CEDAR RIVER
RASEUNE
ECOLOG I CAI,
STUDY 1983
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DUANE ARNOLD ENERGY CENTER
CEDAR RIVER OPERATIONAL ECOLOGICAL STUDY
ANNUAL REPORT
January 1983 - December 1983
Submitted by
Donald B. McDonald
Iowa City, Iowa
March, 1984
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TABLE OF CONTENTS
INTRODUCTION 1
SITE DESCRIPTION 2
OBJECTIVES 2
STUDY PLAN 3
OBSERVATIONS 6
Physical Conditions 6
Chemical Conditions 8
ADDITIONAL STUDIES 12
Additional Chemical Determinations 13
Diurnal Variations 13
Zooplankton Studies 14
Fisheries Studies 14
Fish Basket Studies 15
Corbicula Studies....... 16
DISCUSSION AND CONCLUSIONS 17
REFERENCES 21
TABLES 23
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INTRODUCTION
This report presents the results of the physical, chemical and biological
studies of the Cedar River in the vicinity of the Duane Arnold Energy Center
during the tenth year of station operation (January 1983 to December L983) as
required by Section 4.0 "Environmental Surveillance and Special Studies" of
the Nuclear Regulatory Commission's technical specifications.
The Duane Arnold Energy Center Operational Study was implemented in mid-
January 1974. Prior to plant start-up, extensive pre-operational data were
collected beginning in April 1971. These pre-operational studies provided a
substantial amount of "baseline" data with which to compare the information
collected since the station became operational. The availability of ten
years of operational data, collected under a variety of climatic and hydrological
conditions, provides an excellent basis for the assessment of the effects of
the operation of the Duane Arnold Energy Center on the limnology and water quality
of the Cedar River. Equally important is the availability of sufficient data
to identify long-term trends in the water quality of the Cedar River which are
unrelated to station operation but are indicative of climatic conditions or
changes in land use practices or pollution control procedures within the Cedar
River basin.
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SITE DESCRIPTION
The Duane Arnold Energy Center, a nuclear fueled electrical generating
plant, operated by the Iowa Electric Light and Power Company, is located on
the west side of the Cedar River, about 2% miles north-northeast of Palo, Iowa
in Linn County. The plant employs a boiling water nuclear power reactor
producing about 550 MWe of power at full capacity. Waste heat rejected from
the turbine cycle to the condenser circulating water is removed by two closed
loop induced draft cooling towers, wliich require a maximum of 11,000 gpm (about
24.5 cfs) from the Cedar River. A maximum of 7,000 gpm (about 15.5 cfs) may
be lost through evaporation, while 4,000 gpm (about 9 cfs) will be returned
to the river as blowdown water from the cool side of the cooling towers.
OBJECTIVES
Studies to determine the baseline physical, chemical and biological char-
acteristics of the Cedar River near the Duane Arnold Energy Center prior to
plant start-up were instituted in April of 1971. These pre-operational studies
12 3
are described in earlier reports. ' ' Data from these studies served as a
basis for the development of the operational study.
The operational studies were designed to identify and evaluate any signi-
ficant effects of chemical or thermal discharges from the generating station
into the Cedar River as well as the magnitude of impingement on intake screens
or entrainment in the condenser make-up water and were first implemented in
January 1974.».5-s.
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The specific objectives of the operational study are twofold:
1. To continue routine water quality determinations in the Cedar River
in order to identify any conditions which could result in environ-
mental or water quality problems.
2. To conduct physical, chemical and biological studies in and adjacent
to the discharge canal and to compare the results with similar studies
above the intake. This will make it possible to determine any water
quality changes occurring as the result of chemical additions or
condenser passage and to identify any impact of the plant effluent on
aquatic communities adjacent to the discharge.
STUDY PLAN
During the operational phase of the study, sampling sites were estab-
lished in the discharge canal and at four locations in the Cedar River (Figure
1): (1) upstream of the plant at the Lewis Access Bridge (Station 1); (2)
directly above the plant intake (Station 2); (3) at a point approximately 140
feet below the plant discharge (Station 3); and (4) adjacent to Comp Farm,
about h mile below the plant (Station 4). Samples are also taken from the
discharge canal (Station 5).
From January 1979 through December 1983 samples have been collected and
analyzed by Ecological Analysts, Inc. The conclusions contained in this annual
report are based on the results of their analysis.
Samples for general chemical and physical analysis were taken twice per
month while complete chemical analysis, benthic and fishery studies were con-
ducted three times per year.
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Figure i. Location of Operational Sampling Sites
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The following studies are discussed in this report:
I. General Mater Quality Analysis
A. Frequency: Twice per month
B. Location: At all five locations
C. Parameters measured:
1.
Temperature
9.
Phosphate Series (total and
2.
Turbidity
soluble)
3.
Residues (total, filterable
10.
Ammonia
and nonfilterable)
11.
Nitrate
4.
Dissolved Oxygen
12.
Iron
5.
Carbon Dioxide
13.
Tannins and Lignins
6.
Alkalinity (total and
14.
Chemical Oxygen Demand
carbonate)
15.
Biochemical Oxygen Demand
7.
PH
8.
Hardness Series (total and
calcium)
II. Additional Chemical Determinations
A. Frequency: Spring, summer and fall
B. Location: At all five locations
C. Parameters measured:
1. Chloride 6. Lead
2. Nitrite 7. Manganese
3. Sulfate 8. Mercury
4. Chromium (Cr ) 9. Zinc
5. Copper
III. Diurnal Variations
A. Frequency: Spring and summer
B. Location: At all five locations
C. Parameters measured:
1. Temperature 3. pH
2. Dissolved oxygen 4. Alkalinity
IV. Biological Studies
A. Zooplankton studies
1. Frequency: Winter and spring
2. Location: Intake structure
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B. Fisheries
1. Frequency: Spring, summer and fall
2. Location: Upstream and downstream of station
C. Fish Basket Studies
1. Frequency: Summer
2. Location: Upstream and downstream of station and discharge canal
D. Asiatic Clam (Corbicula) Survey
OBSERVATIONS
Physical Conditions
Hydrology (Table 1):
Flow in the Cedar River during the period January to December 1983 con-
tinued to be far above normal. Mean monthly discharges at the Cedar Rapids
gauging station ranged from 2,502 cfs in August to 19,450 cfs in April. Mean
flow for the year was ca. 8,912 cfs, the highest mean flow observed during the
twelve year period of the study and far greater than the 80 year average flow
of 3,339 cfs. Discharges were classified as excessive (greater than the 75%
quartile) in all months except August and were always in excess of the 1951-80
median monthly discharges. Mean monthly discharges ranged from 124% of the
1951-80 monthly median flow in August to 728% of the monthly median flow in
February. High spring flows resulting from heavy rainfall were observed from
March through May 1983 and record mean monthly flows were reported during the
months of February and May. A maximum yearly flow of 30,300 cfs occurred on
April 19. A low flow for the year of 1,790 cfs occurred on September 14. In
spite of limited rainfall during the summer river flows remained relatively
high due to input of bank storage. Hydrological data are summarized in Table 1.
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Temperature (Table 2):
River temperatures during the period ranged from 0.0°C (32.0°F) to
30.2°C (36,4°F). The maximum temperature was observed at the upstream
location (Station 1) on August 18. The highest discharge canal (Station 5)
temperature observed during the period, 33.4°C (92.1°F), was also recorded
on August 18. A maximum temperature differential (AT value) between the
upstream river and the discharge canal (Station 2 vs. Station 5) of 17.8°C
(32.0°F) was observed on January 4.
Because of the extremely high river flows present throughout most of
the year, station operation had little effect on downstream river temperature
and virtually no effect outside of the mixing zone. A maximum AT value
between ambient upstream temperature (Station 2) and the DAEC downstream
station (Station 3) located in the mixing zone for the discharge canal of
3.2°C (5.8°F) was measured on January 19. A maximum temperature elevation at
the Comp Farm station % mile below the plant (Station 2 vs. Station 4) of
0.4°C (0.7°F) was observed on three occasions in January, February and
September.
A summary of water temperature differentials between upstream and down-
stream locations is given in Table 3.
Turbidity (Table 4):
Turbidity values generally exhibited less variation than during the
previous year. This was probably due, in part, to the sustained high flows
during the spring and early summer followed by dry weather and reduced runoff
in late summer. Peak values were substantially less than those observed in
1982. A maximum river turbidity value of 63 NTU was observed in early July
during a period of very high river stage. Minimum turbidity values from
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2 to 6 NTU were observed in the river in February and December. Turbidity
values in the discharge canal were usually similar or slightly higher than
those observed in river samples but no effects on downstream turbidity levels
were apparent.
Residues (Tables 5-7):
Residue determinations included total, nonfilterable and filterable
residues. Total residue values in upstream river samples exhibited less
variation than those of the previous year ranging from 291 to ca. 556 mg/L.
Filterable residue values were relatively low due primarily to the high
river flows and subsequent dilution effects. Upstream values ranged from
219 mg/L in September to 514 mg/L in December. Downstream filterable residue
values at Station 3, 140 feet downstream of the discharge canal, were frequently
higher than upstream values observed above the discharge canal. A maximum
downstream value of 779 mg/L was observed at this location on August 3. Because
of the high river flows filterable residue values at Station 4, H mile below
the plant, were similar to upstream levels. Nonfilterable residue values in
the river were also relatively low ranging from 6 to 164 mg/L and generally
paralleled turbidity levels.
Due to reconcentration in the blowdown, residue values in the discharge
canal were consistently higher than in the river samples during periods of
station operation. A maximum total residue concentration of 1,908 mg/L was
observed in the discharge canal on August 18 while a minimum value of 256 mg/L
was observed in June.
Chemical Conditions
Dissolved Oxygen (Table 8);
Dissolved oxygen concentrations in the river ranged from 6.6 to 20.4
(76 to 265% saturation) during the period. Lowest concentrations were observed
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in July during a period of very high flow. The highest dissolved oxygen
concentrations appeared to be the result of photosynthetic activity in mid
August and early September when flows were relatively low. Relatively high
values (ca. 11 to 14 mg/L) also occurred during the late fall to early
spring periods when water temperatures were low and the solubility of the
gas was increased. Dissolved oxygen concentrations in the discharge canal
(Station 5) continued to be consistently lower than those observed in the
river, ranging from 5.0 to 13.4 mg/L. These lower values appeared to be due
primarily to the reduced solubility of oxygen at higher temperatures and
turbulence which maintained oxygen concentrations at near saturation levels.
Carbon Dioxide (Table 9):
With the exception of a few samples taken during periods of high
photosynthetic activity in May, June, August, and September, free carbon
dioxide was present in all samples taken during 1983. Maximum river
concentration of ca. 6 to 7 mg/L occurred in the spring and fall.
Alkalinity. pH, Hardness (Tables 10-14):
These interrelated factors were influenced by hydrological, climatic and
biological conditions. Highest total alkalinity values in the river
(ca. 240-270 mg/L) occurred during January and December, when ground
water made up a significant portion of river flow. Low values usually
occurred during high flow periods.
With the exception of a few scattered samples taken in late spring
and summer, all river carbonate alkalinity values were below 1 mg/L in samples
throughout the year.
Maximum values of ca. 27 mg/L occurred during a period of high photo-
synthetic activity in August and early September. Values for pH in river
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saraples exhibited little variation ranging from 7.7 in December to 8.6 in
August and September. High levels coincided with periods of increased
photosynthetic activity. In the discharge canal pH values ranged from
7.6 to 9.0. Total hardness values generally parallelled total alkalinity
levels with highest values (ca. 300-400 mg/L) occurring in the late fall
and winter. A low value of 157 mg/L was observed during a high flow period
in July.
Phosphates (Tables 15 and 16):
Total phosphate concentrations in river samples remained quite low and
exhibited little variation during 1983. Concentrations ranged from <0.1 mg/L
in June, July and December to 1.09 mg/L in August. In the past, high phosphate
values frequently occurred during high flow periods but this pattern was
not observed in 1983.
Orthophosphate concentrations in river samples were also low ranging
from <0.01 mg/L at all locations in May to maximum values of 0.17 mg/L on
August 3. As in previous years, reduced orthophosphate concentrations
frequently coincided with large plankton populations as a result of uptake
by algae.
Phosphate values in the discharge canal were consistently higher than in
the river but differences between upstream and downstream locations were minimal.
A maximum total phosphate concentration of 1.39 mg/L was observed in the
discharge canal in July.
Ammonia and Nitrate Nitrogen (Tables 17 and 18);
Ammonia nitrogen concentrations in the river were relatively low throughout
the year ranging from <0.01 to 0.64 mg/L. Highest concentrations accompanied
snowmelt and high flows in March while low values occurred at intervals during
the summer.
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The trend in increasing nitrate nitrogen concentrations which has been
observed for the past several years continued during 1983. The highest
maximum and average nitrate concentrations in river samples observed during
the course of the DAEC study were recorded during the current year. Values
in river samples ranged from ca. 2.1 mg/L in early September to 24 mg/L in
April. The average nitrate nitrogen concentration at Station 2, upstream
of DAEC. was 8.4 mg/L and 23% of all river samples exhibited concentrations
1 3
in excess of the EPA drinking water standards of 10 mg/L. Concentrations
in excess of 10 mg/L were observed in January, February, April, November
and December. As in previous years, these high values appear to be related
to input from agricultural land and were not related to station operation.
14,15
Similar increases have been observed in the Iowa River in recent years.
Nitrate concentrations were frequently higher in the discharge canal than
in river samples due to reconcentration in the blowdown. A maximum nitrate
nitrogen concentration of ca. 21.1 mg/L was observed in the discharge canal
in July.
Iron (Table 19):
Iron concentrations in the river continued to be high during the current
year but did not reach the maximum levels observed in 1982. In 1983, values
ranged from <0.1 to 3.04 mg/L. Highest concentrations occurred in April, June
and July and values in excess of 2 mg/L were also observed in January and
August. High values usually accompanied periods of high river flow. Low values
usually occurred during periods of low flow in the winter. High iron concentra-
tions were usually observed in association with high turbidity values indicating
that most of the iron present was in the suspended form rather than in solution.
Due to reconcentration in the blowdown discharge iron levels were frequently
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higher in the discharge canal than in the river samples. A maximum iron
concentration of 6.04 mg/L was observed in the discharge canal on July 21.
Lignins and Tannins (Table 20):
Concentrations of these substances which are derived primarily from
decaying plant material remained very high during 1983 ranging from 0.30
to 6.04 mg/L in river samples. Minimum values were generally observed
during low flow periods in the late fall. Concentrations in excess of
3 mg/L were observed in February, March, June, July and August.
Chemical Oxygen Demand (Table 21):
Chemical oxygen demand (COD) values in the river ranged from <15 to
114 mg/L. Minimum values occurred in January and February. Highest values
usually occurred in the fall.
Biochemical Oxygen Demand (Table 22):
Five-day biochemical oxygen demand (BOD5) values in the river ranged
from 1.0 to 15.0 mg/L. High values associated with spring runoff were not
observed during the current year and in general the late winter to late
spring period was characterized by low BOD levels. Maximum values usually
coincided with large algal populations in late August and early September.
ADDITIONAL STUDIES
In addition to the routine monthly studies, a number of seasonal limno-
logical and water quality investigations were conducted during the spring,
summer and fall periods. The studies discussed here include additional
chemical determinations, diurnal chemical analysis, zooplankton and fisheries
studies.
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Additional Chemical Determinations
Samples for chloride, nitrite, sulfate and heavy metal analysis were
collected at all sampling stations in May, August and November. In general,
the nonmetallic constituents exhibited little variation seasonally or
between the river stations. Concentrations usually fell within the expected
ranges and were similar to those observed in 1982. Chloride concentrations
in the river ranged from ca. 17 to 32 mg/L while nitrite concentrations
remained low ranging from <0.01 to <0.04 mg/L indicating little evidence of
recent municipal wastewater pollution. Sulfate values in the upstream
river ranged from 24 to 46 mg/L. Higher values (155 and 85 mg/L) occurred
in the mixing zone (Station 3) in August and November but concentrations at
Station 4, % mile below the plant were similar to those observed upstream.
Sulfate concentrations were consistently higher in the discharge canal
(Station 5).
Most heavy metal concentrations were relatively low, especially during
May and November when river flows were unusually high. Two copper values
16
and one mercury values in excess of the Iowa Water Quality Standard were
observed in the May samples, but the high mercury value and the highest
copper value both occurred at Station 2 upstream of the Duane Arnold Energy
Center intake.
The results of the quarterly chemical determinations are given in
Table 23.
Diurnal Variations
The diurnal studies of dissolved oxygen, carbon dioxide, alkalinity,
pH and water temperatures which were conducted in May and August and are
summarized in Table 24. The results of the spring studies reflect the
effect of high river flows. Oxygen concentrations and pH levels exhibited
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little diurnal variation at any of the river locations. A maximum observed
diurnal variation in dissolved oxygen in the river of 0.5 mg/L was recorded
at Location 2. Values for pH did not vary over 0.1 unit at any river location.
River flow was substantially lower during August, and as a result diurnal
variation in both dissolved oxygen and pH values were significantly greater.
As in previous summer studies, highest oxygen values occurred during the
afternoon while minimum concentrations were observed in the early morning
hours. A maximum dissolved oxygen concentration of 11.4 mg/L (144% saturation)
was observed at Station 4, % mile below the plant, while a minimum river value
of 7.5 mg/L (90% saturation) occurred at the upstream DAEC site (Station 2).
Values for pH in river samples during the August study ranged from 8.3 to 8.7.
As expected, the highest pH values were observed during the late afternoon.
Zooplankton
Zooplankton studies were conducted during February and May. The zoo-
plankton populations collected at the intake exhibited higher densities than
those observed in 1982 but species composition and diversity were typical of
that normally observed in mid-western rivers. Rotifers continued to be the
dominant organism in all samples accounting for over 87% of all zooplankton.
3
Highest zooplankton densities occurred in May (ca. 137,000 organisms/M ).
The results of the zooplankton studies are summarized in Table 25.
Fisheries Studies
Fisheries studies were conducted in May, August and November. Fish
were collected upstream at Lewis Access (Location 1) and at the DAEC site
by electroshocking, seining and baited hoop nets. Although diversity was
only slightly higher than in prior years, the total numbers of fish collected
was the highest since 1980. This is especially significant in view of the
high flows present during 1983. A total of 1,261 fish comprising 34 species
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were collected during the period. Shiners, primarily spotfin shiner and
sand shiner continued to be the dominant forms collected comprising 58%
of the total catch. Carpsuckers and carp were also common, together account-
ing for 13 and 5%, respectively, of the catch. Gamefish such as catfish,
sunfish, crappie, bass and pike accounted for about 7% of fish collected,
about the same percentage as during the previous year. Both total numbers
and diversity were lowest during the May sampling period but there were no
major variations in species composition among the sampling periods. No
consistent differences in size or composition of populations between the
upstream and DAEC site locations were apparent and the differences that were
present appeared to be due to habitat characteristics rather than station
operation. A tabulation of fish collected is given in Table 26.
Fish Basket Studies
Live basket studies to determine the effects of blowdown discharge
from the Duane Arnold Energy Center on channel catfish were conducted over
a 48-hour period from August 3 to 5. Ten fish were placed in each of three
live boxes located in the river immediately upstream of the station (Station
2), immediately below the discharge canal (Station 3) and in the discharge
canal (Station 5). The boxes were checked at six-hour intervals to determine
fish condition and water temperature. No fish mortality was observed in any
of the live boxes during the first 24 hours. After 48 hours, six fish re-
amined alive in the box located upstream of the station while seven fish
survived in each of the boxes located in the discharge canal and the river
downstream of the discharge. Temperature differentials between the upstream
river location and the discharge canal ranged from 0.2 to 5.0°C(0.4 to 9.0°F)
while differences between upstream and downstream locations ranged from
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0 to 2.4°C(0 to 4.3°F), A maximum temperature of 31.4°C(88.5°F) was observed
in the discharge canal. The current live box studies continue to indicate
that confinement of fish in the live boxes rather than station discharge
was the major cause of the observed fish mortality. The results of the live
basket studies are given in. Table 27.
Asiatic Clam Survey
In recent years several power generation facilities have experienced
problems with blockage of cooling water intake systems by large numbers of
Asiatic Clams (Corbicula sp.). Although this clam is common in portions of
the Iowa reach of the Mississippi River, it is normally absent from areas
with a shifting sand/silt substrate such as occur in the Cedar River in the
vicinity of the Duane Arnold Energy Center. Corbicula has not been collected
from the Cedar River in the vicinity of the DAEC during the routine Cedar
River monitoring program which was implemented in April 1971. A single
Corbicula was, however, collected in January of 1979 in the vicinity of
Lewis Access upstream of DAEC by Eazelton personnel. Because Corbicula had
been collected on one occasion from the Cedar River and is commonly found in
power plant intakes on the Mississippi River, studies were implemented at the
Duane Arnold Energy Center in 1981 in order to determine if the organism had
established itself within the system. No Corbicula were collected during the
1981 and 1982 investigations. These studies were continued during April
and November 1983 and, like the previous studies, did not reveal the presence
of the organism in samples taken from the two intake bays or between the bar
rack and the traveling screens. Corbicula were also absent from samples
taken in the discharge canal and in the river adjacent to the station.
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DISCUSSION AND CONCLUSIONS
In many respects the conditions seen in 1983 were similiar to those
observed during 1982 in that the effects of the extremely high river flows
present in 1982 and 1983 were evident during both years. During 1983 the
mean discharge in the Cedar River, as measured at the Cedar Rapids gauging
station was 8,912 cfs, well in excess of the 1982 mean flow of 7,252 cfs
and nearly three times the 80-year average flow of 3,339 cfs. As a result,
the effects of station operation on the downstream river were insignificant.
During 1983, the average temperature elevation at Station 3, located in the
mixing zone, was only 0.8 C (1.4°F) above that of the upstream DAEC location
(Station 2). The maximum observed temperature differentials between Stations
2 and 3 occurred during the winter months and never exceeded 3.2°C (5.8°F).
Observed temperature differentials at the Comp Farm location, one-half mile
below the station, were even lower averaging only 0.1°C (0.2°F) and never
exceeding 0.4°C (0.7°F). Although reconcentration of solids in the blowdown
consistently resulted in increased levels of many parameters in the discharge
canal, effects on the downstream river were minimal. Only filterable residues,
hardness, chemical oxygen demand and sulfates were routinely higher directly
downstream of the discharge (Station 3) than at upstream locations and only
filterable residue and hardness values were higher at Station 4, \ mile
below the plant.
In spite of the high flows present during 1983, nitrate concentrations
continued to increase reaching the highest average concentration observed
since the study was first implemented in 1972. Nitrate concentrations in
excess of the Iowa Water Quality Standard16 were observed in 22 of the 96
river samples taken during 1983 as compared to 18 excessive values in 1982.
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Obviously these high values were not related to station operation since the
high values were observed at both upstream and downstream locations. Two
other parameters also exhibited values in excess of the Iowa Water Quality
Standard!6 Two copper values and one mercury value exceeded the standard
in May but none appeared to be related to the operation of the Duane Arnold
Energy Center since the high mercury concentration and the highest copper
concentration both occurred at Station 2, upstream of the intake structure.
In spite of the high river flows present, fish collections yielded the
largest total number of fish since 1980 and the greatest number of species
since the current sampling protocol was implemented in 1979. A review of
the fishery data collected since 1979 indicate that station operation has
had no demonstrable effect on the fishery of the Cedar River. Although
seasonal and yearly fluctuations in the numbers, distribution and diversity
of the fishery have occurred, no consistent differences between upstream and
downstream fish populations have been observed. In addition, no long-term
trends in the size or diversity of the fishery are apparent. During the
1979-1983 period a total of 5,186 fish were collected at the two sampling
locations, upstream and downstream of the Duane Arnold Energy Center. Of
these, 2,517 or 49% were collected at the upstream location while 2,669
or 51% were collected downstream. Of the 243 gamefish collected during
the period, 126 were collected upstream as compared to 117 at the downstream
site. Overall, gamefish comprised about 5% of the total numbers collected.
A summary of the 1979-1983 fishery data is given in Table 28. In summary,
it appears that the nature of the fishery of the Cedar Rivtr in the vicinity
of the Duane Arnold Energy Center has remained relatively constant during
the study period and has not been affected by the operation of the station.
Fluctuations in distribution and abundance are evident and are related to
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hydrologic and seasonal factors but these changes are transitory in nature
and the major factor limiting the variety of the Cedar River fishery is
the limited habitat diversity resulting from siltation of the bottom and
the absence of significant areas suitable for the spawning and feeding of
many forms. In spite of these limitations, the river in the vicinity of
the station continues to support a relatively productive and diverse game
fishery.
The results of the 1983 studies continue to be consistent with those of
prior years and support the conclusion that the limnology and water quality
of the Cedar River is influenced to a far greater extent by hydrological
conditions and agricultural activities in the drainage basin than by municipal
or industrial discharges. Because of the magnitude of the impact of agri-
cultural land runoff on the Cedar River, modifications of agricultural practices
have resulted in a number of long-term trends and changes in water quality
which are apparent when the 12*5 years of data collected since the inception
of the Duane Arnold Energy Center study are analyzed. It is evident from
Table 29 which presents average yearly values for turbidity, phosphate,
ammonia, nitrate and BOD for the period 1972-1983 that concentrations of
phosphate and ammonia, were higher and nitrate values far lower during the
earlier years of the study. This is especially true when years with similar
mean river flows are compared, i.e. 1972 to 1980 and 1973 to 1983. This
pattern is even more apparent in the quantities of materials transported
by the river as illustrated in Table 30 which presents relative loading
values calculated by multiplying the average annual concentrations of the
various parameters by the cumulative runoff for each year of the study.
The decreased levels of phosphate and ammonia, substances which usually
enter the river absorbed onto soil particles, are probably related to
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increased use of minimum tillage and, in 1983, the PIK program which reduced
crop production in the basin. In 1983, average nitrate concentrations
reached the highest level observed during the study period. This is especially
significant in view of the extremd.y high river flows present. An estimate
of the amount of nitrate transported by the Cedar River in 1983, as compared
to earlier years, can be gained by an examination of the relative loading
values given in Table 30. When data from the current year is compared
with that of 1973, a year of comparable high flows, it is apparent that the
nitrate loading in the river in 1983 was over 6 times greater than in 1973.
Increasing nitrate levels have also been observed in other Iowa River systems
and are the result of the continued heavy application of nitrogen based
fertilizers. Although high nitrate concentrations are not deliterious to
aquatic organisms, their presence in potable water supplies are of concern
when these waters are consumed by infants. Obviously the high nitrate levels
present in the Cedar River are unrelated to the operation of the Duane Arnold
Energy Center.
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REFERENCES CITED
McDonald, D.B., "Cedar River Baseline Ecological Study Annual Report, April
1971-April 1972. Duane Arnold Energy Center." Report prepared for Iowa
Electric Light and Power Company by the University of Iowa, 1972.
McDonald, D.B., "Cedar River Baseline Ecological Study Annual Report, May
1972-April 1973. Duane Arnold Energy Center." Report prepared for Iowa
Electric Light and Power Company by the University of Iowa, 1974.
McDonald, D.B., "Cedar River Baseline Ecological Study Final Pre-Operational
Report, May 1973-January 1974." Report prepared for Iowa Electric Light and
Power Company by the University of Iowa, 1974.
McDonald, D.B., "Cedar River Baseline Ecological Study Annual Operational
Report, January 1974-January 1975. Duane Arnold Energy Center." Report
prepared for Iowa Electric Light and Power Company by the University of
Iowa, 1975.
McDonald, D.B., "Cedar River Baseline Ecological Study Annual Report, January
1975-January 1976. Duane Arnold Energy Center." Report prepared for Iowa
Electric Light and Power Company by the University of Iowa, 1976.
McDonald, D.B., "Cedar River Baseline Ecological Study Annual Report, January
1976-December 1976. Duane Arnold Energy Center." Report prepared for Iowa
Electric Light and Power Company by the University of Iowa, 1977.
McDonald, D.B., "Cedar River Baseline Ecological Study Annual Report,
January 1977-December 1977. Duane Arnold Energy Center." Report prepared
for Iowa Electric Light and Power Company by the University of Iowa, 1978.
McDonald, D.B., "Duane Arnold Energy Center Cedar River Operational Ecological
Study Annual Report," January 1978-December 1978. In: Reports of Environ-
mental Monitoring Program, January 1978-December 1978, Iowa Electric Light
and Power Company, 1979.
McDonald, D.B., "Duane Arnold Energy Center Cedar River Operational Ecological
Study Annual Report, January 1979-December 1979." Report prepared for Iowa
Electric Light and Power Company by D.B. McDonald Research, Inc., Iowa City,
May 1980.
McDonald, D.B., "Duane Arnold Energy Center Cedar River Operational Study
Annual Report, January 1980-December 1980." Report prepared for Iowa
Electric Light and Power Company by D.B. McDonald Research, Inc., June 1981.
McDonald, D.B., "Duane Arnold Energy Center Cedar River Operational Stu^.v
Annual Report, January 1981-December 1981." Report prepared for Iowa
Electric Light and Power Company, May 1982.
McDonald, D.B., "Duane Arnold Energy Center Cedar River Operational Study
Annual Report, January 1982-December 1982." Report prepared for Iowa
Electric Light and Power Company, May 1983.
-------
-22-
13. National Interim Primary Drinking Water Standards. Federal Register.
U.S. Environmental Protection Agency, Vol. 40, No. 248 (Dec. 24, 1975).
14. McDonald, D.B., "Summary of the Limnology and Trends in Water Quality of
the Coralville Reservoir and Iowa River During the 1980 Water Year," In:
Water Quality in the Corps of Engineers Reservoirs in Iowa, Proceedings
of the March 1981 Seminar.
15. McDonald, D.B., Coralville Reservoir Water Quality Study, April 1, 1982 to
January 31, 1983, Iowa Institute of Hydraulic Research Limited Distribution
Report, #112, June 1983.
16. State of Iowa, "Water Quality Standards," Chapter 16, 400 Iowa Administrative
Code. State of Iowa, Des Moines, Iowa. March 1978.
-------
-23-
TABLE 1
SUMMARY OF HYDROLOGICAL CONDITIONS
CEDAR RIVER AT CEDAR RAPIDS*
1983
Date
1983
Mean Monthly
Discharge (cfs)
Percent of
1951-1980
Median Discharge
January
5,910
565
February
8,880
728
March
15,380
290
April
19,450
333
May
15,600
365
June
8,480
200
July
11,070
338
August
2,502
124
September
5,122
287
October
4,293
29 7
November
5,219
283
December
5,041
402
*Data obtained from U.S. Geological Survey records
-------
-24-
TABLE 2
TEMPERATURE (C) VALUES FROM THE CEDAR RIVER NEAR
THE DUANE ARNOLD ENERGY CENTER DURING 1983
Sampling Locations
Upstream 140 ft. 1/2 Mile
Upstream of Plant Discharge Downstream Downstream
of Plant Intake Canal of Discharge from Plant
1 2 5 3 4
JAN 04 83
0.0
0.0
17.8
0.7
0.1
JAN 19 83
0.0
0.0
9.2
3.2
0.4
FEB 01 83
0.0
0.0
12.8
0.7
0.2
FEB 14 83
0.1
0.0
1.7
0.7
0.4
MAR 02 83
5.0
5.0
17.5
5.1
5.0
MAR 16 83
4.8
4.7
6.0
4.8
4.8
APR 05 83
4.4
4.4
10.4
4.4
4.4
APR 18 83
5.8
6.0
7.8
6.1
6.0
MAY 03 83
11.7
11.8
12.0
11.9
11.8
MAY 18 83
13.8
13.8
26.6
14.1
13.8
JUN 07 83
17.6
18.0
18.9
17.2
17.0
JUN 20 83
21.8
21.8
22.4
21.6
21.6
JUL 05 83
22.7
22.9
27.6
23.0
22.9
JUL 21 83
29.8
29.3
33.0
29.4
29.4
AUG 03 83
26.3
26.5
30.9
26.6
26.5
AUG 18 83
30.2
29.4
33.4
29.5
29.4
SEP 07 83
22.8
23.2
27.9
24.3
23.6
SEP 19 83
20.4
19.4
29.6
21.0
19.5
OCT 05 83
17.6
17.9
22.9
18.6
17.9
OCT 19 83
10.6
10.7
11.0
10.8
10.8
NOV 02 83
12.2
12.2
17.1
13.8
12.3
NOV 17 83
4.5
4.5
20.9
6.2
4.8
DEC 08 83
0.0
0.0
1.3
0.2
0.0
DEC 20 83
0.0
0.0
0.0
0.0
0.0
-------
62
94
74
0
0
0
0
0
0
88
0
0
80
87
84
86
91
69
0
0
100
100
100
-25-
TABLE 3
SUMMARY OF WATER TEMPERATURE DIFFERENTIALS AND STATION
OUTPUT DURING PERIODS OF CEDAR RIVER SAMPLING - 1983
AT (°C) AT (°C) AT (°C)
U/S River (St. 2) U/S River (St.2) U/S River (St.2)
vs. Dis.Canal(St.5) vs. D/S River (St.3) vs.^D/S River (St.4)
17.8
0.7
0.1
9.2
3.2
0.4
12.8
0.7
0.2
1.7
0.7
0.4
12.5
0.1
0.0
1.3
0.1
0.1
6.0
0.0
0.0
1.8
0.1
0.0
0.2
0.1
0.0
12.8
0.3
0.0
0.9
-0.8
-1.0
0.6
-0.2
-0.2
4.7
0.1
0.0
3.7
0.1
0.1
4.4
0.1
0.0
4.0
0. 1
0.0
4.7
1.1
0.4
10.2
1.6
0.1
5.0
0.7
0.0
0.3
0.1
0.1
4.9
1.6
0.1
16.4
1.7
0.3
1.3
0.2
0.0
0.0
0.0
0.0
-------
-26-
TABLE 4
TURBIDITY (N.T.U.) VALUES FROM THE CEDAR RIVER NEAR
THE DUANE ARNOLD ENERGY CENTER DURING 1983
Sampling Locations
Upstream 140 ft. 1/2 Mile
Upstream of Plant Discharge Downstream Downstream
of Plant Intake Canal of Discharge From Plant
1 2 5 3 4
JAN 04 83
12
28
25
14
13
JAN 19 83
4.2
4.2
7.8
3.4
7.3
FEB 01 83
3.4
3.6
3.8
3.4
3.3
FEB 14 83
5.3
6.2
6.6
5.0
4.7
MAR 02 83
21
20
2.8
20
21
MAR 16 83
22
21
11
21
21
APR 05 83
38
37
12
37
36
APR 18 83
58
53
45
54
47
MAY 03 83
24
27
32
23
26
MAY 18 83
24
26
50
24
25
JUN 07 83
35
35
36
48
40
JUN 20 83
33
30
15
32
29
JUL 05 83
56
63
141
55
58
JUL 21 83
36
34
75
37
35
AUG 03 83
31
30
62
41
32
AUG 18 83
24
21
61
15
22
SEP 07 83
18
20
36
22
13
SEP 19 83
15
14
58
15
16
OCT 05 83
20
21
29
22
23
OCT 19 83
15
14
18
16
17
NOV 02 83
16
16
94
17
23
NOV 17 83
9
14
35
14
10
DEC 08 83
10
10
13
11
11
DEC 20 83
2.5
6.4
6.0
2.9
3.1
-------
-27-
TABLE 5
TOTAL RESIDUE (mg/1) VALUES FROM THE CEDAR RIVER NEAR
THE DUANE ARNOLD ENERGY CENTER DURING 1983
Sampling Locations
Upstream
of Plant
Upstream
of Plan
Intake
Di scharge
Canal
140 ft. 1/2 Mile
Downstream Downstrear
of Discharge From PIan1
1
2
5
3
4
JAN 04
83
445
512
883
458
434
JAN 19
83
475
491
1016
499
497
FEB 01
83
506
355
751
447
461
FEB 14
83
293
291
305
308
353
MAR 02
83
391
379
626
392
322
MAR 16
83
420
429
476
425
399
APR 05
83
426
431
405
547
475
APR 18
83
311
327
302
294
309
MAY 03
83
556
525
579
510
498
MAY 18
83
378
450
959
442
381
JUN 07
83
508
513
361
485
428
JUN 20
83
404
369
256
411
390
JUL 05
83
378
381
970
369
379
JUL 21
83
526
432
1262
412
332
AUG 03
83
548
532
1497
884
558
AUG 18
83
499
441
1908
381
402
SEP 07
83
332
326
1000
624
437
SEP 19
83
451
350
538
433
291
OCT 05
83
356
366
357
365
426
OCT 19
83
429
407
419
430
455
NOV 02
83
455
441
1819
500
469
NOV 17
83
473
478
1485
705
461
OEC 08
83
418
314
593
323
523
DEC 20
83
522
529
647
480
379
-------
-28-
TABLE 6
FILTERABLE RESIDUE (mg/1) VALUES FROM THE CEDAR RIVER NEAR
THE DUANE ARNOLD ENERGY CENTER DURING 1983
Sampling Locations
Upstream 140 ft. 1/2 Mile
Upstream of Plant Discharge Downstream Downstream
of Plant Intake Canal of Discharqe From Plant
j 2 5 3 5
JAN 04 83
412
392
825
424
404
JAN 19 83
465
476
1001
487
473
FEB 01 83
500
349
740
440
455
FEB 14 83
286
283
294
302
346
MAR 02 83
346
340
612
352
272
MAR 16 83
372
382
467
373
346
APR 05 83
356
364
379
480
400
APR 18 83
239
263
249
232
239
MAY 03 83
457
446
450
437
422
MAY 18 83
321
396
835
380
323
J UN 07 83
428
421
277
386
341
JUN 20 83
266
250
225
281
287
JUL 05 83
271
261
695
259
272
JUL 21 83
412
319
1100
305
420
AUG 03 83
463
448
1340
779
472
AUG 18 83
335
334
1540
307
296
SEP 07 83
239
219
884
514
343
SEP 19 83
381
273
209
378
224
OCT 05 83
304
312
257
304
371
OCT 19 83
387
370
388
388
409
NOV 02 83
410
395
1440
447
397
NOV 17 83
453
450
1370
670
442
DEC 08 83
398
289
553
299
504
DEC 20 83
514
510
628
471
372
-------
-29-
TABLE 7
NONFILTERABLE RESIDUE (mg/1) VALUES FROM THE CEDAR RIVER NEAR
THE DUANE ARNOl.D ENERGY CENTER DURING 1983
Sampling Locations
Upstream 140 ft. 1/2 Mile
Upstream of Plant Discharge Downstream Downstream
of Plant Intake Canal of Discharge From Plant
! 2 5 3 4
JAN 04 83
33
120
58
34
30
JAN 19 83
10
15
15
12
24
FEB 01 83
6
6
11
7
6
FEB 14 83
7
8
11
6
7
MAR 02 83
45
39
14
40
50
MAR 16 83
48
47
9
52
53
APR 05 83
70
67
26
67
70
APR 18 83
72
64
53
62
70
MAY 03 83
99
79
129
73
76
MAY 18 83
57
54
124
62
58
JUN 07 83
80
92
84
99
87
J UN 20 83
138
119
31
130
103
JUL 05 83
107
120
275
110
107
JUL 21 83
114
113
162
107
104
AUG 03 83
85
84
157
105
86
AUG 18 83
164
107
368
74
106
SEP 07 83
93
107
116
110
90
SEP 19 83
70
77
329
55
67
OCT 05 83
52
54
100
61
55
OCT 19 83
42
37
31
42
46
NOV 02 83
45
46
379
53
72
NOV 17 83
20
28
115
35
19
DEC 08 83
20
25
24
24
40
DEC 20 83
8
19
19
9
7
-------
-30-
TABLE 8
JAN
04
83
JAN
19
83
FEB
01
83
FEB
14
83
MAR
02
83
MAR
16
83
APR
05
83
APR
18
83
MAY
03
83
MAY
18
83
J UN
07
83
J UN
20
83
JUL
05
83
JUL
21
83
AUG
03
83
AUG
18
83
SEP
07
83
SEP
19
83
OCT
05
83
OCT
19
83
NOV
02
83
NOV
17
83
DEC
08
83
DEC
20
83
DISSOLVED OXYGEN (mg/1) VALUES FROM THE CEDAR RIVER
NEAR THE DUANE ARNOLD ENERGY CENTER DURING 1983
Sampling Locations r____
Upstream 140 ft. 1/2 Mile
Upstream of Plant Discharge Downstream Downstream
of Plant Intake Canal of Discharge From Plant
1 2 5 ^ 4
13.8
13.8
9.1
13.6
13.7
14.3
14.1
8.9
13.9
14.2
13.5
13.6
10.6
13.5
13.5
12.8
12.8
13.4
12.8
12.8
11.5
11.3
9.1
11.4
11.4
11.5
11.6
12.5
11.6
11.6
11.9
11.9
9.7
11.8
11.9
11.7
11.7
11.4
11.5
11.5
10.2
10.3
10.5
10.3
10.6
10.0
10.0
7.5
9.8
9.9
9.5
9.4
8.9
9.3
9.3
9.0
9.0
8.5
8.8
8.8
6.8
6.9
7.2
6.7
6.6
8.0
8.0
6.8
8.0
8.0
9.4
9.4
6.6
9.0
10.3
17.6
20.4
5.0
19.6
19.8
17.4
18.3
7.0
13.3
17.9
11.7
11.9
7.1
12.0
12.6
10.4
10.4
8.4
10.1
10.5
10.5
10.7
10.9
10.6
10.8
10.9
10.9
7.5
10.7
11.0
12.4
12.6
8.2
12.0
12.4
13.1
14.4
12.7
12.9
12.8
13.4
13.6
11.7
13.1
13.4
-------
-31-
TABLE 9
CARBON niOXIDE (mg/1) VALUES FROM THE CEDAR RIVER NEAR
THE [lUANE ARNOLD ENERGY CENTER DURING 1983
Sampling Locations
Upstream140 ft.1/2 Mile
Upstream of Plant Discharge Downstream Downstream
of Plant Intake Canal of Discharge From Plant
1 2 5 3 4
JAN 04 83
3.6
3.2
2.5
3.9
3.9
JAN 19 83
5.5
4.5
2.9
4.0
4.5
FEB 01 83
5.5
6.0
3.4
6.0
5.5
FEB 14 83
6.5
6.5
6.0
6.5
6.5
MAR 02 83
4.5
4.5
5.5
4.5
4.6
MAR 16 83
3.8
4.2
4.6
3.8
3.8
APR 05 83
3.4
3.4
6.5
3.2
3.8
APR 18 83
4.6
4.6
4.3
4.6
4.6
MAY 03 83
0.0
2.0
2.4
2.0
2.0
MAY 18 83
1.9
1.9
2.2
1.9
2.2
JUN 07 83
2.4
0.0
2.0
2.0
2.0
JUN 20 83
0.0
0.0
0.0
o.o
JUL 05 83
3.4
3.4
0.0
2.7
2.7
JUL 21 83
2.2
2.1
2.1
2.7
2.7
AUG 03 83
1.8
AUG 18 83
1.9
0.8
3.8
0.0
0.0
SEP 07 83
2.3
2.8
11.7
0.0
0.0
SEP 19 83
1.9
3.5
0.0
0.0
OCT 05 83
2.1
2.7
2.5
2.1
2.1
OCT 19 83
6.2
4.9
3.2
4.0
4.9
NOV 02 83
4.8
6.0
5.4
7.0
6.1
NOV 17 83
5.9
5.9
4.4
6.6
5.8
DEC 08 83
1.1
1.1
0.7
0.8
0.8
OEC 20 83
1.6
1.2
1.0
1.1
1.2
Blank spaces
indicate
laboratory
accident or
suspect data.
-------
-32-
TABLE 10
TOTAL ALKALINITY (mg/l-CaCOg) VALUES FROM THE CEDAR RIVER NEAR
THE DUANE ARNOLD ENERGY CENTER DURING 1983
Sampling Locations
Upstream 140 ft. 1/2 Mile
Upstream of Plant Discharge Downstream Downstream
of Plant Intake Canal of Discharge From Plant
1 2 5 3 4
JAN 04
83
219
218
112
213
216
JAN 19
83
243
254
107
241
245
FEB 01
83
230
235
156
230
232
FEB 14
83
220
222
222
222
223
MAR 02
83
185
185
243
184
183
MAR 16
83
198
196
199
197
198
APR 05
83
159
159
231
160
160
APR 18
83
149
148
160
149
148
MAY 03
83
193
191
169
190
190
MAY 18
83
194
194
100
192
194
JUN 07
83
197
206
209
207
206
J UN 20
83
192
191
203
184
193
JUL 05
83
147
147
335
149
149
JUL 21
83
271
252
149
255
251
AUG 03
83
221
223
91
180
219
AUG 18
83
100
97
116
100
97
SEP 07
83
178
140
128
SEP 19
83
202
199
81
182
181
OCT 05
83
214
214
216
214
214
OCT 19
83
216
216
224
224
219
NOV 02
83
222
218
91
210
220
NOV 17
83
225
226
126
213
224
DEC 08
83
223
224
206
220
223
DEC 20
83
270
262
208
242
246
Blank
spaces
indicate
laboratory
accident or
suspect data.
-------
-33-
TABLE 11
CARBONATE (mg/l-CaC03) VALUES FROM THE CEDAR RIVER NEAR
THE DUANE ARNOLD ENERGY CENTER DURING 1983
; Sampling Locations
Upstream 140 ft. 1/2 Mile
Upstream of Plant Discharge Downstream Downstream
of Plant Intake_ Canal of Discharge from Plant
1 2 5 3 4
JAN 04 83
0
0
0
0
0
JAN 19 83
0
0
0
0
0
FEB 01 83
0
0
0
0
0
FEB 14 83
0
0
0
0
0
MAR 02 83
0
0
0
0
0
MAR 16 83
0
0
0
0
0
APR 05 83
0
0
0
0
0
APR 18 83
0
0
0
0
0
MAY 03 83
6
0
0
0
0
MAY 18 83
0
0
0
0
0
JUN 07 83
0
6
0
0
0
JUN 20 83
4
4
8
'4
0
JUL 05 83
0
0
94
0
0
JUL 21 83
0
0
0
0
0
AUG 03 83
0
AUG 18 83
0
0
0
26
26
SEP 07 83
0
0
0
8
27
SEP 19 83
0
0
0
0
OCT 05 83
0
0
0
0
0
OCT 19 83
0
0
0
0
0
NOV 02 83
0
0
0
0
0
NOV 17 83
0
0
0
0
0
DEC 08 83
0
0
0
0
0
DEC 20 83
0
0
0
0
0
Blank spaces
indicate
laboratory
accident
or suspect data.
-------
-34-
TABLE 12
UNITS OF pH FROM THE CEDAR RIVER NEAR THE
DUANE ARNOLD ENERGY CENTER DURING 1983
Sampling Locations
Upstream 140 ft. 1/2 Mile
Upstream of Plant Discharge Downstream Downstream
of Plant Intake Canal of Discharge From Plant
1 2 5 3 4
JAN 04 83
8.2
8.3
7.9
8.2
8.2
JAN 19 83
8.1
8.2
8.0
8.2
8.2
FEB 01 83
8.1
8.1
8.0
8.1
8.1
FEB 14 83
8.0
8.0
8.0
8.0
8.0
MAR 02 83
8.0
8.0
7.9
8.0
8.0
MAR 16 83
8.1
8.0
8.0
8.1
8.1
APR 05 83
8.1
8.1
7.9
8.1
8.0
APR 18 83
7.9
8.0
7.9
8.0
8.0
MAY 03 83
8.4
8.3
8.2
8.3
8.3
MAY 18 83
8.3
8.3
7.9
8.3
8.2
JUN 07 83
8.2
8.4
8.3
8.3
8.3
JUN 20 83
8.4
8.4
8.4
8.5
8.3
JUL 05 83
7.9
7.9
9.0
8.0
8.0
JUL 21 83
8.3
8.3
8.0
8.2
8.2
AUG 03 83
8.5
8.6
7.9
8.4
8.6
AUG 18 83
8.3
7.6
8.6
8.6
SEP 07 83
SEP 19 83
8.6
8.3
7.6
8.4
8.4
OCT 05 83
8.3
8.2
8.2
8.3
8.3
OCT 19 83
7.9
8.0
8.2
8.1
8.0
NOV 02 83
8.0
7.9
7.5
7.8
7.9
NOV 17 83
8.0
8.0
7.7
7.9
8.0
DEC 08 83
CO
•
1—
CO
•
I—
7.9
7.9
7.9
DEC 20 83
7.7
7.8
7.8
7.8
7.8
Blank spaces Indicate laboratory accident or suspect data.
-------
TABLE 13
TOTAL HARDNESS (mg/l-CaC03) VALUES FROM THE CEDAR RIVER NEAR
THE DUANE ARNOLD ENERGY CENTER DURING 1983
Sampling Locations
Upstream 140 ft. 1/2 Mile
Upstream of Plant Discharge Downstream Downstream
of Plant Intake Canal Of Discharqe from Plant
1 2 5 3 4
JAN 04 83
275
307
450
283
296
JAN 19 83
309
293
548
309
318
FEB 01 83
420
313
467
328
307
FEB 14 83
285
284
312
298
290
MAR 02 83
223
227
302
211
201
MAR 16 83
228
254
259
238
230
APR 05 83
205
210
239
211
211
APR 18 83
207
172
174
174
177
MAY 03 83
245
249
255
248
229
MAY 18 83
254
244
399
255
249
JUN 07 83
296
320
258
292
288
JUN 20 83
194
' 189
170
188
187
JUL 05 83
157
171
432
164
167
JUL 21 83
250
266
668
267
268
AUG 03 83
280
246
578
361
261
AUG 18 83
161
190
537
278
SEP 07 83
169
411
244
179
SEP 19 83
259
272
780
354
278
OCT 05 83
289
297
287
307
313
OCT 19 83
235
244
165
240
246
NOV 02 83
386
364
1050
405
361
NOV 17 83
292
291
716
414
275
DEC 08 83
295
288
333
304
277
DEC 20 83
310
302
422
317
315
Blank spaces
indicate
laboratory
accident or
suspect data.
-------
-36-
TABLE 14
CALCIUM HARDNESS (mg/1-CaC03) VALUES FROM THE CEDAR RIVER NEAR
THE DUANE ARNOLD ENERGY CENTER DURING 1983 .
Sampling Locations
Upstream 140 ft. 1/2 Mile
Upstream of Plant Discharge Downstream Downstream
of Plant Intake Canal of Discharge from Plant
1 2 5 3 4
JAN 04 83
182
185
299
180
189
JAN 19 83
203
192
353
203
208
FEB 01 83
190
202
302
205
200
FEB 14 83
195
190
192
187
187
MAR 02 83
142
147
222
143
139
MAR 16 83
160
158
171
161
155
APR 05 83
131
128
156
145
132
APR 18 83
137
115
112
108
111
MAY 03 83
162
162
181
166
159
MAY 18 83
157
153
231
156
156
JUN 07 83
185
176
168
177
182
JUN 20 83
167
162
145
160
160
JUL 05 83
.93
101
260
95
100
JUL 21 83
162
166
434
177
177
AUG 03 83
191
170
372
238
175
AUG 18 83
105
130
360
218
SEP 07 83
99
202
125
93
SEP 19 83
173
175
487
225
186
OCT 05 83
190
196
206
194
191
OCT 19 83
151
152
104
151
154
NOV 02 83
275
260
759
290
260
NOV 17 83
194
190
422
275
180
DEC 08 83
207
204
240
216
198
DEC 20 83
220
216
300
230
227
Blank spaces indicate laboratory accident or suspect data.
-------
-37-
TABLE 15
TOTAL PHOSPHORUS (mg/l-P) VALUES FROM THE CEDAR RIVER NEAR
THE DUANE ARNOLD ENERGY CENTER DURING 1983
Sampling Locations
Upstream 140 ft. 1/2 Mile
Upstream of Plant Discharge Downstream Downstream
of Plant Intake Canal of Discharge from Plant
1 2 5 3 4
JAN 04
83
0.23
0.23
0.50
0.23
0.23
JAN 19
83
0.19
0.19
0.77
0.24
0.24
FEB 01
83
0.24
0.24
0.51
0.24
0.24
FEB 14
83
0.21
0.21
0.21
0.21
0.21
MAR 02
83
0.34
0.27
0.27
0.34
0.34
MAR 16
83
0.27
0.27
0.27
0.34
0.27
APR 05
83
0.23
0.49
0.52
0.23
0.23
APR 18
83
0.27
0.27
0.27
0.27
0.27
MAY 03
83
0.30
0.35
0.50
0.30
0.35
MAY 18
83
0.18
0.18
0.18
0.18
0.23
J UN 07
83
<0.10
<0.10
<0.10
<0.10
<0.10
JUN 20
83
0.40
0.40
0.50
0.50
0.50
JUL 05
83
<0.10
<0.10
0.31
<0.10
0.22
JUL 21
83
0.49
0.49
1.39
0.49
0.49
AUG 03
83
0.45
0.65
1.24
0.60
1.09
AUG 18
83
0.41
0.40
1.14
0.41
0.41
SEP 07
83
0.25
0.25
0.60
0.30
0.25
SEP 19
83
0.20
0.13
0.98
0.17
0.22
OCT 05
83
0.17
0.17
0.22
0.17
0.17
OCT 19
83
0.12
0.13
0.24
0.16
0.13
NOV 02
83
0.23
0.20
0.91
0.23
0.30
NOV 17
83
0.37
0.41
1.08
0.34
0.44
DEC 08
83
<0.1
0.10
<0.1
<0.1
DEC 20
83
0.11
0.19
0.32
0.15
0.11
Blank spaces indicate laboratory accident or suspect data.
-------
-38-
TABLE 16
SOLUBLE ORTHOPHOSPHATE (mg/l-P) VALUES FROM THE CEDAR RIVER NEAR
THE DUANE ARNOLD ENERGY CENTER DURING 1983
Sampling Locations ^
Upstream 140 ft. 1/2 Mile
Upstream of Plant Discharge Downstream Downstream
of Plant Intake Canal of Discharge from Plant
j ^ 5 3 4
JAN 04
83
0.08
0.08
0.14
0.08
0.08
JAN 19
83
0.11
0.11
0.28
0.11
0.11
FEB 01
83
0.08
0.08
0.20
0.08
0.08
FEB 14
83
0.11
0.11
0.11
0.11
0.11
MAR 02
83
0.10
0.10
0.05
0.10
0.10
MAR 16
83
0.07
0.08
0.05
0.08
0.07
APR 05
83
0.13
0.10
0.11
0.10
0.10
APR 18
83
0.04
0.04
0.02
0.04
0.02
MAY 03
83
-------
-39-
TABLE 17
AMMONIA (mg/l-N) VALUES FROM THE CEDAR RIVER NEAR
THE DUANE ARNOLD ENERGY CENTER DURING 1983
Sampling Locations
Upstream 140 ft.1/2 Mile
Upstream of Plant Discharge Downstream Downstream
of Plant Intake Canal of Discharge from Plant
1 2 5 3 4
JAN
04
83
0.13
0.13
0.13
0.13
0.14
JAN
19
83
0.04
0.02
0.04
0.02
0.01
FEB
01
83
0.05
0.05
0.03
0.04
0.04
FEB
14
83
0.15
0.16
0.18
0.16
0.16
MAR
02
83
0.46
0.64
0.11
0.49
0.57
MAR
16
83
0.05
0.09
0.06
0.04
0.03
APR
05
83
0.08
0.07
0.42
0.07
0.06
APR
18
83
0.08
0.13
0.10
0.06
0.04
MAY
03
83
0.07
0.06
0.06
0.04
0.13
MAY
18
83
0.02
<0.01
0.06
<0.01
0.06
JUN
07
83
0.05
0.07
0.07
0.01
0.05
JUN
20
83
0.08
0.03
0.12
0.04
0.03
JUL
05
83
0.24
0.05
0.04
0.30
0.06
JUL
21
83
<0.01
<0.01
0.06
<0.01
<0.01
AUG
03
83
0.09
0.06
0.05
0.04
<0.01
AUG
18
83
0.03
<0.01
1.03
0.04
0.04
SEP
07
83
0.04
0.06
0.22
0.08
0.08
SEP
19
83
<0.01
<0.01
0.09
<0.01
0.01
OCT
05
83
0.06
0.01
0.01
0.01
0.08
OCT
19
83
0.01
<0.01
0.04
0.04
<0.01
NOV
02
83
0.08
0.05
0.16
0.04
0.06
NOV
17
83
0.37
0.34
0.34
0.23
0.42
DEC
08
83
0.12
0.12
0.14
0.10
0.12
DEC
20
83
0.12
0.26
0.26
0.10
0.19
-------
04 83
19 83
01 83
14 83
02 83
16 83
05 83
18 83
03 83
18 83
07 83
20 83
05 83
21 83
03 83
18 83
07 83
19 83
05 83
19 83
02 83
17 83
08 83
20 83
-40-
TABLE 18
NITRATE (mg/l-N) VALUES FROM THE CEDAR RIVER NEAR
THE DUANE ARNOLD ENERGY CENTER DURING 1983
Sampling Locations _
Upstream 140 ft. 1/2 Mi 1e
Upstream of Plant Discharge Downstream Downstream
of Plant Intake Canal of Discharge from Plant
2 5 3 4
11.5
11.5
17.4
11.5
11.5
12.2
13.9
17.2
13.9
13.9
9.7
11.9
12.0
11.9
9.7
7.6
7.5
8.0
7.4
7.6
6.7
6.8
2.6
6.8
6.6
8.4
8.5
6.4
8.3
8.2
8.8
8.5
2.1
8.8
7.8
24
19
17
19
18
9.1
9.6
9.0
9.1
8.5
8.8
8.7
13.2
8.5
6.8
6.6
6.6
6.1
6.5
8.8
7.5
6.3
6.1
7.2
7.0
7.4
7.4
14.5
7.7
7.3
8.6
8.8
21.1
9.0
9.0
4.2
5.8
12.7
8.1
5.3
2.5
2.3
9.9
2.5
2.4
2.9
2.2
4.3
2.5
2.1
3.4
3.2
7.6
4.2
3.3
5.7
5.3
5.2
5.5
5.1
7.0
7.0
6.2
7.0
7.0
14.6
12.8
21.2
10.5
9.1
7.9
8.1
19.3
9.3
8.1
9.5
9.2
11.4
10.2
9.2
10.6
10.7
13.7
11.2
11.8
-------
-41-
TABLE 19
TOTAL IRON (rag/1) VALUES FROM THE CEDAR RIVER NEAR
THE DUANE ARNOLD ENERGY CENTER DURING 1983
Sampling Locations
Upstream 140 ft. 1/2 Mile
Upstream of Plant Discharge Downstream Downstream
of Plant Intake Canal of Discharqe from Plant
12 5 34
JAN
04
83
1.72
2.07
2.50
2.18
JAN
19
83
0.21
0.21
0.58
0.17
0.25
FEB
01
83
0.31
0.71
0.24
0.22
0.45
FEB
14
83
0.23
0.18
0.24
0.20
0.18
MAR
02
83
1.11
1.24
0.12
0.80
0.59
MAR
16
83
1.01
0.75
0.31
0.74
0.67
APR
05
83
2.17
2.04
1.12
0.40
2.85
APR
18
83
1.11
1.01
1.19
0.98
0.96
MAY
03
83
1.54
1.79
0.49
1.71
0.37
MAY
18
83
1.44
1.56
2.86
1.17
1.44
JUN
07
83
1.52
1.52
1.75
1.86
1.32
JUN
20
83
2.89
1.51
0.69
2.00
3.04
JUL
05
83
2.28
1.74
4.20
2.22
1.44
JUL
21
83
2.07
2.85
6.04
2.13
2.39
AUG
03
83
1.84
2.01
4.58
2.53
2.15
AUG
18
83
0.59
0.54
0.80
0.51
0.31
SEP
07
83
0.19
0.44
1.91
1.07
0.48
SEP
19
83
0.75
0.75
3.98
0.78
0.75
OCT
05
83
1.16
1.43
2.34
1.41
0.70
OCT
19
83
0.69
0.92
0.82
0.98
1.01
NOV
02
83
0.84
0.89
3.80
0.96
1.16
NOV
17
83
0.38
0.31
2.57
<0.1
0.38
DEC
08
83
0.39
0.44
0.61
0.53
0.61
DEC
20
83
0.10
0.21
0.15
0.24
0.08
-------
-42-
TABLE 20
TANNINS AND LIGNINS- AS TANNIC ACID (mg/1) VALUES FROM THE CEDAR RIVER
NEAR THE DUANE ARNOLD ENERGY CENTER DURING 1983
Sampling Locations
Upstream 140 ft. 1/2 Mile
Upstream of Plant Discharge Downstream Downstream
of Plant Intake Canal of Discharqe from Plant
1 2 5 5 4
JAN 04 83
1.30
1.43
1.45
1.64
1.64
JAN 19 83
1.56
1.20
1.60
1.31
1.39
FEB 01 83
1.53
5.70
5.50
5.60
6.04
FEB 14 83
5.20
4.63
4.80
4.78
4.11
MAR 02 83
3.63
3.73
7.15
3.47
3.78
MAR 16 83
4.84
5.82
5.84
5.24
4.21
APR 05 83
2.34
2.22
1.03
2.21
2.25
APR 18 83
2.61
2.53
2.19
2.58
2.40
MAY 03 83
1.72
1.69
1.66
1.71
1.61
MAY 18 83
1.33
1.53
4.86
1.71
1.77
J UN 07 83
3.10
3.30
3.60
3.20
3.20
JUN 20 83
3.40
3.20
1.50
2.40
3.30
JUL 05 83
1.91
2.04
3.81
1.43
1.42
JUL 21 83
3.57
3.99
2.27
3.45
3.18
AUG 03 83
3.55
2.86
2.27
4.80
3.42
AUG 18 83
2.14
1.73
8.02
1.46
1.81
SEP 07 83
0.32
5.64
4.52
1.27
0.66
SEP 19 83
1.29
1.18
3.22
4.11
1.36
OCT 05 83
0.65
0.68
0.74
0.74
0.70
OCT 19 83
0.78
0.58
0.67
0.54
0.62
NOV 02 83
0.62
0.66
0.95
0.62
0.62
NOV 17 83
0.46
0.53
1.22
0.55
0.53
DEC 08 83
0.40
0.38
0.45
0.38
0.45
DEC 20 83
0.40
0.40
0.47
0.30
0.30
-------
-43-
TABLE 21
CHEMICAL OXYGEN DEMAND (mg/1) VALUES FROM THE CEDAR RIVER
NEAR THE DUANE ARNOLD ENERGY CENTER DURING 1983
Sampling Locations
Upstream' 140 ft. 1/2 Mile
Upstream of Plant Discharge Downstream Downstream
of Plant Intake Canal of Discharge from Plant
1 2 5 3 4
JAN 04 83
<20
<20
<20
<20
<20
JAN 19 83
<20
<20
<20
<20
<20
FEB 01 83
16
20
19
<15
20
FEB 14 83
16
24
30
28
30
MAR 02 83
46
48
27
48
46
MAR 16 83
26
22
<20
24
22
APR 05 83
41
34
17
34
34
APR 18 83
56
46
51
50
64
MAY 03 83
24
22
33
30
26
MAY 18 83
45
24
53
43
39
JUN 07 83
43
39
39
48
39
JUN 20 83
<25
<25
27
<25
26
JUL 05 83
48
37
80
40
27
JUL 21 83
42
37
79
39
41
AUG 03 83
39
35
79
58
43
AUG 18 83
44
68
136
75
62
SEP 07 83
67
65
112
53
60
SEP 19 83
75
66
155
80
98
OCT 05 83
41
32
35
28
32
OCT 19 83
67
48
79
56
67
NOV 02 83
69
48
162
44
51
NOV 17 83
69
24
163
65
51
DEC 08 83
35
61
63
68
57
DEC 20 83
114
88
65
89
48
-------
-44-
TABLE 22
BIOCHEMICAL OXYGEN DEMAND (5-day) (mg/1) VALUES FROM THE CEDAR RIVER
NEAR THE DUANE ARNOLD ENERGY CENTER DURING 1983
Sampling Locations
Upstream140 ft. 1/2 Mile
Upstream of Plant Discharge Downstream Downstream
of Plant Intake Canal of Discharqe from Plant
1 2 5 3 4
JAN 04 83
2.1
3.0
2.2
2.0
3.0
JAN 19 83
1.8
2.2
2.2
2.1
2.0
FEB 01 83
1.3
2.1
1.5
2.0
2.2
FEB 14 83
1.5
2.0
1.5
1.5
1.5
MAR 02 83
3.0
3.5
1.1
3.5
3.6
MAR 16 83
1.5
1.0
2.1
2.0
1.8
APR 05 83
2.8
2.1
2.2
2.1
2.2
APR 18 83
3.0
3.3
3.0
3.0
2.8
MAY 03 83
1.8
1.3
1.8
1.7
2.2
MAY 18 83
2.5
2.7
2.8
2.4
3.2
JUN 07 83
<1.5
<1.5
<1.5
2.1
2.0
JUN 20 83
2.2
2.2
3.6
2.1
2.1
JUL 05 83
3.8
4.0
4.3
3.6
4.5
JUL 21 83
<1.5
<1.5
2.8
1.6
2.1
AUG 03 83
2.0
3.0
4.4
3.2
3.6
AUG 18 83
11.7
11.8
10.0
12.0
12.2
SEP 07 83
10.6
11.4
11.1
13.5
12.4
SEP 19 83
6.3
7.2
>10.6
7.0
7.0
OCT 05 83
3.6
3.3
3.8
3.3
3.3
OCT 19 83
2.4
2.4
3.6
2.4
3.2
NOV 02 83
2.6
2.7
4.6
2.6
3.6
NOV 17 83
3.6
3.6
21.2
15.0
4.2
DEC 08 83
3.2
3.6
<2
3.3
3.0
DEC 20 83
3.0
2.6
2.9
2.1
2.6
-------
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
QUARTERLY CHEMICAL ANALYSIS - 1983
CI- N02-N S04~2 Cr+6 Cu Pb Mn Hg Zn
(mg/L) (mg/L) (mg/L) (yg/L)(yg/L) (yg/L) (yg/L) (yg/L) (yg/L)
May 18
Upstream-Lewis Access
17
^0.01
24
<2
10
3
160
<0.2
20
DAEC Upstream
17
<0.01
24
<2
7
3
140
<0.2
10
DAEC Downstream
17
<0.01
31
<2
6
4
140
<0.2
10
Mile Below Plant
31
<0.01
10
<2
6
4
150
<0.2
20
Discharge Canal
21
<0.01
354
<2
37
4
240
<0.2
10
August
3
Upstream-Lewis Access
22
<0.02
43
<2
14
13
100
<0.2
110
DAEC Upstream
22
<0o 02
37
<2
36
14
150
1.3
970
DAEC Downstream
32
<0.04
155
<2
24
14
130
<0,2
240
\ Mile Below Plant
23
<0.02
46
<2
20
18
100
<0.2
30
Discharge Canal
56
<0.08
570
<2
59
18
200
<0.2
110
November
2
Upstream-Lewis Access
27
<0.01
44
<3
6
9
40
<0.2
30
DAEC Upstream
26
<0.01
46
<3
6
2
60
<0.2
20
DAEC Downstream
28
0.01
85
<3
12
3
70
<0.2
20
^ Mile Below Plant
28
0.01
55
<3
6
<1
40
<0.2
20
Discharge Canal
63
0.03
970
15
50
9
80
<0.2
70
-------
-46-
TABLE 24
WATER TEMPERATURE, DISSOLVED OXYGEN, pH, AND ALKALINITY
DATA COLLECTED IN THE CEDAR RIVER DIEL STUDY CONDUCTED
AT DUANE ARNOLD ENERGY CENTER, 18 AND 19 MAY 1983
Dissolved
Time
Temperature ; Oxygen
PH
Alkalinity
Date
(Hrs)
(C)
(mg/1)
(Units)
(mq/1 -CaCO^)
Location 1
18 May
1983
0645
13.5
9.6
8.3
194
18 May
1983
1105
13.4
9.7
8.2
195
18 May
1983
1422
13.4
9.9
8.2
195
18 May
1983
1805
13.8
10.0
8.3
194
18 May
1983
2200
13.7
9.9
8.2
194
19 May
1983
0135
13.6
9.6
8.2
195
Location 2
18 May
1983
0615
13.6
9.7
8.3
194
18 May
1983
1005
13.6
9.9
8.2
195
18 May
1983
1505
13.6
10.0
8.3
195
18 May
1983
1850
13.8
10.0
8.3
194
18 May
1983
2240
13.8
9.9
8.2
195
19 May
1983
0210
14.1
9.5
8.2
193
Location 3
18 May
1983
0625
13.7
9.6
8.2
193
18 May
1983
1015
13.7
9.7
8.2
194
18 May
1983
1507
13.8
9.9
8.3
194
18 May
1983
1900
14.1
9.8
8.3
192
18 May
1983
2255
13.8
9.8
8.2
195
19 May
1983
0220
14.1
9.8
8.2
192
Location 4
18 May
1983
0620
13.6
9.6
8.2
194
18 May
1983
1010
13.6
9.9
8.2
195
18 May
1983
1510
13.6
9.9
8.2
194
18 May
1983
1855
13.8
9.9
8.2
194
18 May
1983
2250
13.8
9.8
8.2
196
19 May
1983
0215
14.2
9.7
8.2
192
Location 5
18 May
1983
0600
24.6
8.0
7.9
96
18 May
1983
1000
25.2
7.8
7.8
102
18 May
1983
. 1455
25.8
7.8
7.8
98
18 May
1983
1835
26.8
7.4
7.9
100
18 May
1983
2230
26.6
7.5
7.8
102
19 May
1983
0200
14.2
9.8
8.2
186
-------
-47-
TABLE 24(cont'd.)
WATER TEMPERATURE, DISSOLVED OXYGEN, pH, AND ALKALINITY
DATA COLLECTED IN THE CEDAR RIVER DIEL STUDY CONDUCTED
AT DUANE ARNOLD ENERGY CENTER, 4 AND 5 AUGUST 1983
Time Temperature
Date (Hrs) (C)
Di ssolved
Oxygen pH Alkalinity
(mg/1) (Units) (mg/l-CaCO^)
Location 1
4 Aug 1983
0645
26.1
7.7
8.4
224
4 Aug 1983
1055
26.0
9.0
8.3
218
4 Aug 1983
1450
27.4
10.6
8.6
221
4 Aug 1983
1910
27.9
10.8
8.5
221
4 Aug 1983
2300
27.0
9.9
8.6
223
5 Aug 1983
0235
26.6
8.9
8.6
220
Location
2
4 Aug 1983
0620
25.4
7.5
8.5
221
4 Aug 1983
1019
25.8
8.7
8.4
220
4 Aug 1983
1418
27.4
11.0
8.6
221
4 Aug 1983
1830
28.3
11.3
8.7
220
4 Aug 1983
2230
27.6
10.0
8.5
221
5 Aug 1983
0205
27.0
8.6
8.5
220
Location
3
4 Aug 1983
0630
25.4
7.6
8.5
221
4 Aug 1983
1030
26.0
8.9
8.4
219
4 Aug 1983
1430
28.0
10.6
8.6
219
4 Aug 1983
1840
28.3
10.5
8.7
220
4 Aug 1983
2235
27.6
8.5
8.6
220
5 Aug 1983
0210
26.8
8.7
8.5
218
Location
4
4 Aug 1983
0625
25.4
7.6
8.5
221
4 Aug 1983
1025
26.0
8.7
8.5
219
4 Aug 1983
1425
27.5
10.8
8.6
219
4 Aug 1983
1835
28.2
11.4
8.7
219
4 Aug 1983
2223
27.6
9.8
8.6
218
5 Aug 1983
0210
26.8
8.4
8-. 5
218
Location
5
4 Aug 1983
0615
25.6
7.7
8.5
219
4 Aug 1983
1015
31.1
6.4
7.7
84
4 'Aug 1983
1410
32.3
6.1
7.9
92
4 Aug 1983
1825
28.6
8.0
8.7
219
4 Aug 1983
2215
27.8
7.6
8.6
220
5 Aug 1983
0200
29.7
7.0
7.8
70
-------
MEAN ABUNDANCE AND PERCENT OCCURRENCE OF ZOOPLANKTON IDENTIFIED FROM ENTRAINMENT SAMPLES
COLLECTED IN THE CEDAR RIVER NEAR DUANE ARNOLD ENERGY CENTER, 1933
Taxa
February
No. /m3
14
%
No./m3
May 17
%
Nauplii
2565
12.6
10,577
7.7
Calanoid copepodites
0
0.0
0
0.0
Cyclopoid copepodites
34
0.2
, 291
0.2
"s Cyclops vernal is
0
0.0
, 0
0.0
•^C. bicuspidatus thomasi
6
<0.1
, 0
0.0
XDiaptomus sililoides
6
<0.1
. 0
0.0
vEucuclbps speratus
6
<0.1
, 0
0.0
TOTAL COPEPODA
2617
12.8
1 10,868
8.0
^Bosmina lingirostris
6
<0.1
~ i~ ~
, 0
0.0
^eriodaphnia pulchella
0
0.0
, 0
0.0
Chydorus sDhaericus
6
<0.1
1 0
0.0
xDaphnia parvula
0
0.0
0
0.0
TOTAL CLADOCERA
12
0.1
1
1 0
0.0
Bdelloid Rotifera
700
3.4
, 1579
1.2
Brachionus spp.
1691
8.3
, 13,418
9.8
Cephalodella spp.
0
0.0
. 631
0.5
Conochiloides spp.
95
0.5
i 0
0.0
Conochilus spp.
0
0.0
i 0
0.0
luchlanis spp.
0
0.0
, 0
0.0
Fiiinia spp.
32
0.2
, 4736
3.5
Kellicbttia sp.
0
0.0
, 0
0.0
Keratella spp.
1224
6.0
. 82,719
60.5
Lecane spp.
0
0.0
. 158
0.1
Lepadella spp.
0
0.0
I 158
0.1
Monostyla spp.
0
0.0
, 158
0.1
Notholca spp.
159
0.8
, 631
0.5
Notommata spp.
32
0.2
. 0
0.0
Notommatid rotifers
0
0.0
I 158
0.1
Polyarthra spp.
9561
46.9
. 4578
3.3
Pompholyx spp.
0
0.0
i 0
0.0
Synchaeta spp.
4256
20.9
, 16,733
12.2
Testudinella spp.
0
0.0
, 158
0.1
TOTAL ROTIFERA
17,750
87.1
' 125,815
|
92.0
TOTAL ZOOPLANKTON
20,379
• 136,683
4
/
rr
1
,o
Ho
0^0
c-»
W
N)
I
OD
I
4 /-fion
-------
TOTAL NUMBER OF FISH COLLECTED BY ALL SAMPLING METHODS ON THE CEDAR RIVER
NEAR THE DUANE ARNOLD ENERGY CENTER - MAY 17-18, 1983
^ -f i 2 hr u
7) *55L
LEWIS ACCESS
DAEC SITE
Baited
Baited
Electro-
Hoop
Electro-
Hoop
Total
Species
shocking
Seine
Net
shocking
Seine
Net
Numbei
Bluntnose minnow
3
Bullhead minnow
13
5
Common shiner
2
1
Bigmouth shiner
1
Sand shiner
8
1
Spotfin shiner
15
13
7
34
Creek chub
1
Carp
5
8
Redhorse sp.
1
Carpsucker sp.
15
Highfin carpsucker
6
Quillback carpsucker
4
1
2
1
River carpsucker
2
4
5
26
Bigmouth buffalo
2
Channel catfish
7
2
Johnny darter
1
Slenderhead darter
1
Black crappie
1
Smallmouth bass
1
Orange-spotted sunfish
3
2
Number of Individuals
28
73
8
50
45
0
204
Number of Species
5
14
3
6
7
0
20
H
&
W
N3
CT>
-------
TOTAL NUMBER OF FISH COLLECTED BY ALL SAMPLING METHODS ON THE CEDAR RIVER
NEAR THE DUANE ARNOLD ENERGY CENTER - AUG 2-3, 1983
LEWIS ACCESS
DAEC SITE
Baited
Baited
Electro-
Hoop
i
|
Electro-
Hoop
Total
Species
shocking
Seine
Net
1
I
shocking
Seine
Net
Number
Gizzard shad
1
2
1
i
12
Bluntnose minnow
1
2
I
2
Bullhead minnow
6
7
i
3
12
Suckermouth minnow
1
i
Horneyhead chub
1
I
Common shiner
i
19
Sand shiner
i
1
Spotfin shiner
4
34
I
7
118
Steelhead shiner
i
1
Carp
3
i
14
1
Quillback carpsucker
33
I
River carpsucker
3
1
i
11
10
Golden redhorse
2
I
1
Shorthead redhorse
i
2
Johnny darter
i
1
Yellow perch
I
1
Largemouth bass
1
i
1
Smallmouth bass
I
i
2
Black crappie
I
2
Wiite crappie
1
i
1
Green sunfish
1
2
i
1
Orange-spotted sunfish
2
I
1
3
Northern pike
1
i
Flathead catfish
1
i
1
Channel catfish
2
I
7
4
Number of Individuals
57
56
0 1
i
62
165
12
352
Number of Species
12
12
0 i
12
13
2
25
-------
TOTAL NUMBER OF FISH COLLECTED BY ALL SAMPLING METHODS ON THE CEDAR RIVER
NEAR THE DUANE ARNOLD ENERGY CENTER - NOV 1-2, 1983
LEWIS ACCESS
DAEC SITE
Baited
Baited
Electro-
Hoop
1 Electro-
Hoop
Total
Species
shocking
Seine
Net
1 shocking
Seine Net
Number
Bigmouth Buffalo
6
I
» 1
Bluntnose Minnow
2
38
• 1
4
Bullhead Minnow
3
38
l 1 9
6
Brassy Minnow
1
i
4
Suckermouth Minnow
i 1
1
Brook Silverside
1
i
Creek Chub
1
I
Bigmouth Siner
21
I
1
Common Shiner
1
i
Roseyface Shiner
i 2
Sand Shiner
225
I
Spotfin Shiner
13
60
• 53
91
Carp
12
i 15
Carpsucker sp.
3
i
Quillback Carpsucker
5
« 4
River Carpsucker
15
1
3
I 15
Golden Redhorse
2
1
I 5
Shorthead Redhorse
• 2
Central Stoneroller
1
• 2
Johnny Darter
3
I
Largemouth Bass
2
i
Smallmouth Bass
1
• 1
White Crappie
1
i
Green Sunfish
1
» 2
Orange-spotted Sunfish
8
i 2
Bluegill
5
i
Channel Catfish
1
3
i 5
Number of Individuals
77
398
3
[ 120
107 0
705
Number of Species
15
15
1
I 16
I
6 0
27
£
f
M
M
Os |
<--N Ol
O b-
O I
S3
rt
&.
-------
RESULTS OF 48-HR LIVE BASKET EXPERIMENTS ON CHANNEL CATFISH IN THE CEDAR RIVER
AND DISCHARGE CANAL OF THE DUANE ARNOLD ENERGY CENTER, AUG 3-5, 1983
Number of Live Organisms
Time
(hr)
i
i
Time
(hr)
Location
_0
jj
__6
12
24
48
1
i _0
_2
_6
12
24
48
2a
10
10
10
10
10
6
i 25.4
25.9
26.4
26.6
25.4
26.3
3b
10
10
10
10
10
7
' 27,8
i
27.4
27.6
28.0
25.4
26.9
5°
10
10
10
10
10
7
i 28.0
30.8
31.4
31.2
25.6
30.1
r1
M
N3
I
Ul
N>
I
(a) Immediately upstream of the Duane Arnold Energy Center
(b) Immediately downstream of the Duane Arnold Energy Center discharge
(c) In the discharge canal
-------
SUMMARY OF FISHERY STUDIES AT THE DUANE ARNOLD ENERGY CENTER 1979-1983
- Lewis Access (U/S) and DAEC site (D/S) -
Total j Total
Year Numbers!Species
ALL FISH COLLECTED
Numbers
D/S
Numbers
U/S
PercentiPercent
U/S D/S
GAMEFISH COLLECTED
Total | Total|Total. Percent of. Percent
Numbers! U/S | D/S | Total Fish| U/S Total
Percent
D/S Total
1979
1980
1981
1982
1983
1979-
1983
period
1,393
1,514
646
372
1,261
5,186
27
28
24
26
34
834
474
337
172
700
559
1,040
309
200
561
60
31
52
46
56
40
69
48
54
44
41
46
50
23
83
18
18
29
15
46
23
28
21
8
37
2.9
3.0
7.7
6.2
6.6
2,517 2,669
49
51
243 126 117
4.7
2.2
3.8
8.6
8.7
6.6
5.0
4.1
2.7
6.8
4.0
6.6
4.4
-------
COMPARISON OF AVERAGE YEARLY VALUES FOR SEVERAL PARAMETERS
IN THE CEDAR RIVER UPSTREAM OF DAEC* 1972-1983
Mean Flow Turbidity Total PO^ Ammonia Nitrate BOD5
Year (cfs) (JTU) (mg/L) (mg/L-N) (mg/L-N) (mg/L)
1972
4,418
22
1.10
0.56
0.23
5.7
1973
7,900
28
0.84
0.36
1.5
4.0
1974
5.580
29
2.10
0.17
4.2
4.7
1975
4,206
58
1.08
0.33
2.8
6.5
1976
2,082
41
0.25
0.25
2.8
7.3
1977
1,393
15
0.33
0.52
2.9
6.5
1978
3,709
23
0.26
0.22
4.4
3.3
1979
7,041
26
0.29
0.12
6.6
2.5
1980
4,523
40
0.34
0.19
5.4
4.3
1981
3,610
33
0.77
0.24
6.0
6.5
1982
7,252
43
0.56
0.23
8.0
5.1
1983
8,912
22
0.25
0.10
8.6
3.3
* Data from Lewis Access location (Station 1)
-------
SUMMARY OF RELATIVELY LOADING VALUES (AVERAGE ANNUAL CONC. X CUMULATIVE RUNOFF)
FOR SEVERAL PARAMETERS IN THE CEDAR RIVER UPSTREAM OF DAEC* 1972-1983
Year
Mean Flow
(cfs)
Cum. Runoff
(in)
Turbidity
RELATIVE
Total POij
LOADING VALUES
Ammonia
Nitrate
BODg
1972
4,418
9.24
203
10.2
5.2
2
53
1973
7,900
16.48
461
13.8
5.9
25
66
1974
5,580
11.64
338
24.4
2.0
49
55
1975
4,206
8.77
509
9.5
2.9
25
57
1976
2,082
4.35
178
1.1
1.1
12
32
1977
1,393
2.91
44
1.0
1.5
8
19
1978
3,709
7.74
178
2.0
1.7
34
26
1979
7,041
14.79
385
4.3
1.8
98
37
1980
4,523
9.45
378
3.2
1.8
51
41
1981
3,610
7.53
248
5.8
1.8
45
49
1982
7,252
15.13
651
8.5
3.5
121
77
1983
8,912
18.00
396
4.5
1.8
155
59
* Data from Lewis Access location (Station 1)
------- |