# Appendix A

Living Resources

February 201 2Appen dix A, Yaquina ODMDS Evaluation / EA 

# Appendix A

Living Resources

Table of Contents

Plankton and Fish Larvae

................................ ................................ ................................ .............. A

- 3

Zooplankton

................................ ................................ ................................ .............................. A

- 3

Ichthyoplankton

................................ ................................ ................................ ........................ A

- 4

Benthic Invertebrates

................................ ................................ ................................ .................... A

- 5

Benthic Infaunal Studies by USACE and EPA (1984

- 1989)

................................ .................... A

- 5

Benthic Invertebrate Studies by USACE and EPA (1999

- 2000)

................................ .............. A

- 6

Benthic In vertebrate Studies by USACE and EPA (2002)

................................ ....................... A

- 7

Benthic Invertebrate Studies by EPA and USACE (2008)

................................ ....................... A

- 9

Fish and Epibenthic Invertebra te Species

................................ ................................ ................... A

- 20

August 2008 EPA Trawl Survey

................................ ................................ ............................. A

- 24

Threatened or Endangered Species

................................ ................................ ............................. A

- 29

Other Wildlife

................................ ................................ ................................ ............................. A

- 33

Commercial and Recreational Fisheries

- Economics

................................ ................................ A

- 34

Marine Reserves

................................ ................................ ................................ .......................... A

- 34

References

................................ ................................ ................................ ................................ ... A

- 35

LIST OF FIGURES

Figure A

- 1 June and August 2002. The Frequency of Occurrence of the Top Five Most

Abundant Species at the Stations within the Disposal Area (total of 4 stations sampled) and at

Stations in Non

- Disposal Areas (total of 6 stations sampled).

................................ .............. A

- 8

Figure A

- 2

. 2008 Sampling Stations at Proposed Yaquina ODMDS

................................ ....... A

- 10

Figure A

- 3

. Average Number of Individuals and Species in Disposal Area and Non

- Disposal

Areas

, June 2008

................................ ................................ ................................ ................. A

- 11

Figure A

- 4. Average Number of Individuals and Species in Disposal Area and Non

- Disposal

Areas, Aug 2008

................................ ................................ ................................ ................. A

- 1 5

Figure A

- 5

. Density of Benthic Invertebrates, June 2008 (number per m 2 

### )

............................. A

- 18

Figure A

- 6

. Density of Benthic Invertebrates, August 2008 (number per m 2 

### )

......................... A

- 19

Figure A

- 7

. Fishery Resources

................................ ................................ ................................ .. A

- 21

Figure A

- 8

. Commercial and Recreational Shellfish

................................ ................................ A

- 22

Figure A

- 9

. Commercial and Recreational Dungeness Crab

................................ .................... A

- 23

Figure A

- 10

. Trawl Locations at Yaquina Ocean Disposal Sites, August 2008

......................... A

- 26

Figure A

- 11

. Wildlife Resources

................................ ................................ ................................ A

- 33

`

LIST OF TABLES

Table A

- 1. Disposal Activities at North ODMDS Drop Zone Prior to Sampling

...................... A

- 10

Table A

- 2. Number of Benthic Species per Sampling Location, June 2008

.............................. A

- 12

Table A

- 3. Number of Benthic Individuals per Sampling Location, June 2008

........................ A

- 13

Table A

- 4. Number of Benthic Species per Sampling Location, August 2008

......................... A

- 16

Table A

- 5. Number of Benthic Individuals per Samplin g Location, August 2008

.................... A

- 17

Table A

- 6. Summary of Fish Data for Each Trawl Area, August 2008

................................ ..... A

- 27

Table A

- 7. Dungeness Crab Trawl D ata, August 2008

................................ .............................. A

- 28

Table A

- 8. Epibenthic Invertebrate Data, August 2008

................................ ............................. A

- 29

Table A

- 9. Threatened or Endangered Species that May Occur at North and South ODMDS

. A

- 30Appen dix A, Yaquina ODMDS Evaluation / EA 

### ATTACHMENT

A. Demersal Fish Data by Location , August 2008

B. 2011 Yaquina ODMDS BathymetryAppendix A, Yaquina ODMDS Evaluation / EA A

- 3 

# Appendix A

Living Resources

Information on aquatic resources offshore of Yaquina Bay was obta ined from published and

unpublished reports, peer

- reviewed literature, and personal communications. In addition, t he U.S.

Army Corps of Engineers (USACE) and/or U.S. Environmental Protection Agency ( EPA ) have

conducted f

ield sampling specifically related to dredge material disposal periodically since 1984 to

collect information on distribution and abundance of benth i c infauna. In 2008, in addition to benthic

in fauna l sampling, EPA co nducted benthic trawls to collect presence/absence information on

epibent hic invertebrates and benthic fish at the proposed Yaquina North and South ocean dredged

material disposal sites (ODMDS)

.



## P LANKTON AND 

## F ISH 

## L ARVAE



### Zooplankton

Published literature within the last decade have examined the zooplankton community dynamics off

the Oregon coast in relation to the physical oceanographic patterns of the California c urrent and the

localized nearshore upwelling. Keister and Peterson (2003) provided a discussion of the zooplankton

community found off the central Oregon c oast in the N ewport coastal area (along the Newport

hydrographic line) . They indicate that t he zooplankton community is influenced strongly by seasonal

variations in wind and current patterns. During late spring and summer, northwesterly winds set up

equatorward flow and coastal upwelling. Northwesterly winds dominate from April/May

- September;

periodic relaxations or southwesterly storms rapidly affect the hydrography of nearshore areas, but

offshore of about 30 k ilometers (km) , conditions are less variable. Boreal neritic copepods such as

Pseudocalanus mimus

, Calanus marshallae

, Centropages abdominalis

, Acartia longiremis , and

Acartia hudsonica dominate the coastal plankton during summer (Peterson and Miller 1977). In early

fall, winds reverse and upwelling ceases; during autumn and winter, winds are predominantly

southwesterly, the Davidson c urrent flows poleward and offshore surface waters are transported

onshore. In winter, the coastal zooplankton is populated by warm

- water species such as Mesocalanus

tenuicorni s

, Paracalanus parvus

, Ctenocalanus vanus

, Clausocalanus spp.

, Acartia tonsa

, and

Corycaeus anglicus (Peterson and Miller 1977).

Ressler et al

. (2005) studied the spatial distribution of euphausiid aggregations in Oregon and n orthern

California. Euphausi ids, particularly Euphausia pacific and Thysanoessa spinifera , are important prey

items for juvenile and adult salmonids, spiny dogfish, rockfishes, Pacific hake, seabirds, and marine

mammals. Seventeen east

- west transects were conducted; with the furthes t north transect off of

Newport, Oregon

, in water as shallow as 50 meters

. Euphausiids were not common in depths

shallower than 50 meters. The authors found that the distribution of euphausiid patches was not

uniform or random. They found that euphausii ds clustered in two locations, inshore of Heceta Bank

and off of Cape Blanco. The clusters were found to correlate with near

- surface chlorophyll. In

addition, the interaction of mesoscale circulation patterns, upwelling, shoaling bottom topo graphy, and

d iel vertical migration created these large patches. These findings indicate that the area proposed for

site designation is not likely an area where euphausiid s would concentrate , and hence not likely a

priority feeding grou nd for their pelagic predators.

Reese et al

. (2005) examined the community structure, spatial distribution patterns, and environmental

associations of near

- surface zooplankton in summer 2000. Near

- surface zooplankton are an important

food resource for the early life history stages of m any fish. Generally, zooplankton assemblages areAppendix A, Yaquina ODMDS Evaluation / EA A

- 4 

### affected by water temperature, nutrient concentration, and salinity. The authors sampled from

Newport , Oregon

, to n orthern California. The authors found that during August, higher zooplankton

concentratio ns are concentrated offshore whereas in June, zooplankton were concentrated more along

shore. In addition, near

- surface ( N euston net frame with a height of 0.3 meters was towed at the

surface) zooplankton concentration was relatively low compared to subsu rface estimates. The authors

believe this occurred because all of their sampling took place during the day when it is likely

zooplankton are found at deeper depths. In terms of species

, the authors found that the most common

groups of zooplankton in thei r tows were : crab megaloae, hyperiid amphipods, euphausiids, and

chaetognaths. For the zooplankton species captured, their distribution was most explained by sea

surface temperature. For the area sampled, the nearshore area off of Newport did not appear to have a

particularly high concentration of zooplankton (number of individuals per cubic meter) nor did that

area have high species richness for the sampling efforts in either June or August 2000.

Brodeur et al

. (2008) studied the spatial and trophic ov erlap of two dominant jellyfish and pelagic

finfish in August 2002 between Newport, Oregon and Northern California. They sampled as close to

shore as 3 nautical miles

. They found that in spring, pelagic fishes have a greater impact on plankton

population s whereas by late summer the opposite is true; jellyfish become the dominant zooplankton

consumer in the system consuming almost twice as much zooplankton production as forage fishes.



### Ichthyoplankton

Fish larvae are a transient member of the inshore coasta l plankton community. Their abundance and

distribution has been described by Richard son (1973), Richardson and Pearcy (1977), and Richardson

et al. (1980)

. In more recent studies, Auth and Brodeur (2006) examined the species composition,

distribution

, an d concentration of ichthyoplankton along the Newport h ydrographic line from 9 to 84

km ( central Oregon c oast ) to investigate annual, seasonal, vertical, and cross

- shelf variability. Larval

concentrations were also analyzed in relation to water temperature and salinity. The 281 samples

collected from five cruises between April and September in 2000 and 2002 yielded 4

, 944 fish larvae

comprising 72 taxa in 28 families. The dominant taxa collected were northern anchovy ( Engraulis

mordax ), slender sole ( Lyops etta exilis ), rockfish es ( Sebastes spp

. ), northern lampfish ( Stenobrachius

leucopsarus ), and blue lanternfish ( Tarletonbeania crenularis ). Total larval concentration increased

from 49.3 per 1000 cubic meters ( m 3 

### ) in 2000 to 72.0 per 1000 m 3 

### in 2002, with seasonal

concentrations highest in August 2000 (90.3 per 1000 m 3 

### ) and April 2002 (151.2 per 1000 m 3 

### ).

Relatively few larvae were found at depths greater than 100 m eters , while highest larval

concentrations generally occurred from depths of 0 to 50 m eters

. However, slender sole

concentrations were highest from depths of 50 to 100 m eters

. Larval diversity and concentration were

higher offshore (46

- 84 k m ) than in coastal areas (9

- 28 km)

. Highest concentrations were normally

found at an intermediate station 65 k m off the coast. Species designated as either coastal or offshore

species by previous studies were predominantly found in their respective shelf regions. With the

exception of slender sole , larval concentrations were positively correlated with tempe rature and

negatively correlated with salinity.

Auth et al. (2007) e xamined diel vertical distribution, concentration, and community structure of

ichthyoplankton from a single station 69 k ilometers off H e ceta Head on the central Oregon c oast. The

depth

- s tratified samples yielded 1

, 571 fish larvae from 20 taxa, representing 11 families, and 128 fish

eggs from 11 taxa within 9 families. Dominant larval taxa were rockfishes

, northern lampfish

, and

blue lanternfish. The dominant egg taxa were Pacific sardin e ( Sardinops sagax ), medusafish

( Icichthys lockingtoni ), Pacific viperfish ( Chauliodus macouni ) , and Pacific jack mackerel ( Trachurus

symmetricus ). Larval concentrations generally increase d from the surface to 50 m eters

, and then

decreased with depth. La rval concentrations were higher at night than during the day, and there was

evidence of larval diel vertical migration. Depth stratum was found to be the most important factorAppendix A, Yaquina ODMDS Evaluation / EA A

- 5 

### explaining variability in larval and egg concentrations. The authors noted tha t species composition,

assemblages, and dominant taxa were similar to those found in other studies conducted during the

summer off the central Oregon c oast (Richardson 1973; Richardson and Pearcy 1977; Brodeur et al.

1985; Auth and Brodeur 2006). T his sim ilarity provides evidence to support t he hypothesis of Auth

and Brodeur (2006) that past ichthyoplankton sampling along the Newport hydrographic line during

summer is representative of ichthyoplankton assemblages elsewhere along the Oregon c oast.

Both of the aforementioned studies were conducted further offshore than the proposed North and

South ODMDS but likely the findings in Auth and Brodeur (2 006 ) regarding the coastal areas (9 to 28

km) can be applied in terms of adults spawning mainly near the coast and the eggs and larvae get

carried offshore by surface flows associated with coastal upwelling. Coastal spawning fish include

osmerids (smelts) , sculpins, greenlings, and some flatfishes including butter sole, English sole, sand

sole. The authors result s corroborated other findings that there is a peak spring and fall spawning

seasons (high diversity of ichthyoplankton observed in April and September).



## B ENTHIC 

## I NVERTEBRATES

Benthic invertebrates play an important role in second ary productivity in nearsho re marine systems.

They are prey items for many demersal fishes , breakdown organic material, and act as key players in

bioturbation (mixing of sediment particles) of the top few centimeters of the seafloor.



### Benthic Infaunal Studies by USACE and EPA (1984

- 1989 )

Benthic infaunal studies were conducted within 3 nautical miles of Yaquina Bay in March 1984, May

1986, October 1989, May and September 1999

, and June and September 2000. Most of the studies

were done in conjunction with the ODMDS program

. In 1984

, 9 stations were sampled in the vicinity

of the I nterim Site to characterize the benthic resources. In 1986 and 1989

, 14 and 12 stations

, respectively

, were sampled to the west and north of the I nterim S ite to aid in establishing a new site.

In 1999, 17 stations were sampled that were further west and to the north and south of the previous

stations. In 2000, 20 stations were sampled to evaluate the proposed North and South ODMDS , which

were located further offshore than previous sampl ing

.

The inverteb ra te fauna collected during these studies were typical of the nearshore

, high

- energy

environment found along the Oregon coast. It was similar to the communities found near other

disposal sites along the Oregon coast, such as Coos Bay sites E and F, Rogue Ri ver, Siuslaw River and

Chetco River (Hancock et al. 198 1 ; USACE 1985, 1988 a,b ). The community was dominated by

highly mobile organisms that are adapted to a shifting sand environment. Dominant species and

groups include d gammaridean a m phipods, sand dolla rs ( Dendraster eccentricus ) , surface

- dwelling

gastropods ( Olivella spp .) and various species of polychaete worms.

Invertebrate diversity was fairly constant at comparable stations throughout the se studies with the

exception of one 1986 station south of th e Interim Site

. Because this station had a rocky and coarse

shell substrate , it had a more diverse and different species composition than the sandy substrate

stations. The dominant molluscs in the se studies w ere the carnivorous gastropod Olivella spp. Th ree

species of Olivella occur along the Oregon coast, two of which, O. biplicata and O.pycna, were

collected off Yaquina Bay. Both of these species were present in significant numbers during 1984,

1986 and 1989 studies.

Dominant species of gammaridean amphipods included Mandibulophoxus gilesi, Synchelidium

shoemakeri, and Psarnrnonyx longimerius. These amphipods are scavengers and feed primarily on

particles of organic debris found in the sediment. M. gilesi and another species, EohaustoriusAppendix A, Yaquina ODMDS Evaluation / EA A

- 6 

### sencillus

, showed a great deal of variability between stations and over time. Th e variability see n in

these studies appears normal w hen compared to other studies (Hancock et al., 1981; USACE 1985

, 1988 a,b )

.



### Benthic Invertebrate Studies by USACE and EPA (1999

- 2000)

Baseline studies for the North and South sites occurred in 1999 and 2000 followed by surveys in 2002

and in 2008 during the disposal season. These studies included bathymetry, sidescan sonar, benthic

grabs, and benthic trawl surveys. For the 1999 and 2000 surveys, the USACE took five replicate Gray

O’Hara boxcore samples from 17 and 18 stations

, respectively (Marine Taxonomic Services (2001).

These samples were taken wi thin and around the North and South Sites in May and September 1999

and June and Septembe r 2000. The stations discussed here are those that are within the North and

South Sites. The data gathered outside the designated sites are contained within Marine Taxonomic

Services 2001 and 2003 reports and will be used in future analyses of changes to s pecies abundance

and diversity within and outside the disposal sites.

North Site. The May and September 1999 and the June and September 2000 surveys were similar in

the number of species found at each sampling location. As for individual abundance, the M ay and

September 1999 survey and the June 2000 were similar in abundance while the September 2000

abundances were orders of magnitude greater. During the September 2000 survey, there appeared a

large recruitment of opportunistic short

- lived polychaetes, ( S piophanes bombyx and Megelona

sacculate ) into the North Site. The third most abundant species was the anthozoan, Halcampoides sp , a

species that had not previously been one of the 5 most abundant species at the sampling locations.

Otherwise, the other spec ies with the greatest abundances were polychaetes and a crustacean.

The benthic infaunal species found at the North Site sampling stations that had the greatest abundance

were the same in May 1999 (YQ1), September 1999 (YQ1), and June 2000 (YQ1). Howeve r, station

YQ24 in June 2000 only had one species (in the top 5), in common with the other stations mentioned

(the polychaete Nephtys caecoides ). In September 2000, when benthic infaunal abundance increased

greatly at both YQ1 and YQ24 sites, the infauna w as dominated by 3 species that had not been seen in

1999 or in June 2000 at YQ 1. These species were observed at YQ24 in June 2000 in the top 5 in the

prior 3 surveys (1 polychaete, 1 crustacean, and 1 anthozoan). It does appear that variation in species

a nd their abundance can be fairly site specific. At the two sampling stations in the North Site in June

2000, only 1 out of the 5 most abundant species were the same at both stations.

The 1999 and 2000 September surveys at the two stations within the Nort h site indicated that

dominant species (the polychaete Spiophanes bombys ) were the same at both stations. Another

polychaete (either Nephtys sp or Magelona sp .) was second most abundant . The third most abundant

species was either an anthozoan ( Halcampoi des sp. ) or a polychaete ( Notomastus sp ), and either

polychaetes or crustaceans filled out the rest of the top 5 most abundant species.

The dominant mollusc genus at the North Site was the carnivorous gastropod, Olivella

. Dendraster

excentricus , sand dol lar, was not found in high abundance at the North Site whereas they were a

dominant species at the stations in the South Site.

South Site. The May and September 1999 and the June and September 2000 surveys were similar in

the number of species found at ea ch sampling location. As for individual abundance, the May and

September 1999 survey and the June 2000 were similar in abundance while the September 2000

abundances were orders of magnitude greater. During the September 2000 survey, there a ppeared a

large recruitment of opportunistic short

- lived polychaetes, ( Spiophanes bombyx and Magelona

sacculate ). Another species which showed up in September 2000 in high abundances but was not atAppendix A, Yaquina ODMDS Evaluation / EA A

- 7 

### such levels was the anthozoan, Halcampoides sp . Otherwise, the other speci es with the greatest

abundance were polychaetes, a crustacean, and juvenile razor clams at one station.

The benthic infaunal species found at the South Site stations that had the greatest abundance were very

similar in May 1999, September 1999, and Jun e 2000. In September 2000, when benthic infaunal

abundance increased greatly at all stations, the infauna was dominated by 3 species that had not been

present at high abundance in 1999 or in June 2000. These species were the same top three most

abundant sp ecies at all 4 stations sampled in September 2000: Spiophanes bombyx, Magelona

sacculata (polychaetes), Halcampoides sp. (anthozoan).

In the May 1999, September 1999, and June 2000, the most abundant species was fairly consistent

between seasons and samp ling stations. Dendraster excentricus (sand dollar), Notomastus lineatus

(polychaete), Olivella pycna (gastropod), Nemerteinea sp. (ribbon worm), Nephtys caecoides

(polychaetes), and Eohaustorius sencillus (crustacean) dominated the top five most abundant species.

In general, the species abundance and diversity at each station was fairly representative of the

community structure at the other stations.

The large abundance increases of particular species at the both the North and South Sites in September

20 00 is postulated to have been attributed to upwelling on the Oregon coast (Marine Taxanomic

Services 2003). Magelona sacculate and Spiophanes bombyx are two species that show a marked

increase in the population densities in fall 2000. Most of this density increase was attributed to

juvenile recruitment.



### Benthic Invertebrate Studies by USACE and EPA (2002 )

In June and September 2002, the USACE sampled 10 stations within the d isposal area (4 stations) and

outside the disposal area (6 stations). They took 5 r eplicate 0.096m2 modified Gray

- O’Hara box cores

at each of the 10 stations (Marine Taxonomic Services 2003).

When looking at the five most abundant species at each station in the disposal area versus the non

disposal areas, it appears that many of those species which were most abundant at the non

- disposal

areas were also the most abundant species in the disposal area stations (Figure A

- 1) . In the non

disposal areas, there were 4 species (tube

- dwelling worm, polychaetes, juvenile razor clams, and

juvenile brittle stars) which were not found at the disposal stations. Conversely, there were 3 species

which were found at the disposal areas but were not found at the non

- disposal areas (polychaetes).

From the August 2002 sampling, the benthic infaunal assemblag es at the dis posal and non

- disposal

areas were dominated by 11 species (Figure A

- 1) . Eight of those eleven species were found at the

disposal and non

- disposal areas. Of the three species that were not found at both the disposal and non

disposal areas, the non

- disposal area had two polychaetes which were not found at the disposal area.

Conversely, the tube

- dwelling filter feeder (Phylum

- Phoronida) was found at the disposal area and

not at the non

- disposal areas.Appendix A, Yaquina ODMDS Evaluation / EA A

- 8 

### Figure A

- 1. June and August 2002. The F requency of O ccurrence of the T op F ive M

ost A bundant

S pecies at the S tations within the D isposal A rea (total of 4 stations sampled) and at S tations in N on

D isposal A reas (total of 6 stations sampled)

0 20 40 60 80 100 % of Stations 

## Frequency of Most Abundant Species at Disposal

and Non

- disposal Areas

(% Occurrence at Sampling Stations)

June 2002

Disposal area

0 20 40 60 80 100 % of Stations 

## Frequency of Most Abundant Species at Disposal

and Non

- disposal Areas

(% Occurrence at Sampling Stations)

Aug 2002

Disposal areaAppendix A, Yaquina ODMDS Evaluation / EA A

- 9 

### Benthic Invertebrate Studies by EPA and USACE (2 008)

The most recent study of benthic infauna in support of EPA and USACE proposed site designation at

Yaquina was conducted in June and August 2008 by the EPA. The sampling stations were selected

based on the previous sampling efforts in 1999, 2000, and 2002 (USACE and EPA 2011 ; Figure A

- 2 )

. In 2008, the USACE disposed of d redge material before and after sampling. The USACE disposed of

135,918 cubic yards (cy) of material at the North ODMDS drop zone over 18 days betwe en May 20 to

August 6 (Table A

- 1 )

. Thus, disposal of material occurred 10 days prior to the June 2008 sampling 1



### . For the August 2008 data, material was di s posed at the North S ite 19 days prior to sampling.

June 2008 Survey

The June 2008 survey was composed of 20 samples (18 samples plus two duplicate samples) that

generated 6,028 specimens (Marine Taxonomic Services 2009). The dominant species in the June

2008 data set include d the polychaetes Chaetozone nr . setosa

, Magelona sacculata

, Nephtys

caecoides, Onuphis iridescens

, Spio filicor nis, and Spiophanes bombyx ; the crustaceans Anchicolurus

occidentalis and Eohaustorius estuarius ; and the miscellaneous phylum nemertinea. The number of

polychaetes, specifically Spiophanes bombyx at a count of 3,313, far exceeded the number of other

indi vidual organisms. There were a total of 106 taxa of which 46 were polychaetes, 34 were

crustacean, 18 were mollusca, 3 were echinoderms, and 5 were miscellaneous groups . No Cancer

magister (Dungeness crab) larvae or juveniles were collected.

In terms of number of species and density of individuals per grab between the disposal area (also

referred to as the North ODMDS drop zone ) and non

- disposal areas , the disposal area had fewer

species (M = 25; SD = 2 ; n = 5 ) and a lower density of individuals (M= 118 individuals /grab ; 

### SD =

28) than at non

- disposal stations (M= 33 species ; SD = 8

, n=15; M= 3 62 individuals /grab ; SD = 197;

n=15 ( Figure A

- 3 and Table s A

- 2

, A

- 3). The species that differed the most between the disposal area

and non

- disposal areas was po lychaetes. Both the overall lower density of individuals and lower

density of polychaetes at the disposal area was expected because dredged material was deposited

during the week prior to the June sampling. Thus, these values can be considered to represe nt what

occurs to the species and number of individuals immediately after a disposal event. This would

indicate that the disposal action had an effect of lowering the number of benthic infaunal individuals,

at least immediately (10 days) after disposa l; the impact to the number of species after a disposal event

is less clear

.

1 June 2008 benthic grabs occurred on June 4 and 5. The August 2008 benthic grabs and trawl survey occurred

on August 25.Appendix A, Yaquina ODMDS Evaluation / EA A

- 10 

### Figure A

- 2 . 2008 Sampling Station s at Proposed Yaquina ODMDS

Source: USACE and EPA 2011.



### Table A

- 1 . Disposal Activities at North ODMDS Drop Zone Prio r to Sampling

Year Month Start

Day En d

Day # of

L oads Average cy

per L oad Total cy per

D isposal P eriod

2007 October 20 29 40 978 39,113

2008 May 20 25 38 966 36,707

2008 July 26 31 49 994 48,704

2008 August 1 6 52 971 50,507Appendix A, Yaquina ODMDS Evaluation / EA A

- 11 

### Figure A

- 3 . Average Numb er of Individuals and Species in Disposal Area and Non

- Disposal Areas

, June 2008

0 50 100 150 200 250 300 350 400 450 500

Disposal Area Non

- Disposal Areas Number of Individuals 

### Number of Individuals per Grab (Mean with 95% CI)

Disposal Area versus Non

- disposal Areas

June 2008

0 5 10 15 20 25 30 35 40

Disposal Area Non

- Disposal Areas Number of Species 

### Species Abundance per Grab (Mean with 95% CI)

Disposal Area versus Non

- disposal Areas



### June 2008Appendix A, Yaquina ODMDS Evaluation / EA A

- 12 

### Table A

- 2 . Number of Benthic Species per Sampling Location, June 2008

Station Polychaetes Molluscs Crustacea Nemertina Echinodermata Phoronid a Misc Spp

Richness Mean

Number of Species

North ODMDS Drop Site

YQ

- 28 7 3 11 1 1 0 0 23

25 YQ

- 23 9 3 11 1 1 1 0 26

YQ

- 24 8 3 13 1 0 0 0 25

YQ

- 24D 11 6 7 1 2 1 0 28

YQ

- 25 9 2 9 1 1 1 1 24

Background Stations

– Southern part of North ODMDS

YQ

- 0 2 13 5 11 1 0 1 0 31

34 YQ

- 02D 15 5 6 1 1 1 0 29

YQ

- 01 12 6 20 1 2 1 0 42

Background Stations

– South ODMDS

YQ

- 13 13 5 13 1 1 1 0 34

30 YQ

- 14 13 6 13 1 1 0 1 35

YQ

- 29 14 6 10 1 1 1 0 33

YQ

- 16 6 5 9 1 1 1 0 23

YQ

- 17 12 6 5 1 1 1 0 26

YQ

- 18 11 4 9 1 1 0 1 27

Background Stations

– Outside of Proposed ODMDSs

YQ

- 26 15 4 12 1 1 1 1 35

35 YQ

- 22 32 6 11 1 2 1 2 55

YQ

- 06 17 5 12 1 1 1 0 37

YQ

- 10 11 5 11 1 0 1 0 29

YQ

- 20 12 7 6 1 1 1 0 28

YQ

- 27 8 6 9 1 2 1 0 27Appendix A, Yaquina ODMDS Evaluation / EA A

- 13 

### Table A

- 3 . Number of Benthic Individuals per Sampling Location, June 2008

Station Polychaetes Molluscs Crustacea Nemertina Echinodermata Phoronida Misc Total # of

Individuals

per G rab Average # of

Individuals

per G rab # of

Individuals

per m 2 Mean

Number o f Individuals

North ODMDS Drop Site

YQ

- 28 39 4 24 10 3 0 0 80

118 800

1180 YQ

- 23 80 6 40 14 1 1 0 142 1420

YQ

- 24 28 5 49 43 0 0 0 125 1250

YQ

- 24D 38 16 21 65 3 1 0 144 1440

YQ

- 25 41 2 29 18 1 7 1 99 990

Background Stations

– Southern part of North ODMDS

YQ

- 02 438 8 41 26 0 1 0 514

388 5140

3880 YQ

- 02D 403 15 14 21 1 8 0 462 4620

YQ

- 01 69 13 93 6 4 2 0 187 1870

Background Stations

– South ODMDS

YQ

- 13 66 7 78 18 9 1 0 179

386 1790

3860 YQ

- 14 341 16 53 40 4 0 2 456 4560

YQ

- 29 372 16 37 32 2 3 0 462 4620

YQ

- 16 28 7 17 22 1 2 0 77 770

YQ

- 17 250 9 9 20 1 3 0 292 2920

YQ

- 18 748 41 32 25 1 0 2 849 8490

Background Stations

– Outside of Proposed ODMDSs

YQ

- 26 364 17 44 16 1 2 1 445

325 4450

3250 YQ

- 22 312 11 52 94 2 1 1 473 47 30

YQ

- 06 275 11 62 14 1 5 0 368 3680

YQ

- 10 72 7 25 13 0 1 0 118 1180

YQ

- 20 275 25 27 7 1 1 0 336 3360

YQ

- 27 132 9 16 49 3 1 0 210 2100Appendix A, Yaquina ODMDS Evaluation / EA A

- 14 

### August 2008 Survey

T he August 2008 survey was comp osed of 19 samples (18 samples plus one duplicate) th at generated

5

, 372 specimens (Marine Taxonomic Services 2009). The data show a high energy benthic

community structure. The dominant species in the data set include d the polychaetes Magelona

sacculata, Spio

filicornis and Spiophanes bombyx ; the mollusca S iliqua sp. juvenile (razor clam) ; th e

crustacea Anchicolurus occidentalis, Diastylopsis dawsoni and Photis sp. indeterminate; and the

miscellaneous phylum n emertinea. As in June, the count of Spiophanes bombyx exceeded the number

of other individual organ isms. There were a total of 98 taxa of which 45 were polychaetes, 29 were

crustacea

, 20 were mollusca, 2 were echinoderms, and 2 were miscellaneous groups . There were four

Dungeness crab larvae or juveniles collected

. Juvenile razor clams encountered d uring this study were

too immature to identify to the species level. No adult razor clams were collected because they live

deeper in the sediment than the grab sampler could penetrate.

In terms of number of species and density of individuals per grab bet ween the disposal area (also

referred to as the North ODMDS drop zone) and non

- disposal areas, the disposal area had fewer

species (M = 26; SD = 7; n = 4) and a lower density of individuals (M= 149 individuals /grab ; 

### SD =

55 ) than at non

- disposal stations (M= 33 species; SD = 5, n=15; M= 318 individuals /grab ; SD = 142;

n=15 ( Figure A

- 4 and Tables A

- 4

, A

- 5 ). This may indicate that the disposal action has an effect of

lowering the number of benthic infauna. As in June, there were fewer polychaetes at the disposal area

. Again, polychaetes were often the most numerous organisms, while molluscs, crustaceans and

nemerteans appear to be close to equally balanced among all sites.

Density of Benthic Invertebrates

For both June and August 2008, the density of benthic invertebrates generally increased from east to

west, from shallow to deeper waters (Figures A

- 3 and A

- 4). For both June and August , one exception

was sample YQ

- 20 (furthest west outside South ODMDS) , which had a lower density than the nearest

samp le to the east ( YQ

- 18 ). Sample YQ

- 18 ha d the greatest density of benthic invertebrates in June,

while YQ

- 22 (furthest west outside North ODMDS) ha d the greatest density in August.Appendix A, Yaquina ODMDS Evaluation / EA A

- 15 

### Figure A

- 4 . Average Number of Individuals and Species in Disposal Area and Non

- Disposal Areas,

Aug 2008

0 50 100 150 200 250 300 350 400 450

Disposal Area Non

- Disposal Areas Number of Individuals 

## Number of Individuals per Grab (Mean with 95%

CI)

Disposal Area versus Non

- disposal Areas

Aug 2008

0 5 10 15 20 25 30 35 40

Disposal Area Non Disposal Areas Number of species 

### Species Abundance per Grab (Mean with 95% CI)

Disposal Area versus Non

- disposal Areas

Aug 2008Appendix A, Yaquina ODMDS Evaluation / EA A

- 16 

### Table A

- 4 . Number of Benthic Species per Sampling Location, August 2008

Station Polychaetes Molluscs Crustacea Nemertina Echinodermata Phoronida Misc Spp

Richness Mean

Number of Species

N orth ODMDS Drop Site

YQ

- 28 7 5 8 0 1 0 0 21

26 YQ

- 23 10 6 8 0 1 1 0 26

YQ

- 24 12 9 13 0 1 1 0 36

YQ

- 25 7 4 9 1 1 0 0 22

Background Stations

– Southern part of North ODMDS

YQ

- 02 16 5 10 1 1 1 0 34

34 YQ

- QC1 15 5 9 1 1 1 0 32

YQ

- 01 14 4 15 1 1 1 0 36

Background Stations

– South ODMDS

YQ

- 13 11 3 9 1 1 1 1 27

32 YQ

- 14 15 4 14 0 1 1 0 35

YQ

- 29 14 7 13 1 1 1 0 37

YQ

- 16 10 5 7 1 1 1 1 26

YQ

- 17 14 9 12 0 1 1 0 37

YQ

- 18 12 5 11 2 1 0 1 32

Background Stations

– Outside of Proposed ODMDSs

YQ

- 26 11 2 8 1 1 1 0 24

33 YQ

- 22 22 4 7 1 1 1 0 36

YQ

- 06 18 6 13 1 1 1 0 40

YQ

- 10 12 7 14 1 1 1 0 36

YQ

- 20 15 8 5 1 1 1 0 31

YQ

- 27 11 6 12 1 1 1 0 32Appendix A, Yaquina ODMDS Evaluation / EA A

- 17 

### Table A

- 5 . Number of Benthic Individuals per Sampling Location, August 2008

Station Polychaetes Molluscs Crustacea Nemertina Echinodermata Phoronida Misc Total # of

Individuals Mean # of

Individuals

per m 2 Mean

Number of Individuals

North ODMDS Drop Site

YQ

- 28 37 18 46 11 0 0 0 112

149 1120

1490 YQ

- 23 151 14 23 14 0 1 0 2 03 2030

YQ

- 24 37 46 39 66 0 1 0 189 1890

YQ

- 25 36 21 31 2 2 0 0 92 920

Background Stations

– Southern part of North ODMDS

YQ

- 02 146 19 55 7 3 1 0 231

175 2310

1750 YQ

- QC1 92 12 33 9 3 2 0 151 1510

YQ

- 01 68 11 55 7 1 2 0 144 1440

Background Stations

– South ODMDS

YQ

- 13 99 13 28 18 3 2 1 164

335 1640

3350 YQ

- 14 192 36 43 25 0 1 0 297 2970

YQ

- 29 256 37 66 47 3 1 0 410 4100

YQ

- 16 169 8 30 20 1 2 1 231 2310

YQ

- 17 243 36 89 41 0 4 0 413 4130

YQ

- 18 362 25 87 14 4 0 1 493 4930

Back ground Stations

– Outside of Proposed ODMDSs

YQ

- 26 181 8 49 11 1 6 0 256

374 2560

3740 YQ

- 22 485 19 107 29 1 2 0 643 6430

YQ

- 06 193 37 85 17 2 3 0 337 3370

YQ

- 10 93 16 74 15 1 3 0 202 2020

YQ

- 20 296 42 35 18 1 1 0 393 3930

YQ

- 27 312 14 49 29 2 5 0 411 4110Appendix A, Yaquina ODMDS Evaluation / EA A

- 18 

### Figure A

- 5 . Density of Benthic Invertebrates, June 2008 (number per m 2 

### )

Source: USACE and EPA 2011.Appendix A, Yaquina ODMDS Evaluation / EA A

- 19 

### Figure A

- 6 . Density of Benthic Invertebrates, August 2008 (number per m 2 

### )

Source: USACE and EPA 2011.Appendix A, Yaquina ODMDS Evaluation / EA A

- 20 

### Summary

The benthic inf

aunal information collected by EPA and the USACE for the baseline studies in 1999

and 2000 and subsequent surveys of disposal and non

- disposal areas in 2002 and 2008 provide

snapshots of the infaunal community within and outside the disposal areas. The sur veys show that that

the species within and outside the disposal areas are typical inhabitants of sandy substrate at these

depths (112 to 152 feet). Even though EPA and the USACE have not conducted year

- round sampling,

the recent findings in OWET 2011 provi de insight into what may be found at these disposal sites

besides in June and September. They found that benthic invertebrates did not vary across seasons

which would indicate that the infaunal organisms that were found at the proposed disposal sites prior

to disposal and those that were found during the 2002 and 2008 sampling at non

- disposal locations are

likely typical of what benthic infaunal community structure is present year

- round. Based on the

benthic infaunal data in 2008, it appears that there may be a decrease in the number of individuals in

the benthos post

- disposal, however the number of species does not appear to be affected. In addition,

the e ffect appears to be localized to the dredge disposal site itself which is a discrete area each year.

Gi ven the continuation of prey resources at the Site post

- disposal and the relatively small area of

sandy substrate that disposal occurs on each year, i t is not likely the e ffect s on benthic infauna

translate into an adverse e ffect on prey resources for bent hic feeding fish or epibenthic invertebrates

.



## F ISH AND 

## E PIBENTHIC 

## I NVERTEBRATE 

## S PECIES

The nearshore area off Yaquina Bay supports a variety of pelagic and demersal fish species and

epibenthic invertebrate species

. Bottom habitats include sand, gravel, p ebbles, and rocky reefs. The

neritic reefs off Yaquina Bay are a unique feature of the coast and are associated with bull kelp

( Nereocystis leutkeana ) beds.

Pelagic fish species found in the nearshore ocean off of Yaquina River (Figure A

- 7 ) include

anadr omous salmonids such as coho salmon ( Oncorhynchus kisutch ), winter steelhead ( Oncorhynchus

mykiss ), and spring and fall Chinook salmon ( Oncorhynchus tshawytscha )

. Other pelagic species

include the Pacific herring ( Clupea harengus pallasi ) , northern anchov y ( Engraulis mordax ) , and surf

smelt ( Hypomesus pretiosus ).

Demersal fish species present in the nearshore area are mostly residents and include a number of

sculpins, sea perch

, and rockfish species associated rocky habitats, as well as flatfish species o ccurring

predominantly over open sandflats. Flatfish include English sole ( Parophrys vetulus ), sanddab

( Citharichthys sp .), and starry flounder ( Platichthys stellatus ). English sole and starry flounder, along

with the sand sole ( Psettichthys melanostictu s ), spawn in the inshore area in the summer and juveniles

of these, as well as other marine species, may rear in Yaquina Bay

.

The commercially and recreationally important epibenthic invertebrate species off of Yaquina Bay

include shellfish and Dungeness crab ( Cancer magister ) (Figure s A

- 8 and A

- 9 )

. Razor clam beds are

located north and south of the jett ies along the beach. Recruitment to the inshore beaches comes from

the subtidal spawning areas. Gaper clams are present in large numbers near the mouth and upriver in

the estuary proper. Cockles are also present in the intertidal areas near the base of the jetties. Piddock

clams occur in the sandstone outcroppings north of the estuary mouth.

Dungeness crab adults occur on sandflat habitat along the ent ire Oregon c oast. They spawn in

offshore areas and occur in the estuary when conditions are favorable in late summer and fall. T here

are currently no know n squid spawning areas offshore of Yaquina Bay.Appendix A, Yaquina ODMDS Evaluation / EA A

- 21 

### Figure A

- 7

. Fishery ResourcesAppendix A, Yaquina ODMDS Evaluation / EA A

- 22 

### Figure A

- 8

. Co mmercial and Recreational ShellfishAppendix A, Yaquina ODMDS Evaluation / EA A

- 23 

### Figure A

- 9

. Commercial and Recreational Dungeness CrabAppendix A, Yaquina ODMDS Evaluation / EA A

- 24 

### August 2008 EPA Trawl Survey

Seven trawl transects w ere conducted by EPA in August 2008 ( USACE and EPA 2011 ) to provide a

snapshot of the fish and epibenthi c invertebrates that are found at the North ODMDS, South ODMDS

(non

- disposal), and outsid e the proposed ODMDS (Figure A

- 10 ). The survey conducted two trawls at

the North ODMDS and baseline area, but conducted three trawls at the South ODMDS. For the

purp oses of this discussion, the last trawl at the South ODMDS is not included; however, the data can

be seen in the Attachment to this appendix. Disposal at the North ODMDS site occurred 18 days

between May and August, with the most recent disposal being 20 days prior to the trawl survey.

Information collected on each trawl included the number and relative age of demersal fish species;

number, sex and size of Dungeness crab, and the number and the species of epibenthic invertebrates

collected for each of the seven trawls.

In total, 840 epibenthic fish were caught and all species were typical for nearshore habitat of the

Oregon coast (Table A

- 6 and Attachment). The number of fish collected per trawl ranged from 95

individuals in the North ODMDS to 177 indivi duals (outside of ODMDS). The number of species

ranged from 8 species (South ODMDS) to 15 species (outside of ODMDS). Overall, the number of

fish collected from North ODMDS trawls (146 and 95 individuals, respectively) were comparable to

the number of fi sh collected from baseline trawls (104, 156, 83, 158, and 177 individuals). The

number of species collected at North ODMDS trawls (10 and 10 species, respectively) also was

comparable the other trawl sites (8, 10, 9, 11, and 15 species). The percent of t he total catch was

highest north of the North ODMDS site at 17 and 19%. The North ODMDS trawls pulled in 16% and

10% of the total catch, while the trawls in the South ODMDS pulled in 9%, 11%, and 17% of the total

catch.

With regards to average abundance of fish per trawl, trawl YQB

- 05 (north of the North ODMDS) had

the greatest number of individual fish collected during each trawl (158 and 177 individuals) with an

average of 168 fish per trawl. These trawls also caught the greatest number of species (11 and 15

species). The trawls within the North ODMDS averaged 121 individual fish per trawl (146 and 95,

respectively). The trawls at the South ODMDS site averaged 130 fish per trawl (104 and 156

individuals, respectively). The number of species per area did not appear to differ substantially with

the range of species from 8 to 15 species (South ODMDS and north of North ODMDS).

The fish species found during this survey likely represent the fish that are present at the Site during the

summer, and not thro ughout the entire year (OWET 2011). This survey also found that high densities

of flatfish characterized the summer trawls while flatfish densities were significantly lower in October.

The most abundant species of benthic fish which were caught in the OWET study were similar to the

fish species that dominated the catch in the EPA 2008 trawls. Overall, the OWET 2010 study provides

additional data that EPA and the USACE can use as baseline and reference stations for future studies

because of sampling conducte d at the same depth and grain size.

Juvenile Fish

Juvenile fish w ere caught in all the trawls. Of all the identifiable fish caught, 75% were juveniles.

North of the North ODMDS, 13 of the 17 (76%) species caught had at least one juvenile individual in

the catch. In the North ODMDS, 7 of the 15 species (47%) caught had at least one juvenile individual

collected in the survey. In the South ODMDS , 9 out of the 12 species (75%) caught had a least one

juvenile life history stage present. In terms of which species had the most juveniles present, butter

sole and English sole were in the top three for most juveniles present in each area. The third species

was either the Pacific tomcod ( n orth of North ODMDS) or Pacific sanddab (North ODMDS and SouthAppendix A, Yaquina ODMDS Evaluation / EA A

- 25 

### ODMDS). These numbers demonstrate the use of the site by juvenile benthic fish. Overall, it appears

that the North drop zone location does not likely support significantly different abundance of adult or

juvenile fish in comparison to comparable areas not used fo r dredge material disposal.Appendix A, Yaquina ODMDS Evaluation / EA A

- 26 

### Figure A

- 10

. Trawl Locations at Yaquina Ocean Disposal Sites, August 2008

Source: USACE and EPA 2011Appendix A, Yaquina ODMDS Evaluation / EA A

- 27 

### Table A

- 6

. Summary of Fish Data for Each Trawl Area , August 2008

Common Name North of North OD MDS North ODMDS South ODMDS

Adult Juvenile UD Adult Juvenile UD Adult Juvenile UD

Big skate 1 4 2 1 1

Butter sole 7 59 2 29 2 32

Curl fin 1

English sole 6 75 3 80 12 53

Ling cod 1

Pacific sanddab 6 22 27 41 59 5 1

Pacific staghorn

sculpin 6 2 1 2

Pacific tomcod 91 13 4

Petrale sole* 1 1 1 2

Pricklebreast

poacher 1

Rock sole 1

Sablefish 2

Sand sole 4 25 2 19 5 22

Showy snailfish 1 3

Sme lt

- unknown sp 1 6

Snailfish (marbled?) 1

Speckled sanddab 7 1

Spotted ratfish 1 1

Starry flounder 1 1 1

Tubenose poacher 1 4

Warty poacher 11 9 1 6

Unidentified sculpin 1

T otal 44 285 6 54 185 2 98 166 0

Total # Individuals

per Area 335 241 264

% of Total Catch 40 29 31

UD = Life stage undetermined



### Dungeness Crab

Dungeness crab data provides support for the trends see n in the demersal fish data, as expected, since

they were collected from the same trawls. The greatest number of crabs was collected from trawl s

north of the North ODMDS with totals of 17 and 30 crabs ( Table A

- 7 ). The North ODMDS trawls

had 6 and 9 adult crabs per trawl while the South ODMDS trawls c ollected 3, 5, and 6 adult crabs. No

female crabs were collected at the South ODMDS while only 1 was collected at the North ODMDS.

The trawls to the north of the North ODMDS collected the most female crabs (6 and 8 females).

T he percentage of legal male Dungeness crab (>5.75 inches) was highest in the trawls collected at the

South ODMDS. Although there was nearly the same number of legal males north of the North

ODMDS , they made up a smaller percentage of the overall catch than the percentage of legal m ales at

trawls in South ODMDS . Overall

, there was a total of 82 Dungeness crab collected of which 3 8 %

were legal males.Appendix A, Yaquina ODMDS Evaluation / EA A

- 28 

### Table A

- 7 . Dungeness Crab Trawl Data

, August 2008

+ Legally harvestable crabs are males greater than 5.75 in ches, approximately 14.7 cm (data collected in cm).

++ Percent legal males relative to the total number of crabs.

NA = Not available

Location North ODMDS South ODMDS Outside ODMDS

Total s Trawl YQB

- 01

N to S in

North ODMDS,

Western third YQB

- 02

S to N in

North ODMDS,

Eastern edge YQB

- 03

N to S in

South ODMDS,

Western third YQB

- 04

N to S in

South ODMDS,

Eastern third YQB

- 04

S to N in

South ODMDS,

Eastern third YQB

- 05

SW to NE

North of

North ODMDS YQB

- 05

N to S

North of

North ODMDS

Replicate 1 1 1 1 2 1 2

Crab Data No. Mean

Width No. Mean

Width No. Mean

Width No. Mean

Width No. Mean

Width No. Mean

Width No. Mean

Width

cm in cm in cm in cm in Cm in cm in cm in

Female Crabs 0 NA NA 1 14.5 5.7 1 15.2 6.0 0 NA NA 0 NA NA 6 12.4 4.9 8 12.6 4.9

Male Crabs 6 14.3 5.6 8 14.2 5.6 6 15.8 6.2 5 15.8 6.2 8 15.9 6.2 11 14.1 5.6 22 14.9 5.9

Total Crab Count 6 9 7 5 8 17 30 82

+ No. Legal Males 2 2 5 3 6 4 9 31

++ % Legal Males 33.3 22.2 71.4 60.0 75.0 23.5 30.0 37.8

Source: USACE and EPA 2011Appendix A, Yaquina ODMDS Evaluation / EA A

- 29 

### Epibenthic I nvertebrate s

The trawls collected 10 different types of epibenthic invertebrates with only Dungeness crab and

short

- spined pink star (Pi s aster brevispina) collected in all trawls (Table A

- 8 ). The most numerous

organisms were the Dungeness crab and sea nettles which were caught in the trawls north of the North

ODMDS. Average number of individuals per area that were caught puts the area north of the North

ODMDS with the most (47), followed by the South ODMDS (24) and then the North ODMDS (21).

Table A

- 8 . Epibenthic Invertebrate Data

, August 2008

Location North of North

ODMDS North ODMDS South ODMDS

Trawl YQB

- 05 YQB

- 01 YQB

- 02 YQB

- 03 YQB

- 04

Replicate 1 2 1 1 1 1 2

Common Name Latin Name

Clear jellyfish unknown 2 3 10 6

Crangon sp. 8 3 2 1

Dungeness crab Cancer magister 17 30 6 9 7 5 8

Flat mud star 2 1 5 1

Short

- spined pink star Pisaster

brevispina 4 1 5 10 4 2 10

Sunflower star Pycnop odia

helianthoides 1 2 3 5 3

Sand flea (adult) 1

Luidia sp. Luidia sp. 1

Sea nettles 24 3

Unidentified shrimp 1

Other 2 bits of

sponges

Total Individuals

per Trawl 56 37 20 21 19 25 27

Average # of

Individuals per A rea 47 21 24



## T HREATENED OR 

## E NDANGERED 

## S PECIES

There are 23 threatened or endangered species protected under the Endangered Species Act that may

occur in the nearshore area off of Yaquina Bay (Table A

- 9 )

. Some of these species have a greater

likeliho od of occurrence than others based on their life history characteristics. In addition, given that

the proposed site designation could be in perpetuity, the likelihood that they may occur at the site s is

greater and i s included in this discussion.

Salmon i ds

On February 11 , 2008, the NMFS listed the Oregon Coast coho salmon Evolutionarily Significant Unit

( ESU) as a threatened species under the Endangered Species Act [7 3 Federal Register (FR) 7 816]

. The listing includes all naturally spawned populations o f coho salmon in Oregon coastal streams south

of the Columbia River and north of Cape Blanco, including the Cow Creek [Oregon Department of

Fish and Wildlife stock #37 ] coho hatchery program. Critical habitat also was designated. Yaquina

Bay and River we re designated as critical habitat but ocean waters were not included in this

designation.Appendix A, Yaquina ODMDS Evaluation / EA A

- 30 

### Table A

- 9

. Threatened or Endangered Species that M ay Occur at North and South ODMDS

Species Listing Status Critical Habitat

Anadromous Fish

Oregon Coast Coho salmon

( Oncorhynchus kisutch ) T 6/20/08; 76 FR 35755 2/11/08; 73 FR 7816

Lower Columbia River Coho Salmon

( O. kisutch) T 8/15/11; 76 FR 50448 Not applicable

Lower Columbia River Chinook

( O. tshawytscha) T 8/15/11; 76 FR 50448 70 FR 52 630; 9/2/05

Upper Willamette River spring run Chinook

( O. tshawytscha) T 8/15/11; 76 FR 50448 70 FR 52630; 9/2/05

Snake River spring/summer run Chinook

( O. tshawytscha) T 8/15/11; 76 FR 50448 64 FR 57399; 10/25/99

Southern Green sturgeon

(Acipenser medi rostris) T 4/07/06; 71 FR 17757 10/09/09; 74 FR 52300

Eulachon ( Thaleichthys pacificus ) T 3/18/10; 75 FR 13012 10/20/11; 76 FR 65324

Marine Mammals

Eastern Steller sea lion

( Eumetopias jubatus ) T 5/5/1997; 63 FR 24345 8/ 27/93; 58 FR 45269

Blue whale ( Balaenoptera musculus ) E 12/02/70; 35 FR 18319 Not applicable

Fin whale ( Balaenoptera physalus ) E 12/02/70; 35 FR 18319 Not applicable

Humpback whale

( Megaptera novaeangliae ) E 12/02/70; 35 FR 18319 Not applicable

Southern Resident Killer whale

( Orcinu s orca ) E 11/18/05; 70 FR 69903 11/26/06; 71 FR 69054

Sei whale ( Balaenoptera borealis ) E 12/02/70; 35 FR 18319 Not applicable

Sperm whale ( Physeter macrocephalus ) E 12/02/70; 35 FR 18319 Not applicable

Marine Turtles

Green turtle ( Chelonia mydas )

Exc ludes Pacific Coast of Mexico & Florida ET 7/28/78; 43 FR 32800 9/02/98; 63 FR 46693

Leatherback turtle

( Dermochelys coriacea ) E 6/02/70 ; 39 FR 19320 3/23/79; 44 FR 17710

1/16/12; 77 FR 4170

Loggerhead turtle ( Caretta caretta ) T 7/28/78; 43 FR 32800 No t applicable

Olive ridley turtle

( Lepidochelys olivacea ) ET 7/28/78; 43 FR 32800 Not applicable

Birds

Marbled murrelet

(Brachyramphus marmoratus) T 10/01/92; 57 FR 45328 61 FR 26255; 05/24/1996

Short

- tailed albatross

(Phoebastria (=Diomedea) albatrus) E 06/02/70; 35 FR 8491 None designated

Western snowy plover

(Charadrius alexandrinus nivosus) T 03/05/93; 58 FR 12864 70 FR 56969; 09/29/2005

Northern spotted owl

(Strix occidentalis caurina) T 06/26/90; 55 FR 26114 57 FR 1796; 01/15/1992

Invertebrates

Oregon silverspot butterfly

(Speyeria zerene hippolyta) T 07/02/80; 45 FR 44935 45 FR 44935; 07/02/1980Appendix A, Yaquina ODMDS Evaluation / EA A

- 31 

### Coho are present in the Yaquina Bay offshore area as both adults and juveniles. Adults hold in the

offshore area prior to entering the estuary to m igrate up river to spawn. Juveniles rear in the nearshore

ocean area after migrating downstream and transitioning to saltwater. Upstream migration of adult

coho salmon ranges from August through November. Juvenile outmigration extends from April

through June and peaks in May.

In 2005, the Lower Columbia River c oho s almon ESU was listed as threatened and includes all

naturally spawned populations of coho in the Columbia River and its tributaries in Washington and

Oregon, from the mouth of the Columbia up to and including the Big White Salmon and Hood Rivers,

and includes the Willamette River to Willamette Falls, Oregon, as well as 25 artificial propagation

programs (70 FR 37160). While migrating individuals may utilize the coastal habitat off Yaquina Bay

for migratory purposes, they are likely to be further offshore than the proposed ODMDS

.

Several ESUs of Chinook salmon listed in 2005 (70 FR 37160) could potentially be in the ocean area

off of Yaquina Bay. These include the Lower Columbia River (threat ened), Upper Willamette River

spring

- run (threatened), Upper Columbia River spring

- run (endangered), Snake River spring/summer

run (threatened), and Snake River fall

- run (threatened). All of these ESUs have designated critical

habitat, but critical habita t does not include ocean waters. During their ocean life history residence

period, these species have been found off of Yaquina Bay (Weitkamp 20 09 ).

Eulachon

S outhern DPS Pacific eulachon was listed as threatened on May 17, 2010 ( 75 FR 13012) . Eulachon

(commonly called smelt, candlefish, or hooligan) are a small, anadromous fish from the eastern Pacific

Ocean. Eulachon typically spend 3 to 5 years in saltwater before returning to freshwater to spawn

from late winter through mid spring. They occur in n earshore ocean waters and to 1,000 feet (300

meters) in depth, except for the brief spawning runs into their natal (birth) streams. In the continental

U .S. , most eulachon originate in the Columbia Basin. Other areas in the U .S. where eulachon have

been d ocumented include Sacramento River, Russian River, Humboldt Bay and several nearby smaller

coastal rivers (e.g., Mad River), and the Klamath River in California; Rogue and Umpqua rivers in

Oregon; and infrequently in coastal rivers and tributaries to Puget Sound, Washington. Although

eulachon migrate along the coast, little is known about their use of nearshore and marine habitat. In

January 2011, critical habitat was proposed (76 FR 515) and does not include any ocean waters.

According to NMFS analysis supporting the ir listing, the most significant threat to eulachon and their

habitats are changes in ocean conditions due to climate change (75 FR 13018). Dredging was

identified as a low to moderate threat primarily due to spawning

- related impacts. Howev er, impacts

associated with dredged material disposal were not identified as a threat. Even though eulachon are

found in nearshore waters, the potential for eulachon to be in the area during disposal is low because :

( 1) eulachon are not known to use Yaqu ina Bay ; thus, large numbers of returning outmigrants or

adults are unlikely to be transiting through the North and South ODMDS; and ( 2) disposal actions

occur for a limited number of days per year

, which limits the likelihood (in combination with the

afor ementioned reasoning) of fish coming in contact with dredged material disposal.

Green Sturgeon

The Southern Distinct Population Segment (DPS) of green sturgeon w as listed as threatened on April

7, 2006 ( 7 1 FR 17757) . Critical habitat was designated for the species on October 9, 2009 (74 FR

52300). Green sturgeon that spawn to the north, primarily in the Klamath and Rogue rivers, constitute

the Northern DPS, which is not federally listed. The two sturgeon DPSs were established because

they were genetica lly distinct. According to NMFS analysis supporting the listing of the SouthernAppendix A, Yaquina ODMDS Evaluation / EA A

- 32 

### DPS of green sturgeon, “ T he principal factor for decline of the Southern DPS is the reduction of the

spawning area to a limited area of the Sacramento River” (71 FR 17762). T he nearest spawning

habitat is in the Sacramento River. Southern DPS green sturgeon likely occur at the proposed Yaquina

ODMDS as they migrate north and south to access estuaries during summer and early fall.

De signated critical habitat for southern gre en sturgeon includes a ll U.S. coastal marine waters out to

the 60 f athom depth bathymetry line from Monterey Bay, California north and east to include waters

in the Strait of Juan de Fuca, Washington, which encompasses the proposed ODMDS and a ll tidally

in fluenced areas of Yaquina Bay up to the elevation of mean higher high water

.

Marine Mammals

There are many whale and sea turtle species in Oregon’s offshore coastal area that are federally listed

under the Endangered Species Act. The blue

, fin

, sei

, spe rm

, humpback

, and southern resident killer

whale s are all federally endangered species and occur as migrants off the Oregon c oast in waters

typically farther from shore than within the proposed Yaquina ODMDS

.

Blue whales occur off the Oregon coast in May and June, as well as August through October. Blue

whales typically occur offshore as individuals or in small groups and winter well south of Oregon. Fin

whales also winter far south of Oregon and range off the coast during summer. Sei whales also winter

south of Oregon and probably occur in southward migration off the Oregon coast in late summer and

early fall. Sperm whales occur as migrants and some may summer off the Oregon coast; they forage

in waters much deeper than those in the nearshore area. Hu mpback whales primarily occur off the

Oregon coast from April to October with peak numbers from June through August. Humpback whales

are particularly concentrated in Oregon along the southern edge of Heceta Bank and are found

primarily on the continental shelf and slope. The range of the s outhern r esident killer whale during the

spring, summer, and fall includes the inland waterways of Puget Sound, Strait of Juan de Fuca, and

Southern Georgia Strait. Their occurrence in the coastal waters off Oregon has been documented.

Little is known about the ir winter movements and range.

Marine Turtles

The loggerhead

, green

, leatherback

, and olive r idley sea turtle s are all federally listed species and have

been recorded from strandings along the Oregon and Washing ton coasts. The occurrence of sea turtles

off the Oregon coast is associated with the appearance of albacore and jellyfish . Albacore occurrence

is strongly associated with the warm waters of the Japanese current. Because these warm waters

generally occu r 30 to 60+ miles offshore from the Oregon coast, these sea turtle species do not

typically occur in the nearshore area. However, because of food resources (i.e, jellyfish) that do occur

closer to shore , NMFS designated critical habitat for the leatherbac k sea turtle off the coast of Oregon,

which includes the proposed North and South ODMDS.

Birds

Federally listed marine birds that may be present in the Yaquina Bay offshore area include the marbled

murrelet a nd short

- tailed albatross. Threatened marbled murrelets are observed in small flocks or as

individuals in the ocean throughout the year. The endangered short

- tailed albatross may forage in

open ocean areas off the coast. T he Pacific c oast population of western snowy plover is a federally

threatened species that breeds in coastal areas in California, Oregon and Washington. W estern snowy

plover breeding and feeding occur on beaches rather than in open water.Appendix A, Yaquina ODMDS Evaluation / EA A

- 33 

## O THER 

## W ILDLIFE

Wildlife resources in the vicinity of Yaquina Bay are shown in Figure A

- 9

. T hree species of seals and

sea lions inhabit the Yaquina Bay coastal area

. Steller sea lions , a federally threatened species, and

harbor seals ( Pusa vitulina ) are year

- long residents , while California sea lions ( Zalophus

californianus ) are present most of the year. Steller sea lions forage at river mouths and nearshore

areas along the Oregon c oast. The closest Steller sea lion haul out site is located about 7 miles south

of the Yaquina North Jetty (Seal Rock ). Harbor seals breed in the estuary and on nea rshore rocks.

The Yaquina nearshore area and shoreline provides habitat for shorebirds, waterfowl, herons, bald

eagles ( Haliaeetus leucocephalus ) , hawks, and many other species of birds. Pelagic birds (e.g.

, murres, auklets, cormorants) likely use Yaquin a Bay and River and adjacent waters for foraging.

Figure A

- 1 1 . Wildlife ResourcesAppendix A, Yaquina ODMDS Evaluation / EA A

- 34 

## C OMMERCIAL AND 

## R ECREATIONAL 

## F ISHERIES



## - E CONOMICS

T he major commercial and recreational fishing areas in the vicinity of the Yaquina ODMDS are

s hown in Figure A

- 5 . Based on data from NMFS (2006) for commercial fishing, a total of 393

vessels

, all commercially registered

, delivered landings to Newport in 2000. Landings were in the

following West Coast fisheries (data shown represents landings in metric tons/value of said

landings/number of vessels making landings; NA = not available): coastal pelagic (158/$14,203/17),

crab (1,613/$7,474,302/99), groundfish (40,389/$9,382,966/179), highly migratory species

(1,403/$2,626,906/180), salmon (368/$1,36 1,844/181), shellfish (NA/NA/2), shrimp

(3,628/$3,240,124/38), and other species (50/$222,093/106). Newport residents owned 90 vessels in

2000, of which 9 were a part of the Groundfish Vessel Buyback Program. Community members

owned 69 vessels that parti cipated in the federal groundfish fishery. In Toledo, community members

owned 20 vessels, 15 of which participated in the federal groundfish fishery.

Based on data from NMFS (2006) for recreational fishing , Newport had at least two outfitter guide

busine sses in 2003. Eight licensed charter vessel businesses were located in Newport. Ten licensed

charter vessel businesses used Newport as their homeport. There were at least six sport fishing

businesses operating in Newport. Newport has 13 licensing vendo rs. In 2000, the number of licenses

sold by active agents was 4,785 at a value of $81,155. Two sport fishing license vendors were

operating in Toledo in 2000 and a total of 906 angling licenses were sold at a total value of $15,021.

For Newport, the 200 0 recreational salmonid catch in the Ocean Boat Fishery was 1,141 Chinook

salmon and 9,124 coho salmon. The recreational non

- salmonid catch in the Ocean Boat Fishery was a

total of 125,112 fish. The top species landed include black rockfish, blue rockfis h, lingcod, Albacore

tuna, Pacific halibut, chilipepper rockfish, California halibut, kelp greenling, yelloweye rockfish, and

yellowtail rockfish.



## M ARINE 

## R ESERVES

The State of Oregon is engaged in a process to establish a network of marine reserves as part of an

overall strategy to manage its marine waters and submerged lands. The overall purpose is to protect,

sustain, or restore the nearshore marine ecosystem, its habitats, and species. A marine reserve is an

area within Oregon’s state territorial sea o r adjacent intertidal area that is protected from all extractive

activities including the removal or disturbance of living and non

- living marine resources. Marine

reserves are intended to provide lasting protection. The State is moving forward with

recom mendations by the Ocean Policy Advisory Council (OPAC) to establish marine reserves at Otter

Rock, Redfish Rocks, Cape Perpetua, Cascade Head, and Cape Falcon. Of these, t he Otter Rock

marine reserve is the nearest site to the proposed Yaquina North and S outh ODMDS. The Otter Rock

marine reserve is located in Lincoln County between the cities of Newport and Depoe Bay, and

encompasses approximately 1.3 square miles of nearshore waters. This marine reserve area is located

about 8 miles north of the propose d Yaquina North and South ODMDS

.Appendix A, Yaquina ODMDS Evaluation / EA A

- 35 

## R EFERENCES

Auth, T.D. and R.D. Brodeur. 2006. Distribution and community structure of ichthyoplankton off the

coast of Oregon , USA, in 2000 and 2002. Marine Ecology Progress Series 319:199

- 213.

Auth , T.D., R

. D. Brodeur

, and K

. M. Fisher . 2007. Diel variation in vertical distribution of an offshore

ichthyoplankton community off the Oregon Coast. Fish Bulletin 105:313

- 326

.

Brodeur, R.D., D.M. Gadomski, W.G. Pearcy, H.P. Batchelder, and C.B. Miller. 1985. Abundance and

distr ibution of ichthyoplankton in the upwelling zone off Oregon during anomalous El Niño

conditions. Estuarine Coastal and Shelf Science 21:365

- 378.

Hancock, D.R., P.O. Nelson, C.K. Sollitt, and K.J. Williamson. 1981. Coos Bay Offshore Disposal

Site Investiga tion Interim Report, Phase I, February 1979

- March 1980. Report to the U.S. Army

Corps of Engineers, Portland District. Oregon State University, Corvallis OR.

Keister, J.E. and W .T . Peterson . 2003. Zonal and seasonal variations in zooplankton community

str ucture off the central Oregon C oast, 1998

- 2000

. Progress in Oceanography 57 : 341

- 361

.

Marine Taxonomic Services, Ltd. January 2009. D raft R eport, O regon C oast O cean Dredged M aterial

D isposal S ite B enthic S urvey. Prepared for U .S. Environmental Protection A gency R egion 10

, Seattle

, W A.

NMFS ( N ational Marine Fisheries Service ). 2006. Draft Community Profiles for West Coast and

North Pacific Fisheries

- Washington, Oregon, California, and other U.S. States . Socioeconomics

Program, Northwest Fisheries Science Center and Economics and Social S ciences Research

Program, Alaska Fisheries Science Center.

OWET (Oregon Wave Energy Trust). 2011. Baseline characterization and monitoring of the OSU

mobile ocean test berth site: Benthic habitat characteristics and organi sms on the central Oregon

Coast. 33p. www.oregonwave.org (Accessed February 2012).

Peterson, W.T. and C.B. Miller

. 1976. Zooplankton along the continental shelf off Newport, OR 1969

- 1972: distribution, abundance, s easonal cycle, and year to year variations. Oregon State

University, Sea Grant College Program Pub. No. ORESU

- T

- 76

- 002.

Peterson, W.T. and Miller, C.B. 1977. Seasonal cycle of zooplankton abundance and species

composition along the central Oregon C oast. F ishery Bulletin 75 : 717

– 724.

Peterson, W.T., C.B. Miller and A. Hutchinson

. 1979. Zonation and mainte nance of Copepod

populations in the Oregon upwelling zone. Deep

- Sea Research 26A:467

- 494.

Richardson, S.L. 1973. Abundance and distribution of larval fish es in waters off Oregon, May

- October

1969, with special emphasis on the northern anchovy, Engraulis mordax

. Fishery Bulletin 71:697

-

711.

Richardson, S.L. and W.G. Pearcy. 1977. Coastal and oceanic larvae in an area of upwelling off

Yaquina Bay, Oregon. Fi shery Bulletin 75:125

- 145.Appendix A, Yaquina ODMDS Evaluation / EA A

- 36 

### Richardson, M.D., A.G. Carey and W.A. Colgate. 1977. An Investigation of the Effects of Dredged

Material Disposal on Neritic Benthic Assemblages off the Mouth of the Columbia River. Phase II.

USACE Portland District for Contract Number DACW57

- 76

- R

- 0025.Appendix A, Yaquina ODMDS Evaluation / EA A

- 37 

### Richard son, S.L., J.L. Laroche and M.D. Richardson

. 1980. Larval fish assemblages and associations

in the northwest Pacific Ocean along the Oregon coast, winter

- spring 1972

- 1975. Estuarine and

Coastal Marine Science 11 : 671

- 698

.

USACE ( U.S. Army Corps of Engineers). 1985

. Yaquina Bay Interim Ocean Dredged Material

Disposal Site Evaluation Study. Portland District, Portland OR

.

USACE. 1988 a . Chetco Ocean Dredged Material Disposal Site Evaluation

, Final Report. Portland

District, Portland OR.

USACE

. 1988 b . Rogue Ocean Dredged Material Disposal Site Evaluation

, Final Report. Portland

District, Portland OR

.

USACE and EPA. March 2011. 2008 Monitoring Studies at Yaquina Bay Ocean Dredged Material

Disposal Sites (ODMDS) . Final Data Re port. Portland District and EPA Region 10.

Weitkamp, L.A. 2009. Marine distribution of Chinook salmon ( Oncorhynchus tshawytscha ) from the

w est c oast of North America determined by coded wire tag recoveries. Transactions of the

American Fisheries Society 1 39:147

- 170.Appendix A, Yaquina ODMDS Evaluation / EA A

- 38 

# ATTACHMENT A

D EMERSAL 

## F ISH 

## D ATA BY 

## L OCATION



## , A UGUST 

## 2008

North ODMDS

Trawl YQB

- 01

N to S in North ODMDS

Western third YQB

- 02

S to N in North ODMDS

Eastern edge

Replicate number 1 1

Common Name Latin name Adult Juvenile UD Adult Juve nile UD

Big skate Raja binoculata 2 1

Butter sole Isopsetta isolepis 1 11 1 18

Curl fin Pleuronichthys decurrens 1

English sole Parophrys vetulus 1 50 2 30

Ling cod Ophiodon elongatus

Pacific sanddab Citharichthys sordidus 25 28 2 13

Pacific staghorn sculpin Leptocottus armatus 1

Pacific tomcod Microdadus proximus 3 10

Petrale sole* Eopsetta jordani 1 1

Pricklebreast poacher Stellerina xyosterna

Rock sole Lepidopsetta sp.

Sablefish Anoplopoma fimbria

Sand sole Psettiethys melanostictu 2 16 3

Showy snailfish Liparis pulchellus 3

Smelt

- unknown sp Atherinops sp.

Snailfish (marbled?) Liparis (dennyi)? 1

Speckled sanddab Citharichthys stigmaeus

Spotted ratfish Hydrola gus colliei 1 1

Starry flounder Platichthys stellatus 1

Tubenose poacher Pallasina barbata 1

Warty poacher Ocella verrucosa 9 1

Unidentified sculpin

Subtotals 35 111 0 19 74 2

Totals 146 95

% of Total Catch 15.9 10.3

* The adult petrale sole from trawl YQB

- 01 had a 2.5 cm dorsal growth; adult fish, 3

- 4 years.

UD = Life stage undetermined

Source: USACE and EPA 2011Appendix A, Yaquina ODMDS Evaluation / EA A

- 39 

### North of North ODMDS

Trawl YQB

- 05

SW to NE

North of North ODMDS YQB

- 05

N to S

North of North ODMDS

Replicate number 1 2

Common Name Latin name Adult Juvenile UD Adult Juvenile UD

Big skate Raja binoculata 1 2 2

Butter sole Isopsetta isolepis 4 28 3 31

Curl fin Pleuronichthys decurrens

English sole Parophrys vetulus 4 33 2 42

Ling cod Ophiodon elongatus 1

Pacific sanddab Citharichthys sordidus 1 11 5 11

Pacific staghorn sculpin Leptocottus armatus 4 1 2 1

Pacific tomcod Microdadus proximus 43 48

Petrale sole* Eopsetta jordani 1

Pricklebreast poacher Stellerina xyo sterna 1

Rock sole Lepidopsetta sp. 1

Sablefish Anoplopoma fimbria 2

Sand sole Psettiethys melanostictu 2 17 2 8

Showy snailfish Liparis pulchellus 1

Smelt

- unknown sp Atherinops sp. 1

Snailfish (marbled?) Liparis (dennyi) ? 6

Speckled sanddab Citharichthys stigmaeus

Spotted ratfish Hydrolagus colliei

Starry flounder Platichthys stellatus 1

Tubenose poacher Pallasina barbata

Warty poacher Ocella verrucosa 4 7

Unidentified sculpin 1

Subtotals 22 136 0 22 149 6

Totals 158 177

% of Total Catch 17.2 19.3

UD = Life stage undetermined

Source: USACE and EPA 2011Appendix A, Yaquina ODMDS Evaluation / EA A

- 40 

### South ODMDS

Location South ODMDS

Trawl YQB

- 03

N to S in South ODMDS

Western third YQB

- 04

N to S in South ODMDS

Ea stern third YQB

- 04

S to N in South ODMDS

Eastern third

Replicate number 1 1 2

Common Name Latin name Adult Juvenile UD Adult Juvenile UD Adult Juvenile UD

Big skate Raja binoculata 1 1 1

Butter sole Isopsetta isolepis 12 2 20 4 4

Curl fin P leuronichthys decurrens

English sole Parophrys vetulus 4 21 8 32 26

Ling cod Ophiodon elongatus

Pacific sanddab Citharichthys sordidus 21 29 38 22 20 7

Pacific staghorn sculpin Leptocottus armatus 2

Pacific tomcod Micr odadus proximus 1 3 3

Petrale sole* Eopsetta jordani 1 1

Pricklebreast poacher Stellerina xyosterna

Rock sole Lepidopsetta sp.

Sablefish Anoplopoma fimbria

Sand sole Psettiethys melanostictu 2 10 3 12 3 7

Sh owy snailfish Liparis pulchellus

Smelt

- unknown sp Atherinops sp.

Snailfish (marbled?) Liparis (dennyi)?

Speckled sanddab Citharichthys stigmaeus 7 1 2

Spotted ratfish Hydrolagus colliei

Starry flounder Plati chthys stellatus 1 1

Tubenose poacher Pallasina barbata 4

Warty poacher Ocella verrucosa 2 4

Unidentified sculpin

Subtotals 30 74 0 64 92 0 32 46 5

Totals 104 156 83

% of Total Catch 11.3 16.9 9.0

UD = Life stage undetermined

Source: USACE and EPA 2011Appendix A, Yaquina ODMDS Evaluation / EA A

- 41 

# ATTACHMENT B

Yaquina ODMDS Bathymetry

– August 2, 2011

.