ML18139B106

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Nonradiological Environ Monitoring Rept for 1980
ML18139B106
Person / Time
Site: Surry  Dominion icon.png
Issue date: 02/24/1981
From:
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML18139B105 List:
References
NUDOCS 8102270661
Download: ML18139B106 (50)
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4. 13 NON-RADIOLOGICAL ENVIRbNMENTAL MONITORING PROGRAM The non-radiol_ogical environmental monitoring program applies to the monitoring of the temperature-salinity distribution and the biological variables in the 10-mile segment of the James River Estuary centered at Hog Island. The program is conducted in order to (1) further characterize the relationship between the thermal discharge and the physical-chemical characteristics of the water mass within the 10-mile tidal segment of the James River; (2) further verify the continued efficiency of the Ristroph traveling fish screens; and (3) monitor the fish populations in the James River utilizing the data collected from the haul seine and otter trawl samples.

Reporting of data from the Ristroph traveling fish screens is required only in the event of mortality exceeding 25% and then directly to the Region I I Office of Inspection ~nd Enforcement.

, * * *, - . _ , * * , . - . - - ~ *** *-* **** , - ** * ~ * *# ----- * ,~ * * * - 6 * **** ~~~---*,7,, ....

(_

e 4.13.A.1 TEMPERATURE AND SALINITY MONITORING 4.13.A.1.1 METHODS This program is conducted at monthly intervals using boat cruises along the scheme illustrated in Figure 4.13.A-1. Sampli~g starts along the lntakes-Skiffes Creek transect just before low slack water, proceeds upstream, and concludes with the Jamestown Island-Crouches Creek transect. At each station temperature and salinity are measured at two-meter intervals from surface to bottom.

4.13.A.1-1 RESULTS Temperature and salinity measurements are shown in Figure 4.13.A-2 through 4.13.A-25.

e e Figure 4. l 3.J\-l TEHPER.ATURE AtlD SALINITY.

HONITORING STATIONS t

-N-I

.,,., ~'

6 ' ',

,~ '

_L;{"' ',,

A8 ,/' 7 ',

I I

,,' 'Y'. 5

,_,,' \

t5:-'

, 9 I

HOG ISLAtlD

\\

I I \

~10 \\

\

\

\

\

\

6----6---1 --~-----6 4 3 2 I SURRY PO\.JER STATION 0

....___.._..._._.,_,._...........___ _ _ _...L.._ _ _ ____, 2 Nauliccl Miles JA'-\ES RIVER 1000 0 IOOO 2000 3000 Yards LEGEND:

6 Monthly Salinity - Temperature Profile Station*

o Near Surface Te~perature Honitorir.g Station Boat Cruise

JAMES RIVER JAMESTOWN ISLAND TO SKI FFES CREEK I

3.4

3. l 13.4 e

I 3,0 I 3.4 2 3. 31 I 3, 0 I 3. l '3. 3 I 3, 4 .,,

Cl) 1 3. I 3. lf -*

(.Q l

a:: 1 3. I 3, 4 C

w 4 (0 f- .-!="-

~4 3,31 I 3,0 I 3. l 4 FLOOD I 3. 3 I 3, L1 I 3.4 v .l c?

EBB'" I 3 .4 J>

I I 3. l r-.>

z I 3. 4

3. l
r: I 3.4 t- 6 3. 31 I 3.0 13. l I 3 .,3 I 3.4 Q.

lLJ Q

3,3 I 3, lf e

I 3,5 8 3.0 I 3, l

3. l 0 0*5 1*5 2 TEMPERATURE (°C) 3.0 AT MONITORING STATIONS 10 NAUTICAL MILES January 1980

JAMES RIVER JAMESTOWN ISLAND TO SKI FFES CREEK 2.0 0 .o ' I 2.0 I .0

  • 1. 4 2 .0 I I .0 *. 1 I. 3 I J.] "'Tl Cl) 5 lO I .0 I ].

C a:: I 2.4 . (1) w I I]. 9 I- 12. lf

.J::-

w 4 .0 I I .0 I*1 Flood 2.7

~

\N

~

I .0

"'2 Ebb

.. '* 4 I 1. 1 I 2. 3

):>

vJ I

z I 2. 7

c 6 .0 I .o I .0 1.2 1. 1 13.4

.e I

I- '* 7 a.. I 2. 5 w

0 8 .o , .2

.8 13.9

.2 0 0*5 1*5 2 SALINITY ( ppt) 10 .o AT MONITORING STATIONS NAUTICAL MILES January 1980

JAMES RIVER JAMESTOWN ISLAND TO SKIFFES CREEK I

2, 1 e

"Tl I 2.0 -,

  • 1, 8 ro I. 6 I 1. 7 r 2. 2 I 2, 2 ......

.i:-

2 I]. 7 I I 2,] \JJ en I 1. 8 12.0 )>

I a: I 2.0

.i:-

w I 2. 5 I- I 2, 2 7 I 1. 7 FLOOD

~4 1. 6 I 11.

4r? I 2. 2 I 2.] 2.5 12.0 I 1. 7 EBB"'

z 2.0

1. 7 J: 1 2. I I- 6 1. 6 I 11. 7 I 1. 7 I 2.] I 2.0 a.

w 0

1. 7 2, 1 e

8 1. 7 2. 1 I. 7 0 0*5 1*5 2 TEMPERATURE (°C) 10 NAUTICAL MILES AT MONITORING STATIONS February, 1930

!f JAMES RIVER JAMESTOWN ISLAND TO SKIFFES CREEK 2.4 0 5

.o I 1. 7 I .0 1

2. l 2 .0 I *.o I ' l I .6 I 1. 7 .,,

U) I .2 I 1.]

(Q a: .,

C:

CD w I 2.0 I 2.6

..... -1:-

w

4 .0 I
  • .o I . l Flood .6 1 2.2 . -

I.,.)

-4 c?. I I 1,8 2.2 I 2.0

)::,

I I .2 Ebb VI z

.2 1

c

..... 6 .0 I 1,0 I *l I .6 I 1. 8

2. 5
a. I 2. l w

a 8 .0 I .l

.6 12 ,5 0 0*5 1*5 2 SALINITY ( ppt)

.0 "

10 AT MONITORING STATIONS NAUTICAL MILES Febrnary, 1980

~ I 1.. .

JAMES RIVER JAMESTOWN ISLAND TO SKIFFES CREEK 2.6 2.2 12 .2 I 2. 5 e t 2. 1 r 2. 2 2 2.61 12. 7 I 2. 0 1'2 .2

-11 en 12. 5 12.2 -*

lQ a:: I 2.2 I 2. 3 C

w *2.2 (l)

I- I 2.0 .i:-

2.61 I 2. 0 FLOOD ~

~4 12. 7 4 I 2 .2 I 2 .0 2. 1 '-"-'

c?

EBB~ *2.0 )>

I

12. 4 z 2.0 I 2. 3 C1' 2.4 I 1. 9

~6 2.61 12. 7 I 2.0 I 2 ;2 a..

w Cl 1 l. 9 e

I 2.0 8 2.51 2.7 I 2 .0 2. 1 2.0 0 0*5 1*5 2 TEMPERATURE (°C) 10 NAUTICAL MILES AT MONITORING STATIONS M~rch; 1980

JAMES RIVER JAMESTOWN ISLAND TO SKIFFES CREEK 2.2 0 5 0.0 I l. 1 I 0.0 e

  • 1. 8 2 0.0 I I 0.0 I 0.. 0 I 0.5 I l. 3 -.,

en *o.o I ]. 8 lC a: ,

C I 1. 7 I 2. 3 (\)

lLJ

....LLJ I 0.0 1 2.2

~

4 0.0 0.0 Flood 2.2 l.,J

~

I I 0.0 I 0.5 I 1. 6 1 0.0

""'2~ I I 1. 9

>I Ebb --..i z I 3 .6

r: 6 0.0 12.4

....a. 0.0 I I 0.0 I 0.0 I 0.7 I 1.6 I 2. 1 w

0

a. 0.0 0.0 0.9 13.2 I 0.0 0.0 0 0*5 1*5 2 SALINITY ( ppt) 10 AT MONITORING STATIONS NAUTICAL MILES ,,

March, 1980

JAMES RIVER JAMESTOWN

  • 1sLAND TO SKIFFES CREEK
11. 9
11. 3 I 11 , 5 I 11. 8 e I 11. 3 .,,

2 11, 41 I 11

  • 5 I 11. 3 ' 11. 6 I 11. 2 -*

lQ C

u, I 11 . 2 *:fl. 2 -,

(1) a::

w I 11 . 4 111. 4 I 11 . 8 ......

J:-

f- I 11 , 3 .

w I 11 , 5 I 11. 2 .,.FLOOD 11. 4 )>

~4 11. lil I 11. 6 I 11 , 2 I

~

E 88,._ I 11 . 2 co I 11. 2 z 1 11. 7 I

11. 2

~6 11 . 41 11.2111.3 I 11. 2 I H.~ I 11 , 2

a. I 11. 2 w

C

11. 4 11. 2 I 11. 2 8 11. 3 . I 11 . 1
11. 3 0 0*5 1*5 2 TEMPERATURE (°C) 10 NAUTICAL MILES AT MONITORING STATIONS
11. 3 Apr (1 , 1980

' . /'

- I JAMES RIVER JAMESTOWN ISLAND TO SKI FFES CREEK

  • 1 .0 0 5 I *1 "'Tl
  • 1 ro I
  • 1 *1 I
  • 1 .....

.j::-

I 2 *1 I

  • 1 I
  • 1 *- *1 I
  • 1 w

)>

Cl) I I

  • 1 I
  • 1 \.0 a:: I . Q w I *1 I *1 I- 1 w 4 *1 I I
  • 1 I *1 Flood I I *
E ""c? ... *1 I *1 *1 I
  • 1 I *1 Ebb z I .6
c 6 I
  • 1 I *1
  • 1 I .1 I *1 I I- *1 I
  • 1
a. I
  • 1 w *1 0

8

  • 1 I *1
  • 1

.1

  • 1
  • 1 0 -0*5 1*5 2 SALINITY ( ppt) 10 AT r~ONITORING STATIONS NAUTICAL MILES Apri 1, 1980

- I JAMES RIVER JAMESTOWN ISLAND TO SKI FFES CREEK

21. 4 I 21. 3 12]. 3 e

t 2 l. 3 r 22. 2 -n 2 21.01 I 21. l I 21. l 121. 5 -*

\0 I 21, l

(/)

I 21. 5 ,

C a:: 121. 7 I 2 l. 9 CD w .t:-

I- 12 l. 2 .....

w 21.0, r 21. l I 21. 1 FLOOD

~4 4c? I 21.9 121. 4 21 .Lr )>

I I 21. l __.

120. 9 E es"' 0 z 20.9 12 l. 2 20.9 I 2 l. 2

~6 20.9, I 21. 0 I 21. 2 I 21. 7 ,21. 4 Q.

w 20.9 21. 2 0

I 20,9 8 21.0 21. 6 2 l. 0 0 0*5 1*5 2 TEMPERATURE (°C) 10 NAUTICAL MILES AT MONITORING STATIONS

~1ay, 1980

JAMES RIVER JAMESTOWN ISLAND TO SKIFFES CREEK

,9 0 5 I

I 1. 0

  • 1 I .e *r, 2 ,0 I I ,0 I * ] I .4 I
  • 7 lD Cl) I , 1 I .6 C a:: 1. 0 I 1. 3

(])

w I ..:-

I- w w 4 Flood I ,9

,0 I .0 I *I 4 :r:,

~

I

... 2 ... I .

I . 7 I .0 I .8 .....

I I . I Ebb z , I. 5 I I. l

r: 6 ,0 I .l I .o I .Q 1
  • l1 7 I- I ,

a_ 11.]

w 0

8 I 1. 4

,QI .o I .0

  • Li 0 0*5 1*5 2 SALINITY ( ppt) 10 .0 AT MONITORING STATIONS NAUTICAL MILES May, 1980

JAMES RIVER JAMESTOWN ISLAND TO SKIFFES CREEK I

25.4 25.3 125. 4 I 25, 5 25,0 I 25,3 2 25, 3 I I 25, 4 I 25, L: r 26. 1 i 25. 5 .,,

25,5 I 25, 3 -*

(.Q V, 125.3 C 0:: 125. 2 (1) w I 25, 3 I-

~4 25, 3 I I 25,4 125.4 FLOOD I 25. Li I 25, 2 25.0 I 25, 3 -

"c? )>

z 125.3 EBB'"

I 24,9 125. 2 N

I 25*. 3

c I 25, 2

._ 6 25, 3 I I 25, 4 125.4 I 25. 2 I 25, 2

a. I 24. 8 w

a I 2Ll, 9 8 25, 3 I 25.4 125, L, 25, 1 25.4 0 0*5 1*5 2 TEMPERATURE (°C) 10 NAUTICAL MILES AT MONITORING STATIONS*

June, 1980

JAMES RIVER JAMESTOWN ISLAND TO SKIFFES CREEK 2.0 0 5 I 0, 7 10.2 I ] ,6 2 0, l I 10. 1 I Q, 2 I 0. 4 IQ, 7 "Tl tO Cl) I o. I *,I. 2 .,

C ro 0:: I 2,6 lJJ I ]. ] .i:-

.__ 10.2 I J.9 w lJJ 4 Q,] I Flood

IQ,] I 0. 2
  • 2 .. I 0. 3 I 0. 0 l. 2

'11. 8

i:,,

I I 0,] Ebb w z I 3,Q

c 6 Q,] I o. 1 IQ, l I 0. 2 I 0. 3 I 0,9 I 2,0 a.

w

!3,3 e C

I 3,9 8 o. I I 0. I I O.2 0.3 0 0*5 1*5 2 SALINITY ,,

( ppt) 10 0. I AT MONITORING STATIONS NAUTICAL MILES J~ne, 1980

., . I JAMES RIVER JAMESTOWN ISLAND TO SKI FFES CREEK I

26.8 27 .0 I 26.9 126.6 e 126. 7

26. 7 126.8 r 27. 0 27, 2 2 26. 71 I I *71 u, 26.9 I 26,9 tC 127. 1 C 0::

127. l *26.6 '

(0 w

.... 126. 7

~

126.8 FLOOD l.,.J

~4 26. 71 I 26. 6 4c? I 27. 0 I 27.0 27.0 I 26. 6

_.I 126.8 EBB~ ....

z 26.G 27.0 26.6 126.6

c 126.6

.... 6 26.61 I 26. 6 126.8 I 27, 0 a..

w a

8 26.61 26,7 126.8 27.0 126.6 26.7, 0 0*5 1*5 2 TEMPERATURE (°C) 10 NAUTICAL MILES AT MONITORING STATIONS July, 1980

JAMES RIVER JAMESTOWN ISLAND TO SKIFFES CREEK 5, l 0

I ] , 8

1. 6 13. 2 *5.6 ,,

2 l. 51 I 12. l I 3,9 -*

lO Cl) 12.0 I 5, 4 C a:: (1) w I l. 8 15.6 15,7 -

I- 15.8 w 4 1. 61 12. l Flood

\.,J

~

I ]. 9 I 3, 2 4 5,7

)>

~2~ I lf.

I 5,6

_.I I 2. 2 Ebb Vl z 15,8

c 6 16.0
l. 7* 2.2 I 1.9 12. l I- I 3, 2 I 4.4 a.

w Q

I 5. 7 e

8 2.0 3.2 16.o

l. 71 12. 2 0 0*5
  • 1*5 2 SALINITY ( ppt) 2.0 10 AT MONITORING STATIONS NAUTICAL MILES July, 1980

JAMES RIVER JAMESTOWN ISLAND TO SKIFFES CREEK I

30. 1 130,3 130.2 130.4 I 30. 7 2 30, 1 I I 30. 1 I 30. 0 I 30. 8 ""Tl en I 30. 2 130.3 tO C

a: ,30.2 *ro w I 30. 5 -~..

130. 2 t- 130. 1 ~

l..,.l 30, 1 I 30,0 30, 1 FLOOD

~4 I I 4r? I 30. 7 I 30

  • 5 30. 1 130.2

)::,

I I 30, 2 EBB'" ~

er-z 3Cl,5 130. 1 30,5 J: 130. 1

.... 6 30, l I I 29,9 I 30;0 I 30, 5

a. 130.0 w 30.5 a

130,0 8 30, 1 I 29.9 I 30. 1 30.0 0 0*5 1*5 2 TEMPERATURE (°C) 29.9 10 NAUTICAL MILES AT MONITORING STATIONS August, 1980

JAMES RIVER JAMESTOWN ISLAND TO SKIFFES CREEK 8.3 0

e 13,8 I 8,4 ..,,

2 3. 1 I 1 3,5 1 L1, 4 I 5. 7 7,0 I

,a CJ) I 3, 7 18.3 C a:: *

(1)

I 8. 2 I] 0. 1 .~

....w w 4 13.8 I 8. 5 3, 3 I 13.6 I 4. 4 Flood 5, 9

E* ... 2 .. I I 7* 5 8.2 19,5

)>

I I 3, 8 Ebb -...J z 111. 1

c 6 4. 1 13.8 I 8. 7 3*7 I

.... I 4. 5 I 5. 8 I 7, 5 a.

w 0

19,9 e 8 I 9,0 3, 7 I 3,9 I Lf. 6 5.8 4.7 0 0*5 1*5 2 SALINITY { ppt) 4.o 10 AT MONITORING STATIONS NAUTICAL MILES August, 1980

JAMES RIVER JAMESTOWN ISLAND TO SKI FFES CREEK I

26.5 126. 4 I 26. 7 I 27 .0

26. s, 26. 7 27,] r 26. 8 2 I I '127.0 -..,

(/) I 26. 8 L'.)

I 26. 7 i::

a:;

  • 26. l *

(D 127.2 w

I- 127. 0

~4 26. 8t I 26,9 I 27. 1 FLOOD I 26. 8 ,27.0 27.0

\.i.J I 26.9 "c?

EBB"'

I 26. 8

~

~

I co z '26.o

c 127.0 I- 6 26.91 26, 9 I 2 7, 0 I 27. l I 26. 8 127. 0
a. I 26. 8 w

Q

, 27. O 8 26.9, 27.0 I 27. 1 26.9

27. l 0 0*5 1*5 2 TEMPERATURE {°C) 10 NAUTICAL MILES AT MONITORING STATIONS September, l 980

JAMES RIVER JAMESTOWN ISLAND TO SKIFFES CREEK 10.6 0 5 I 9, 5 e

I 6, 8 1

18.6 10. 8 2 6. I 1 I 6. 3 I 7* 5 I 9, 8 lQ "Tl Cl) 17, I I JO, 7 ,C a:: I. 2 111. 5 (D

w I]

......-'='"

l 0.9 w .

w 4 6.3, 6.6 I 7.5 Flood 13,6 1

E I

.. c? .. IJO, I 11. 3

10. 7 2...

17, 5 Ebb I \!)

z 112. 7

c 6 110.9 6.6, 7,8 6. 8 7,5

..... I I 18.7 110. 3

a. I 10, 7 w

0 8 110.9 6.61 7.0 I 7. 5 8.7 7,5 0 0*5 1*5 2 SALINITY ( ppt J 10 AT MONITORING STATIONS NAUTICAL MILES Septer;1ber, 1980

JAMES RIVER JAMESTOWN ISLAND TO SKIFFES CREEK I

18.9

18. 8 I l 8,9 I ]8,9 e I 19, 2 18.91 r 18. 9 ..,,

2 1 18.9

  • 18.9 I 19, 2 en I ]8, 8 18.9 1
19. 1 l!)

C a:: 19,Q w 119. 3 I (D

.r.:-

I- I 19, 2 -~

FL00D 18,91

~.

l.,J

~4 I 18.9 11 s.9 4 I 19, 0 I 19, 1 19, 3 ;i:,

11 ~l. 3 I I 18. 8 t->

z I 19, 0 0

18.9 19. 3

c 18.91 I 18.9 I 19, 2 J-6 119.0 I 19', 0 I 19. 2 a.

w a

I 19, 2 e l 0.91 18.9 119 .o 19.0 18.9 19. l 0 0*5 1*5 2 TEMPERATURE (°C) 10 NAUTICAL MILES AT MONITORING STATIONS October, 1980

JAMES RIVER JAMESTOWN ISLAND TO SKIFFES CREEK

11. 9 0

e

  • 8. l I 12, Q a.i1 2 7* 2 I I 7,5 I b, 5 I 9. 5 I 11 .Q -*

(u en I 7,5 I 11.6 .,

C Cl>

0::

w 18. l I 11 ,9 I 12. 8 -

I- 12, 2 w

~

w 4 7* 4 I 7.G Flood 9, 5 I

I 8.6 )>

~

I c? .. I I 11. 3 l l.9 I 2

I 7,3

-4 Ebb I 12.0 I 13', 3 l->

I 12, 3

~6 7, 6 I 8. l I 7,8 I 8. 7 I 9, 6 11, 5 I- I a.

w C)

I 12. 3 e 8 I 12. 5 7, 7, 7.8 I 8. 7 9.7 8.7 SALINITY ( ppt) 0 0*5 1*5 2 10 7.9 NAUTICAL MILES AT MONITORING STATIONS October, 1980

JAMES RIVER JAMESTOWN ISLAND TO SKIFFES CREEK I 9, 7 I l O, L: 10,2 I I 9,7

10. I r 9.8 9, 8 .,,

2 9, 8 I I 10. 2 1 I fl) :1 9, 7 lC

  • 10.0 10.~ i: .,

C 0:: I 9, 7 . ro w I 9,8 1- 9. 8.. I 9,9

~4 10.2 I I 10. 2 I IO. l FLOOD

.c? I 9,8 I 9 *9

, 9 ,9 )>

I I 9,9 EBB"' I',)

z 10.0 110.0 N

9,9 10. l

c 110, I I- 6 10.2 I I 10.2 110.-2 I 9-, 8 a.

w 0

e 110.0 8 10.2 I 10.2 110 .2 l O. I) 0*5 1*5 2 TEM;:PERATURE (°C)

I 10 NAUTICAL Ml.LES AT MONllORING STATIONS

'I.

.av.em " b er, 1980

JAMES RIVER JAMESTOWN ISLAND TO SKI FFES CREEK

11. 8 0

I 9, 2 6, 6 9,2 I 12, 3 -.,

2 I I 7. 8 I 8.8 I I 1 1 . L: -*

<O Cl) I 6, 5 *12. 2 .,

C a:: I 13, 3 (l)

.!=-

lLJ I 12.]

lJJ I 8.8 I 11:.. £ w 4 7. 1 I I /,9 I 9,7 Flood I 9,9 >I

~ .. c:? .. I 12, 4 12.8 1111, 2 N I 6, 7 Ebb

\.,J z I ] L,, 5

c 6 I 16,6

.... 7* 5 I 7.0 I 8.0 I l 'J

  • l I 10. 5 I ]lf. 3 a.

w a

1111. 3 e

8 I 17, 2 7, 7 I 8.2 I 10. 5 l (). 9 10.5 0 0*5 1*5 2 SALINITY ( ppt}

10 AT MONITORING STATIONS NAUTICAL MILES i!ovember, 1980

JAMES RIVER JAMESTOWN ISLAND TO SKI FFES CREEK 7, l I 7, 2 1--,

I' 1 *e I 6,9 6.9, 8.5 7 ,Q ...,

2 '7. l 1 7,2 ' I tO CJ) I 6,9 7.2 I 7 ,Q C a:: 1 7, l (l) w 17. ! -~

t-6.91 7, 1 17. 2 FLOOD 8.o 7,0 I 6. 9 -

\>J

~4 I I 7* 0 >I I 6,9 "c?EBB'"

I I 6,9 t>.l

~

z 6.9 6.9 16,9

r:: 1 6. D t- 6 6.9, I 7, 1 17. 2' I I 7 .0 T.6 a.

lLJ 0

6.9 e I 6. 8 8 7. l 17.2 7,3 7.2 0 0*5 1*5 2 TEMPERATURE (°C) 10 NAUTICAL MILES AT MONITORING STATIONS December, 1980

JAMES RIVER JAMESTOWN ISLAND TO SKIFFES CREEK 10.4 0 5 I 9,9 I 7, 9 I 11, 5

  • e I 11. 4 ...,

2 6. 11 I 7, l I 7*7 I 8. 7 I lCJ, l -*

(1)

C

(/) I 6, 2 I 11. 5 -,

CD 0:: I 11. 9.

LLJ 7,9 I 11 .2 .i::-,

....w I I ] 2, 5

~

l.,J 4 6. 4* 7, l 7,9 Flood )>

9, 0

~

I 6, 6 I I

... 2 .. I 110. 2 l l.9 I 12.6 N I

\J"l Ebb z I J3. ~,

c 6 7,2 I 13, l
6. 5* I 7, l I 8.0 I 9. 2 I 10, 7 I-a.

w 0

I 13, 3 e

8 I 13,6 6.9 7.2 I 8. 0 9 .1+

8. ()

0 0*5 1*5 2 SALINITY ( ppt) 10 7,4 NAUTICAL MILES AT MONITORING STATIONS December, 1980

/

e e

4. 13 . A. 2 CONTINUOUS WATER TEMPERATURE MONITOR I NG 4.13.A.2.1 METHODS Mid-depth water temperature is measured in the intake canal at the high-level screens and in the discharge canal at the groin as illustrated in Figure 4.13.A-2. Temperatures are recorded continuously on Taylor circular chart recorders located at each point. Charts are changed weekly and temperatures digitized using a Hewlett-Packard 9864A digitizer.

4.13.A.2.2 RESULTS Monthly mean values of the daily high, mean, and low values at each location are shown in Table 4.13.A.2-1.

e e TABLE 4.13.A.2-l JAMES RIVER TEMPERATU~E DATA VA!...UES ARE MEMIS CF DAILY HIGH, :*:C:Ml, Mm LO:.l VALU::S A~:lUAL REFCRT FCR 1930

  • ---------------------------------- YEAR-so HONTH-1 ------------------------------------

TYPE S.A3GRT SE2WT HIGH 12.5 5.9 MEt..~l 11.6 5.3 LO:-l 10.7 4.6

  • ---------------------------------- YEAR-BO HOliTH-2 ------------------------------------.

TYPE SA3GRT SE2UlT HIGH 9.4 3.6 MEMI 8.5 3.2 LOfl 7.6 2.7

  • ----~ ------- -------------------- YEAR-80 HONTH-3 ------------------------------------*

TYPE SA3GRT SE2INT HIGH 8.9 8.8

~1C:A~l 7.6 7.8 LG:~ 6.9 7.2

YEAR-BO MONTH=4 -------------------------------------

TYPE SA3GRT SE2INT HIGH 17.3 16.5 HE.t..N 16.1 15.7 LO.~ 15.3 15.l

YEAR-80 MONTH-5 ------------------------------------

TYPE SA3GRT SE2INT HIGH 27.5 22.1 McAtl 26.1 21.1 LCI 24.9 20.3

YEAR-so MONTH-6 ------------------------------------i TYPE SA3GRT SE2INT HIGH 32.5 25.7

~1::A!l 30.8 24.8 LO:~ 29.4 2<;. 0

TABLE 4.13.A.2-1 lCONTINUEO)

JM!ES RIVcR TEMPER,\TU?.E DATA VALUES ARE HUNS Or O,'..Il Y HI3rl, ~:EAN, Atm LOW VALUES NltlL'.c; !.. REPORT FOR 1930

  • ---------------------------------- YEAR=60 t10:nr1-1 ----------------------------------- ..

TYPE SA3G!:1T SE2I}lT HIGH 35.7 28.7 ME/i.N 34.1 27.9 LOW 32.8 27.3

  • ---------------------------------- YEAR=60 HC:-ITH-e ------------------------------------

TYPE SA3GRT SE2!NT HIGH 32.9 2-'3.4 Hc:AN 31.4 27.7 LC:.l 29.9 27.2

  • ---------------------------------- YEAR-80 HCNTH-9 ------------------------------------

TYPE SA3:0RT SE2!NT HIGH 34.6 26.7 tEAtl 33.5 26.1 LC:./ 32.5 25.6

  • ---------------------------------YEAR-SO MONTH-10 ----------------------------------.

TYPE SA3GRT SE2Uff HIGH 26. 7 18.2 tlE),N 25.8 17.6 LOW 24.9 17.0

  • ---------------------------------- YEAR=80 HONTH=ll ------------------~----------------.

TYPE SA3GRT SE2nlT HIGH 19.0 10.9 t!EAN 113.1 10.4 LO(~ 17.2 10.0

  • ---------------------------------- YEAR-SO HONTH-12 -----------------------------------

TYPE SA3GRT SE2INT HIGH 14.7 6.2 HEAN 1r,. 0 5.7 LOl4 13.5 5.3

Figure 4. 13.A.2-2 BIOLOGICAL SAMPLE STATIONS t

-N-I FLOOD

~

EBB HOG C:::; ISLAND su~~o STATION

,JAMES RIVER 0 2 Nautical Miles I O 2 3 11 11..un..uP.LJ**u..1--..J.....----JIL..----11 KII om et e rs 0 Trawl D Seine

e e 4.12.A.2.3 DISCUSSION Comparison of temperature data is most practical for the postoperational period. Monthly means of daily mean intake temperatures were within or near 0 0 0 1.4 C except for March (-2.6 C) and November (-2.4 C).

Discharge temperatures (monthly means of daily means) followed no discernable pattern. Temperatures were lowered as much as 8.8°c (from the overall postoperational mean) during February, March, and April when the station was off line. Otherwise, the means were within or close to 2°c except for September and October when they were raised about 3°c. September intake temperatures were about l.5°c warmer in 1980. The October discharge temperatures differed slightly more but were within allowable limits.

e e 4.13.A,3 CONDENSER-COOLING SYSTEM CHLORINATION Chlorine was not used in condenser cleaning and therefore no monitoring was performed.

4.13.A*.4 CHEMICAL RELEASES TO THE COOLING SYSTEM These data are reported monthly.

e I

4.13.B FISH SAMPLING 4.13.B.1 MONTHLY BEACH SEINE AND OTTER TRAWL SAMPLING 4.13.B.1.A METHODS Sampling is conducted monthly at one otter trawl station located off the low level intakes and at two beach seining stations located immediately upstream (Intake N) and downstream (Intake S) of the low-level intakes (Figure 4.13.A.2-2). The trawl sample is taken by towing a 3.1 m (diameter at mouth) trawl of 6.4 mm bar mesh in the cod for 10 minutes starting just off the low-level intake structure with an ENE heading. The beach seine samples are taken using a 15.2 m wide x .1.8 m deep x 6.4 mm bar mesh seine that is first stretched perpendicular to the shore, hauled 100 m and then brought ashore.

Samples are usually preserved immediately and then taken to the laboratory for identification and measuring. Occasionally, when large or unusual fishes are caught, their catch is noted on the field sheet and they are immediately released.

4.13.B.1.B RESULTS Data for the monthly seine and trawl samples are shown in Tables 4.13.B.2.B-1 to 4.13.B.2.B-12. A total column for the two seine stations is provided also. The tables show the catch for each species, the total catch of all species, the number of species for each station, and the diversity estimates H-Prime, Evenness, and Richness.

e Table 4. 13.B.2.B-1 S'JRRY POWER STATION CATCH BY SPECIES AMO DIVERSITY ESTIMATES BY HONTH FOR 1980 PLEASE SEE FIGIJP.E 4.13.B.2-2 FOR STATION LOCATIO/IS JANUARY 1----------- SEINE ----------1 TRAWL IHTAKE IMT!.KE TOTAL SOUTH NORTH DOROSOHA CEPEDIANUM l. 0000 ICTALUP.US CATUS 1.0000 ICTALL?.US PUNCTATUS 1.0000 MICR.OPOGONIAS UNDULATUS 1.0000 1.0000 MCP.Ol'IE AMERICANA 10.0000 HCP.Ol'lE SAXATILIS l.GCGO TRINECTES MACULATUS 2.0000 2.0000 30.0000 SPECIES 2.0000 2.0000 6.0000 TOTAL FISH 3.0000 3.0000 44.00()()

H_PR!HE 0. 9183 0.9183 l.3588 EVEt~lESS 0.9183 0.9183 0.5257 RICHNESS 0.6309 0.6309 0.9158

  • Table 4.13.B.2.B-2 e

SURRY POWER STATION

_ CATCH BY. _SPEq_ES AND DIVERSITY ESTIMATES '?Y NCNTH FOP. 1980 PLEASE SEE FIGURE 4.13.B.2-2 FOR STATION LOCATIONS FEBRUARY 1----------- SEINE ----------1 TRAWL IHTAKE INTAKE TOTAL SOUTH NORTH DOROSOHA C~PEDIANUl1 1.0000 ICTALURUS CATUS 1.0000 1.0000 2.0000 NENIDIA NENIDIA 2.0000 2.0000 NORONE AMERICANA 52.0000 HORONE SAXATILIS 1.0000 l.0000 1.0000 NOTROPIS HUDSONIUS 1.0000 TRINECTES HACULATUS 92.0000 SPECIES 1.0000 2.0000 3.0000 6.0000 TOTAL FISH l.0000 3.0000 4.0000 149.0000 H_PRIHE 0 .. 0000 0.9183 1.5000 1.1884 EVENNESS 0.0000 0.9183 0.9464 0.4597 RICHNESS 1. 0000 0.6309 1.0000 0.6926

e Ta.p_le 4.13.B.2.B-3 SURRY POWER STATION CATCH BY SPECIES AND DIVERSITY ESTIMATES BY MONTH FOR 1980 PLEASE SEE FIGURE 4.13.B.~~2 FOR STATION LOCATIONS HAP.CH 1----------- SEINE ----------1 TRAWL INTAKE INTAKE TOTAL SOUTH NORTH ICTALURUS CATUS l.0000 ICTALURUS NEBULOSUS l. 0000 l.0000 ICTALURUS PUNCTATUS 2.0000 2.0000 2.0000 MENIDIA BERYLLINA 1.0000 1.0000 NORONE AMERICANA 10.0000 TRINECTES MACULATUS 68.0000 SPECIES 2.0000 1.0000 3.0000 4.0000 TOTAL FISH 3.000C 1.COOO 4.0000 81.0000 H_PRIHE 0.9183 0.0000 1.5000 0.794~

EVENNESS 0. 9183 0.0000 0.9464 0.3973 RICHNESS 0.6309 1.0000 1.0000 0.4732

  • T~ble 4. 13.B.2.B-4 e

SLIP.RY POWER STATION CATCH BY SPECIES AllD DIVERSITY ESTIMATES 8Y MONTH FOR 1980 PLEASE SEE FIGUF!E 4.13.B.2-2 FOR STA*TION LOCATIONS APRIL 1----------- SEINE----------! TRAWL ItlTAKE INTAKE TOTAL SOUTlf NORTH ALOSA AESTIVALIS 2.0000 2.0000 ANCHOA HITCHILLI 205.0000 14.0000 219.0000 8P.EVCORTIA TYRANNUS 8.0000 8.0000 um::OSCMA CEPEDIANUM 4.0000 1.0000 5.0000 ICTALU?.US CATUS 2.0000 ICTALL~US NEBULOSUS 2.0000 2.0000 ICTALURUS PUNCTATUS 8.0000 1.0000 9.0000 1.0000 LEIOSTOMUS XANTHURUS 1.0000 1.0000 LEPOHIS GIBBOSUS 1.0000 1.0000 MEN!DIA BERYLLINA 1.0000 3.0000 4.0000 r.nP.ONE AMERICANA 1.0000 1.0000 2.0000 2.0000 NOTROPIS HUOSONIUS 4.0000

  • 4.0000 TRINECTES HACULATUS 109.0000 SPECIES 10.0000 6.0000 11.0000 4.0000 TOTAL FISH 236.0000 21.0000 257.0000 114.0000 H_FRIHE- 0.9238 1.6277 1.0452 0.3265 EVENNESS 0.2781 0.6297 0.3021 0.1632 RICHN!::SS 1.1417 1.1384 1.2491 0.4391
  • Table 4.13.B.2.B-5 e

SL'F!RY PO~ER STATION CATCH BY SPECIES AtlD DIVERSITY ESTIMATES BY MONTH FOR 1980 PLEASE SEE FIGURE 4.13.B.2-2 FOR STATION LOCATIONS HAY

!----------- SEINE ---~-----1 TRAWL INTAKE INTAKE TOTAL SOUTH NO?.TH ACIPENSER OXYRHYNCHUS l.0000 ANCHOA HITCHILLI 257.0000 9.0000 266.0000 2.0000 BREVOORTIA TYRANNUS 7.0000 20.0000 27.0000 1.0000 DOROSOMA CEPEDIANUH 1.0000 l. 0000 ICTALURUS PUNCTATUS 2.0000 2.0000 2.0000 LEIOSTOMUS XANTHUP.US 81.0000 81. 0000 53.0000 HEHBRAS HARTINICA 12.0000 12.0000 HICROPOGONIAS UNDULATUS 3.0000 HORONE AMERICANA 1.0000 1. 0000 9.0000 NOTEM!GONUS CRYSOLEUCAS 1. 0000 l.0000 POMATOHUS SALTATRIX 2.0000 1.0000 3.0000 TRINECTES HACULATUS 22.0000 SPECIES 6.0000 6.0000 9.0000 8.0000 TOTAL FISH 361. 0000 33.0000 394~0000 93.0000 H_PRIHE 1.1894 l.5605 1.4282 1.8190 EVENNESS 0.4601 0.6037 0.4505 0.6063 RICHNESS 0.5885 0. 9912 0. 9279 1.0705

e Table 4.13.B.2.B-6 SUP.RY POWER STATION CATCH BY SPECIES At!D DIVER3IH ESTIMATES BY MONTH FOR 1980 PLEASE SEE FIGURE 4.13.B.2-2 FOR STATION LOCATIONS JUNE 1----------- SEINE----------! TRAWL INTAKE WTAKE TOTAL SOUTH NORTH ANCHOA MITCHILLI 52.0000 1.0000 53.0000 ANGUILLA ROSTRATA 2.0000 BREVOORTIA TYRANNUS 1522 119.0000 1641 1.0000 DOROSOHA CEPEDIANUH 1.0000 1.0000 ICTALURUS CATUS 3.0000 ICTALURUS PUNCTATUS 3.0000 LEIOSTOHUS XANTHURUS 9.0000 1.0000 10.0000 11.0000 LEPOHIS HACROCHIRUS 1.0000 1.0000 HEMBRAS MARTINICA 9.0000 3.0000 12.0000 HENIDIA BERYLLINA 1. 0000 1.0000 HICROPOGONIAS UNDULATUS 3.0000 3.0000 19.0000 MORmlE AMERICANA 1.0000 1.0000 1.0000 FOHATOMUS SALTATRIX l.0000 1.0000 TRINECTES MACULATUS 2.0000 2.0000 48.0000 SPECIES 8.0000 7.0000 11.0000 8.0000 TOTAL FISH 1599 127.0000 1726 88.0000 H_PRIHE 0.3550 0.4907 0.3749 1.9327 EVENl'IESS _0.1183 0.1748 0.1084 0.6442 RICHNESS 0.6577 0.8585 0.9300 l.0837

e SURRY FO~ER STATION CATCH BY SPECIES Atm DIVERSITY ESTIMATES BY MONTH FOP. 1980 PLEASE SEE FIGU?.E 4.13.B.2-2 FOR STATION LOCATIOIIS JULY 1----------- SEIHE ----------! TRAWL INTAKE INTAKE TOTAL SOUTH NORTH ACANTHARCHUS POHOTIS 3.0000 3.0000 ACIPENSER OXY?.HYNCHUS 1.0000 ANCHOA tiITCH!LLI 2.0000 2.0000 ANGUILLA ROSTRATA l.0000 CENTP.AP.CHUS HACROPTERUS 85.0000 27.0000 112. 0000 CYPRIHUS CAP.PIO l.0000 ESOX NIGER 1. 0000 1.0000 FUNDULUS HETEROCLITUS l. 0000 l.0000 ICTALURUS CATUS 9.0000 ICTALURUS Ft..'NCTATUS 2.0000 LEIOSTOHUS XA."ITHURUS 18.0000 HEHIDIA HEt!IDIA 5.0000 6.0000 11.0000 NICROPOGOIIIAS UNDULATUS 15.0000 HICROPTERUS SALHOIDES 80.0000 80.0000 HORONE AMERICANA 1.0000 SYNGNATHUS FUSCUS 7.0000 7.0000 TRINECTES ~.ACULATUS 2.0000 l.0000 3.0000 114.0000 SPECIES 7.0000 5.0000 9.0000 9.0000 TOTAL FISH 178.0000 42.0000 220.0000 162.0000 H_PF!IHE l. 4593 l.4984 1.7023 1.5180 EVENNESS 0.5198 .0.6453 0.5370 0.4789 RICHNESS 0.8026 0.7416 1.0281 1.0899

e e Table 4.13.B.2.B-8 SURRY FOWER STATION CATCH BY SPECIES AND DIVERSITY ESTIMATES BY MONTH FOP. 1980 PLEASE SEE FIGURE 4.13.B.2-2 FOR STATION LOCATIONS AUGUST 1----------- SEitlE ----------1 TRAWL INTAKE INT~KE TOTAL SOUTH NORTH ANCHOA MITCHILLI 3.0000 3.0000 1.0000 BREVOORTIA TYRANNUS 233.0000 233.0000 ICTALURUS CATUS 1.0000 ICTALUP.US PUNCTATUS 2.0000 LEIOSTOHUS XANTHURUS 9.0000 2.0000 11.0000 NEN!DIA HENIDIA 2.0000 53.0000 55.0000 NICROPOGONIAS UNDULATUS 2.0000 2.0000 5.0000 NORONE AMERICANA 1.0000 6.0000 7.0000 2.0000 HOP.ONE SAXATILIS 1.0000 1.0000 NUGIL CEPHALUS 1.0000 1.0000 TRINECTES MACULATUS 49.0000 SPECIES 6.0000 5.0000 8.0000 6.0000 TOTAL FISH 18.0000 295.0000 313.0000 60.0000 H_FRI11E 2.0986 0.90"!8 1.2140 1.0614 EVENNESS 0.8118 0.3897 0.4047 0.4106 RICHNESS 1.1991 0.4-375 0.8444 0.8465 J

e e Table 4.13.B.2.B-9 SURRY PO:.lE~ STATimJ CATCH BY SPECIES AllD DIVERSITY ESTINA TES BY MONTH FOR 1980 PLEASE SEE FIGURE 4.13.B.2-2 FOR STATION LOCATIONS SEPTEMBER

!----------- SEINE

__________ , TRAWL IllTAKE INTAKE TOTAL SOUTH UORTH ANCHOA HITCHILLI 9.0000 9.0000 29.0000 BREVOORTIA TYRANNUS 12.0000 43.0000 55.0000 OOROSOHA CEPEDIANUN l.0000 l.0000 LEIOSTOHUS XANTHURUS 5.0000 5.0000 10. 000,0 3.0000 HENIDIA HENIDIA 114.0000 364.0000 478.0000 HICROPOGONIAS UNDULATUS l.OOOl: 1. 0000 NOROIIE AMERICANA l. 0000 l.0000 HCRONE SAXATILIS 4.0000 4.0000 STP.ONGYLURA MARINA l. 0000 1.0000 TRINECTES MACULATUS 22.0000 SPECIES 7.0000 5.0000 9.0000 3.0000 TOTAL FISH 143.0000 417.0000 560.0000 54.0000 H_PRIHE l.1311 0.6709 0.8394 l.2411 EVENNESS 0.4029 0.26S9 0.2648 0.7831 RICHNESS 0.8380 0.4596 0.8763 0.3475

'l e e Table 4.13.B.2.B-10 SURRY POWER STATION CATCH BY SPECIES AtlD DIVERSITY ESTIMATES 9Y t10NTH FOP. 1980 PLEASE SEE FIGURE 4.13.B.2-2 FOR STATION LOCATIONS OCTOBER 1----------- SEINE ----------1 TRAWL IIHAKE ItITAKE TOTAL SOUTH NORTH ALOSA AESTIVALIS 1.0000 1.0000 ANCHOA MITCHILLI 181.0000 25.0000 206.0000 1.0000 ANGUILLA ROSTRATA 1.0000 CHAETOOEPTERUS FABER 2.0000 CYNOSCION REGALIS 1.0000 DOROSOHA CEPEDIANUJ1 1.0000 1.0000 ICTALURUS CATUS 1.0000 LEIOSTDHUS XANTHURUS 11.0000 11.0000 37.0000 HEHSRAS HARTINICA 1.0000 4.0000 5.0000 HENIDIA BERYLLINA 87.0000 87.0000 HEHIDIA HEtUDIA 54.0000 25.0000 79.0000 HEHTIC!RRHUS AHERICANUS 1.0000 NDRONE AHERICANA 2.0000 2.0000 1.0000 HORONE SAXATILIS 1. 0000 1.0000 NUGIL CEPHALUS 3.0000 1.0000 4.0000 SYHPHURUS PLAGIUSA 1.0000 TP.INECTES HACULATUS 209.0000 SPECIES 6.0000 8.0000 10.0000 10.0000 TOTAL FISH 251.0000 146.0000 397.0000 255.0000 H_PRIHE 1.1545 1.6917 1.8279 0.9i36 EVENNESS 0.4467 0.5S39 0.5503 0.2750 RICHNESS 0.6272 0.973S 1.0425 1.1258

e Table 4.13.B.2~B-ll StiRRY POWER STATION CATCH BY SPECIES AtJO DIVERSITY ESTitlATES BY McmH FOP. 1980 PLEASE SEE FIGURE 4.13.B.2-2 FOR STATION LOCATIONS NOVEMBER 1----------- SEINE ----------1 TRAWL INTAKE INTAKE TOTAL SOUTH NORTH ANGUILLA ROSTRATA 2.0000 ICTALURUS PUNCTATUS 3.0000 LEIOSTOMUS XANTHURUS 13.0000 13.0000 60.0000 MEHBRAS NARTINICA 5.0000 5.0000 NENIDIA HENIDIA 13.0000 17.0000 30.0000 HICROPOGONIAS UNOULATUS 3.0000 HORONE AMERICANA 1.0000 1.0000 19.0000 PARALICHTHYS DENTATUS 9.0000 TRINECTES MACULATUS 662.0000 SPECIES l.0000 4.0000 4.0000 7.0000 TOTAL FISH 13.0000 36.0000 49.0000 758.0000 H_PRIHE 0.0000 1.5810 1.3918 0.7553 EVENNESS 0.0000 0.7905 0.6959 0.2690 RICHNESS 0.0000 0.5803 0.5343 0.6272

. e Table 4.13.B.2.B-12 SURRY POWER STATION CATCH BY SPECIES AIID DIVERSITY :STIHATES BY NONTH FOR .1980 PLEASE SEE FIGURE 4.13.B.2-2 FOR STATION LOCATIONS DECEMBER 1----------- SEINE -------~--1 TRAWL ItHAKE INTAKE TOTAL SOUTH NORTH ANCHOA MITCHILLI 43. 0000 LEIOSTOMUS XANTHURUS 2.0000 H:NIDIA BERYLLINA 3.0000 85.0000 88.0000 HENIDIA HEtiIDIA 1.0000 6.0000 7.0000 HOROt/E AMERICANA 8.0000 PARALICHTHYS DENTATUS 1.0000 TRINECTES HACULATUS 1.0000 SPECIES 2.0000 2.0000 2.0000 5.0000 TOTAL FISH 4.0000 91. 0000 95.0000 55.0000 H_PRIHE 0 .8113 0.3506 0.3795 1.0663 EVEH~lESS 0.8113 0.350£> 0.3795 0.4592 RICHNESS 0.5000 0.1537 0.1522 0.6919

e e Table 4.13.s.3-1A CC~PDSITION Or SAMPLES DURING PRE-OPERATION CPRE_PCT), POST-O?EP.ATION PP.IO?. TO 1980 ( POST_PCT), AND THE CURRENT YEAR c_so_PCT)

VALUES ARE EXPRESSED AS PERCENTAGES SEE TEXT FOR FUP.THER EXPLANATim~

GEAR=MONTHLY SEINE---**---------------------

SPECIES PRE_FCT POST_PCT _80_FCT ACA~lTHARCHUS POHOTIS < 0.5 A-LOSA AESTIVALIS 8.8 2.9 < 0.5 ALOSA tEDICCRIS < 0.5 ALOSA FSEUDOHARENGUS < 0.5 < 0.5 ALCSA SAPIDISSIMA < 0.5 < 0.5 Ml:HOA HITCH I LLI 11.6 10.4 18.8 ANGUILLA ROSTRATA < 0.5 < 0.5 B::1::C'IOC:=!TIA TYRA}l:-IUS 12.9 38.4 48.8 CARANX HIPPOS < 0.5.

CENTP.ARCHUS HACP.OPTERUS 2.8 cn;ascro~l REGALIS < 0.5 CYrP.rnus CARPIO < 0.5 < 0.5 DOROSCMA CEPEDIANIJH < 0.5 0.6 < 0.5 DOP.OSJMA FETENENSE < 0.5 ELO?S SAURUS < 0.5 ESOX NIGER < 0.5 ETr.EOSTOMA OLMSTED! < 0.5 FUtDULUS DIAFHA~;us < 0.5 2.3 FU;-muu.;s '"ETEROCLITUS 0.6 2.1 < 0.5 Flf.JDULUS LUCIAE < 0.5 FUNJULUS MAJALIS < 0.5 GAM3:JS!A AFFINIS < 0.5 GCoIOSO~A SOSCI < 0.5 <* 0.5 HY30St1ATHUS NUCHALIS < 0.5

!CTALURUS CATUS < 0.5 < 0.5 ICTALURUS t1E8UL0SUS < 0.5 < 0.5 < 0.5 ICTALURUS PU~lCTATUS < 0.5 0.6 < 0.5 LEIOSTCMUS XANTHURUS 6.6 11.0 3.4 LEFOms GIS30SUS < 0.5 < 0.5 < 0.5 LEFOH!S MACROCHIRUS < 0.5 < 0.5 MEM=RAS MARTINICA 0.5 0.8 MENIDIA BERYLLINA 9.1 15.2 4.5 HENIDIA t!E~lIDIA 38.8 6.7 16.5 HICROFOGOilIAS UNDULATUS < 0.5 1.6 < n . .::,-

~

HICP.OPTERUS SALHOIDES 2.0 MCP.ON::C AH::P.ICANA 2.8 0.6 < 0.5 HOP.ON:: SAXATILIS < 0.5 < 0.5 < 0.5 MUSIL CEFHALUS < 0.5 < 0.5 HUGI L CUR EMA < 0.5

~!OTE:HIGONUS CRYSOLEUCAS < 0.5 0.7 < 0.5 NOTRCPIS AtlALOSH-NUS < 0.5 NOTROPIS coR:!UTUS < 0.5 NOTROFIS HUDSONIUS 5.9 3.1 < 0.5 PA?.ALICHTHYS DEfffATUS < 0.5 < 0.5 PERCA FLAVESCENS < 0.5

-FO:-lATCMUS SALTAT?.IX < 0.5 < 0.5 STP.mlGYluP.A MARINA < 0.5 < 0.5 < 0.5 SYMFHURUS PLAGIUSA < 0.5 srnG~lATHUS FUSCUS < 0.5 TRINECTES HACULATUS < 0.5 < 0.5 < 0.5 .-

_._._~_ ...____. ___...__ -*------ --- **--*-*-*-------*---*- -*-..

... ------.- -.-~--- *- -** ------- ****-*"'. *----..**--- -- ............... -- - ...._ *-- - . .q--,.~----- '* ----- -----*- --

v Table 4. 13.8.3-18 COMPOSITION OF SAMPLES OU?.WS P?.E-OPEP.AT!Ci~ ( P?.::_F'CTl, POST-OPERATI0~1 FRIO?. TO 1980 ( PCST_PCTJ, #;cl THE CUR~Er:T YEAR (_60_PCTl VALUES ARE EXPRESSED AS PE:C:C;:::NTASES SEE TEXT FOP. FURTHER EXPLAJ!ATIO:I

- GEAR=T?.AWL -----------------------------~

SPECIES . -*

p":;:- or~ POST_ PCT PCT ACIPENSEP. OXYRHYNCHUS < 0.5 ALOS.!i. AESTIVALIS 0.8 < 0.5 ALOSA M:cDIOCRIS 0.6 ALOSA PS~UDCHARC~~GUS 2.9 < 0.5 ALOSA SAPIDISS~JlA 1. 7 < 0.5 AfiCHOA MITCH IL LI 3.5 5.9 4.0 A}~GU!LLA ROSTRATA 1.4 1.4 < 0.5 BP.::VOORTIA TYRANf/US 0.7 < 0.5 CHAETODEPTEF.US FABER < 0.5 CYNOSCIOil REGALIS 2.2 0.9 < 0.5 CYP:=!ItlUS CAP.PIO < 0.5 0.5 < 0.5 DO:=!OSOMA CEPE!l IAiWH < 0.5 .1.1 < 0.5 DG?.OSQMA FETENalSE 0.7 a,:*JEACANTHUS GLO~IOS'.JS < 0.5 EUCINOSTOl-'.US A<:!GENTEUS < 0.5 G03IOSOMA BOSCI < 0.5 G:3ICSCHA GINS3U?.GI < 0.5 ICTALUiWS CATUS 2.7 4.3 1.0 ICTALURUS NE3UL0SUS < 0.5 ICTALURUS FU:lCTATUS 8.1 9.2 0.8 LEIOSTOMUS XAtffr.U?.US 6.5 12.5 9.6 HEf-~TICIP.RHU3 Al1ER::i:CAHUS < 0.5 HICRO:=OGO~UAS U:--lJULATUS 6.6 10.5 2.4

~OROtH: t.:--!C~!CA~1A 5.1 4.0 6.0 HC?.CME SAXATILIS < 0.5 < 0.5 < 0.5 NOTRO?IS HU'.lsomus 1.0 0.8 < 0.5 PARALICHTHYS oaffATUS < 0.5 0.5 SYMPHU~US PLAG:USA < 0.5 TF!nli:CTES NA CU LATUS 56.2 45.9 74.5

.., * -t I 'i

'\,../ ,,, ',.,.

/ '

e

4. 13, B. 3 The data collected in the seine and trawl samples may probably best be analyzed by inspection of preoperational, earlier postoperational, and current samples from the stations now monitored. Tables 4,13-IA and B show the relative abundance of each species for each gear type during the preoperational period, during the postoperational period prior to 1980, and during 1980. As might be expected, the data show considerable variation among the minor species.

Among the major species caught in the seine samples, Anchoa mitchilli, Brevoortia tt.rannus, and Menidia menidia increased while Menidia beryl] ina and tlotropis hudsonius decreased. In the trawl samples, Microe_ogonias undulatus and lct~lurus .e!:!_~ctatus decreased while Trinectes maculatus increased. At most, these variations can be considered to reflect normal estuarine variability coupled both with the effects of the recent severe winters of 1977, 1978, and 1980, and the drought of 1980. Power station operations do not appear to have had a noticeable effect.

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