.0 INTRODUCTION.................................................... 1
2.0 PROJECT DESCRIPTION ............................................. 4
3.0 CHARACTERISTICS OF BYPASSED REACH ............................ 6
3.1 Walters Dam to Hurricane Creek (Upper Segment) ........................ 6
3.2 Hurricane Creek to Groundhog Creek (Middle Segment) .................... 8
3.3 Groundhog Creek to Powerhouse (Lower Segment) ........................ 8
3.4 Fishery Resources ................................................ 9
4.0 DESCRIPTION OF THE INSTREAM FLOW INCREMENTAL METHODOLOGY. 11
5.0 SELECTION AND MEASUREMENT OF TEST FLOW RELEASES ............ 19
6.0 SELECTION OF TRANSECTS AND VERTICALS ......................... 22
7.0 SELECTION OF SPECIES, LIFE STAGES, AND HSI CURVES ............... 25
8.0 DEVELOPMENT OF POTENTIAL FISH HABITAT AND FLOW RELATIONSHIPS 28
8.1 Subreach Delineation (Step 1) ....................................... 29
8.2 Habitat Mapping (Step 2) ........................................... 29
8.3 Selection of Transects (Step 3)...................................... 30
8.4 Stream Morphometry and Microhabitat Measurements (Step 4) .............. 30
8.5 Implement PHABSIM (Step 5)...................................... 32
8.6 Evaluate Alternative Discharge Regimes (Step 6) ........................ 32
9.0 QA/QC............................................................ 37
10.0 ANTICIPATED STUDY SCHEDULE, REPORTS AND DELIVERABLES ....... 38
11.0 LITERATURE CITED .............................................. 40
Appendices
i
CPLStudy.Pln/F'mal
LIST OF TABLES
Table
Page
6-1 Substrate/cover codes provided by NCDWR for Walters Dam Instream Flow Study .. 24
7-1 Periodicity chart of critical life stages of target species in the Pigeon River
bypassed reach. Adults and Juveniles of target species (not shown)
occupy the stream throughout the year ............................... 27
8-1 Transects identified for PHABSIM measurements in the upper study segment
of the bypassed reach of the Pigeon River below Walters Dam.
Segment length is 4.0 mi (21, 120 ft) ............................... 34
8-2 Transects identified for PHABSIM measurements in the middle study
segment of the bypassed reach of the Pigeon River below Walters Dam.
Segment length is 3.1 mi (16,368 ft)................................ 35
8-3 Transects identified for PHABSIM measurements in the lower study
segment of the bypassed reach of the Pigeon River below Walters Dam.
Segment length is 4.9 mi (25,872 ft)................................ 36
10-1 Anticipated weekly schedule for IFIM study at Walters Hydroelectric Project,
Pigeon River, North Carolina ..................................... 39
LIST OF FIGURES
Figure
2-1 Walters Hydroelectric Project ................................... 5
3-1 Longitudinal profile of the bypassed reach of the Pigeon River between
Walters Dam and Walters Powerhouse .............................. 10
4-1 Example of an HSI curve for adult smallmouth bass ...................... 14
4-2 Example of how PHABSIM breaks transects (numbered) into cells ............ 15
4-3 Example of a WUA versus stream discharge (river flow) relationship ........... 16
4-4 Example of a habitat time series with a 12-hr time step .................... 17
4-5 Example of a habitat duration curve derived from PHABSIM analysis
for two flow schemes ........................................ 18
IE
MstudyMn/Final
1.0 INTRODUCTION
Carolina Power and Light Company (CP&L) operates the Walters Hydroelectric Project
(Federal Energy Regulatory Commission Project No. 432) on the Pigeon River in Western North
Carolina. The project and its environs are described in detail in Exhibit E (CP&L 1990a) of a
relicensing application before the Federal Energy Regulatory Commission (FERC). During the
pre -hearing consultation process of the Walters Plant relicensing, and in subsequent testimony
sponsored by the North Carolina resource agencies, one of the agencies' primary
recommendations was that instream flow in the 12-mile stretch of the Pigeon River between the
dam and the powerhouse --the "bypassed reach" --be provided. The agencies identified three
alternatives for consideration. These included: 1) divert Cataloochee Creek via a pipeline from
its mouth to a point immediately below the Walters dam; 2) release a minimum flow from the
lake equivalent to the September median flow; and 3) release from the lake that flow determined
from an agency -approved instream flow study. Neither of the latter two options was to be
initiated until the resource agencies were satisfied that the water quality had improved sufficiently
in the river and lake.to not impact the existing biological community in the bypassed reach.
Although these agencies indicated a preference for the Cataloochee Creek diversion, CP&L
believed that the high costs and uncertainties associated with the permitting, construction and
operation of this diversion made its feasibility questionable. CP&L thus indicated that it would
pursue the option to conduct an agency -approved instream flow study following improvement in
the water quality.
Subsequently, in October, 1991, the North Carolina resource agencies changed their position,
indicating that the instream flow study should be conducted as soon as possible. The primary
objective for this study was to establish relationships between aquatic habitat and stream flow in
the bypassed reach. CP&L agreed to conduct the study, as described in the study proposal.
ULStndy.Pla/Final
As a result, CP&L met with resource agencies during November 1991 to discuss initial study
requirements and logistics. Personnel from the North Carolina Department of Environmental
Management (NCDEM), the North Carolina Department of Water Resources (NCDWR), and
the North Carolina Wildlife Resources Commission (NCWRC) requested CP&L to develop a
plan for the instream flow study at the Walters Project using the Instream Flow Incremental
Methodology (IFIM). CP&L contracted RMC Environmental Services, Inc., Drumore,
Pennsylvania, in early January 1992 to develop a study plan for implementation in late March or
early April 1992.
As part of the scoping and consultation process, CP&L arranged a meeting between RMC,
NCDWR, NCWRC, and NCDEM personnel on February 3, 1992, in Asheville, NC to establish
protocols and discuss various components of the instream flow study plan, including test flows,
target species and life stages, logistical problems, safety concerns, etc. CP&L and RMC biologists
shared with the resource agencies observations on stream conditions from the tailwater of Walters
Powerhouse to Walters Dam as revealed by an aerial video of the bypassed reach and
photographs taken during January 28-29, 1992, while surveying the bypassed reach on foot.
Following this meeting, CP&L, RMC, NCDWR, and NCWRC biologists jointly surveyed the
stream on February 4-6, 1992 and characterized representative habitats in the bypassed reach,
established study sites and transect locations, and discussed site accessibility and safety concerns.
As a result of the above consultations a detailed draft Study Plan was prepared and
submitted to the agencies for comments. The agencies sent their comments to CP&L on March
13, 1992. The comments were discussed with the NCDWR and NCWRC biologists on March 17,
1992, in a meeting held in Raleigh, NC. This Study Plan provides the details of the agreed upon
instream flow study and a schedule of associated activities as discussed with resource agency
biologists. Sections 2.0 to 4.0 provide background on the Walters Hydroelectric Project and study
area used to design the instream flow study, and give an overview of the IFIM, a methodology
CPLStudy.P1WFina1 2
developed and recommended by the U. S. Fish and Wildlife Service (USFWS) for instream flow
studies. Sections 5.0 to 8.0 provide specific details of the Walters IFIM study.
CPLStudy.PWFinal 3
2.0 PROJECT DESCRIPTION
The Walters Hydroelectric Project is located on the Pigeon River in Haywood County, North
Carolina, and is surrounded by the Pisgah National Forest in North Carolina and the Cherokee
National Forest in Tennessee (Figure 2-1). The project is bordered on the north and east sides
by U. S. Interstate Highway 40 (I40). The powerhouse is situated at the North Carolina -
Tennessee border. The powerhouse has three generating units and a nameplate rated capacity of
108 megawatts at a discharge of approximately 1900 cfs at full pool elevation of 2,258 ft above
mean sea level (m.s.l.). The normal tailwater elevation is 1,397 ft m.s.l. The project is generally
operated to provide peaking power but occasionally is run at non peak times or continuously to
avoid spilling water from the dam.
Walters Lake, the project's storage impoundment, is located in North Carolina and has a
surface area of approximately 340 acres at full pool elevation. The lake was created in 1929 by
impounding the Pigeon River with a concrete arch dam. Located at Pigeon River mile (RM) 38,
the dam is 185 ft high, approximately 390 ft long in the river bed, and approximately 900 ft long
at the crest. A spillway is formed at the center of the dam and is equipped with 14 steel tainter
gates measuring 24 ft long and 10 ft high. Walters Lake is long and narrow, extending 5.2 mi
from the dam with a maximum depth of approximately 135 ft at full pool. The drainage area of
the Pigeon River at Walters Lake is 455 mi'. A conduit tunnel approximately 6.2 mi long delivers
water from Walters Lake to the powerhouse, bypassing approximately 12 mi of the Pigeon River
(hereafter referred to as the bypassed reach). In this Study Plan, locations within the bypassed
reach are identified as bypass mile (BM), proceeding from Walters Dam (BM 0.0) downstream to
the powerhouse (BM 12.0).
CPLStudy.Pln/Final 4
". Waterville Exit (Browns Bridge) _
"~ Power House
Cold Springs
Campground
m �
To
e
Big Creek
Campground l
m� Goyl
Hannon Den Exit
(Bypass Ford)
Diversion Tunneler
Walters
Great Smoky
Mountains National
Park
Pisgah National Forest
Walters Lak@ Ines Creek Exit
(Hepco Bridge)
Location
Carolina Power & Light Company Copyright 1991
Figure 2-1. Walters Hydroelectric Project.
A
3.0 CHARACTERISTICS OF BYPASSED REACH
The bypassed reach of the Pigeon River drains an area of approximately 44 mi. The overall
gradient from the dam to the powerhouse is approximately 55.0 ft/mi (Figure 3-1). However,
stream gradient in the upper 2.5 mi and the lowermost 4.75 mi is substantially steeper than the
river reach in between. The bypassed reach has three major tributaries: Hurricane Creek (BM
4.0), Cold Springs Creek (BM 5.0), and Mt. Sterling Creek (BM 9.7). The bypassed reach can be
divided into three segments based upon flow and habitat characteristics: 1) Walters Dam to
Hurricane Creek (BM 0.0-4.0), 2) Hurricane Creek to Groundhog Creek (BM 4.0-7.1), and 3)
Groundhog Creek to the powerhouse (BM 7.1-12.0). The lengths of segments 1, 2, and 3 are
approximately 4.0, 3.1, and 4.9 mi, respectively. Little seepage flow (approximately 1 cfs) occurs
from Walters Dam. Portions of the original river channel have been altered since impoundment
by some riparian vegetation encroachment and backfill due to construction of I-40.
The descriptions of flow, gradient, and habitat characteristics for each study segment provided
below serve to further characterize the bypassed reach, and will provide the basis for modelling
stream discharge versus available potential habitat for selected fish species and life stages using
the Physical Habitat Simulation (PHABSIM) component of the IFIM. Sources of information for
study segment descriptions included U. S. Geological Survey (USGS) topographic maps (1:24,000
scale), aerial videography, and ground level examination of the bypassed reach during site visits
conducted in late January and early February 1992 by RMC, CP&L, NCDWR, and NCWRC
personnel.
3.1 Walters Dam to Hurricane Creek (Upper Segment)
This segment encompasses approximately 4.0 mi of channel between Walters Dam and
Hurricane Creek and has an overall gradient of 45 ft/mi (Figure 3-1). However, the first 1.5 mi
below the dam is considerably steeper (gradient approximately 67 ft/mi) and passes through a
narrow, extremely rugged gorge. Because of the steep, jagged terrain, access to the upper
CPLsludy.P1WFina1
segment is limited and involves arduous, potentially dangerous hiking in the first 3.0 mi below the
dam. Access to the downstream end of the upper segment is facilitated by somewhat flatter
terrain and the presence of a logging trail (U.S. Forest Service road) that borders the river
between a ford at Harmon Den to just upstream of Hurricane Creek.
Rock debris from construction of Walters Dam is strewn about the first 0.5 mi of channel
below the impoundment. Various channel forms comprise the remaining upper segment,
including short, relatively shallow pools near the dam, and larger, deeper pools near the
Hurricane Creek confluence. Substrate in the pools varies from large boulders and bedrock slabs
to smaller cobbles interspersed with small patches of gravel and sand. Gravel and sand are
markedly absent in the first 2.0 mi below Walters Dam, which is swept clean of finer substrates by
episodic releases from the reservoir and natural runoff. Filamentous algal mats coat portions of
the substrate throughout the lower 2.0 mi of the upper segment.
Two distinctive types of riffle/run habitat occur between pools in the upper segment. One
type is characterized by water flowing over and around a series of bedrock outcrops that cross the
stream channel at oblique angles. Most of these oblique bedrock outcrops occur in the first 2.5
mi of channel below Walters Dam, but an outcrop of this type was also found at a potential study
site further downstream within the upper segment. A second riffle/run type is characterized by a
mix of large rocks, boulders, and cobbles interspersed with vegetated hummocks often colonized
by moderate to dense stands of saplings.
Discharge in the upper segment during January -February 1992 site visits was estimated
between <1.0 cfs near the reservoir (dam seepage) and 9 cfs just upstream of Hurricane Creek.
crr stuay.rWai=I 7
3.2 Hurricane Creek to Groundhog Creek (Middle Segment)
This segment, extending from 4.0 mi to 7.1 mi below Walters Dam, consists of a flatter river
channel (gradient of 23 ft/mi) that receives inflow from several tributaries including Hurricane
Creek, Cold Springs Creek, and several lesser streams that drain the adjacent mountainsides
(Figure 3-1). Access to this study segment is provided by the river ford and logging trail at
Harmon Den, by land adjacent to a North Carolina Department of Transportation (NCDOT)
property known locally as the "Cotton Patch", and by careful descent of the steep I-40
embankment bordering the river to the east. The Harmon Den area affords the only easy access
to the bypassed reach for public use.
Smaller shallow pools with depths to 4 ft, and larger deep pools with measured depths to 10
ft, are interspersed with faster riffles and runs throughout the middle segment. Most pools
(shallow and deep) contain a diverse mixture of substrate types, from sand through large
boulders. Low to moderate gradient riffles and runs separate the pools; some contain grassy
hummocks and usually are of lower gradient than other, moderately steep riffles and runs flowing
over and around larger cobbles and boulders. Patches of Podostemum ceratophyllum are locally
abundant on substrates in this segment.
Contributions to the middle segment of approximately 20 cfs each from Hurricane Creek and
Cold Springs Creek, plus lesser amounts from smaller tributaries, increased base flow in the
middle study segment during the January -February 1992 site visits.
33 Groundhog Creek to Powerhouse (Lower Segment)
The 4.9 mi of bypassed river between Groundhog Creek and the Walters Powerhouse
comprises the lower study segment. Groundhog Creek enters the bypassed reach at BM 7.1, a
point where the overall stream gradient steepens considerably to nearly 80 ft/mi (Figure 3-1).
Access to most of the lower segment is extremely difficult and must be accomplished by
ULStudyTtwFinal 8
descending the steep, superficially unstable I40 embankment. A side road at an NCDOT salt -
storage shed somewhat facilitates access to the lower segment.
The narrow, high gradient channel exhibits an array of habitat features characterized by
numerous ledges, giant boulders, sudden drops in elevation, and sharp, angular rock debris spilled
into the gorge by construction of I-40. Due to the complex channel structure, specific habitat
types were difficult to characterize, but several types were delineated by RMC, CP&L, and
resource agency personnel based on aerial videography and ground level surveys: 1) shallow
pools, 2) deep pools, 3) deep runs, 4) boulder runs, S) low gradient riffles, and 6) high gradient
riffles with plunge pools and cascades. Due to the steep channel gradient, episodic spates have
swept the lower segment free of gravel and sand, leaving considerable interstitial space between
larger cobbles and boulders. P. ceratophyllum occurs on substrates in this segment.
One major tributary (Mt. Sterling Creek) and several small mountain rills (e.g., Counterfeit
Branch and Runyon Creek) contribute additional flow to the lower segment. Discharge in the
lower segment during the February 1992 site visit was estimated at SO cfs.
3.4 Fishery Resources
In the bypassed reach, the fish community is represented by cool to warmwater species such
as smallmouth bass, redbreast sunfish, rock bass, bluegill, green sunfish, largemouth bass, carp,
central stoneroller, whitetail shiner, northern hog sucker, greenside darter, .and mottled sculpin
(CP&L 1990a). The bypassed reach currently supports a small but high -quality fishery for
smallmouth bass and redbreast sunfish as characterized by the numbers, size distribution, and
body condition of both species. The presence of this fishery has existed for at least 27 years
based on previous fishery surveys by NCWRC biologists (Messer 1964; Bonner 1983). Currently,
angling pressure in the bypassed reach is light (CP&L 1990). Reasonable access for anglers to
most of the bypassed reach is limited.
ULStudy.Pln/Final
1
I
-- ----- -- - - - - - ... --- - --- ----- - - ev- --
--2200 ELOWER SEGF9ENT. - - . E --� -__ UPPER_5EGMENT..
_ MIDDLE SEGMENT
- -- - - ---. --- - - ----- -_ Walters -
----- - -- - - -- - --- - -- - - - - -- - --- - ------- - -- Dam
- - " -- "---Nurrlcane Ci-ee7c --- ----
------------
--- - --- - - ---..-.-Cold Springs Creek- - ---- -- Elev. -2060----
- --- -- ---- - -
-2000 -- - - Groundhog Creek - - -- ---- - - ------------- ----
w1900 - - ---- --- --- ---- - - - - - - - - - - --- -
F -- --- -- - - -- - - - --- -- - ----Cotton Patch -- - - --- -- -- -- --- — --- ---
-- -- - - - NC" DOT
-� 1800 --- Salt Shack ------ -- - - — -
_w ..- ---- ------ ----------- ---
- - -- - ---- -- - — --- - - SCALE- 40 -- -
-1700 -- -- - - -- - - ----
____ 1 Mile
--1600 - - - - ---- - -
k
12.0 11.0 10.0 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0
BYPASS MILE
Figure 3-1. Longitudinal profile of the bypassed reach of the Pigeon River between Walters Dam and Walters Powerhouse.
4.0 DESCRIPTION OF THE INSTREAM FLOW INCREMENTAL METHODOLOGY
To better understand the Pigeon River IFIM Study Plan, a brief description of the
methodology extracted from Bovee (1982) is presented. The IFIM uses hydraulic simulation
techniques (IFG4 or Water Surface Profile) to predict depth and velocity distributions within a
stream reach over a range of flows. IFG4 is the technique most frequently used, but NCDWR
has indicated that it often uses the Water Surface Profile (WSP) procedure for pools. From
simulations of stream hydraulic characteristics, and knowledge of microhabitat preferences of a
target aquatic organism, the amount of potential available habitat provided by different flow
regimes can be estimated. The measure of potential physical habitat availability is termed
Weighted Useable Area (WUA). The Physical Habitat Simulation (PHABSIM) system of
computer models within IFIM produces the relationship between potential habitat and stream
flow. However, the method does not relate flow with fish standing crop (biomass).
Suitability of physical habitat conditions are determined by knowledge of macrohabitat,
mesohabitat, and microhabitat preferences of a target species life stage. Macrohabitat refers to
such features of the environment as water quality, thermal regimes, status of food resources, etc.
Habitat features related to local channel morphology such as high gradient riffles or shallow pools
are considered mesohabitats. Microhabitat features refer to the set of environmental conditions
in the immediate vicinity of an organism. Microhabitat variables considered in an IFIM analysis
usually include water depth, current velocity, and an index of either substrate or a cover -substrate
combination.
Microhabitat preferences of species and life stages are expressed in the form of habitat
suitability index (HSI) curves in which the most suitable range of a habitat variable is assigned a
weighting factor of one, and the least suitable ranges are assigned weighting factors near zero.
An example of an HSI curve is presented in Figure 4-1.
ULstudy.PWFinal 11
Major components of PHABSIM include computer programs which simulate potential
physical habitat as a function of stream flow and transform the I-'G4 or WSP hydraulic
simulations into a measure of potential WUA. PHABSIM divides the surface of a stream reach
into rectangular cells which are centered on transects. Transects are located to sample
representative mesohabitat types, such as riffles, runs, or pools. Discrete measurements of depth,
velocity, and substrate are taken at the same locations, called verticals, along a transect at
different flows. Lengths of cells may be represented as one-half the distance between adjacent
upstream and downstream transects, or by the percentage of a larger reach of stream which is
subjectively determined to be represented by a given transect. The latter technique,
recommended by the USFWS, is termed habitat mapping (Morhardt et al. 1983). Figure 4-2
depicts how PHABSIM breaks transects into cells.
The IFG4 or WSP hydraulic simulation techniques are used to estimate depths and velocities
within each cell as a function of stream discharge. The simulation output is coupled with
substrate data, length of stream represented by each transect, and HSI curves for a target
organism, for input into other computer programs (HABTAT and HABTAV) which compute the
amount of potential WUA available over the flow range of interest. The WUA index is based on
the composite suitability of the three principal habitat variables (depth, velocity, and substrate),
derived for each stream reach as follows:
where: G, = t (Vi) x fd (Di) x f (Si)
and
WUA=E CiAi
QVi) = suitability weighing factor for the velocity of cell i
fd(Di) = suitability weighing factor for the depth in cell i
QSi) = suitability weighing factor for the substrate type in cell i
CPLstadyYWFinal 12
n = the number of cells --
A; = the area of cell i
From the basic relationship of stream discharge versus WUA (Figure 4-3) several other
relationships can be constructed. For the Walters study the primary interest is to establish
relationships between potential fish habitat and flow. Other types of analysis include construction
of a habitat time series (HTS, Figure 4-4). The time step for HTS analysis can range among
hourly, daily, monthly, or seasonally, depending on study objectives and availability of stream
discharge data. Results of HTS analysis can be compared among alternative flow regimes using a
habitat duration curve (Figure 4-5). The resultant analysis of potential habitat availability
(WUA) is used along with other relevant biological factors to evaluate the effects of alternative
flow regimes on potential fish habitat.
CPLstudy.PwFinat 13
SMALLMOl'U'"TH BASS - LT
is L OCXY HSI`
Y � .�, L,i'
r
;. _......... .................. :... ......... .................. :...._.......................
........ .........................
I
�. .............. .............. ................ :................
j�—
.P 1;.4 i_............ ............................................. ................_............ ....... s
i A
�J. s --- .. ....... ............. ............. S
VELOCITY (fps)
Figure 4-1 Example of an HSI curve for adult smallmouth bass.
a WI * II
Qi= WI#dim VI
OW
Figure 4-2 Example of how PHABSIM breaks transects (numbered) into cells.
15
40
d
0
30
0
F--
0
0
0
o
r-+
20
x
N
4-
d
3
10
50 75 100 150 250 350 450 650 700
RIVER FLOW (cfs)
Figure 4-3 Example of a WUA versus stream discharge (river flow) relationship.
'elf
20
a
y�
V >
10
Peak Flow Scheme A
------- Peak Flow Scheme D
0 I I I I 1 1 I I 1 I 1 I 1 1 1
0 12 24 12 24 12 24 12 24 12. 24 12 24 12 24
I S I M I T I W I TH I F I S I
Figure 4-4 Example of a habitat time series with a 12-hr time step.
8
15
14
13
12
11
10
Q -
9
6
7
6
0.1 1 10 30 50 70 90 99.99
PERCENT OF TIME EQUALLED OR EXCEEDED
Figure 4-5 Example of a habitat duration -curve derived from PHABSIM analysis for two flow schemes.
5.0 SELECTION AND MEASUREMENT OF TEST FLOW RELEASES
During the study scoping phase, CP&L and resource agencies decided to measure stream
habitat characteristics at zero release and three test release rates from Walters Dam: 40, 175, and
300 cfs, with the understanding that only water surface elevations and stream widths could safely
be measured at the highest release, and possibly at the 175 cfs release in some cases. These test
flows were chosen to permit extrapolation of velocity distributions and stage versus discharge
relationships up to approximately the median Pigeon River flow. However, as indicated in
Section 1.0, the primary interest for the study is the establishment of relationships between
potential fish habitat and flow.
The IFG4 hydraulic simulation requires a minimum of one set of velocity distribution data
for each transect, usually measured at the highest level of discharge feasible. However, more
accurate extrapolations of study output throughout the chosen range of flow alternatives may be
obtained by measuring additional sets of velocity data. Since the present Study Plan calls for a
set of velocity data at zero release and 40 cfs which will be sufficient to accurately model low
flows, selection of an appropriate high flow is important. After viewing stream conditions in the
field, it appears that at a 175 cfs release from the. Walters Dam, velocity measurements may be
unsafe to take at many of the transects in the steep lower study segment; a total discharge of
approximately 225 cfs (base flow plus discharge from Walters Dam) could be expected.
Therefore, a release of 130 cfs was agreed upon by all parties to replace 175 cfs to increase the
chances of obtaining velocity distributions in the lower study segment. This would provide
velocity data at stream flow of approximately 180 cfs.
The use of the WSP hydraulic simulation allows an investigator to predict water surface
elevations up to ±250% of the measured flow. These predicted water surface elevations are
input into the IFG4 model to predict velocities. These procedures allow a flow range of 52 to
325 cfs to be modeled from measurements taken at 130 cfs. For flow measurements at 40 cfs,
crrscnay.rla/Finat 19
hydraulic simulation will allow predictions over a range of flow of 16 to 100 cfs. The ability to
predict velocities over these overlapping flows will strengthen the predictions of hydraulic
simulation for higher flows as well. This Study Plan envisions the use of both WSP (as
recommended by NCDWR) and IFG4 hydraulic models. The use of IFG4 permits increased
predictive range over the WSP model, and is most appropriate for modelling complex channels
such as most of the bypassed reach. Thus, extrapolation for higher flow alternatives (e.g. median
Pigeon River flow) will not be affected by this proposed change in flow selection for safety
reasons.
Discharges of 40, 130, and 300 cfs will be obtained through tainter gate manipulation. For
the purposes of flow calibration, the basic orifice equation was used (Q = CA V2_FH_ where Q =
discharge in cfs; C= discharge coefficient, A = area of orifice opening in ft'; H = head to the
center of orifice in ft; and g = acceleration due to gravity). A lake elevation of 2253 m.s.l. (5 ft
on the tainter gate) is being considered for the study. Gate openings will be calculated using the
orifice equation. Physical markings are planned to be made on the tainter gate - side seals to
ensure the actual gate openings will be consistent with the calculated opening.
A calibration study to verify flow releases from Walters Dam was envisioned during the
scoping meeting, however, new information indicates that a separate calibration study will not be
necessary for two reasons. First, CP&L engineers have indicated (as stated above) that accurate
delivery of all target discharges can be achieved through tainter gate manipulation, and will have
calculated the gate heights and reservoir pool elevation needed to provide target flows prior to
initiation of the study. Second, because field data requirements for the IFG4 hydraulic simulation
include accurate measurements of true discharge at each transect for each test flow (which will
include tributary inputs and prevailing base -flow in each study segment) it will be possible to
precisely estimate the actual discharge from Walters Dam at each test release, as described below.
M-StuayAn/Finel 20
Prior to initiation of a given test release from Walters Dam, flow contributions from each
major tributary draining into the bypassed reach (Hurricane Creek, Cold Springs Creek, and Mt.
Sterling Creek) will be measured and staff gauges will be placed at each tributary and in the
bypassed reach near groups of transects to monitor flow fluctuations during the study. Staff
gauges will be checked regularly while measurements on transects are recorded. Base -level
discharge at appropriate locations in the bypassed reach near actual study sites will be measured
as well.
Prevailing base flow will be measured at an ideal location (Harmon Den ford) prior to any
release from the dam. A given test flow will then be released, and after a steady state has been
reached, discharge at the same location will be re -measured. Subtraction of the base flow from
this second flow measurement will estimate actual discharge from the dam. Then, given a set of
accurate base flow estimates for the three study segments, and steady state conditions of tributary
inflows and Walters Dam releases, accurate measurement of reservoir release taken at Harmon
Den will be used to verify (or estimate if necessary) total discharge at study sites for any given
test flow.
CFLsmay.PWFinaI 21
6.0 SELECTION OF TRANSECTS AND VERTICALS
In each of the three study segments described in Section 3.0, stream cross -sections (transects)
were selected with the concurrence of resource agency biologists to represent identifiable
mesohabitat types. Two permanent benchmarks set on opposite banks, called head and tail pins,
define a transect. If necessary, separate benchmarks will be established near transects to identify
head and tail pin locations. Exact transect alignment and placement -of head and tail pins will be
determined by balancing the water surface elevation across each transect during survey work.
Where possible head and tail pins will consist of permanent marks on embedded boulders along
the transect line. Two transects each were usually selected to represent shallow and deep pools,
while three transects were often selected to represent complex riffles and runs.
Aerial videography was selected as the most feasible method of identifying and ascribing
lengths to mesohabitat types in each study segment. Therefore, up to three transects were often
selected to represent multiple aspects of mesohabitat types which field investigators determined
could be delineated with confidence from the air. More thorough descriptions of the transects
selected in each study segment appear in Section 8.0 (Development of Stream Habitat Models).
Reproductions of photographs of individual transects are located in Appendix I. Since many
photographs were of poor quality, new photographs will be taken when transect locations are
finalized and surveyed. Color photographs of each transect will be made available to the
agencies.
The exact number and spacing of the verticals on each transect will depend upon breaks in
hydraulic or other habitat features such as substrate, velocity, depth, and cover. Thus, the actual
placement of verticals on each transect will occur in the field at zero discharge from Walters Dam
(i.e., base flow in the bypassed reach) to enhance substrate classification. However, in the upper
study reach the placement of transects and selection of verticals will occur at a flow release of 40
cfs from the Walters Dam. All parties (personnel from resource agencies, CP&L, and RMC) will
cPLsmdy.P1wFina1 22
be involved in the selection process. Verticals will be placed so that no more than 10% of total
discharge passes through any cell defined by adjacent verticals.
Substrate and cover at each vertical on the transect will be rated to represent proximal
habitat characteristics. A list of numerical codes (Table 6-1) supplied by NCDWR will be used to
describe substrate and cover.
Each vertical will be identified by the measured distance from the headpin determined by
standard surveying techniques. Stream bed elevation at each vertical, relative to a standardized
headpin elevation of 100 ft, will also be determined. A professional surveying firm, Hutchinson -
Biggs Associates, Asheville, NC will perform the surveys needed to precisely establish the position
of transects, headpin elevations, transect widths, distance to verticals, and stream bed elevations.
CPLStudy.Pln/Final 23
Table 6-1. Substratea/cover codes provided by NCDWR for Walters Dam Instream Flow Study.
1 No cover and terrestrial vegetation
2 No cover and sand
3 No cover and gravel
4 No cover and cobble
5 No cover and small embedded boulder
6 No cover and embedded boulder, or angled bedrock
7 No cover, and mud, or flat bedrock
8 Overhead vegetation and terrestrial vegetation, sand, mud, or flat bedrock
9 Overhead vegetation and gravel
10 Overhead vegetation and cobble
11 Overhead vegetation and small boulder, boulder, or angled bedrock
12 Instream cover and sand, gravel, or cobble
13 Instream cover and small boulder, boulder, or bedrock
14 Proximal' instream cover and sand, gravel, or cobble
15 Proximal instream cover and small boulder, boulder, or bedrock
a = Wentworth scale to be used for substrate
b = Overhead vegetation within 3 ft of surface
° = Proximal cover assigned to represent call conditions within 4 ft upstream and downstream
CPIScudy.Pln/FkW 24
7.0 SELECTION OF SPECIES, LIFE STAGES, AND HSI CURVES
During the initial scoping meeting, CP&L, NCDWR, and NCWRC biologists selected
smallmouth bass, redbreast sunfish, and whitetail shiner as target species for the instream flow
study. These three species were chosen for study based on their importance in the fish
community, and NCWRC management objectives which are focused on a wadeable smallmouth
bass fishery. Spawning, fry, juvenile, and adult life stages were selected for study.
Because the occurrence of different life stages of the target species is seasonal and may
overlap, flow assessments must consider their periodicity of occurrence. Thus, a brief literature
survey was undertaken to determine seasonal occurrence, spawning times, spawning temperature,
growth period, etc. of each target species (Carlander 1969, 1977). The periodicity (two week
intervals) of these life stage functions is summarized in Table 7-1.
An integral component of the PHABSIM model for calculating WUA is the use of
appropriate HSI curves for depth, velocity, substrate, and cover for each species and life stage.
Because the development of site -specific HSI curves can be prohibitively expensive, it is common
practice to use literature based HSI curves, such as those on file with the U. S. Fish and Wildlife
Service or state resource agencies. However, HSI curves are not universally applicable to all
situations and may require modification at a particular study area. When HSI curves from off -
site are used, they should be from streams as similar to the study area as possible (Bovee 1982).
The selection of the appropriate HSI curves for an IFIM study is perhaps the most important
task during project scoping and study plan preparation. Therefore, RMC, CP&L, NCDWR and
NCWRC personnel met in Raleigh, NC on March 17, 1992, and discussed the HSI curves
submitted in the draft Study Plan. All parties reviewed each of the curves and agreed that the
HSI curves given in Appendix II Figures 1 to 24 and Tables 1 to 6 will be appropriate in
developing the relationships between the potential fish habitat and flow for the Walters Dam
IFIM Study. The literature sources used to derive these HSI curves are also shown. Other
CPLStudy.P1nXi=1 25
relevant references are shown in the Literature Cited Section 11.0. HSI curves for common
shiner are used as a surrogate for the whitetail shiner; no HSI curves for the whitetail shiner
could be located in the literature or in the USFWS files.
CPLStudy.PWFina1 26
Table 7-1 Periodicity chart of critical life stages of target species in the Pigeon River bypassed reach. Adults and juveniles of target
species (not shown) occupy the stream throughout the year.
SPAWNING
Smallmouth Bass
Redbreast Sunfish
Whitetail Shiner
N
FRY
Smallmouth Bass
Redbreast Sunfish
Whitetail Shiner
8.0 DEVELOPMENT OF POTENTIAL FISH HABITAT AND FLOW RELATIONSHIPS
The objective of the PHABSIM component of the IFIM is the development of a relationship
between stream discharge and potential habitat availability (WUA) which becomes the primary
tool for evaluating effects of specific discharge rates or alternative flow regimes on habitat
availability. Construction and use of such a tool specific to the Pigeon River bypassed reach is
the focus of this section of the Study Plan. Many of the steps involved were referred to in the
general description of the IFIM (Section 4.0). Here, the available details of the process specific
to the Walters Hydroelectric Project instream flow study are set forth below.
There are six basic steps in the development of relationships of WUA versus discharges:
1) delineate subreaches based on flow regime and channel morphology, and determine the
length of each subreach;
2) identify mesohabitat types (e.g., riffles and pools) in each subreach and measure the
percentage of total subreach length comprised of each habitat type;
3) establish transects within each mesohabitat type to define locations where microhabitat
variables will be measured, and specify the amount of stream channel represented by each
transect as 1/Ni times the percent of subreach length comprised of mesohabitat type i, where
Ni is the total number of transects representing mesohabitat i;
4) measure the suite of microhabitat variables (depth, velocity, substrate, and cover) and stream
morphometric data (width, discharge, water surface elevations) appropriate to each
discharge rate within the flow range of interest for input into IFG4 or WSP hydraulic
simulation models; WSP will be used only to simulate water surface elevations in pools
which will be used as input into IFG4 for velocity predictions,
5) use the HABTAV component of PHABSIM to integrate hydraulic simulations with habitat
suitability criteria (HSI curves) for target organisms and derive the WUA versus discharge
relationships for each subreach,
ULStudy.PlwFinal 28
6) develop WUA and flow relationships for the entire bypassed reach.
Available data specific to each step are described below, as are the plans to obtain any
missing components needed to complete the study.
8.1 Subreach Delineation (Step 1)
RMC, CP&L, and resource agency personnel agreed to divide the Pigeon River bypassed
reach into three subreaches based on tributary inflow, channel morphology, and stream gradient,
as discussed in Section 3.0. Using USGS 1:24,000-scale topographic maps, the length of the
upper study segment between Walters Dam and Hurricane Creek was estimated at 4.0 mi or
21,120 ft. The middle segment from Hurricane Creek downstream to Groundhog Creek was
estimated at 3.1 mi or 16,368 ft, leaving 4.9 mi or 25,872 ft as the length of the lower segment
between Groundhog Creek and the Walters Powerhouse.
8.2 Habitat Mapping (Step 2)
Morhardt et al. (1983) described the habitat mapping method by which PHABSIM assigns cell
lengths in the calculation of WUA based on percentage representation of mesohabitat types in a
study reach rather than a measured distance between adjacent transects. In this process a study
segment is further subdivided into discrete mesohabitat types. Usually, three or more
mesohabitat types are discernible (e.g., riffles, runs, pools, or further subdivisions such as shallow
and deep pools, low and high gradient riffles, etc.) and the total length of the study segment
comprised of each type is measured or estimated by subsampling. For the Walters instream flow
study, RMC, CP&L, NCDWR, and NCWRC biologists defined mesohabitat types within the
upper, middle, and lower study segments using aerial videography and ground surveys.
Mesohabitat types identified in each study segment are listed in Table 8-1. RMC will measure
reach lengths for each type from the aerial videograph of the bypassed reach provided by CP&L,
using an elapsed time indicator and an assumed constant rate of travel to estimate distances over
the ground. North Carolina resource agencies will also independently estimate mesohabitat
CPLStudy.PIWFina1 29
lengths. Agreement on mesohabitat representation in the bypassed reach among the resource
agencies, CP&L and RMC should be reached prior to data analysis. The verified distances will
then be used in the modelling process. Additionally, crews will perform ground truthing of
distances and habitat types (e.g. pool types), if sufficient time is available after the field data
collection of physical parameters has been completed. Ground truthing will be done by
accurately measuring a known area and recording the habitat features (pools, riffles, rams, etc.).
These will be used to supplement the interpretation of the, videograph.
83 Selection of Transects (Step 3)
In addition to listing mesohabitat types defined in each study segment, Tables 8-1 to 8-3
identify the transects selected to represent each type. Channel lengths represented by each
transect will be provided based upon results of the videograph analysis in Step 2. Tables 8-1 to 8-
3 will be amended to include the habitat mapping results prior to data analysis. Photographs of
each transect are provided in Appendix I.
8.4 Stream Morphometry and Microhabitat Measurements (Step 4)
Prior to the initiation of releases from the Walters Dam andconditional upon approval of the
Study Plan by NCDEHNR personnel, each transect in the middle and lower study segments will
be permanently marked and' surveyed at a condition of prevailing base flow, which will be
measured at a location appropriate for each transect. Transects in' the upper segment will be
marked and surveyed at a 40 cfs release from Walters Dam. For ease in surveying, a permanent
head pin will be established for each transect on the stream bank bordered by I-40 to minimize
stream crossings with survey equipment. A tailpin on the opposite bank will be permanently
marked to define the width of the transect. Surveyors will set pins far, enough apart to be outside
'vetted perimeter of an approximately 800 cfs discharge, which is slightly greater than the
Elevatnnual flow (50% exceedance flow) into Walters Lake, or 700 cfs (CP&L 1990b).
�Adistances along the .transect line outside the transect pins ,will be measured several
CPLS1udy.p \
�� 30
feet up the bank to allow hydraulic modelling of higher flows. Head and tailpins will be
established by points that will not move in any direction during the course of the study, such as
surveyor marks on large embedded boulders.
Headpin elevations will be set at 100.0 ft. Verticals will then be assigned, stream bed
elevations surveyed, and substrates classified to produce a cross -sectional profile of stream bed
elevations and substrate characteristics for each transect, as discussed in Section 6.0. Distances
between headpins and verticals will be determined by Electronic Distance Meter (EDM), and will
be cross-referenced to a measuring tape strung between working pins set on the transect line
beyond the headpins. Use of a measuring tape will facilitate relocation of verticals when velocity
measurements are obtained at higher discharges. During the base flow survey, left and right bank
water surface elevations and velocities within cells defined by verticals will be measured to define
the cross -sectional depth and velocity profile for each transect at the prevailing ambient discharge
(zero release from Walters Dam). A minimum of two water surface elevations, safety conditions
prevailing, will be measured at each transect at each flow.
All depth and velocity measurements will follow the procedures outlined in Bovee (1982).
Velocity measurements will be taken at 0.6 x depth in shallow water (<2.5 ft) and at 0.2 and 0.8 x
depth in deeper water. Velocities at each vertical will be measured with a calibrated Swoffer
Current Meter. Depths associated with field velocity determinations will be measured with a
calibrated staff rod or metered cable. Water surface elevations and distance to the waters edge
will be measured at each transect and at each test release flow. These may be measured at more
than one location along a transect. Depths across transects at various flows will be calculated
from differences between water surface and stream bed elevations.
For the IFG4 hydraulic simulation, each transect is considered independent of others, which
reduces the level of survey effort needed to document transect placement. However, to
implement the WSP option for pool transects, as desired by NCDWR, it will be necessary to
CPLStudy.PIWFinal 31
measure a stream bed profile at the hydraulic control downstream, and determine distances and
headpin elevation differences between the hydraulic control and all transects set within the same
pool. Thus, use of WSP for pool transects will require surveyors to expend more effort than is
needed for IFG4. Ultimately, both IFG4 and WSP hydraulic simulations will be combined to
produce a complete hydraulic simulation of the bypassed reach. The use of MANSQ as
suggested by the resource agencies will also be considered.
After completion of the prevailing base flow survey, a known volume from a tainter gate at
Walters Dam will be released. At present it is assumed that velocity profiles can safely be
obtained at a 40 and 130 cfs release, but not at a 300 cfs release. Hence, at test flow releases of
40 and 130 cfs, water surface elevations and velocity profiles will be measured for each transect,
but at a 300 cfs release, only water surface elevations will be measured.
8.5 Implement PHABSIM (Step 5)
Once all field data are collected and verified, the PHABSIM library of computer programs
will be used to develop a potential WUA versus discharge relationship for each target species/life
stage in each study segment over the flow range selected for field measurements. Any
extrapolation to bypassed reach WUA at discharge rates beyond the highest measured flow will
be made only after consideration of model accuracy, channel configuration, and other factors
affecting extrapolation limits, as recommended in Bovee (1982).
8.6 Evaluate Alternative Discharge Regimes (Step 6)
As stated earlier the primary purpose of this study is to establish relationships between
potential habitat and flow for each species/life stage. Effects of the addition of 40 cfs to the
bypassed reach on potential habitat availability for target species/life stages will be evaluated in
the following manner. Using reach -specific WUA versus discharge relationships, and the
prevailing discharge in each study segment, total WUA in the bypassed reach for each target
organism under a condition of zero discharge from Walters Dam will be calculated. Then, total
CPLStu4.PWFina1 32
WUA for the bypassed reach will be recomputed after adding 40 and 130, cfs releases to the
prevailing discharge to ascertain the effect of these specific releases on target species/life stages
WUA.
To further evaluate the effects of specific flow releases on habitat availability, a habitat time
series analysis will be performed. For this analysis historic flow records from the USGS gaging
station on the Pigeon River upstream of Walters Lake near Fines Creek (gage #03459500) will
be combined with USGS gaging records for Cataloochee Creek (gage #03460000) and estimated
inputs from ungaged tributaries (e.g., Hurricane Creek, Cold Springs Creek, and Mt. Sterling
Creek) to define the baseline hydrograph and monthly flow exceedance curve for each study
segment. Depending on the relative amounts of flow from different sources and the shape of
WUA versus discharge relationships, it may be possible to simplify the analysis by ignoring
contributions from small, ungaged tributaries.
ULstudy.PlwFinal 33
Table 8-1. Transects identified for PHABSIM measurements "in the upper study segment of
the bypassed reach of the Pigeon River below Walters Dam. Segment length is 4.0
mi (21,120 ft).
Habitat Transect Amount of habitat Length represented
type number within Isegment(ft) by each transect(ft)
Deep pool
U-1
U-2
Shallow pool
U-3
U-4
Ledged run
U-5
U-6
U-7
U-8
Riffle/run
complex U-9
U-10
U-11
WILL BE PROVIDED PRIOR TO DATA ANALYSIS
CPLStudy.FhVFinal 34
Table 8-2. Transects identified for PHABSIM measurements in the middle study segment of
the bypassed reach of the Pigeon River below Walters Dam. Segment length is 3.1
mi (16,368 ft).
Habitat Transect Amount of habitat Length represented
type number within segment(ft) by each transect(ft)
Deep pool M-1
M-2
Shallow pool M-3
M-4
Riffle/run
complex
M-5
M-6
M-7
Low gradient
riffle
M-8
M-9
M-10
Moderate
gradient riffle
M-11
M-12
CPLStudy.P]n/Fina1
WILL BE PROVIDED PRIOR TO DATA ANALYSIS
35
Table 8-3. Transects identified for PHABSIM measurements in the lower study segment of
the bypassed reach of the Pigeon River below Walters Dam. Segment length is 4.9
mi (25,872 ft).
Habitat Transect
type number
Deep pool
L-1
L-2
Shallow pool
L-3
L-4
Deep run
L-5
L-6
L-7
Boulder run
L-8
L-9
High gradient
riffle with plunge
pools and cascades
L-10
L-11
L-12
Amount of habitat Length represented
within segment(ft) by each transect(ft)
WILL BE PROVIDED PRIOR TO DATA ANALYSIS
CPLStu4.Pin hm1 36
9.0 QA/QC
RMC maintains a list of procedures for data collection', data handling, and data processing.
These procedures are rigorously enforced in all studies undertaken by RMC. For example,
double key data entry is used to identify and rectify any key punching or transcription errors.
The biologists collecting the data participate in this process so that when the data are
permanently stored on an electronic medium they are verified, authenticated, and ready to use for
analyses. A list of these procedures will be made available upon request, if participating agencies
wish to review them.
crrsmay.riwFinal 37
j 10.0 ANTICIPATED STUDY SCHEDULE, REPORTS AND DELIVERABLES
I
A tentative weekly schedule for work tasks and deliverables is presented in Table 10-1. The
proposed schedule anticipates all field work will be completed by 20 April. This schedule also
assumes good weather and that substantial rainfall does not induce untimely delays in the conduct
i
of the field studies.
RMC anticipates that all relevant data will be key punched, verified, and ready for delivery
to the resource agencies within 30 days of field work completion. Data will be forwarded on a
I
j computer disk. Copies of all field notes will accompany transmittal of the computer disk. If an
alternate route is deemed appropriate by the resource agencies, that request will be
I
accommodated.
I
j
-- i
I
j
- j I
i
I
i
i
ULstudy.PlwFinal 38
i
I
w
Table 10-1 Anticipated weekly schedule for IFIM study at Walters Hydroelectric Project, Pigeon River, North Carolina.
Month
Week
February
March
April
May
June
4
1
2
3
4
5
1
2
3
4
1
2
3
4
1
2
3
4
Work Tasks:
Study Plan Review
X
X
X
Streambed Profiles
X
PHABSIM Field Measurements
X
X
PHABSIM Data Entry/QA/QC
X
X
Hydraulic Modelling
X
X
PHABSIM Data to Agencies
X
Habitat Modelling
X
X
Model Output Compositing
X
Time Series Analysis
X
X
Draft Report (CP&L Internal Review)
X
X
X
Final Report
X
CPI.Study.Pln/FinW
11.0 LITERATURE CITED
Angermeier, P.L. 1987. Spatiotemporal variation in habitat selection by fishes in small
Illinois streams. Pages 52-60 in W. J. Matthews and D. C. Heins; editors. Community and
evolutionary ecology of North American stream fishes. University of Oklahoma Press,
Norman, OY,
Bonner, W. R. 1983. Survey and classification of state -managed trout streams. District Nine
Mountain Fisheries Investigations. Federal Aid in Fish Restoration Project F-24-S. Final
Report. North Carolina Wildlife Resources Commission, Raleigh, NC.
Bovee, K. D. 1982. A guide to stream habitat analysis using the Instream Flow Incremental
Methodology. Instream Flow Information Paper 12. U. S. D. I. Fish and Wildlife Service,
Office of Biological Services. FWS/OBS-82/26. 248 pp.
Carlander, K D. 1969. Handbook of freshwater fishery biology.' Volume one. Iowa State
University Press. Ames, Iowa. 752 pp.
Carlander, K D. 1977. Handbook of freshwater fishery biology. Volume two. Iowa State
University Press. Ames, Iowa. 431 pp.
CP&L (Carolina Power & Light Company). 1990a. Walters Hydroelectric Project, Exhibit E,
Final Environmental Report. Prepared for Federal Energy Regulatory Commission,
Washington, DC.
CP&L (Carolina Power & Light Company). 1990b.. Walters Hydroelectric Project, Information
Package for first stage of consultation. Prepared for Federal Energy Regulatory
Commission, Washington, DC.
Crance, J. H. 1986. Habitat suitability indices for redbreast sunfish. National Ecology
Research Center, U. S. Fish and Wildlife Service, Fort Collins, Colorado. 40 pp.
Gorman, O. T. 1987. Habitat segregation in an assemblage of minnows in an Ozark stream.
Pages 33-41 in W. J. Matthews and D. C. Heins, editors. Community and evolutionary
ecology of North American stream fishes. University of Oklahoma Press, Norman, OK.
Lobb, M. D., III, and D. J. Orth. 1991. Habitat use by an assemblage of fish in a large
warmwater stream. Transactions of the American Fisheries Society 120:65-78.
Messer, J. B. 1964. Survey and classification of the Pigeon River and tributaries, North Carolina.
Final Report, Federal Aid in Fish Restoration Job I-N, Project F-14-R. North Carolina
Wildlife Resources Commission, Raleigh, NC.
Morhardt, J. E., D. F. Hanson, and P. J. Coulston. 1983. Instream flow analysis: increased
accuracy using habitat mapping. Pages 1294-1304 in Waterpower "83". An international
conference on hydropower. Conference proceedings Volume 3: Environmental Impacts,
j Tennessee Valley Authority.
crtsnudysIn/Finat 40
I
Rankin, E. T. 1986. Habitat selection by smallmouth bass in response to physical characteristics
in a natural stream. Transactions of the American Fisheries Society 115:322-334.
Ross, S. T., J. A. Baker, and K. E. Clark. 1987. Microhabitat partitioning of southeastern stream
fishes: temporal and spatial predictability. Pages 42-51 in W. J. Matthews and D. C. Heins,
editors. Community and evolutionary ecology of North American stream fishes. University
of Oklahoma Press, Norman, OK
Sechnick, C. W., R. F. Carline, and R. A. Stein. 1986. Habitat selection by smallmouth bass
in response to physical characteristics of a simulated stream. Transactions of the American
Fisheries Society 115:314-312.
i Simonson, T. D., and W. A. Swenson. 1990. Critical stream velocities for young -of -year
smallmouth bass in relation to habitat use. Transactions of the American Fisheries Society
119:902-909.
I
Todd, B. L. and C. F. Rabeni. 1989. Movement and habitat use by stream -dwelling smallmouth
bass. Transactions of the American Fisheries Society 118:229-242 ,
Trial, J. G., C. S. Wade, J. G. Stanley, and P. C. Nelson. 1983. Habitat suitability information:
common shiner. U. S. Fish and Wildlife Service. FWS/OBS-82/10.40. 22 pp.
crLstnay.PhVF;naI 41
APPENDIX I
TRANSECT PHOTOGRAPHS
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Transect M-5
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Poor Photo Quality
Middle Segment
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Transect M-6
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Middle Segment
Riffle/Run Complex
Transect M-7
Flow ---->
Poor Photo Quality
Middle Segment
Low Gradient Riffle
Transect M-8
Flow >
Poor Photo Quality
Middle Segment
Low Gradient Riffle
Transect M-9
Flow > '
Middle Segment
Low Gradient Riffle
Transect M-10 'i i
Flow >
Poor Photo Quality
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t t'
APPENDIX II
HABITAT SUITABILITY INDICES
AND CURVES
TABLE II-1
Depth and velocity suitability indices for smallmouth bass for the
IFIM study of the bypassed reach of the Pigeon River,
Walters Hydroelectric Project, North Carolina.
Species
Life Stage
Depth (ft)
X Y
Source
Velocity
X Y Source
SMALLMOUTH
BASS
Adult
0.00
0.00
Todd and
0.0
1.00 NCDWR
1.00
0.00
Rabeni (1989)
0.40
0.60
3.00
1.00
Angermeier
0.60
0.20
(1987)
7.00
1.00
Ross et al.
0.80
0.10
(1987)
1.00
0.09
1.90
0.00
Spawning
0.00
0.00
NCDWR
1.00
1.00
Simonson and
0.50
0.00
0.25
1.00
Swenson(1990)
1.00
0.10
1.00
0.00
Todd and
1.50
0.30
Rabeni(1989)
1.80
0.80
2.00
0.95
2.20
1.00
4.80
1.00
5.00
0.95
5.50
0.60
' 6.00
0.35
6.40
0.20
7.00
0.10
7.30
0.05
8.00
0.00
Fry
0.00
0.00
Lobb and
0.00
1.00
Simonson and
0.50
1.00
Orth(1991)
0.20
1.00
Swenson(1990)
2.00
1.00
Angermeier
0.25
0.50
Todd and
4.00
0.00
(1987)
0.50
0.10
Rabeni(1987)
Ross et al.
1.00
0.00
Angermeier
(1987)
(1987)
Rankin(1986)
Sechnick et al.
(1986)
Juvenile
0.00
0.00
Lobb and Orth
0.00
1.00
NCDWR
1.00
1.00
(1991)
-0.40
0.50
4.00
1.00
0.80
0.27
6.00
0.00
1.60
0.10
2.00
0.05
2.50
0.00
TABLE II-2
Depth and velocity suitability indices for redbreast sunfish for
the IFIM study of the bypassed reach of the Pigeon River,
Walters Hydroelectric Project, North Carolina.
Species
Life Stage Depth (ft) Velocity
X Y Source X Y Source
REDBREAST
SUNFISH
Adult
Spawning
Fry
0.00
0.00
NCDWR
0.00
1.00
0.20
0.00
0.75
1.00
1.20
0.80
1.50
0.30
2.00
1.00
3.00
0.00
6.00
1.00
7.50
0.60
8.20
0.00
0.00
0.00
NCDWR
0.00
1.00
0.50
0.00
0.40
1.00
0.75
0.80
0.50
0.90
1.00
1.00
1.00
0.15
2.50
1.00
1.35
0.00
3.10
0.60
7.00
0.00
0.00
0.00
Lobb and
0.00
1.00
0.50
1.00
Orth(1991)
0.20
1.00
2.00
1.00
Simonson and
0.25
0.50
4.00
0.00
Swenson (1990)
0.50
0.10
Ross et al.
1.00
0.00
(1987)
Juvenile 0.00
0.00 NCDWR
0.40
1.00
5.00
1.00
7.30
0.00
0.00 1.00
0.30 1.00
0.50 0.90
1.00 0.15
1.40 0.00
Crance (1986)
Lobb and Orth
(1991)
NCDWR
Lobb and Orth
(1991)
Lobb and Orth
(1991)
Simonson and
Swenson (1990)
Ross et al.
(1987)
NCDWR
Crance (1986)
II-2
TABLE II-3
Depth and suitability indices for common shiner for the IFIM study
of the bypassed reach of the Pigeon River, Walters
Hydroelectric Project, North Carolina. Common shiner was
selected as a surrogate for whitetail shiner.
Species
Life Stage
Depth (ft)
X Y
Source
Velocity
X Y
Source
COMMON SHINER
Adult
0.00
0.00
Lobb and
0.00
0.50
Lobb and
1.00
1.00
Orth (1.991)
0.50
1.00
Orth (1991)
2.50
1.00
Gorman (1987)
1.50
1.00
Gorman (1987)
4.00
0.00
Ross et al.
2.00
0.00
Ross et al.
(1987)
(1987)
Trial et al.
Trial et al.
(1983)
(1983)
Spawning 0.00
0.00
Lobb and
0.00
0.00
Lobb and
0.50
1.00
Orth (1991)
0.50
1.00
Orth (1991)
1.00
1.00
Gorman (1987)
1.00
1.00
Gorman (1987)
2.50
0.00
Ross et al.
1.50
0.00
Ross et al.
(1987)
(1987)
Trial et al.
Trial et al.
(1983)
(1983)
Fry 0.00
0.00
-Lobb and
0.00
1.00
Lobb and
0.50
1.00
Orth (1991)
0.50
0.10
Orth (1991)
1.00
1.00
Gorman (1987)
1.00
0.00
Gorman (1987)
1.50
0.00
Ross et al.
Ross et al.
(1987)
(1987)
Trial et al.
Trial et al.
(1983)
(1983)
Juvenile 0.00
0.00
Lobb and 0.00 1.00
Lobb and
0.50
1.00
Orth (1991) 0.50 0.10
Orth (1991)
1.50
1.00
Gorman (1987) 1.00 0.00
Gorman (1987)
3.00
0.00
Ross et al.
Ross et al.
(1987)
(1987)
Trial et al.
Trial et al.
(1983)
(1983)
II-3
TABLE II-4
Substrate'/cover HSI's for adult (Ad), spawning (Sp), fry, and juvenile (Juv) smallmouth bass.
Life Stage
Ad
52
Er. y
Juv
1 No cover and terrestrial vegetation
0.2
0.1
0.7
0.5
2 No cover and sand
0.5
0.7
0.1
0.5
3 No cover and gravel
0.7
0.9
0.5
0.5
4 No cover and cobble
0.8
0.5
0.8
1.0
5 No cover and small embedded boulder
0.6
0.2
0.4
0.5
6 No cover and embedded boulder or angled bedrock
0.7
0.0
0.2
0.5
7 No cover, and mud or flat bedrock
0.1
0.1
0.0
0.5-
8
Overhead vegetation' and terrestrial vegetation,
flat bedrock, sand or mud
0.5
0.2
0.5
0.5
9
Overhead vegetation and gravel
0.7
0.6
0.7
1.0
10
Overhead vegetation and cobble
0.8
0.4
1.0
1.0
11
Overhead vegetation and small boulder, boulder, or
angled bedrock
1.0
0.7
0.9
1.0
12
Instream cover and sand, gravel or cobble
0.8
1.0
1.0
1.0
13
Instream cover and small boulder, boulder or bedrock
1.0
0.7
0.9
1.0
14
Proximal' instream cover and sand, gravel or cobble
0.7
0.9
0.9
1.0
15
Proximal instream cover and small boulder, boulder
0.9
0.6
0.8
1.0
or bedrock
' = Wentworth scale to be used for substrate
' = Overhead vegetation within 3 ft of surface
° = Proximal cover assigned to represent cell conditions within 4 ft upstream and downstream
II-4
TABLE II-5
Substrate'/cover HSI's for adult (Ad), spawning (Sp), fry, and juvenile (Juv) redbreast sunfish.
Life Stage
Ad
SR
Fa
Juv
1 No cover and terrestrial vegetation
0.1
0.1
0.7
0.8
2 No cover and sand
0.3
0.7
0.1
0.4
3 No cover and gravel
0.5
0.8
0.5
0.6
4 No cover and cobble
0.8
0.7
0.8
0.8
5 No cover and small embedded boulder
0.7
0.2
0.1
0.6
6 No cover and embedded boulder or angled bedrock
0.3
0.0
0.1
0.4
7 No cover, and mud or flat bedrock
0.1
0.1
0.1
0.1
8
Overhead vegetation and terrestrial vegetation,
flat bedrock, sand or mud
0.8
0.2
0.5
0.8
9
Overhead vegetation and gravel
1.0
0.6
0.6
0.9
10
Overhead -vegetation and cobble
0.9
0.4
0.8
1.0
11
Overhead vegetation and small boulder, boulder, or
angled bedrock
0.9
0.7
0.7
0.9
12
Instream cover and sand, gravel or cobble
1.0
1.0
1.0
1.0
13
Instream cover and small boulder, boulder or bedrock
0.9
0.7
0.7
0.9
14
Proximal' instream cover and sand, gravel or cobble
0.9
0.9
0.9
0.9
15
Proximal instream cover and small boulder, boulder
0.8
0.6
0.6
0.8
or bedrock
' = Wentworth scale to be used for substrate
b = Overhead vegetation within 3 ft of surface
= Proximal cover assigned to represent cell conditions within 4 ft upstream and downstream
11-5
TABLE II-6
Substrate'/cover HSI's for adult (Ad), spawning (Sp), fry, and juvenile (Juv) common shiner.
Life Stage
Ad
SR
FU
Juv
1
No cover and terrestrial vegetation
0.4
0.0
0.6
0.5
2
No cover and sand
0.2
0.0
0.2
0.2
3
No cover and gravel
1.0
1.0
1.0
1.0
4
No cover and cobble
0.8
0.0
0.8
0.8
5
No cover and small embedded boulder
0.3
0.0
0.3
0.3
6
No cover and embedded boulder or angled bedrock
0.3
0.0
0.1
0.2
7
No cover, and mud or flat bedrock
0.4
0.0
0.4
0.4
8
Overhead vegetation and terrestrial vegetation,
flat bedrock, sand, or mud
0.2
0.0
0.5
0.3
9
Overhead vegetation and gravel
1.0
1.0
1.0
1.0
10
Overhead vegetation and cobble
0.4
0.0
0.7
0.5
11
Overhead vegetation and small boulder, boulder,
or angled bedrock
0.3
0.0
0.3
0.4
12
Instream cover and sand, gravel, or cobble
0.7
0.8
0.8
0.7
13
Instream cover and small boulder, boulder, or bedrock
0.3
0.0
0.3
0.3
14
Proximal' instream cover and sand, gravel, or cobble
0.7
0.9
0.9
0.7
15
Proximal instream cover and small boulder, boulder
0.3
0.8
0.3
0.3
or bedrock
' =
Wentworth scale to be used for substrate
b =
Overhead vegetation within 3 ft of surface
=
Proximal cover assigned to represent cell conditions within
4 ft upstream and downstream
II-6
ADULT SMALLMOUTH BASS - VELOCITY HSI
H
H
(o
3
p0.1 . ... ..... ..... .... .. . . .... -- ..... ........ . ......... .... 1� ... ....... I-- ... . . ...... .... .. -- ... ... . ... .. .......... ...... .... .... ..... ... ...... . ... .. . ...... ...... . .....
E
X 0.0-,
0 1 2 3 4 5 6 7
DEPTH 00
FIGURE 3
Habitat suitability index curve for spawning smallmouth bass
to be used in the Walters Hydro Project IFIM study,
Pigeon River, North Carolina.
H
A
B
I
T
A
T
S
U
I
T
A
B
I
L
I
T
Y
I
N
D
E
X
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0
SMALLNIOUTH BASS FRY - DEPTH HSI
1 2 3 4 5
DEPTH 00
6 7 8
FIGURE 5
Habitat suitability index curve for smallmouth bass fry
to be used in the Walters Hydro Project IFIM study,
Pigeon River, North Carolina.
SMALLMOUTH BASS FRY - VELOCITY HSI
H 1.0
A Source: Angermeier (1987)
II 0'9 Rankin (1986)
T A 0.8 Sechnick,. et .al (1986)
T Simonson and Swenson (1990)
s 0.7 Todd and Rabeni (1989)
1 0.6
T
A 0.5
B
H I 0.4
T 0.3
Y
0.2
N
p 0.1
E
X 0.0
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3
VELOCITY (ft/s)
FIGURE 6
Habitat suitability index curve for smallmouth bass fry
to be used in the Walters Hydro Project IFIM study,
Pigeon River, North Carolina.
H
A
B
I
T
A
T
s
u
T
A
B
I
L
I
T
Y
I
N
D
E
x
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0
JUVENILE SMALLMOUTH BASS -'DEPTH HSI
11)
1 2 3 4 5 6 7 8
DEPTH (ft)
FIGURE 7
Habitat suitability, index curve for juvenile smallmouth bass
to be used in the Walters Hydro Project IFIM study,
Pigeon River, North Carolina.
H 1.0
A
B 0.9
I
A 0.8
T
0.7
S
�
0.6
T
A
0.5
B
1
L
0.4
T
0.3
Y
1
0.2
p
0.1
E
X
0.0
0
JUVENILE SMALLMOUTH BASS - VELOCITY HSI
0.5 1 1.5 2 2.5 3
VELOCITY (ft/sec)
FIGURE 8
Habitat suitability index curve for juvenile smallmouth bass
to be used in the Walters Hydro Project IFIM study,
Pigeon River, North Carolina.
H
1.0
A
B
0.9
A
0.8
T
0.7
S
�
0.6
T
AA
0.5
H I
L
0.4
T
0: 3
Y
1
0.2
N
D
0.1
E
X
O.Orq
0
ADULT REDBREAST SUNFISH - DEPTH HSI
1 2 3 4 5 6 7 8
- DEPTH 00 .
FIGURE 9
Habitat suitability index curve for adult redbreast sunfish
to be used in the Walters Hydro Project IFIM study,
Pigeon River, North Carolina.
H
A
B
I
T
A
T
S
U
T
A
B
I
L
I
T
Y
I
N
D
E
X
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0
ADULT REDBREAST SUNFISH - VELOCITY HSI
0.5 1 1.5 2 2.5 3
VELOCITY (ft/sec)
FIGURE 10
Habitat suitability index curve for adult redbreast sunfish
to be used in the Walters Hydro Project IFIM study,
Pigeon River, North Carolina.
SPAWNING REDBREAST SUNFISH - DEPTH HSI
H 1.0
A
B 0.9
I
A 0.8
T
0.7
s
� 0.6
T
A 0.5
B
1 0.4
L
I
T 0.3
Y
1 0.2
p 0.1
E
X 0.0
0 1 2 3 4 5 6 7
DEPTH 00
FIGURE 11
Habitat suitability index curve for spawning redbreast
sunfish to be used in the Walters Hydro Project IFIM study,
Pigeon River, North Carolina.
H 1.0
A
B 0.9
I
A 0.8
T
0.7
s
�
0.6
T
A
0.5
B
I
L
0.4
T
0.3
Y
1 0.2
p 0.1
E
X 0.0
0
SPAWNING REDBREAST SUNFISH - VELOCITY HSI
0.5 1 1.5 2 2.5 3
VELOCITY (ft/sec)
FIGURE 12
Habitat suitability index curve for spawning redbreast
sunfish to be used in the Walters Hydro Project IFIM study,
Pigeon River, North Carolina.
1.0
A 0.9
B
T 0.8
A
�11VA
S
U 0.6
T
A 0.5
B
0.4
Y 0.3
N 0.2
D
x 0.1
w
i
REDBREAST SUNFISH FRY - DEPTH HSI
1 2 3 4 5 6 7 8
DEPTH 00
FIGURE 13
Habitat suitability index curve for redbreast sunfish fry
to be used in the Walters Hydro Project IFIM study,
Pigeon River, North Carolina.
H 1.0
A
B 0.9
I
A 0.8
T
0.7
s
U
0.6
T
A
0.5
B
L
0.4
N
T
0.3
Y
1 0.2
N
p 0.1
E
X 0.0
0
REDBREAST SUNFISH FRY - VELOCITY HSI
0.5 1 1.5 2 2.5 3
VELOCITY (ft/sec)
FIGURE 14
Habitat -suitability index curve for redbreast sunfish fry
to be used in the Walters Hydro Project IFIM study,
Pigeon River, North Carolina.
v
JUVENILE REDBREAST SUNFISH - DEPTH HSI
H
A
B
I
T
A
T
S
U
I
T
A
B
H
I
L
�
N
I
T
Y
I
N
D
E
X
M
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0
1 2 3 4 5 6 7 8
DEPTH 00
FIGURE 15
Habitat suitability index curve for juvenile redbreast
sunfish to be used in the Walters Hydro Project IFIM study,
Pigeon River, North Carolina.
1.0
A
0.9
B
T
0.8
A
T
0.7
s
U
0.6
1
T
A
0.5
B
I
H L
0.4
H I
N Y
0.3
N
0.2
D
x
0.1
'i
we
JUVENILE REDBREAST SUNFISH - VELOCITY HSI
0.5 1 1.5 2 2.5 3
VELOCITY (ft/sec)
FIGURE 16
Habitat suitability index curve for juvenile redbreast'
sunfish to be used in the Walters Hydro Project IFIM study,
Pigeon River, North Carolina.
ADULT COMMON SHINER - DEPTH HSI
H 1.0
A Source: Gorman(1987)
B 0.9
Lobb and Orth (1991)
A 0.8
_ .. Ross._. et at (1987)
T Trial et a/ (1983)
0.7
s
� 0.6
T
A 0.5 _
B
1 0.4
L
I
T 0.3
Y
02 _.
N
D 0.1
E
X 0.0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8
DEPTH (ft)
FIGURE 17
Habitat suitability index curve for adult common shiner
to be used in the Walters Hydro Project IFIM study,
Pigeon River, North Carolina.
H
1.0
A
B
I
0.9
A
0.8
T
0.7
S
�
0.6
T
A
0.5
B
H L
0.4
N 1
T
0.3
Y
1
0.2
N
p
0.1
E
X
0.0
0
ADULT COMMON SHINER - VELOCITY HSI
0.5 1 1.5 2 2.5 3
VELOCITY (ft/sec)
FIGURE 18
Habitat suitability index curve for adult common shiner
to be used in the Walters Hydro Project IFIM study,
Pigeon River, North Carolina.
SPAWNING COMMON SHINER - DEPTH HSI
H
1.0
A
B
I
0.9
A
0.8
T
0.7
s
U
0 6
_..
T
A
0.5
-
B
1
L
0.4
T
0.3
- -
Y
1
0.2
p
0.1
____.........
E
X
0.0
1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8
DEPTH 00
FIGURE 19
Habitat suitability index curve for spawning common
shiner to be used in the Walters Hydro Project IFIM study,
Pigeon River, North Carolina.
SPAWNING COMMON SHINER - VELOCITY HSI
H 1.0
A Source: Gorman(1987)
1 0.9 Lobb and Orth (1991)
T
A 0.8 _ __ _. _ Ross et a/,. (1987)
T Trial et a/ (1983)
0.7
s
0.6
T
A 0.5
B
04
N I
T 0.3
Y
0 2 ...
p 0.1
E
X 0.0
0 0.5 1 1.5 2 2.5 3
VELOCITY (ft/sec)
FIGURE 20
Habitat suitability index curve for spawning common
shiner to be used in the Walters Hydro Project IFIM study,
Pigeon River, North Carolina.
FIGURE 21
Habitat suitability index curve for common shiner fry
to be used in the Walters Hydro Project IFIM study,
Pigeon River, North Carolina.
H 1.0
A
B 0.9
I
A 0.8
T
0.7
S
� 0.6
T
A 0.5
B
1 0.4
L
T 0.3
Y
1 0.2
p 0.1
E
X 0.0
0
COMMON SHINER FRY- VELOCITY HSI
0.5 1 1.5 2 2.5 3
VELOCITY (ft/sec)
FIGURE 22
Habitat suitability index curve for common shiner fry
to be used in the Walters Hydro Project IFIM study,
Pigeon River, North Carolina.
JUVENILE COMMON SHINER
DEPTH HSI
H1-0
. ... . . . .. .... .................. - - . ........
. . ...... ........ . ... ..
AB
Source:
Gorman(1987)
I
.
..................
L 0' b b ..and' Ort h (1991)
T
.. ...... . .. ...... .... ...... . . . .... . ........
..... ... ... . ....
T
Trial et al (1983)
0.7
S
U
I
0.6
.... ... . . ....... ........ .......... . . . . ............ . ....................
T
A0.5
..... ..... ...... ...... .... .................. .... .. ... .... . . ... ....
...... . ... ..... .
B
1
L
0. 4
-
. . .. ....... .......... . ... .
. .... .
T0.3
-
. ... ... . ... .. . ...... . . .... . . .......
Y
1
0.2
----------- . .. . .. . ............................... ...... . ....... .. .. ..... . . . .. ..... . ..
N
D0.1
. . . .... ..... ..... . .... - - - ----- . . ....... . ... . ......... . . .... ...... . .....
. . . ........ ...... .... . ........................... . .... ... . ..... ......
E
X
0.0
0
0.5 1 1.5 2 2.5 3 3.5 4 4.5
5 6.5 6 6.5 7 7.5 8
DEPTH (ft)
FIGURE 23
Habitat suitability index curve for juvenile common
shiner to be used in the Walters Hydro Project IFIM study,
Pigeon River, North Carolina.
MEMORANDUM
DIVISION OF ENVIRONMENTAL MANAGEMENT
WATER QUALITY SECTION
2 June, 1992
TO: 'Ken Eagleson
THROUGH: Jimmie Overto
Trish MacPherson
FROM: David Penrose a
ARE'—EIVCD
Water Quality SIctim
JUN 1 1 1I92
Asheville Regional ot*
Asheville, North Carolf.m
SUBJECT: Evaluation of Water Quality in the Pigeon River below Walter's Dam,
before and after calibration releases from the dam.
BACKGROUND.
The Pigeon River, in western Haywood' County, is perhaps one of the most intensely
surveyed rivers in North Carolina. Our group has collected data from the river to assess
the effects of the Champion Paper Company discharge under several temperature and flow
regimes, as well as during several BMAN investigations. Our sampling sites have included
locations above and below the Champion discharge point (Canton, Clyde, Hepco and
Crabtree), as well as below the CP&L Powerhouse at the Tennessee State line (Waterville).
However, our group has not collected data from the 12-mile reach of the Pigeon River
below the Walter's Dam at Waterville Lake to the CP&L Powerhouse. The flow in this
bypassed reach is only a fraction of the flow of the river above Waterville Lake. CP&L
diverts the flow of the river via a diversion tunnel to the Powerhouse to generate electricity.
The flow in this section is principally tributary flow and occasionally, "spill over" from the
dam during high flow, storm events.
A proposal to augment the flow has recently been proposed by the Division of Water
Resources and the North Carolina Wildlife Resources Commission. This project proposes
to divert the tributary flow from Cataloochee Creek, which flows into Waterville Lake near
the dam, to below the dam. The flow from Cataloochee Creek would not only improve the
quality, but also the quantity of water in the reach of the Pigeon River below the dam. It is
also assumed that this increase in flow would create a substantial recreational benefit as the
Pigeon River below the dam contains several class III -IV rapids (see the March 1992,
Wildlife in North Carolina). The by-passed reach below the dam currently contains a
productive small mouth bass fishery. However, if the flow is augmented with Cataloochee
Creek, there is a potential to create a trout fishery as well.
CP&L and our Division of Water Resources conducted a series of "calibration studies"
during a three week period beginning during the week of March 23rd. These calibration
studies were conducted by releasing water from Waterville Dam at 40, 175 and 300 cfs
intervals. Regional personnel were concerned that there may be some detrimental effects of
this test to the fauna of the Pigeon River below the dam. - In March 1992, benthic
macroinvertebrates were collected prior to the calibration studies and were also collected
after the calibration studies to assess any impacts. In addition, this investigation will
determine the community composition of this section of the Pigeon River prior to any
addition of Cataloochee Creek water.
STATION LOCATIONS (Table 1, Figure 1).
Samples were collected from two locations on the Pigeon River during this
investigation. Station PR 1 is located approximately 4 miles below the dam near the
confluence with Hurricane Creek. The downstream location, Station PR,2, is located near
the confluence with Counterfeit Branch approximately 9.5 miles below the dam.
w�
Consultants for CP&L have written a study plan for the calibration studies (RMC
Environmental Services, Inc. 1992). In the study plan, the consultants note that the
drainage area of the bypassed reach of the Pigeon River is approximately 44 mi2 and that
there are three distinct segments of the bypass reach based on flow, gradient, and habitat
characteristics. These include an upper segment (from the dam to Hurricane Creek
approximately 4 river miles), a middle segment (from Hurricane Creek to Groundhog
Creek approximately 3.1 river miles) and a lower segment (from Groundhog Creek to the
Powerhouse approximately 4.9 miles). The upper and lower segments are generally
characterized by fairly high gradients while the middle segment has a lower gradient. Our
collection locations were selected in the upper and lower segments. However, the gradient
at the upper collection location (Station 1) is very low which is atypical for this upper
segment. River flow increases progressively downstream as tributary flow enters the
Pigeon River.
Benthic macroinvertebrates were also collected from Cold Springs Branch, a tributar)
of the middle segment of the Pigeon River. Data from this location were used to determine
any seasonal correction factors.
Table 1. Physical and Chemical Characteristics. Pigeon River Calibration Test.
Haywood County, North Carolina.
March and April, 1992.
Station Location
Pigeon R 1
Pigeon R 2
Cold Springs Br
Width (M)
18
25
8
Depth (M)
Average
0.2
0.5
0.2
Maximum
0.8
2.0
1.0
Canopy(%)
45
50
80
Aufuwchs
Abundant
Slight
Moderate
Bank Erosion
None to Moderate
None
Moderate
Substrate (%)
Boulder
30
65
30
Rubble
40
20
40
Gravel
15
15
15
Sand
10
Trace
15
Silt
5
Trace
Trace
Comments
very low flow, high gradient
next to gov. Rd
heavy Aufuwchs clean
substr.
below campgrd.
Pigeon River 1
Pigeon River2 Cold Springs
Br
Water Chemistry
March Aril
March
April March
April
Temperature (OC)
9.0 17
9.3
17 8.9
15
Dissolved Oxygen (mg/1)
11.3 10.3
9.8
9.6 11.7
9.6
Conductivity (umhos at 25°C) 98 80
33
56 21
31
pH
7.4 7.9
7.4
7.6 6.9
7.3
COLLECTION AND ANALYSIS METHODS
Samples were collected using DEM's standardized qualitative collection technique at all
locations. This method uses a wide variety of collection techniques (10 samples) to
inventory the aquatic fauna. The primary output is a taxa list with some indication of
relative abundance (Abundant, Common and Rare) for each taxon. The numbers of species
within the pollution intolerant insect orders of Ephemeroptera, Plecoptera and Trichoptera
Figurel. Station Locations. Pigeon River Calibration Test
Haywood County, North Carolina. March and April, 1992.
Power House
_Counterfeit Br
roundhog Creek
Pigeon River
Diversion Tunnel
-Walters Dam —V
Cold Springs Br
Hurricane Creek
Cataloochee Cr J Waterville Lake
(EPT) and Biotic Index values are used with DEM classification criteria to assign water
quality ratings. Unstressed streams and rivers have many species, while polluted areas
have fewer species. The Biotic Index value is a summary of tolerance values of the
species collected in the sample, weighted by their abundance. Tolerance values for the taxa
vary from 0 (most intolerant) to 5 (most tolerant). A seasonal correction factor was used to
interpret any between season changes in taxa richness totals and also allows a direct
comparison to summer data. This correction factor involves numerically subtracting
seasonally abundant Plecoptera (based on percent occurrence) from the total taxa richness
values.
RESULTS AND DISCUSSION (Table 2)
Data presented in Table 2 indicate that there were no changes in water quality conditions
in the Pigeon River following the calibration study conducted by CP&L. Good/Fair water
quality conditions were noted at the most upstream location (PR1, Pigeon River at
Hurricane Creek) during both surveys. Some differences were noted in the presence or
absence of particular taxa between surveys at this location. However, it is felt that these
differences are not directly due to the effects of the calibration study. An increase in water
temperature was noted during the April investigation of approximately 80C at both Pigeon
River locations (Table 1). This difference may be a normal seasonal difference at this
location. It is interesting to note that the abundance of stonefly taxa was lower at both
Pigeon River locations in April (probably responding to an increase in water temperature)
and higher at Cold Springs Branch. The EPT biotic index at PR1 was somewhat higher
(lower water quality) in April following the calibration study, which may also be related to
Table 2. Benthic Macroinvertebrate Taxa Richness and Summary Statistics. Pigeon River
Calibration Test.
Haywood
County, North Carolina. March and April,
1992.
PR1 3/92 PR1 4/92
PR2 3/92 PR2 4/92
CSB 3/92 CSB 4/92
Ephemeroptera
14
12
20
21
17
20
Plecoptera
5
3
11
8
11
14
Trichoptera
11
13
10
14
17
14
Coleoptera
1
0
1
2
4
2
Odonata
8
7
2
8
0
0
Megaloptera
2
2
2
1
1
1
Diptera
22
24
23
28
14
21
Misc. Diptera
4
4
5
6
11
9
Oligochaeta
2
3
2
2
1
2
Crustacea
0
1
0
1
1
1
Mollusca
4
3
1
3
1
0
Other
1
2
0
0
0
0
Tot. Taxa Richness
74
74
77
94
78
84
EPT Richness
30
28
41
43
45
48
EPT less Spr Plecopt.
27
27
34
39
40
39
EPT Abundance
127
141
163
169
243
270
Biotic Index
2.84
2.92
2.14
2.29
1.62
1.65
Corrected Biotic Index
3.14
3.22
2.44
2.59
1.92
1.95
EPT Biotic Index
2.05
2.43
1.66
1.57
1.17
1.30
Bioclassification
G/F
G/F
Good
Good
Excellent
Excellent
lower stonefly numbers collected then. Fewer stonefly numbers at this location is a likely
response to higher water temperature in April rather than any perturbation. Several winter
stonefly taxa that were common in March were not collected in April (Helopicus
subvarians, Isoperla namata and Strophopteryx spp.).
Water quality conditions improved at PR2 near the confluence with Counterfeit Branch
when compared to conditions at PRl. Good bioclassifications were rioted at this site both
before and after the calibration study. Once again, the taxa richness and abundance of
stoneflies was lower at this site after the calibration study. The EPT biotic index values
from -this location were similar during both surveys, perhaps responding to the increased
influence of tributary flow at this point.
Excellent water quality conditions were noted at Cold Springs Branch (the reference
location) during both investigations. The taxa richness criteria at this location were
borderline excellent, however, the biotic index values were well within the excellent
bioclassification range (< 2.14). These results indicate that this stream may qualify for
the supplemental classification of High Quality Waters.
SUMMARY
Benthic macroinvertebrate samples were collected from two locations on the Pigeon
River in Haywood County to assess the effect of an instream flow calibration study. The
samples were collected using DEM's standardized collection technique. Results of this
investigation indicated that water quality was not impacted by the release of Waterville Lake
water into the Pigeon River during the calibration study. Good/Fair and Good water
quality was noted at the Pigeon River at Hurricane Branch and the Pigeon River near
Counterfeit Branch, respectively, during surveys conducted in March and April at these
two locations. Some differences were noted between the surveys in the taxa richness and
abundance values of stonefly (Plecoptera) taxa.
Excellent water quality was noted at Cold Springs Branch during both investigations.
These data suggest that Cold Springs Branch should be considered for reclassification to
High Quality Waters.
All work was conducted in Subbasin 04-03-05
cc: ' F0"rresW7V"7!tall,. Asheville Regional Office
Buzz Bryson, Carolina Power and Light Company
Appendix 1. Benthic macroinvertebrates collected from the Pigeon River (PR) and Cold
Springs Branch (CSB), Haywood County North Carolina. March, April
1992.
Organism PRl 3/92 PRl 4/92 PR2 3/92 PR2 4/92 CSB 3/92 CSB 4/92
Ephemeroptera
AMELETUS LINEATUS C
BAETIS FLAVISTRIGA
BAETIS TRICAUDATUS R
CENTROPTILUM SPP
CINYGMULA SUBAEQUALIS
CLOEON SPP A
DANNELLA SIMPLEX
DRUNELLA
DRUNELLA CORNUTELLA
DRUNELLA LATA
DRUNELLA TUBERCULATA
DRUNELLA WAYAH
EPEORUS DISPAR R
EPEORUS PLEURALIS R
EPEORUS RUBIDUS R
EPHEMERA BLANDA
EPHEMERA GUTTALATA
EPHEMERELLA CATAWBA (GROUP) R
EPHEMERELLA INVARIA (GR) R
EPHEMERELLA ROSSI (GR)
EPHEMERELLA ROTUNDA
EPHEMERELLA SEPTENTRIONALIS
EURYLOPHELLA BICOLOR
EURYLOPHELLA FUNERALIS
EURYLOPHELLA TEMPORALIS R
HEPTAGENIA MARGINALIS
ISONYCHIA SPP A
LEUCROCUTA APHRODITE R
PARALEPTOPHLEBIA SPP
PSEUDOCLOEON SPP
RHITHROGENA SPP
SERRATELLA DEFICIENS
STENACRON INTERPUNCTATUM C
STENACRON PALLIDUM R
STENONEMA ITHACA A
STENONEMA MODESTUM
STENONEMA PUDICUM
Plecoptera
ACRONEURIA ABNORMIS C
ALLOCAPNIA
AMPHINEMURA SPP
HELOPICUS SUBVARIANS C
ISOPERLA DICALA
ISOPERLA HOLOCHLORA
ISOPERLA NAMATA (GR) C
ISOPERLA NR HOLOCHLORA
ISOPERLA NR SLOSSONAE
ISOPERLA ORATA
ISOPERLA SLOSSONAE
A
C
A A
A
C
R
R
A A
C
C
C
R
A A
C
C
R
R
R
C
R
R
R
R
A
A
A A
R
R
A A
R
C R
R
R
A
A
C A
C
A A
A A
R
R
A
C
R
A
R C
A
A
C
A
A
C
A
A
A
C C
A C
R
C
C
R A
R
R
R
A
C
C
C
A
A
A
A
C
C
A
A C
C
A
A
A C
R
R C
R
R
C
R
C
R
R
A
A
C
A A
R
R
R R
A
ISOPERLA SPP
R
MALIREKUS HASTATUS
A A
PARAGNETINA ICHUSA
C
C
PROSTOIA
R
PTERONARCYS SPP
R
C A
STROPHOPTERYX SPP
C
R
R
SWELTSA SPP
R
A C
TAENIOPTERYX SPP
R
R
TALLOPERLA SPP
R
C
C
A A
YUGUSBULBOSUS
C R
Trichoptera
AGAPETUS SPP
R C
CERACLEA SPP
R
CHEUMATOPSYCHE SPP
A
A
C
C
A C
CHIMARRA SPP
A
A
C
C
DIPLECTRONA MODESTA
A A
DOLOPHILODES SPP
A
C A
GLOSSOSOMA SPP
A
R
R
R R
HYDROPSYCHE BETTENI
C
C
HYDROPTILA SPP
C
A
R.
LEPIDOSTOMA SPP
R
R
LEUCOTRICHIA PICTIPES
A
A
C
C
MICRASEMA WATAGA
C
MYSTACIDES SEPULCHRALUS
C
NEOPHYLAX MITCHELLI
R
R C
NEOPHYLAX SPP
R
A A
NEURECLIPSIS SPP
R
C
NYCTIOPHYLAX CELTA
R
A
NYCTIOPHYLAX MOESTUS
R
NYCTIOPHYLAX NEPHOPHILUS
R
C
NYCTIOPHYLAX SPP
C
OECETIS SP1
R
POLYCENTROPUSSPP
A
A
C
C
C R
PSYCHOMYIA FLAVIDA
R
PYCNOPSYCHE GENTILIS
R
PYCNOPSYCHE SPP
R
C R
RHYACOPHILA ATRATA
R
RHYACOPHILA CAROLINA
R
C
R C
RHYACOPHILA FUSCULA
A A
RHYACOPHILA NIGRITA
R
SYMPHITOPSYCHE MACLEODI
A
SYMPHITOPSYCHE MOROSA
R
SYMPHITOPSYCHE SLOSSONAE
R
SYMPHITOPSYCHE SPARNA
A
C
A
A
A A
Coleoptera
DINEUTES SPP
R
R
HELICHUS SP
R
R
OPTIOSERVUS SPP
C R
PELTODYTES SPP
R
PROMORESIA SPP
R
PSEPHENUS HERRICKI
C R
Crustacea
ASTACIDAE
R
R R
CRANGONYX SPP
R
Diptera: Chironomidae
ABLABESMYIA MALLOCHI
A
C
BRILLIA SPP
R
R
R
CARDIOCLADIUS SPP
R
CONCHAPELOPIA GROUP
C
R
C
C
C
CORYNONEURA SPP
R
R
R
R
R
CRICOTOPUS/ORTHOCLADIUS SPI
A
A
A
C
CRICOTOPUS/ORTHOCLADIUS SPIO
A
C
A
A
A
CRICOTOPUS/ORTHOCLADIUS SP13
A
A
A
CRICOTOPUS/ORTHOCLADIUS SP2
R
R
CRICOTOPUS/ORTHOCLADIUS SP20
R
CRICOTOPUS/ORTHOCLADIUS SP5
R
R
CRICOTOPUS/ORTHOCLADIUS SP51
A
A
R
CRICOTOPUS/ORTHOCLADIUS SP54
A
C
CRICOTOPUS/ORTHOCLADIUS SP6
A
C
A
CRICOTOPUS/ORTHOCLADIUS SP9
R
CRYPTOCHIRONOMUS FULVUS
R
DEMICRYPTOCHIRONOMUS SPP
R
R
DIAMESA SPP
R
R
A
DICROTENDIPES NEOMODESTUS
R
R
DICROTENDIPES NERVOSUS
C
EUKIEFFERIELLA SP1
R
A
C
R
A
EUKIEFFERIELLA SP11
C
R
EUKIEFFERIELLA SP14
R
EUKIEFFERIELLA SP2
C
R
EUKIEFFERIELLA SP3
C
HELENIELLA SPP
R
LOPESCLADIUS SPP
MICROPSECTRA SPP
C
MICROTENDIPES SPI
C
NANOCLADIUS SPP
A
NILOTANYPUS SPP
R
NILOTHAUMA SPP
R
ODONTOMESA FULVA
R
PARAKIEFFERIELLA SPP
C
PARAMETRIOCNEMUS LUNDBECKI
A
R
R
C
PARAPHAENOCLADIUS SP2
C
PHAENOPSECTRA SPP
C
R
C
POLYPEDff-UM ANGULUM
R
POLYPEDILUM CONVICTUM
C
R
A
A
R
POLYPEDILUM FALLAX
R
C
POLYPEDILUM ILLINOENSE
R
POTTHASTIA GAEDI
R
C
POTTHASTIA LONGIMANUS
PSECTROTANYPUS SPP
A
A
A
RHEOCRICOTOPUS SPI
C
A
RHEOTANYTARSUS
R
C
STENOCHRRONOMUS SPP
R
STICTOCHIRONOMUS SPP
C
SYNORTHOCLADIUS SPP
C
TANYTARSUS SP2
R
A
A
THIENEMANIELLA SPP
R
C
R
A
C
TRIBELOS SPP
R
XENOCHIRONOMUS XENOLABIS
R
ZAVRELIA SPP
C
ZAVRELIMYIA SPP
C
Misc. Diptera
I11
C
R
C
C
C
R
R
C
C
R
R
R
C
R
C
R
C
A
A
C
ANTOCHA SPP
ATHERIX LANTHA
ATHERIX SPP
BLEPHARICERA SPP
DICRANOTA SPP
DIXA SPP.
EMPIDIDAE
HEXATOMA SPP
PALPOMYIA (COMPLEX)
POLYMEDA/ORMOSIA SPP
PROSIMULIUM SPP
SIMULIUM SPP
TIPULA SPP
Gastropoda
ELIMIA SP
FERRISSIA SPP
HELISOMA ANCEPS
MENETUS DILATUS
PHYSELLA SPP
PSEUDOSUCCINEA COLUMELLA
Megaloptera
CORYDALUSCORNUTUS
NIGRONIA SERRICORNIS
Odonata
AESCHNA VERTICALAS
ARGIA SPP
BOYERIA VINOSA
CALOPTERYX SPP
ENALLAGMA SPP
GOMPHUS SPP
HELOCORDULIA SPP
HELOCORDULIA UHLERI
HETAERINA SPP
MACROMIA SPP
NEUROCORDULIA OBSOLETA
NEUROCORDULIA SPP
PERITHEMIS SPP
Oligochaeta
LUMBRICULIDAE
NAIS SPP
OPISTHOPORA SPP
PRISTINA SPP
Other
DUGESIA TIGRINA
HYDRACARINA
C
C
C
C
R
C
R. .
C
A
A
A
A
R
C
R
°C
R
A
C
A
R
R
R
R
R
R
C
C
R
A
A
A
C
A
R
R
R
C
C
R
R
R
R
R
C
R
A
C
R
C
C
A
A
C
C
C
R
C
R;
R
R
A
A
R
R
R
C
R
R
C
A
R
R
R
R
R
R
R
R
R
C
R
R
C
R
A
C
C
C
R
A
A
R
R
R
R
R
C
R
C
a
Carolina Power & Light Company
Technical Services Department
411 Fayetteville Street Mall - P.O. Box 1551
Raleigh, North Carolina 27602
Mr. Forrest Westall
Division of Environmental Management
N.C. Department of Environment, Health, and Natural Resources
Asheville Regional Office'
59 Woodfin Place
Asheville, NC 28801
Dear Mr. Westall:
MAY 1 2 1992 .
RECEIVED
Water QuaAity Sktitw
MAY 1 4 1992
Asheville Regional i`'
.Asheville, North Caro0o
Status of the Walters Hydroelectric Project Instream Flow Study
Federal EnerM ReQulatory Commission Proiect No. 432
Because your agency was consulted during Carolina Power & Light Company's
development of Walters Project instream flow study plan, CP&L would like to inform you
of the status of this study. Approximately two-thirds of the study has been completed to
date which included development of the study plan and all of the field data collection. The
field data collection phase of the study included habitat characterization; transect selection
and placement; substrate/cover classification; and measurements of water surface elevations,
depths, and velocities at the various flow scenarios within the 12-mile bypassed reach of the
Pigeon River. Field data collection was a cooperative effort among personnel from CP&L,
RMC Environmental Services, Inc. (CP&L's consultant for the study), the North Carolina
Division of Water Resources (NCDWR), and the North Carolina Wildlife Resources
Commission (NCWRC). All field data were collected by April 17, 1992. CP&L's
consultant, RMC, is currently reviewing the data for input into the computer model. We
anticipate having a final study report during late June 1992.
As requested by staff from NCDWR and NCWRC during our consultation on the
instream flow study, CP&L plans to perform modeling of water temperatures in the
bypassed reach. This modeling effort will evaluate the temperature regimes which would
be expected seasonally at various points within the bypassed reach under various flow
scenarios being considered (i.e., 40 cfs from the Cataloochee Creek diversion proposal and
a range of flows from the lake). This modeling study will be conducted in parallel to the
on -going instream flow study, and we anticipate a report issued during the same time,frame
that the instream flow report is issued.
A difference between the final study plan issued to your agency on April 1, 1992,
and the actual field data collection was the use of 175 efs as the intermediate test flow
instead of 130 cfs. Both the NCDWR and NCWRC verbally agreed to use the 175 cfs
release in lieu of the 130 cfs release for the intermediate test flow. On -site field crews were
able to safely obtain all water surface elevations, depth, and velocity measurements at the
175 cfs release.
1
A copy of the results of the instream flow study will be provide to you as soon as
it is available, together with full documentation of our consultation with various agencies.
Please contact Mr. Buzz Bryson of my staff at (919) 546-4903 if you have any questions.
GJO/jc
cc: L9'r"'Max Haner (NCDEM)
Mr. Mark Pawlowski (FERC)
Mr. Dave Pen -rose (N '•DEM)
N
Yours very truly,
George J. Oliver, Ph.D
Manager
Environmental Services
u