ML19093A151

Annual Operating Report 1977, Volume 4

ML19093A151
Person / Time
Site:	Surry
Issue date:	12/31/1977
From:	Virginia Electric & Power Co (VEPCO)
To:	Office of Nuclear Reactor Regulation
References
Download: ML19093A151 (193)

Text

A.""fNUAL

. OFER.AT S.URR.y PO'WER. ING REPORT 19 77 VIRGINIA E. STATION

. LECTRIC -

DOCKET Nos. so . AND POWER co.

VOLUME 4 -280 and 50-281

- NOTICE -

THE ATTACHED FILES ARE OFFICIAL RECORDS OF THE.

DIVISION* OF DOCUMENT CONTROL.- THEY HAVE BEEN CHARGED TO YOU FOR A LIMITED TIME PERIOD AND MUST BE RETURNED TO THE RECORDS FACILITY BRANCH 016. PLEASE DO NOT SEND DOCUMENTS CHARGED OUT THROUGH THE MAIL. REMOVAL OF ANY PAGE(S) FROM DOCUMENT FOR REPRODUCTION MUST

• BE REFERRED TO FILE PERSONNEL. .

Doc~et-#3?>.:Z~/2.~ I DEADLINE RETURN DATeCm1trnl #-?>>-91 </0/2.(;,

Date 3 h. zbY. iilfDllc~ment:

REGlH..ATURY DOC!{U FJU RECORDS FACILITY BRAl'JCH

• 3.6 FISH MORTALITIES Fish impingement estimates for the low-level screens for the time period of January 5, 1977 to December 28, 1977 are reported. These estimates are based on two five-minute replicates taken daily Monday through Friday and extrapolated to reflect weekly values. No data are presented for the period January 17, 1977 through May 1, 1977. On January 17 the low-level screens became clogged with ice and had to be removed to permit station operation.

The low-level screens, which were specifically designed to reduce fish impingement mortality, stopped an estimated 3,166,689 fish from entering the high-level canal during this time period. Of this total, an estimated 3,080,433 individuals were returned to the river alive. The average eight month survival was 97.1% with a range of 92% to 99%.

3.6-1

SURRY POWER STATION Ave. No. Circ. Pumps: 5 LOW LEVEL WEEKLY REPORT Temperature Min-Max: o.s - 1.4 Salinity Min - Max: J.4 - 6.).i Week Of January 2 Through January 8, 1977 Survival Percentage= ___,9__2_ _ O/o IMS rnni; COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALIVE DEAD 040 Channel catfish I eta 1urus punctatus 140-199.200-299 288 0 039 White catfish lctalurus catus 116 Brown bullhead lctalurus nebulosus 108 Golden shiner Notemigonus crysoleucas 110 Spottai I shiner Not rep is hudsonius 060 American eel Anguilla rostrata 051 Gizzard shad Dorosoma ceoedianum 120-139 15,261.t 1. 728 275 Threadfin shad Dorosoma petenense 026 Alewife Alosa pseudoharengus 027 B1ueback herring Alosa aestival is 60-79 1,296 288 0~7 Atlantic menhaden Brevoortia tvrannus 80-99 288 0 103 Bay anchovy Anchoa mi tch i 11 i 149 Tidewater silverside Menidia beryl 1 i na 60-79.80-99 288 0 150 Atlantic si lverside Menidia menidia 60-79.80-99 lh4 288 i!

033 Pumpkinseed White perch Spot Lepomis gibbosus Marone americana Leiostomus xanthurus 80-99 3.7hh 0 005 Atlantic croaker Micropogon undulatus 40-59 576 0 151 Hog choker Trinectes maculatus 105 Chain pickerel Esox niger 200-299 144 0 231 Striped I!lul-lst Mugil cephalus lL.0-199 4,032 0 I

~ ,

I 3.6.2 TOTAL 26,064 2,304 R - 9/75

SURRY POWER STATION Ave. No. Circ. Pumps: 5

.k LOW LEVEL WEEKLY REPORT Temperature Min- Max: o.o - 2.6 Salinity Min - Max: 2.7 - 6.6 Of January 9 Through January 15, 1977 Survival Percentage: -~9...l.7__ 0/o VIMS rnnF COMMON NAME ~CIENTIFIC NAME MODAL SIZE (mm) ALIVE DEAD 040 Channel catfish I eta 1urus ounctatus 200-299 3.312 0 039 White catfish I eta 1urus catus 200-299 576 0 116 Brown bu 11 head lctalurus nebulosus 108 Golden shiner Notemigonus crysoleucas 110 Spottai 1 shiner Notropis hudsonius 060 American eel Angui 11 a ros t rat a 051 Gizzard shad Dorosoma ceoedianum 100-119 2r;.056 576 275 Threadfin shad Dorosoma oetenense 026 Alewife Alosa pseudoharengus 027 B1ueback herrinc Alosa aestival is 60-79 3,024 0 o*H Atlantic menhaden Brevoortia tyrannus I 100-119 0 288 103 Bay anchovy Anchoa mi tch i 11 i 149 Tidewater silverside Menidia beryl l i na 60-79 720 288 150 Atlantic silverside Menidia menidia 80-99 288 0 5 Pumpkinseed Lepomis qibbosus 100-llQ 288 0 032 White perch Merone americana 60-79.80-99 1.296 0 033 Spot Leiostomus xanthurus 005 At !antic croaker Micropogon undulatus 151 Hog choker Trinectes maculatus 107 Silvery minnow Hybognathus nuchalis 100-119 144 0 231 Striped mullet Mugil cephalus 1uo-199 1,152 0

- 35,856 1,152 I

R - 9/75 3.6.3 TOTAL

SURRY POWER STATION Ave. No. Circ. Pumps:

LOW LEVEL WEEKLY REPORT Temperature Min-Max: 18.0 - 21.8.

Salinity Min - Max: h.7 - 6.o

. k Of May 1 Through May 7, 1977 Survival Percentage: 98 O/o

• 5 Pumps and 3 Screens VIMS rnni= COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALIVE DEAD 040 Channel catfish lctalurus punctatus 200-299 S76 0 039 White catfish I eta l urus catus 116 Brown bu 11 head lctalurus nebulosus 140-199 2aa 0 108 Golden shiner Notemigonus crysoleucas 110 Spottai I shiner Notropis hudsonius 060 American eel Anquilla ros t rat a 200-299 720 0 051 Gizzard shad Dorosoma ceoedianum 140-199 288 0 275 Threadfin shad Dorosoma petenense 80-99 576 0 026 Alewife Alosa pseudoharengus 027 B1ueback herrinq Alosa aestival is 200-299 lhh 0 037 Atlantic menhaden Brevoortia tyrannus 80-99 24.912 lh4 103 Bay anchovy Anchoa mi tch i 11 i 60-79 720 0 149 Tidewater silverside Menidia beryl l i na ISO Atlantic si lverside Menidia rnenidia 80-99 0. 288

• 5033 2

Pumokinseed White perch Spot Leoomis qibbosus Marone arnericana Leiostomus xanthurus 80-99 100-119 .. 120-139 2.160 24.192 864 0

005 Atlantic croaker Micropogon undulatus 151 Hog choker Trinectes maculatus 40-59.100-119 576 0 1L.8 Rough silverside Mam.bras martinica 80-99 ~76 llil, 122 Mummichog Fundulus heteroclitus 80-99 288 0 031 Striped bass Marone saxatilis 140-199 288 0 003 Summer flounder Paralichthys dentatus 40-59 720 0

- 57,024 1,440 I

R - 9/75 3.6.4 TOTAL

SURRY POWER STATION Ave. No. Circ. Pumps: 5-i:-

LOW LEVEL WEEKLY REPORT Temperature Min-Max: 16.6 - 20.2 Salinity Min - Max: -------

3.1 - 5.9

. k Of May 8 Through May 14, 1977 Survival Percentage: 98  %

• 5 fumps and 4 Screens VIM::,

rnni:: COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALI VE DEAD 040 Channel catfish lctalurus punctatus 039 White catfish lctalurus catus 140-199 144 0 I 16 Brown bul I head lctalurus nebulosus 140-199 144 0 108 Golden shiner Notemigonus crysoleucas 110 Spottail shiner Notropis hudsonius 060 American eel Anquilla rest rat a 200-299* 864 0 051 Gizzard shad Dorosoma cepedianum 275 Threadfin shad Dorosoma petenense 80-09 1.ooa 0 026 Alewife Alosa pseudoharengus 200-299 0 144 027 BI ueback herrinq Alosa aestival is 200-299 286 0 037 Atlantic menhaden Brevoortia tyrannus 80-99 26.028 86L.

103 Bay anchovy Anchoa mi tchi 11 i 60-79 720 0 149 Tidewater silverside Menidia beryl 1i na 150 Atlantic si lverside Menidia menidia 5 Pumpkinseed Lepomis qibbosus 80-99.120-139 432 0 032 White perch Merone americana 100-119 86L. 0 033 Spot Leiostomus xanthurus 120-139 38,304 144 005 Atlantic croaker Micropogon undulatus 151 Hog choker Trinectes maculatus LO-t,9 1.1i:;2 0 009 Bluefish Pomatomus saltatrix L.o-i;9 288 0 003 Summer flounder Paralichthys dentatus 40-59 720 0 114 Shorthead redhorse Moxostoma macrolepidotwn 300-399 144 0 031 Striped bass Marone saxatilis 140-199 288 0 R - 9/75 TOTAL 72,288 1,152 3.6.5

SURRY POWER STATION Ave. No. Circ. Pumps: 7 LOW LEVEL WEEKLY REPORT Temperature Min- Max: 20.2 - 23.3 Salinity, Min - Max: 5.5 - 6.7 Through May 21, 1977 Survival Percentage: __ 9_8

__ O/o VIM::,

rnn~ COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALI VE DEAD 040 Channel catfish lctalurus punctatus 039 White catfish lctalurus catus 120-139 lhh 0 116 Brown bu 11 head lctalurus nebulosus 140-199 l.i32 0 108 Golden shiner Notemigonus crysoleucas 110 Spottai I shiner Notropis hudson i us 060 American eel Anquilla rostrata 200-299 h12 0 OS 1 Gizzard shad Dorosoma ceoedianum 275 Threadfin shad Dorosoma petenense 100-119 ll,l, 0 026 Alewife Alosa pseudoharengus 027 BI ueback herrinq Alosa aestival is 037 Atlantic menhaden Brevoortia tyrannus 120-119 c:;s.012 1.l.ihO 103 Bay anchovy Anchoa mitchilli 80-99 288 0 149 Tidewater silverside Menidia beryl Ii na lSO Atlantic si lverside Menidia menidia I!

033 Pumokinseed White perch Spot Lepomis qjbbosus Marone americana Leiostomus xanthurus lh0-199 120-139 l,hhO 61.344 432 0

005 Atlantic croaker Micropogon undulatus 200-299 r576 0 151 Hog choker Trinectes maculatus 20-39.40-59 1.152 288 148 Rough silverside Membras martinica 100-ll9 144 144 009 Bluefish Pomatomus saltatrix 200-299 144 0 031 Striped bass Morone saxatilis 140-199 286 0 007 Weakfish Cynoscion regalis 140-199.200-299 288 0 003 Summer flounder Paralichthys dentatus 40-59,200-299 432 0

- 3.6.6 125,280 2,304 I

R - 9/75 TOTAL

SURRY POWER STATION Ave. No. Circ. Pumps: 8 LOW LEVEL WEEKLY REPORT. Temperature Min- Max: 22.6 - 26.1 Salinity Min - Max: 6.o - 6.6

. k Of May 22 Through May 28, 1977 Survival Percentage= 99  %

VIMS rnnF COMMON NAME SC I ENTI FI C NAME MODAL SIZE (mm) ALI VE DEAD 040 Channel catfish lctalurus ounctatus 039 White catfish lctalurus catus 140-199,300-399 uJ2 0 116 Brown bu 11 head I eta I urus nebulosus 108 Golden shiner Notemigonus crysoleucas 110 Spottai 1 shiner Notropis hudsonius 060 American eel Anguilla ros trata 051 Gizzard shad Dorosoma ceoedianum 200-299-300-399 576 0 275 Th readfi n shad Dorosoma oetenense 80-99 h12 0 026 Alewife Alosa pseudoharengus 027 B1ueback herrina Alosa aestival is 200-299 llili 0 o*:n Atlantic menhaden Brevoortia tyrannus 120-119 168.192 1.008 103 Bay anchovy Anchoa mitchilli 60-79 uJ2 576 149 Tidewater si lverside Menidia beryl 1 i na 150 Atlantic silverside Menidia menidia

• 5 32 033 Pumpkinseed White perch Spot Lepomis qibbosus Marone americana Leiostomus xanthurus 120-139 120-1"19 1u4 1i,.02u 0

0 005 Atlantic croaker Micropogon undulatus ?00-?0Q , ),I, n 151 Hog choker Trinectes maculatus uO-t;9 2.716 0 OJO American shad Alosa saoidissima 400-499 1hu 0 148 Rough silverside Membras martinica 80-99 720 288 009 Bluefish Pomatomus saltatrix 40-',9 432 0

- 3.6.7 249.,552 1,872 1

R - 9/75 TOTAL

SURRY POWER STATION Ave. No. Circ. Pumps: 8 LOW LEVEL WEEKLY REPORT Temperature Min-Max: 23.9 - 24.8 Salinity* Min - Max: 7.1 - 7.7 Week Of May 29 Th rough June 4, 1977 Survival Percentage: 96  %

eVIMS rnnF COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALI VE DEAD 040 Channel catfish lctalurus punctatus 120-119 lhh 0 039 White catfish lctalurus catus 140-199 288 0 116 Brown bu) ]head lctalurus nebulosus 108 Golden shiner Notemigonus crysoleucas 110 Spottail _shiner Notropis hudsonius 060 American .eel Angui I la ros t rat a 051 Gizzard shad Dorosoma ceoedi anum 100-~gg 1 lil, 0 275 Threadfin shad Dorosoma oetenense 026 Alewife Alosa pseudoharengus 027 Blueback herrinq Alosa aestival is 037 Atlantic menhaden Brevoortia tyrannus 120-119 101.S36 S.616 103 Bay anchovy Anchoa mi tch i 11 i 60-79 1.1S2 1,440 149 Tidewater silverside Menidia beryl l i na 150 Atlantic silverside Menidia menidia

~:

033 Pumokinseed White perch Spot Lepomis qjbbosus Merone americana Leiostomus xanthurus 40-59 81.216 1,440 005 Atlantic croaker Micropogon undulatus hO-S9.140-199 288 0 15 l Hog choker Trinectes maculatus ho-c:;9 c;,h72 0 052 Carp Cyprinus caroio 60-79 864 0 009 Bluefish Pornatomus saltatrix h0-59 720 0 031 Striped bass Merone saxatilis 20-39 432 0 007 Weakfish' Cvnoscion re£alis 140-199 288 0 003 Swmner flounder Paralichthys dentatus 200-299 1,152 0

\

e .,

l I

R - 9/75 TOTAL 19.5,696 8,496 3.6.8

SURRY POWER STATION Ave. No. Circ. Pumps: 7

.k LOW LEVEL WEEKLY REPORT Temperature Min- Max: 20o4 - 26.3 Salinity Min- Max: 5.2 - 8.1 Of June 5 Through June 11, 1977 Survival Percentage: _.._98____ 0/o VIMS

- rnni:: COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALI VE DEAD 040 Channel catfish I ctal urus punctatus 200-299 576 0 039 White catfish lctalurus catus 116 Brown bul !head I eta I urus nebulosus 108 Golden shiner Notemigonus crysoleucas 110 Spottai l shiner _Notropis hudsonius 060 American eel Anguilla rest rat a 200-299 288 0 051 Gizzard shad Dorosoma ceoedianum 275 Threadfin shad Dorosoma petenense 026 Alewife Alosa ps~udoharengus I 40-59 114 0 027 BI ueback herrinq Alosa aestival is 037 Atlantic menhaden Brevoortia tyrannus 120-139 108.101.i 1.600 103 Bay anchovy Anchoa mitchilli 60-79 1.600 720 149 Tidewater silverside Menidia beryl l i na 150 Atlantic silverside Menidia menidia 5 Pumpkinseed Lepomi s g i bbos-us 2 White perch Marone americana lh0-199 288 0 033 Spot Leiostomus xanthurus L.o-*c;9 71.C:8!.i 2.880 005 Atlantic croaker Micropogon undulatus 20-19.uo-59 861.i 0 151 Hog choker Trinec~es maculatus L.O-t;9 t;8.7t;2 720 052 Carp Cyprinus carpio uo-59 432 1uu 009 Bluefish Poma tomus. sal ta trix 200-299 t;76 0 031 Striped bass Marone saxatilis 20-39,L.0-59 432 0 003 Summer flounder Paralichthys dentatus 80-99 864 0 131 Northern pipefish Syngnathus fuscus 140-199 l4h 0

- 448,848 8,064 I

I R - 9/75 3.6.9 TOTAL

SURRY POWER STATION Ave. No. Circ. Pumps: 8 LOW LEVEL WEEKLY REPORT Temperature Min-Max: 22.5 - 24.3 8.5 - 9.2 lek Of June 12 Th rough June 18, 1977

• Salinity Min - Max:

Survival Percentage: 28 O/o VIMS rnni: COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALIVE DEAD 040 Channel catfish lctalurus punctatus 039 White catfish lctalurus catus 200-299 432 288 116 Brown bu 11 head lctalurus nebulosus 108 Golden shiner Notemigonus crysoleucas 110 Spottai 1 shiner Not rap is hudsonius 060 American eel Anquilla rest rata 051 Gizzard shad Dorosoma ceoedianum 60-79 0 lhh 275 Threadfin shad Dorosoma petenense 120-139.200-299 576 0 026 Alewife Alosa pseudoharengus 40-59 864 0 027 Blueback herrinq Alosa aestivalis 037 Atlantic menhaden Brevoortia tyrannus 40-59,120-139 103,392 1.1,2*

103 Bay anchovy Anchoa mitchilli 60-79 1,440 144 149 Tidewater silverside Menidia beryl 1 i na ISO Atlantic si lverside Menidia menidia

• 5 32 033 Pumokinseed White perch Spot

- Lepomis qjbbosus Marone americana Leiostomus xanthurus 120-119 80-99 llil, 31.82u 0

0 005 Atlantic croaker Micropogon undulatus 200-299 lld, 0 151 Hog choker Trinectes maculatus 40-59 9,504 720 196 Atlantic needlefish Stronizvlura marina 80-99 432 0 148 Rough silverside Membras martinica 80-99 1,008 144 204 Crevalle jack Caranx hippos 40-59 144 0 009 Bluefish Pomatomus saltatrix 200-299 1~728 0 031 Striped bass Merone saxatilis 40-59 288 0 003 SWlllller flounder Paralichthys dentatus 80-99 432 0 R - 9/75 3.6.10 TOTAL 152,352 2,592

SURRY POWER STATION Ave. No. Circ. Pumps: 8 LOW LEVEL WEEKLY REPORT Temperature Min-Max: 24.1 - 27.1 Salinity Min - Max: 8.9 - 9.8

- k Of June 19 Th rough June 2S, 1977 Survival Percentage: ___.9. .9. __ 0/o VIHS rnnF COHHON NAHE SCIENTIFIC NAME MODAL SIZE (mm) ALI VE DEAD 040 Channel catfish lctalurus punctatus 039 White catfish I eta 1urus catus 120-139 144 0 116 Brown bullhead lctalurus nebulosus 108 Golden shiner Notemigonus crysoleucas 110 Spottai 1 shiner Notropis hudsonius 060 American eel Anguilla ros trata 051 Gizzard shad Dorosoma cepedianum 275 Threadfin shad Dorosoma petenense ll,0-199 288 0 026 Alewife Alosa pseudoharengus 40-59 720 0 027 B1ueback herring Alosa aestival is o*u Atlantic menhaden Brevoo rt i a ty ran nus 100-119 262.080 2.101i 103 Bay anchovy Anchoa mitchilli 60-79 1.008 0 149 Tidewater si lverside Menidia beryl 1 i na 150 Atlantic si lverside Menidia menidia 5 Pumpkinseed Lepomis qibbosus 032 White perch Marone americana 120-139 288 0 033 Spot Leiostomus xanthurus 60-79 86.112 720 005 Atlantic croaker Micropogon undulatus 151 Hog choker Trinectes maculatus 40-S9 3.168 86u 148 Rough silverside Mernbras martinica 80-99 576 0 009 Bluofi5h Pomatornus saltatrix 200-299 1,584 0 031 Striped bass Marone saxatilis h0-59 144 0 007 Weakf'ish Cynoscion,regalis 200-299 144 0 003 Sununer flounder Paralichthys dentatus 100-119 288 0 i

R - 9/75 3.6 .11 TOTAL 356,544 3,888*

SURRY POWER STATION Ave. No. Circ. Pumps: 8 LOW LEVEL WEEKLY REPORT Temperature Min- Max: 26.8 - 28.8 Salinity Min- Max: 9.5 - 10.2

. k Of June 26 Th rough July 2., 1977 Survival Percentage: 99.7 %

VIM~

c-nni:- COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALI VE DEAD 040 Channel catfish I eta 1urus punctatus 200-299 288 0 039 White catfish lctalurus catus 140-199 144 0 116 Brown bu! ]head lctalurus nebulosus 40-59§140-199 432 0 108 Golden shiner Notemigonus crysoleucas 140-199 144 0 110 Spottai 1 shiner Notrop is hudson i us 060 American eel Angu i 11 a ros trata 200-299 288 0 051 Gizzard shad Dorosoma ceoedianum 300-399 144 0 275 Threadfin shad Dorosoma petenense 026 Alewife Alosa pseudoharengus 60:-79 720 0 027 B1ueback herrinq Alosa aestival is 200-299 144 0 037 Atlantic menhaden Brevoortia tyrannus 40-59 597§02u 864

\

103 Bay anchovy Anchoa mi tch i 11 i 60-79 720 720 149 Tidewater silverside Menidia beryl Ii na ISO Atlantic si Jverside Menidia menidia 5 Pumokinseed Lepomis qibbosus 032 White perch Morone americana 033 Spot Leiostomus xanthurus 60-79 110.592 432 005 Atlantic croaker Micropogon undulatus 200-299 576 0 I 51 Hog choker Trinectes maculatus L.0-59 6.768 0 196 Atlantic needlefish Stron12Vlura marina 80-99 uJ2 0 148 Rough silverside Membras martinica 80-99 576 0 009 Blusfish Pomatomus saltatriJc 200-299 4,464 0 031 Striped bass Marone saxatilis L.0-59 576 0 007 Weakfish Cynoscion regalis 140-199 432 0 003 Summer flounder Paralichthy1 dentatus 80-99.300-399 288 0

-*i R - 9/75 TOTAL 724.,752 2,016 1 3.6.12

SURRY POWER STATION Ave. No. Circ. Pumps: 8 LOW LEVEL WEEKLY REPORT Temperature Min- Max: 27.3 - 29.1 Salinity Min - Max: 9.0 - 10.4 Th rough July 9, 1977 Survival Percentage: 98  %

VIMS rnru:: COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALI VE DEAD 040 Channel catfish lctalurus ounctatus 039. White catfish lctalurus catus 116 Brown bul !head lctalurus nebulosus 140-199.200-299 576 0 108 Golden shiner Notemigonus crysoleucas 110 Spottai 1 shiner Notropis hudson i us 060 American eel Anguilla ros t rat a 051 Gizzard shad Dorosoma ceoedianum 275 Threadfin shad Dorosoma oetenense 026 Alewife Alosa pseudoharengus 027 Blueback he rri nq Alosa aestivalis 0~7 Atlantic menhaden Brevoort i a tyrannus 140-199 12.672 144 103 Bay anchovy Anchoa mitchilli 60-79 2,304 720 149 Tidewater silverside Menidia beryl Ii na ISO Atlantic silverside Menidia menidia

~ Pumpkinseed Lepomis qibbosus 032 White perch Marone americana 033 Spot Leiostomus xanthurus 60-79 78.048 t;76 005 Atlantic croaker Micropogon undulatus 151 Hog choker Trinectes maculatus 40-59 1.440 288 052 Carp Cyprinus caroio 80-99 144 0 148 Rough silverside Membras martinica 80-99 0 288 009 Bluefish Pomatomus saltatrix 80-99.200-299 288 0 031 Striped bass Marone saxatilis 40-59 720 0 007 Weakfish Cynoscion regalis 40-59,200-299 144 144 003 Summer flounder Paralichthys dentatus 200-299 432 0 la '

i' R - 9/75 TOTAL 96,768 2,160 3 .6 .13

SURRY POWER STATION Ave. No. Circ. Pumps: 6 LOW LEVEL WEEKLY REPORT Temperature Min-Max: 27 .h - 30.2 Salinity Min- Max: 8.7 - 10.9

. e k Of July 10 Through July 16, 1977 Survival Percentage: 98  %

VIM~

r'nni= COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALI VE DEAD 040 Channel catfish lctalurus punctatus 039 ' White catfish lctalurus catus 116 Brown bul !head lctalurus nebulosus 100-119.200-299 288 0 108 Golden shiner Notemigonus crysoleucas

- Notropis hudsonius 110 Spottai l shiner 060 American eel Anguilla rostrata 200-299 0  ?RR 051 Gizzard shad Dorosoma ceoedianum 100-119 ll,l, 0 275 Threadfin shad Dorosoma petenense 100-119 288 0 026 Alewife Alosa pseudoharengus 60-79 0 288 027 Blueback herrinq Alosa aestival is 037 Atlantic menhaden Brevoortia ty.rannus 120-139 1c,.26h r,76 103 Bay anchovy Anchoa mi tch i TI i 60-79 2.160 288 149 Tidewater silverside Menidia beryl l i na ISO Atlantic silverside Menidia menidia 100-119 288 0 5 Pumpkinseed Lepomis qibbosus lh0-199 0 288 032 White perch Marone americana lh0-199 288 0

'I 033 Spot Leiostomus xanthurus 80-99 165,888 2,JOh 005 Atlantic croaker Micropogon undulatus 100-119 lhh 0 151 Hog choker Trinectes maculatus 40-59 2.304 0 196 Atlantic needlefish Strongylura marina 100-119 144 0 148 Rough silverside Membras martinica 40-C,9.80-99 i,76 0 136 Bluegill Lepomis macrochirus 140-199 14h 0 031 Striped bass Merone saxatilis 60-79 576 0 001 Weakfish Cynoscion regalis 200-299 144 0 144 Naked goby Gobiosoma bosci 20-39 144 0 003 Swarner flollllder Paralichthvs dentatus 140-199 144 0

- 1 R - 9/75 TOTAL 188.,928 4,032 3.6.14

SURRY POWER STATION Ave. No. Circ. Pumps: 7 LOW LEVEL WEEKLY REPORT Temperature Min-Max: 28.0 - 3lo2 Salinity Min- Max: 9.0 - 10o2

- k Of July 17 Th rough July 23 11 1977 Survival Percentage: 99  %

VIMS rrmi: COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALIVE DEAD 040 Channel catfish lctalurus punctatus 039 White catfish lctalurus catus 200-299,300-399 432 0 116 Brown bu 11 head lctalurus nebulosus 108 Golden shiner Notemigonus crysoleucas 110. Spottail shiner Notropis hudsonius 060 American eel Anguilla rostrata 140-199 0 288 051 Gizzard shad Dorosoma ceoedianum 140-199 288 0 275 Threadfin shad Dorosoma petenense 60-79.80-99 432 0

.026 Alewife Alosa pseudoharengus 60-79 288 0 027 Blueback herrina Alosa aestival is 037 At !antic menhaden Brevoortia tyrannus 120-139 11~232 288 103 Bay anchovy Anchoa mitchilli 60-?Q 2.016 86L 149 Tidewater silverside Menidia beryl] i na 1i;o Atlantic si lverside Menidia menidia Pumpkinseed Lepomis aibbosus 032 White perch Marone americana 140-199 288 0 033 Spot Leiostomus xanthurus 80-99 223. 776 1.008 005 Atlantic croaker Micropogon undulatus 151 Hog choker Trinectes rnaculatus 052 Carp Cyprinus caroio 60-79 2.016 0 148 Rough silverside Membras martinica 80-99 0 144 009 Bluefish Pomatomus saltatrix 200-299 288 0 031 Striped basl! Marone saxatilis 60-79 576 0 007 Weakfish Cynoscion regalis h0-59 144 0 121 Banded killifish Fundulus diaphanus 60-79 288 0 003 Summer flounder Paralichthys dentatus 140-199 144 0

~ .,

R - 9/75 TOTAL 242,208 2.,.592 3.6.15

SURRY POWER STATION Ave. No. Circ. Pumps: 8 LOW LEVEL WEEKLY REPORT Temperature Min- Max: 25.5 - 27.0 Salinity Min - Max: 9.7 - 12.2

- k Of July 24 Through July 30, 1977 Survival Percentage: -.L:98.i.....__ 0/o VIMS rnnF COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALI VE DEAD 040 Channel catfish lctalurus punctatus 200-299 144 0 039 White catfish lctalurus catus 116 Brown bullhead lctalurus nebulosus 140-199 144 0 108 Golden shiner Notemigonus crysoleucas 110 Spottai I shiner Notropis hudsonius 060 American eel Anguilla ros t rat a 200-299 288 0 051 Gizzard shad Dorosoma ceoedianum 120-139 1,440 0 275 Threadfin shad Dorosoma petenense 120-139 144 0 026 Alewife Alosa pseudoharengus 60-79 144 0 027 Blueback herrina Alosa aestival is 037 Atlantic menhaden Brevoo rt i a ty ran nus 80-99 13,536 432_*

103 Bay anchovy Anchoa mitchilli 60-79 6,336 576 149 Tidewater si lverside Menidia bery 11 i na 20-39 288 0 ISO Atlantic si lverside Menidia menidia 60-79 1.1S2 0 5 Pumpkinseed Lepomis aibbosus 032 White perch Marone americana 60-79 144 0 033 Spot Leiostomus xanthurus 80-99 86,400 576 005 At I antic croaker Micropogon undulatus 60-79,1l.OO-U9 L.32 0 151 Hog choker Trinectes maculatus 40-59 1,872 0 122 Mwumichog Fundulus heteroclitus 40-59 864 0 196 Atlantic needlefish Strongylura marina 140-199 144 0 009 Bluefish Pomatomus saltatrix 120-139,300-399 288' 0 007 Weakfish Cynoscion regalis 60-79 288 288 144 Naked goby Gobiosorna bosci 20-39 576 0 131 Northern pipefish Syn1<Ilathus fuscus 140-199 144 0 011 Harvestfish Pepril~s alepidotus 20-39 144 0

.J I

R - 9/75 TOTAL 114,912 1,872 3.6.16

SURRY POWER STATION Ave. No. Circ. Pumps: 8 LOW LEVEL WEEKLY REPORT 27.4 - 28.8

-k Temperature Min-Max:

Salinity Min-Max= ll.5 - 12.7 Of July 3l., l.977 Through August 6, 1977 . Survival Percentage= 97 .o/o VIMS rnni:- COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALIVE "DEAD 040 Channel catfish lctalurus ounctatus 039 White catfish lctalurus catus 116 Brown bull head lctalurus nebulosus 108 Golden shiner Notemigonus crysoleucas 110 Spottai 1 shiner Notropis hudsonius 060 American eel Anguilla rostrata 051 Gizzard shad Dorosoma ceoedianum 140-199 288 0 275 Threadfin shad Dorosoma oetenense 80-99 1,152 0 026 Alewife Alosa pseudoharengus 027 B1ueback herrina Alosa aestival is 037 Atlantic menhaden Brevoortia tyrannus 100-119 15,264 864 103 Bay anchovy Anchoa mi tchi 11 i 60-79 5,040 2.016 149* Tidewater silverside Menidia beryl l i na ISO Atlantic silverside Menidia menidia 40-59.80-99 576 0 5 Pumpkinseed Lepomis qibbosus 032 White perch Mo rone ame r i c:ana 033 Spot Leiostomus xanthurus 60-79.80-99 88,.560 576 005 Atlantic croaker Micropogon undulatus 120-139 2,736 0 151 Hog choker Trinectes maculatus 60-79 288 0 052 Carp Cyprinus carpio 100-119 288 0 196 Atlantic needlefish Strongylura marina 140-199 0 144 009 Bluefish Pomatomus saltatrix 140-199 1,872 0 011 Harvestfish Peprilus alepidotus 20-39,40-.59 864 0 007 Weakfish Cynoscion regalis 40-59,60-79 1,008 0 i

R - 9/75 3.6.17 TOTAL 117,936 3,600

SURRY POWER STATION Ave. No. Circ. Pumps:

LOW LEVEL WEEKLY REPORT Temperature Min- Max: 26.9 - 30.h I

Salinity Min - Max: 11.1 - 12.7

~ k Of August 7 Through August 13, 1977 Survival Percentage: 99  %

VIMS rnoi; COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALIVE DEAD 040 Channel catfish lctalurus punct~tus 200-299 r;76 0 039 White catfish lctalurus catus 116 Brown bu 11 head lctalurus nebulas us 108 Golden shiner Notemigonus crysoleucas 110 Spottai 1 shiner Notropis hudson i us 060 American eel Anguilla rostrata 051 Gizzard shad Dorosoma ceoedianum 275 Threadfin shad Dorosoma petenense 80-99.100-119 288 0 026 Alewife Alosa pseudoharengus 60-79 lhh 0 027 Blueback he rri na Alosa aestival is 037 Atlantic menhaden Brevoortia tyrannus 80-99 12,672 lhh 103 Bay anchovy Anchoa mitchilli 149, Tidewater silverside Menidia beryl Ii na l'iO Atlantic silverside Menidia menidia I

5 Pumpkinseed Lepomis gibbosus 032 White perch Marone americana 033 Spot Leiostomus xanthurus 80-99 111.18h 288 005 Atlantic croaker Micropogon undulatus 151 Hogchoker Trinectes maculatus 60-79 11,1, 0 196 Atlantic needlefish Strongylura marina 200-299 lhh 288 009 Bluefish Pomatomus saltatrix lh0-199 1,008 14h 011 Harvestfish Peorilus aleoidotus uo-s9 S.18u 0 14h Naked goby Gobiosoma bosci 20-39 576 0 I

TOTAL 151,920 864 R - 9/75 3.6.18

SURRY POWER STATION Ave. No. Circ. Pumps: 8 LOW LEVEL WEEKLY REPORT Temperature Min-Max: 26.1 - 29.3 Salinity Min - Max: 11.7 - 13.2 4ltek Of August 14 Through August 20, 1977 Survival Percentage: 98  %

VIMS rnni: COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALIVE DEAD 040 Channel catfish lctalurus punctatus 039 White catfish lctalurus catus 116 Brown bullhead lctalurus nebulosus 108 Golden shiner Notemigonus crysoleucas 110 Spottai 1 shiner Notropis hudsonius 060 American eel Anguilla rostrata 200-299 144 0 051 Gizzard shad Dorosoma cepedianum 140-199 144 0 275 Threadfin shad Dorosoma petenense 80-99 1.440 0 026 Alewife Alosa pseudoharengus 027 Blueback he rri nq Alosa aestival is 0~7 Atlantic menhaden Brevoortia tyrannus 100-119 7 .612 0 103 Bay anchovy Anchoa mi tchi 11 i 20-39 1,008 0 149 Tidewater silverside Menidia beryl 1 i na 150 Atlantic silverside Menidia menidia 35 Purriokinseed Lepomis gibbosus 032 White perch Marone americana 033 Spot Leiostomus xanthurus 80-99 31.248 576 005 Atlantic croaker Micropogon undulatus 120-139 576 0 151 Hog choker Trinectes maculatus 009 Bluefish Pomatomus saltatrix 11io-199,300-399 288 288 011 Harvestfish Peprilus alepidotus 40-59 13,680 0 007 Weakfish Cynoscion regalis uo-~9 861.i. 0 11i4 Naked goby Gobiosoma bosci 20-39.40-59 1.440 0 131 Northern pipefish Syngnathus fuscus 100-119 288 0 028 Hickory shad Alosa mediocris 200-299 0 288 R - 9/75 TOTAL 58,752 1,152 3.6.19

SURRY POWER STATION Ave. No. Circ. Pumps: 8

.k LOW LEVEL WEEKLY REPORT Temperature Min- Max: 2J.6 - 27.0 Salinity Min - Max: 12.0 - lJ.4 Of August 21 Through August 27, 1977 Survival Percentage: _...:;.9...:;.9__ O/o VIMS rnrw COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALIVE DEAD 040 Channel catfish lctalurus ounctatus 039 White catfish lctalurus catus 116 Brown bu 11 head lctalurus nebulosus 140-199 lhli. 0 108 Golden shiner Notemigonus crysoleucas 110 Spottai I shiner Notropis hudsonius 060 American eel Anguilla rostrata 051 Gizzard shad Dorosoma ceoedianum 14Q-199 144 0 275 Threadfin shad Dorosoma oetenense 80-99 7,056 0 026 Alewife Alosa pseudoharengus 80-99 288 0 027 BI ueback herring Alosa aestival is 037 Atlantic menhaden Brevoortia tyrannus 80-99.100-119 19.008 0 103 Bay anchovy Anchoa mitchill i 60-79 1. 728 432 149 Tidewater si lverside Menidia beryl Ii na 150 Atlantic silverside Menidia menidia 60-79 576 0 5 Pumpkinseed Lepomis qibbosus 032 White perch Mo rone ame r i <:an a 033 Spot Leiostomus xanthurus 80-99 73,='372 576 005 Atlantic croaker Micropogon undulatus 120-119 288 0 151 Hog choker Trinectes maculatus 40-59 144 0 196 Atlantic needlafish Strongylura marina 200-299 576 0 204 Crevalle jack Caranx hippos 40-59 288 0 207 Lookdown Selene vomer 60-79 288 0 009 Bluefish Pomatomus saltatrix 140-199,200-299 432 0 011 Harvestfish Peprilus alepidotus 40-59 14,832 0 007 Weakfish Cynoscion regalis 40-59 2,732 0 144 Naked goby Gobiosoma bosci 20-39 864 0 004 Butterfish Peprilus triacanthus 60-79 144 0 R - 9/75 TOTAL 123.,408 1,008 3.6.20

. 8 SURRY POWER STATION Ave. No. Circ. Pumps:

LOW LEVEL WEEKLY REPORT Temperature Min-Max: 26.0 - 27.8 Salinity Min- Max: 11.9 - 12. 7

. k Of August 28 Through September 3, 1977 Survival Percentage: 97  %

VIMS

• r.nn i= COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALIVE DEAD 040 Channel catfish lctalurus punctatus 039 White catfish lctalurus catus 116 Brown bullhead lctalurus nebulosus 120-139,140-199 288 0 108 Golden shiner Notemigonus crysoleucas 110 Spottai 1 shiner Notropis hudsonius 060 American eel Anguilla rostrata 051 Gizzard shad Dorosoma cepedianum 140-199 432 0 275 Threadfin shad Dorosoma petenense 60-79 1,008 0 026 Alewife Alosa pseudoharengus 027 Blueback herrinq Alosa aestival is 017 Atlantic menhaden Brevoortia tvrannus 80-99 6.912 576 103 Bay anchovy Anchoa mitchill i 40-59.80-99 0 288 149 Tidewater si ]versicle Menidia beryl] i na 150 Atlantic si ]versicle Menidia meni di a Pumpkinseed Lepomis qibbosus 9i032 White perch Marone americana 033 Spot Leiostomus xanthurus 80-99 20,880. 11.4 005 Atlantic croaker Micropogon undulatus 140-199 288 0 151 Hog choker Trinectes maculatus 011 Harvestfish Peorilus alepidotus 60-79 2.304 0 064 Atlantic spadefish Chaetodipterus faber 20-39 144 0 144 Naked goby Gobiosoma bosci 20-39,h0-59 3,600 0 003 Sum.'ller flounder Paralichthys dentatus 200-299 288 0

• • --l R - 9/75 TOTAL 36,14h 1,008 3.6.21

SURRY POWER STATION Ave. No. Circ. Pumps: 8 LOW LEVEL WEEKLY REPORT Temperature Min-Max: 25.7 - 30.1 Salinity Min - Max: 13.0 - 14.2

. k Of September 4 Through September 10, 1977 Survival Percentage: 98  %

VIM:i rnn~ COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALIVE DEAD 040 Channel catfish lctalurus punctatus 039 White catfish lctalurus catus 116 Brown bul I head lctalurus nebulosus 108 Golden shiner Notemi genus cry sol eucas 110 Spottai I shiner Notropis hudsonius 060 American eel Anquilla rest rat a 300-399 288 0 051 Gizzard shad Dorosoma ceoedianum 140-199 864 0 275 Threadfin shad Dorosoma oetenensa 80-99 5,040 0 026 Alewife Alosa pseudoharengus 027 Blueback herrinq Alosa aestivalis 037 Atlantic menhaden Brevoortia tyrannus 100-119 76;,752 864 103

• Bay anchovy Anchoa mi tch i 11 i 60-79 4,608 1.296 149 Tidewater silverside Menidia beryl l i na 150 Atlantic silverside Menidia menidia 60-79 576 0 5 Pumokinseed Leoomis qibbosus 032 White perch Mo rone ame r i can a 033 Spot Leios~omus xanthurus 80-99 40,032 720 005 Atlantic croaker Micropogon undulatus 151 Hog choker Trinectes maculatus 60-79 2,304 0 148 Rough silverside Membras martinica 60-79,80-99 144 14h 011 Harvestfish Peprilus alepidotus 40-59 2,4h8 144 007. Weakfish Cynoscion regalis 40-59.60-79 576 0 144 Naked goby Gobiosoma bosci 40-59 864 0 004 Butterfish Peprilus triacanthus 40-59 144 0 I

R - 9/75 TOTAL 134.,640 3,168 3.6.22

SURRY POWER STATION Ave. No. Circ. Pumps: 6 '

LOW LEVEL WEEKLY REPORT Temperature Min- Max: 23.0 - 25.6 Salinity Min - Max: 13.3 - 14.5 ek I

Of September 11 Th rough September 17, 1977 Survival Percentage: 99  %

VIMS .

rnni= COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALIVE DEAD 040 Channel catfish lctalurus punctatus 039 White catfish lctalurus catus 116 Brown bullhead lctalurus nebulosus 140-199 288 0 108 Golden shiner Notemigonus crysoleucas 110 Spottai 1 shiner Notropis hudsonius 060 Ameri c*an eel Anquilla rostrata 200-299 288 0 051 Gizzard shad Dorosoma ceoedianum 140-199 1~1,2 0 275 Threadfin shad Dorosoma petenense 80-99 10,944 0 026 Alewife Alosa pseudoharengus 60-79 l44 0 027 B1ueback herrina Alosa aest*ivalis 60-79 J.h4. : 0 037 Atlantic menhaden Brevoortia tyrannus 100-119 25,488 288 103 Bay anchovy Anchoa mi tch i 11 i 40-S9 4,032 114 149 Tidewater silverside Menidia beryl I ina l SO Atlantic silverside Menidia men i'd i a 5 Puniokinseed Lepomis gibbosus 120-139 144 0 032 White perch Merone americana 033. Spot Leiostomus xanthurus 80-99 13,968 0 005 Atlantic croaker Micropogon undulatus l40-l99 576 0 151 Hog choker Trinectes maculatus 20-39 144 0 122 Mummichog Fundulus heteroclitus 40-59 2,592 0 148 Rough silverside Membras martinica 60-79 576. 0 009 Bluefish Pomatomus saltatrix 300-399 144 0 011 Har,restfish Peprilus alepidotus 40-59 1,296 o*

144 Naked goby Gobiosoma bosci 40-S9 432 0 a

62,352 432 R - 9/75 TOTAL 3.6.23

SURRY POWER STATION Ave. No. Circ. Pumps: 6 LOW LEVEL WEEKLY REPORT. Temperature Min-Max: 24.7 - 25.8 Salinity Min- Max: 13,3 4 ek Of September 18 Through September 24, 1977 Survival Percentage: 97  %

VIMS rnnl=' COMMON NAME SCIENTIFIC NAME MO.OAL SIZE (mm) ALIVE DEAD 040 Channel catfish lctalurus punctatus 039 White catfish I eta I urus catus 116 Brown bu 11 head lctalurus nebulosus 108 Go 1den sh i ne r Notemigonus crysoleucas 110 Spottail shiner Notropis hudson i us 060 American eel Anquilla rostrata 051 Gizzard shad Dorosoma ceoedianum 120-139 576 0 275 Threadfin shad Dorosoma petenense 80-99 3,168 0 026 Alewife Alosa pseudoharengus 027 B1ueback he rri nq Alosa aestival is o*u Atlantic menhaden Brevoortia tyrannus 120-139 2,304 0

\

103 Bay anchovy Anchoa mi tch i 11 i 149 Tidewater silverside Menidia beryl 1 i na ISO Atlantic silverside Menidia menidia lls Pumokinseed Leoomis qibbosus 032 White perch *Morone americana 033 Spot > Leiostomus xanthurus 80-99 20.,160 1.008 005 Atlantic croaker Micropogon undulatus 151 Hog choker Trinectes maculatus 122 Mwnrnichog Fundulus'heteroclitus 40-59 ll.,232 0 120 Sheepshead minnow Cyprinodon variegatus 40-59 144 0 009 Bluefish Pomatomus saltatrix 200-299 144 0 011 Harvestfish Peprilus alepidotus 100-119 432 0 144 Naked goby Gobiosoma bosci 20-39 144 0 071 Northern searobin Prionotus carolinus 20-39 144 0 TOTAL 38,448 1,008 R - 9/75 3.6.24

SURRY POWER STATION Ave. No. Circ. Pumps: 6 LOW LEVEL WEEKLY REPORT Temperature Min- Max: 22.1 - 26.0 Salinity Min - Max: lJ.J - 16.9

- ~ Of September 25 Through October 1, 1977 Survival Percentage: _.._9....9__ /o 0 VIMS rnoE COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALIVE DEAD 040 Channel catfish lctalurus punctatus 039 White catfish lctalurus catus 116 Brown bu 1lhead lctalurus nebulosus 120-139 288 0 108 Golden shiner Notemigonus crysoleucas 110 Spottai I shiner Notropis hudsonius \

060 American eel Anguilla rest rat a 05]\ Gizzard shad Dorosoma ceoedianum lL.0-199 2.304 0 275 Threadfin shad Dorosoma petenense 80-99 3,888 0 026 Alewife Alosa pseudoharengus 027 Blueback herrino Alosa aestival is 037 Atlantic menhaden Brevoortia tyrannus 100-119 2.736 0 103 Bay anchovy Anchoa mitchilli 40-59 4,608 288 149 Tidewater silverside Menidia beryl l i na lSO Atlantic silverside Menidia menidia 80-99 720 0 5 Punipkinseed Lepomis gibbosus 032 White perch Merone ameri cana 033 Spot Leiostomus xanthurus 80-99 18,576 0 005 Atlantic croaker Micropogon undulatus lL.0-199 288 0 151 Hog choker Trinectes maculatus 052 Carp Cyprinus carpio 120-139,140-199 288 0 122 MUIIIIllichog Fundulus hetaroclitus h0-59 576 0 231 Striped mullet Mugil cephalus lL.0-199 1hh 0 011 Harvestfish Peprilus alepidotus 80-99 288 0 001 Summer flounder Paralichthvs dentatus 200-299 1J,), 0 071 Northern searobin Prionotus carolinus 20-39 288 0 r

II R - 9/75 TOTAL 35,136 288 I 3.6.25

Ave. No. Circ. Pumps: 6 SURRY POWER STATION LOW LEVEL WEEKLY REPORT Temperature Min- Max: 18. 7 - 21.3 Salinity Min - Max: 12.1 - 15.2

~ k Of October 2 Through October 8, 1977 Survival Percentage: 98  %

VIMS cnni: COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) AL I VE DEAD 040 Channel catfish lctalurus punctatus 039 White catfish *1 eta 1urus catus 116 Brown bullhead lctalurus nebulosus 108 Golden shiner Notemigonus crysoleucas 110 Spottai 1 shiner Notropis hudsonius 060 American eel Anquilla ros t rat a 200-299 720 0 051 Gizzard shad Dorosoma cepedianum 140-199 288 0 275 Threadfin shad Dorosoma petenense 80-99 7,776 0 026 Alewife Alosa pseudoharengus 027 Blueback herrinq Alosa aestival is 037 Atlantic menhaden Brevoortia tyrannus 100-119 16,8).).8 288 103 Bay anchovy Anchoa mi tch i 11 i 60-79 3,312 lh4 149 Tidewater silverside Menidia beryl] i na ISO Atlantic si lverside Menidia menidia 5 Pumokinseed Lepomis qibbosus 120-139 lhh 0 032 White perch Marone americana lh0-199 288 0 033 Spot Leiostomus xanthurus 80-99 4.752 288 005 Atlantic croaker Micropogon undulatus 151 Hog choker Trinectes maculatus 60-79.80-99 432 0 122 Mummichog Fundulus heteroclitus 60-79 144 0 148 Rough silverside Membras martinica 60-79 288 0 009 Bluefish Pomatomus saltatrix 60-79,200-299 288C.; 0 011 Harvestfish Peprilus alepidotus 60-79 1,296 0 031 Striped bass Marone saxatilis 80-99 lhh 0 I

007 Weakfish Cynoscion regalis 200-299 288 0 R - 9/75 3.6.26 TOTAL 37,008 720

SURRY POWER STATION Ave. No. Circ. Pumps: 6 LOW LEVEL WEEKLY REPORT Temperature Min- Max: 15.8 - 18.7 Salinity Min - Max: 15.4 - 16.8

~ k Of October 9 Through October 15, 1977 Survival Percentage:

___98__ a/a VIMS r'.0Df COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALIVE DEAD 040 Channel catfish lctalurus punctatus 039 White catfish lctalurus catus 116 Brown bu 11 head lctalurus nebulosus 108 Golde.n shiner Notemigonus crysoleucas 110 Spottai 1 shiner Notropis hudsonius 060 American eel Anquilla rostrata 200-299 288 0 051 Gizzard shad Dorosoma ceoedianum 140-199. 1,152 0 275 Threadfin shad Dorosoma petenense 80-99 4,032 144 026 Alewi.fe Alosa pseudoharengus 80-99 432 0 027 Blueback herrinq Alosa aestival is 037 Atlantic menhaden Brevoortia tvrannus 100-119 61,056 288 103 Bay anchovy Anchoa mi tch i 11 i 60-79 105,120 3,456 149 Tidewater silverside Menidia beryl I ina ISO Atlantic silverside Menidia menidia 60-79 2.016 0 41ls Puniokinseed Lepomis gibbosus 032 White perch Marone ame*ri cana 140-199 144 0 033 Spot Leiostomus xanthurus 80-99 32.976 0 005 Atlantic croaker Micropogon undulatus 140-199 576 0 151 Hogchoker Trine~tes maculatus 120-139 2,448 0 122 Mummichog Fundulus heteroclitus 40-59,60-79 864 0 148 Rough silverside Membras martinica 60-79 576 0 231 Striped mullet Mugil cephalus 140-199 144 0 009 Bluefish Pomatomus saltatrix 200-299 720 0 031 Striped bass Merone saxatilis 140-199 288 0 007 Weakfish Cynoscion regalis 100-119 144 0 213 Silver perch Bairdiella chrysura 80-99 144 0 144 Naked goby Gobiosoma bosci 20-39 1.872 0 oo"3 Summer flounder Paralichthys dentatus 200-299 288 0 216 Pinfish Lagodon rhomboides 140-199 288 0 152 Blackcheek tonguefish Symphurus plagiusa 80-99 0 144 215,568 4,032 R - 9/75 3,6.27 TOTAL

SURRY POWER STATION Ave. No.. Circ. Pumps: 7 LOW LEVEL WEEKLY REPORT. Temperature Min-Max*: 13.1 - 15.3 Salinity Min - Max: 13.0 - 15.6 4itek Of October 16 Through October 22, 1977 Survival Percentage: 99  %

VIMS rnni=

• COMMON NAME SCIENTIFIC NAME MODAL SIZE. (mm) ALIVE DEAD 040 *Channel catfish lctalurus punctatus 039 White catfish lctalurus cat us 116 Brown bullhead lctalurus nebulosus 108 Golden shiner Notemigonus crysoleucas 11 O Spottai 1 shiner Notropis hudsonius 060 American eel Anqui 11 a rost rata 140-199 144 0 051 Gizzard shad Dorosoma ceoedianum 140.h99 3,744 0 275 Threadfin shad Dorosoma petenense 80-99 39,600 1,008 026 Alewife Alosa pseudoharengus 027 Blueback herrinq Alosa aestivalis 60-79 1,296 0 0~7 Atlantic menhaden Brevoortia tyrannus 80-99 73,728 1,008 103 Bay anchovy Anchoa mi tch i 11 i 40-59 13,824 144 I

149 Tidewater silverside Menidia beryllina 40-59 720 0 150 Atlantic si lverside Menidia menidia ao;..99 2,304 0 35 Purriokinseed Lepomis qibbosus 60-79 288 0 032 White perch Marone americana 140-199 2,160 0 033 Spot Leiostomus xanthurus 80-99 59,904 288 005 Atlantic croaker Mi. c ropogon undulatus 40-.59 144 0 151 Hog choker Trinectes maculatus 80-99 2,304 0 122 Mununichog Fundulus heteroclitus 60-79 1,872 0 148 Rough silverside Membras martinica 60-79 720 288 011 Harvestfish Peprilus alepidotus .80-99 1,1.52 0 031 Striped* bass Merone saxatilis 60-79,200-299 432 0 003 Summer flounder Paralichthys dentatus 120-139 288 0 007 Weakfish Cynoscion regalis 100-119 288 0 071 Northern searobin Prionotus carolinus 40-.59 144* 0 i

TOTAL 20.5,056 2,736 R - 9/75 3.6.28

SURRY POWER STATION Ave. No. Circ. Pumps:

LOW LEVEL WEEKLY REPORT. Temperature Min- Max: 15.0 - 17.1

11. 7 - 15.0 eek Of October_ 23 Through October 29, 1977 Salinity Min- Max:

Survival Percentage: 94 . %

VIMS rnni::

• COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALIVE DEAD 040

• Channel catfish l~talurus punctatus 039 White catfish lctalurus catus 116 Brown bullhead lctalurus nebulosus 108 Golden shiner Notemigonus crysoleucas 11 O Spottai 1 shiner Notropis hudsonius 060 American eel Anqu i 11 a ros trata 140-199,200-299 576 0 051 Gizzard shad Dorosoma cepedianum 140-199 144 0 275 Threadfin shad Dorosoma petenense 80-99 10.224 1.152 026 Alewife Alosa pseudoharengus 027 Blueback herrinq Alosa aestival is . 60-79* 1,440 144 .

017 Atlantic menhaden Brevoo rt i a ty ran nus 100-119 43.056 2.304 103 Bay anchovy Arichoa mitchilli 40-59,60-79 10,656 1,872 I

149 Tidewater silverside Menidia beryll ina 150 Atlantic silverside Men id i a men id ia 80-99 1.296 0 35 Purriokinseed Lepomis qibbosus 032 White perch Marone americana 140-19~ ' 576 0 033 Spot Leiostomus xanthurus 80-99 27,792 288 005 Atlantic croaker Micropogon undulatus 140-199  !.l.32 0 151 Hog choker Trinectes maculatus 40-59 lhh 0 122 Mummichog Fundulus heteroclitus 60-79 2.736 0 lh8 Rough silverside Membras martinica 60-79 2.592 lhh 009 Bluefish Pomatomus saltatrix 200-299 2,160 0 007 Weakfish Cyn9scion regal~s 100-119 7,056 432 144 Naked goby Gobiosoma bosci h0-59 lhh 0 003 Summer flounder Paralichthys dentatus 200-299 0 288 058 Spotted seatrout Cynoscion nebulosus 200-299 14h 0 071 Northern searobin Pri9notus carolinus h0-59 lh4 0 238 Orange filefish Aluterus schoepfi h0-59 432 0 R - 9/75 TOTAL 111,74h 6,62h 3;6.29

I SURRY POWER STATION Ave. No. Circ. Pumps: 7 LOW LEVEL WEEKLY REPORT Temperature Min- Max: 14.9 - 17.0 Salinity Min- Max: 10.8 - 12.9

~~ Of October 30 Through November 5, 1977

• Survival Percentage: 97  %

VIMS r.onF COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALI VE DEAD 040 Channel catfish lctalurus ounctatus 200;;.299 288 0 039 White catfish lctalurus catus I 16 Brown bu 11 head lctalurus nebulosus 108 Golden shiner Notemigonus crysoleucas 110 Spottail shiner Notropis hudsonius 060 American eel Anouilla rostrata 200-299 r;76 0 051 Gizzard shad Dorosoma ceoedianum 120-139,200-299 1,008 144 275 Threadfin shad Dorosoma oetenense 80-99 17,568 288 026 Alewife Alosa pseudoharengus 80-99 288 0 027 Blueback herrino Alosa aestival is 60-79 288 0 037 Atlantic menhaden Brevoortia tvrannus 100-119 21.456 0 103 Bay anchovy Anchoa mi tch i 11 i 60-79 2.880 432 149 Tidewater silverside Menidia beryl Ii na ISO Atlantic silverside Menidia menidia 80-99 1.008 0 35 Punipkinseed Lepomis qibbosus 80-99 576 0 032 White perch Merone americana 140-199 0 144 033 Spot Leiostomus xanthurus 80-99 6,048 144 005 Atlantic croaker Micropogon undulatus 151 Hog choker Trinectes maculatus 120-139 720 0 122 Mummichog Fundulus heteroclitus 60-79 7,632 0 120 Sheepshead minnow Cyprinodon variegatus 40-c;9 288 0 148 Rough silverside Membras martinica 60-79 3,744 576 009 Bluefish Pomatomus saltatrix 120-139.140-199 576 0 231 Striped mullet Mugil cephalus 140-199 288 0 011 Harvestfish Peprilus alepidotus 80-99 144 0 351 Gray snapper Lutjanus e:riseus 120-139 144 0 007 Weakfish Cynoscion regalis 80-99,120-139 288 0 TOTAL 65,808 1,728 R - 9/75 3.6.30

SURRY POWER STATION Ave. No. Circ. Pumps: 7 LOW LEVEL WEEKLY REPORT Temperature Min-Max: 17.2 - 18.7 Salinity Min - Max: 3.5 - 10.8

~~ Of November 6 Through November 12, 1977 Survival Percentage: __._9__

9 __ 0/o VIMS rnni= COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALIVE DEAD 040 Channel catfish lctalurus punctatus 200-299 288 0 039 White catfish lctalurus catus 116 Brown bu 11 head lctalurus nebulosus 108 Golden shiner Notemigonus crysoleucas 110 Spottai l shiner Not rap is hudsonius 060 American eel Anquilla rostrata 051 Gizzard shad Dorosoma cepedianum 80-99 288 0 275 Threadfin shad Dorosoma petenense 80-99 18,144 0 026 Alewife Alosa pseudoharengus 80-99,100-119 2,016 0 027 Blueback herrinq Alosa aestival is .60-79 2,016 576 O'H Atlantic menhaden Brevoortia tyrannus 100-119 71.L.24 288 103 Bay anchovy Anchoa mi tch i 11 i 40-59 2,736 432

.5 149 Tidewater silverside Menidia beryl Ii na 60-79 0 lL.L.

ISO Atlantic silverside Menidia menidia 60-79 720 0 Pumokinseed Lepomis qibbosus 032 White perch Marone americana 120-139 8,928 0 033 Spot Leiostomus xanthurus 80-99 18.141.i. 288 005 Atlantic croaker Micropogon undulatus 151 Hog choker Trinectes maculatus 100-119 864 0 122 Mwrnnichog Fundulus heteroclitus 60-79 124,272 57.6 148 Rough silverside Membras martinica 60-79 1,)440 0 031 Striped bass Merone saxatilis 60-79,140-199 576 0 351 Gray snapper Lutjanus griseus 80-99 144 0 007 Weakfish Cynoscion regalis 80-99 288 0 144 Naked goby Gobiosoma bosci 20-39 144 0 003 Summer flounder Paralichthys dentatus 140-199 288 0 105 Chain pickerel Esox niger 300-399 288 0 R - 9/75 TOTAL 253,008 2,304 3.6.31

SURRY POWER STATION Ave. No. Circ. Pumps= 5 LOW LEVEL WEEKLY REPORT Temperature Min-Max: 11.4 - 14.2 Salinity Min-Max: 2.2 3.0

~ k Of;. November 13 Through November 19, 1977 Survival Percentage: 98 0

/o VIMS r.nnr:: COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALI VE DEAD 040 Channel catfish lctalurus punctatus 200-299 2.592 0 039 White catfish lctalurus catus 200-299 144 0 116 Brown bu 1lhead lctalurus nebulosus 108 Golden shiner Notemigonus crysoleucas 110 Spottai 1 shiner Notropis hudsonius 060 American eel Anquilla rostrata 200-299 1,584 0 051 Gizzard shad Dorosoma ceoedianum 120-139 3,456 0 275 Threadfin shad Dorosoma petenense 60-79 25,776 288 026 Alewife Alosa pseudoharengus 60-79,80-99 432 0 027 Blueback herrinq Alosa aestival is 60-79 16,992 144 037 Atlantic menhaden Brevoortia tyrannus 100-119 5,184 0 103 Bay anchovy Anchoa mi tch i 11 i h0-59 3.744 1.296 149 Tidewater silverside Menidia beryl Ii na 1.:;o Atlantic silverside Menidia menidia 80-99 288 144 35 Purriokinseed Lepomis qibbosus 60-79 1,008 0 032 White perch Marone americana 80-99 33,840 288 033 Spot Leiostomus xanthurus 80-99 33.552 720 005 At !antic croaker Micropogon undulatus 151 Hog choker Trinectes maculatus 40-59,100-ll9 576 0 052 Carp Cyprinus carpio 100-119 144 0 122 Mummichog Fundulus heteroclitus 60-79 34.704 0 136 Bluegill Lepomis macrochirus h0-59 576 0 031 Striped bass Marone saxatilis 120-139 144 0 41 R - 9/75 TOTAL 16h,736 2,880

- 3.6.32

SURRY POWER STATION Ave. No. Circ. Pumps: 5 LOW LEVEL WEEKLY REPORT .. Temperature Min- Ma.x: ll .. l - 12.1.

Salinity Min - Max: 2.9 - 4.5 eek Of November 20 . . Through Noveniber 26, 1977 Survival Percentage: *91  %

VI s COMMON NAME* MODAL SIZE (mm) rnni= SCIENTIFIC NAME ALIVE DEAD 040 Channel catfish lctalurus punctatus 200-299 576 0 039 White catfish lctalurus catus 116 Brown bu 11 head lctalurus nebulosus 108 Golden shiner Notemigonus crysoleucas 110 Spottai l shiner Not rap is hudsonius 060 American eel Anquilla rostrata 200-299 288 0 051 Gizzard shad Dorosoma ceoedianum 120-139 3,312 0 275 Threadfin shad Dorosoma petenense 60-79 3,744 O*

026 Alewife Alosa pseudoharengus 80-99 288 0 027 B1ueback herrinq Al as a aes t i va 1is 60-79 7,344 576 O'H Atlantic menhaden Brevoortia tyrannus 100:..119 4,464 0 103 Bay anchovy Anchoa mitchilli 40-59 10.080 l.L.40 149 Tidewater silverside Menidia beryl 1 i na / 60-79 288 0 150 Atla6tic si lverside Menidia menidia

.35 Pumokinseed Leoomis gibbosus 80-99 288 0 032 White perch Mo rone ame r i can a 60-79 8,064 0 033 Spot Leiostomus xarithurus 80-99 15,264 0 005 Atlantic croaker Micropogon undulatus 151 Hog choker Trinectes maculatus 60-79 720 0 136 Bluegill Lepomis macrochirus 60-79 288 0 144 Naked goby Gobiosoma bosci 20-39 288 0 122 Mummichog Fundulus heteroclitus 40-59 1,296 0 I

TOTAL 56,592 2,016 R - 9/75 3.6.33

SURRY POWER STATION Ave. No. Circ. Pumps: 5 LOW LEVEL WEEKLY REPORT Temperature Min-Max: 7.6 - 9.3 Salinity Min- Max: 1~7 - 4.3

~ k Of November 27 Through December 3, 1977 Survival Percentage: 96 0

/o VIMS rnnF . COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALIVE .DEAD 040 Channel catfish lctalurus ounctatus 200-299 144 0 039 White catfish lctalurus catus 116 Brown bullhead lctalurus nebulosus 108 Golden shiner Notemigonus crysoleucas 11 O Spottai 1 shiner Notropis hudsonius 060 American eel Anguilla rostrata 200-299 288 0 051 Gizzard shad Dorosoma ceoedianum 100-119 7,056 144 275 Threadfin shad Dorosoma oetenense 60-79 7,488 288 026 Alewife Alosa pseudoha rengus 80-99 144 0 027 Blueback herrina Alosa aestival is 60-79 9. 792 720 037 Atlantic menhaden Brevoortia tvrannus 100~119 16,368 0 103 Bay anchovy Anchoa mitchilli 40-59 5,184 288 149 Tidewater si lverside Menidia beryllina 60-79 1,296 0 1.:;o Atlantic silverside Menidia menidia 80-99 lh4 0 35 Pumpkinseed Lepomis qibbosus 032 White perch Mo rone ame r i can a 80-99 43,h88 2,h48 033 Spot Leiostomus xanthurus 80-99 37,584 576 40-59,60-79 288 288 005 Atlantic croaker

. Micropogon undulatus 151 Hog choker Trinectes maculatus 60-79 864 0 122 Murnmichog Fundulus heteroclitus 60-79 720 0 136 Bluegill Lepomis macrochirus 40-59 144 0 031 Striped bass Marone saxatilis 80-99 144 0 I

- 125,136 TOTAL 4,752 R - 9/75 3.6.34

SURRY POWER STATION Ave. No. Circ. Pumps: 6 LOW LEVEL WEEKLY REPORT . Temperature Min-Max: 6.Q 2o7 Salinity Min-Max= 1110 3.2 4itek Of December 4 Through. December 10,1977 Survival Percentage: 26 O/o-VIMS l"nnE COMMON NAME SCIENTIFIC NAME MODAL*SIZE (mm) ALI VE DEAD 040 Channel catfish lctalurus punctatus . 200-299 144

/

0 039 White catfish lctalurus catus ,

116 Brown bu 1 lhead lctalurus nebulosus 140-199 288 0 108 Golden shiner Notemigonus crysoleucas 110 Spottai 1 shiner Not rop is hudsonius 060 American eel Anquilla rostrata 200-299 864 0 051 Gizzard shad Dorosoma ceoed.i anum 100-119 17,712 144 275 Threadfin shad Dorosoma petenense 60-79 3,888 288 026 Alewife Alosa pseudoharengus 80-99 144 0 027 B1ueback herrina Alosa aestival is 60-79 16,416 144 037 Atlantic menhaden Brevoortia tyrannus 100-119 8,352 lh4 103 Bay anchovy Anchoa mitchilli 40-59 4,320 2,016 149 Tidewater silverside Menidia beryllina 60-79 576 576 I i;o . Atlantic silverside Menidia menidia 80-99 1,872 0 4l35 Pumokinseed Lepomis gibbosus 864 032 White perch Marone ameri cana 80-99 46,368 033 Spot Leiostomus ' xanthurus 80-99 19,152 288 005 Atlantic croaker Micropogon undulatus 40-59 1,008 144 151 Hog choker Trinectes maculatus 40-59 80-99 576 0 122 Mummichog Fundulus heteroclitus 60-79 21736 0 120 Sheepshead minnow Cyprinodon variegatlls 40-59 144 0 031 Striped Bass Merone saxatilis

• 120-139 2:88 0

- I R - 9/75 TOTAL 124,848 4,608 3,6.35

SURRY POWER STATION Ave. No. Circ. Pumps: 7 LOW LEVEL WEEKLY REPORT Temperature Min-Max: ----'-4_.8_- 6.8 Salinity Min - Max: 1.1 - 3 °4

~ek Of December 11 Through December 17, 1977 Survival Percentage: 92  %

VIMS rnni: COMMON NAME SC I ENTI FI C NAME MODAL SIZE (mm) ALI VE DEAD 040 Channel catfish lctalurus punctatus

~

039 White catfish lctalurus catus 116 Brown bu 11 head I eta 1urus nebulosus 108 Golden shiner Notemigonus crysoleucas 110 Spottai l shiner Not r*op is hudsonius 060 American eel Anguilla ros t rat a 500+ 144 0 051 Gizzard shad Dorosoma ceoedianum 100-119 15,408 864 275 Threadfin shad Dorosoma petenense 60-79 4,608 576 026 Alewife Alosa pseudoharengus 100-119 432 0 027 B1ueback herrino Alosa aestival is 60-79 61,920 2,016 037 Atlantic menhaden Brevoortia tvra~nus 100-119 141.i lb.4 103 Bay anchovy Anchoa mi tch i 11 i 60-79 576 0 149 Tidewater silverside Menidia beryl l i na 60-79 576 0

.5ISO 032 Atlantic si lverside Pumokinseed White perch Menidia menidia Lepomis qibbosus Marone americana 80-99 80-99 720 31,392 11.t.4 5,616 033 Spot Leiostomus xanthurus 80-99 2,160 0 005 Atlantic croaker Micropogon undulatus 20-39 720 288 151 Hog choker Trinectes maculatus 40-59 0 288 231 Striped mullet Mugil cephalus 140-199 288 0 122 Mwnmichog Fundulus heteroclitus 80-99 0 144 3.6.36 TOTAL 119,088 10,08e R - 9/75

SURRY POWER STATION Ave. No. Circ. Pumps: 7 LOW LEVEL WEEKLY REPORT Temperature Min-Max: 6.1 - 7.3

~ k Of December 18 Through December 24, 1977 Salinity Min - Max:

Survival Percentage:

1.4 - 4.2 98 VIMS rnni: COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALI VE DEAD 040 Channel catfish lctalurus punctatus 039 White catfish lctalurus cat us 116 Brown bu 11 head lctalurus nebulosus 0

108 Golden shiner Notemi gonus cryso l eucas 110 Spottai 1 shiner Notropis hudson i us 060 American eel Anquilla ros t rat a 300-399 288 0 051 Gizzard shad Dorosoma ceoedianum 120-139 22,320 288 275 Threadfin shad Dorosoma petenense 60-79 4,752 576 026 Alewife Alosa pseudoharengus 027 Blueback herrinq Alosa aestival is 60-79 16.992 432 0°17 Atlantic menhaden Brevoortia tyrannus 80-99 9,360 1ti1.i 103 Bay anchovy Anchoa mi tch i 11 i 40-59 288 144 149 Tidewater silverside Menidia beryl l i na 60-79 1,41.i.O 288 150 Atlantic silverside Menidia menidia 80-99 3,312 288 35 Pumpkinseed Lepomis oibbosus 032 White perch Marone americana 80-99 102,21.i.o 288 033 Spot Leiostomus xanthurus 80-99 4.752 14L.

005 Atlantic croaker Micropogon undulatus L.0-59 2.592 141.i 151 Hog choker Trinectes maculatus 60-79.80-99 432 0 R - 9i75 3.6.37 TOTAL 168.,768 2,736

SURRY POWER STATION Ave. No. Circ. Pumps: 7 4.1 - 4.5 LOW LEVEL WEEKLY REPORT Temperature Min- Max: ---

_o.8 - 1.0 Salinity Min - Max: ---

flJk Of December 25 Through December 31, 1977 Survival Percentage: 94  %

VIMS

. rnnr:: COMMON NAME SCIENTIFIC NAME MODAL SIZE (mm) ALIVE DEAD 040 Channel catfish lctalurus punctatus 039 White catfish lctalurus catus 116 Brown bu 11 head lctalurus nebulosus 108 Golden shiner Notemigonus crysoleucas 110 Spottai I shiner Notropis hudsonius 060 American eel Anquilla ros t rat a 200-299 720 0 051 Gizzard shad Dorosoma cepedianum 100-119 10,944 576 275 Threadfin shad Dorosoma petenense 60-79 1,296 0 026 Alewife Alosa pseudoharengus 027 BI ueback herrinq Alosa aestival is 60-79 4,752 432 037 Atlantic menhaden Brevoortia tyrannus 80-99 288 0 103 Bay anchovy Anchoa mi tch i 11 i 40-59 0 432 149 Tidewater silverside Menidia beryl 1 i na 60-:79 288 0 150 Atlantic silverside Menidia menidia 5 Pumokinseed Lepomis qibbosus 032 White perch Marone ameri cana 60-79 8~352 288 033 Spot Leiostomus xanthurus 80-99 432 0 005 Atlantic croaker Micropogon undulatus 40-59 432 144 151 Hog choker Trinectes maculatus 60-79 288 0 231 Striped mullet Mugil cephalus 200-299 144 0 27,936 1,872 R - 9/75 3.6.38 TOTAL

Appendix 3.0 ECOLOGICAL STUDY e OF THE TIDAL SEGMENT OF THE JAMES RIVER ENCOMPASSING HOG POINT 1977 Final Technical Report*

Plankton, Benthos, and Fouling Organism Sections by R. A. Jordan, P.A. Goodwin, R. K. Carpenter, C. E. Sutton Virginia Institute of Marine Science Gloucester Point, Virginia 23062 February, 1978

• Study Sponsored by the Virginia Electric and Power Company

Contents Page No.

List of Tables iii List of Figures viii Introduction 1 Methods Station Locations 5 Sampling and Sample Analysis Methods 5 Sampling Design 11 Data Presentation and Analysis 14 Results - Plankton Studies Data Presentation 15 Phytoplankton Distribution Patterns 15 Zooplankton Distribution Patterns 19 Results - Benthos Study Data Presentation 44 Benthos Distribution Patterns 44 Results - Fouling Organisms Study 55 Conclusions 63 References 64 Appendix A Hydrographic Data Tables 65 Appendix B Biological Data Tables for the Plankton Studies 77 Appendix C Biological Data Tables for the Benthos Study 128 e

ii

List of Tables e TEXT Page No.

Table No. Title 1 Plankton Sampling Station Locations 6 2 Benthos and Fouling Plate Station Locations 8 3 Sunnnary of Biological Sampling Effort 12 4 Environmental Conditions During Plankton Sampling Runs, 1977 16 5 James River Phytoplankton ANOVA Sununary 2-23-77 21 6 James River Phytoplankton ANOVA Summary 4-13-77 23 7 James River Phytoplankton ANOVA Summary 5-12-77 25 8 James River Phytoplankton ANOVA Sununary 6-13-77 I

26 9 James River Phytoplankton ANOVA Sununary 7-12-77 28 10 James River Phytoplankton ANOVA Summary 7-21-77 29 e 11 James River Phytoplankton ANOVA Sununary 8-16-77 30 12 James River Phytoplankton ANOVA Summary 9-6-77 32 13 James River Phytoplankton ANOVA Summary 11-9-77 34 14 James River Zoo plankton. ANOVA Summary 2-23-77 35 15 James River Zoo plankton ANOVA "Sununary 4-13-77 36 16 James River Zooplankton ANOVA Summary 5-12-77 37 17 James River Zooplankton ANOVA Summary 6-13-77 38 18 James River Zooplankton ANOVA Summary 7-12-77 39 19 James River Zooplankton ANOVA Sununary 7-21-77 40 20 James River Zooplankton ANOVA Sununary 8-16-77 41 21 James River Zooplankton ANOVA Summary 9-6-77 42 22 James River Zoop}ankton ANOVA Sununary 11-9-77 43 iii

TEXT (cont.) Page No.

Table No. Title 23 Seasonal and Spatial Distributions of. Major Benthic Animals - 1977 47 24 Fouling Organisms 1977, Station DWS 57 25 Fouling Organisms 1977, Station CBN 59 26 Fouling Organism~ 1977, Station CBS 61 iv

List of Tables (cont.)

Appendix A Table No. Title Page No.

Al James River Hydrographic Data 1977, Plankton Sampling Runs 66 A2 James River Hydrographic Data 1977, Benthos Sampling Runs 71 V

List of Tables (cont.)

e Appendix B Table No. Title Page No.

Bl James River Chlorophyll Concentrations, 1977 78 B2 James River Phytoplankton Cell Counts, 1977 79 B3 James River Phytoplankton 2-23-77 80 B4 James River Phytoplankton 4-13-77 82 B5 James River Phytoplankton 5-12-77 83 B6 James River Phytoplankton 6-13-77 84 B7 James River Phytoplankton 7-12-77 86 B8 James River Phytoplankton 7-21-77 88 B9 James River Phytoplankton 8-16-77 89 BlO James River. Phytoplankton 9-6-77 91 Bll James River Phytoplankton 11-9-77 93 Bl2 James River Zooplankton February 23, -1977 94 Bl3 James River Zooplankton April 13, 1977 98 Bl4 James River Zobplankton May 12, 1977 102 Bl5 James River Zooplankton June 13, 1977 106 Bl6 James River Zoo plankton July 12, 1977 110 Bl7 Surry Zooplankton Entrainment 7-21-77 114 Bl8 James River Zooplankton August 16, 1977 116 Bl9 James River Zooplankton September 6, 1977 120 B20 James River Zooplankton November 9, 1977 124 vi

List of Tables (cont.)

Aeeendix C Table No. . Title Page No.

Cl James River Benthos; March 8, 1977 129 C2 JB111es River Benthos; April 25, 1977 131 C3 James Riv~r Benthos; June 20, 1977 133 C4 James River Benthos; July 14, 1977 135 cs James River Benthos; August 18, 1977 137 C6 James River Benthos; October 20, 1977 139 C7 Diversity and Related Parameters for Benthic Samples; March 8, 1977 141 CB Diversity and Related Parameters for Benthic Samples; April 25, 1977 142 C9 Diversity and Related Parameters for Benthic Samples; June 20, 1977 143 ClO Diversity and Related Parameters for Benthic Samples; July 14, 1977 144 Cll Diversity and Related Parameters for Benthic Samples; August 18, 1977 145 Cl2 Diversity and Related Parameters 'for Benthic Samples; October 20, 1977 146 vii

List of Figures Figure No. Title Page No.

1 Location of the Surry Power Station 2 2 Surry Power Station Cooling Water Canal System 4 Showing In-Plant Sampling Stations 3 Plankton Sampling Stations 7 4 Benthos and Fouling Plate Stations 9 5 Temporal Distribution of Rangia cuneata in the Study Area, May 1969 - Jan. 1978 46 viii

Introduction The Surry Power Station, operated by the Virginia Electric and Power Company, is located on a peninsula that extends into the James River on its south shore. The tip of the peninsula is known as Hog Point, and it is approximately 30 miles (48 km) upstream from Chesapeake Bay and 50 miles (80 km) downstream from Richmond (Fig. 1). The section of the river bordering this peninsula is the transition zone between fresh water and saline water, where the salinities encountered are near the tolerance minima for most estuarine and marine species and near the tolerance maxima for freshwater species. Therefore, the biological community consists of a few resident species that can tolerate the entire range of conditions, and of visitors from upstream that can survive until their tolerance

--- limits are exceeded. The region is biologically significant mainly as a nursery ground and migration corridor for fish species that are harvested elsewhere. The fish populations in 1

the _:vicinity of the power station have been monitored by VEPCO personnel. VIMS was engaged by VEPCO to monitor the lower trophic r levels, including the phytoplankton, zooplankton, benthic macro-invertebrates and fouling organisms. The monitoring study has been in progress since May, 1969, and intensified sampling programs for phytoplankton and zooplankton were conducted in the years 1975 through 1977. The present report covers the study period January through 1

2 SURRY POWER STATION Figure 1. Location of the Surry Power Station.

3

- December 1977.

• The first of the two units of the power plant began commercial operation in December 1972, the second in May 1973.

Together they require a cooling water flow of 106m~sec-1, which is pumped from the river on the downstream side of the peninsula into a 2.74 km long elevated intake canal in which it flows by gravity for approximately 33 minutes to the power plant (Fig. 2).

The water then flows by gravity through the condensers, where its temperature is raised a maximum of 8.3°C, into a 1 km long

/

sea level discharge canal which has a time of passage of approximately 28 minutes. The cooling water encounters a constriction at the discharge canal mouth, which boosts its

~- velocity to 1.8 m.sec-1, causing turbulent mixing of the cooling water with the river water. On ebbing tid*es the plume hugs the shore downstream from the discharge and elongates, while on flooding tides it is oriented upstream and remains more compact.

4 EBB I

I FLOOD I Km X-SAMPLING STATIONS Figure 2. Surry Power Station cooling water canal system showing in-plant sampling stations.

5

.e Methods Station L6catio~s Table 1 and Figure 3 show the locations of the phytoplankton and zooplankton sampling stations used in the river study. The intake canal was sampled at its upstream and downstream ends, while the discharge canal was sampled near the highway bridge about 0.8 km upstream from the canal mouth (Fig. 2). The benthos and fouling plate stations are shown in Table 2 and Figure 4.

Sampling and Sample Analysis Methods Phytoplankton samples were accompanied by samples for determinations of chlorophyll a concentration, salinity, and dissolved oxygen concentration. Water temperature and Secchi Disk transparency were measured at each station. A non-metallic 2-liter Van Dorn bottle was used for sampling of phytopiankton and related parameters. Phytoplankton samples were preserved with Lugol's iodine solution, and cell counts and identifications were performed using the inverted micro-scope method. Chlorophyll a samples were preserved with mercuric chloride (40 mg/1), and stored in opaque bottles on ice until return to the laboratory. They were then filtered through glass fiber filters, which were subsequently ground in 90% acetone to extract the chlorophyll a. The chlorophyll concentration in the extract was determined using a Turner Fluorometer, model 111.

6 Table 1 Plankton Sampling Station Locations Station Depth (m) Location DWS 2 Adjacent to tower (QK Fl Lt "A")

Intake 1 Outside intake forebay - zooplankton sampling C 8 Inside intake forebay - phytoplankton sampling HPS 5 Adjacent to tower (QK Fl Lt II ell)

HPW3 2.5 Adjacent to tower (QK Fl Lt IIDII)

HPW2 3 Adjacent to tower (QK Fl Lt IIEII)

HPWl 1 Off west shore of Hog Point, midway between HPS and discharge Discharge 2.5 Discharge canal mouth CBE 1 Off west shore of Gravel Neck, south of discharge CBC 3 Midway between discharge and range markers near Cobham Wharf 11 JI 8 Adjacent to tower (QK Fl Lt G11 )

Intake Canal Within Surry power plant intake canal (sampled Uptake and Downstream by VEPCO personnel)

Discharge Canal Within Surry power plant discharge canal (sampled by VEPCO personnel)

\

0 HPS HPW3 0 HPW2 0 Diso~e )

0 Q Discharge canal CBE Q Q Int ~ canal dnstrm.()DWS 0 Uintake /

In ake canal upstrm.

0 1 2 3 nautical miles Figure 3. Plankton sampling stations

8 Table 2 Benthos and Fouling Plate Station Locations Station Depth (m) Location 1 1.5 Off tower (QK Fl 38 ft.J near Cobham Wharf 2 2.5 Cobham Bay, off Chestnut Bluffs 3 1 Cobham Bay, between mouths of College Run and Lower Chippokes Creek 4 3 Center of Cobham Bay 5 Tower (QK Fl Lt "E")

6 1 In Thorofare off marker tower R "4" 7 1 Cobham Bay, off Gravel Neck 8 4 Tower (QK Fl Lt "F")

9 1 West of Hog Point e 10 4 Between station 9 and black buoy "45" 11 5 Tower (QK Fl Lt "C")

12 .5 Off mouth of College Creek 13 1 East of Hog Point, on line with black and white buoy "J29",

14 6 Black and white buoy "J35" 15 1 Off power plant intake 16 2 Tower (QK Fl Lt "A")

DWS 2 Tower (QK Fl Lt "A")

CBN 2.5 Tower (QK Fl Lt "D")

CBS 3 Tower (QK Fl Lt "F")

e On 010 so 90 cBsOs 04 02 10 30 0 1 2 3 nautical miles

(

Figure4. Benthos and fouling plate stations.

10 Zooplankton samples were taken with a 12.5 cm diameter e Clarke-Bumpus quantitative sampler, equipped with a No. 20 (76p. pore size) net. Tow duration ranged from one minute to five minutes, depending on the turbidity conditions encountered.

Samples were preserved.with 5% buffered formalin, and counts and identifications were made using an Olympus dissecting microscope. Measurements of water temperature, salinity, dissolved oxygen, Secchi Disk transparency, and water depth accompanied each zooplankton tow.

Benthos was sampled with a .05 m2 Ponar grab. The samples were sieved through 1.0 mm and 0.5 mm mesh screens, and the organisms were preserved in a formalin solution containing the stain Phloxine B. Counts and identifications were made under a dissecting microscope.

Fouling organisms were collected on 125 x 75 mm asbestos boards suspended in the river. Two pairs of horizontal and vertical fouling plates were suspended from.a VEPCO instrument tower located at each station, one pair being replaced bi-monthly, the other pair yearly. The attached, organisms were preserved by freezing, and were counted and identified under a dissecting microscope.

Temperature ~easurements were performed using a Hydrolab model RT-125 research thermometer equipped with a model LS A50 thermistor probe. Salinity was measured on a Beckman model RS-7B salinometer. Dissolved oxygen concentrations were determined by the azide modification of the Winkler technique.

11 Sampling Design The sampling dates, stations, and biological parameters sampled are shown in Table 3._ Phytoplankton and zooplankton samples for investigation of entrainment effects were taken in the intake and discharge canals by Surry Power Plant personnel. In all months except May and July these samples were obtained on the same day as the river samples. In May the canal samples were taken one day later than the river*

samples. In July the canal samples were taken nine days late, so additional sets of samples were taken in the river at the plant intake and discharge to provide a complete entrainment series. In January only phytoplankton samples were taken at the upstream end of the intake canal. In all, e eight complete plankton runs, including replicated sampling of surface phytoplankton, chlorophyll a, and zooplankton at ten river stations and of phytoplankton and zooplankton at at least two canal stations, were performed during the study year.

Benthos sampling was performed quarterly during the winter, spring, and fall, and monthly during the sunnner. The winter sampling run was originally scheduled for January, but could not be performed until March 8 due to ice cover at some of the inshore stations. Two samples were taken per station per sampling run.

All of the fouling plates were destroyed by river ice

Table 3 Summary of Biological Sampling Effort; sampling dates, stations sampled, and types of samples taken (Ph= phytoplankton, C =chlorophyll~. Z = zooplankton, B = benthos, F = fouling organisms)

Date (1977)

Plankton Stations 2 - 23 4 - 13 5 - 12 6 - 13 7 - 12 7 - 21 8 - 16 9 - 6 11 - 9 DWS Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Intake Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,Z Ph,C,Z Ph,C,Z Ph,C,Z HPS Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z HPW3 Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z HPW2 Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z HPWl Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Discharge Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,Z Ph,C,Z Ph,C,Z Ph,C,Z CBE Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z CBC Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z JI Ph,C,Z Ph~C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Ph,C,Z Intake Canal Upstrm. Ph Ph,Z Ph,Z Ph,Z Ph,Z Ph,Z Ph,Z Ph,Z .....

• ' N Intake Canal Dnstrm. Ph,Z Ph,Z Ph,Z Ph,Z Ph,Z Ph,Z Ph,Z Ph,Z Discharge canal Ph,Z Ph,Z Ph,Z Ph,Z Ph,Z Ph,Z Ph,Z Ph,Z I

e Table 3 (continued)

Date (1977)

Benthos Stations 3 - 8 4 - 25 6 - 20 7 - 14 8 - 18 10 - 20 1 B B B B B B 2 B B B B B B 3 B B B B B B 4 B B B B B B 5 B B B B B B 6 B B B B B B 7 B B B B B B 8 B B B B B B 9 B B B B B B 10 B B B B B B 11 B B B B B B 12 B B B B B B 13 B B B B B B 14 B B B B B B 15 B B B B B B I-'

w 16 B B B B B B Date (1977)

Fouling Plate Stations 4 - 25 6 - 20 8 - 16 10 - 31 12 - 30 DWS F F F F CBN F F F F F CBS F F F F

14 in January. New sets of plates were installed at the three stations on March 8, and the spring bimonthly plates 1were taken from these sets on April 25. Complete sets of samples were recovered from each station on,June 20, and included I

horizontal and vertical bimonthly plates, incubated since April 25, and horizontal and vertical "annual11 plates, incubated since March 8. In August the plates at stations DWS and CBS were found to have separated from the instrument towers, and they could not be located by dragging the river bottom with a grappling hook or by diving in the vicinities of the towers.

New sets of plates were installed at these stations on September 12.

Data Presentation and Analysis The raw data for each section of the study are presented e in an appendix. Most of the plankton data have been subjected to an analysis of variance, followed by Student-Newman-Keuls' test (Steel and Torrie, 1960) to identify significant differences among sampling stations. Log or square root transformations were performed when necessary to normalize the data prior to analysis. Within the body of the report, data summaries are presented, which include parameter means and which depict differences that are significant at at least the .05 level.

The benthos data present~d in this report include only the organisms recovered on the 1.0 mm mesh screen, which is the sieving device that was used in all preceding years of the study. The data for the 0.5 mm sieve organisms will be

15 included in a subsequent report .

. Results - Plankton Studies Data Presentation The hydrographic data for the plankton sampling runs are presented in Appendix Table Al. The raw biological data are in appendix B, Table Bl (chlorophyll a), Table B2 (total phytoplankton cell counts), Tables B3-Bll (phytoplankton species cell counts), and Tables Bl2-B20 (zooplankton counts).

The river tidal and water temperature conditions on the plankton sampling dates are summarized in Table 4, while the phytoplankton and zoopla~kton analysis of variance results are presented in Tables 5-22.

Phytoplankton Distribution Patterns On the phytoplankton ANOVA summary tables (Tables 5-13).

station-means for chlorophyll a, total cell counts, and indi-vidual species cell counts are listed in ascending order.

Means not sharing an underline are significantly different at the .05 level according to Student-Newman-Keuls' test.

Examination of the phytoplankton ANOVA results reveals eig~t distinct spatial distribution patterns. The first of, these is an apparent uniform distribution throughout the study area, with no evident power plant effect (for example, 8~

Chroomonas sp. in February).

Distribution patterns involving the study area as a whole include a general increase in abundance from the e

16 e Table 4 Environmental Conditions During Plankton Sampling Runs, 19-77 Date Tide Discharge Temp. Discharge No. of Stations minus Surface Power Piant Affected Intake Temp. Temp. Units by

, (_OC) c_oc) Operating Plume Feb. 23 Flood 7.8 13.20 1 CBE,HPWl,HPS Apr. 13 HWS - Ebb 5.1 22.10 1 CBE,HPWl May 12 Ebb 5.2 23.10 1 CBE,HPWl,HPS June 13 HWS - Ebb 7.9 30.80 2 CBE,HPWl July 12 Ebb 5.2 33.80 1 CBE,HPWl July 21 LWS - Flood 4.9 34.90 1 Aug. 16 Flood 7.9 37.30 2 CBE,HPWl

- Sept. 6 Nov. 9 Ebb Ebb 5.4 7.5 36.20 26.90

• 1 2

CBE,HPWl,HPS CBE,HPWl,HPS

17

~. upstream to the downstream stations (chlorophyll a, .total cells, Chaetoceros sp., Skeletonema costatum, and Asterionella japonica in February), and the opposite pattern, a decrease with progression from upstream to downstream (Nitzschia vermicularis, Amphiprora sp., Aste.rionella formosa in February; total cells, Melosir*a:-*subsalsa, Nitzschia Kutzingiana in May; 8u Chroomonas sp., 16µ Chroomo.nas sp., Katodinium rotunda tum in June; I . .

Skeletonema co.stati.un in July; 8µ Chrooinonas sp., 16µ Chroomonas sp., 3µ flagellate in September; Skeletonema costatum in November). The months in which the upstream-downstream zonation of phytoplankton abundance was observed were those in which upstream-downstream salinity ranges of at least 5 ppt were,present (Table Al). In April, when the.entire study area was occupied by essentially.fresh water and in August, when the salinity range was approximately 3* ppt, there were signi-ficant differences in phytoplankton populations among the river stations but there were no distinct upstream-downstream trends.

A number of the spatial distributions indicated essentially uniform abundance throughout the study area, with the exception of one or two stations where population levels were significantly higher than at most of the remaining stations. The exceptional stations included HPW3 (chlorophyll~' total cells, Melosira subsalsa, Melosira ambigua. in April; Katodinium rotundatum, Pyramimona*s sp. in June), CBE (Sp Chroomonas sp., Cryptomonas sp. in April; 8 µ Chroomonas sp., Ankistrodesmus sp.,

18 Rhizosolenia minima in June}, DWS (8µ Chroomonas sp. in April, Leptocyi'ind.rus minimus in July), HPW2 (16µ Chroomonas sp.,

i Katodinium rotundatum in July), and CBC (8µ chroomonas sp.,

Rhizoso1enia minima in September). Of these stations, HPW3, CBE, and DWS are near creek mouths, where relatively high productivity and population levels have been observed in previo4s study years (Jordan et al. 1976, 1977). The fact that the exceptionally high populatio~s were found at these stations for sampling runs that were performed during ebbing tides (Table 4) supports the.hypothesis that the creek drainage contributed organisms or nutrients to the plankton populations at these stations.

The remaining four distribution patterns relate to the

~ Surry Power Station .and its influence on the phytoplankton connnunity in the vicinity of Hog Point.

I The first of these patterns involves the loss of phytoplankton from the river water passed through the power plant cooling water canals and condensers. This was observed in June (Katodinium rotundatum, total cells, chlorophyll a), July (16µ Chroomonas sp.), August (Sp Chroomonas sp., 16µ Chroomonas sp.,

Katodinium rotundatum), and September (8µ Chroomonas sp.,

Katodinium rotund.atum). The species affected were flagellates, removal was detected only for sampling runs conducted when discharge water temperatures exceeded 30°C (Table 4), and reduced population levels of the affected species were not

19 observed in the river beyond the immediate vicinity of the discharge canal mouth.

The power plant occasionally contributed phytoplankton to the upstream side of Hog Point (Skeletonema costatum, Asterionella japonlca in February; N.itzschia vermicularis in April; Gyrosigma beaufortianum in August and September; Amphiprora. sp. in November). Nitzschia vermicutaris and Gyrosigma bea.ufortianum are large pennate diatoms that were probably swept up from the river bottom in the shallow area adjacent to the power plant intake and transported in suspension through the intake and discharge canals.

In several cases the transport process resulted in.

reduced population levels of *certain species on the upstream

-- side of Hog Point, when the cooling water taken in was poorer in phytoplankton than was the upstream receiving water. This pattern was observed for Amphiprora sp. and Asterionella formosa in February; Melosira ambigua and Synedra ulna in April; and total cells, Melosira subsalsa, and Nitzschia kutzingiana in May.

Finally, there was one species, Nitzschia longissima, that was exceptionally abundant in the power plant canals during three of the sampling runs (July 21, August, and September).

Zoopl'ankton* Distribution Patterns The zooplankton ANOVA results (Tables 14-22) are presented

20 according*to the same format as were the phytoplankton results, with population density means in ascending order and underlines joining means that are not significantly different (.05 level).

Five patterns, in addition to uniform distribution throughout the study area, are apparent.

A general decrease in abundance from upstream to down-stream was observed for copepod nauplii, Eurytemora sp.,

and cyclopoid copepods in February; rotifers in May and June; and Eurytemora sp. in November. Stations with exceptionally high population densities of one or more zooplankton organisms

• included HPW3 (polychaete larvae and pelecypod larvae in May),

HPS (barnacle nauplii in June), CBE (polychaete larvae and pelecypod larvae in July), and CBC (Eurytemora sp. and Acartia sp.

I in July). On one sampling date (September 6) the stations on the upstream-side of Hog Point exhibited denser populations of pelecypod larvae than did the stations further upstream or downstream.

The power plant effects that appeared in the zooplankton spatial distributions included release of meroplankton into the river water passing through the cooling water canals (barnacle nauplii in April and September) and transport of organisms from the downstream side to the upstream side of Hog Point (polychaete larvae in April; barnacle nauplii in May, August, and November; and polychaete larvae in August).

Table 5 James River Phytoplankton ANOVA Summary 2-23-77 Parameters Stations and Means (Stations not sharing an underline are significantly different., a ~. 05)

Chl ~ (µg*l-l) CBE JI CBC HPW3 HPW2 HPWl DWS Dis. Int. HPS 3.2 5.2 5.2 5.6 5.6 6.0 6.4 7.6 9.6 10.2 Total cells (cells*ml -l) JI CBC HPW2 HPW3 CBE HPWl HPS DWS Dis. ICD DC Int. ICU 1050 2250 2400 2625 2700 2950 3525 4400 4800 5750 5850 5850 7050 8 µ Chroomonas sp. (cells*ml-1) Int. ICD CBE HPW3 HPWl ICU CBC DWS HPW2 Dis. DC JI HPS 13 13 20 26 26 26 26 26 32 32 39 46 65 16µ Chroomonas sp. (cells *ml -l) DWS CBC CBE HPS HPW3 HPWl HPW2 ICD Dis. JI Int. ICU DC 0 0 6 13 13 13 20 20 20 20 32 39 64 N I-'

-1 Cryptomonas sp. (cells*ml ) JI HPW3 HPW2 HPS DWS HPWl ICD DC Dis. CBC ICU CBE Int.

6 13 20 39 39 64 64 64 64 71 90 97 122

-1 JI CBC HPW2 CBE HPW3 HPS HPWl . Dis. DC DWS ICD Int. ICU Chaetocere;;,$ sp. (cells *ml )

607 1590 1939 2055 2152 2268 2333 2462 2592 2818 3134 3218 3761 Skeletonema costatum (cells-ml -1 ) JI CBE CBC HPW3 HPW2 HPWl HPS DWS Dis. Int. ICD DC ICU 52 122 169 191 192 377 756 1288 2016 2256 2378 2843 2844 Nitzschia vermicularis DC ICD ICU Int. Dis. CBE HPWl DWS JI HPW2 HPS CBC lIPW3 2 2 2 3 4 9 15 18 36 40 42 42 43 (cells*ml- 1 )

Table 5 (continued)

Amphiprora sp. (cells*ml- 1 ) DWS ICU ICD RPWl DC Dis. CBE Int. RPS RPW3 CBC JI RPW2 1 1 1 2 2 2 2 2 7 9 9 10 11 Asterionella japonica RPW3 RPW2 CBE CBC JI RPWl DWS RPS Dis. ICD Int. ICU DC (cells*ml -l) 0 0 0 0 0 6 6 10 24 42 44 46 51 Asterionella formosa DWS Int. ICU ICD DC Dis. RPW2 RPS RPWl CBC JI CBE RPW3 (cells*ml-1) 0 0 0 0 0 0 2 4 4 4 4 6 7 N

N

Table 6 James River Phytoplankton ANOVA Summary 4-13-77 Parameters Stations and Means (Stations not sharing an underline are significantly different, ,a (. 05)

Chl a (µg 1-l) HPWl CBC . CBE Int. Dis. HPS JI HPW2 DWS HPW3 4.0 4.1 4.4 6.4 6.6 6.8 7.8 8.4 9.5 12.2 Total cells (cells*ml-1) HPWl HPS Dis. Int. DC ICU ICD HPW2 CBC CBE JI DWS HPW3 1875 1925 2025 2100 2400 2725 2750 2950 3850 4075 5150 7750 8075 HPS Dis. Int. JI HPW2 8µ Chroomonas sp. (cells *ml -l) 271 310 349 349 375 DC 401 HPWl 542 ICD 543 IfU 34 H[ft CJW2 Dft15 9Pi4 Cryptomonas sp. (cells *ml -l) ICD DC RPS HPWl Int. ICU CBC Dis. JI HJ;lW3 H?.W2 DWS CBE 39 39 52 52 64 78 78 90 116 142 168 246 297 N l,.J

. -1 HPWl CBC JI Melostra*$ubsalsa (cells.ml ) CBE Int. Dis. DC HPS HPW2 ICD ICU DWS HPW3 287 298 445 474 562 573 644 691 873 1939. 2999 4537 5480 Melosira ambigua (cells*ml -1 ) CBE HPWl Dis. ICD Int. DC RPS ICU CBC DWS HPW2 JI HPW3 8 9 15 22 26 26 42 58 117 124 224 280 295 Cyclotella meneghiniana DC Dis. HPW2 CBE HPWl ICD Int. HPS HPW3 ICU CBC JI DWS 0 39 52 64 64 90 129 142 142 155 181 220 310 (cells*ml-1)

Nitzschia kotzingiana (cells*ml -1 ) CBE HPW2 CBC HPS ICU ICD JI HPWl Int. DC DWS Dis. HPW3 78 194 207 233 246 246 258 284 284 310 349 426 478 Nitzschia vermicularis HPW3 CBE JI CBC HPW2 HPS DWS HPWl ICU Int. DC ICD Dis.

(cells *ml -l) 0 Q l 2 2 4 6 8 12 14 15 16 17

e Table 6 (continued)

Synedra ulna (cells*ml- 1 ) Int. Dis. ICD ICU DC HPWl CBE HPS .DWS CBC JI HPW3 HPW2 0 0 1 2 2 2 3 4 12 14 18 22 24

e e /

Table 7 James River Phytoplankton ANOVA Summary 5-12-77 Parameters Stations and Means (Stations not *sharing an underline are significantly different, a. :!;i'.05)

Chl a (µg* 1-1) HPWl CBC Dis. CBE HPS Int. DWS JI HPW3 HPW2 3.6 4.8 5.4 6.0 6.3 6.7 7.2 9.0 10.8 11.8 Total cells (cells*m1-l) Dis. ICU ICD Int. DWS DC HPWl HPS CBC HPW3 HPW2 CBE JI 850 1300 1350 1700 1725 1725 2000 3675, 3675 4075 4150 4875 5925 8 µ Chroomonas sp. (cells*ml -l) HPWl HPW3 JI Dis. CBC CBE ICU DWS HPS ICD HPW2 Int. DC 13 26 26 39 78 90 90 116 116 130 232 272 284 Melosira subsalsa (cells*ml-1 ) ICD Int. Dis. DC DWS ICU HPWl HPW2 CBC. HPS HPW3 CBE JI N

52 78 78 181 182 414 569 698 802 1047 1460 1952 4098 \J1 Skeletonema costatum CBE CBC JI HPWl ICU DC Dis. ICD Int. RPS DWS HPW3 HPW2 0 Q 26 26 52 52 65 104 155 168 310 452 698 (cells*ml-1 )

Cyclotella meneghiniana ICD CBC ICU DC Dis. JI DWS HPW3 HPW2 CBE HFWl Int. HPS (cells*ml- 1) 13 64 90 129 181 181 329 336 349 426 466 466 504 Nitzschia kutzingiana Dis. Int. ICU DC ICD DWS HPWl HPW2 HPS JI HPW3 CBE CBC (cells*ml-1 ) 142 233 272 323 336 362 582 750 1280 1318 1500 1771 2004

e Table 8 James River Phytoplankton ANOVA Summary 6-13-77 Parameters Stations and Means (Stations not sharing an underline are significantly different,.~~ .05)

-1 HPWl HPS DWS Dis. CBE CBC JI RPW3 HPW2 Int.

Chl a (µg* l )

2.9 3.1 3.2 3.6 4.1 4.4 4.8 5.0 5.2 5.8 Total cells (cells *ml -l) Dis. HPS HPWl Int. DC ICD CBC ICU Jl RfW2 HPW3 DWS CBE 650 850 1025 1175 1200 1300 1375 1675 1850 2050 2125 2250 3275 8µ Chroomonas sp. (cells *ml -l) DWS HPWl HPS Dis. Int. DC ICU CBC HPW3 ICD HPW2 . JI CBE 194 194 265 336 362 375 466 478 510 517 834 834 1448

.16 µ* Chroomonas sp. (cells *ml -l) DWS ICD DC HPWl Int. HPW3 Dis. JI HPS CBC CBE ICU HPW2 N 39 52 52* 78 103 116 116 116 129 148 180 207 297 °'

Katodinium rotundatum DWS HPWl DC Dis. ICU HPS Int. CBC ICD SI: HPW2 CBE HPW3 (cells *ml- 1 ) 0 0 Q 0 26 32 39 52 65 97 142 162 233 Melosira subsalsa (cells,ml -1 ) ICD DC Dis. HPW2 ICU JI CBC HPW3 Int. RPS HPWl CBE DWS 0 Q Q 39 52 90 110 129 129 142 187 232 264 Rhizosolenia minima (cells*ml-1) ICU DC Dis. HPS Int. ICD JI CBC DWS HPW2 RPW3 CBE RPWl 0 Q 13 13 26 26 32 39 58 58 72 148 155 Nitzschia kl.ltzingiana DWS DC HPW2 CBC HPWl Dis. ICD ICU HPW3 HPS Int. CBE JI 13 26 39 39 46 52 64 65 71 84 129 162 181 (cells *ml -1)

Pyramimonas sp. (cells,ml- 1 ) RPS ICD DC Int. Dis. HPWl CBE ICU JI CBC HPW2 DWS HPW3 39 52 52 64 78 90 110 155 162 181 214 226 407

Table 8 (co,ntinued)

Ankistrodesmus.sp. (cells*ml -1) Dis. Int. ICU DC HPS ICD HPWl *HPW2 DWS CBC HPW3 JI CBE 0 13 13 13 26 26 32 52 96 llO 162 188 252 3µ Flagellate (cells*ml -1 ) HPS JI Dis. HPWl HPW2 CBC Int. HPW3 DWS CBE ICD ICU DC 13 20 26 58 78 90 103 llO 122 188 388 440 . 492 N

Table 9 James River Phytoplankton ANOVA Summary 7-12-77 Parameters Stations and Means (Stations not sharing an underline are significantly different,a <.05)

CBC DWS HPS Dis. JI HPW2 HPWl Int. CBE HPW3 4.5 5.6 6.0 6.2 7.2 7.6 8.2 8.-5 8.7 9.2 Total cells (cells.ml-1 ) Dis. CBC HPS HPWl Int. HPW3 DWS CBE HPW2 Jl 925 1025 1150 1325 1475 2025 2450 2750 3500 3850 8µ Chroomonas sp. (cells*ml-1 ) CBC Dis. Int. HPS HPWl DWS HPW3 CBE HPW2 JI 362 374 466 543 569 795 828 1190 1280 1854 16µ Chroomonas sp. (cells*ml- 1 ) CBC Dis. HPS HPWl Int. CBE DWS JI HPW3 HPW2 N CXl 32 78 103 214 220 232 239 304 362 660 Katodinium rotundatum (cells*ml-1 ) CBC DWS HPS Dis. CBE Int. HPWl HPW3 JI HPW2 13 52 52 78 84 90 116 465 620 808 Leptocylindrus minimus (cells*ml- 1 ) HPWl JI CBC HPW3 RPS Dis. HPW2 CBE Int. DWS 0 24 26 39 71 90 155 162 207 750 Chaetoceros sp. (cells*ml-1) HPWl JI HPW3 HPW2 Dis. Int. CBE CBC HPS DWS 32 46 60 84 90 90 96 155 194 258 Skeletonema costatum (cells *ml -1 ) DWS Int. Dis. HPW2 RPS HPW3 HPWl CBC CBE JI 6 12 15 24 61 102 118 135 143 271

e Table 10 James River Phytoplankton ANOVA Summary 7-21-77 Parameters Stations and Means (Stations not sharing an underline are significantly different, a.<. 05)

Total cells (cells*ml -1 ) Dis. ICU ICD Int. DC 1150 1400 1600 1600 1650 8µ Chroomonas sp. (cells*ml -l) ICD DC Dis. ICU Int.

246 271 284 310 440 Katodinium rotundatum (cells*ml -l) ICD DC Dis. ICU Int.

78 116 130 168 232 Chaetoceros sp. (cells*ml -l) Dis. DC Int. ICU ICD 52 142 298 323 375 N

\0 Skeletonema costatum (cells*ml -l) Int. DC ICD Dis. ICU 87 .87 89 92 139 Nitzschia longissima (cells*ml -l) ICU Int. Dis. ICD DC 207 220 220 530 530 Gyro sigma sp. (cells*ml -l) Dis. Int. ICD DC ICU 6 11 11 12 13

Table 11 James River Phytoplankton ANOVA Summary 8-16-77 Parameters Stations and Means (Stations not sharing an underline are significantly different, a ~.05)

Chl ~ (µg* l -1 ) DWS CBE JI CBC RPS Dis. RPW1 RPW3 Int. RPW2 4.3 7.6 7.9 9.5 9.6 10.0 10.2 10.4 10.8 11. 5 Total cells (cells*ml-1 ) Dis. DC RPS CBC DWS CBE HPW2 RPWl ICD Int. ICU JI RPW3 1300 1350 1550 1750 1750 1850 2100 2300 2450 2450 2500 2750 2800 8 µ Chroomonas sp. (cells. ml -l) Dis. DC RPS CBE CBC RPWl ICD ICU Int. RPW2 DWS JI RPW3 26 233 426 568 569 736 750 776 866 866 930 1266 1512 I

16µ Chroomonas sp. (cells*ml -l) Dis. DC ICD ICU DWS CBC RPS RPW3 RPW2 Int. RPWl CBE JI 0 Q 26 26 90 65 65 90 90 103 104 142 258 w 0

Katodinium rotundatum Dis. DC RPS CBC Int. DWS ICD ICU RPW3 CBE HPW2 JI HPWl (cells'ml -1) 0 0 78 104 142 149 155 194 258 271 272 466 542 Skeletonema costatum DWS HPW2 HPS RPWl CBE RPW3 ICD Dis. Int. CBC ICU DC JI (cells.ml -l) 12 38 48 48 55 57 64 71 78 92 92 100 121 Cyclotella meneghiniana ICD Int. DWS JI ICU RPWl RPW3 RPW2 CBC . RPS CBE DC Dis.

(cells*ml-1) 13 26 32 52 52 52 52 64 65 78 90 130 142 Chaetoceros sp. (cells,ml -l) RPWl Dis. RPS Int. RPW3 DWS ICU ICD DC CBC CBE RPW2 JI 12 12 14 16 17 19 20 24 26 27 28 30 51 Leptocylindrus minimus RPS RPW2 CBE DC ICU DWS CBC HPWl JI Int. Dis. ICD HPW3 (cells*ml -1) 0 0 o_ 26 26 52 52 64 78 90 90 104 168

Table 11 (continued)

Rhizosolenia minima (cells *ml -l) RPW3 RPW2 ICD DC ICU Int. Dis. DWS RPS RPWl CBC JI CBE 26 26 39 52 64 65 104 104 116 142 142 142 232 Gyrosigma beaufortianum DWS JI CBE RPW2 RPW3 HPS RPWl DC ICD CBC ICU Dis. Int.

62 80 116 213 222 224 225 240 256 266 302 347 465 (cells*ml -l) --

Nitzschia longissima DWS RPW2 HPS HPW3 JI Int. CBE CBC RPWl Dis. ICD ICU DC (cells*ml -1) 6 13 17 18 19 24 26 30 36 57 64 65 Ztf.

Pyramimonas sp. (cells* ml -l) RPWl ICD DC CBC DWS Int. Dis. CBE RPS HPW2 JI HPW3 ICU 39 52 65 78 97 104 104 104 116 129 142 181 246 3µ Flagellate (cells.ml-I) RPW2 RPWl ICU DC .CBC JI Dis. HPW3 RPS Int. CBE DWS ICD 13 39 39 39 39 52 52 52 52 52 65 136 634 l.,J

Table 12 James River Phytoplankton ANOVA Summary 9-6-77 Parameters Stations and Means (Stations not sharing an underline are significantly different, a ~.05)

-1 Total cells (cells*ml ) Dis. DWS DC RPS CBE RPWl ICD Int. ICU JI HPW3 RPW2 CBC 1850 2100 2350 2600 2700 2900 3050 3050 3400 3450 3750 3900 4150

-1 8 µ Chroomonas sp. (cells*ml ) Dis. DC DWS CBE RPWl HPS ICU ICD Int. JI HPW3 HPW2 CBC 233 426 491 543 620 646 685 698 776 1202 1241 1279 1629

-1 RPS HPW3 RPWl ICU CBE JI HPW2 CBC 16µ Chroomonas sp. (cells*ml ) DWS Dis. DC Int. ICD 0- 13 39 52 65 78 78 78 90 194 232 246 258 Cryptomonas sp. (cells*ml -1 ) ICU ICD DC JI Int. Dis. RPS HPW2 DWS HPWl CBC HPW3 CBE 0 0 Q 13 52 52 64 90 103 155 155 168 284 w N

Katodinium rotundatum DC Dis. ICD DWS RPWl RPS CBE ICU Int. RPW3 JI HPW2 CBC (cells*ml -1 ) a 13 78 136 155 194 258 258 259 414 440 582 633 Leptocylindrus minimus CBE DC JI Int. CBC RPW3 ICD RPW2 Dis. ICU RPWl DWS HPS (cells*ml -l) 90 90 129 168 181 194 220 220 258 272 284 362 388

-1 Rhizosolenia minima (cells *ml ) ICD DC Dis. ICU Int. DWS CBE JI RPS RPW3 HPWl HPW2 CBC 13 26 39 52 , 52 181 207 310 323 323 374 374 556 Cyclotella meneghiniana RPW3 CBE CBC HPW2 RPWl DC - DWS RPS ICU JI Dis. Int. ICD (cells*ml-1) 13 26 39 77 90 104 110 116 130 181 181 207 284 Skeletonema costatum Dis. RPS CBE CBC RPW3 DC DWS RPWl ICD Int. HPW2 ICU JI (cells*ml -l) 0 15 20 20 22 24 42 44 48 50 50 53 128

e Table 12 (continued)

Nitzschia longissima CBC JI DWS RPW2 RPWl CBE Int. RPW3 RPS Dis. ICU ICD DC 13 26 130 142 168 181 220 220 246 349 400 491 646 (cells*mC 1 )

Gyrosigma beaufortianum CBE JI CBC RPWl DWS RPW2 RPS Dis. RPW3 DC ICD Int. ICU (cells*ml -l) 4 16 74 102 106 297 384 403 405 670 863 890 1066 Gyro sigma sp. (cells*ml-1) DWS CBE CBC Dis. JI RPWl ICU Int. ICD DC RPW2 RPS RPW3 0 0 2 3 4 5 5 6 6 7 8 18 48

-1 Pyramimonas sp. (cells*ml ) ICD Int. RPS ICU DC Dis. RPW2 HPW3 CBC DWS JI HPWl CBE 39 90 90 90 90 130 194 349 362 375 478 608 633 3µ Flagellate (cells*ml-1 ) DC ICD CBE RPS Dis. ICU DWS RPWl Int. CBC RPW2 HPW3 JI 0 26 39 39 52 52 52 78 104 142 207 246 298 w w

e Table 13 James River Phytoplankton ANOVA Summary 11-9-77 Parameters Stations and Means (Stations not sharing an underline are significantly different, a. (.05)

-1 Chl a (µg* l y HPWl DWS CBC CBE Dis. HPW2 HPS Int. JI HPW3

1. 6 2.0 2.0 2.2 2.2 2.2 2.4 2.6 2.8 3.0

-1 Total cells (cells"ml ) Dis. HPW2 HPWl ICD DC HPW3 JI DWS HPS CBE ICU CBC Int.

400 400 400 550 550 550 600 700 700 750 750 800 850

-1 Dis. DC CBC ICU CBE HPS Int. DWS 8 µ, Chroomonas sp. (cells"ml ) HPWl HPW2 HPW3 JI ICD 90 174 188 214 214 226 246 252 278 278 284 298 398

-1 16 µ Chroomonas sp. (cells*ml ) Dis. HPW2 HPWl DC ICD JI HPS ICU CBC CBE DWS HPW3 Int.

39 58 58 78 84 84 96 116 136 142 142 155 181 w

.p.

Katodinium rotundatum DWS HPWl Dis

• JI HPW2 HPW3 ICD CBE DC Int. HPS ICU CBC (cells*ml -l) 10 20 26 26 32 64 65 72 ZB 78 90 129 142 Skeletonema costatum Dis. ICD DWS ICU DC HPS HPW2 Int. HPW3 CBE HPWl JI CBC 0 8 8 15 18 32 33 34 35 37 44 93 100 (cells*ml -1 )

Nitzschia longissima DWS CBC HPW3 HPW2 JI DC CBE ICU ICD Dis. HPWl HPS Int.

6 6 20 20 20 26 26 32 39 39 52 58 78 (cells*ml -1 )

-1 3 µ Flagellate (cells.ml ) JI Dis. HPW3 HPW2 HPWl CBC DC Int. DWS HPS ICD CBE ICU 13 13 26 26 39 39 39 52 55 84 90 97 110

-1 Amphiprora sp. (cells-ml ) HPW2 CBE JI CBC HPW3 HPS HPWl DC DWS ICD ICU Dis. Int.

0 0 l l 1 4 4 4 6 7 10 10 15

e Table 14 James River Zooplankton ANOVA Summary 2-23-77 Parameters Stations and Means (Stations not sharing an underline are significantly different, a 1.05)

Copepod nauplii (No. /100 1) IC DC DWS Int. Dis. HPS CBE HPW2 CBC HPWl HPW3 JI 13 21 25 32 50 61 83 116 123 168 404 676:

Barnacle nauplii (No./100 1) HPW$ HPW2 .Dws CBE Int. JI CBC HPS IC DC Dis. HPWl 0 0 1 1 1 1 2 2 3 5 9 13 Polychaete larvae (No./100 1) JI HPW3 IC CBE CBC DC HPW2 HJ;>S DWS HPWl Int. Dis.

4 13 16 27 31 46 49 60 74 77 145 176 w

Eurytemora sp. (No./ 100 1) IC Int. DWS Dis. DC HPS HPW2 HPWl CBC CBE HPW3 JI Vl 1 2 3 6 8 16 51 52 65 84 150 267 Harpacticoid copepods (No./100 1) HPW2 DWS HPW3 JI CBC DC CBE HPWl HPS Int. IC Dis.

1 1 2 2 2 4 4 6 9 10 18 21 Cyclopoid copepods (No./100 1) DWS Int. IC Dis. CBE DC HPS HPW3 HPW2 HPWl CBC JI 3 4 4 5 7 7 .8 8 10 21 23 34 Rotifers (No./100 1) IC DC HPW3 DWS HPS HPW2 Dis. CBE CBC HPWl Int. JI 1 1 13 21 24 29 36 37 37 65 87 105

Table 15 James River Zooplankton ANOVA Summary 4-13-77 Parameters Stations and Means (Stations not sharing an underline are significantly different, a (. 05)

Copepod nauplii (No./100 1) DWS HPW3 CBC JI !CD Dis. HPS CBE DC HPW2 ICU HPWl Int.

139 224 234 259 276 341 342 350 364 404 412 698 1252 Barnacle nauplii (No. /100 1) DWS Int. HPS IIPW3 HPW2 HPWl CBE CBC JI ICU ICD DC Dis.

0 0 0 0 0 0 0 0 0 13 25 58 233 Euritemora sp. (No. /100 1) CBE Dis. !CD DC HPWl ICU HPW3 Int. JI HPS HPW2 DWS CBC 0 6 7 9 15 18 18 20 21 25 30 34 43 l,.)

°'

Harpacticoid copepods (No. /100 1) CBC CBE DWS ICU HPW3 HPWl JI HPW2 DC Int. Dis. ICD HPS 3 4 4 9 10 13 14 15 17 22 26 26 66 Cyclopoid copepods (No. /100 1) DC ICD CBE ICU DWS Dis. CBC JI HPW3 HPS HPWl Int. HPW2 4 6 8 9 14 15 20 25 28 39 60 66 74 Rotifers (No./100 1) CBE DWS HPS HPWl ICU DC HPW2 CBC JI !CD Dis. HPW3 Int.

2 11 14 17 18 28 38* 38 41 45 54 . 56 255 Bosmina sp. (No. /100 1) DC HPWl CBE JI HPW3 ICD ICU Dis. DWS CBC HPS HPW2 Int

• 1 5 . 10 11 14 14 14 15 17 19 29 47 56 Polychaete larvae (No. /100 1) DWS HPS HPW3 CBE CBC JI HPWl Int. ICU !CD DC HPW2* Dis.

0 0 0 0 0 0 1 2 3 4 5 6 8

e Table 16 James River Zooplankton ANOVA Summary 5-12-77 Parameters Stations and Means (Stations not sharing an underline are significantly different, a. ( .05)

Copepod nauplii (No./100 1) DC Dis. ICD CBE HPS ICU HPW2 Int. CBC DWS JI HPWl HPW3 118 182 192 223 407 502 528 565 619 668 802 1161 1602 Barnacle nauplii (No./100 1) JI CBC HPW3 CBE HPW2 HPS IOD DC DWS ICU HPWl Int. Dis.

9 12 23 54 71 277 293 452 554 555 790 811 1125 Polychaete larvae (No./100 1) CBE CBC JI HPS HPW2 ICD DWS DC HPWl Dis. ICU Int. HPW3 2 3 5 9 13 18 19 25 25 28 39 82 186 w

-...J CBE ICD DC ICU HPS CBC HPWl Dis. DWS HPW2 JI Int. HPW3 Pelecypod larvae (No./100 1) 0 0 7 20 35 44 54 58 60 76 87 225 348 Eurytemora sp. -(No./100 1) DC ICD ICU Dis. CBC CBE HPS HPW2 JI DWS HPWl Int. HPW3 11 11 15 44 52 57 136 149 151 154 180 219' 303 Acartia sp. (No./100 1) JI CBE CBC HPWl HPW2 HPS DC HPW3 DWS Dis. ICU Int. ICD 2 2 3 7 19 26 34 37 49 112 240 483 ~

Harpacticoid cooepods (No./100 1) DWS ICU Int. ICD DC HPW3 CBC Dis. HPW2 HPWl HPS CBC JI 9 17 20 21 23 29 41 45 56 70 75 86 166 Rotifers (No./100 1) Dis. DC ICD Int. ICU DWS HPS CBC HPWl HPW2 HPW3 CBE JI 0 0 0 3 4 9 14 20 29 40 42 73 286

Table 17 James River Zooplankton ANOVA Summary 6-13-77 Parameters Stations and Means (Stations not sharing an underline are significantly different, a S. 05)

Cooepod nauplii DC ICU ICD Dis. HPS JI HPW3 CBE Int. DWS HPW2 CBC HPWl 69 211 242 266 462 515 574. 750 .. 966 1001 1060 1316 1325 Barnacle nauolii (No./100 1) JI HPW2 ICD ICU DWS HPW3 CBC DC CBE Int. Dis. HPWl HPS 0 14 32 56 60 69 72 130 143 148 175 186 300 Polychaete larvae (No./100 1) ICU DC. ICD HPS Int. JI HPW3 CBC DWS Dis. HPW2 HPWl CBE 1 3 4 4 4 5 13 16 18 20 24 29 31 w

00 Pelecvpod larvae (No./100 1) DWS ICD ICU Dis. DC Int. HPW2 HPS JI CBE CBC HPWl HPW3 0 0 0 2 4 7 12 20 30 40 40 60 62 Eurvternora sp. (No. /100 1) DC HPW2 HPW3 ICU DWS Int. Dis. HPS ICD JI CBE CBC HPWl 1 4 4 5 5 11 13 16 17 23 25 30 67 Acartia sp. (No. /100 1) CBC HPW2 DC Int. HPS Dis. HPW3 JI ICU

• CBE HPWl ICD DWS 3 9 11 13 16 16 17 22 34 57 58 62 177 Harpacticoid cooepods (No./100 1) HPW2 JI ICD DC DWS CBC Int. HPW3 HPS CBE Dis. ICU HPWl 0 0 2 2 2 3 3 4 4 5 6 9 9 Rotifers (No./100 1) DWS Int. HPS ICD ICU DC Dis. HPW3 HPWl JI CBC CBE HPW2 0 0 0 0 0 0 6 16 18 28 130 141 195

Table 18 James River Zooplankton ANOVA Summary 7-12-77 Parameters Stations and Means (Stations not sharing an underline are significantly different, a ~ .05)

Copepod nauplii (No./100 1) DWS RPW2 Dis. RPS CBE RPWl HPW3 INT CBC JI 177 1116 1340 1806 2135 2227 2788 2838 3589 3639 Barnacle nauplii (No./100 1) DWS RPW2 CBC Int. JI Dis. RPWl HPW3 CBE HPS 7 8 17 24 70 72 94 125 183 238 Polychaete larvae (No./100 1) DWS JI RPW2 Int. CBC Dis. HPS RPWl RPW3 CBE 7 13 30 37 64 68 83 131 140 325 l,J

\0 Pelecypod larvae (No./100 1) DWS HPW2 Dis. Int. JI RPS RPW3 RPWl CBC CBE 7 94 158 170 408 932 1409 1509 2725 9430 Eurytemora sp. (No./100 1) Dis. CBE D.WS HPW2 Int. HPW3 HPS HPWl JI CBC 0 0 1 2 9 9 11 29 63 662 Acartia sp. (No. /100 1) DWS JI , RPW2 Dis. RPS RPWl RPW3 Int. CBE CBC 51 82 151 272 348 421 435 477 614 1214 Rarpacticoid copepods (No./100 1) Dis. JI RPW2 DWS CBC HPW3 CBE HPS Int. RPWl 0 0 2 3 11 29 33 39 51 72

e e Table 19 James River Zooplankton ANOVA Summary 7-21-77 Parameters Stations and Means (Stations not sharing an underline are significantly different, a ( .05)

Copepod nauplii (No./100 1) DC Dis. lnt. ICU !CD 177 655 1262 1332 2304 Barnacle nauplii (No./100 1) DC !CD Int. ICU Dis.

65 85 152 184 235

• Polychaete larvae (No./100 1) DC !CD Int. Dis. ICU 28 44 53 72 120 Pelecypod larvae (No./100 1) DC ICU !CD Dis. Int.

1 5 7 12 178 Eurytemora sp. (No./100 1) Int. !CD DC ICU Dis.

9 18 21 26 37 Acartia sp. (No./100 1) Dis. DC ICU !CD Int.

115 161 321 410 479 Harpacticoid copepods (No./100 1) ICU \ !CD Int. DC Dis.

10 11 18 18 34 Rotifers (No./100 1) DC !CD ICU Dis. Int.

1 1 2 8 26

e e Table 20 James River Zooplankton ANOVA Summary 8-16-77 Parameters Stations and Means (Stations not sharing an underline are significantly different, a <.OS)

Copepod nauplii (No./100 1) DC CBC Dis. HPS DWS HPW3 HPWl HPW2 CBE ICU Int. JI ICD 345 349 541 547 597 726 936 981 1142 1671 1694 1935 2776 Barnacle nauplii (No./100 1) HPS JI CBC HPW2 HPW3 HPWl DWS CBE ICU Dis. DC Int. ICD 33 40 50 50 93 125 129 237 306 360 372 402 574 Polychaete larvae (No./100 1) HPW2 DWS HPW3 HPWl Dis. DC HPS JI CBE Int. CBC ICD ICU 8 8 12 18 22 22 29 30 32 39 47 58 93

~

Pelecypod larvae (No./100 1) HPS DWS DC HPW2 HPWl ICU CBC ICD CBE JI HPW3 Dis. Int.

0 2 4 11 14 17 18 19 23 26 42 52 78 Eurytemora sp. (No. /100 1) DWS CBC ICD HPWl ICU HPW3 DC Dis. HPS JI HPW2 Int. CBE 0 0 4 6 7 8 8 9 10 19 22 24 31 Acartia sp. (No./100 1) DC CBE ICU ICD CBC Dis. HPW3 HPWl DWS HPS Int. JI HPW2 57 70 80 84 114 130 138 166 182 238 253 317 314 Harpacticoid copepods (No./100 1) DWS JI CBE HPWl HPW3 Int. CBC DC HPS Dis. ICD HPW2 ICU 0 0 4 4 4 4 4 5 13 14 14 16 18 Rotifers (No./100 1) DWS Dis. HPWl DC HPS ICD HPW2 CBE Int. HPW3 CBC JI ICU 0 0 2 3 5 6 8 10 12 19 20 26 27

Table 21 James River Zooplankton *ANOVA Summary 9-6-77 Parameters Stations and Means (Stations not sharing an underline are significantly different, a (.05)

Copepod nauplii {No./100 1) Dis. DC DWS Int. CBE JI RPS HPW3 HPWl ICD ICU CBC RPW2 272 375 449 495 561 651 797 1017 1160

• 1177 2978 3972 4249 Barnacle nauolii {No./100 1) DWS Int. RPW3 JI CBC CBE Dis. RPW2 RPS HPWl ICD ICU DC 23 30 44 60 63 76 93 93 106 121 224 267 32~

Polvchaete larvae (No./100 1) HPW3 DWS CBE CBC Int. Dis. HPS JI HPW2 HPWl DC ICTT Icn 2 4 15 16 16 17 20 23 28 44 65 78 92 ..,..

N Pelecvpod larvae (No./100 1) DWS Dis. Int. ICD DC JT ICU RPW3 HPWl RPS CBC RPW2 CBE 6 67 70 214 252 378 497 1374 1703 2660 3628 3690 5228 Acartia sp. {No./100 1) Int. CBE Dis. JI HPS DWS RPWl RPW3 ICU ICD RPW2 CBC DC 77 89 127 128 132 148 224 231 262 334 361 572 606 Rotifers (No./100 1) DWS Dis. DC JI RPS RPWl CBE CBC RPW3 HPW2 Int .. ICD ICU 2 3 11 28 37 58 63 71 72 87 140 354 2430

.e Table 22 James River Zooplankton ANOVA Summary 11-9-77 Parameter Stations and Means (Stations not sharing an underline are significantly different,a S .05)

Copepod nauplii (No./100 1) HPW3 Dis. JI CBE DC HPWl Int. CBC ICD DWS HPW2 ICU , HPS 84 141 172 184 225 273 316 402 536 550 700 715 1717 Barnacle nauplii (No./100 1) HPW2 HPW3 JI CBC HPWl ICU DWS CBE HPS Int. ICD Dis. DC 1 3 3 4 5 11 12 12 18 21 32 42 56 Polychaete larvae (No./100 1) DWS Dis. JI CBC HPW3 HPW2 Int. DC HPS ICD ICU CBE HPWl 10 17 19 23 32 35 37 53 77 96 106 125 200 w~

Acartia sp. (No./100 1) HPW3 DC 1 CBE Dis. CBC HPWl ICD DWS JI ICU Int. HPS HPW2 7 12 18 22 25 31 46 57 66 74 77 179 180 Rotifers (No./100 1) HPW2 HPWl CBE CBC Dis. HPS HPW3 DWS JI DC Int. ICD ICU 0 3 6 12 16 24 28 31 43 57 58 64 66 Eur}':temora sp. (No. /100 1) DWS Int. HPS HPWl Dis. ICU Dc* CBE ICD CBC HPW3 HPW2 JI 0 0 0 0 0 0 0 2 3 3 12 24 43

44 Results - Benthos Studies Data Presentation The hydrographic data associated with the 1971 benthos sampling runs appear in Appendix Table A2. The benthos biological data are in Appendix C, Tables Cl-C6 (species counts) and C7-Cl2 (diversity indices). One mollusk, which has been designated as Brach'idontes recurvus in previous reports, was determined to be Modiolus* demissus instead, so this name appears instead of~- recurvus in Tables Cl-C6.

Benthos Distribution Patterns The 1977 spatial distributions for the major benthic organisms of the study area are presented .in Table 23. Most of these organisms showed an apparent preference for either the sandy or the silty clay substrate. Those that seemed to be most abundant at the sandy stations were Corbicula manilensis (Table 23E), Nereis succinea (Table 23H), Corophium lacustre (Table 23L), and Lepidactylus dytiscus (Table 23M). Organisms that apparently*preferred the silty clay substrate were Rangia cuneata, Congeria leucophaeta, Scolecolepides viridis, Heteromastus filiformis, Gamma.rus sp., Leptocheirus plumulosus,

~nd Cyathura polita (Tables 23A, C, G, I, K, N, and O, respectively).

Macoma mitche'ili (Table 23D), Hydr.obia sp. (Table 23F), oligochaetes (Table 23J), and dipteran larvae (Table 23P) were not distinctly associated with one or the other of the substrate types. Dipteran larvae, however; were found in the 1.0 nnn fractions of samples taken only from stations upstream from Hog Point ..

e

45 Four species exhibited distribution patterns that suggested 4lt possible responses to the power plant plume. Congeria leucophaeta and Heteromastus filiformis yielded the highest numbers of individuals in samples.from plume station 11, .while for Corophium lacustre the largest numbers obtained within the silty clay substrate were from plume stations 8 and 11. Although the m.nnbers of these organisms that were collected were so small that s*tatis-tical testing could not be performed there is at least some suggestion of a positive power plant effect on these species.

This pattern has been observed in previous study years for Congeria leucophaeta (Jordan et al. 1977) ..

The only species showing a possible negative power plant effect was Leptocheirus plumulosus, which seemed to be less abundant at plume stations 8 and 11 than at the other silty clay tt stations. This pattern had been observed previously in 1974 and 1975 (Jordan et al. 1974). Analysis of variance, however, indicated that the apparent differences within the 1977 data were not significant at the .OS level.

Severely cold weather during the winter of 1976 - 77 apparently killed large numbers of Rangia cuneata .. Most of the individuals of this species collected on March 8 (Table Cl) were decomposing, indicating that they had recently died. The total number of R. cuneata collected in the study area on April 25 (Table 23A) was 51, lower than the total collected on any other sampling date since the Surry Power Station study began in 1969 (Figure S).

Recovery was rapid, however, and population levels determined during the succeeding four sampling runs in the 1977 study year

.~ were within the range of the 1975 and 1976 population levels.

,e Rangio cuneala 350 300 N

E 250 -*

~

, 200 -- Cl ct 0

z 150

'- -- -- - - w 0 -

.i,,.

0\

...I

...ct 0 100 - - c--

50 N.S. N.

s.

N.

s.

IJJ

...I 0

1969 1970 1971 1972 1973 1974 1975 1976 1977 Figure 5. Temporal distribution of Rangia cuneata in the study area, May 1969 - Jan. 1978.

N. S. :; Not sampled

Table 23 Seasonal and Spatial Distributions of Major Benthic Animals - 1977 A. Rangia cuneata (No. per 0.1 m2 )

Substrates and Station Numbers Sand Silty Clay Silt Control Plume Control Plume Sand Clay Date 1 3 12 7 9 13 5 10 2 6 14 16 4 8 11 15 E Mar. 8 1 6 1 3 3 1 7 7 5 11 18 7 19 89 Apr. 25 4 7 2 2 7 2 1 4 17 5 51 June 20 1 17 5 2 1 6 13 5 10 4 21 10 17 15 127 July 14 2 8 2 10 2 5 24 14 4 15 2 12 34 3 13 4 154 Aug. 18 2 2 5 5 11 19 9 9 7 11 10 6 17 11 4 128 Oct. 10 7 11 6 3 2 10 5 6 8 1 27 8 2 11 2 109 E 13 20 35 34 18 32 5Lf 42 36 53 13 85 93 51 69 10 658 B. Rangia cuneata (g per 0.1 m2 )

Substrates and Station Numbers Sand Silty Clay Silt Control Plume Control Plume Sand Clay E Date 1 3 12 7 9 13 5 10 2 6 14 16 4 8 11 15 Mar. 8 .41 . 98 .44 1. 46 .42 1. 69 *1.08 .50 1. 60 2.55 1.14 12.52 24.79 Apr. 25 1.42 5.28 1. 32 . 50 4.56 .79 .12 1.15 2.70 .80 18.64 June 20 15.20 2.21 .52 1. 31 .14 .26 4.97 4.10 5.49 4.64 .83 3.46 43.13 July 14 .83 1. 54 .67 .74 .62 .52 .01 2. 77 2.01 2.59 15.13 .62 4.76 32.81 Aug. 18 1.08 2.36 . 92 2.17 .80 .01 1. 00 5.06 4.19 3. 72 1.55 1. 65 3.83 28.34 Oct. 10 3.72 *-

8.33 3.95 .01

• 74 2.78 2.89 6.73 3.63 .88 3.48 1.42 38.56 E 6.04 6.30 23.53 13.47 3.43 5.51 1. 60 2.01 21.83 15.06 .62 21.28 30.20 5.92 28.05 1. 42 186. 27

Table 23 (continued)

Seasonal and Spatial Distributions of Major Benthic Animals - 1977 2

C. Congeria leucophaeta (No. per 0.1 m)

Substrates and Station Numbers Sand Silty Clay Silt Control Plume Control Plume Sand Clay Date 1 3 12 7 9 13 5 10 2 6 14 16 4 8 11 15 Mar. 8 1 1 2 Apr. 25 1 1 1 3 June 20 1 30 31 July 14 1 1 Aug. 18 2 2 Oct. 10 0 E 0 0 0 0 0 0 2 1 0 0 1 0 0 3 32 0 39 D. Macoma mitchelli (No. per 0.1 m2)

Substrates and Station Numbers Sand Silty Clay Silt Control Plume Control Plume Sand Clay Date 1 3 12 7 9 13 5 10 2 6 14 16 4 8 11 15 Mar. 8 0 Apr. 25 6 6 June 20 1 1 July 14 3 4 1 4 1 1 14 Aug. 18 l 2 1 1 5 Oct. 10 11 2 3 2 3 4 4 7 10 4 4 2 1 57 E 11 2 3 2 0 3 8 10 7 10 2 5 9 1 3 7 83

Table 23 (continued)

Seasonal and Spatial Distributions of Major Benthic Animals - 1977 2

E, Corbicula manilensis (No. per 0.1 m )

Substrates and Station Numbers Sand Silty Clay Silt Control Plume Control Plume Sand Clay Date 1 3 12 7 9 13 5 10 2 6 14 16 4 8 11 15 Mar. 8 4 1 1 1 7 Apr. 25 1 1 2 June 20 1 2 1 4 July 14 2 2 Aug. 18 1 1 Oct. 10 0 E. 0 2 6 2 3 0 1 0 0 1 0 0 0 0 1 0 16 F. Hydrobia sp. (No. per 0.1 m2)

Substrates and Station Numbers Sand Silty Clay silt Control Plume Control Plume sand Clay Date 3 12 7 9 13 5 10 2 6 14 16 4 8 11 15 Mar. 8 3 1 1 1 23 21 5 55 Apr. 25 1 1 9' 3 1 1 16 June 20 8 2 2 1 4 17 July 14 1 4 3 8 Aug. 18 2 1 3 2 3 1 12 Oct. 10 2 1 1 1 1 1 7

.E 12 2 4 2 2 3 2 0 4 26 33 11 9 1 3 1 115

Table 23 (continued)

Seasonal and Spatial Distributions of Major Benthic Animals - 1977 G. Scolecolepides viridis (No. per 0,1 m2 )

Substrates and Station Numbers Sand Silty Clay silt Control Plume Control Plume Sand Clay Date 1 3 12 7 9 13 5 10 2 6 14 16 4 8 11 15 Mar. 8 1 2 2 1 1 2 l 5 15 Apr. 25 2 1 5 l J 5 15 June 20 6 2 1 9 2 4 24 July 14 3 5 1 5 l 2 6 7 30 Aug. 18 4 4 4 6 l 3 2 2 l 27 Oct. 10 4 6 6 1 2 l 4 24 E 4 3 4 0 2 13 24 14 2 5 9 2 17 10 21 5 135 Ul 0

H. Nereis succinea (No. per 0.1 m2)

Substrates and.Station Numbers Sand Silty Clay Silt Control Plume Control Plume sand Clay Date 1 3 12 7 9 13 5 10 2 6 14 16 4 8 11 15 Mar. 8 1 1 3 2 2 9 Apr. 25 1 1 1 1 1 l 2 8 June 20 1 1 2 1 2 2 9 July 14 1 2 2 1 6 Aug. 18 7 1 1 1 1 3 1 1 1 17 Oct. 10 14 2 9 5 9 2 3 4 1 1 2 8 60 E 23 4 11 3 .8 13 0 2 0 5 11 4 0 5 8 12 109

e

/

Table 23 (continued)

Seasonal and Spatial Distributions of Major Benthic Animals - 1977 I. Heteromastus filiformis (No. per 0.1 m2)

Substrates and Station Numbers Sand Silty Clay Silt Control Plume Control Plume Sand Clay Date 1 3 12 7 9 13 5 10 2 6 14 16 4 8 11 15 Mar. 8 0 Apr. 25 1 1 June 20 2 2 July 14 1 1 15 1 18 Aug. 18 1 1 2 2 4 10 Oct. 10 1 1 4 7 13 E. 1 0 1 1 0 3 7 1 0 0 0 0 0 0 28 2 44 J. Oligochaetes (No. per 0.1 m2 )

Substrates and Station Numbers Sand Silty Clay Silt Control Plume Control Plume Sand Clay Date 1 3 12 7 9 13 5 10 2 6 14 16 4 8 11 15 Mar. 8 1 3 1 5 Apr. 25 2 2 1 5 June 20 1 1 1 3 July 14 1 1 1 3 Aug. 18 1 1 Oct. 10 1 1 2 E 2 0 0 2 0 0 0 0 2 6 0 1 1 2 3 0 19

Table 23 (continued)

Seasonal and Spatial Distributions of Major Benthic Animals - 1977 2

K. Gammarus sp. (No. per 0.1 m )

Substrates and Station Numbers Sand Silty Clay Silt Control Plume Control Plume sand Clay Date 1 3 12 7 9 13 5 10 2 6 14 16" 4 8 11 15 Mar. 8 2 8 4 4 2 9 29 Apr. 25 2 1 5 10 2 1 21 June 20 2 4 1 2 9 July 14 1 1 1 3 Aug. 18 0 Oct. 10 0 E 1 2 4 1 0 0 13 5 5 4 10 4 1 0 12 0 62

\.Jl N

2 L. Corophium lacustre (No. per 0.1 m)

Substrates and Station Numbers Sand Silty Clay silt Control Plume Control Plume sand Clay Date 1 3 12 7 9 13 5 10 2. 6 14 16 4 8 11 15 Mar. 8 0 Apr. 25 3 1 3 1 1 1 7 17 June 20 2 10 14 5 2 3 1 1 2 6 47 93 July 14 378 1 1 1 3 384 Aug. 18 16 1 3 6 26 Oct. 10 1 1 E 397 13 16 8 2 1 4 0 2 1 5 3 0 12 57 0 521

e Table 23 (continued)

Seasonal and Spatial Distributions of Major Benthic Animals - 1977 M. Lepidactylus dytiscus (No. per 0.1 m2)

Substrates and Station Numbers Sand Silty Clay Silt Control Plume Control Plume Sand Clay Date 1 3 12 7 9 13 5 10 2 6 14 16 4 8 11 15 Mar. 8 p 1 12 Apr. 25 3 1 4 June 20 13 1 14 July 14 2 2 4 Aug. 18 3 5 1 9 Oct. 10 2 1 3 E *O 2 19 1 22 0 0 1 0 0 0 1 0 0 0 0 46 N. Leptocheirus plumulosus (No. per 0.1 m2 )

Substrates and Station Numbers Sand Silty Clay Silt Control Plume Control Plume Sand Clay Date 1 3 12 7 9 13 5 10 2 6 14 16' 4 8 11 15 Mar. 8 3 2 3 2 7 17 Apr. 25 0 June 20 1 4 9 3 12 13 8 2 1 10 63 July 14 4 2 3 15 2 10 13 11 1 7 8 76 Aug. 18 1 3 10 12 10 8 4 19 3 1 1 8 80 Oct. 10 4 3 7 2 4 1 3 1 25 I; 9 3 9 4 0 16 13 30 14 34 20 46 17 10 3 33 261

Table 23 (continued)

Seasonal and Spatial Distributions of Major Benthic Animals - 1977 0, Cyathura polita (No. per 0.1 m2)

Substrates and Station Numbers Sand Silty Clay Silt Control Plume Control Plume Sand Clay Date 1 3 12 7 9 13 5 10 2 6 14 16 4 8 11 15 Mar. 8 1 1 3 2 7 Apr. 25 1 1 6 8 June 20 1 3 1 3 8 July 14 1 1 1 1 3 1 1 1 10 Aug. 18 1 1 1 3 1 7 Oct. 10 1 1 1 1 1 1 1 7 E 0 0 0 0 1 1 3 3 2 3 8 7 2 4 12 1 47 2

P. Dipteran larvae (No. per 0.1 m )

Substrates and Station Numbers Sand Silty Clay silt Control Plume Control Plume sand *clay Date 1 3 12 7 9 13 5 10 2 6 14 16 4 8 11 15 Mar. 8 1 1 Apr. 25 3 1 3 7 June 20 1 1 2 July 14 3 3 Aug. 18 1 1 Oct. 10 0 2... 3 3 1 1 0 0 0 0 1 5 *o 0 0 0 0 0 14

55 Results - Fouling Organisms Study The 197.7 fouling organism data appear in Tables 24 - 26.

The name Modiolus demissus has replaced the name Brachidontes recurvus .on these tables, as a result of the correction of a previous error in identification.

As mentioned in the methods section the February plates at all three stations were destroyed by river ice, and the August plates at stations DWS and CBS had separated from the towers and could not be found.

As in previous study years (Jordan et al. 1976, 1977) barnacles and the tube dwelling amphipod, Corophium lacustre, were the most numerous of the organisms collected on the sllllliller and annual fouling plates. The October plates .from station DWS, located the farthest downstream, yielded tunicates of the genus Molgula along with three species of marine algae that were not found at the two upstream stations. The August plates recovered from station CBN and the October plates recovered from all three stations were almost completely covered by ectoprocts and hydroids. This probably accounts for the lower numbers of barnacles and C. lacustre on these plates, relative to the numbers present on the June and annual plates. The hydroid -

ectoproct covering was apparently favorable for colonization by polychaetes (Nereis succinea) and epibenthic amphipods (Gammarus sp.),

which were most abundant on the October plates at each station.

56

• There was no obvious characteristic unique to the fouling organism community at station CBS, near the power plant discharge, that could be interpreted as a power plant effect in this area.

e'

57 Ta,hJ..e. 24 fouling Organisms 1977 Stati.on DWS No. O:tgartisms/dm 2 Horizontal Plate Jan-Feb Mar.~Apr May-Jun Annuali~

Barnacles Balanus sp. Lost 777 996 Bivalves Modiolus demissus 1 6 Congeria leucophaeta Amphipods Corophium lacustre 1 1076 1099 Gammarus sp. 1 5 Polychaetes Nereis succinea Scolecolepides viridis Decapods

• Rhithropandpeusliarrissi Ectoprocts Bowerbankia sp.

Membranipora tenuis X Hydroids X Dipteran Larvae Total No. of Genera (not including Hydroids and Dipteran Larvae) 2 3 5

/

Total No. of Organisms (not including e Bryozoans and Hydroids) 2 1854 2106 Vertical Plate Barnacles Balanus sp. Lost 576 1099 Bivalves Modiolus demissus 1 Congeria leucophaeta Amphipods Corophium lacustre 154 1039 Gammarus sp. 1 7 Polychaetes Nereis succinea Scolecolepides viridis Decapods Rhithropanopeus harrissi Ectoprocts Bowerbankia sp.

Membranipora tenuis X Hydroids X Dipteran Larvae Total No. of Genera (not including Hydroids and Dipteran Larvae} 1 4 3 Total No. of Organisms (not including Bryozoans and Hydroids) 1 738 2138 e *Incubated from 3-8-77 to 6-20-77

58 Table 24 (continued)

Fouling Organisms 1977 Station DWS No. Organisms/dm2 Horizontal Plate Jul-Aug Sep-Oct* Nov-Dec Barnacles Balanus sp. Lost 169 Bivalves Modiolus demissus Congeria leucophaeta Amphipods Corophium lacustre 31 Gammarus sp. 177 3 Leptocheirus plumulosus 3 Polychaetes Nereis succinea Scolecolepides viridis Decapods Rhithropanc)pew; harrissi Ectoprocts Bowerbankia sp.

Membranipora tenuis X Hydroids X Dipteran Larvae Tunicates Molgula sp. 9 Algae Polysiphonia harveyi X Ceramium rubrum X Enteromorpha sp. X Total No. of Genera (not including Algae, Hydroids, and Dipteran Larvae) 6 1 Total No. of Organisms (not including Algae, Bryozoans, and Hydroids) 389 3 Vertical Plate Barnacles Balanus sp. Lost 136 Bivalves Modiolus demissus Congeria leucophaeta Amphipods Corophium lacustre 5 3 Gammarus sp. 363 2 Polychaetes Nereis succinea 6 Scolecolepides viridis Decapods Rhithropanopeus harrissi Ectoprocts Bowerbankia sp.

Membranipora tenuis X Hydroids X Dipteran Larvae Tunicates Molgula sp. 8 Algae Enteromorpha sp. X Total No. of Genera (not including Algae, Hydroids, and Dipteran Larvae) 6 2 Total No. of Organisms (not including Algae, Bryozoans, 518 5 and Hydroids)

• Incubated from 9~12-77 to 10-31-77

59

- Table 25 Fouling Organisms 1977 Station CBN No. Organisms/dm2 Horizontal Plate Jan-Feb Mar-Apr May-Jun Annual*

Barnacles Balanus sp. Lost 1249 748 Bivalves Modiolus demissus Congeria leucophaeta 7 2 Amphipods Corophium lacustre 1 1366 1333 Gammarus sp. 1 10 1 Polychaetes Nereis succinea Scolecolepides viridis Decapods Rhithropanopeus harrissi Ectoprocts Bowerbankia sp.

Membranipora tenuis Hydroids X X X Dipteran Larvae 3 Total No. of Genera (not including Hydroids and Dipteran Larvae) 2 4 4 Total No. of Organisms (not including e Bryozoans and Hydroids) 5 2632 2084 Vertical Plate Barnacles Balanus sp. Lost 1414 1590 Bivalves Modiolus demissus Congeria leucophaeta 1 Amphipods Corophium lacustre 549 1502 Gammarus sp. 2 1 1 Leptocheirus plumulosus 1 Polychaetes Nereis succinea Scolecolepides viridis Decapods Rhitnropanopeus narrissi Ectoprocts Bowerbankia sp.

Membranipora tenuis Hydroids X X Dipteran Larvae 1 Total No. of Genera (not including Hydroids and Dipteran Larvae) 2 4 3 Total No. of Organisms (not including Bryozoans and Hydroids) 4 1965 3093 e *Incubated from 3-8-77 to 6-20-77

60

- Table 25 (continued)

Fouling Organisms 1977 Station CBN No. Organisms/dm2 Horizontal Plate Jul-Aug Sep-Oct Nov-Dec Barnacles Balanus sp. 80 14 Bivalves Modiolus demissus 4 Macoma mitchelli 2 Congeria leucophaeta 1 1 Amphipods Corophium lacustre 20 20 1 Gammarus sp. 25 5 Polychaetes Nereis succinea 12 20 Scolecolepides viridis Decapods Rhithropanopeus* harrissi 6 Palaemonetes vulgaris 1 Ectoprocts Bowerbankia sp.

Membranipora tenuis X X Hydroids X X Dipteran Larvae.

Total No. of Genera (not including Hydroids and Dipteran Larvae) 6 9 2

- Total No. of Organisms (not including Bryozoans and Hydroids)

Vertical Plate 119 87 6 Barnacles Balanus sp. 65 34 Bivalves Modiolus demissus 2 Congeria leucophaeta 1 Amphipods Cqrophium lacustre 5 9 1 Gammarus sp. 12 1 Polychaetes Nereis succinea 8 13 Scolecolepides viridis Decapods Rhithropanopeus harrissi 7 5 Ectoprocts Bowerbankia sp.

Membranipora tenuis X X X Hydroids X X Dipteran Larvae Nudibranch 1 Total No. of Genera (not including Hydroids and Dipteran Larvae) 5 9 2 Total No. of Organisms (not including Bryozoans and Hydroids) 85 77 2

61 Table 26 Fouling Organisms 1977 Station CBS No. Organisms/dm 2 Horizontal Plate Jan-Feb Mar-Apr May-Jun Annual*

Barnacles Balanus sp. Lost 551 329 Bivalves Modiolus demissus 3 Congeria leucophaeta 7 4 Amphipods Corophium lacustre 1 1410 1323 Gammarus sp. 5 1 1 Leptocheirus plumulosus 1 1 Polychaetes Nereis succinea Scolecolepides viridis Decapods Rhithropanopeus harrissi Ectoprocts Bowerbankia sp.

Membranipora tenuis X X Hydroids X X Dipteran Larvae Total No. of Genera (not including Hydroids and Dipteran Larvae) 3 7 5 e Total No. of Organisms (not including Bryozoans and Hydroids) 7 1973 1657 Vertical Plate Barnacles Balanus sp. Lost 348 186 Bivalves Modiolus demissus 1 Congeria leucophaeta 1 1 Amphipods Corophium lacustre 1126 1124 Gammarus sp. 4 8 30 Leptocheirus plumulosus 3 2 Polychaetes Nereis succinea Scolecolepides viridis Decapods Rhithropanopeus harrissi Ectoprocts Bowerbankia sp.

Membranipora tenuis X X Hydroids X X Dipteran Larvae 1 Total No. of Genera (not including Hydroids and Dipteran Larvae) 2 5 7

- Total No. of Genera (not including Bryozoans and Hydroids)

• Incubated from 3-8-77 to 6-20-77 7 1483 1345

62

- Table 26 (continued)

Fouling Organisms 1977 Station CBS No. Organisms/dm 2 Horizonta.1 Plate Jul-Aug S~p-Oct* Nov-Dec Barnacles Balahus sp. Lost 36 Bivalves Modiolus demissus 3 Congeria leucophaeta Amphipods Corophium lacustre 41 6

- Gammarus sp. 65 11 Polychaetes Nereis succinea 19 Scolecolepides viridis Decapods Rhithropan~peus harrissi Ectoprocts Bowerbankia sp.

Membranipora tenuis X X Hydroids X Dipteran Larvae Total No. of Genera (not including Hydroids and Dip_teran Larvae) 6 3 Total No. of Organisms (not including e Bryozoans and Hydroids) 164 17 Vertical Plate Barnacles Balanus sp. Lost 53 Bivalves Modiolus demissus 1 Congeria leucophaeta Amphipods Corophium lacustre 23 6 Gammarus sp. 77 6 Leptocheirus plumulosus 3 Polychaetes Nereis succinea 17 Scolecolepides viridis Decapods -Rhi thr9panopeus harr-issi Ectoprocts Bowerbankia sp.

Membranipora tenuis X X Hydroids X X Dipteran Larvae Total No. of Genera (not including Hydroids and Dipteran Larvae) 6 3 Total No. of Organisms (not including Bryozoans and Hydroids) 174 12

- *Incubated from 9.-12.,..77 to 10...,..31..,..77

63 Conclusions Analysis of the 1977 plankton and benthos data from the vicinity of the Surry Power Station yielded results that are consistent with the findings in previous study years (Jordan et al.

1976, 1977). The effects of the power plant on the river phyto-plankton community on the upstream side of Hog Point mainly resulted from the introduction of water pumped from the downstream side, that was either richer or poorer in certain species than the upstream receiving water. Destruction of plant entrained phyto-plankton occurred in the summer months, but reduced population densities were not detected in the river itself beyond the immediate vicinity of the discharge canal mouth. Modification of the discharge area zooplankton community by the introduction of organisms pumped from the intake side of Hog Point or released into the cooling water by species residing within the intake and discharge canals was observed, but destruction of entrained organisms was not detected in the 1977 study. The power plant discharge plume may have affected four benthos species, but the only indisputable damage to an invertebrate population observed during the 1977 study was the winter kill of Rangia cuneata, from which rapid recovery was achieved.

64 References Jordan, R. A., R. K. Carpenter, P. A. Goodwin, C. G. Becker, M. S. Ho, G~ C. Grant, B. B. Bryan, J. v. Merriner, and A. D.

Estes. 1976. Ecological Study of the Tidal Segment of the James River Encom assin Ho Point 1975 Final Technical Report. VIMS Spec. Sci. Report No. 7 . Va. Inst. Mar. Sci.,

Gloucester Point, Va. 476 pp.+ Appendices Jordan, R. A., P.A. Goodwin, R. K. Carpenter, J. V. Merriner, A. D. Estes, and R .. K. Dias. 1977. Ecological Study of the

• Tidal Se ment of the James River Encom assin Ho Point 1976 Final Tee n1.ca Report. VIMS Spec. Sc 1.. Report No. , Va.

Inst. Mar. Sci., Gloucester Point, Va. 440 pp.

• Steel, R. J. and J. H. Torrie. 1960. Principles and Procedures of Statistics with S Reference to the Biolo ical Sciences.

New Yor : McGraw-Hi pp.

e

Appendix A Hydrographic Data Tables 65

Tabl-1 e James River Hydrographic Data 1977 Plankton Sampling Runs Station Date Parameter DWS INTAKE HPS HPW3 HPW2 HPWl DISCHARGE CBE CBC JI 2-23 Time (EST) 1040 1106 1147 1215 1236 1300 1325 1347 1408

• 1441 Secchi Depth (cm) 89 57 65 75 67 87 55 95 62 39 Sample Depth (m) 0 0 0 0 0 0 0 0 0 0 Temp. (OC) 5.25 5.40 6.10 5.05 5.15 6.65 13.20 6. 35

• 5.10 4.00 Sal. (%} 4.73 7.01 3.85 2.16 2.17 3.46 6.53 2.51 2.15 1.19.

D.O. (mg/1) 11.68 12.79 11.17 12.44 11. 73 12.42 11. 52 12.10 12.12 Sample Depth (m) .75 3.5 2 1 1. 5 1 1 1 1 4 Temp. (OC) 4.80 5.40 6.00 5.10 5.00 6.60 13.20 6.40 5.15 4.20 Sal. (%.) 4.90 7.08 3.84 2.25 2.29 3.45 6.54 2.57 2.15 1. 74 D.O. (mg/1) 11.60 12.30 12.07 11. 70 11.68 12.18 10.49 13.10 12.54 Sample l)epth (m) 1.5 7 4 2 3 2 2 8 °'

Temp. (OC) 4.45 6.30 6.15 4.70 5.00 13.35 5.85 4.35 °'

Sal. (%) 5.91 7.36 3.90 2.44 2.78 6.58 2.94 1. 75 D.O. (mg/1) 11. 83 12.69 11. 95 11. 97 12.94 12.10 12.01 4-13 Time (EST) 1040 1111 1141 1203 1224 1245 1303 1345 1405 1426 Secchi Depth (cm) 55 35 35 63 38 49 31 63 62 52 Sample Depth (m) 0 0 0 0 0 .25 0 0 0 0 Temp.' (°C) 16.40 17.80 17.80 16.95 16.90 21. 60 22.10 24.60 17.00 15.40 Sal. (%.) 0.12 0.21 0.16 0.10 0.13 0.19 0.24 0.14 0.09 0.10 D.O. (mg/1) 11.11 9.53 9.45 10.03 9.00 9.49 8.96 10.88 9.87 9.45 Sample Depth (m) 1 4 2.25 1 I 1. 25 1 .5 . 75 2.5 Temp. (OC) 16.40 17.15 17.50 16.90 16.95 22.20 24.20 17.20 15.40 Sal.- (%.) 0.12 0.19 0.16 0.10 0.14 0.24 0.14 0.09 D.O. (mg/1) 10.28 9.36 9.04 10.24 9.87 8.59 9.32 9.08 Sample Depth (m) 2 8 4.5 2 2.5 2 1.5 5 Temp. (OC) 16.75 17.15 17.65 16.85 17.10 22.50 17.40 15.55 Sal. (%.} 0.12* 0.19 0.16 0.10 0.13 0.24 0.09 0.09 D.O. (mg/1) 9.94 9.40 9.26 10. 79 8.91 8.91 9.62 10.09

Table Al entinued)

Station Date Parameter DWS INTAKE RPS HPW3 HPW2 HPWl DISCHARGE CBE CBC JI 5-12 Time (EDT) 1008 1057 1130 1155 1210 1228 1255 1353 1410 1440 Secchi Depth (cm) 55 36 46 40 47 54 46 44 52 46 Sample Depth (m) 0 0 0 0 0 0 0 0 0 0 Temp. (oC) 18.00 18.10 19.35 18.70 18.65 19.45 23.10 19.50 18.75 18.80 Sal. (%) 4.78 6.24 2.28 2.29 2.42 1. 91 6.26 1.08 1.05 0.86

• D.O. (mg/ 1) 8.42 7.50 8.10 8.12 8.54 _ 8. 68 7 .40 9.34 8.30 8.76 Sample Depth (m) 1 3.75 2.5 1 1. 5 1 1 1 1 3 Temp. (oC) 18.10 18.15 19.10 18.70 18.60 19.45 23.50 19.20 18.80 18.75 Sal. (%.) 4.78 6.24 2.89 2.30 2.44 2.66 6.27 1.11 1.04 0.87 D.O. (mg/1) 7.78 7.54 8.98 7.92 8.34 8.40 7.14 8.50 8.08 8.62 Sample Depth (m) 2 7.5 5 2 3 2 2 6 Temp. (o C) 18.30 18.25 19.20 18.70 18.75 23.40 19.00 18.80 Sal. (%) 4.87 6.32 3.06 2.38 2.48 6.21 1. 04 1. 37 D.O. (mg/1) 8.10 7 .40 7.82 8.00 8.46 7.24 8.06 8.04 6-13 Time (EDT) 1103 1138 1212 1240 1308 1334 1400 1440 1511 1542 0\

Secchi Depth (cm) 91 42 67 82 73 74 45 82 74 60 "

Sample Depth (m) 0 0 0 0 0 0 0 0 0 0 Temp. (o C) 22.95 22.90 24.10 23.70 23.40 25.30 30.80 25.50 24.30 22.70 Sal. (%-) 7.26 8.03 6.01 4.68 5.86 5.27 8.23 3.74 4.21 2.87 D.O. (mg/1) 6.89 6.48 6.35 8.01 6.40 6.99 6.62 7.50 7.50 6.35 Sample Depth (m) 1 4 2.5 1 1. 5 1 1 1 1. 5 2 Temp. (o C) 22.55 23.00 23.40 23. 70 23.40 25.05 30.80 25.30 24.20 22.70 Sal. (%,) 7.82 8.04 6.22 4.70 5.88 5.55 8.23 4.37 4.44 2.88 D.O. (mg/1) 7.27 6.74 6.74 . 7. 01 5.13 4.56 7.46 7.07 6.78 Sample Depth (m) 2 8 5 2 3 2 3 4 Temp. (oC) 22.25 22.70 22. 70 23.40 23.10 30.80 24.60 22.90 Sal.* (rJ 8.93 8.28 7. 8,8 4.76 6.08 8.17 4.59 3.09 D.O. (mg/1) 7.03 6. 72 6.82 7.17 7.27 5.01 6.27 4.64

Table Al 4lt,ntinued)

Sta.tion Date Parameter DWS INTAKE HPS HPW3 HPW2 HPWl DISCHARGE CBE CBC . JI 7-12 Time (EDT) 1040 lll5 ll40 1204 1238 1257 1317 1403 1437 1517 Secchi Depth (cm) 74 29 53 43 58 51 40 77 75 Sample Depth (m) 0 0 0 0 0 0 0 0 0 0 Temp. (QC) 28.50 28.60 30.30 29.65 31.10 30.85 33.80 30.50 29.80 29.80 Sal. (%.) 9.87 10.07 8.20 6.58 7.37 7.12 10.09 6.55 5. 71 4.63 D.O. (mg/1) 6.62 6.76 6.78 7 .10 7.38 6.64 5.86 7.92 6.14 7.26 Sample Depth (m) 1 3.5 2.5 1 1. 5 1 1 ~75 1.5 3.5 Temp. (QC) 28.50 28.60 29.80 29.80 30.00 30.85 33.80 30.50 29.75 29.60 Sal. (%J 6.53 10.20 8.64 6.63 7.43 7.12 10.12 6.44 6.02 5.16 D.O. (mg/1) 6.42 7.04 6.32 6.38 7.06 6.48 5.96 7.22 6.24 5.98 Sample Depth (m) 2 7 5 2 3 2 1. 5 3 7 Temp. (QC) 28.50 28.70 29.60 29.80 29.65 33.70 30.70 30.00 29.60 Sal. (%,) 10. 09 10.21 9.07 6.65 7.66 .10.09 6.53 6.70 5.19 D.O. (mg/1) - 6. 96 6.46 6.10 6.14 5.76 6.10 7.08 5.74 6.20

°'

00 7-21 Time (EDT) 1042 -1248 Secchi Depth (cm). 38 43 Sample Depth (m) 0 0 Temp. (°C) 30.10 34.90 Sal. (%,) 9.30 9.42 1

D.O. (mg/1) 5.76 5.94 Sample Depth (m) 3.75 1 Temp. ( oc) 29.95 34.85 Sal. (%-) 9.43 9.42 D.O. (mg/1) 5.94 4. 71 Sample Depth (m) 7.5 2 Temp. CQC) 29.90 34.90 Sal. (%) 9.54 9.41 D.O. (mg/1) 5.88 5.80

Table Al e,ntinued)

Station Date Parameter DWS INTAKE HPS HPW3 HPW2 HPWl DISCHARGE CBE CBC JI 8-16 Time (EDT) 1050 1123 1148 1212 1236 1257 1320 1430 1455 1515 Secchi Depth (cm) 110 54 34 64 60 70 50 82 68 72 Sample Depth (m) 0 0 0 0 0 0 0 0 0 0 Temp. (o C) 29.15 29.35 2 9. 60 29.70 29.75 31.10 37.30 32.20 29.80 30.05 Sal. (%.) 10. 73 .11. 55 10. 75 8.60 9.18 . 10. 26 11. 79 9.64 10.82 7. 92 D.O. (mg/1) 6.80 6.44 6.30 6.24 6.18 6.30 6.40 6. 92 6.92 7.63 Sample Depth (m) 1 4 2 1. 25 1. 5 1 1 1 1.5 3.5 Temp. (oc) 29.00 29.30 29.55 29.75 29.80 31. 00 37.20 32.00 29.75 29.70 Sal. ( %,.) 10.84 11. 57 10. 74 8.60 9.69 10. 26 11. 79 9.66 10.01 9.11 D.O. (mg/1) 6.44 6.78 6.08 7.00 6.48 6.52 5.99 6.52 6.78 6.48 Sample Depth (m) 2 8 4 2.5 3 3 2* 3 7 Temp. (oc) 28.60 29.40 29.50 29.75 29.90 31.05 37.20 29.85 29.40 Sal. (%d 12.19 11. 58 10. 75 8.65 9.64 10. 29 11. 75 10.13 9.18 D.O. (mg/1) 6.12 6.88 6.40 6.12 6.56 6.64 6.50 5.17 6.58

°'

\0 9-6 Time (EDT) 1040 1115 1149 1219 1244 1311 1339 1422 1447 1516 Secchi Depth (cm) 110 70 70 95 90 85 67 65 112 97 Sample Depth (m) 0 0 0 0 0 0 0 0 0 0 Temp. (o C) 28.20 28.00 30.80 29.55 29.20 31.15 36.20 30.30 29.45 29.40 Sal. (%,) 11. 28 12.85 10.85 8.50 8.94 10.28 12. 71 8.40 8.04 6.65 D.O. (mg/1) 8.78 7.34 7.08 7. 92 7.66 7.72 7.28 8.86 8.00 8.98 Sample Depth (m) 1 3.5 2.25 1 1. 5 1 1 .5 1.5 4 Temp. (DC) 28.20 27.95 30.55 29.50 29.25 32.00 35.90 30.40 29.40 28.70 Sal. (%,) 11. 33 12.92 10. 60 8.61 8.95 10. 66 12. 71 8.49 8.08 7.78 D.O. (mg/1) 7.76 7.48 8.74 7.62 7. 72 7.12 7.34 9.04 8.08 7.20 Sample Depth (m) 2 7 4.5 2 3 2 3 8 Temp. (DC) 28.30 27.95 30.90 29.45 29.40 35.60 29.40 28.85 Sal. (%;) 12.72 13.00 10.86 9.17 8.94 12.70 8.23 8.50 D.O. (mg/1) 7.42 7.66 7.16 7.32 7.46 6.94 8.18 7.10

Table Al ~ntinued)

/

Station Date Parameter DWS INTAKE HPS HPW3 HPW2 HPWl DISCHARGE CBE CBC JI 11-9 Time (EST) 1050 1120 1153 1447 1424 1220 1244 1334 1358 1528 Secchi Depth (cm) 107 71 6'6 45 49 64 58 79 69 42 Sample Depth (m) 0 0 0 0 0 0 0 0 0 0 Temp .. (°C) 18.60 19.00 19.40 18.20 18.50 19.70 26.90 19.00 18.50 18.00 Sal. (%,) 8.24 8.42 6.86 3.65 4.50 5.81 8.63 4.24 3.32 2.39 D.O. (mg/1) 8.21 7.99 8.03 7.74 8.41 8.37 7.58 9.04 8.84 7.50 Sample Depth (m) 1.25 4 2.5 1. 25 1. 5 1 1 1 1. 75 4 Temp. (OC) 18.50 18.80 19.40 18. 20 18.50 19.70 26.80 19.20 18.40 18.00 Sal. (%,) 8.50 8.50 6.89 3.79 4.54 5.82 8.63 4.37 3.88 2.62 D.O. (mg/1) 8.56 7.88 7.95 8.49 8.11 7.60 7.68 8.25 8.05 7.99 Sample Depth (m) 2.5 8 5 2.5 3 2 3.5 8 Temp. (° C) 18.40 18.60 19.40 18.30 18.60 26.60 18.60 18.00 Sal. (%.:) . 9. 20 8. 70 6.93 4.03 4.56 8.60 4.32 2.74 D.O. (mg/1) 7.76 7.99 8.05 8.25 8.68 7.74 8.01 7.74

-..J 0

e e e Table A2 James River Hydrographic Data 1977 Benthos Sampling Runs Date Station 6 12 14 16 15 13 11 10 3-8 Time (EST) 1302 1253 1226 1156 1209 1235 1243 1311 Secchi Depth (cm) 53 71 86 88 90 110 38 61 Sample Depth (~) 0 0 0 0 0 0 0 0 Temp. (oc), 10.25 10.20 10.20 9.80 9.80 10.50 10.15 10.20 Sal. (%J 1.85 2.66 3.79 4.87 5.99 4.51 3.80 2.27 D.O. (mg/1) 11.25 11.55 11.84 12.30 12.74 12.66 11.52 11.38 Sample Depth (m) 1.5 1 6 2 1 1 5 4.5 Temp. (oc). 10.15 10.20 9.70 9.25 9.70 10.30 10.15 9.90 Sal. (%.,) 1,. 87 2. 67. 4.62 6.33 5.79 4.55 3.81 3.06 D.O. (mg/1) 11.00 11.65 11. 38 11. 80 12.41 12.36 11. 92 11.59

-.J Station 5 9 8 7 4 3 2 1 Time (EST) 1318 1327 1337 1428 1439 1449 1457 1504 Secchi Depth (cm) 65 92 72 74 72 120 97 89 Sample Depth (m) 0 0 0 0 0 0 0 0 Temp. ( oc) 10.10 11. 60 11.60 10. 90 10.40 10. 25 10.10 10.40 Sal. (%) 2.96 3.49 3.26 2.08 2.51 1.84 1.69 1. 54 D.O. (mg/1) 11. 61 12.55 11. 31 12.49 11. 59 12.74 12.93 13.58 Sample Depth (m) 3.5 1 4 1 3 2 2 1 Temp. ( oc) 9.90 11.40 11. 45 11.00 10.20 10.10 9.80 10.30 Sal. (%) 3.04 3.47 3.38 2.12 2. 46- 1.85 1. 72 1.52 D.O. (mg/1) 11.82 12.05 12.05 13.90 12.22 11.94 12.05 13.52

e Table A2 (continued)

James River Hydrographic Data 1977 Benthos Sampling Runs Date Station 6 12 14 16 15 13 11 10 4-25 Time (EDT) 1050 1113 1126 1150 1200 1214 1219 1228 Secchi Depth (cm) 35 55 65 48 43 44 46 49 Sample Depth (m) 0 0 0 0 0 .5 0 0 Temp. (OC) 19.40 20.35 20.70 20.80 19.60 20.40 20.60 20.95 Sal. (%) 0.12 0.14 0.34 0.91 0.99 0.65 0.55 0.36 D. O. (mg/1) 9.74 11. 21 10.84 8.90 9.26 8.96 8.01 9.30 Sample Depth (m) 1. 5 7 2 .75 4 4.5 Temp. (OC) 19.20 20.10 20.05 19.30 20.30 20.15 Sal. (%.) 0.11 1. 62 1. 68 0.94 0.59 0.33 D.O. (mg/1) 9.85 7.97 8.85 9.95 9.09 9.74

-..J N

Station 5 9 8 7 4 3 2 1 Time (EDT) 1236 1245 1254 1313 1320 1332 1340 1347 Secchi Depth (cm) 45 52 55 54 53 77 58 54 Sample Depth (m) 0 0 0 .5 0 0 0 0 Temp. (o C) 20.85 22.20 21.70 22.00 21.05 21.10 20.90 20.60 Sal. (%,) 0.44 0.73 0.43 0.34 0.19 0.10 0.13 0.08 D.O. (mg/1) 9.07 8.35 8.25 9. 72 10.08 10.75 10.60 11. 01 Sample Depth (m) 4 1 4 2 1. 5 1.5 1 Temp. (a C) 20.45 22.20 20.40 20.60 20.10 19.50 20.40 Sal. (%.) 0.43 0.75 0.31 0.20 0.10 0.30 0.08 D.O. (mg/1) 7.81 8.76 8.31 10.02 10.43 10.02 10. 91

e e Table A2 (continued) e James Rivet Hydrographic Data 1977 Benthos Sampling Runs Date Station 6 12 14 16 15 13 11 10

• 6-20 Time (EDT) 1009 1043 1059 1126 1148 1203 1213 1226 Secchi Depth (cm) 55 69 70 67 38 46 52 71 Sample Depth (m)

• 0 0 0 0 0 0 0 0 Temp. ( °C) 26.80 26.60 26.00 25.80 25.90 26.60 27.70 27.20 Sal. (i.J 4.05* 5.11 6.10 7.32 8.76 7. 77 6.50 4.59 D.O. (mg/1) 8.67 7.74 7.18 6.98 7.42 6.96 6.49 7.46 Sample Depth (m) 1 .5 7.5 2 .5 .5 4.5 4 Temp. ( oC) 26.20 25.80 25.60 25.40 26.00 26.60 27.40 26.60 Sal. (%.;) 4.58 5.50 6.55 7.82 8.74 7.78 6.88 5.12 D.O. (mg/1) 7.40 6.91 6.87 6.85 7.00 6.65 6.35 6.47 w

Station 5 9 8 .7 4 3 2 1 Time (EDT) 1234 1243 1254 1355 1404 1414 1424 1432 Secchi Depth (cm) 60 70 69 80 69 91 78 82 Sample Depth (m) 0 0 0 0 0 0 0 0 Temp. ( oC) 27.00 29.60 27.40 27.95 27.20 28.75 27.80 27.90 Sal. (%J 4.54 6.54 4.22 4.64 5.22 4.41 4.44 3.96 D.O. (mg/1) 8.13 7 .56

• 7.92 9.68 . 7. 28 9.64 8.63 9.24 Sample Depth (m) 3 1 4 1 3 1 2 1 Temp. (°C) 26.30 28 .90 27.60 27.85 28.30 28.40 27.30 27.60 Sal. (i.J 4.92 6.47 5.66 4.66 5.90 4.43 4.41 3.96 D.O. (mg/1) 6. 77 7.30 7.04 8.79 6.55 9.90 8.59 8.91

e e e*

Table A2 (continued)

James River Hydrographic Data 1977 Benthos Sampling Runs Date Station 6 12 14 16 15 13 11 10 7-14 Time (EDT) 1025 1037 1048 1105 1117 1130 1142 1153 Secchi Depth (cm) 39 44 54 52 40 46 50 53 Sample Depth (m) 0 .5 0 0 '5 .5 Q 0 Temp. (° C) 29.60 29.80 29.80 29,60 29.60 29.90 30.00 30.50 Sal. (%.) 5.89 6.33 7.44 8.39 9.01 9.06 7.97 7.68 D.O. (mg/1) 6.38 7.09 7.42 6.99 6.91 7.72 7 .11 6.35 Sample Depth (m) 1. 5 6.5 2 4.5 4.5 Temp. (OC) 29.80 29.60 29.35 29.65 30.20 Sal. (%.) 6.19 7.97 8.25 8.06 7.75 D.O. (mg/1) 6.42 5.93 6.95 7.01 6.33

-...J

.p..

Station 5 9- 8 7 4 3 2 1 Time (EDT) 1201 1213 1219 1234 1228 1242 1250 1302 Secchi Depth (cm) 45 69 56 60 55 61 46 63 Sample Depth (m) 0 .5 0 .5 0 .5 0 .75 Temp. (OC) 29.90 31. 05 30. 70 31. 30 30.80 30.80 30.10 30.20 Sal. (%.) 6,89 7.02 6.52 6.45 6.38 5. 77 5.32 5.30 D.O. (mg/1) 7.03 8.85 *7.62 8.31 7.56 8.40 7.62 7.76 Sample Depth (m) 3 4 2 2 Temp. (o C) 29.80 30.35 30.40 29.70 Sal. (%) 6. 92 7.41 6.51 5.46 D.O. (mg/1) 6.58 6.78 6.62 6.29

e e e Table A2 (continued)

James River Hydrographic Data 1977 Benthos Sampling Runs Date Station 6 12 14 16 15 13 11 10 8-18 Time (EDT) 0740 075Q 0805 0818 0832 0844 0855 0907 Secchi Depth (cm) 39 60 75 I 93 30 51 62 55 Sample Depth (m) 0 ,5 0 0 .5 .5 0 0 Temp. (OC) 27.20 27.00 28.40 27.30 26.30 28.90 29.00 28.40 Sal. (%) 7.17 8.34 9. 72 11.05 11. 72 10.07 9.59 8.30 D.O. (mg/1) 5.74 5.62 6.60 6.36 6.00 5.62 6.22 6.22 Sample Depth (m) 1 7 1.5 4 3 Temp. (OC) 26.80 28. 70 27.80 28.90 28.50 Sal. (%) 7.47 10. 64 11. 96 9.84 8.48 D.O. (mg/1) 6.32 6.28 5.70 5.44 6.12

~

Lil Station 5 9 8 7 4 3 2 .I Time (EDT) 0915 0923 1001 1023 1013 1034 1044 1055 Secchi Depth (cm) 52 59 57 57 51 46 58 65 Sample Depth (m) 0 .5 0 .5 0 .5 0 .5 Temp. (OC) 28.40 30.80 28.40 27.10 28.00 26.90 27.80 27.40 Sal. (%J 7.47 10.66 7.68 7.66 6.98 7.48 7.82 6.80 D.O. (mg/1) 5. 72 5.92 6.28 6.26 6.46 6.26 5.96 5.84 Sample Depth (m) 3 4 2.5 /

2 Temp. (OC) 28.15 28.20 27.90 27.50 Sal. (%-) 7.50 8.76 7.00 7.80 D.O. (mg/1) 6.14 6.06 5,76 6,44

e Table A2 (continued)

James River Hydrographic Data 1977 Benthos Sampling Runs Date Station 6 12 14 16 15 13 11 10 10-20 Time (EDT) 0804 0820 0830 0844 0856 0912 0920 0940 Secchi Depth (cm) 72 87 80 99 54 23 58 49 Sample Depth (m) 0 .75 0 0 .75 .75 0 0 Temp. (OC) 13.30 13;20 13.20 12.90 13. 20 13.20 15.00 14.20 Sal. (%) 9.27 9.84 12.17 11.82 13.20 12.82 10.68 11. 07 D.O. (mg/1) 8. 72 8.78 8.44 8.36 8.56 9.00 9.04 8.76 Sample Depth (m) 1.5 7.5 2 4 5 Temp. (°C) 13.20 13. 60 12.80 14.40 13.50 Sal. (%.) 9.18 14.01 11. 97 10.90 10.84 D.O. (mg/1) 8.42 8.56 8.62 8.40 8.82

-.._j Station 5 9 8 7 4 3 2 1 °'

Time (EDT) 0948 0955 1009 1035 1020 1045 1055 1105 Secchi Depth (cm) 60 60 70 54 63 52 101 84 Sample Depth (m) 0 . 75 0 .75 0 .75 0 .75 Temp. (OC) . 14. 00 14.80 16.00 13.00 14.10 13.50 13.50 13.60 Sal. {%_..) 10.65 10. 32 10.50 8.39 8.65 9. 08 8.61 8.20 D.O. (mg/1) 8.24 8.86 8.24 9.02 9.57. 9.75 8.86 9. 77 Sample Depth (m) 3 3.5 2 2 Temp. (OC) 13.80 17.20 14.00 13.50 Sal. (%.) 10. 68 11. 25 9.58 8.60 D.O. (mg/1) 9.*02 7.85 8.42 9.19

Appendix B Biological Data Tables for the Plankton Studies e

77

e Table Bl James River Chlorophyll Concentrations, 1977

(µg Chl ~ per liter, surface samples, two samples per station)

Date Station Feb. 23 Apr. 13 May 12 June 13 July 12 Aug, 16 Sept .. 6* Nqy, 9 DWS 7.0 8.1 7.5 3.2 5,5 4,3 5,5 2,4

'5.6 10.9 6.8 3.2 5.7 4.3 7.1 1,7 Intake 10.0 7.1 6.7 6.3 8,8 11, 3 12,2 2,5 9.1 5.8 6.7 5.4 8.2 10._3 9._6 2,7 RPS 10.3 7.4 5.7 3,2 5,3 8,8 7,8 2,2 10.1 6.3 6.9 3.0 6.7 10.3 9.2 2,6 HPW3 5.9 13.1 10. 6 5.0 10.5 10.3 2._8 5.2 11. 4 10. 9 5.0 7.9 10, 6 3,2 HPW2 4.7 8.4 12.0 5.6 7.0 11,2 2,3 "00 6.5 8.3 11. 6 4.8 8,1 11,8 2,2 HPWl 4.9 3.2 3.9 3.0 7.5 11. 0 1,6 7.0 4.7 3.2 2.8 8,8 9,5 1,7 Discharge 9.4 6.4 5.7 3.4 6,7 10.6 2._l 5.8 6.7 5.0 3.8 5.8 9.4 2.2 CBE 3.7 4.7 6.3 3.2 8.8 8.2 2,3 2.7 4.2 5.8 5.0 8.6 7, 0 2,0 CBC 5.0 4. 1 4.9 4.5 4,5 9,5 2d 5.4 4.1 4.6 4.2 4,5 9,5 2,0 JI 4.5 8.5 8.8 4.6 7,2 7,8 2,9 5.8 7. 1 9.1 5.1 7,2 8.0 2.7

'~ Reliable r'esults obtained for only three stations.

Tae B2 James River Phytoplankton Cell Counts, 1977 (Total cells per ml, surface samples, two samples per station)

Date Station Feb. 23 Apr. 13 May 12* June 13 July 121;* July 21 Aug. 16 Sept. 6 Nov. 9 DWS 4700 7750 1600 2150 2800 1400 2050 600 4100 7750 1850 2350 2100 2050 2150 750 Intake 5900 2000 1850 1200 1500 1900 2700 2700 800 5800 2200 1550 USO 1450 1300 2250 3450 900 RPS 3150 1900 3400 850 1200 1600 2700 650 3900 1950 3950 850 1100 1500 2500 750 HPW3 2450 8850 4250 2100 2000 2650 3650 450 2800 7300 3900 2150 2050 2950 3900 650 HPW2 2250 2500 4300 2200 3550 2250 3900 400 2550 3400 4000 1900 3450 1950 3900 400 HPWl 3350 1900 2000 1050 1350 2100 3000 450 .......

\0 2550 1850 2000 1000 1300 2500 2800 400 Intake Canal 7500 2850 1000 1650 1050 2450 3350 750 (Upstream) 6600 2600 1600 1700 1750 2550 3400 750 Intake Canal 6850 2900 1500 1350 1900 2600 3250 500 (Downstream) 4650 2600 1200 1250 1300 2250 2850 600 Discharge Canal 5850 2800 1650 1300 1400 1300 2550 550 5850 2000 1800 UOO 1900 1400 2150 500 Discharge 4800 1700 850 600 750 1200 1150 2050 350 4800 2350 850 700 UOO 1100 1400 1650 400 CBE 2550 4700 4100 3150 2600 1850 2800 800 2850 3450 5650 3400 2900 1800 2550 750 CBC 2300 4000 3650 1550 USO 1700 3750 750 2200 3700 3700 1200 900 1750 4550 850 JI 1100 4400 5600 1700 3850 2800 3550 700 1000 5900 6250 2000 3850 2750 3350 500 t, Canal samples taken May 13

• • Canal sampling missed, run on July 21

e Table B3 James River Phytoplankton 2-23-77 Dominant Organisms (cells per ml, 2 samples per station)

Stations INTAKE INTAKE CANAL CANAL DISCHARGE Organisms DWS INTAKE HPS HPW3 HPW2 HPWl UP DOWN CANAL DISCHARGE CBE CBC JI Cryptophyta 8 µ Chroomonas sp. 13 78 26 39 52 26 13 26 13 26 13 65 52 13 52 26 26 26 13 52 52 13 39 26 16 µ -chroomonas sp. 26 13 13

• 39 26 103 26 39 39 13 26 26 26 39 13 26 \ 13 13 Cryptomonas sp. 65 142 39 26 13 90 65 39 39 116 52 90 13 13 103 39 26 39 116 90 90 13 142 52 00 0

15 µ Cryptophyte 26 90 13 52 39 26 26 13 26 26 13 39 39 13 52 26 Bacillariophyta Chaetoceros sp. 2934 2908 1965 2081 1810 2585 4304 3878 2495 2443 2133 1487 658 2702 3529 2572 2223 2068 2081 3219 2391 2689 2482 1978 1693 530 Skeletonema 1450 2546 672 205 203 418 2689 2792 2908 1939 118 176 40 costatum 1125 1965 840 177 180 336 2999 1965 2779 2094 126 162 64 Rhizosolenia 8 1 4 6 6 2 delicatulum 1 4 7 5 5 2 Cyclotella 39 13 26 52 13 13 meneghiniana 13 26 52 13 26 13 Nitzschia 13 13 13 kiltzinginana 26 13

• Table B3 (continued)

Stations INTAKE INTAKE CANAL CANAL DISCHARGE Organisms DWS INTAKE HPS HPW3 HPW2 HPWl UP DOWN CANAL DISCHARGE CBE CBC JI Nitzschia 16 4 36 48 29 16 2 2 2 4 10 44 35 vermicularis 20 2 48 38 50 14 2 1 2 4 8 40 36 Asterionella 8 47 10 8 66 55 55 22 japonica 4 42 10 3 27 30 47 26 Asterionella 4 10 2 6 3 6 2 formosa 3 4 2 2 10 3 7 Amphiprora sp. 1 2 6 4 14 2 1 1 2 1 8 11 2 8 14 8 1 1 1 2 1 2 10 8 00 I-'

e Table B4 James River Phytoplankton 4-13-77 Dominant Organisms (cells per ml, 2 samples per station)° Stations INTAKE INTAKE CANAL CANAL DISCHARGE Organisms- DWS INTAKE HPS HPW3 HPW2 HPWl UP DOWN CANAL DISCHARGE CBE CBC JI Cryptophyta 8 µ Chroomonas sp. 1112 414 284 724 336 465 362 543 414 336 3102 801 336 1318 284 258 620 414 620 905 543 388 284 2327 724 362 Crypt:omonas sp. 207 103 52 207 103 78 26 78 103 310 129 52 284 26 52 78 233 26 155 52 78 284 26 181 00 Bacillariophyta N Melosira 4782 448 540 6256 621 267 924 766 641 556 328 1913 2663 subsalsa 4292 442 606 4705 666 307 822 616 484 392 269 1965 3335 Melosira 164 40 33 313 252 14 84 20 14 5 149 269 ambigua 83 12 52 277 196 4 32 24 39 25 16 85 290 Cyclotella 388 103 103 155 26 78 181 52 207 233 meneghiniana 233 155 "181 129 78 52 129 '129 78 129 155 207 Nitzschia 233 336 78 388 207 310 284 259 284 258 78 181 207 kutzingiana 465 233 388 569 181 259 207 233 336 595 78 233 310 Nitzschia 8 14 2 2 6 13 20 12 17 3 vermicularis 3 15 7 2 10 12 13 18 17 1 Synedra 9 7 33 26 2 4 2 5 13 18 ulna 16 1 12 21 1 1 1 1 16 19 Nitzschia 3 1 14 8 1 3 1 1 1 4 11 longissima 7 5 21 4 1 2 3 5 Asterionella 8 38 9 6 formosa 7 16 23 2 31

e Table BS James River Phytoplankton 5-12-77 Dominant Organisms (cells per ml, 2 samples per station)

Stations INTAKE* INTAKE*

CANAL CANAL DISCHARGE*

Organisms DWS INTAKE HPS HPW3 HPW2 HPWl UP DOWN CANAL DISCHARGE CBE CBC JI Cryptophyta 8 µ Chroomonas sp. 129 362 155 26 207 26 26 78 362 26 103 78 103 181 78 26 258 155 181 207 52 78 78 52

, 16µ Chroomonas sp. 13 26 103 103 26 78 78 26 26 13 155 26 78 103 52 15µ Cryptophyte 103 26 879 129 26 26 284 181 78 155 52 1034 78 284 52 26 00 w

Pyrrophyta Katodinium 26 103 26 52 52 78 26 rotunda tum 26 207 26 155 52 52 78 52 Bacillariophyta Melosira 155 103 879 1396 750 336 388 129 52 1344 698 3904 subsalsa 209 52 1215 1525 646 801 439 103 233 103 2559 905 4292 Skeletonema 323 207 155 724 905 52 155 52 costatum 297 103 181 181 491 103 52 103 78 52 Cyclotella 362 414 595 414 362 517 52 26 129 207 388 155 meneghiniana 297 517 414 259 336 414 129' 129 155 465 129 207 Rhizosolenia 13 52 129 26 26 26 26 minima 52 26 26 26 26 26 26 26 52 78 Nitzschia 336 233 1086 1474 698 569 284 491 310 155 1732 1706 1344 klitzingiana 388 233 1474 1525 801 595 259 181 336 129 1810 2301 1293

• Canal samples taken 5-13-77

e -I Table B6 James River Phytoplankton 6-13-77 Dominant Organisms (cells per ml, 2 samples per station)

Stations INTAKE INTAKE CANAL CANAL DISCHARGE Organisms DWS INTAKE HPS HPW3 HPW2 HPWl UP DOWN CANAL DISCHARGE CBE . CBC JI Cryptophyta 8 µ Chroornonas sp. 168 491 297 569 879 207 569 620 336 336 1435 517 711 220 233 233 452 789 181 362 414 414 336 1461 439 957 16µ Chroomonas sp. 39 103 103 129 323 13 181 78 26 129 90 155 78 39 103 155 103 271 142 233 26 78 103 271 142 155 15 µ*. Cryptophyte 52 13 116 13 65 13 116 13 52 co Pyrrophyta ~

Katodinium 52 65 233 142 26' 78 207 65 39 rotunda turn 26 233 142 26 52 116 39 155 Bacillariophyta Melosira 284 103 155 103 26 271 52 181 194 52 subsalsa 245 155 129 155 52 103 52 284 26 129 Skeletonema 65 52 52 52 52 13 52 costaturn 39 52 78 52 Cyclotelia 362 52 13 13 26 26 13 26 meneghiniana 207 78 26 52 39 26 Rhizosolenia 65 78 78 168 26 26 142 13 39 minima 52 52 26 65 39 142 26 155 65 26 Nitzschia 13 129 103 52 39 39 78 26 52 52 155 52 220 kutzingiana 13 129 65 90 39 52 52 103 52 168 26 142

• Table B6 (continued)

Stations INTAKE INTAKE CANAL CANAL DISCHARGE Organisms DWS INTAKE RPS HPW3 HPW2 HPWl UP DOWN CANAL DISCHARGE CBE CBC JI Chlorophyta Pyraminonas sp. 233 26 336 259 129 155 52 78 26 78 220 207 220 103 78 478 168 52 155 52 26 129 142. 142 116 Ankistrodesmus sp. 103 26 26 194 78 13 52 271 116 233 90 26 129 26 52 26 26 233 103 142 Micro flagellates 103 103 103 142 13 284 362 569 26 155 78 13 3µFlagellate 142 103 26 116 13 103 595 414 414 26 220 103 26 0::,

\Jl

• Table B7 James River Phytoplankton 7-12-77 Dominant Organisms (cells per ml, 2 samples per station)

Stations Organisms DWS INTAKE HPS HPW3 HPW2 HPWl DISCHARGE CBE CBC JI Cryptophyta 8 µ Chroomonas sp. 957 595 543 879 1357 595 284 1293 375 1926 633 336 543 776 1202 543 465 1086 349 1783 16'µ. Chroomonas sp. 271 207 90 310 711 207 103 181 13 310 207 233 116 414 608 220 52 284 52 297 Pyrrophyta 00 Katodinium 65 129 78 491 776 129 78 129 13 517 °"

rotunda tum 39 52 26 439 840 103 78 39 13 724 Bacillariophyta Leptocylindrus 801 155 52 26 168 26 103 39 39 minimus 698 259 90 52 142 155 220 13 8 Chaetoceros sp. 284 129 258 71 52 39 90 271 65 233 52 129 49 116 26 181 103 39 26 Skeletonema 5 23i 82 88 26 100 134 138 235 costatum 7 40 117 22 137 30 152 132 307 Cyclotella 13 26 26 26 39 65 26 13

_ meneghiniana 26 78 78 52 78 52 Rhizosolenia 78 26 103 26 39 26 39 minima p 13 90 26 103 65 13 Nitzschia 65 26 13 kiitzingiana 26 26 26 13 39

• Table B7 {continued)

Stations Organisms DWS INTAKE HPS HPW3 HPW2 HPWl DISCHAR,GE CBE CBC ,JX Nitzschia 1 9 1 1 2 2 7 1 3 2 longissima 2 6 2 2 3 1 1 2 2 1 Gyrosigma sp. 11 1 1 1 2 4 2 3 3 1 4 1 1 Microflagellates 3 Jl flagellate 116 52 52 26 116 13 13 CX>

-..J

Table B8 James River Phytoplankton 7-21-77 Dominant Organisms (cells per ml, 2 samples per station)

Stations Intake Intake Canal Canal Discharge Organi~ms Intake Up Down Canal Discharge Cryptophyta 8 µ Chroomonas sp. 465 284 181 258 336 414 336 310 284 233

16. µ Chroomonas sp. 78 26 26 52 78 103 103 Pyrrophyta Katodinium 181 181 129 129 207 rotunda tum 284 155 26 103 52 CXl CXl Bacillariophyta Leptocylindrus 26 129 52 78 minimus 52 129 129 Chaetoceros sp. 517 155 595 258 52 78 491 155 26 52 Skeletonema 78 115 98 64 92 costatum 96 163 80 110 91 Cyclotella 78 52 52 meneghiniana 26 103 Rhizosolenia 26 minima 78 Nitzschia 181 259 517 465 181 longissima 258 155 543 595 259 Gyrosigma sp. 11 13 14 12 7 11 13 8 13 6

e Table.B9 James River Phytoplanktqn 8.,.-16.,.-77 Dominant Organisms (cells per ml, 2 samples per i;;tat::i.onl Station$

INTAKE lNTAKE CANAL CANAL DlSCHAR.GE Organisms DWS lNTAKE RPS HPW3 HPW2 HJ>Wl UP DO~ C,ANAL DJSCHAR.GE CBE CBC Jl Cryptophyta 8 µ Chroomonas sp. 840 1008 491 1396 905 646 931 776 233 26 517 569 1318 1021 724 362 1629 827 827 620 724 233 26 62Q 569 1215 16' µ Chroomonas sp. 78 103 78 103 103 78 52 52 103 78 284 52 103 103 78 78 129 181 52 233 Pyrrophyta Katodinium 52 129 78 233 388 620 181 207 258 78 388 ~

rotunda tum 246 155 78 284 155 465 207 103 284 129 543 Bacillariophyta Skeletonema 83 84 19 16 51 90 86 96 41 64 129 113 costatum 23 73 12 96 59 46 95 42 105 101 46 56. 130 Cyclotella 26 78 52 26 26 26 26 78 207 103 78 52 meneghiniana 39 52 78 52 103 78 78 181 78 78 52 52 Chaetoceros sp. 31 13 14 17 18 15 7 9 24 8 11 14 40 7 18 15 17 41 8 33 40 27 17 46 40 62 Leptoc::t:lindrus 39 129 103 103 78 52 52 103 minimus 65 52 233 26 52 129 52 129 52 52 Rhizosolenia 78 78 103 52 103 103 78 52 284 181 129 minima 129 52 129 52 181 26 52 207 181 103 155 Gyrosigma 58 460 228 227 213 233 298 248 245 345 118 249_ 9.0 beaufortianum 65 470 221 218 213 217 305 264 236 349. 114 283 69

e Table B9 (continued)

Stations INTAKE INTAKE CANAL CANAL DISCHARGE Organisms . DWS INTAKE HPS HPW3 HPW2 HPWl UP DOWN CANAL DISCHARGE CBE CBC JI Nitzschia 4 24 20 15 13 32 61 79 88 56 33 29 19 longissima 8 24 14 22 13 39 69 49 59 58 20 30 19 Chlorophyta Pyramimonas sp. 65 155 207 181 155 259 52 52 129 129 26 155 129 52 26 181 103 78 233 52 78 78 78 129 129 Microflagellates 3 µ Flagellate 78 78 52 26 569 52 26 78 52 78 194 26 52 78 26 78 78 698 26 78 52 26 26

\D 0

Table BIO .

James River Phytoplankton 9-6-77 Dominant Organisms (cells per ml, 2 samples per station)

Stations INTAKE INTAKE CANAL CANAL DISCHARGE Organisms DWS INTAKE RPS HPW3 HPW2 HPWl UP DOWN CANAL DISCHARGE CBE CBC JI Cryptophyta 8 µ Chroomonas sp. 452 595 620 1189 1370 595 698 698 439 233 491 1448 1189 530 957 672 1293 1189 646 672 698 414 233 595 1810 1215 16µ Chroomonas sp. 52 78 78 233 78 103 78 52 26 233 233 284 52 78 78 259 78 78 52 26 155 284 181 Cryptomonas sp. 103 103 26 155 155 207 78 388 181 103 103 181 26 103 26 181 129 26 ......

I.O Pyrrophyta Katodinium 129 259 103 336 517 129 284 103 26 362 465 491 rotunda tum 142 259 284 491 646 181 233 52 155 801 388 Bacillariophyta Leptocylindrus 427 129 491 155 207 233 233 284 103 233 129 155 129 minimus 297 207 284 233 233 336 310 155 78 284 .52 207 129 Rhizosolenia 220 52 336 310 362 465 78 52 52 207 543 336 minima 142 52 310 336 388 284 26 26 26 207 569 284 Cyclotella 129 233 129 26 103 78 414 155 207 52 52 207 meneghiniana 90 181 103 26 129 78 181 155 52 155 26 155 Skeletonema 36 55 30 14 43 33 24 22 33 20 27 146 costatum 48 44 29 58 55 82 73 15 20 14 110 Nitzschia 26 181 336 259 155 155 439 439 776 414 181 52 longissima 233 259 155 181 129 181 362 543 517 284 181 26

e Table BlO (continued)

Stations INTAKE INTAKE CANAL CANAL DISCHARGE Organisms DWS Intake HP$ HPW3 HPW2 HPWl UP DOWN CANAL DISCHARGE CBE CBC JI Gyro sigma 111 834 363 448 317 101 1057 940 738 411 2 78 10 beaufortianum 102 946 405 362 277 102 1075 786 602 395 6 69 21 Gyrosigma sp~ 9 17 52 11 6 3 8 4 6 1 4 3 20 44 4 4 7 5 10 2 4 Micro flagellates 3µFlagellates 78 78 26 233 181 52 52 26 52 52 155 362 26 129 52 259 233 103 52 26 52 26 129 233 Chlorophyta 310 336 323 26 103 414 259 698 26 26 26 181 620

. Pyramimonas sp. 620 427 155 78 284 129 517 155 52 155 78 646 414 I.O N

e e e Table Bll James River Phytoplankton 11-9-77 Dominant Organisms (cells per ml, 2 samples per station)

Stations Intake* Intake Canal Canal Discharge Organisms DWS Intake RPS HPW3 HPW2 HPWl Up Down Canal Discharge CBE CBC JI Cryptophyta 8 µ Chroomonas sp. 381 259 220 142 246 78 246 246 246 181 246 259 259 414 336 349 233 103 103 310 181 246 271 310 246 168 16 µ Chroomonas sp. 110 207 103 90 52 39 78 65 103 52 181 155 116 175 155 90 220 65 78 155 103 52 26 103 116 52 Pyrrophyta Katodinium 78 90 26 39 13 168 65 103 26 78 90 26 rotunda tum 19 78 90 103 26 26 90 65 52 26 65 194 26 I.O w

Bacillariophyta Skeletonema 3 42 36 55 21 65 26 11 56 102 90 costatum 14 25 27 15 45 22 4 15 24 18 97 96 Nitzschia 6 65 65 13 52 39 39 39 26 39 13 13 longissima 6 90 52 26 39 52 26 39 13 52 13 26 Gyrosigma ~p. 2 2 1 2 2 4 2 1 5 2 1 1 1 3 2 1 1 2 2 1 Amphiprora sp. 6 15 2 4 9 8 5 11 1 6 15 5 1 3 11 6 4 9 1 Chlorophyta Pyramimonas sp. 19 13 26 26 26 13 52 13 32 26 13 26 13 13 65 13 Micro flagellates 3 µ flagellate 52 13 116 13 65 116 26 39 13 65 39 .13 58 90 52 39 52 13 103 155 39 13 129 39 13

94 Table Bl2 e(Numbers of organisms James River Zooplankton; February 23, 1977 per 100 liters, surface samples, two samples per station)

• Stations Organisms DWS Intake HPS HPW3 HPW2 HPWl Copepod. 1 33.1 30.3 56.3 449.6 95.3 164.0 nauplii 2* 16.9 33.4 65.7 357.8 137.7 171.9

- 25.0 X 31. 9 61. 0 403.7 116.5 167.9 s 11.5 2.2 6.6 64.9 30.0 5.5 s-X 8.1 1.6 4.7 45.9 21.2 3.9 Polychaete 1 91.1 112.2 59.2 15.0 47.1 99.5 larvae 2 57.1 178.3 59.8 11. 7 51.0 55.3 x 74.1 145.3 59.5 13.3 49.0 77.4 s 24.0 46.7 0.4 2.3 2.8 31.2 Sx 17.0 33.0 0.3 1.6 2.0 22.1 Harpacticaid 1 1.2 1.8 7.9 2.2 0.0 8.1 copepods 2 1.1 18.6 10.3 1.5 1. 7

• 2. 9 X 1.1 10.2 9.1 1.8 0.8 5.5 s 0.1 11. 9 1. 7 0.5 1.2 3.6 Sx 0.1 8.4 1.2 0.4 0.8 2.6 Eu;:ytemora 1 2.4 3.6 13.0 172.0 38.8 44.4 esp. 2 4.2 0.0 19.9 128.5 62.9 59.7 x 3.3 1.8 16.5 150.3 50.9 52.0 s 1.3 2.5

• 4. 9 30.8 17.0 10.8 s-x; 0.9 1.8 3.5 21.8 12.0 7. 7.

Rotifers 1 26.0 92.6 26.7 13.5 35.3 53.8 2 15.9 81. 7 20;7 13.1 22.1 75.7 x 21.0 87.2 23.7 13.3 28.7 64.8 s 7.2 7.7 4.3 0.2 9.3 15.5 s-X 5.1 5.4 3.0 0.2 6.6 11. 0 Bosmina 1 2.4 1.4 0.0 sp. 2 0.0 0.0 2.9 X 1.2 0.7 1.5 s . 1. 7 1. 0 2.1 s-X 1.2 0.7 1. 5 Cyclopoid 1 1.2 3.6 6.5 9.0 9.4 13.4 copepods 2 5.3 .3. 7 9.6 7.3 10.2 29.1 X 3.2 3.6 8.0 8.1 9.8 21.3 s 2.9 0.1 2.2 1.2 0.6 11.1 s-X 2.0 0.1 1.5 0.8 0.4 7.8

95 Table Bl2 (continued)

-Organisms Barnacle 1 DWS 0.0 Intake 1.8 Stations RPS 2.2 HPW3 HPW2 HPWl 6.7 nauplii 2 1.1 0.0 2.2 18.9 X 0.5 0.9 2.2 12.8 s 0.7 1.3 0.0 8.6 s-X 0.5 0.9 0.0 6.1 Acartia 1 3.6 1.2 2.7 sp. 2 2.2 a.a 1. 5 X 2.9 0.6 2.1 s 1. 0 0.8 0.9 s-X 0.7 0.6 0.6

96 Table Bl2 (continued)

Stations Organisms Discharge CBE CBC J. I. I. C.D. D.C.

fopepod 1 45.1. 51.6 141.2 778.6 21.1 14.1 nauplii 2 55.5 113.6 104.3 573.7 5.3 28.2 X 50.3 82.6 122.8 "676.1 13.2 21.1 s 7.3 43.8 26.2 144.9 11.2 10.0 s-X 5.2 31.0 18.5 102.4 7.9 7.0 Polychaete 1 119.2 15.9 35.7 4.6 22.9 31. 7 larvae 2 233.2 38.3 25.7 4.1 8.8 59.9

- 176.2 X 27.1 30.7 4.3 15.8 45.8 s 80.6 15.9 7.1 0.4 10.0 19. 9 s-X "57.0 11.2 5.0 0.3 7.0 14.1 Harpacticoid 1 19.3 4.0 4.9 3.1 28.2 3.5 copepods 2 22.2 4.4 0.0 1.3 8.8 3.5 x 20.8 4 ..2 2.4 2.2 18.5 3.5 s 2.0 0.3 3.4 1.2 13.7 0.0 s-X 1.4 0.2 2.4 0.9 9.7 0.0 Eurytemora 1 0.0 67.5 68.2 293.5 0.0 5.3 sp. 2 11.1 100.3 62.6 240.8 1.8 10.6 x 5.5 83.9 65.4 267.2 0.9 7.9 s 7.8 23.2 4.0 37.2 1.2 3.7 s-X 5.5 16.4 2.8 26.3 0.9 2.6

.tifers 1 35.4 18.5 45.5 109.7 1.8 0.0 2 37.0 54.6 28.9 100.1 0.0 1.8 x 36.2 36.5 37.2 104.9 0.9 0.9 s 1.1 25.5 11. 7 6.7 1.2 1.2 s-X 0.8 18.0 8.3 4.8 0.9 0.9 BcSsmina 1 1.3 3.2 1.5 sp. 2 0.0 0.0 1. 3 X 0.7 1.6 1.4 s 0.9 2.3 0.1 s-X 0.7 1.6 0.1 Cyclopoid 1 3.2 7.9 32.5 41. 7 7.0 12.3 copepods 2 7.4 S.9 14.4 27.1 1.8 1.8 X 5.3 6.9 23.5 34.4 4.4 7.0 s 3.0 1.4 12.7 10.4 3.7 7.5 s-X 2.1 1.0 9.0 7.3 2.6 5.3

97 Table Bl2 (continued)

Stations Organisms Discharge CBE CBC J. I. I.C. D. D.C.

~arnacle 1 9.7 1. 3 3.2 0.0 3.5 3.5 nauplii 2 7.4 0.0 0.0 2.7 1.8 7.0 X 8.5 *o. 1 1.6 1.4 2.6 5.3 s 1.6 0.9 2.3 1. 9 1.2 2.5 s-X 1.1 0.7 1.6 1.3 0.9 1. 8 Acartia 1 1. 3 0.0 4.6 sp. 2 1.5 1.6 1.3 x 1.4 0.8 3.0 s 0.1 1. 3 2.3 s-X 0.1 0.8 1.6 e

98 Table B13 Jam.es River Zooplankton April 13, 1977

.umbers of organisms per 100 liters, surface samples, two samples per station)

Stations.

Organisms DWS Intake HPS HPW3 HPW2 HPWl Copepod 1 156.9 1031. 5 416.9 156.6 267.7 763.5 nauplii 2 121. 8

• 1471. 7 267.8 292.2 541.2 631.8 x 139.3 1251.6 342.4 224.4 404.4 697.6 s 24.8 311.3 105.5 95.8 193.4 93.1 s-X 17.5 220.1 74.6 67.8 136~8 65.9 Bosmina sp. 1 14.9 47.8 30.5 22.4 23.8 8.3 2 19.1 63.6 27.1 5.5 70.6 2.3 x 17.0 55 . 7 28.8 13.9 47 .2 5.3 s 3.0 11.2 2.4 11.9 33.1 4.3 s-X 2.1 7.9 1. 7 8.4 23.4 3.0 Harpacticoid 1 6.0 35.8 57.6 4.5 5.9 8.3 copepods 2 1. 7 8.5 74.6 16.5 23.5 17.3 x 3.9 22.2 66.1 10.5 14.7 12.8 s 3.0 19.3 12.0 8.5 12.4 6.3 s-X 2.1 13.7 8.5 6.0 8.8 4.5 eEurytemora sp .. 1 37.3 23.9 27.1 13.4 29.7 8.3 2 31.3 17.0 23.7 22.0 29.4 21. 6 x 34.3 20.4 25.4 17.7 29.6 15.0 s 4.3 4.9 2.4 6.1 0.2 9.4 s-X 3.0 3.5 1. 7 4.3 0.2 6.6 Rotifers 1 16.4 55.8 13.6 44.8 23.8 25.0 2 5.2 453.8 13.6 66.1 52.9 8.6 x 10.8 254.8 13.6 55.5 38.4 16.8 s 7.9 281.5 0.0 15.1 20.6 11.6 s-X 5.6 199.0 0.0 10.7 14.6 8.2 Cyclopoid 1 11. 9 31. 9 27.1 22.4 65.4 33.4 copepods 2 17.4 101.8 50.8 33.1 82.3 86.5 x 14. 7 66.8 39.0 27.7 73.9 60.0 s 3.8 49.4 16.8 7.6 12.0 37.6 s-X 2.7 35.0 11. 9 5.3 8.5 26.6 Polychaete 1 4.0 5.9 0.0 larvae 2 x

0.0 2.0

- 5.8 5.9 2.3 1.1 s 2.8 0.1 1.6 s- 2.0 0.0 1.1 X

99

. Table Bl3 (continued)

Stations Organisms DWS Intake HPS HPW3 HPW2 HPWl Barnacle 1 nauplii 2 x

s ,_

s-x

100 Tabl~ B13 (continued)

Stations Organisms Discharge CBE CBC J. I. I.C.D. I.C.U. D.C.

Copepod 1 423.1 393.7 238.1 210.7 327.6 581.2 361. 0 nauplii 2 258.7 306.9 230.9 307.5 225.4 243.0 366.3 x 340.9 350.3 234.5 259.1 276.5 412.1 363.7 s 116.3 61.4 5.1 68.5 72.2 239.1 3.7 s- 82.2 43.4 3.6 48.4 51.1 169.1 2.6 X

Bosmina sp. 1 17.7 4.2 11. 9 6.6 24.7 15.8 1. 8 2 12.3 16.4 26.8 14.6 3.5 12.3 0.0 jc 15.0 10.3 19.4 10.6 14.1 14.1 0.9 s 3.8 8.6 10.6 5.7 14.9 2.5 1. 2 s- 2.7 6.1 7.5 4.0 10.6 1. 8 0.9 X

Harpacticoid 1 35.5 8.4 0.0 6.6 21.1 7.0 24.7 copepods 2 15.4 o.o 5.4 22.0 29.9 10.6 8.8 x 25.5 4.2 2.7 14.3 25.5 8.8 16.7 s 14.2 5.9 3.8 10.9 6.2 2.-5 11. 2 s- 10.0 4.2 2.7 7.7 4.4 1. 8 7.9 X

1 8.9 47.6 13.2 3.5 8.8 8.8

~,::*temora 37.6 29.3 10.6 26.4 8.8 2 3.1 x 6.0 42.6 21.2 7.0 17.6 8.8 s 4.1 7.1 11.4 5.0 12.4 o.o s- 2.9 5.0 8.1 3.5 8.8 0.0 X

Rotifers 1 82.8 4.2 23.8 59.3 42.3 15.8 54.6 2 24.6 0.0 53.7 22.0 47.5 19.4 1. 8 x 53.7 2.1 38.7 40.6 44.9 17.6 28.2 s 41.2 3.0 21. l 26.4 3.7 2.5 37.4 s- 29.1 2.1 14.9 18.6 2.6 1.8 26.4 X

Cyclopoid 1 14.8 12.6 35.7 6.6 8.8 15.8 5.3 copepods 2 15.4 4.1 5.4 43.9 3.5 1.8 3.5 x 15.1 8.3 20.5 25.3 6.2 8.8 4.4 s 0.4 6.0 21. 5 26.4 3.7 10.0 1. 2 s- 0.3 4.2 15.2 18.7 2.6 7.0 0.9 X

Polychaete 1 8.9 3.5 3.5 1.8

. larvae 2 6.2 5.3 1.8 8.8 X 7.5 4.4 2.6 5.3 s 1. 9 1. 2 1. 2 5.0 s- 1.4 0.9 0.9 3.5 X

101 Table Bl3 (continued)

Stations Organisms Discharge CBE CBC J. I. I.C.D. I.C.U. D.C.

- Barnacle nauplii 1

2 X

s 298.8 166.3 232.6 93.7 19.4 29.9 24.7 7.5 19.4 7.0 13.2 8.7 59.9 56.4 58.1 2.5 s- 66.3 ' - 5.3 6.2 1.8

102

- Table Bl4 James River Zooplankton; May 12, 1977 (Numbers of organisms per 100 liters, surface samples, two samples per station)

Stations Organisms DWS Intake HPS HPW3 HPW2 HPWl Copepod 1 608.1 655.9 477.0 . Q095.l 607.3 1658.8 nauplii 2 728.1 474.5 336.8 .1108. 8 447.6 663.7 x 668.1 565.2 406.9 1601. 9 527.5 1161. 2 s 84.8 128.3 99.1 697.4 113.0 703.6 s-X 60.0 90.7 70.1 493.2 79.9 497.5 Polychaete 1 10.4 81.2 11.8 . 257 .2 16.2 26.9 larvae 2 27.1 82.2 6.7 114.0 9.1 23.2 X 18.8 81. 7 9.2 185.6 12.7 25.0 s 11.8 0.7 3.6 101.3 5.0 2.6 s-X 8.3 0.5 2.6 71.6 3.5 1. 8 Barnacle 1 651. 7 999.0 279.9 27.9 86.4 1181. 9.

nauplii 2 457.2 623.2 273.5 18.5 54.8 397.9 X 554.5 811.1 276.7 '23.2 70.6 789.9 s 137.5 265.7 4.5 6.6 22.3 554.4 s-X 97.2 187.9 3.2 4.7 15.8 392.0 e Harpac t ico id copepods 1

2

1. 7 16.1 27.1 12.6 106.4 43.4 52.7 6.2 56.7 54.8 107.4 32.1 X 8.9 19.9 74.9 29.4 55.7 69.8 s 10.1 10.2 44.6 32.9 1.3 53.3 s- X 7.2 7.2 31.5 23.3 0.9 37.7 Eurytemora sp. 1 94.1 201.6 118.3 371.9 170.0 221.6 2 213.2 237.3 153.4 234.1 127.9 137.4 X 153.6 219.4 135.8 303.0 149.0 179.5 s 84.2 25.2 24.8 97.5 29.8 59.6 s-X 59.6 17.8 17.6 68.9 21.1 42.1 Pelecypod 1 90.6 240.7 19.7 371.9 56.7 73.9 larvae 2 29.5 208.8 50.0 323.4 94.4

• 33. 9 X 60.1 224.8 34.9 347.6 75.5 53.9 s 43.2 22.6 21.4 34.3 26.7 28.3 s-X 30.6 15.9 15.2 24.3 18.9 20.0 Acartia sp. 1 38.3 652.9 25.0 52.7 35.1 13.4 2 59.0 313.2 26.7 21.6 3.0 0.0 X 48.7 483.1 25.8 37.1 19.1 6.7 s 14.6 240.2 1.2 22.0 22.7 9.5 s- X 10.3 169.9 0.8 15.6 16.0 6.7

103 Table Bl4 (continued)

Stations Organisms DWS Intake HPS HPW3 HPW2 HPWl

-Rotifers 1 17.4 0.0 17.1 27.9 21. 6 47.0 2 0.0 6.3 10.0 55.4 57.8 10.7 x 8.7 3.2 13.5 41. 7 39.7 28.9 s 12.3 4.5 5.0 19.5 25.6 25.7 s-X 8.7 3.2 3.5 13.8 18.1 18.1 Cyclopoid 1 0.0 3.0 - - - 6.7 copepods 2 1.3 0.0 - - - 1.8 X 0.7 1.5 - - - 4.2 s 0.9 2.1 - - - ~

3.5 s-X 0.7 1.5 - - - 2.5 Bosmina sp. 1 - - 21.0 - 18.9 6.7 2 - - 10.0 - 15.2 7.1 X - - 15.5 - 17.1 6.9 s - - 7.8 - 2.6 0.3 s-X - - 5.5 - 1. 8 0.2 Amphipods 1 2

X s

s-X e

104 Table Bl4 (continued)

Stations Organisms Discharge CBE CBC J. I.. I.C.D. r.c.u. D.C.

9pepod 1 160.6 154.1 483.5 894.2 297.6 598.8 195.5 nauplii 2 204.3 291.4 753.8 710.8 86.3 405.1 40.5 X 182.4 222.7 618.6 802.5 192.0 501. 9 118.0 s 30.9 97.1 191.1 129.7 149.4 137.0 109.6 s-X 21.9 68.6 135.1 91. 7 105.7 96.9 77.5 Polychaete 1 27.2 3.1 3.1 9.2 29.9 52.8 40.5 larvae 2 28.4 0.0 2.8 0.0 7.0 24.7 8.8 X 27.8 1.6 3.0 4.6 18.5 38.7 24.7 s 0.9 2.2 0.2 6.5 16.2 19.9 22.4 s-X 0.6 1.6 0.1 4.6 11.4 14.1 15.8 Barnacle 1 926.3 25.2 6.2 15.3 269.5 618.2 623.5 nauplii 2 1324.0 83.2

• 16. 9 2.9 317.0 491.4 280.0 X 1125.1 54.2 11.6 9.1 293.2 554.8 451. 7 s 281.2 41.1 7.6 8.8 33.6 89.7 242.8 s-X 198.8 29.0 5.4 6.2 23.8 63.4 171. 7 Harpacticoid 1 46.9 53.5 40.3 165.4 15.8 15.8 24.7 copepods 2 44.0 117.9 42.3 166.9 26.4 17.6 21.1 x 45.4 85.7 41.3 166.1 21.1 16.7 22.9 s 2.1 45.6 1.5 1.1 7.5 1.2 2.5 s- 1.5 32.2 1. 0 0.8 5.3 0.9 1. 8

-~

X Eurytemora 1 56.8 37.7 58.9 174.5 8.8 10.6 14.1 2 31. 0 76.3 45.2 126.6 14.1 19.4 7.0

• x 43.9 57.0 52.0 150.6 11.4 15.0 10.6 s 18.2 27.3 9.7 33.9 3.7 6.2 5.0 s-X 12.9 19.3 6.9 24.0 2.6 4.4 3.5 Pelecypod 1 46.9 - 43.4 110.2 - 14.1 10.6 larvae 2 69.8 - 45.2 63.3 - 26.4 3.5 X 58.4 - 44.3 86.8 - 20.3 7.0 s 16.2 - 1. 3 33.2 - 8.7 5.0 s-X 11.4 - 0.9 23.5 - 6.2 3.5 Acartia sp. 1 121. 0 3 .. 1 6.2 3.1 826.0 149.7 51.1 2 103.4 0.0 0.0 0.0 891.2 329.3 15 .8

• X 112.2 1.6 3.1 1.5 858.6 239.5 33.5 s 12.4 2.2 4.4 2.2 46.1. 127.0 24.9 s- 8.8 1.6 3.1 1.5 32.6 89.8 *11.6 X

Rotifers 1 - 56.6 31.0 315.4 - 1.8 2 - 9*0. 2 8.5 256.1 - 7.0 X - 73.4 19.7 285.8 - 4.4 s - 23.7 15.9 41.9 - 3.7 s-X - 16. 8 11.3 29.6 - 2.6

105 Table Bl4 (continued) stat.ions Organisms Discharge CBE. CBC J. I. I.C.D. r.c.u. D.C.

cJliopoid 1 6.3 3.1 0.0 Copepods 2- 17.3 2.8 5.8 X 11.8 3.0 2.9 s 7.8 0.2 4.1 s-X 5.5 0.1 2.9 -1 Bosmina sp. 1 0.0 9.4 24.8 49.0 2 5.2 24.3 28.2 51.8 X 2.6 16.9 26.5 50.4 s 3.7 10.5 2.4 2.0 s-X 2.6 7.4 1. 7 1.4 Amphipods 1 5.3 2 3.5 X 4.4 s 1.2 sx 0.9

106 Table Bl5.

James River Zooplankton June 13, 1977 (Numbers of organisms per 100 liters, surface samples, two samples per station)

Stations Organisms DWS Intake* HPS HPW3 HPW2 HPWl Copepod 1 1220.5 673.2 393.7 531. 9 1093.4 824.0 nauplii 2 782.0 1258.4 531.2 616.3 1025.7 1827.7 X 1001. 2 965.8 462.5 574.1 1059.6 1325.4 s 310.0 413.7 97.2 59.6 47.8 710.4 s-X 219.2 292.6 68.7 42.2 33.8 502.4 Acartia sp. 1 187.3 16.6 4.3 22.3 4.9 6.2 2 166.7 8.6 27.7 11.6 12.4 109.8 x 177.0 12.6 16.0 16.9 8.6 58.0 s 14.5 5.7 16.6 7.6 5.3 73.2 s-X 10.3 4.0 11. 7 5.4 3.8 51. 8 Barnacle 1 68.0 138.5 325.6 80.8 14.6 224.4 nauplii 2 53.0 157.9 274.4 57.9 12.4 148.3 X 60.5 148.2 300.0 69.3 13.5 186.4 s 10.6 13.7 36.2 16.2 1.5 53.8 s-X 7.5 9.7 25.6 11.4 1.1 38.0 Harpacticoid 1 1. 2 4.2 6.4 2.8 0.0 copepods 2 3.0 1. 7 2.5 5.8 17.8 x 2.1 2.9 4.4 4.3 8.9 s 1. 3 1. 7 2.7 2.1 12.6 e s-X 0.9 1. 2 1. 9 1.5 . 8.9 Eurytemora 1 6.0 13.8 14.9 5.6 4.9 56.1 sp. 2 4.5 . 8.6 17.6 2.9 3.1 77.1 X 5.3 11.

1 2 16.3 4.2 4.0 66.6 s 1. 0 3. 7 1. 9 1.9 1.-2 14.9 s-X 0.7 2.6 1.4 1.3 0.9 10.5 1Polychaete 1 13.1 5.5 2.1 8.3 9.7 15.6 larvae 2 22.7 3.4 5.0 17.4 37.3 41. 5 X 17.9 4.5 3.6 12.9 23.5 28.6 s 6.8 1.5 2.0 6.4 19.5 18.3 s-X 4.8 1. 0 1.4 4.5 13.8 13.0 Pelecypod 1 0.0 4.3 66.8 12.1 34.3 larvae 2 13.7 35.2 57.9 12.4 86.0 X -6.9 19.8 62.4 12.3 60.2 s 9.7 21.9 6.3 0.2 36.6 s-X 6.9 15.5 4.5 0.1 25.9 Rotifers 1 11.1 106.9 24.9 2 20.2 282.9 11.9 x 15.7 194.9 18.4 s 6.4 124.4 9:2 s-X 4.6 88.0 6.5

107 Table Bl5 (continued)

Stations

..Organisms DWS Intake RPS HPW3 HPW2 HPWl

-Gastropod 1 5.1 - - - 24.9 larvae 2 0.0 - - - 47.5 x 2.6 - - - 36.2 s 3.6 - - - 15.9 s-X 2.6 - - - 11.3 Cyclopoid 1 0.0 copepods 2 3.0 x 1. 5 s 2.1 s- - . 1. 5 X

Bosmina sp. 1 2

X s

s-X Amphipods 1 2

X s

s-X e

108 Table

• B15 * (continued)

. James River Zooplartkton June 13, 1977 (Numbers of organisms per 100 liters, surface samples, two samples per station)

Stations**

.lanisms Discharge CBE CBC J. I. I.C.D .. r.c.u. D.C.

Copepod 1 328.1 652.4 1893.8 540.7 153.2 109.2 68.7

. nauplii

• 2 204.1 848.1 739.0 488.6 331.2 313.5 68.7 X 266.1 750.3 1316.4 514.6 242.2 211.4 68.7 s 87.6 138.4 816.5 36.8 125.8 144.5 0.0 s- 62.0 97.9 577.4 26.1 88.9 102.2 0.0 X

Acartia sp. 1 9.0 41.3 5.6 39.3 77.5 - 29.9 14.1 2 , 22. 7 73.6 0.0 5.4 45.8 38.7 7.0 X 15.8 57.4 2.8 22.3 61.6 34.3 10.6 s 9.7 22.8 3.9 24.0 22.4 6.2 5.0 s- X 6.8 16.1 2.8 17.0 15.8 4.4 3.5 Barnacle 1 229.2 153.3 128.1 - 22.9 15.8 135.6 nauplii 2 121. 0 132.0 15.4 - 40.5 95.1 123.3 X. 175.1 142.6 71. 8 - 31. 7 55.5 129.5 s 76.5 15.0 79.7 - 12.4 56.0 8.7 s- X 54.1 10.6 59.4 - 8.8 39.6 6.2 Harpacticoid 1 4.5 2.0 5.6 - 0.0 8.8 3.5 copepods 2 7.6 8.6 0.0 - 3.5 8.8 0.0 X 6.0 5.3 2.8 - 1. 8 8.8 1. 8 s 2.2 4.7 3.9 - 2.5 0.0 2.5 e s-1 X

1.5 3.3 2.8 - 1. 8 o.o 1. 8 Eurytemora 22.5 15.7 44.6 34.4 15.8 3.5 1. 8 sp. 2 3.8 34.6 15.4 10.7 17.6 7.0 0.0 X 13.1 25.2 30.0 22.6 16.7 5.3 0.9 s 13.2 13.4 20.6 16.7 1. 2 2.5 1. 2 s- X 9.3 9.4 14.6 11. 8 0.9 1. 8 0.9 Polychaete 1 13.5 13.8 22.3 4.9 1. 8 1. 8 3.5 larvae 2 26.5 47.6 10.3 5.4 5.3 0.0 1. 8 X 20.0 30.7 16.3 5.1 3.5 0.9 2.6 s 9.2 23.9 8.5 0.3 2.5 1. 2 1. 2 s- 6.5 16.9 6.0 0.2 1. 8 0.9 0.9 X

Pelecypod 1 0.0 49.1 39.0 39.3 - - 3.5 larvae 2 3.8 30.3 41.1 21.5 - - 3.5 X 1. 9 39.7 40.0 30.4 - - 3.5 s 2.7 13.3 1.5 12.6 - - 0.0 s- X

1. 9 9.4 1.0 8.9 - - 0.0 Rotifers 1 9.0 129.7 167.1 29.5 2 3.8 151.4 92.4 26.8 X. 6.4 140. 6 129.7 28.2 s 3.7 15.4 52.8 1. 9 s-X 2.6 10.9 37.4 1.3 e

109 Table Bl-5 (continued)

Stations Organisms Discharge CBE CBC J. I. I.C.D . I.C ..U. D.C.

. .,.tropod 1 5.9 5.6 larvae 2 10.8 0.0 x 8.4 2.8 s 3.5 3.9 s-X 2.5 2.8 Cyclopoid 1 copepods 2 /

X s

s-X Bosmina sp. 1 15.7 2 8.6 X 12.2 s 5.0 -

s-X 3.5 --

Amphipods 1 o.o 1. 8 2 3.5 3.5 X 1. 8 2.6 s 2.5 1. 2 s-X

1. 8 0.9

110 Table Bl6 James River Zooplankton July 1:2, 1977

~umbers of organisms per 100 liters, surface samples, two samples per station)

Stations Organisms DWS Intake HPS HPW3 HPW2 HPWl Copepod 1 208.9 1277.4 1623.0 2676.2 582.2 1235.7 nauplii 2 145.2 *4398.5 1989.2 2900.3 1649.9 3219.0 X 177.1 2838.0 1806.1 2788.2 1116.1 2227.4 s 45.1 2207.0 259.0 158.5 755.0 1402.4 s-X 31-~9 1560.6 183.1 112.1 533.8 991. 7 Pelecypod 1 9.3 256.0 545.1 866.7 37.6 604.4 larvae 2 3.8 83.0 1319.7 1951. 8 150. 7 2412.7 x 6.6 169.5 932.4 1409.2 94.1 1508. 6 s 3.9 122.3 547.8 767.3 80.0 1278.6 s-X 2.7 86.5 387.3 542.6 56.6 904.1 Acartia sp. 1 67.9 686.5 379.7 400.0 75.1 308.9 2 33.4 268.3 31'7 .1 469.8 226.0 533.3 X 50. 6 477.4 348.4 434.9 150.6 421.1 s \ 24.4 295.8 44.3 49.4 106.7 158.7

.Si.;; 17.2 209.1 31.3 34.9 75.4 112.2 Barnacle lx 12.0 34.9 159.2 133.3 4.7 53.7 nauplii 2 2.6 12.8 317.1 116.4 il.3 133.3 X 7.3 23.8 238.2 124.8 8.0 93.5 s 6.6 15.. 7 111.6 12.0 4.7 56.3 S-X 4.7 11.1 78.9 8.5 3.3 39.8 Polychaete 1 10.6 34.9 85.7 171.4 32.9 147.7 larvae 2 3.8 38.3 80.1 107.6 26.4 114.3 X 7.2 36.6 82.9 139.5 29.6 131. 0 s ' 4.8 2.4 4.0 45.2 4.6 23.6 S-X 3.4 1. 7 2;8 31. 9 3.2 16.7 Eurytemora 1 0.0 11.6 12.2 9.-5 4.7 0.0 sp. 2 2.6 6.4 9.6 8.8 I 0.0 57.1 X 1.3 9.0 10.9 9.2 2.4 28.6 s 1.8 3.7 1.9 0.5 3.3 40.4 S- 1.3 2.6 1.-3 0.4 2.4 28.6 X

Harpacticoid 1 0.0 69.8 36.8 19.0 4.7 80.6 copepods 2 5.1 31.9 41.6 39.5 0.0 63.5 X 2.6 50.9 39.2 29.3 2.4 72.0 s 3.6 26.8 3.5 14.5 3.3 12.1 S-X 2.6 18.9 2.4 10.2 2.4 8.6 Rotifers 1 0.0 18.4 14.3 9.4 2 2.6 16.0 0.0 0.0 X

- 1.3 17.2 7.2 4.7 s 1.8 1. 7 10.1 6.6

's-.x 1.3 1. 2 7.1 4.7

111 Table Bl6 (contir.ued)

Stations w,anisms DWS Intake RPS HPW3 HPW2 HPWl Gastropod 1 0.0 larvae 2 6.6 X 3.3 s 4.7 s- 3.3 x

Decapod 1 0.0 larvae 2 6.4 X 3.2 s 4.5 s-x 3.2 Bosmina sp. 1 2

X s

s-x

112 Table Bl6 (continued) e Stations Organisms Discharge. CBE CBC J. I.

Copepod 1 986.5 1508 .1 2670.5 3919.4 nauplii 2 1692.6 2762.6 4506.6 3359.3 X 1339.5 2135.4 3588.6 3639.3 s 499.3 . 887. 0 1298.3 396.0 si 353.0 627.2 918.0 280.0 Pelecypod 1 156.4 5576.2 1978.2 391.4 larvae 2 158.7 13283.4 3472.7 424.7 X 157.5 9429.8 2725 .. 4 408.1 s 1.6 5449.8 1056.8 23.6 S- 1.1 3853.6 747.2 16.7 X

Acartia sp. 1 216.5 646.3 797.1 121.3 2 327.9 581.3 1631. 6 43.4 X 272.2 613.8 1214.4 82.4

• s 78.8 46.0 590*. l 55.0 Sx

- 55.7 32.5 417.3 38.9

• Barnacle 1 60.2 67.6 0.0 82.7 nauplii 2. 84.6 299.3 34.9 57.9 e J X

s S-72.4 17.3 12.2 183.4 163.8 115.8 17.4

• 24. 7 17.4 70.3 17.5 12.4 X

Polychaete 1 72.2 380.2 58.2 11. o-larvae 2 63.5 270.5 69.8 14.5 X 67.8 325.4 64.0 12.8 s 6.2 77.6 8.2 2.4 s-X 4.4 54.8 . 5 .8 1. 7 Eurytemora sp. 1 564.4 88.2 2 759.1 38.6

/

X 661. 7 63.4 s 137.7 37.1 s-X 97.4 24.8 Harpacticoid 1 25.4 17.4 copepods 2 40.3 4.4 X 32.8 10.9 s 10.6 9.3 s-X 7.5 6.'6 Rotifers 1 12.0 4.2 5.8 5.5 2 10.6 23.0 0.0 9.6 X 11.3 13.6 2.9 7.6

• S 1. 0 13.3 4.1 2.9 s-X 0.7 9.4 2.9 2.1

113 Table Bl6 (continued)

.Stations 9anisrns .. Discharge CBE CBC J. I.

Gastropod 1 - 52.9 larvae 2 - 0.0 i - 26.4 s - 37.4 s-X

- 26.4 Decapod 1 - - 5.8 larvae 2

- - - 0.0 X - - 2.9 s - - 4.1 s-X

- - 2.9 Bo srnina s p . 1 - 71.8 0.0 2 - 0.0 4.4 X - 35.9 2.2 s - 50.8 3.1 s-X

- 35.9 2.2 e

114 Table B17 Surry Zooplankcon Entrainment 7-21-77

'umbers of organisms per 100 liters, surface samples, two samples per station)

Stations Organisms INT DIS ICD ICU DC Copepod nauplii 1 736.7 686. 7

• 2569.8 1241.7 197 ."3 2 1788.2 622.5 2037.9 1421.4 156.8 X 1262.5 654.6 2303.8 1331.6 177.0.

s 743.6 45.4 376.1 127.0 28.6 s- 525.8 32.1 266.0 89.8 20.2 X

• Pelecypod larvae 1 115.1 16.9 12.3 8.8 1.8 2 241.2 7.6 1.8 1.8 0.0 x 178.2 12.2 7.0 5.3 0.9 s 89.1 6.6 7.5 5. 0. 1.2 s_ 63.0 4.6 5.3 3.5 0.9 X

Acartia sp. 1 270.5 123.8 450.9 258.9 156.8 2 688.2 106.3 368.1 382.2 165.6 X 479.4 115.1 409.5 320.6 161.2 s 295.4 12.4 58. 5

• 87.2 6.2 s- 208.9 8.8 41.4 61.6 4.4 X

Barnacle nauplii 1 109~4 287.1 103.9 197.3 89.8 2 194.1 182.2 66.9 170.8 40.5 e \

X s

s-151. 7 59.9 42.4 234.6 74.2 52.4 85.4 26.2 18.5 184.1 18.7 13.2 65.2 34.9 24.7 X

Polychaete larvae 1 34.5 107.0 37.0 72.2 14.1 2 70. 6 38.0 51.1 167.3 42.3 X 52.6 72.5 44.0 119.8 28.2 s 25.5 48.8 10.0 67.3 19.9 s; 18.0 34.5 7.0 47.6 14.1 Eurytemora sp. 1 0.0 73.2 26.4 10.6 31. 7 2 17.6 0.0 8.8 40.5 10.6 X 8.8 36.6 17.6 25.5 21.1 s 12.5 51. 7 12.4 . 21. 2 14.9

-s- 8.8 36.6 8.8 15.0 10.6 X

Harpacticoid 1 11.5 45.0 21.1 8.8 31. 7 copepods 2 23.5 22.8 1.8 10.6 3.5 X 17.5 33.9 11.4 9.7 17.6 s 8.5 15.7 13.7 *l.2 19.9 s-X 6.0 11.1 9.7 0.9 14.1 Rotifers 1 34.5 0.0 1.8 1.8 1.8 2 17.6 15.2 0.0 1.8 0.0 X 26.1 7.6 0.9 1.8 0.9 s 11. 9 10.7 1. 2 0.0 1.2 S- 8.4 7.6 0.9 0.0 0.9 X

115 Table Bl 7 (continued)

Stations anisms INT DIS ICD ICU DC Gastropod larvae 1 - 5.6 0.0 1. 8 1.8 2 - 0.0 1.8 1. 8

• 0. 0 x - 2.8 0.9 1.8 0.9 s - 4.0 1.2 *O.O 1.2 s-X

- 2.8 0.9 0.0 0.9 Decapod larvae 1 - - - 1. 8 1. 8 2 - - - 3.5 1.8 X - - - 2.6 1.8 s - - - 1.2 0.0 s-X

- - - 0.9 0.0 Bosmina sp. 1 - - 3.5 1.8 2 - - 0.0 0.0 x - - 1.8 0.9 s - - 2.5 1. 2 s-X

- - 1.8 0.9 Amphipods 1 - - - 1. 8 1.8 2

- - - - 1.8 3.5 X - - - 1. 8 2.6 s - - - 0.0 1. 2 s-X

- - - 0.0 0.9 e

e

116 Table B18 James*River Zooplankton August 16, 1977 (Numbers of organisms per 100 liters, surface samples, two samples per station)

. Stations 9rgani~ms DWS Intake RPS HPW3 HPW2 HPWl Copepod 1 521.9 2448.2 538.1 921.2 611.4 937.8 nauplii 2 671.3 940.5 555.9 529.9 1350.9 934.9 x 596.6 1694.4 547.0 725.6 981.2 936.4 s 105.7 1066 .1 12.6 . 276. 7 522.9 2.0 S:x 74.7 753.9 8.9 195.6 369.8 1.4 Acartia sp. 1 . 128. 2 354.2 221.0 150.3 180.4 241.8 2

• 235. 7 152.9 256.6 125.4 506.6 90.7 X 181.9 253.6 238.8 137.9 343.5 166.3 s 76.0 142.4 25.1 17.6 230.6 106.8 s-X 53.8 100.6 17.8 12.4 163.1 75.5 Barnacle 1 95.8 598.3 38.4 106.7 50.1 108.2 nauplii 2 162.6 206.4 28.5 7,8. 4 so. 7 141.5 X 129.2 402.4 33.5 92.5 50.4 124.8 s 47.2 277.1 7.0 20.0 0.4 23.5 s-X 33.4. 195.9 s.o 14.1 0.3 16.6 Polychaete 1 10.4 39.4 28.8 24.2 15.0 24.0 larvae 2 6.0 38.2 28.5 0.0 0.0 12.3 x 8.2 38.8 28.7 12 .1

• 7.5 18.2 s 3.1 0.8 0.2 17.1 10.6 8.3 s-X 2.2 0.6 0.2 12.l 7.5 5.9 tltelecypod 1 0.0 70.8 43.6 5.0 4.0 larvae

• 2 3.0 84.1 40.8 16. 9 23.1 x 1.5 77.5 42.2 11. 0 13.5 s 2.1 9.4 2.0 8.4 13.5 s-X 1.5 6.6 1.4 5.9 9.5 Rotifers 1 15.7 9.6 29.1 15.0 1.3 2

- 7.6 0.0 9.4 o.o 3.1 X 11. 7 4.8 19.2 7.5 2.2 s 5.7 6.8 13.9 10.-6 1.2 s- 4.0 4.8 9.8 7.5 0.9 X

Harpacticoid 1 7.9 19.2 4.8 15.0 2.7 copepods 2 o. 0 . 7.1 3.1 16.9 4.6 x 3.9 13.2 4.0 16.0 3.6 s 5.6 8.6 1.2 1.3 1.4 s-X 3.9 6.0 0.8 0.9 1. 0 Eurytemora 1 47.2 19.2 0.0 10.0 0.0 sp. 2- 0.0 0.0 15.7 33.8 12.3 X 23.6 9.6 7.8 21. 9 6.2 s 33.4 13.6 11.1 16. 8 8.7 s- 23.6 9.6 7.8 11.9 :6.2 X

117

• Table Bl8. (continued)

Stations Organisms DWS Intake RPS HPW3 HPW2 HPWl

~osmina sp. 1 5.0 2.7 2 0.0 0.0 x 2.5 1.3 s 3.5 1. 9 s-  :.. 2.5 1.3 X

Gastropod 1 0.0 2.7 larvae 2 16.9 1.5 X 8.4 2.1 s 11. 9 0.8 s-X 8.4 0.6 Decapod 1 4.8 1.3 larvae 2 0.0 1. 5 X 2.4 1.4 s 3.4 0.1 s-X

. 2.4 0.1 Amphipods 1 2

X s

s-X

118 Table Bl8 .(continued)

Stations Discharge CBE CBC J. I. I.C.D. I.C.U. D.C.

1 558.8 642.1 515.2 891.1 2057.2 1655.7 199.0 2 523.6 1641. 6 183.3 2979.2 3494. 5. 1685.6 491.4 X 541.2 1141.8 349.3 1935.1 2775.9 1670.6 .345.2 s 24.9 706.7 234.7 1476.5 1016. 3 - 21.2 206.7 s-X 17.6 499.7 166.0 1044.1 718.6 15.0 146.2 Acartia sp. 1 192.1 80.6 170.3 260.2 70.4 65.2 26.4 2

• 67.9 60.1 57.6 374.3 98.6 95.1 88.1 X 130.0 70.4 114.0' 317.2 84.5 80.1 57.2 s 87.8 14.4 79.7 80.7 19.9 21.2 43.6 s-X 62.1 10.2 56.4 57.1 14.1 15.0 30.8 Barnacle 1 419.1 106.6 63.9 58.5 576.0 310.0 220.2 nauplii 2 300.6 .367.9 36.7 22.5 572.4 303.0 523.1 x 359.9 237.3 50.3 40.5 574.2 306.5 371.6 s 83.8 184.8 19.2 25.5 2.5 5.0 214.2 s-X 59.2 130.7 13.6 18.0 1.8 3.5 151.5 Polychaete 1 43.7 21.3 25.6 13.0 38.8 72.2 10.6 larvae 2 0.0 42.4 68.1 44.9 77.5 114.5 33.5 X 21.8 31. 9 46.8 29.0 58.1 93.4 22.0 s 30.9 14.9 30.1 22.6 27.4 29.9 16.2 s-X 21.8 10.6 21.3 16.0 19.4 21.1 11.4

.ecypod 1 26.2 0.0 29.8 6.5 35.2 15.8 5.3 larvae 2 77.6 46.0 5.2 44.9 3.5 17.6 3;5 X 51.9 23.0 17.5 25.7 19.4 16.7 4.4 s 36.3 32.5 17.4 27.2 22.4 1.2 1.2 s- 25.7 23.0 12.3 19.2 15.9 0.9 0.9 X

Rotifers 1 - 2.4 8.5 6.5 8.8 24.7 0.0 2 - 17.7 31.4 44.9 3.5 29.9 5.3 X - 10.0 20.0 25.7 6.2 27.3 2.6 s - 10.8 16.2 27.2 3.7 3.7 3.7 I

s-X -* 7.7 11.4 19.2 2.6 2.6 2.6 Harpacticoidl 8.7 0.0 7 .1 ,

8.. 5 - 12.3 12.3 3.5 copepods 2

- 19.4 0.0 - 15.8 24.7 7.0 X 14.1 3.5 4.3 - 14.1 18.5 5.3 s 7.5 5.0 6.0 - 2.5 8.7 2.5 s-X 5.3 3.5 4.3 - 1.8 6.2 1.8 Eurytemora 1 17.5 33.2 - 0.0 1.8 12.3 3.5 sp. 2

- 0.0 28.3 - 37.4 5.3 1.8 12.3 X 8.7 30.7 - 18.7 3.5 7.0 7.9 s 12.4 3.4 - 26.5 2.5 7.5 6.2 s 8.7 2.4 - 18.7 1. 8 5.3 4.4 x

119 Table Bl? (continued)

Stations Organisms - Disch~rg~ CBE CBC J. I. I.C.D. r.c.u. D.C.

9smina sp. 1 2.4 - - 5.3 7.0 1.8 2 o.o - - 0.0 o.o 0.0 X 1. 2 - - 2.6 3.5 0.9 s 1. 7 - - 3.7 5.0 1. 2 s-X 1. 2 - - 2.6 3.5 0.9 Gastropod 1 8.7 3.5 0.0 larvae 2 29.1 3.5 1.8 X 18.9 3.5 0.9 s 14.4 0.0 1.2 s-X 10.2 0.0 0.9 Decapod. 1 larvae 2 x

s s-X Amphipods 1 24.7 2 24.7 x 24.7 s 0.0 s-X 0.0 e

e*

120 Table B19 James River Zooplankton September 6, 1977 (Numbers of organisms per 100 liters, surface samples, two samples per station) eOrganisms DWS Intake Stations HPS HPW3 HPW2 HPWl Copepod 1 300.9 108.6 826.3 947.4 3075.7 . 966.9 nauplii 2 596.4 881.4 768.1 1086.0 5421. 9 1354.1 X 448.6 495.0 797.2 1016.7 4248.8 1160.5 s 209.0 546.5 41.2 98.0 1659.0 273.8 s-X 147.8 386.4 29.1 69.3 1173.1 193.6 Pelecypod 1 3.2 12.8 2528.0 lOlLO 3289.5 1576.6 larvae 2 9.3 127.7 - 2792.8 1736.4 4090.6 1829.4 X . 6. 3 70.3 2660.5 1373.7 3690.0 1703.0 s 4.3 81.3 187.2 513.0 566.4 178.7 s-X 3.0 57.5 132.4 362.7 400.5 126.4 Acartia sp. 1 128.5 51.1 143.9 195.4 390.2 239.9 2 167.7 102.2 . 120.6 267.4 332.1 207.2 X 148 .1 . 76.6 132.. 2 231.4 361.1 223.6 s 27.8 36.1 16.4 50.9 41.1 23.1 s-X 19.6 25.6 11.6 36.0 29.0 16.3 Barnacle 1 17.9 19.2 131.6 22.7 53.4 45.8 nauplii 2 28.0 38.3 80.4 66.2 132.8 196.2 X 22.9 28.7 106.0 44.4 93.1 121. 0 s 7.1 13.6 36.2 30. 7 56.1 106.4 eRotifers s-1 X

5.0 1.6 9.6 0.0 25.6 45.6

.21. 7 104.5 39.7 72.2 75.2 38.4 2 1.9 281. 0 28.2 38.6 102.6 77 ,4_

X 1.8 140.5 36.9 71.6 87.4 57.9 s 0.2 198.7 12.4 46.6 21.6 27.5 s-X 0.1 140.5 8.7 33.0 15.2 19.5 Polychaete 1 1.6 6.4 19.3 4.5 32.1 65.9 larvae 2 5.6 25.6 20.1 0.0 24.2 22.1 X 3.6 16.0 19.7 2.3 28.1 44.0 s 2.8 13.6 0.6 3.2 5.6 31.0 s-X 2.0

• 9. 6 0.4 2.3 4.0 21. 9 Eurytemora 1 0.0 7.0 27.3 8.0 16.5 sp. 2 11.2 16.1 8.3 6.0 0.0 x 5.6 11.6 17.8 7.0 8.2 s 7_. 9 6.4 13.4 1.4 11.6 S- 5.6 4.5 9.5 l~O 8.2 X

Harpacticoid 1 5.3 2.3 0.0 1.8 copepods 2 2.0 0.0 3.0 8.3 x 3.6 1.1 1.5 . 5 .1 s 2.3 1.6 2.1 4.6 s_ 1.6 1.1 1.5 3.2 X

121 Table BlS (continued)

Stations 9organisms DWS Intake HPS HPW3 HPW2 HPWl Gastropod 1 1.6 - 1.8 - - 0.0 larvae 2

- 0.0 - 0.0 - - 2.8 X 0.8 - 0.9 - - 1.4 s 1. 2 - 1. 2 - - 2.0 S:x 0.8 - 0.9 - - 1.4 Bosmina sp. 1 5.3 - 0.0 2 0.0 - 12.1 X 2.6 - 6.0 s 3.7 - 8.5 s-X 2.6 - 6.0 Cyclopoid 1 copepods 2 X

s S-X Decapod 1 0.0 larvae 2 2.8 x 1.4 s 2.0 s-X 1.4

-Amphipods 1 2

x s

Sx e

122 Table B19 (continued)

- Organisms

.Copepod 1 Discharge 247.6 CBE 706.2 Stations CBC 4826.6 J. I.

762.8

. I.C.D.

1004.0 I.C.U.

1278.7 D.C.

369.9 nauplii 2 295.4 415.7 3118.0 539.3 1349.2 4678.1 380.4 x 271.5 560.9

• 3972.3 651.1 1176.6 2978.4 375.2 s 33.8 205.4 1208.2 158.0 244.1 2403.7 7.5 s-X 23.9 145.3 854.4 111.8 172.6 1699.7 5.3 Pelecypod 1 26.8 5458.9 3270.2 536.4 283.6 376.9 137.4 larvae 2 107. 4* 4997.9 3985.1 220.2 144.4 616.5 366.4 x 67.1 5228.4 3627.6 378.3 214.0 496.7 251. 9 s 57.0 325.9 505.5 223.5 98.4 169.4 161.9 Sx .40.3 230.5 357.4 158.1 69.6 119.8 114.5 Acartia sp. 1 147.2 142.3 697.0 154.0 361.1 334.6 838.4 2 107.4 36.3 447.7 101.1 306.5 190.2 373.4 X 127.3 89.3 572.4 127.6 333.8 262.4 605.9 s 28.1 75.0 176.3 37.4 38.6 102.1 328.8 s~ 19.9 53.0 124.6 26.5 27_.3 72.2 232.5 Barnacle 1 60.2 96.7 45.7 58.0 267.7 213.1 373.4 nauplii 2 125.3 56.1 81. 0 62.9 179.7 320.6 274.8 X 92.8 76.4 63.4 60.4 223.7 266.8 324.1 Je s Sx 46.0 32.6 28'. 7 20.3 25.0 17.7 3.5 2.5 62.3 44.0 76.0 53.7 69.7 49.3 Rotifers 1 6.7 56.4 74.4 38.0 0.0 1086.8 0.0 2 0.0 69.3 66.9 18.0 708.1 3772.8 21.1 X 3.4 62.8 70.6 28.0 354.0 2429.8 10.6 s 4.7 9.1 5.4. 14.2 500. 7 1899.3 15.0

s.x 3.4 6.4 3.8 10.0 354.0 1343.0 10.6 Polychaete 1 20.1 10.7 15.2 19.9 70.4 47.6 70.4 larvae 2 13.4 19.8 16.2 27.0 112.7 109.2 59.9 X 16.8 15.3 15.7 23.4 91.6 78.4 65.2 5 4.7 6.4 0.7 5.0 29.9 43.6 7.5 s- 3.3 4.5 0.5 3.5 21.1 30.8 5.3 X

Eurytemora 1 3.4 1.8 1. 8 sp. 2 0.0 0.0 3.5 X 1. 7 0.9 2.6 s 2.4 1.2 1.2 Si 1. 7 0.9 0.9 Harpacticoid 1 13.4 0.0 7.0 15.8 7.0 copepods 2 4.5 2.0 21.1 28.2 7.0 X 8.9 1.0 14~1 22.0 7.0 s 6.3 1.4 10.0 8.7 0.0 s- 4.4 1.0 7.0 6.2 0.0 X

123 Table Bl9 (continued)

Stations Organisms Discharge CBE CBC J .I. I.C.D. r.c.u. D.C.

Gastropod 1 0.0 14.09 8.8 3.5 larvae 2 4.5 14.09 10.6 7.0 X 2.2 14.09 9.7 5.3 s 3.2 0.0 1. 2 2.5 S- 2.2 0.0 0.9 1.8 X

Bosmina sp. 1 10.7 0.0 8.8 2 19.8 2.0 0.0 X 15.3 1. 0 4.4 s 6.4 1.4 6.2 S- 4.5 1. 0 4.4 X

Cyclopoid 1 0.0 7.0 0.0 copepods 2 2.0 3.5 10.6 X 1. 0 5.3 5.3 s 1.4 2.5 7.5 Sx 1. 0 1.8 5.3 Decapod 1 0.0 10.7 larvae 2 13.4 3.3 X 6.7 7.0 s 9.5 5.3 s-X 6.7 3.7

~phipods 1 1.8 0.0 3.5 2 3.5 10.6 0.0 X - 2.6 5.3 1.8 s 1. 2 7.5 2.5 s~ 0.9 5.3 1.8 X

124 Table B20 James River Zooplankton *November 9, 1977 (Numbers of organisms per 100 liters, surface samples, two samples per station)

Stations Organisms DWS Intake HPS HPW3 HPW2 HPWl Copepod 1 451.2 276.4 1958.8 80.4 684.0 208.5 nauplii 2 649.1 355.3 1475.8 86.6 716.0 338.0 x* 550.1 315.8 1717.3 83.5 700.0 273.3 s 139.9 55.8 341.5 4.4 22.6 91.6.

• s- 99o0 39.5 241.5 3.1 16.0 64.8 X

Polychaete 1 2.3 28.5 80.4 31. 9 31.2 136.9 larvae 2 17.6 46.4 73.2 31.1 39.0 262.5 X- 10.0 37.4 76.8 31.5 35.1 199.7 s 10.8 12.7 5.0 0.5 5.5 88.8 s- X 7.7 9.0 3.6 0.4 3.9 62.8 Barnacle 1 9.3 10.7 12.5 3.8 2.8 4.9 nauplii ~ 15.1 30.5 24.4 1.4 0.0 5. 3.

X 12.2 20.6 18.4 2.6 1.4 5.1 s 4.1 14.0 8.4 1.8 2.0 0.3 sx 2.9 9.9 6.0 1.2 1.4 0.2 eecartia sp. 1 32.5 71.2 220.3 8.9 178.8 29~6 2 81. 9 82.2' 136.7 5.4 180.2 31.8 X 57.2 76.7 . 178. 5 7.2 179.5 30.7 s 35.0 7.8 59.1 2.5 1.0 1.6.

Sx- 24.7 5.5 41.8 1.8 0.7 1.1 Rotifers 1 31.3 42.7 20.8 30.6 6.2 2 31.5 72.9 26.8 24.4 0.0 X 31.4 57.8 23.8 27.5 3.1 s 0.1 21.4 4.3 4.4 4.4 Sx 0.1 15.1 3.0 3.1 3.1 Pelecypod 1' 0.0 7.1 0.0 '1.3 2.5 larvae 2 7.6 8.0 1.2 5.4 6.6 X

- 3.8 7.5 0.6 3.4 4.6 s 5.4 0.6 0.9 2.9 2.9*

s-X 3.8 0.4 0.6 2.1 2.1 Eurytemora sp. 1 12.8 14.2 2 10.8 34.1 X 11.8 24.1 s - . 1.4 14.1 S- 1. 0 10.0 X

- 125

. Table B20 * (continued)

Stations eorganisms DWS Intake HPS HPW3 HPW2 HPWl Harpacticoid 1 2.8 10.2 22.7 0.0 copepods 2 7.3 6.8 39.0 1.3 x 5.0 8.5 30.8 0.7 s 3.2 2.4 11.5 0.9 Sx 2.3 1. 7 . 8.1 0.7 Cyclopoid 1 0.0 2.8 1.2 copepods 2 2.4 0.0 0.0 X 1.2 1.4 0.6 s 1. 7 2.0 0.9 s-X 1.2 1.4 0.6 Gastropod 1 0.0 0.0 2.8 0.0 larvae 2 1.3 6~6 1.2 2.6 X 0.6 3.3 2.0 1.3 s 0.9 4.7 1.1 1.9 Sx 0.6 3.3 0.8 1.3 Amphipods 1 2

x s

S:x

126 Table B20 (continued)

Stations Organisms Discharge CBE CBC J. I. I.C.D. I.C.U. D.C.

Copepod 1 143.2 137.2 336.0 170.5 514.3 720.4 244.8 nauplii 2 139.1 231.2 469.0 173.4 558.3 709.8 204.3 x 141.2 184.2 402.5 172.0 536.3 715.1 224.6 s 3.0 66.5 94.1 2.1 31.1 7.5 28.6 sx 2.1 47.0 66.6 1.5 22.0 5.3 20.3 Polychaete 1 22. 2 - 116.5 25.3 14.9 105.7 88.1 33.5 larvae 2 11.6 133.3 20.0 23.0 86.3 123.3 72.2 x 16.9 124.9 22.6 19.0

• 96. 0 105.7 52.8 s 7.5 11. 9 3.8 5.8 13.7 24.9 27.4 s- X 5.3 8.4 2.7 4.1 9.7 17.6 19.4 Barnacle 1 44.5 I 15

• 5 1.4 2.71 22.9 10.6 49.3 nauplii 2 39.1 9.5 6.7 2.71 .40.5 10.6 61.6 X 41.8 12.5 4.0 2.71 31. 7 10.6 55.5 s 3.8 4.2 3.7 0.0 12.4 O.*O 8.7 Sx 2.7 3.0 2.6 0.0 8.8 0.0 6.2 Acartia sp. 1 18.1 23.3 23.9 65.0 52.8 66.9 10.6 2 26.1 13.6 26.6 66.4 38.8 81. 0 14.1 x *22.1 18.4 25.3 65.7 45.8 74.0 12.3 s 5.6 6.9 1. 9 1.0 10.0 10.0 2.5 s-X 4.0 4.8 1.4 0.7 7.0 7.0 1.8 t9tifers 1 19.5 6. 5. 11.2 67.6 84.5 49.3 63.4 2 11.6 \

5.4 13.3 17.6 44.0 82.8 51.1 x 15.5 . 6. 0 12.3 42.6 64.3 66.0 57.2 s 5.6 0.7 1.5 35.4 28.6 23.7 8.7 s-.x 3.9 0.5 1. 0 25.0 20.2 16.7 6.2 Pelecypod 1 0.0 3.9 1.8 10:6 larvae 2 2.9 1.4 1. 8 8.8 x 1.4 2.6 1.8 9.7 s 2.0 1.8 0.0 1.2 Sx 1.4 1.3 .;. 0.0 0.9 Eurytemora 1 3.9 2.8 46.0 0.0 sp. 2 0.0 4.0 39.3 5.3 X 1..9 3.4 42.6 2.6 s 2.7 0.8 4.7 3. T s-X 1.. 9 0.6 3.4 2.6 e

127 Table B20 (continued)

Stations Organisms - Discharge CBE CBC J. I. I.C.D. I.C.U. D.. C.

lrpacticoid 1 20.3 0.0 5.3 copepods 2 13.6 1. 8 1.8 x 16.9 0.9 3.5 s 4.8 1.2 2.5 S- 3.4 0.9 1.8 X

Cyclopoid 1 2.8 1.3 2.7 copepods 2 0.0 0.0 2.7 X 1.4 0.6 2.7 s 2.0 0.9 0.0 s- 1.4 0.6 0.0 X

Gastropod 1 1.3 larvae 2 0.0 x 0.6 s 0.9 S:i{ 0.6 Amphipods 1 0.0 1.8 2 2.9 1.8 X 1.4 1.8 s 2.0 0.0 s-X 1.4 0.0 e

e Appendix C Biological Data Tables for the Benthos Study 128

Table Cl James River Benthos; March 8, 1977 Species, Number of Individuals and To al Wet Weight 2

(Without Clam Shell) in Grams per 0.1 m at Each Station Species Station 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Mollusks Rangia cuneata (dead) 8 13 3 20 109 1 12 1 18 3 11 Rangia cuneata (live) 1 7 6 18 3 7 1 7 1 19 3 5 11 Congeria leucophaeta 1 1 Macoma mitchelli Macoma balthica 2 Corbicula manilensis 1 1 1 4 Hydrobia sp. 3 1 23 1 1 21 5 Modiolus demissus ,-..

N

~

Annelids Polychaetes Scolecolepides viridis 1 1 2 1 1 2 5 2 Nereis succinea 1 2 1 2 3 Lysipiddes grayi 1 4 Polydora ligni Laeonereis culveri Heteromas tu s filiformis Oligochaetes 1 1 3 Amphipods Gammarus sp. 8 4 4 9 2 2 Corophium lacustre Lepidactylus dytiscus 1 11 Leptocheirus plumulosus 3 2 2 7 3

Table Cl (cont'd.)

Species Station i 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Isopods Unidentified (Suborder Flabellifera) 1 Cyathura polita 1 2 1 3 Edotea triloba Chiridotea almyra 1 Dipteran larvae 1 Hzdroids X X X X X X X X X X X X X X X X Balanus sp. 4 1 6 60 42 ,.....

w 0

Ectoprocts X X Biomass (grams) .41 1. 7 .99 2.6 .43 1.1 .54 1. 2 .01 . 01 12.6 .21 1. 47 .55 .02 1. 61

e Table C2 James River Benthos; April 25, 1977 Species, Number of Individuals and Total Wet Weight (Without Clam Shell). in Grams per 0.1 m2 at Each Station Species Station 1 2 3 4 5 6 7 8 9 10 11 . 12 13 14 15 16 Mollusks Rangia cuneata 7 4 17 2 2 7 5 2 1 4 Congeria leucophaeta 1 1 1 Macoma mitchelli 6 Macoma balthica Corbicula manilensis 1 1 Hydrobia sp. 1 1 1 9 1 3 Modiolus demissus 1 Annelids ,_.

w Polychaetes Scolecolepides viridis 2 1 5 1 1 5 Nereis succinea 1 1 1 1 1 2 1 Lysipiddes grayi 1 1 1 Polydora ligni 3 Laeonereis culveri 7 2 Heteromastus filiformis 1 Oligochaetes 2 2 1 Amphipods Gammarus ~- 5 2 1 1 10 2 Corophium lacustre 3 3 7 1 1 1 1 Lepidactylus dytiscus 1 3 Leptocheirus plumulosus

- e Table C2 (cont'd.)

Species Station 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Iso:eods Cyathura polita 1 6 l, Edotea triloba Chiridotea almyra Dipteran,la:rvae 1 3 3 Hydroids X X X X X X X X X X X X X X X Balanus sp. 42 14 3 Ecto:erocts X ~

w N

Biomass (grams) .004 4.6 1.44 2. 72 .52 .09 5.3 .81 . 005 .002

• 04 . 005 1. 34 .14 . 04 1.16

e Table C3 James River Benthos; June 20, 1977 Species, Number of Individuals and Total Wet Weight (Without Clam Shell) in Grams per 0.1 m2 at Each Station Species Station 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Mollusks Rangia cuneat*a 1 5 10 6 10 5 17 2 13 15 17 1 4 21 Congeria leucophaeta 1 30 Macoma mitchelli 1 Macoma balthica 1 1 Corbicula manilensis 1 1 2 Hydrobia sp. 8 4 2 1 2 Modiolus demissus 1 4 Annelids I-'

L,J L,J Polychaetes Scolecolepides viridis 9 6 2 2 4 1 Nereis succinea 2 1 1 2 2 1 Lysipiddes grayi 1 Polydora ligni Laeonereis culveri Heteromastus filiformis 2 Oligochaetes 1 1 1 Decapods Rhithropanopeus harrissi 1 Crangon septemspinosus 1

1*

e I.

Table C3 (cont'd.)

Species Station 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Amphipods Gammarus sp. 1 4 2 2 Corophium lacustre 2 1 10 3 5 6 2 47 14 1 2 Lepidactylus dytiscus 13 1 Leptocheirus plumulosus 8 12 4 2 3 1 1 9 10 13 Isopods Cyathura polita 1 3 1 3 Edotea triloba Chiridotea almyra I-"'

w Dipteran larvae 1 1 .i::-

Hydroids X X X X X X X X X X Balanus sp. 180 29 1 403 141 4 1 Ectoprocts X X Biomass (grams) .006 4.98 .11 4.7 .25 4.12 2.22 .87 .53 .28 4.03 15. 3 1. 6 ,.02 .02 5.51

-- e Table C4 e

James River Benthos; July 14, 1977 Species, Number of Individuals and Total Wet Weight (Without Clam Shell) in Grams per 0.1 m2 at Each Station Species Station 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Mollusks Rangia cuneata 2 4 8 34 24 15 10 3 2 14 13 2 5 2 4 12 Congeria leucophaeta 1 Macoma mitchelli 4 3 1 4 1 1 Macoma balthica 1 1 Corbicula manilensis 2 Hydrobia sp. 4 1 3 Modiolus demissus 1 2 Annelids w V1 Polychaetes Scolecolepides viridis 2 3 1 6 5 7 5 1 Nereis succinea 1 2 1 2 Lysipiddes grayi Polydora ligrii Laeonereis culveri Heteromastus filiformis 1 1 15 1 Oligochaetes 1 1 1 Decapods Rhithropanopeus harrissi 1 Amphipods Gammarus SIJ. 1 1 :i.

Corophium lacustre 378 1 1 3 1 Lepidactylus dytiscus 2 2 Leptocheirus plumulosus 4 2 1 3 10 7 15 2 13 8 11

Table C4 (cont'. d)

Species Station 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Isopods Cyathura polita 1 1 1 1 1 1 1 3 Edotea triloba 1 Chiridotea almyra Di12teran larvae 3 Hydroids X X X X X X X X X X X X Balanus ~* 11 9 3 20 18 38 t--"

w Ectoprocts X ~

Biomass (grams) 1.45 2. 77 1. 6 15.2 .57 2.04 .68 .65 .84 .05 4.84 .01 . 62 .03 .02 2.63

e Table cs James River Benthos; August 18, 1977 Species, Number of Individuals and Total Wet Weight (Without Clam Shell) in Grams per 0.1 m2 at Each Station Species Station 1 2 3 4 5 6 . 7 8 9 10 11 12 13 14 15 16 Mollusks Rangia cuneata 2 7 2 6 9 11 5 17 11 9 11 5 19 4 10 Congeria.leucophaeta 2 Macoma mitchelli 1 2 1 1 Macoma balthica Corbicula manilensis 1 Hydrobia sp. 3 1 1 2 3 2 Modiolus demissus 4 .....

w

-..J Annelids Polychaetes Scolecolepides viridis 4 1 2 4 3 6 1 4 2 Nereis succinea 7 1 1 1 1 1 3 1 1 Lysipiddes grayi Polydora ligni 3 Laeonereis culveri Heteromastus filiformis 2 1 4 1 2 Oligochaetes 1 Decapods Rhithropanopeus harrissi 1 Crangon septemspinosus 1

e Table cs (cont'd.)

Species Station 1 2 3 4 5 6 7 8 9 10

• 11 12 13 14 15 16 Amphipods Gammarus sp.

Corophium lacustre 16 1 6 3 Lepidactylus dytiscus 5 3 1 Leptocheirus plumulosus 1 10 3 10 8 1 12 1 3 12 4 8 19 Isopods Cyathura polita 1 l 1 l 3 Edotea ti;-iloba.

Chii:idotea almy~a .....

1 (.,.,)

Diptei:an larvae' 1 00 Hydroids X X X X X X

• Bal anus_ ~. 2 1 23 2 5 5 13 Ectoprocts X X X X X Biomass (gi:ams) 1.14 5,07 2,36 1,56 , 04 4,22 .~3 1~6.9 2,18 1~04 3,85 , 02 t86 , 02 ,31 3,75

Table C6 James River Benthos; October 20, 1977 Species, Number of Individuals and Total Wet Weight (Without Clam Shell) in Grams per 0.1 m2 at Each Station Species Station 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Mollusks Rangia cuneata 7 6 8 10 8 6 2 3 5 11 11 2 1 2 27 Congeria leucophaeta Macoma mitchelli 11 7 2 4 4 10 2 4 2 3 3 1 4 Macoma b.althica 1 Corbicula manilensis Hydrobia sp. 1 1 1 2 1 1 w

\0 Modiolus demissus 1 1 2 2 1 6 Annelids Polychaetes Scolecolepides viridis 1 6 1 4 4 6 2 Nereis succinea 14 2 3 1 5 2 2 9 9 4 8 1 Lysipiddes gray.i Polydora ligni Laeonereis culveri Heteromastus filiformis 1 4 7 1 Oligochaetes 1 1 Deca:12ods Rhithro:12ano:12eus harrissi 1

e Table C6 (cont ' d . )

Species Station 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Amphipods Gammarus sp.

Corophium lacustre 1 Lepidactylus dytiscus 2 1 Leptocheirus plumulosus 4 2 3 4 1 3 7 1 Isopods Cyathura polita 1 1 1 1 1 1 1 Edotea triloba 1 1 Chiridotea almyra ......

.p.

0 Dipteran larvae Hydroids X X X X X X X X X X

_ Balanus sp. 10 *l 4 14 18 38 5 Ectoprocts X X X: X X X X X Biomass (grams) 3.8 2.8 .01 3.64 . 05 3.2 3. 96 .89 .02 .76 3.52 8.40 .07 .04 1.47 6.75

141 Table C7 Diversity and Related Parameters for Benthic Samples March 8, 1977 Station Number of Number of SHANNON Formula RICHNESS Number Individuals SPECIES H-PRIME S-1/LN N 1 4 2 0. 8113 o. 7213 2 8 2 0.5436 0.4809 3 14 4 1. 7884 1.1368 4 23 4 1. 0862 0.9568 5 13 4 1.4885 1.1696 6 43 10 2.2530 2.3928 7 3 3 1.5850 1.8205 8 17 5 1.9015 1. 4118 9 5 4 1. 9219 1.8640 10 9 3 1. 3921 0. 9102 11 38 6 1. 9624 1. 3745 12 18 4 1.5003 1. 0379 13 7 4 1. 8424 1. 5417 14 97 8 1. 7363 1.5302 15 49 2 0.5917 0.2569 16 21 4 1. 7057 0.9854 All Stations Combined 370 17 2. 9313 2.7057 e

142 Table C8 I

Diversity.and Related Parameters for Benthic Samples April 25, 1977 Station Number of Number of SHANNON Formula RICHNESS Number Individuals SPECIES H-PRIME S-1/LN N 1 2 2 1.0000 1. 4427 2 13 3 1. 2957 o. 7797 3 16 7 2.6556 2.1640 4 20 4 0.8476 1.001 5 8, 3 1.2988 0.9618 6 9 5 2.1972 1.8205 7 13 4 1. 6692 1.1696 8 8 4 1.5488 1.4427 9 2 2 1.0000 1.4427 10 2 2 1.0000 1. 4427 11 63 8 1. 7171 i. 6895 12 5 3 1.3710 1.2427 13 13 6 2.0349 1. 9494 14 36 6 1. 9740 1.3953 15 15 5 1. 9656 1.4771 16 14 6 2.4138 1.8946 All Stations Combined 239 19 3. 4311 3.2868

143 Table C9 Diversity and Related Parameters for Benthic Samples June 20, 1977 Station Number of Number of SHANNON Formula RICHNESS Number Individuals SPECIES H-PRIME S-1/LN N 1 11 3 1. 0958 0.8341 2 11 4 1. 6767 1. 2511

,/

3 13 3 o. 9913 o. 7797 4 29 5 1. 9011 1.1879 5 201 7 o. 7241 1.1314 6 22 2 0.9940 0.3235 7 15 4 1. 8256 1.1078 8 58 - 7 1. 8946 1.4777 9 17 3 1.0224 0.7059 10 20 5 1. 5789 1.3352 11 517 15 1. 3130 2.2407 12 182 10 1. 2690 1. 7294 13 13 5 1. 5059 1.5595 14 12 5 2.0850 1. 6097 15 12 2 0.6500 0.4024 16 43 8 2.0054 1. 8611 All Stations Combined 1176 21 2.0090 2.8289 I.

144 Table ClO Diversity and Related Parameters for Benthic Samples July 14, 1977 Station Number of Number of SHANNON Formula RICHNESS Number Individuals SPECIES H-PRIME S-:c:1/LN N 1 402 9 0.4686 1. 3341 2 8 4 1. 7500 1. 4427 3 8 1 0.0000 0.0000 4 46 6 1. 3719 1.3059 5 46 9 2. 2011 2.0895 6 33 8 2.1178 2.0020 7 12 2 0.6500 0.4024 8 19 6 2.1471 1. 6981 9 6 3 1.5850 1.1162 10 41 7 2.1498 1. 6157 11 66 10 2.6458 2.1481

'\

12 7 4 1.9502 1. 5417 13 5 1 0.0000 0.0000 14 22 5 1. 6542  : ,1. 2941 15 34 7 1. 9388 1. 7015 16 67 6 1. 7788 1.1891 All Stations Combined 822 20 2.4735 2.8309

145 e Table Cll Diversity and Related Parameters for Benthic Samples August 18, 1977 Station Number of Number of SHANNON Formula RICHNESS Number Individuals SPECIES H-PRIME S-1/LN N 1 32 6 2.0109 1. 4427 2 20 .5 1. 6784 1.3352 3 3 2 o. 9183 0.9124 4 14 4 1. 8774 1.1368 5 25 6 1. 8539 1.5533 6 25 6 1. 9715 1. 5533 7 7, 4 1. 1488 1. 5417 8 61 12 2.5899 2.6758 9 19 4 1.5288 1.0189 10 26 6 1. 7947 1.5346 11 23 6 2.0165 1. 5946 12 10 5 1.6855 1. 7372 13 40 5 1. 8598 1.0843 14 19 8 2.6101 2. 3774 15 14 4 1. 5216 1.1368 16 46 6 1. 9576 1. 3059 All Stations Combined 399 20 2.9853 3.1725 e

146 e Table Cl2 Diversity and Related Parameters for Benthic Samples October 20, 1977 Station Number of Number of SHANNON Formula RICHNESS Number Individuals SPECIES H-PRIME S-1/LN N

.1 38 6 2.1161 1. 3745 2 14 4 1. 2958 1.1368 3 6 3 1.5850 1.1162 4 17 5 1: 9254 1.4118 5 26 6 2.2109 1.5346 6 29 8 2.4451 2.0788 7 11 5 1. 8676 1.6681 8 17 6 1. 8981

• 1. 7648 9 9 3 1. 3516 0. 9102 10 16 8 2. 6.494 2.5247 11

• 32 8 2.5717 2.0198 12 46 7 2.4932 1. 5671 13 29 7 2.4288 1.7818 14 28 6 1. 6981 1.5005 15 50 5 1.1354 1.0225 16 44 6 1. 7435 1. 3213 All Stations Combined 415 16 2.9637 2.4883