1540 FP- PB- eA)

Orange and Rockland Utilities, Incorporated

Pearl River. New York

. J

. .

Effectiveness Evaluation of 

Fine Mesh Barrier Net Located at the

Cooling Water Intake of the 

Bowline Point Generating Station

1994 Barrier Net Evaluation Program Report

January 1996

~ Lawler, Matusky & Skelly Engineers LLP

One Blue Hill Plaza' Pearl River, New York 10965

ENVIRONMENTAL SCIENCE & ENGINEERING CONSULTANTS
ORANGE AND ROCKLAND UTILITIES, INCORPORATED

Pearl River, New York

EFFECTIVENESS EV ALVATION OF A FINE MESH

BARRIER NET LOCATED AT THE COOLING

WATER INTAKE OF THE BOWLINE POINT GENERATING STATION

1994 BARRIER NET EV ALVA TION PROGRAM REPORT

January 1996

LMSE-96/0081 & 169/318

LA WLER, MA TUSKY & SKELLY ENGINEERS LLP

Environmental Science & Engineering Consultants

One Blue Hill Plaza

Pearl River, New York 10965

mbll-2.S-96 11:SOamIH24618/169-318/coycr/
T ABLE OF CONTENTS

Page No.

LIST OF FIGURES AND PHOTOGRAPHS

LIST OF TABLES

Program Summary

Introduction

Description of 1994 Fine Mesh Barrier Net Program

3.4

Ichthyoplankton Monitoring Program

Barrier Net Effectiveness MonitOring Program

Ichthyoplankton Sample Analysis

Schedule of Events

3-4

3-4

Program Results

4.3

4.4

Water Quality Information

Ichthyoplankton Abundance MonitOring Program

Barrier Net Evaluation Program

Bowline Point Generating Station Unit Operation

Ichthyoplankton Abundance MonitOring Program

Inventory and Abundance of Taxa Collected

Ichthyoplankton Abundance and Concentration

3.3 Length-Frequency Information 4-4

Fine Mesh Barrier Net Effectiveness Monitoring Program 4-4

4.4. Inventory and Abundance of Taxa Collected

4.4. Ichthyoplankton Abundance and Concentration

4.4.3 Length-Frequency Information

4.4.4 Inside Barrier Net Velocity Profiles

4-4

4-6

Bay Anchovy Body Length to Body Depth Relationship

Discussion and Conclusions

General Program Description

Discussion of Program Results

MB/1-22-96 S:3SamlH2461S/169-31srr-o-c/ Lawler, Matusky & Skelly Engineers LLP
T ABLE OF CONTENTS

Ichthyoplankton Abundance Monitoring Program

Fine Mesh Barrier Net Effectiveness Evaluation

Program

5.4

Conclusions

Recommendations

References Cited

IT ACHMENTS

Attachment A - Water Quality Information

Attachment B - Ichthyoplankton Collection Information

Attachment C - Length Frequency Information by Location arid Date

Attachment D - Bay Anchovy Body Length - Body Depth Measurements 1994

Page No.

5-6

MB/1-22-96 S:3SamlH2461S/169-31srr-o-c/ Lawler, Matusky & Skelly Engineers LLP
Figure/Photograph No.

Figure 3-

Figure 3-

Figure 3-

Photograph 3-

Photograph 3-

PhotOgraph 3-

PhotOgraph 3-4

Figure 3-4

PhotOgraph 3-

Photograph 3-6

Photograph 3-

Photograph 3-

Figure 5-

Figure 5-

Figure 5-

LIST OF FIGURES AND PHOTOGRAPHS

Title Page No.

Location of Bowline Point Generating Station

Fine Mesh Barrier Net Ichthyoplankton Monitoring Stations

Fine Mesh Barrier Net Evaluation Program:

5m Plankton Net Sample Transects

Fine Mesh Barrier Net Support Piles 3-4A

Deploying the Fine Mesh Barrier Net 3-4A

Deployed Fine Mesh Barrier Net 3-4B

Cooling Water Intake Pump Sampling Set-up 3-4B

Fine Mesh Barrier Net Deployment 3-4C

Top of Net Submerged Along North Side Near Apex

Section of Fine Mesh Barrier Net Showing Biofouling and

Area Cleaned by High Pressure Spray Wash System

Fine Mesh Barrier Net Being Removed from the Water

Fine Mesh Barrier Net Piled on Deck of Work Barge

Following Removal

Bay Anchovy Concentration - Inside Barrier Net Stations 5-4A

Bay Anchovy Concentration - Outside Barrier Net Stations 5-4B

Bay Anchovy Average Concentration - Inside vs Outside 5-4C

mb/l-22-96 l:O6pmIH2461S/169-31SII-o-f-p iii Lawler, Matusky & Skelly Engineers LLP
LIST TABLES

Table No. Title Page No.

Ichthyoplankton Abundance Monitoring Program: Sample

Collection Dates and Stations Sampled

Barrier Net Effectiveness Monitoring Program: Sample

Collection Dates and Locations Sampled

Ichthyoplankton Abundance Monitoring Program:

Water Quality Information

Fine Mesh Barrier Net Evaluation Program: Water

Quality Information

Bowline Point Generating Station, Circulating Water Pump

Operation and Cooling Water Flow, Fine Mesh Barrier Net

Evaluation Study: 1994

4-4 Ichthyoplankton Abundance MonitOring Program:

Species Inventory and Abundance 22 June-8 July 1994

Ichthyoplankton Abundance MonitOring Program:

Abundance and Concentration of Morone spp.

4-6 Ichthyoplankton Abundance Monitoring Program:

Abundance and Concentration of Bay Anchovy

4-4A

Ichthyoplankton Abundance Monitoring Program:

Abundance and Concentration of Hogchoker

4-4B

Ichthyoplankton Abundance Monitoring Program:

Abundance and Concentration of Clupeidae

4-4C

Ichthyoplankton Abundance MonitOring Program:

Bay Anchovy Length Frequency Information

4-4D

Fine Mesh Barrier Net Evaluation Program: Species

InventOry and Abundance By Location

4-4E

Fine Mesh Barrier Net Evaluation Program: Abundance

and Concentration of Bay Anchovy

Fine Mesh Barrier Net Evaluation Program: Abundance

and Concentration of Hogchoker

mbll-22-96 l:04pmIH246181l69-318/L'()-T Lawler, Matusky & Skelly Engineers LLP
LIST OF TABLES

(Continued)

Table No. Title

Bay Anchovy Length Frequency Information: Pump S~mples

and Plankton Net Samples Collected Inside the Barrier Net - 1994

Bay Anchovy Length Frequency Information: Plankton Net

Samples Collected Outside the Barrier Net - 1994

Fine Mesh Barrier Net Evaluation Program - 1994

Inside Barrier Net Velocity Profiles

Page No.

mbll-22-96 S:38amIH2461S/169-31S/L'()-T Lawler, Matusky & Skelly Engineers LLP
CHAPTER 

PROGRAM SUMMARY

Orange and Rockland Utilities, Inc. (ORU) contracted Lawler, Matusky Skelly

Engineers LLP (LMS) to conduct a program to determine the effectiveness of a fine mesh

barrier net (3. 0 mm mesh opening) at limiting ichthyoplankton entrainment at the Bowline

Point Generating Station (BPGS). The evaluation program was conducted in two separate

phases: Phase I was an ichthyoplankton abundance monitoring program designed to

determine abundance levels of the target species (bay anchovy (Anchoa mitchU/z1) and to

time the deployment of the fine mesh barrier net; and Phase II was an ichthyoplankton

sampling program with samples collected at stations inside and outside of the fine mesh

barrier net to determine the exclusion effectiveness of the net.

The ichthyoplankton abundance monitoring program was conducted between 22 June and

8 July 1994. The results of the abundance monitoring program indicated that the

dominant ichthyoplanktonspecies present were Morone spp. (striped bass, white perch),

with bay anchovy larvae the second most abundant species. Two general areas were

sampled Haverstraw Bay and Bowline Pond , with greater numbers of larvae collected at

Haverstraw Bay sampling stations.

Based on the results of the ichthyoplankton abundance monitoring program, the fine mesh

barrier net was deployed during the second week of July with deployment complete on

13 July 1994. Ichthyoplankton sampling to determine barrier net effectiveness

commenced on 12 July and continued through 5 August 1994 when the net was removed.

The 1994 fine mesh barrier net evaluation period was limited due to extensive net

biofouling which resulted in snapping of two of the support piles. Underwater cleaning

which was relatively successful during 1993 when the net was fouled by fine sediment

was not successful during 1994 when the net was fouled by the algae Ectocarpus sp.

Successful cleaning of the net was achieved by removing the net from the water prior to

spraying with a high pressure wash system. Overall there was no difference recorded in

the concentration of bay anchovy larvae between inside and outside net locations during

the 1994 study period.

MB/l-23-96 3:4OpmIh24618/169-318/chap-1I Lawler, Matusky & Skelly Engineers LLP
The following conclusions are based on the fine mesh barrier net evaluation studies

conducted by LMS during 1992 through 1994:

. A fine mesh barrier net (3.0 mm mesh) can be deployed around the BPGS

cooling water intake structure without limiting use of Bowline Pond or

imposing operating restrictions on BPGS cooling water pump operation.

Fine sediment colgging of the mesh can be cleaned using a high pressure

wash system with the net fully deployed. however, the underwater cleaning

requires divers and is very inefficient as to time and areal coverage.

Biofouling growth is not effectively removed underwater, but can be

effectively removed using a high pressure spray system with the net out of

. the water.

. Bay anchovy abundance levels were low during both 1993 and 1994 when

the fine mesh barrier net was deployed. In addition, the period when the

bay anchovy larvae are present in the vicinity of the plant was of short

duration. The low abundance levels and short time frame to evaluate

barrier net effectiveness has limited the ability of a biological monitoring

program to effectively determine the effectiveness of the fine mesh barrier

net.

MB/l-4-96 3:47pmlh24618/169-318/chap-l/ Lawler, Matusky & Skelly Engineers LLP
CHAPTER 2

INTRODUCTION

BACKGROUND

Since 1977 Orange and Rockland Utilities, Incorporated (ORU) has seasonally deployed (midOctober through mid-May) a barrier net around the Bowline Point Generating Station (BPGS)

cooling water intake, a shoreline intake located on Bowline Pond, to limit fish impingement on

the intake traveling screens (Hutchison and Matousek 1988). During t.':1e spring-summer period

fishery investigations demonstrated that impingement is not a problem at the plant, therefore no

barrier net is installed. The net with nominal 9.5 mm mesh has been shown to be very effective

at mitigating fish impingement (NAI 1995).

As part of the Hudson River Utilities Settlement Agreement (1980) during the spring-summer

period, the Hudson River Utilities agreed to reduce water withdrawal rates at the four lower

Hudson River power plants subject to the agreement, as a means of reducing ichthyoplankton

entrainment impacts. Reduction in water withdrawal can be accomplished through either reducing

cooling water pump flow rates, or through unit outages. The Bowline Point Generating Station

in order to meet the requirements of the Settlement Agreement related to reduction in cooling

water withdrawal , mainly employs unit outages coupled with some flow reduction achieved

through reduced circulating water pump operation. The reduction in cooling water withdrawal

from Bowline Pond has been shown to have a direct relationship on the number of

ichthyoplankton entrained (EA 1989).

ORU contracted Lawler, Matusky & Skelly Engineers LLP (LMS) to determine the feasibility 

deploying a fine mesh barrier net at the Bowline Pond intake to the BPGS during the springsummer months as a means of reducing ichthyoplankton entrainment. Work accomplished under

the initial study phase included; (1) summarizing ichthyoplankton information from the Hudson

River (Haverstraw Bay), and Bowline Pond (including entrainment), (2) obtaining information on

water velocities in Bowline Pond concentrating on the inlet to the Pond, and the 9.5 mm mesh

barrier net deployment area, and (3) monitoring net mesh panels made of nylon and polyethylene

for biofouling potential and loss of filtration efficiency due to clogging and biofouling. In

general, the results of the initial phase indicated that a fine mesh barrier net could potentially be

deployed at the cooling water intake over the summer months; however, there were several areas

of concern related to barrier net deployment (LMS 1992).

MB/l-23-96 3:42pmlb2461S/169-31S/chap- Lawler, Matusky & Skelly Engineers LLP
LMS was subsequently contracted by ORU (Phase II) to design a fine mesh barrier net

(configuration mesh size), deploy the net, monitor the net for clogging and biofollling, and

determine the effectiveness of the net at limiting ichthyoplankton entrainment. The evaluation of

the fine mesh barrier net was conducted during the summer of 1993. Prior to the initiation of the

study, LMS evaluated the available ichthyoplankton data to use in determining the period of net

deployment, optimum size of the net mesh opening, and ichthyoplankton abundance and size. The

bay anchovy (Anchoa mitchillz) was determined to be the dominant ichthyoplankton in the study

area, with the period of abundance extending from early July through August. Based on the

dominance of the bay anchovy, it was selected as the target species for the determination of

barrier net effectiveness. Following the selection of the bay anchovy as the target species, a net

mesh size of 3.0 mm (0. 125-in.) was selected.

The results of the fine mesh barrier net evaluation study was summarized in a report submitted

to ORU in April 1994 (LMS 1994). During the 1993 study period, ichthyoplankton abundance

in Bowline Pond was very low, and fine mesh barrier net effectiveness based on larval exclusion

could not be determined.

A second year of fine mesh barrier net effectiveness testing at the BPGS cooling water intake was

scheduled for the summer of 1994. The 1994 study consisted of two biological components; the

first was an ichthyoplankton monitoring program utilizing 0.5m mouth diameter plankton nets in

Bowline Pond and Haverstraw Bay to document the presence and abundance of fish larvae in the

area, and the second was the determination of the effectiveness of a fine mesh barrier net at

limiting ichthyoplankton entrainment.

The same net deployed and tested during 1993 was deployed during 1994, with the same

deployment method used. The sampling and analytical techniques employed in the 1994 study

were the same techniques employed by LMS in conducting the 1993 barrier net effectiveness

evaluation study (LMS 1994).

PROGRAM OBJECTIVES

The primary objective of the 1994 fine mesh barrier net evaluation study is to determine the

effectiveness of the net at excluding fish larvae from the immediate vicinity of the Bowline Point

cooling water intake structure. Specific program objectives are outlined below:

Conduct a bay anchovy monitoring program at Bowline Pond and Haverstraw Bay

stations in order to insure that the net effectiveness study is performed during the

MB/I-Io-96 10:48amIh246IS/169-31S/chap- Lawler, Matusky & Skelly Engineers LLP
peak abundance period. A weekly sample will be collected at a Haverstraw Bay

station throughout the barrier net evaluation study period.

Deploy the fine mesh barrier net as per techniques outlined in LMS 1994.

(NOTE: Fine mesh barrier net deployment will be determined based on bay

anchovy abundance by the ORU project biologist.

Conduct underwater diver observations to determine the integrity of the net

following deployment, document organism impingement (or behavior near the

mesh), and record net clogging and/or biofouling.

Determine barrier net effectiveness through a direct comparison between samples

collected at locations outside of the barrier net to samples collected at inside net

locations.

MB/I- Io-96 10:49amlh2461S/169-31S/chap- Lawler, Matusky & Skelly Engineers LLP
CHAPTER 3

DESCRIPTION OF 1994 FINE MESH BARRIER NET PROGRAM

1 ICHTHYOPLANKTON MONITORING PROGRAM

An ichthyoplankton abundance monitoring program was conducted in the vicinity of the Bowline

Point Generating Station during the period 22 June through 8 July 1994 (Figure 3- 1). Results of

the abundance monitoring program were used to determine the presence and abundance of bay

anchovy larvae in the Bowline Point vicinity, and if the abundance levels were sufficiently high

enough to deploy and initiate effectiveness monitoring of the fine mesh barrier net.

Ichthyoplankton samples were collected using a plankton net with a 0.5 m (1. 64 it) diameter

mouth opening and 0. 5 mm (500 JLm) mesh. Plankton net tows were conducted for 10 minutes

against the prevailing tidal current at a speed of 120 cm/sec (3.9 fps) with velocity through the

water monitored using a General Oceanics velocity meter (Model No. 2031) with on-deck readout

(Model No. 2035). The volume of water filtered through the net was calculated using the start

and end readings from a TSK velocity meter mounted in the center of the net mouth.

Surface and bottom net samples were collected along three transects (stations) on Monday,

Wednesday, and Friday of each week. The surface plankton net was rigged to sample 1.0 m (3

it) below the waters surface, and the bottom plankton net was rigged to sample 2.0 m (6 it) above

the bottom. Surface and bottom samples were combined at each station (following crew chief

examination to obtain instantaneous estimates of larval abundance) prior to laboratory

examination. The sampling dates and stations sampled for the ichthyoplankton abundance

monitoring program are presented in Table 3-

Sampling was conducted on a diurnal schedule with the surface and bottom tows done at the same

time at each station. The three sampling transects are described below and shown on Figure 3-

Bowline Pond in the vicinity of the Bowline Point cooling water intake structure

and the area indicated for barrier net deployment.

In the Hudson River along a transect parallel to shore just off the inlet to Bowline

Pond. Station water depth approximately 6 m (20 it).

In Haverstraw Bay along a transect that is representative of the Hudson River at Bowline Point. 

MB/I-Io-96 11 :04amIh2461S/169-31S/chap-3/ Lawler, Matusky & Skelly Engineers LLP
sR 

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Figure 3-

Location of

Bowline Point Generating Station

. Map source: NOAA Chart No. 12343, 1984

ORANGE & ROCKLAND UTILITIES, INC,

ICHTHYOPLANKTON MONITORING PROGRAM

LAWLER, MATUSKY & SKELLY ENGINEERS LLP

Peart River, New Yorit
TABLE 3-

ICIITHYOPLANKTON ABUNDANCE MONITORING PROGRAM

SAMPLE COLLECTION DATES AND STATIONS SAMPLED

BOWLINE POND BOWLINE POND INLET HA VERSTRA W BAY

DATE SURFACE BOTTOM SURFACE BOTTOM SURFACE BOTTOM

22 June 1994

24 June 1994

27 June 1994

29 June 1994

1 July 1994

6 July 1994

8 July 1994

13 July 1994

20 July 1994

27 July 1994
60 120 m

LJ-oI.....J--oI

SCALE IN METERS ORANGE & ROCKLAND UTILITIES, INC,

ICHTHYOPLANKTON MONITORING PROGRAM

LAWLER, MA TUSKY & SKELL V ENGINEERS LLP

\100\169\318,ds4 Pearl RIver, New Vorl(

DIFFUSER

FLOOD

FLOW

i . tow

! = i

DIRECTION

EBB

Map source: EA (1989).

HUDSON RIVER

10 MINUTE TOW

RIVER SITE

22' 28" DEEP

10 MINUTE TOW

INLET SITE

21' 26" DEEP

HA VERSTRA 

SA Y

Figure 3-

Sampling Stations
All samples were examined on the boat immediately following net retrieval by the crew chief

(person qualified to identify bay anchovy larvae) for the presence or absence of bay anchovy

larvae. The presence and identification (field) of any larvae in each sample was noted and a

general abundance level was recorded.

Laboratory analysis of the ichthyoplankton abundance samples consisted of species identification

and enumeration. Up to 100 bay anchovy larvae per life stage per week (from all samples

combined) were measured for total length. All larvae in the abundance samples were preserved

with the larvae actually measured preserved separately.

Following deployment of the fine mesh barrier net, and the start of the net effectiveness

monitoring program, a modified ichthyoplankton abundance monitoring program was conducted

at the Bowline Pond inlet station. One sample per week comprised of combined surface and

bottom sample tows was collected using a 0.5 m mouth diameter plankton net with 0.5 mm

mesh. The tows were conducted for 10 minutes (mins) at 120 cm/sec. A representative sample

of each species identified was measured for total length.

2 BARRIER NET EFFECTIVENESS MONITORING PROGRAM

The major focus of the 1994 fine mesh barrier net evaluation program was the determination of

barrier net effectiveness at mitigating bay anchovy (ichthyoplankton) larval entrainment. 

determine barrier net effectiveness, a direct comparison was made between samples collected at

locations outside of the barrier net to samples collected at inside net locations. The sampling

schedule and samples actually collected for the barrier net effectiveness monitoring program is

presented in Table 3-2. The sampling locations used in the barrier net effectiveness monitoring

program are presented in Figure 3-

1 Inside Barrier Net Sampling Methods

A four-inch trash pump was the primary technique used to collect ichthyoplankton samples inside

the barrier net. Ichthyoplankton sampling was conducted at the BPGS cooling water intake , with

pump samples collected from each unit with operating cooling water pumps. Sample water was

withdrawn from three separate depths corresponding to the top, mid-depth, and bottom of the

operating unit's central trash rack opening, and combined by discharging the entire pump flow

into a water buffered plankton net with 0.5 mm (5ooJLm) mesh. The pumping rate was adjusted

to 1.1 m /min (300 gpm), with a sample duration of 30-min resulting in a total sample volume

of 34 m3 (9, 000 gals). Equal volumes of water were withdrawn from each depth by sampling for

10 min at each depth out of the 30 min sample period. Total sample volume was determined

MBl1- 10-96 3:O2pmlh24618/169-318/cbap- Lawler, Matusky & Skelly Engineers LLP
V,)

TABLE 3-

BARRIER NET EFFECTIVENESS MONITORING PROGRAM

SAMPLE COLLECTION DATES AND LOCATIONS SAMPLED

INSIDE BARRIER NET COLLECTIONS OUTSIDE BARRIER NET COLLECTIONS

!NT AKE PUMP SAMPLES INSIDE PLANKTON NET SAMPLES

UNIT No. UNIT No. PLANKTON NET NORTH SIDE SOUTH SIDE

TOP MID BOITOM TOP MID BOITOM SURFACE BOITOM SURFACE BOITOM SURFACE BOITOM

12 July 1994

13 July 199415 July 1994

18 July 1994

20 July 199422 July 199425 July 199427 July 1994

29 July 19945 August 1994
HUDSON RIVER

DIFFUSER

HA VERSTRA W

SA 

Figure 3-

5-m Plankton Net

Sample Transects 120m

L....J--LJ--.I

SCALE IN METERS

ORANGE & ROCKLAND l1T1LITIES, INC.

ICHTHYOPLANKTON MONITORING PROGRAM

LAWLER, MATUSKY & SKELLY ENGINEERS Ll.

'1001169131S.ds4 I Pearl RIver, New York Map source: EA (1989).
through the direct timed measurement of discharge volume into the plankton net holding collection

tank.

A total of three 30-min pump samples were collected in front of each operating unit during a

diurnal period. Pump sampling was conducted on Monday, Wednesday and Friday of each week

during which the barrier net was deployed (alternate days), with the first sample day conducted

prior to the completion of fine mesh barrier net installation. The collection of the three pump

samples was evenly spaced over the diurnal evaluation period.

In addition to the intake pump samples, a single plankton net tow was conducted inside the barrier

net during each pump sampling date. Two 0.5 m mouth diameter plankton nets with 0.5 nun

(500JLm) mesh (one net deployed to sample the upper half of the water column, and the second

net deployed to sample the lower half of the water column) were towed simultaneously across the

face of the intake structure , with the contents of the two nets combined prior to analysis.

2 Outside Barrier Net Ichthyoplankton Sampling

Plankton nets with a mouth opening diameter of 0.5 m and 0.5 nun mesh were used to collect

ichthyoplankton samples outside the barrier net. Two transects, one along each side of the fine

mesh barrier net, were sampled with plankton nets towed between surface and mid-depth, and

between mid-depth and bottom. The contents of each depth sample along each side of the net

were combined prior to sample analysis. Nets were towed at 120 cm/s (3. 9 ips) for two minutes

resulting in a sample volume of approximately 28 m3 (7 400 gals). Sample tows started at the

bulkhead and proceeded toward the apex of the net, with the two min sample duration ensuring

complete coverage of each side of the net.

Two sets of net samples (set=surface and bottom collections from the north and south net

transects) were collected during a diurnal period , with the sample day corresponding to the pump

sample day. One set of net samples were collected during the morning hours, and the second set

were collected during the afternoon.

At the conclusion of each outside sampling effort, the following physical and chemical

measurements were recorded at surface, mid-depth, and bottom at a point near the apex of the

barrier net: Water temperature (CO), dissolved oxygen (mg/l) , salinity (ppt) , and specific

conductance (p.mhos/cm (if) 250 C). In addition, a measurement of water clarity was recorded

through the use of a 22. 9 cm (9. in.) diameter Secchi disk

MBl1- 1o-96 1l:21amlh2461SI169-31S/cb.ap- Lawler, Matusky & Skelly Engineers LLP
3 ICHTHYOPLANKTON SAMPLE ANALYSIS

Inside and outside barrier net samples were analyzed separately. All ichthyoplankton (larvae)

were identified to the lowest practicable taxonomic level and counted. The life stage of the larvae

collected was designated, and a representative sample of each identified taxon and life stage was

measured for total length. Bay anchovy body depth measurements recorded initially for the 1993

net evaluation program were continued for the 1994 study period.

3.4 SCHEDULE OF EVENTS

The major events related to the deployment and evaluation of the BPGS fine mesh barrier net are

listed in chronological order below:

. 21-22 June: Nine wooden piles were installed around the BPGS cooling water

intake structure for attachment of the fine mesh barrier net. Installed piles are

shown in photograph 3-

. 22 June: Received NYSDEC collectors permit.

. 22 June: Initiated the Ichthyoplankton Monitoring Program which included

plankton net sampling at two Haverstraw Bay stations and one Bowline Pond

station on a three time per week sampling schedule.

. 8 July: Four inch trash pump brought to the site and the intake sampling system

set-up.

. 11-13 July: Deployment of the fine mesh barrier net. Divers used to attach the

cable between the pilings along the bottom and to attach the bottom of the net and

support lines. Net installation complete at 1300 hours on 13 July. Net deployment

shown in photograph 3-2. Deployed net shown in photograph 3-3. Schematic of

deployed net is given in Figure 3-4.

12 July: Initiated trash pump sampling at the BPGS cooling water intake and

plankton net sampling at stations located inside and outside the fine mesh barrier

net as part of the net evaluation program. The cooling water intake pump

sampling set-up is shown in photograph 3-4.

3-4

MB/1- 11-96 1:0Spmlb2461S/169-31S/cbap- Lawler, Matusky & Skelly Engineers LLP
Photo 3- 1. Fine mesh barrier net support piles. Photograph shows four piles located

on the south side, the apex pile, and one pile on the north side. Debris

boom is located around the outside of the piles.

Photo 3-2. Deploying the fine mesh barrier net.
15 It

BOWLINE POINT

SCREEN HOUSE

PLAN VIEW

,..... ...... .... ....

NET SECTION

, / / . / / / ... , /.,,,,;

1,. ./

f '

j:,:...,

Chain SIDE 

VIEW

Figure 3-4

Fine Mesh

Barrier Net Deployment

ORANGE & ROCKLAND UTILITIES, INC,

FINE MESH BARRIER NET STUDY

LAWLER, MATUSKY & SKEllY ENGINEERS UP

BAR.Ner dol Pearl River, New York

3-4C
25 July: First time that net sections were observed below the waters surface.

Biofouling growth (filamentous brown algae) noted on the net. Photograph 3-

shows submerged net along north side near apex.

. 28 July: Divers were brought in to clean the net in place with high pressure water

jets. Cleaning was not successful , fine sediment was removed from the net, but

the filamentous algae could not be cleaned from the net. Divers indicated that the

algal growth covered approximately 90% of the net, with equal coverage from

surface to bottom.

. 29 July: Following the unsuccessful attempt to clean the net in place, high

, pressure jet sprays were secured and placed on the work raft. The net section

between the south bulkhead and pile S 1 was released from the bottom and brought

to the surface for cleaning. Cleaning of the algae from the net was successful

(Photograph 3-6) when the net was clear of the water. During cleaning of the net

section, piles S3 and S4 snapped at or near the bottom. The net section between

pile S 1 and the south bulkhead was immediately released to reduce stress on the

remaining piles and to pass adequate cooling water. Adequate water passed

through the open net between pile S 1 and the south bulkhead that the remaining

sections of the net floated to the surface.

. 4 August: Fine mesh barrier net removed. Net removal is shown in photograph

7 and the biofouled net is shown piled on the work barge in photograph 3-

. 5 August: One set of ichthyoplankton samples (intake pump and plankton net

samples) were collected following complete removal of the fine mesh barrier net.

21 September: Divers removed the underwater cable and the wooden piles were

removed.

MB/l-lo-96 3:1Opm/h2461S/169-31S/cbap- Lawler, Matusky & Skelly Engineers LLP
Photo 3-5. Top of net submerged along north side near apex.

Photo 3-

Section of fine mesh barrier net showing

biofouling and area cleaned by high-pressure

spray-wash system.
Photo 3-7. Fine mesh barrier net being removed from the water.

Photo 3-8. Fine mesh barrier net piled on deck of work barge following removal.

Photograph shows extensive level of biofouling.
CHAPTER 4

PROGRAM RESULTS

1 WATER QUALITY INFORMATION

1 IchthyopIankton Monitoring Program

Plankton net sampling was conducted at two Haverstraw Bay stations (Haverstraw Bay

and Bowline Pond Inlet) and at a Bowline Pond station (Bowline Pond) to assist in

determining the presence and relative abundance of ichthyoplankton in the vicinity of the

Bowline Point Generating Station. Sampling under the Ichthyoplankton Abundance

Monitoring Program commenced on 22 June 1994. Water samples for the determination

of water temperature (DC), dissolved oxygen (mg/I), specific conductance ~mhos/cm (if)

25 DC), and salinity (parts per thousand , ppt) were collected from the surface, mid-depth

and bottom water strata at the Bowline Pond and one of the Haverstraw Bay stations

during each survey. In addition, water transparency readings using a 22. 9 cm (9. in.

Secchi disk were recorded at the time the water quality samples were collected.

Date average values for the water quality parameters recorded from the ichthyoplankton

abundance monitoring program are presented in Table 4- 1. All water quality values

recorded during the survey are presented in Attachment A.

In general , over the two and one-half week monitoring period , water temperature

gradually increased from an average daily value of 24. 3 DC recorded during 24 June to

26. 6 D recorded during 8 July. Dissolved oxygen exhibiting the typical inverse

relationship to water temperature, decreased gradually over the same time period going

from 8. 1 mg/l recorded during 22 June to 7. 1 mg/l recorded during 8 July. Specific

conductance and salinity decreased initially reaching the lowest values during 1 July, and

then increased to the sampling period high recorded during 8 July. The two values

indicate that some marine water was in the vicinity of the plant during the entire sampling

period. Water transparency was relatively good over the sampling period averaging 70.

, with a range of 48. 3 cm (29 June) to 95.0 cm (6 July).

MB/l-10-96 11:26am/h24618/169-318/chap-4/ Lawler, Matusky & Skelly Engineers LLP
TABLE 4-

ICHTHYPLANKTON ABUNDANCE MONITORING PROGRAM

WATER QUALITY INFORMATION

WATER QUALITY PARAMETER

SAMPLE WATER DISSOLVED SPECIFIC

DATE TEMPERA TURE OXYGEN CONDUCTANCE SALINITY TRANSPARENCY

(C') (mg/I) (umbos/em (fP 25 Co ) (ppt) (em)

22 JuDe 94 24. 3783 2.4 62.

24 June 94 24. 3597 65.4

27 June 94 25. 3474 62.

29 June 94 25. 2937 1.7 48.

1 July 94 25.4 2297 1.0 76.

6 July 94 26. 2297 1.3 95.

8 July 94 26. 4617 85.
1.2 Barrier Net Evaluation Program

The fine mesh barrier net evaluation program commenced with ichthyoplankton sampling

on 12 July and ended on 5 August. Water temperature, dissolved oxygen , specific

conductance, salinity, and water transparency data were recorded from the surface, middepth, and bottom water strata near the apex of the net twice during each plankton net

sampling date. Date average water quality information is presented in Table 4- , with

the complete listing of data presented in Attachment A.

Water temperature gradually increased during the study period with the highest value of

28. 6 oC recorded during 25 July, and the lowest value of 26. 6 oC recorded during 

July. Dissolved oxygen exhibited the inverse relationship to water temperature with the

highest value recorded on 13 July (8. 3 mg/I), and the lowest value recorded on 29 July

(6. 2 mg/l). Specific conductance and salinity were relatively stable over the four weeks

of evaluation sampling, with conductivity averaging 5380 JLmhos/cm (lJ) 25 oC and

ranging from 3775 to 6183 JLmhos/cm 

(jj) 

25 oC, and salinity averaging 3. 1 ppt with a

range from 2. 3 ppt recorded during 29 July to 3. 6 ppt recorded during 22 July. Water

transparency varied slightly over the study period ranging from 62.5 cm (13 July) to 93.

cm (20 July) and averaging 80.0 cm.

2 BOWLINE POINT GENERATING STATION UNIT OPERATION

BPGS circulating water pump operation and associated flow for the period 1 June through

31 August 1994 is presented in Table 4-3. During the period of fine mesh barrier net

deployment (11 July - 4 August), Bowline Point operated one generating unit (Unit No.

1) with two circulating water pumps. Daily plant flow was approximately 1.72 x1O6 m

(704. 2 cfs) during the net evaluation period. Assuming a fine mesh barrier net mesh

open area of 1 068 m2 (11 500 fr2), the average through mesh velocity (for a clean net)

at the start of the study period was calculated to be 1.87 cm/s (0.06 fps).

3 ICHTIIYOPLANKTON ABUNDANCE MONITORING PROGRAM

1 Inventory and Abundance of Taxa Collected

The taxonomic listing and number of ichthyoplankton collected during the seven dates

when sampling was conducted at the two Haverstraw Bay stations and at the Bowline

MB/I-10-96 11:26am/h24618/169-318/chap-4/ Lawler, Matusky & Skelly Engineers LLP
TABLE 4-

FINE MESH BARRIER NET EV ALUA TION PROGRAM

WATER QUALITY INFORMATION

WATER QUALITY PARAMETER

WATER DISSOLVED SPECIFIC

SAMPLE TEMPERATURE OXYGEN CONDUCTANCE SALINITY TRANSPARENCY

DATE (CO (mg/I) (umbos/em ~ 25 CO (ppt) (em)

12 July 94 26. 6000 3.4 70.

13 July . 27. 6050 62.

15 July 94 26. 7.4 5583 83.

18 July 94 27.4 4872 75.

20 July 94 28. 7.4 5883 93.

22 July 94 28.4 6183 81.0

25 July 94 28. 5200 77.

27 July 94 28.4 6.4 4925 72.

29 July 94 28. 3775 93.

5 August 94 28. 5327 92.

Date average of surface , mid-depth, and bottom values.
x = Operating circulating water pump

TABLE 4-3

BOWLINE POINT GENERATING STATION

CIRCULATING WATER PUMP OPERATION AND COOliNG WATER FLOW

FINE MESH BARRIER NET EVALUATION STUDY: 1994

OPERATING CIRCULATING WATER PUMP COOLING WATER FLOW

DATE Cubic Meters x 1D-'6) Gallonslx 1D-'6

1 June 94 722 455.040

2 June 94 562 412.560

3 June 94 567 414.035

4 June 94 611 161.330

5 June 94 570 1SO.516

6 June 94 102 291.019

7 June 94 401 370.080

8 June 94 401 370.080

9 June 94 401 370.080

10 June 94 816 215.598

11 June 94 440 118.324 12June94 0.477 126. 115

13 June 94 209 563.498

14 June 94 852 753.569 15June94 802 740. 160

18 June 94 871 758. 4SO

17 June 94 937 776.032

18 June 94 988 789.365

19 June 94 606 741.260

20 June 94 778 734.073

21 June 94 920 771.516

22 June 94 291 605.275

23 June 94 651 438.298

24 June 94 709 451.475

25 June 94 587 419. 407

26 June 94 999 528. 148

27 June 94 394 696.720

28 June 94 383 893.898

29 June 94 381 687.948

30 June 94 3.422 904.035

1 July 94 076 612.550

2 July 94 012 531.575

3 July 94 722 455.040

4 July 94 999 528.054

5 July 94 961 782.414

6 July 94 052 606.210 7 July 94 224 85 1 . 898

8July 94 417 902.764

9 July 94 445 910.080

10 Julv 94 554 674.720

11 July 94 722 455.040 12July94 898 448. 530

13 July 94 708 451.320

14 July 94 722 455.040

15 July 94 722 455. 040

18 July 94 722 455.040

17 July 94 722 455.040 18July94 722 455.040

19 July 94 722 455.040

20 July 94 722 455.040

21 July 94 722 455.040

22 July 94 722 455.040

23 July 94 748 481.681

24 July 94 722 455.040

25 July 94 722 455.040

26 July 94 722 455.040

27 July 94 722 455.040

28 July 94 722 455.040

29 July 94 722 455.040

30 July 94 722 455.040

31 July 94 722 455.040

1 August 94 722 455.040

2 August 94 722 455.040

3 August 94 722 455.040

4 Auoust 94 722 455.040

5 August 94 722 455.040

6 August 94 722 455.040

7 August 94 297 606.960

8 August 94 369 690. 168

9 August 94 832 484.065

10 August 94 722 455.040

11 August 94 722 455.040

12 August 94 722 455.040

13 August 94 722 455.040

14 August 94 722 455.040

15 August 94 722 455.040

16 August 94 722 455.040 17 August 94 722 455.040

18 August 94 722 455.040 19 August 94 722 455.040

20 August 94 645 487.415

21 August 94 404 699.489

22 August 94 001 792.659

23 August 94 932 774.505

24 August 94 394 896.716

25 August 94 293 605.615

26 August 94 722 455.040

27 August 94 722 455.040

28 August 94 722 455.040

29 August 94 722 455.040

30 August 94 722 455.040

31 August 94 722 455.040
Pond station under the ichthyoplankton abundance monitoring program stage of the fine

mesh barrier net evaluation program are presented in Table 4-4. Collection infonnation

for each sample is presented in Attachment B. total of six families and 2402

individuals were represented in the ichthyoplankton abundance monitoring program

samples. The greatest number of larvae were collected at the Bowline Pond Inlet station

(1657 individuals, 69.0% of the total), and the fewest number of larvae were collected

at the Bowline Pond station (214 individuals , 8. 9% of the total). A total of 531 larvae

were identified from the Haverstraw Bay station accounting for 22. 1 % of the total

number of larvae collected.

3~2 Ichthyoplankton Abundance and Concentration

The dominant taxonomic group identified was Morone spp. consisting of striped bass

(Morone saxatilis) and white perch (Morone americana). Striped bass larvae dominated

the Morone collections accounting for greater than 90% of the 1406 Morone larvae

collected. The greatest percentage of the Morone spp. larvae (1098 individuals, 78. 1 %

of the total) were collected during the first date (22 June) of the monitoring program

with the highest concentrations noted at the two Haverstraw Bay stations (1090

individuals, 99. 3 % of date total) (Table 4-5). Following the abundance peak recorded

during 22 June, the number of Morone spp. larvae declined dramatically, with only one

larvae identified from the last collection date - 8 July.

Bay anchovy (Anchoa mitchilli) (the target species for the barrier net evaluation

program), with 825 individuals (34. 3% of the total), was the second most abundant

ichthyoplankton taxon collected during the ichthyoplankton abundance monitoring

program (Table 4-4). The abundance of bay anchovy larvae increased over the

monitoring period with the highest numbers generally collected during the last sampling

date - 8 July (Table 4-6). Overall , higher concentrations were recorded from the

Haverstraw Bay stations (698 individuals, 84. 6% of the total) especially the Bowline Pond

Inlet station where 447 individuals or 54.2 % of the total were collected.

Hogchoker (Trinectes macula/us) (53 individuals , 2. 2 % of the total), and river herring

(Clupeidae) (29 individuals , 1. 2 % of the total) larvae ranked third and fourth in total

abundance, respectively. The relative abundance of hogchoker and river herring larvae

was low, with the greatest number of both taxa collected from Bowline Pond. The

greatest number of hogchoker (Table 4-7) larvae was collected during the last date of the

MB/I-IO-96 11:27am1h24618/169-318/cbap-4/ Lawler, Matusky & Skelly Engineers LLP
...

TABLE 4-4

ICHTHYOPLANKTON ABUNDANCE MONITORING PROGRAM

SPECIES INVENTORY AND ABUNDANCE

22 JUNE - 8 JULY 1994

ICHTHYOPLANKTON SPECIES INVENTORY NUMBER COLLECTED BY SAMPLING LOCATION

BOWLINE POND TOTAL

FAMILY SCIENTIFIC NAME COMMON NAME BOWLINE POND INLET HA VERSTRA W BAY COLLECTED

Alherinidae MenidialLabideuthes spp. Silversides

Clupeidae Alosa/Brevoortia spp. Herrings

Cyprinidae Notropis spp. Minnows

Engraulidae Anchoa mitchilli Bay anchovy 127 447 251 825

Percichthyidae Morone americana While perch

Morone sa:catilis Striped bass 1059 193 1272

Morone spp. Perch/Bass

Soleidae Trinectes maculatus Hogchoker

IchlhyoplanklOn Unidentified

Total IchlhyoplanklOn 214 1657 531 2402

Total Taxa

MonilOring program conducled using a m moulh diameler planklOn nel wilh 500 pm mesh.
TABLE 4-

ICHTHYOPLANKTON ABUNDANCE MONITORING PROGRAM

ABUNDANCE AND CONCENTRA nON OF MORONE SPP.

SAMPlE STATION

HAVERSTRAW BAY BOWLINE POND INLET BOWLINE POND

SAMPLE NUMBER 

ICONCENTRATION

NUMBER I CONCENTRATION NUMBER I

DATE COLLECTED No. 1000 m COLLECTED I CONCENTRATION No. 1000 m COLLECTED No. 1000 m

22 June 94 139 617. 951 41 97. 32.43

24 June 94 115. 163. 33.

27 June 94 68. 40.

29 June 94 119. 201.45 25.

1 July 94 209. 386.

6 July 94 16.

8 July 94

13 July 94

20 July 94

27 July 94

NS = No Sample
ichthyoplankton monitoring program while river herring (Table 4-8) larvae were more

abundant during the first sampling date.

3 Length-Frequency Information

Length-frequency information for the ichthyoplankton abundance monitoring program was

recorded for each sampling week based on a composite sample. In addition, for each

week of the barrier net evaluation program, length frequency information for the Bowline

Pond Inlet station was maintained separately.

Length-frequency information for bay anchovy larvae from the ichthyoplankton

monitoring program is presented in Table 4-9. The length frequency data indicates

continuous recruitment of young larvae in the Haverstraw Bay section of the Hudson

River especially during the period 1-20 July. The length data also suggests two separate

spawning events in Haverstraw Bay or the passage of two separate cohorts through the

area during the 1994 evaluation period.

4.4 FINE MESH BARRIER NET EFFECTIVENESS MONITORING PROGRAM

4.4. 1 Inventory and Abundance of Taxa Collected

The listing of the ichthyoplankton taxa identified and their abundance by station for the

fine mesh barrier net evaluation program is presented in Table 4- 10. Collection

information by sample location and date is presented in Attachment B. A total of five

families were identified in the ichthyoplankton samples. The greatest number of larvae

were collected by the four-inch trash pump at the cooling water intake, and the lowest

number were collected by the 0.5 m plankton net at the inside barrier net station. Similar

numbers of larvae and taxa were recorded at the two stations located outside the barrier

net. The taxa and abundance collected at the Bowline Pond Inlet station during the

barrier net evaluation sampling period is presented in Table 4- 10 for comparison

purposes.

4-4

MB/I-IO-96 11:28am/h246181169-318/ch.ap4/ Lawler, Matusky & Skelly Engineers LLP
TABLE 4-

ICHTHYOPLANKTON ABUNDANCE MONITORING PROGRAM

ABUNDANCE AND CONCENTRATION OF BAY ANCHOVY

SAMPlE STATION

HAVERSTRAW BAY BOWLINE POND INLET BOWLINE POND

SAMPLE NUMBER I

I CONCENTRATION

NUMBER I CONCENTRATION NUMBER

) I CONCENTRATION DATE COLLECTED No. 1000 m COLLECTED No. 1000 m COLLECTED No. 1000 m

22 June 94 288. 123. 36.

24 June 94 43. 356. 8.48

27 June 94 18. 150. 15.

29 June 94 419. 107. 30.

1 July 94

6 July 94 45. 34. 38.

8 July 94 245. 266 1031.90 386.

13 July 94 741 2717.

20 July 94 139 548.

27 July 94

NS = No Sample

4-4A
TABLE 4-

ICHTIlYOPLANKTON ABUNDANCE MONITORING PROGRAM

ABUNDANCE AND CONCENTRATION OF HOGCHOKER

SAMPlE STATION

HAVERSTRAW BAY BOWLINE POND INLET BOWLINE POND

SAMPlE NUMBER I CONCENTRATION NUMBER I CONCENTRATION NUMBER I CONCENTRATION

DATE COLLECTED No. /1000 m COLLECTED No. /1000 m COLLECTED No. /1000 m

22 June

24 June

27 June

29 June

1 July 94

6 July 94

8 July 94 18. 42. 139.40

13 July 117.

20 July

27 July

NS = No Sample

4-4B
TABLE 4-

ICHTHYOPLANKTON ABUNDANCE MONITORING PROGRAM

ABUNDANCE AND CONCENTRATION OF CLUPEIDAE

SAMPlE STATION

HAVERSTRAW BAY BOWLINE POND INLET BOWLINE POND

SAMPlE NUMBER I

I CONCENTRATION

NUMBER I CONCENTRATION NUMBER I CONCENTRATION

DATE COLLECTED No, 1000 m COLLECTED No. 1000 m COLLECTED No. 1000 m

22 June 94 26. 32.

24 June 94 15. 12. 16.

27 June 94

29 June 94 4.48

1 July 94

6 July 94

8 July 94

13 July 94

20 July 94

27 July 94

NS = No Sample

4-4C
Table 4-

ICHTHYOPLANKTON ABUNDANCE MONITORING PROGRAM

BAY ANCHOVY LENGTH FREQUENCY INFORMATION

LENGTH SAMPLE DATE

INTERVAL

(mm) 24 JUN 1 JUL 8JUL 13 JUL 20 JUL 27 JUL

10.

10, 10.

10. 11,

11. 11.

11. 12.

12, 12.

12. 13.

13. 13.

13. 14.

14. 14.

14, 15,

15. 15,

15. 16.

16, 16.

16. 17.

17. 17.

17, 18.

18. 18.

18, 19.

19. 19.

19. 20,

20. 20.

20. 21.

TOTAL ANALYZED 100 100

TOTAL CAUGHT 200 168 457 741 139

MINIMUM LENGTH

MAXIMUM LENGTH 16. 20. 18. 16. 13. 11,

MEAN LENGTH 13. 10.

4-4D
.t:..

t'11

TABLE 4-

FINE MESH BARRIER NET EV ALVA TION PROGRAM

SPECIES INVENTORY AND ABVNDANCEBY LOCATION

NUMBER COLLECTED BY LOCATION

OUTSIDE BARRIER NET SAMPLING

INSIDE BARRIER NET SAMPLING STATIONS ST A TIQNS

INSIDE NORTH SOUTH BOWLINE

COOLING WATER PLANKTON PLANKTON PLANKTON POND

ICHTHYOPLANKTON SPECIES INVENTORY INTAKE PUMP NET NET NET INLET

Atherinidae MenidialLabideslhes spp Silversides

Menidia menidia Atlantic silverside

Engraulidae Anchoa milchilli Bay anchovy 509 335 300 882

Gobiidae Gobiosoma spp Goby

Perichlhyidae Morone saxalilis Slriped bass

Seleidae Trinecles maculalus Hogchoker

Ichthyoplanklon Unidentified

Total Larvae 578 395 339 927

Total Taxa
4.4. Ichthyoplankton Abundance and Concentration

The dominant taxon collected during the period of the fine mesh barrier evaluation

program was the bay anchovy with 1213 individuals accounting for 86. 3% of the total

larvae (1406 individuals) collected (Table 4- 10). Abundance and concentration of bay

anchovy larvae by sampling location is presented in Table 4- 11. The greatest number

and highest concentrations of bay anchovy larvae for the period prior to the deployment

of the fine mesh barrier net (12- 13 July) and for the deployment period (15-29 July) were

noted at the BPGS Unit 1 cooling water intake location. A total of (509 individuals

42.0% of bay anchovy total). Similar numbers and concentrations of bay anchovy larvae

were recorded at the two stations located outside of the barrier net both prior to and after

barrier net deployment.

The second most abundant taxon identified under the barrier net evaluation program was

the hogchoker (Table 4-10) with 146 individuals collected or 10.4 % of the total

ichthyoplankton. Abundance and concentration by sampling location is presented in

Table 4-12. Similar numbers and concentrations were collected at the BPGS intake

station and at the two stations located along the outside of the barrier net. Collection

similarities at the intake and outside stations were consistent prior to net deployment and

after the net deployment was complete.

4.4. 3 Length-Frequency Information

Length frequency infonnation for bay anchovy larvae collected inside barrier net (pump

and plankton net samples combined) sampling locations is presented in Table 4- , and

the length frequency information for bay anchovy larvae collected at sampling locations

outside of the barrier net (outside nonh and south stations combined) is presented in

Table 4-14. Length frequency information from each sampling location and date is

presented in Attachment C.

Generally very few larvae were collected by the plankton net sampling inside the barrier

net. There was no difference noted between the length of bay anchovy larvae collected

by the inside plankton net and by the intake pump sampler (Table 4-13). Mean length

of larvae consistently increased over the study period. Very few individuals collected

were categorized as post yolk-sac larvae or were in the length range where the fine mesh

barrier net would have the greatest exclusion potential.

MB/I-IO-96 11 :29am1h24618/169-318/chap-4/ Lawler, Matusky & Skelly Engineers LLP
TABLE 4-

FINE MESH BARRIER NET EV ALUA TION PROGRAM

ABUNDANCE AND CONCENTRATION OF BAY ANCHOVY

BARRIER NEI' OUI'SIDE BARRIER NEI' OUTSIDE

BOWLINE POINT INT AXE BARRIER NEI' INSIDE NORm so UfH

NUMBER I CONCENTRATION . NUMBER 

I CONCENTRATION

NUMBER I CONCENTRATION NUMBER , ~CONCENTRATION

DATE COlLECTED No./l000 m COlLECTED No./l000 m3 COlLECTED No./l000 m3 COlLECTED No.llOOO m3

12 July 94 106 3111.37 1974. 152 2774. 1231.03

13 July 94 1937. 105. S80. 90 1318.

111 . 3258. 852. 1416.

117.

15 July 94 1350. 36. 292. en 61.23

1144. 420. 406.

763.

18 July 94 675. 20. 43.

205. 100. 78.

146.

20 July 94 117.41 61.42 335. 560. 99

58. 182. 270.

29.

22 July 94 440 . 29 39. 37. 123.

264. 76. 55.

88.

25 July 94 205.47 70. 35.

410. 57. 49.

58.

rT July 94 58. 39. 37. 95.

117. 36.

29 July 94 29. 40. 17.

88. 79. 19.

29.

Augmt 94 234.
TABLE 4-

FINE MESH BARRIER NET EV ALUA TION PROGRAM

ABUNDANCE AND CONCENTRATION OF HOGCHOKER

BOWLINE POINT INT AXE BARRIDt NET INSIDE BARRIDt NET OUI'SIDE BARRIDt NET OUTSIDE

NORm soum

DATE NUMBER I CONCE'lTIlATION NUMBER I CONCE'lTIlATION NUMBER I CONCE'lTIlATION NUMBER I CONCE'lTIlATION

COLLECTED No. /1000 m3 COLLECTED No. /1000 m3 COLLECTED No. 1000 m3 COLLECTED No. 1000 m3

12 July 94 264. 582. 474. 144.

13 July 94 146. 175. 123. 19.

117. 89. 1 77. 08

29.

15 July 94 117. 36. 18.

88. 95. 73.

58.

18 July 94 43. 60. 87.

58. 20. 58.

20 July 94 58. 20.

29. 20. 41.59

22 July 94 18.88

29. 18.

25 July 94 35.

29.

ZI July 94

29 July 94 34.

5 AlJ8U!t 94
Table 4-13

BAY ANCHOVY LENGTH INTERVAL INFORMATION

PUMP SAMPLES AND PLANKTON NET SAMPLES COLLECTED INSIDE THE BARRIER NET - 1994

LENGTH SAMPLE DATE

INTERVAL

(MM) 12 JUL 13 JUL 15 JUL 18 JUL 20 JUL 22 JUL 25 JUL 27 JUL 29 JUL 5AUG

5-4.

1-4.

6-5.

6-6.

1-6.

6-7.

6-8.

1-8.

6-9.

6-10.

10. 10.

10. 6-11.

11. 11.

11.6-12.

12. 12.

12.6-13.

13. 13.

13.6-14.

14. 14.

14.6-15.

15. 15.

15.6-16.

16. 16.

16.6-17.

17. 17.

17.6-18.

TOTAL ANALYZED

TOTAL CAUGHT 167 184 112

MINIMUM LENGTH

MAXIMUM LENGTH 12. 12. 15. 12. 13. 13. 15. 12. 16. 14.

MEAN LENGTH 10.4 11. 11.
Table 4-

BAY ANCHOVY LENGTH INTERVAL INFORMATION

PLANKTON NET SAMPLES COLLECTED OUTSIDE THE BARRIER NET - 1994

LENGTH SAMPLE DATE

INTERVAL

(MM\ 12 JUL 13 JUL 15 JUL 18 JUL 20 JUL 22 JUL 25 JUL 27 JUL 29 JUL

5-4.

1-4.

6-B.

1-B.

10.

10. 10.

10. 11.

11. 11.

11. 12.

12. 12.

12. 13.

13. 13.

13. 14.

14. 14.

14. 15.

15. 15.

15. 16.

16. 16.

16. 17.

17. 17.

17. 18.

TOTAL ANALYZED 120

TOTAL CAUGHT 220 227

MINIMUM LENGTH 5.4

MAXIMUM LENGTH 12. 12. 10. 11. 13. 12. 12. 14.

MEAN LENGTH 7.4
Similar numbers and lengths of bay anchovy larvae were recorded at the two outside

barrier net plankton net sampling stations (Table 4-14). Mean lengths were consistent

among sampling dates ranging from 6.4 mm on 13 July to 9. 3 mm on 27 July. Yolk-sac

recruitment was noted fairly continuously over the two week study period.

The date average length of bay anchovy larvae collected outside of the deployed barrier

net were smaller than those collected inside the barrier net. The minimum lengths of

larvae collected inside and outside the fine mesh barrier net during the same sampling

date were similar, however, generally larvae with a larger maximum size were collected

at the inside locations compared to the outside locations on the same date.

4.4.4 Inside Barrier Net Velocity PronIes

Velocity profiles were conducted inside the deployed fine mesh barrier net on three dates

during the net evaluation program. The velocity profiles were scheduled at regular

intervals over the net deployment period to determine if decreasing net filtration as a

result of sediment clogging or biofouling could be determined. Velocity monitoring was

conducted during three dates with velocity recorded at one meter intervals from surface

to bottom at two locations; along the north side of the net between piles N-2 nd N- , and

along the south side of the net between piles S-2 and S-3. Velocity profile information

is presented in Table 4- 15.

The first monitoring date was 15 July which was two days following the completion of

fine mesh barrier net deployment. Velocities were similar by location averaging 2. 31 and

04 cm/s (0.076 and 0.067 fps) on the north and south sides respectively, with an

overall average of 2. 17 cm/s (0.07 fps). No substantial depth difference in velocity was

noted at either location. Velocity profiles were next recorded on 20 July at

approximately the same locations and water depths. The average water velocity for the

two locations was 2. 91 cm/s (0.095 fps), with north and south location averages of 3.

cm/s (0. 104 fps) and 2. 65 cmls (0.087 fps), respectively. The difference in velocity

noted between the two locations was primarily the result of lower surface velocities

recorded at the south side location possibly due to net clogging. By the third velocity

recording date 27 July the difference between the north and south side locations was more

pronounced; averaging 2. 36 cm/s (0.077 fps) on the north side , and 1.45 cm/s (0.048

fps) on the south side. The overall average velocity was 1.94 cm/s (0. 064 fps). During

MB/l-ll-96 3:34pm1h246181169-318/cbap-4/ Lawler, Matusky & Skelly Engineers LLP
4-6A

TABLE 4-15

FINE MESH BARRIER NET EVALUATION PROGRAM - 1994

INSIDE BARRIER NET VELOCITY PROFILES

DATE 15 J I UIV 1994

Station Recording

Depth Depth Velocity

Location Time (m) (m) (cmls)

Between Piles N-2 and N- 0915-0925 823

164

164

408

408

871

Between Piles S-2 and S- 0936-0945 164

164

164

621

164

975

DATE: 20 July 1994

Station Recording

Depth Depth Velocity

Location Time (m) (m) (cmls)

Between Piles N-2 and N- 1422-1432 597

871

408

597

621

896

Between Piles S-2 and S- 1412-1419 164

890

139

408

383

896

DATE: 27 July 1994

Station Recording

Depth Depth Velocity

Location Time (m) (m) (cmls)

Between Piles N-2 and N- 1553-1605 189

139

408

267

164

164

189

Between Piles S-2 and S- 1540-1551 164

433

164

975

975

975
monitoring on 27 July the lowest velocities were recorded at the bottom on the south side

with relatively high values recorded on the north side.

It should be noted that the Unit No. 1 circulating water pumps were operating during the

study period and these are located on the north side of the intake building, and that the

barrier net is slightly closer to the intake building on the north side compared to the south

side. The other interesting observation is that the field crew noted heavier biofouling

between the apex and the south bulkhead compared to between the apex and the north

bulkhead.

5 . BAY ANCHOVY BODY LENGTH TO BODY DEPTH RELATIONSHIP

Total body length and body depth measurements were recorded on 612 bay anchovy

larvae collected during the period 22 June through 5 August. The results of the

measurements is presented in Attachment D. The linear regression of total body length

versus body depth for bay anchovy collected during the 1994 fine mesh barrier net

evaluation program was determined to be:

Body Depth (BD) = 0. 05021L1.2OO89

The R squared value for the equation is 0. 85674. The regression equation developed for

bay anchovy larvae collected during 1994 from Haverstraw Bay and Bowline Pond

predicts that a larvae measuring 13.0 mm in total length would have a body depth of 1.

, and a larvae measuring 17.0 mm in total length would have a body depth of 1.5

mm. For bay anchovy larvae of the same length, a smaller body depth value is predicted

based on the 1994 study data compared to the predicted body depth value based on the

1993 study data.

MB/l-ll-96 3:34pmlh24618/169-318/cbap-4/ Lawler, Matusky & Skelly Engineers LLP
CHAPTER 5

DISCUSSION AND CONCLUSIONS

1 GENERAL PROGRAM DESCRIPTION

Orange and Rockland Utilities, Incorporated (ORU) contracted Uiwler, Matusky & Skelly

Engineers LLP (LMS) to conduct a seasonal ichthyoplankton monitoring program which

would be used to evaluate the effectiveness of a fine mesh barrier net deployed at the

cooling water intake of the Bowline Point Generating Station (BPGS). Barrier net

effectiveness would be determined by comparing bay anchovy larval abundances between

sampling stations located inside and outside of the deployed barrier net. The seasonal

monitoring program consisted of two study phases; Phase I termed the Ichthyoplankton

Abundance Monitoring Program, and Phase II termed the Barrier Net Evaluation

Program.

Under Phase I , plankton net sampling was conducted at two stations located in

Haverstraw Bay (Haverstraw Bay (HBJ and Bowline Pond Inlet (BPI)) offshore of the

BPGS , and at a station located in Bowline Pond (BP) -the source of BPGS condenser

cooling water - to determine the presence and general abundance of bay anchovy larvae

in the vicinity of BPGS. The ichthyoplankton abundance monitoring program was

incorporated into the barrier net evaluation program to assist in determining the period

of greatest bay anchovy abundance in the BPGS vicinity which would be used to initiate

the deployment of the fine mesh barrier net and the ichthyoplankton monitoring program

designed to determine barrier net effectiveness. During the abundance monitoring

program piles were installed in Bowline Pond around the BPGS cooling water intake

structure in preparation for the rapid deployment of the fine mesh barrier net when

ichthyoplankton abundance levels indicated.

Phase II incorporated ichthyoplankton sampling using 0.5 m mouth diameter plankton nets

and a four inch trash pump, with the sampling designed to yield information useful in

determining the effectiveness of the fine mesh barrier net at limiting the movement of

ichthyoplankton in the immediate vicinity of the BPGS cooling water intake structure.

In general , following deployment of the fine mesh barrier net, plankton samples were

collected at two stations located outside of the barrier net and at two stations located

MB/I-IO-96 11:43am1b24618/169-318/cbAp-5/ Lawler, Matusky & Skelly Engineers LLP
inside of the barrier net, with net effectiveness related to comparing the collection

information between the two locations.

2 DISCUSSION OF PROGRAM RESULTS

1 Ichthyoplankton Abundance Monitoring Program

The ichthyoplankton abundance monitoring program commenced on 22 June 1994, the

date when LMS received its collection permit from the NYSDEC. Abundance

monitoring was conducted during seven dates with a total of 27 composite samples

collected (composite of surface and bottom lO-min plankton net tows). A total of 2402

larvae were collected , with Morone spp. (white perch , striped bass) the major taxa

identified accounting for 58.5 % (1406 individuals) of the total. The greatest percentage

of the Morone spp. larvae were collected during the first few sampling dates, with very

few recorded during the final days of sampling. Bay anchovy - the target species for the

fine mesh barrier net evaluation program - was the second most abundant taxon identified

in the monitoring program samples with 825 individuals or 34. 3 % of the total.

Overall, the abundance level of all larvae including bay anchovy was lower in Bowline

Pond compared to Haverstraw Bay, with the highest Haverstraw Bay ichthyoplankton

abundances recorded at the Bowline Pond Inlet station. For the bay anchovy larvae

similar trends in increasing abundance levels with time were recorded at both Haverstraw

Bay and the Bowline Pond stations. The average length of bay anchovy larvae during

the first week of abundance monitoring (22-24 June) was 9.4 mm (range 5. 3 - 16. 6 mm),

the average length increased to 13. 6 mm (range 5. 8 - 20.4 mm) during the second week

(27 June-l July) of abundance monitoring, and during the third week of monitoring, the

week immediately prior to deployment of the fine mesh barrier net, the average length

decreased to 6. 8 mm (range 3.4 - 18.2 mm) (5-8 July).

Water temperature gradually increased during the ichthyoplankton abundance monitoring

program ranging from 24. 3 to 26. 6 oc. Water temperature values were similar between

Bowline Pond and Haverstraw Bay during the first five sampling dates, however, during

the last two dates higher water temperatures were recorded in Bowline Pond compared

to Haverstraw Bay. Specific conductance and salinity readings indicated the presence of

marine waters in the study area during the entire monitoring program period. During the

first five days of the ichthyoplankton abundance monitoring program specific conductance

MB/I-IO-96 11 :49am1h24618/169-318/clap-S/ Lawler, Matusky & Skelly Engineers LLP
Ichthyoplankton sampling related to the fine mesh barrier net evaluation study

commenced on 12 July and continued through 5 August. Samples collected on 12 and

13 July were collected prior to the completion of barrier net installation, and the samples

collected on 5 August were collected the day following barrier net removal.

Ichthyoplankton samples were collected during a total of seven diurnal periods when the

fine mesh barrier net was in place. Over the ten sampling dates, a total of 72 composite

samples were collected - 26 intake pump samples, 10 inside barrier net plankton net

samples, and 36 outside barrier net plankton net samples. A total of 1406 larvae were

collected during the ten sampling dates, the dominant taxon collected was bay anchovy,

with' 1213 individuals representing 86. 3% of the total.

The average daily concentration of bay anchovy larvae inside the barrier net based on

pump and net samples were plotted (Figure 5- 1) to establish comparability. In general

the same trend in bay anchovy concentrations is indicated by the two sampling methods

however, the pump consistently indicates higher concentrations of larvae. Overall when

bay anchovy larval concentrations were relatively high - as noted during the first

sampling date - there was less difference between the two collection techniques, however

when larval concentrations were low the pump sampler was the more efficient sampling

device. No difference was noted in the daily average bay anchovy concentrations

determined for the outside barrier net north and south stations (Figure 5-2).

The greater concentration of bay anchovy larvae based on the pump samples could be

related to the difference in number of samples collected, but is more likely the result 

greater sampling efficiency associated with the pump. During the sampling dates when

the barrier net was not fully deployed (12 13 July and 5 August) similar concentrations

of bay anchovy larvae were noted at inside and outside locations , however, as noted

previously, the pump resulted in consistently higher values.

The average daily concentration of bay anchovy larvae collected outside of the barrier net

based on plankton net samples was compared to the average daily concentration of bay

anchovy larvae collected by the pump inside of the barrier net (Figure 5-3). Given the

short duration of the 1994 study period and the relatively low abundance of

ichthyoplankton in the vicinity of BPGS , the following conclusions can be made with

respect to the effectiveness of the fine mesh barrier net:

5-4

MB/I-IO-96 11:49am1h24618/169-318/chap-5/ Lawler, Matusky & Skelly Engineers LLP
~ 3000 

...................................................................................................,................................................................................,............................................

g 2500 

................... ...............................................................,...................................................................................................,..........................................

or-

~ 2000

~ 1500

a::

1000

500

3500 

Figure 5-

BAY ANCHOVY CONCENTRATION

INSIDE BARRIER NET STATIONS

............. ......................... ............................................................................................,.......................................................................................,,,.........................................................................................._................................................................................

12 Jul 13 Jul 15 Jul 18 Jul 20 Jul 22 Jul 25 Jul 27 Jul 29 Jul 5 Aug

SAMPLING DATE

PUMP---- NET 

5-4A
3000

.......

('f)

:

~ 2500

-r0 2000

1500

oe:(

000

() 500

Figure 5-

BAY ANCHOVY CONCENTRATION

OUTSIDE BARRIER NET STATIONS

............... .............................................................................................................................. .......................... ....... .. ...............................,.................................. ..................................................................................................................................................................................... ..........................................................

12 Jul 13 Jul 15 Jul 18 Jul 20 Jul 22 Jul 25 Jul 27 Jul 29 Jul 5 Aug

SAMPLING DATE

 

NORTH ---- SOUTH 

5-4B
3500

Figure 5-

BAY ANCHOVY AVERAGE CONCENTRATION

~ 3000 

.......... .......................................................................................................................................................................................................................

g 2500 

.........................................................................................................................................................

T""

~ 2000

1500

0::

rEi 1 

000

500

...... ................ ......................................................................................................................................................................................................

12 Jul 13 Jul 15 Jul 18 Jul 20 Jul 22 Jul 25 Jul 27 Jul 29 Jul 5 Aug

SAMPLING DATE

--- INSIDE

OUTSIDE 

5-4C
There was no difference in concentration of bay anchovy larvae between

inside and outside locations when the barrier net was not deployed or when

the deployment was not complete.

. The average daily concentration of bay anchovy larvae collected inside the

deployed barrier net was not significantly different from the average daily

concentration of bay anchovy larvae collected outside the barrier net.

. The relationship between bay anchovy larval concentrations based on intake

pump samples did not change over the duration of the barrier net evaluation

program to the concentration based on outside plankton net samples.

In general , the number of bay anchovy larvae present in the study area at the end of the

ichthyoplankton abundance monitoring program and during the first few days of the

barrier net evaluation program study period were sufficient to determine the effectiveness

of the fine mesh barrier net, however, the abundance of bay anchovy larvae decreased

rapidly following barrier net deployment severely limiting the ability to determine net

effectiveness. Net biofouling during 1994 , which limited the duration of the study

period, may also have contributed to the limited ability to detect barrier net effectiveness

since more larvae may have entered the study area following the first week of August.

3 CONCLUSIONS

The following conclusions can be reached with respect to the deployment of a fine mesh

barrier net in Bowline Pond and evaluation of the net as a means of limiting

ichthyoplankton entrainment in the Bowline Point Generating Station cooling water:

. A fine mesh barrier net (3. mm mesh) can be deployed around the

Bowline Point Generating Station cooling water intake structure without

limiting use of Bowline Pond and with no operating restrictions on BPGS

cooling water pump operation.

Fine sediment clogging and biofouling growth over time limit the water

filtration capacity of the net which effectively limits the duration the net can

be deployed without maintenance.

Fine sediment clogging of the mesh can be cleaned using high pressure

water jets with the net fully deployed. (NOTE: Underwater cleaning of

MB/l-4-96 3:37pmlh24618/169-318/chap-5/ Lawler, Matusky & Skelly Engineers LLP
the net requires divers and is very inefficient as to time and areal

coverage. Biofouling growth is not effectively cleaned with the net

deployed , but can be effectively removed with the net out of the water.

. The bay anchovy, based on dominance of the ichthyoplankton in the vicinity

of BPGS, was selected as the target species for the determination of the

effectiveness of the fine mesh barrier net. Overall bay anchovy abundance

levels recorded during 1993 and 1994 have been very low, and the period

during which the population is present in the BPGS vicinity has been of

. short duration. The low abundance levels and short period of presence in

the study area have limited the ability to determine the effectiveness of the

fine mesh barrier net.

5.4 RECOMMENDATIONS

. A regularly scheduled net maintenance program should be instituted

incorporating net removal and cleaning using high pressure water sprays.

Net maintenance should occur at approximately two week intervals.

Barrier net deployment should occur early during the ichthyoplankton

season in order to have sufficient numbers of ichthyoplankton upon which

to determine barrier net effectiveness. In addition , a comprehensive

sampling program should be undertaken, with similar sampling techniques

at inside and outside net locations , to adequately determine net

effectiveness.

Consideration should be given to dipping or treating the barrier net.

Dipping would result in greater protection from clogging and biofouling and

would also result in some reduction in the size of the mesh opening.

MB/l-4-96 3:37pm1h24618/169-318/chap-5/ Lawler, Matusky & Skelly Engineers LLP
REFERENCES

EA Science and Technology. 1989. 1987 annual report - entrainment abundance and

unit outage evaluation for Bowline Point Generating Station (Final). Report

prepared for Orange and Rockland Utilities, Inc. April 1989.

Hutchison , J.B. Jr. , and J.A. Matousek. 1988. Evaluation of a barrier net used to

mitigate fish impingement at a Hudson River power plant intake. Pages 200-285.

IN: Barnthouse, C. , R. J. Klauda, D. S. Vaughan and R. C. Kendall , eds.

American Fisheries Society Monograph 4: Science, Law, and Hudson River

Power Plants.

Lawler, Matusky & Skelly Engineers (LMS). 1992. Bowline Point fine mesh barrier

net evaluation study, progress report: June-September 1992. Progress report

submitted to Orange and Rockland Utilities, Inc. 7 October 1992.

Lawler, Matusky & Skelly Engineers (LMS). 1994. Effectiveness evaluation of a fine

mesh barrier net located at the cooling wa~er intake of the Bowline Point

Generating Station. Report prepared for Orange and Rockland Utilities , Inc.

April 1994.

Normandeau Associates. 1995. Bowline Point Generating Station 1994 impingement

studies. Report prepared for Orange and Rockland Utilities , Inc. June 1995.

MB/I- IO-96 1:09pmIh2461S/169-31S/Refs Lawler, Matusky & Skelly Engineers LLP
ATTACHMENT A

WATER QUALITY INFORMATION
BOWLINE POINT GENERATING STATION

Fine Mesh Barrier Net Evaluation Study - Water Quality Information - 1994

TEMPERATURE Disaolved Oxygen CONDUCTIVITY SAUNITY TRANSSTATION (degC) (mgII) (umhOll/cm!B!25 deg C) (wi) PARENCY

LOCATION DATE TIME DEPTH (em)

1301 Bowtlne Pond 6/22J94 15:29 26. 25. 24.6 24. 4100 4200 4400 2.5 2.7 2.9 75.

1302 Bowtlne Pond Inlet 6/22J94 17:00 25. 25. 24.7 24. 3400 3300 3300 2.0 2.0 2.1 50.

1303 Haveratraw Bay 6/22/94 17:16 28.

1304 Bowtlne Pond 6/24/94 09:28 30. 24.5 24. 24. 3800 4000 4100 2.4 2.5 2.7 66.

1305 Haverstraw Bay 6/24194 10:02 29.1306 Bowtlne Pond Inlet 6/24194 10:30 24. 24. 24. 24. 3200 3280 3200 2.0 2.0 2.0 64.1307 Bowtine Pond 6/27194 10:08 22. 24. 24.6 24. 3620 3650 3900 2.2 2.5 62.21308 Bowtine Pond Inlet 6/27194 11:17 24. 25. 25.6 25. 3080 3320 3450 2.01309 Haverstraw Bay 6/27194 11:55 24. 25. 25.6 25. 3080 3320 3450 2.5 2.01310 Bowtlne Pond 6/29194 09:28 30. 25. 25. 24. 3100 3200 3950 2.0 2.4 45.1311 Bowtine Pond Inlet 6/29194 10:07 25.1312 Haverstraw Bay 6/29194 10:44 25. 25. 25.0 24. 2400 2450 2520 50.

1313 Bowtine Pond 7/01194 09:25 20. 25. 25. 24. 2140 2190 2500 76.1314 Bowtlne Pond Inlet 7/01194 11:02 23.1315 Haverstraw Bay 7/01194 11:36 25. 25. 26.0 24. 1190 1270 1310

1316 Haverstraw Bay 7/06194 10:09 30.1317 Bowtlne Pond Inlet 7/06/94 10:24 25. 26.0 25.9 25. 2190 2300 2350 106.

1318 Bowtlne Pond 7/06194 12:34 25. 26. 26.3 25. 2090 2350 2500 64.

1319 Haverstraw Bay 7/08194 08:17 30.1320 Bowtlne Pond Inlet 7/08194 08:48 28. 26. 26.3 25. 4800 5100 6200 79.

1321 Bowtlne Pond 7/08/94 09:50 36. 27. 26.9 26. 3600 3690 4110 2.3 2.8 91.

1322 Bowtlne as Unit 1 7/12/94 08:52 25.1323 Barrier Net Outside/SOuth 7/12/94 13:46 30.1324 BarrIer Net Outside/North 7/12/94 14:02 24. 27.3 26.5 26. 6000 6000 6000 70.1325 Barrier Net Inalde 7/12/94 14:40 25.

1326 Bowtlne as Unit 1 7/13194 08:25 25.1327 BarrIer Net Inalde 7/13/94 09:39 23.1328 Barrier Net Outalde/North 7/13194 09:56 25.1329 BarrIer Net Outalde/SOuth 7/13194 10:09 27.0 26.5 26. 6000 6000 6100 62.0

1330 Bowtlne Pond Inlet 7/13194 10:43 27.

1331 Bowtlne as Unit 1 7/13194 12:57 30.1332 Barrier Net OutsIde/North 7/13194 14:35 25.1333 BarrIer Net Outslde/South 7/13194 14:49 30. 28. 27. 27. 5600 8100 6300 63.

1334 Bowtlne as Unit 1 7/13194 16:07 36.

1335 Bowtine as Unit 1 7/15194 08:50 26.1336 BarrIer Net Inalde 7/15194 10:14 24.1337 BarrIer Net Outside/North 7/15194 10:31 23.1338 BarrIer Net OutaIde/South 7/15194 11:19 20. 26.5 26.5 26. 5900 5500 5600 92.

1339 Bowtlne as Unit 1 7/15/94 12:24

1340 Barrier Net Outside/North 7/15194 13:39 25.

1341 BarrIer Net OutsIde/SOuth 7/15194 13:52 24. 26. 26.6 26. 5500 5500 5500 74.

1342 Bowtlne as Unit 1 7/15194 14:37

1343 Bowtlne as Unit 1 7/18194 10:05 30.

1344 BarrIer Net Inside 7/18194 11:06 26.

1345 Barrier Net Outside/North 7/18194 11:23 24.

1346 Barrier Net Outslde/South 7/18194 11:39 28. 27. 27.5 27. 7.4 4650 4980 5200 2.0 77.

1347 Bowtlne as Unit 1 7/18194 12:511348 BarrIer Net Outslde/SOuth 7/18194 13:49 24.
BOWLINE POINT GENERATING STATION

Fine Mesh Barrier Net Evaluation Study - Water Quality Information - 1994

TEMPERATURE DIssolved Oxygen CONDUCTIVITY SALINITY TRANSSTATION (dug C) (mg/I) (umhoslcm(S)25 dug C) (wi) PARENCY

LOCATION DATE TIME DEPTH

1349 BarrIer Net Outside/North 7/18/94 14:01 26. 27. 27. 27. 4700 4780 4720 2.9 2.9 74.

1350 Bowtlne OS Unit 1 7/18/94 14:38 24.1351 Bowtlne OS Unit 1 7/20/94 09:27 28.

1352 BarrIer Net Inside 7/20/94 10:12 28.1353 BarrIer Net Outside/North 7/20/94 10:24 26.1354 BarrIer Net Outslde/South 7/20/94 10:39 30. 28. 27. 27. 6200 6500 5800 98.

1355 Bowtlne Pond Inlet 7/20/94 10:52 27.1356 Bowline OS Unit 1 7/20/94 12:25 25.

1357 BarrIer Net Outslde/South 7/20/94 13:26 25.

1358 BarrIer Net Outside/North 7/20/94 13:37 23. 28. 27. 27. 5500 5500 5800 89.

1359 Bowtlne OS Unit 1 7/20/94 15:10 22.1360 Bowtine OS Unit 1 7/22J94 09:11 28.1361 Barrier Net Inside 7/22J94 10:01 28.

1362 BarrIer Net Outside/North 7/22J94 10:12 25.

1363 BarrIer Net Outside/South 7/22J94 10:24 31. 28. 28. 28. 5800 6200 6500 80.

1364 Bowtine OS Unit 1 7/22J94 11:48 28.

1365 BarrIer Net Outslde/South 7/22J94 12:34 27.1366 BarrIer Net Outside/North 7/22194 12:45 29. 28. 28. 5900 6100 6600 82.0

1367 Bowtlne OS Unit 1 7/22J94 14:05 25.1368 Bowtine OS Unit 1 7/25/94 09:26 24.

1369 BarrIer Net Outside/North 7/25/94 10:23 26. 28. 28. 27. 5000 5000 5300 2.9 2.9 75.

1370 BarrIer Net OutsIde/South 7/25/94 10:38 26.1371 Bowtlne OS Unit 1 7/25/94 11:49 26.

1372 Barrier Net OutsIde/South 7/25/94 13:38 28.1373 BarrIer Net OutsIde/North 7/25/94 13:52 25. 29. 29. 28. 4900 5100 5900 2.7 2.9 79.

1374 BarrIer Net Inside 7/25/94 14:14 26.1375 Bowtlne OS Unit 1 7/25/94 15:31 25.1376 Bowtlne OS Unit 1 7/27/94 10:26 35.1377 BarrIer Net Outside/South 7/27/94 11:22 24. 28. 28. 27. 4800 4900 5000 2.6 2.8 2.9 68.

1378 BarrIer Net Outside/North 7/27/94 11:35 24.1379 Bowtlne Pond Inlet 7/27/94 11:50 25.1380 Bowtlne OS Unit 1 7/27/94 12:49 26.

1381 BarrIer Net OutsIde/South 7/27/94 14:45 30.1382 Barrier Net Outside/North 7/27/94 14:58 26. 29. 29. 27. 4800 4950 5100 2.9 77.0

1383 BarrIer Net Inside 7/27/94 15:19 28.1384 Bowtlne OS Unit 1 7/27/94 16:14 34.

1385 Bowtlne OS Unit 1 7/29/94 09:11 23.1386 BarrIer Net Inside 7/29/94 09:31 23.

1387 BarrIer Net OutsIde/North 7/29/94 11:08 24.

1386 Barrier Net OutsIde/South 7/29/94 11:20 23. 28. 27. 27. 3680 3720 3980 2.2 91.

1389 Bowtlne OS Unit 1 7/29/94 11:25 24.1390 BarrIer Net Outslde/South 7/29/94 12:55 29.1391 Barrier Net OutsIde/North 7/29/94 13:06 26. 29. 28. 27. 3800 3620 4050 2.0 2.1 2.5 95.

1392 Bowtlne OS Unit 1 7/29/94 13:50 26.

1393 Bowtlne OS Unit 1 8/05/94 11:05 28.1394 BarrIer Net Inside 8/05/94 12:04 28.1395 BarrIer Net Outslde/South 8/05194 12:13 30.1396 BarrIer Net Outside/North 8/05/94 12:23 25. 28. 28. 28. 4880 5500 5600 92.0
ATTACHMENT B

ICHTHYOPLANKTON COLLECTION INFORMATION

FINE MESH BARRIER NET EV ALUA TION PROGRAM

1994
ATTACHMENT Bl

ICHTHYOPLANKTON ABUNDANCE MONITORING PROGRAM

...
1/10/96 BOIoILINE POINT FINE MESH BARRIER NET EVALUATION PROGRAM

ICHTHYOPLANKTON MONITORING PROGRAM

Page

VOLUME

INVENTORY START SAMPLD NO. CONC.

ATE LOCATION NUMBER TIME (11 CCM4ON NAME COLLECTED ('/1000 

                         - - -  

6/22/94 Bowl ine Pond 1301 15:29 246.

BAY ANCHOVY 36.

CLUPEIDAE 32.

STRIPED BASS 28.

UNIDENTIFIED 12.

I4ORONE SPP.

. 6/22/94 Bowl ine Pond Inlet 1302 17:00 226.

STRIPED BASS 924 077.

BAY ANCHOVY 123.

WHITE PERCH 61. 79

I4ORONE SPP. 57.

CLUPEIDAE

S/22/94 Haverstraw Bay 1303 17:16 225.

STRIPED BASS 115 510.

BAY ANCHOVY 288.

I4ORONE SPP. 57.

WH I TE PERCH 48.

CLUPEIDAE 26.

6/24/94 Bowl ine Pond 1304 09:28 235.

CLUPEIDAE 16.

STR I PED BASS 16.

I4ORONE SPP. 12.

BAY ANCHOVY

WH I TE PERCH

SILVERSIDES

UNIDENTIFIED

6/24/94 Bowl ine Pond Inlet 1306 10:30 238.

BAY ANCHOVY 356.

UNIDENTIFIED 184.

STRIPED BASS 104.

I4ORONE SPP. 41.

WHITE PERCH 16.

CLUPEIDAE 12.

CYPRINIDAE

~/24/94 HBverstraw Bay 1305 10:02 251.4

STR I PED BASS 75.

BAY ANCHOVY 43.

UNIDENTIFIED 31.
1/10/96 BOWLINE POINT FINE MESH BARRIER NET EVALUATION PROGRAM

ICHTHYOPLANKTON MONITORING PROGRAM

Page

VOLlJ4E

INVENTORY START SAMPLD NO. CONC.

LOCATION NUMBER TIME C(JI4QII NAME COLLECTED (1/1000 

                          - - - 

'/24/94 Haverstraw Bay 1305 10:02 251.

MORONE SPP. 27.

CLUPEIDAE 15.

WH ITE PERCH 11.

~/27/94 Bowl ine Pond 1307 10:08 197.

STRIPED BASS 25.

BAY ANCHOVY 15.

WH I TE PERCH 15.

UNIDENTIFIED

6/27194 Bowl ine Pond Inlet 1308 11: 17 233.

BAY ANCHOVY 150.

STRIPED BASS 38.

UNIDENTIFIED 30.

WHITE PERCH 25.

MORONE SPP.

6/27/94 Haverstraw Bay 1309 11 :55 270.

BAY ANCHOVY 18.

UNIDENTIFIED

MORONE SPP.

6/29/94 Bowl ine Pond 1310 09:28 231.3

BAY ANCHOVY 30.

STRIPED BASS 17.

WH I TE PERCH

6/29/94 Bowl;ne Pond Inlet 1311 10:07 223.

STRIPED BASS 170.

BAY ANCHOVY 107.

WH I TE PERCH 31.

UNIDENTIFIED

CLUPE I DAE

SILVERSIDES

6/29/94 Haverstraw Bay 1312 10:44 217.

BAY ANCHOVY 419.

STR I PED BASS 101.38

UNIDENTIFIED 23.

WHITE PERCH 13.

HORONE SPP.
1/10/96 B~LINE POINT FINE MESH BARRIER NET EVALUATION PROGRAM

ICHTHYOPLANKTON MONITORING PROGRAM

Page

VOLUME

INVENTORY START SAMPLD NO. CONC.

LOCATION NUMBER TIME (11 CCH4ON NAME COLLECTED ('/1000 .

          .       .                                      

6129/94 Haverstraw Bay 1312 10:44 211.

1/01/94 Bowl ine Pond 1313 09:25 212.

BAY ANCHOVY

1/01/94 Bowl ine pond Inlet 1314 11 :02 204.

STRIPED BASS 303.

MORONE SPP. 58.

\lH lYE PERCH 24.

UNIDENTIFIED

BAY ANCHOVY

7/01/94 Haverstraw Bay 1315 11 :38 219.

STRIPED BASS 150.

MORONE SPP. 50.

UNIDENTI F I ED

\lH I TE PERCH

BAY ANCHOVY

CLUPEIDAE

7/06/94 Bowl ine Pond 1318 12:34 208.

BAY ANCHOVY 38.

1/06/94 Bowl ine Pond Inlet 1317 10:24 233.

BAY ANCHOVY 34.

HOGCHOKER

1/06/94 Haverstraw Bay 1316 10:09 239.

BAY ANCHOVY 45.

STRIPED BASS 16.

UNIDENTIFIED

7/08/94 Bowl ine Pond 1321 09:50 251.

BAY ANCHOVY 386.

HOGCHOKER 139.

UNIDENTIFIED 15.

7/08/94 Bowl ine Pond Inlet 1320 08:48 251.

BAY ANCHOVY 266 031.90

HOGCHOKER 42.
- /10/96 BOWLINE POINT FINE MESH BARRIER NET EVALUATION PROGRAM

ICHTHYOPLAN~TON MONITORING PROGRAM

Page

VOLUME

INVENTORY START SAMPLD NO. CONC.

LOCATION NUMBER TIME (1ft CCM4ON NAME COLLECTED ('/1000 m

                          - - - 

7/08/94 Bowl ine Pond Inlet 1320 08:48 257.

UNIDENTIFIED

STRI PED BASS

/08/94 Haverstraw Bay 1319 08:17 272.

BAY ANCHOVY

HOGCHOICER

SILVERSIDES

/13/94 Bowl ine Pond Inlet 1330 10:43 272.

BAY ANCHOVY 741

HOGCHOICER

UNIDENTIFIED

7/20/94 Bowl ine Pond Inlet 1355 10:52 253.

BAY ANCHOVY 139

HOGCHOICER

/27/94 Bowl ine Pond Inlet 1379 11 :50 274.

BAY ANCHOVY
ATTACHMENT B2

FINE MESH BARRIER NET EV ALVA TION PROGRAM
/11/96 BOJLlNE POINT FINE MESH BARRIER NET EVALUATION PROGRAM

ICHTHYOPLAN~TON MONITORING PROGRAM

Page

VOLUME

INVENTORY START SAMPLD NO. CONC.

LOCATION NUMBER TIME COMMON NAME COLLECTED (#/1000 .

- - - 

-------_u--

7/12/94 Bowl ine GS Unit 1 1322 08:52 34.

BAY ANCHOVY 106 111.37

HOGCHOKER 264.

(13/94 Bowl ine GS Unit 1 1326 08:25 34.

BAY ANCHOVY 937.

UNIDENTIFIED 146.

HOGCHOKER 146.

7/13/94 Bowl ine GS Unit 1 1331 12:57 34.

BAY ANCHOVY 111 258.

HOGCHOKER 117.

'13/94 Bowl ine GS Uni t 1 1334 16:07 34.

BAY ANCHOVY 117.

UNIDENTIFIED 58.

HOGCHOKER 29.

7/15/94 Bowl ine GS Unit 1 1335 08:50 34.

BAY ANCHOVY 350.

HOGCHOKER 117.

UNIDENTIFIED 88.

GOBIIDAE

1/15/94 Bowl ine GS Unit 1 1339 12:24 34.

BAY ANCHOVY 144.

HOGCHOKER 88.

UNIDENTIFIED 58.

/15/94 Bowl ine GS Unit 1 1342 14:37 34.

BAY ANCHOVY 763.

UNIDENTIFIED 58.

HOGCHO~ER 58.

7/18/94 Bowl ine GS Unit 1 1343 10:05 34.

BAY ANCHOVY 675.

UN I DENTI F I ED 205.

/18/94 Bowl ine GS Uni t 1 1347 12 :51 34.

BAY ANCHOVY 205.

UNIDENTIFIED 58.

HOGCHOKER 58.

:/18/94 Bowl ine GS Unit 1 1350 14:38 34.

BAY ANCHOVY 146.
'11/96 B~LINE POINT FINE MESH BARRIER NET EVALUATION PROGRAM

ICHTHYOPLANKTON MONITORING PROGRAM

Page

VOLUME

INVENTORY START SAMPLD NO. CONC.

LOCATION NUMBER TIME CCM4ON NAME COLLECTED ('/1000 

         .                                

/18/94 Bowl ine GS Uni t 1 1350 14:38 34.

UNIDENTIFIED 29.

20/94 Bowl ine GS Unit 1 1351 09:27 34.

BAY ANCHOVY 117.

HOGCHOICER 58.

GOBIIDAE 58.

:20/94 Bowline GS Unit 1 1356 12:25 34.

BAY ANCHOVY 58.

HOGCHOKER 29.

/20/94 Bowl ine GS Unit 1 1359 15: 10 34.

BAY ANCHOVY 29.

/22/94 Bowl ine GS Uni t 1 1360 09: 1 1 34.

BAY ANCHOVY 440.

7/22/94 Bowline GS Unit 1 1364 11 :48 34.

BAY ANCHOVY 264. 17

HOGCHOKER 29.

r 122/94 Bowline GS Unit 1 1367 14:05 34.

BAY ANCHOVY 88.

UNIDENTIFIED 29.

25/94 Bowl ine GS Unit 1 1368 09:26 34.

BAY ANCHOVY 205.

'25/94 Bowl ine GS Unit 1 1371 11 :49 34.

BAY ANCHOVY 410.

HOGCHOKER 29.

/25/94 Bowline GS Unit 1 1375 15 :31 34.

BAY ANCHOVY 58.

7/27194 Bowl ine GS Unit 1 1376 10:26 34.

BAY ANCHOVY 58.

1/27194 Bowl ine GS Unit 1 1380 12:49 34.

BAY ANCHOVY 117.

(27194 Bowl ine GS Unit 1 1384 16: 14 34.

UNIDENTIFIED 58.
1/11/96 BOWLINE POINT FINE MESH BARRIER NET EVALUATION PROGRAM

ICHTHYOPLANKTON MONITORING PROGRAM

Page

VOLUME

INVENTORY START SAMPLD NO. CONC.

~TE LOCATION NUMBER TIME COMMON NAME COLLECTED (1/1000 .

7/27/94 Bowline GS Unit 1 1384 16: 14 34.

1/29/94 Bowl ine GS Uni t 1 1385 09: 11 34.

STRIPED BASS 58.

BAY ANCHOVY 29.

7/29/94 Bowline GS Unit 1 1389 11 :25 34.

BAY ANCHOVY 88.

7/29/94 Bowl ine GS Uni t 1 1392 13:50 34.

BAY ANCHOVY 29.

UN I DENTI F I ED 29.

i/05/94 Bowline GS Unit 1 1393 11 :05 34.

BAY ANCHOVY 234.

UNIDENTIFIED 29.
/11/96 ~LINE POINT FINE MESH BARRIER NET EVAlUATION PROGRAM

ICHTHYOPLANKTON MONITORING PROGRAM

Page

VOLlJItE

INVENTORY START SAMPLD NO. CONC.

LOCATION NUMBER TIME C(M4ON NAME COLLECTED ('/1000 .

                                                     

7/12/94 Barrier Net Inside 1325 14:40 30.

BAY ANCHOVY 974.

HOGCHOKER 582.

/12/94 Berrier Net OUtside/North 1324 14:02 54.

BAY ANCHOVY 152 774.

HOGCHOKER 474.

7/12/94 Barrier Net OUtside/South 1323 13:46 55.

BAY ANCHOVY 231.03

HOGCHOKER 144.

/13/94 Barrier Net Inside 1327 09:39 28.

HOGCHOKER 175.

BAY ANCHOVY 105.

7/13/94 Barrier Net OUtside/North 1328 09:56 56.

BAY ANCHOVY 880.

HOGCHOKER 123.

7/13/94 Barrier Net OUtside/North 1332 14:35 44.

BAY ANCHOVY 852.

HOGCHOKER 89.

/13/94 Barrier Net OUtside/South 1329 10:09 50.

BAY ANCHOVY 318.

HOGCHOKER 19.

7113/94 Barrier Net OUtside/South 1333 14:49 50.

BAY ANCHOVY 416.

HOGCHOKER 177 .

UNIDENTIFIED 39.

'115/94 Barrier Net Inside 1336 10: 14 27.

BAY ANCHOVY 36.

HOGCHOKER 36.

7l15/94 Barrier Net OUtsidelNorth 1337 10:31 54.

BAY ANCHOVY 292.

UNIDENTIFIED 54.

HOGCHOKER 18.
i/11/96 ~LINE POINT FINE MESH BARRIER NET EVALUATION PROGRAM

ICHTHYOPLANKTON MONITORING PROGRAM

Page

VOLUME

INVENTORY START SAMPLD NO. CONC.

ITE LOCATION NUMBER TIME C(M4ON NAME COLLECTED ('/1000 .

---------_u

'/15/94 Barri er Net Outside/North 1340 13:39 52.

BAY ANCHOVY 420.

HOGCHOKER 95.

SI LVERSIDES 38.

(/15/94 Barr i er Net Outs ide/South 1338 11:19 49.

BAY ANCHOVY 61.23

"/15/94 Barrier Net OUtside/South 1341 13:52 54.

BAY ANCHOVY 406.

HOGCHOKER 73.

UNIDENTIFIED 36.

/18/94 Barrier Net Inside 1344 11 :06 23.

HOGCHOKER 43.

/18/94 Barrier Net Outside/North 1345 11:23 49.

HOGCHOKER 60.

BAY ANCHOVY 20.

7/18/94 Barrier Net OUtside/North 1349 14:01 49.

BAY ANCHOVY 100.

HOGCHOKER 20.

'/18/94 Barrier Net Outside/South 1346 11 :39 45.

HOGCHOKER 87.

BAY ANCHOVY 43.

/18/94 Barrier Net Outside/South 1348 13:49 51.

BAY ANCHOVY 78.

HOGCHOKER 58.

7/20/94 Barrier Net Inside 1352 10: 12 32.

BAY ANCHOVY 61.42

/20/94 Barrier Net Outside/North 1353 10:24 56.

BAY ANCHOVY 335.

ATLANTIC SILVERSIDE 17.

/20/94 Barrier Net Outside/North 1358 13:37 49.

BAY ANCHOVY 182.

HOGCHOKER 20.
1/11/96 BOWLINE POINT FINE MESH BARRIER NET EVALUATION PROGRAM

ICHTHYOPLANKTON MONITORING PROGRAM

Page

VOLlJtE

INVENTORY START SAMP LD NO. CONC.

ATE LOCATION NlMBER TIME CCM4ON NAME COlLECTED (#/1000 .

                                                        

..-------_u

7/20/94 Barr i er Net Outs ide/North 1358 13:37 49.

7/20/94 Barrier Net Outside/South 1354 10:39 49.

BAY ANCHOVY 560.

HOGC H OKE R 20.

7/20/94 Barrier Net Outside/South 1357 13:26 48.

BAY ANCHOVY 270.

HOGCHOKER 41.

7/22/94 Barrier Net Inside 1361 10:01 25.

BAY ANCHOVY 39.

7/22/94 Barrier Net Outside/North 1362 10: 12 53.

BAY ANCHOVY 37.

HOGCHOKER 18.

7/22/94 Barrier Net OUtside/North 1366 12:45 52.

BAY ANCHOVY 76.

UNIDENTI FlED 19.

7/22/94 Barrier Net OUtside/South 1363 10:24 48.

BAY ANCHOVY 123.

7/22/94 Barrier Net OUtside/South 1365 12:34 53.

BAY ANCHOVY 55.

HOGCHOKER 18.

7/25/94 Barrier Net Inside 1374 14: 14 24.

NO CATCH

7/25/94 Barrier Net OUtsidelNorth 1369 10:23 56.

BAY ANCHOVY 70.

HOGCHOKER 35.

ATLANTIC SILVERSIDE 35.

7125/94 Barr i er Net OUts ide/North 1373 13:52 51.9

BAY ANCHOVY 57.

7/25/94 Barrier Net Outside/South 1370 10:38 56.

BAY ANCHOVY 35.
1/11/96 BOWLINE POINT FINE MESH BARRIER NET EVALUATION PROGRAM

ICHTHYOPLANKTON MONITORING PROGRAM

Page

VOLUME

INVENTORY START SAMP LD

NO. CONt.

ATE LOCATION NUMBER TIME (11 CCM4ON NAME COLLECTED ('/1000 11

- - 

7125/94 Barrier Net OUtside/South 1372 13:38 60.

BAY ANCHOVY

49.

7127/94 Barrier Net Inside 1383 15:19 25.

BAY ANCHOVY

39.

7127194 Barrier Net OUtside/North 1378 11 :35 54.

BAY ANCHOVY

37.

7127/94 Barr i er Net OUts ide/North 13g2 14:58 55.

BAY ANCHOVY

36.

7/27/94 Barrier Net Outside/South 1377 11 :22 52.

BAY ANCHOVY

95.

7127/94 Barrier Net OUtside/South 1381 14:45 53.

NO CATCH

7/29/94 Barri er Net Ins ide 1386 09:31 28.

NO CATCH

7129/94 Barrier Net OUtside/North 1387 11:08 49.

BAY ANCHOVY

40.

7/29/94 Barrier Net Outside/North 1391 13:06 50.

BAY ANCHOVY

79.

7/29/94 Barrier Net OUtside/South 1388 11 :20 58.

HOGCHOKER

34.

BAY ANCHOVY

17.

7/29/94 Barrier Net Outside/South 1390 12:55 52.

BAY ANCHOVY

19.

8/05/94 Barrier Net Inside 1394 12:04 33.

NO CATCH

8/05/94 Barrier Net OUtside/North 1396 12:23 53.

NO CATCH
1/11/96 ~LINE POINT FINE MESH BARRIER NET EVALUATION PROGRAM

ICHTHYOPLANKTON MONITORING PROGRAM

INVENTORY START

lATE LOCATION NlJ4BER TIME

.                     

8/05/94 Barrier Net Outside/South 1395 12:13

VOLlJ4E

SAMP LD

(11 W4MON NAME

                            

52.

NO CATCH

NO.

COLLECTED

Page

CONC.

('/1000 .

 
ATTACHMENT C

LENGTH FREQUENCY INFORMATION

BY LOCATION AND DATE
BO'JLlNE POINT FINE MESH BARR I ER NET EVALUA T I ON PROGRAM

Bowl ine Pond Inlet

LENGTH FREQUENCY ANAL YSI S

BA Y ANCHOVY

S~le Date

Length (11m) 6/24/94 7/01/94 7/08/94 7113/94 7120/94 7/27/94

    

0(1.5

1.5 -

0 -

5 - 0 -

5 -

0 -

5 -

0 -

5 - 0 -

5 -

0 -

5 -

0 -

5 - 0 -

5 - 10.

10. 0 - 10.

10. 5 - 11.0

11. 0 - 11.5

11.5 - 12.

12. 0 - 12.

12. 5 - 13.

13. 0 - 13.

13. 5 - 14.

14. 0 - 14.

14. 5 - 15.

15. 0 - 15.

15. 5 - 16.

16. 0 - 16.

16. 5 - 17.

17. 0 - 17.

17. 5 - 18.

18. 0 - 18.

18. 5 - 19.

19. 0 - 19.

19. 5 - 20.

20. 0 - 20.

Min

Max 16. 20. 18. 16. 13. 11.5

Avg 13. 10.

100 100

. 
BOYLINE POINT FINE MESH BARRIER NET EVALUATION PROGRAM

Barrier Net Outside/North

LENGTH FREQUENCY ANAL YS I S

BA Y ANCHOVY

s~le Date

Length (11m) 7112/94 7113/94 7/15/94 7/18/94 7/20/94 7/22/94 7/25/94 7/27/94 7/29/94

0(1.

1.5 -

0 -

5 -

0 -

5 -

1.. 1..

1..

0 -

5 -

0 -

5 -

0 -

5 -

0 -

5 -

0 -

5 - 10.

10. 0 - 10.

10. 5 - 11.0

11.0 - 11.5

11.5 - 12.

12. 0 - 12.

12. 5 - 13.

Min

Max 12. 10. 10. 12. 11.6 11.1.

Avg

...
BO~LINE POINT FINE MESH BARRIER NET EVALUATION PROGRAM

Barr i er Net Outs ide/South

LENGTH FREQUENCY ANAL YS I S

BAY ANCHOVY

SarlfJle Date

Length (nm) 7/12/94 7/13/94 7/15/94 7/18/94 7/20/94 7/22/94 7125/94 7/27/94 7/29/94

     

0(1.

1.5 - 0 -

5 -

0 - 5 -

0 -

5 - 0 -

5 -

0 -

5 -

0 -

5 - 0 -

5 -

0 -

5 - 10.

10.0 - 10.

10.5 - 11.0

11. 0 - 11.5 11.5. 12.

12.0 - 12.

12. 5 - 13.

13. 0 - 13.

13. 5 - 14.

14. 0 - 14.

14. 5 - 15.

Min

Max 12. 11.5 11.6 13. 12. 12. 14.

Avg
BO\.Il1NE POINT FINE MESH BARR I ER NET EVALUA T ION PROGRAM

Bowl ;ne Pond Inlet

LENGTH FREQUENCY ANAL YSI S

BA Y ANCHOVY

Sa~le Date

Length (rnn) 6/24/94 7/01/94 7/08/94 7/13/94 7/20/94 7/27/94

     

.:1.5

5 -

0 -

5 - 0 -

5 - 0 -

5 -

0 -

5 -

0 -

5 -

0 -

5 -

0 -

5 -

0 -

5 - 10.

10. 0 - 10.

10. 5 - 11.

11. 11.

11.5 - 12.

12. 0 - 12.

12. 5 - 13.

13. 0 - 13.

13. 5 - 14.

14. 0 - 14.

14. 5 - 15.

15. 0 - 15.

15. 5 - 16.

16. 0 - 16.

16. 5 - 17.

17. 0 - 17.

17. 5 - 18.

18. 0 - 18.

18. 5 - 19.

19. 0 - 19.

19. 5 - 20.

20. 0 - 20.

M;n

Max 16. 20. 18. 16. 13. 11.5

Avg 13. 10.

100 100
BO\JLlNE POINT FINE MESH BARRIER NET EVALUATION PROGRAM

Bowline GS Unit 1

LENGT H FREQUENCY ANAL YS IS

BA Y ANCHOVY

S~le Date

Length (11m) 7/12/94 7/13/94 7115/94 7/18/94 7120/94 7/22/94 7/25/94 7127194 7129/94 8/05/94

        

.:1.

5 -

0 -

0 -

5 -

5 -

0 -

5 -

5 -

0 -

5 - 10.

10. 10.

10. 5 - 11.

11 . 0 - 11.5

11.5 - 12.

12. 0 - 12.

12. 5 - 13.

13. 0 - 13.

13. 14.

14. 0 - 14.

14. 15.

15. 0 - 15.

15. 5 - 16.

16. 0 - 16.

16. 17.

Min

Max 12. 12. 15. 12. 13. 13. 15. 12. 16. 14.

Avg 10. 11. 11.
Barrier Net Inside

LENGTH FREQUENCY ANAL YS I S

BA Y ANCHOVY

BOYLINE POINT FINE MESH BARRIER NET EVALUATION PROGRAM

Length (II1II)

.

Sall'pl e Date

7/12/94 7/13/94 7/15/94 7/20/94 7/27194

-:1.

1.5 -

0 -

5 -

0 -

5 -

0 -

5 -

0 -

5 - 0 -

5 -

0 -

0 -

5 -

5 - 10.

10. 10.

Min

Max 10.

Avg
ATTACHMENTD

FINE MESH BARRIER NET EV ALUA TION PROGRAM

BAY ANCHOVY BODY LENGTH - BODY DEPTH MEASUREMENTS

1994
B8y erd't:Nf. body IengIh - body dep1h relaUonsHp

BoMne Point Fme Mesh BarTler Net EVIW81ion Progam: 1994

LENGTH DEPTH LENGTH DEPTH LENGTH DEPTH LENGTH DEPTH LENGTH DEPTH LENGTH DEPTH

11. 10.

10.

10.

11.

10.

11. 12. 10.

12. 14.

10.

11.

10.

11. 1.2

11.

12. 11.

11.

16.

10.

11.

11.

14.

11.

10. 13.

16. 12.

14.

10. 11.

13.

16.

11. 10. 10.

10.

12.

10.

10. 10.

11. 10.

12.

10. 10.

11.

11.

11.

13.

11.

10.

12. 11.4

15. 1.6 13.

12. 11.

11.

10. 10.

12.

12. 10.

10.

11.

10.

12. 12.

10.

10.

10. 12.

11.

12. 10. 13.

11. 12.

11. 10.

13.

11.

12.

11. 10.

12.

10.

10. 11. 13.

10. 13. 11.

13. 13.

11. 12. 13.

10.

11. 12. 1.2

11. 11. 10.4 11.