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Home My WebLink AboutHaywood 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 ,r '-A '-A '-' �-A �-' �-A �-+ *A �-' �-A �-k N � � �-+ �--& N"A HA N 1-A �a O o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 C!1 th .41 .P .L1 A W W W W N N N N 1-+ I-+ F-+ I--& O O O O �? �? �O �f 00 00 a0 RO J :- �l :-] R, t71 01 Q1 t!1 CIi V1 4-� O W 1--� O �L W F+ O. 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(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. ntyoz�:co��miKoo��.o�t.w Fo��wa 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 18 J L7 v 8 O W J i0 N H 6 0 W C7 } x 0 4 a- .J H Q 0 r� 61 Jun 81 Jun 88 Jun 15 Jun 22 Jun 29 Jul 06 Jul 13 Jul 20 Jul 27 ORTES; 06101/2602 to 08/01/2082 23:59 Download a presentation -quality graph Parameter Code 00300; DD 13 httn•//nr aintP,ri IA-9,4A -,4-1'2 nMnn 9-4+o n'2n4n-7n . 01r%I Inn^- 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 12 10 ti to 0 W J $ N H C ,W 6 (a x 0 J QH 4 O 2 1 _ _. 1 i f I i I I I Jun 01 Jun 08 Jun 15 Jun 22 Jun 29 Jul 06 Jul 13 Jul 20 Jul 27 ORTES*. 06/01/2002 to 08/01/2002 23:59 Download a presentation -quality graph Parameter Code 00300; DD 13 httn•//ni- AWQft r ] IA;?AA nn2nn P_,4.+---_n0Acn�n nn/nI innnn I -- ---.__ --____. ___,_ _ ..-__--u.> i- •. >ii>..iui.a.�.. 1ab'G 1 Ul4 .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 httn•//nr -- ...+../ /•... 9AA -A-1 ] O_l r _ a_Lawl O_____7 _ -1 _4n O_ _ _ - A i-^ nn I- • • i : i - v -I.. i "6L. G V l 't 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� Questions about data gs-w-nc- NWISWeb Data Inquiries @us s gov Feedback on this websitegs-w-nc NWISWeb Maintainer@usgs.gov Return to top of--W e httn•//nr .z,.ro,-A-+, ,, .,..../ /,,..7 to -A-112 1 f• skip navigation 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 Questions about data gs-w-nc NWISWeb Data Inquiries@usgs.gov Feedback on this websitegs-w-nc NWISWeb Maintainer@uses gov Return to top of sae 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.: Questions about data gs-w-nc__NWISWeb Data Inquiries@usgs gov Feedback on this websitegs-w-nc NWISWeb Maintainer@usgs.gov Rehun to top 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F rrrrrrrrr1+1+F�rrrrr-I+rrrrrrI- � I I n v- r 0 H o- o- o o' o-o- o- o- o a o' CD, o' Cr a o 0 0' o o- a o-0- r �' <- 1 I m z 1. 0- Q O. 0 0 0- C, o_ n. n o. D. 0. 0- O n O. Q o.O. 0 0 0. 0 I. — I 1 a 0 Hv t o00>PfD, 0000a000000-oo-a.00 r f>N-cn 1 - - I •3 W I O O O O O o 0 0 0 0 0 0 0 0 0 O 0 0 Cl 0 0 0 0 0 1 O w H Q H 3 H C> o O -1 00 O If O N �1 O 0 N T • J TO • M I 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 IHOUSEITOTALI LAKE I TAIL I RIVERI DISS I READ I M-- r1- I AUX rbiH IGROSS AUX I GEN IrAUX I NET IYET I NET I NET IGROSS I AUX IUNIT IUrfIT IUNIT I GEN IPLANTI LEVEL WATER 1.3 Org 1 02 1 ---- -------------------------- --- I 121aH Mrl}9 I 14TaH ---- I rfvrH I ---------------....-------------------------------------------------------------------------------------- M14H I M" 1111aH I )fWH I 1414H I MWEl I DSF I DSF I DSF I DSF I DSF I FEET I FEET I CFS I PCT I 01:00 02:00 6 7 0 0 0. 0 0 0 0 0 0 6 0 0 6 5 0 8 0 0 0 8 2249.7 1386.1 0.0 0.0 03,00 6 0 0 0 0 0 0 0 0 0 0 7 0 0 7 7 0 8 0 G 0 8 2249.7 1386.1 0.0 0.0 04:00 6 0 0 0 0 0 0 0 0 6 0 0 6 6 0 B 0 G 0 6 2249.8 1386.1 0.0 0.0 65:00 6 0 0 0 Q 0 0 1 6 0 0 5 6 1 B 0 0 0 6 2249.8 13&6.1 0.0 0.0 06:00 7 0 0 0 0 0 0 0 6 0 0 6 6 0 B 0 0 0 8: 2249.8 1386.1 0.0 0.0 07:00 6 0 Q 0 Q 0 0 0 0 7 6 0 0 7 7 0 B 0 0 0 8: 2249.8 138!6.1 0.0 0.0 08:00 3 0 0 0 0 0 0 0 0 0 6 6 0 B 0 0 0 8: 2249.9 138:6.1 0.0 0.0 09:00 3 0 0 0 0 0 0 3 0 0 3 3 0 6 0 0 0 6 2249.9 1386.1 0.0 0.0 1.0:00 3 0 Cl 0 0 0 0 0 3 0 0 3 3 0 6 0 0 0 6 2250.0 1386.1 0.0 0.0 11:00 3 0 0 0 0 0 0 0 3 0 0 3 3 0 6 0 0 0 6 2250.1 1386.1 6.0 6.0 12:00 25 0 25 0 0 0 0 0 3 0 0 3 3 0 6 0 0 0 6 2250.1 138:6.1 0.0 0.0. 13:00 36 0 36 0 0 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 "0 1v to fD m W W N N N N vICO POWIONOF-I H0 I FAlDOl010100o10V1001 V IJ I N W is P cn V 00 F-` 00 W t l0 l9 1.0 l0 O l0 w I I l0 I . I Oo I O 1 {� 1 1 00• l0• Co. ��N• I I I I • IT • W A a) 61 al tT N F� I w FJ V V 00 00 �l01i(D' �' 1II III lN0V• lN0' �' �. 1 J. 00• V• 1 NNP0 l0 I II I1 lfl 0 F0a 11I � NI0--0 I 00 00 00 l0 00 00 00 I I I I p p tft O V A 1 .a J. LO V V 00 00 V V N l0 W F� a1 t1t C0 V 00 00 00 f V O O O N O to to tr Ol p !1 ;t X V V V Ol IT N t.J't O 00 l0 V V •P F-' V W V O V W rt V 00 00 00 00 00 00 O0 V is 00 l0 00 00 00 V 00 00 l0 O 00 V 00 t,n V V M V V V W F' l0 O W N V V N W V 01 V V 0-1 l0 V ',1V V 00 V O0 V l0 00 O is V V t0 00 00 O 00 O V v V N 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 2,230 1 111111IIIIII111111IIIIII111111IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII111] IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII111111111111111111111111111111111111111111111111111111111111111111111111111 1 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 ��'•^' 1. tom. ,, { ! �• � jl. -. ` '' f{� �; _. . /� �`i, •'i tea. r•. i,' P00 '. � _� , ram` ��'i�; �.-�� 1 „` �.. `� � • tt. .:�•'. '1,-. '_ vex � "Ml. ;,• r ��1 . .• -. a, - ��• ,, a r, !.•, - � , � .. � : "ate p7 .�, . :tea 1� • ;'. ' �- �«•� � .:c' •R ve .. . �`* ,f,:.►a« . is f YY��ld�`Yt�. •. r f# ►ur �v'.s ��••!�,x � • �`-�3'�s ••f•L. ��'�tS;n }?. � . ,. •_a.� ;'°". �, � �,, c .�r G..� *� L., �,' ..� s mar k. �4 �"ii , Ad 1`��. 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" �i' i;n ' .�i .�►., 'wc•1 �M .oi+�, is =III i� ' • "� ..a� �� •� Wx_': Ir mall '�� , ' w � � {tt a ` �. r +f. � _yJA�/►A� `.!J ''I• I�/' fr/�-.•;` � - .y yY .'�.a�^,�-,:i .:' or" 44 it I !vr r Alf. It Jill IV !!Tg. IV �ffi.j '4�14 14: .,fit f T., jr wr Az .41 Fj ANtId do ` f . TM NO, V ` ` 4 1 Ij-•_ N•5 f"'—` ;t: .. _.. s `r•' Y 'K. �' vt.r _ �J•�-'''S'�•'�•��t��-,��• � � �f .��iy-�� • �� .`ice Middle Segment Riffle/Run Complex Transect M-5 Flow -> Poor Photo Quality Middle Segment Riffle/Run Complex Transect M-6 Flow > 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 ti ►•,' ., �,ry , �..i,'; ;^ .S ' _y.�G�,�.:;w• f: �w ��"" . ,"' .+.> ,, :: •�}w,' •� f •a � i`T�. � `� �- � r - •�'. 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( ', ,/' fill .� .r y+T,_ ,,,,, �Z;, �. , ( '�� `+�., ., +'ram 1 : �� : • ' 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