U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
SWAN LAKE
COLUMBIA COUNTY
WISCONSIN
EPA REGION V
WORKING PAPER No, 50
PACIFIC NORTHWEST ENVIRONMENTAL RESEARCH LABORATORY
An Associate Laboratory of the
NATIONAL ENVIRONMENTAL RESEARCH CENTER - CORVALLIS, OREGON
and
NATIONAL ENVIRONMENTAL RESEARCH CENTER - LAS VEGAS, NEVADA
6 GPO 697.032
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REPORT
ON
SWAN LAKE
COLUMBIA COUNTY
EPA REGION V
WORKING PAPER No, 50
WITH THE COOPERATION OF THE
WISCONSIN DEPARTMENT OF NATURAL RESOURCES
AND THE
WISCONSIN NATIONAL GUARD
OCTOBER, 1274
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1
CONTENTS
Page
Foreword
List of Wisconsin Study Lakes iv, v
Lake and Drainage Area Map vi
Sections
I. Conclusions 1
II. Introduction 3
III. Lake and Drainage Basin Characteristics 4
IV. Lake Water Quality Summary 5
V. Nutrient Loadings 10
VI. Literature Reviewed 15
VII. Appendices 16
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11
FOREWORD
The National Eutrophication Survey was initiated in 1972 in
response to an Administration commitment to investigate the nation-
wide threat of accelerated eutrophication to fresh water lakes and
reservoirs.
OBJECTIVES
The Survey was designed to develop, in conjunction with state
environmental agencies, information on nutrient sources, concentrations,
and impact on selected freshwater lakes as a basis for formulating
comprehensive and coordinated national , regional , and state management
practices relating to point-source discharge reduction and non-point
source pollution abatement in lake watersheds.
ANALYTIC APPROACH
The mathematical and statistical procedures selected for the
Survey’s eutrophication analysis are based on related concepts that:
a. A generalized representation or model relating
sources, concentrations, and impacts can be constructed.
b. By applying measurements of relevant parameters
associated with lake degradation, the generalized model
can be transformed into an operational representation of
a lake, its drainage basin, and related nutrients.
c. With such a transformation, an assessment of the
potential for eutrophication control can be made.
LAKE ANALYSIS
In this report, the first stage of evaluation of lake and water-
shed data collected from the study lake and its drainage basin is
documented. The report is formatted to provide state environmental
agencies with specific information for basin planning [ 3O3(e)], water
quality criteria/standards review [ 3O3(c)], clean lakes [ 3l4(a,b)],
and water quality monitoring [ lO6 and §305(b)] activities mandated
by the Federal Water Pollution Control Act Amendments of 1972.
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111
Beyond the single lake analysis, broader based correlations
between nutrient concentrations (and loading) and trophic condi-
tion are being made to advance the rationale and data base for
refinement of nutrient water quality criteria for the Nation’s
fresh water lakes. Likewise, multivariate evaluations for the
relationships between land use, nutrient export, and trophic
condition, by lake class or use, are being developed to assist
in the formulation of planning guidelines and policies by EPA
and to augment plans implementation by the states.
AC KNO WL EDGMENT
The staff of the National Eutrophication Survey (Office of
Research & Development, U. S. Environmental Protection Agency)
expresses sincere appreciation to the Wisconsin Department of
Natural Resources for professional involvement and to the Wis-
consin National Guard for conduct of the tributary sampling
phase of the Survey.
Francis H. Schraufnagel, Acting Assistant Director, and Joseph
R. Ball of the Bureau of Water Quality, and Donald R. Winter, Lake
Rehabilitation Program, provided invaluable lake documentation and
counsel during the Survey. Central Office and District Office per-
sonnel of the Department of Natural Resources reviewed the prelim-
inary reports and provided critiques most useful in the preparation
of this Working Paper series.
Major General James J. Lison, Jr., the Adjutant General of
Wisconsin, and Project Officer CW-4 Donald D. Erickson, who directed
the volunteer efforts of the Wisconsin National Guardsmen, are also
gratefully acknowledged for their assistance to the Survey.
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iv
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF WISCONSIN
LAKE NAME COUNTY
Altoona Eau Claire
Beaver Dam Barron
Beaver Dam Dodge
Big Eau Pleine Marathon
Browns Racine
Butte des Morts Winnebago
Butternut Price, Ashland
Castle Rock Flowage Juneau
Como Walworth
Crystal Vilas
Delavari Walworth
Eau Claire Eau Claire
Elk Price
Geneva Wal worth
Grand Green Lake
Green Green Lake
Kegonsa Dane
Koshkonong Jefferson, Rock, Dane
Lac La Belle Waukesha
Long Price
Middle Walworth
Nagawicka Waukesha
Oconomowoc Waukesha
Okauchee Waukesha
Petenwell Flowage Juneau
Pewaukee Waukesha
Pigeon Waupaca
Pine Waukesha
Poygan Winnebago, Waushara
Rock Jefferson
Rome Pond Jefferson, Waukesha
Round Waupaca
Shawano Shawano
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V
LAKE NAME COUNTY
Sinnissippi Dodge
Swan Columbia
Tainter Dunn
Tichigan Racine
Townhine Oneida
Trout Vilas
Wapogassett Polk
Wausau Marathon
Willow Oneida
Winnebago Winnebago, Fond Du Lac,
Cal umet
Wisconsin Columbia
Wissota Chippewa
Yellow Burnett
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-
I
I-.. —
cI
Wisconsin
Map Location
—.. •_\.
SWAN LAKE
® Tributary Sampling Site
X Lake Sampling Site
Sewage Treatment Facility
1 Direct Drainage Area Limits
p Mi.
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SWAN LAKE
STORET NO. 5545
I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate Swan Lake is eutrophic.
B. Rate-Limiting Nutrient:
Results of the algal assay indicate Swan Lake was nitrogen
limited at the time the sample was collected. However, lake
data indicate the lake may be phosphorus limited at times.
C. Nutrient Controllability:
During the Survey sampling year, there appeared to be a
significant phosphorus loss from Swan Lake. This would not be
expected in a lake with a retention time of almost one-half year,
and this leads to the assumption that the phosphorus loading data
do not reflect the actual inputs to the lake and/or the outputs.
The site selected as the inlet sampling station (A-4; see map,
page vi) was inaccessible because of the marshy terrain. Had this
station been sampled, about two more stream miles of non-point
contributions would have been included in the inputs. Also because
of inaccessibility due to marshes, it was necessary to sample the
Fox River outlet (A-i) at a point about three stream miles down-
stream from the actual outlet; and, thus, about three stream miles
of non-point contributions were added to the apparent outputs. It
is probable that had the actual inlet and outlet been sampled, the
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2
resulting increase in input and decrease in output would have
resulted in a phosphorus accumulation in Swan Lake.
In any case, it does not appear likely that reduction of
phosphorus in the effluent of the Pardeeville wastewater treat-
ment plant would result in improvement of the trophic condition
of Swan Lake commensurate with the cost of the treatment. It
is calculated that even a 100% removal of phosphorus at that
source would still leave a loading rate of 1 .74 g/m 2 /yr, or
more than twice that proposed by Vollenweider (in press) as
‘dangerous’; i.e., a eutrophic rate (see page 14).
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II. INTRODUCTION
Swan Lake is located in a glaciated area of Wisconsin, and the drainage
is in glacial drift. The economy of the area is based on agriculture, par-
ticularly the growing of canning crops.
The lake is used for boating and fishing. Game fish present include
northern pike, walleyes, largemouth bass, and panfish. Public access is
provided, but there are no resorts or boat liveries at the lake.
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4
III. LAKE AND DRAINAGE BASIN CHARACTERISTICS
A. Lake Morphometry:
1. Surface area: 406 acres.
2. Mean depth: 31.8 feet.
3. ‘1aximum depth: 82 feet.
4. Volume: 12,897 acre/feet.
5. Mean hydraulic retention time: 178 days.
B. Tributary and Outlet:
(See Appendix A for flow data)
1. Tributaries -
Name Drainage area* Mean flow*
Fox River 58.6 mi 2 31.8 cfs
Minor tributaries & 2
immediate drainage - 8.4 mi 4.8 cfs
Totals 67.0 mi 2 36.6 cfs
2. Outlet -
Fox River 67.6 mi 2 ** 36.6 cfs
C. Precipitation t :
1. Year of sampling: 42.7 inches.
2. Mean annual: 30.7 inches.
* Drainage areas are accurate within ±0.5%; mean daily flows are accurate
within ±40%; mean monthly flows are accurate within ±35%; and normalized
mean monthly flows are accurate within ±35%.
** Includes area of lake.
I See Working Paper No. 1, ‘Survey Methods”.
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5
IV. LAKE WATER QUALITY SUMMARY
Swan Lake was sampled three times during the open—water season of
1972 by means of a pontoon-equipped Huey helicopter. Each time, samples
for physical and chemical parameters were collected from two stations
on the lake and from a number of depths at each station (see map, page
vi). During each visit, a single depth-integrated (15 feet to surface)
sample was composited from the stations for phytoplankton identification
and enumeration; and during the last visit, a single five-gallon depth-
integrated sample was composited for algal assays. Also each time, a
depth-integrated sample was collected from each station for chlorophyll a
analysis. The maximum depths sampled were 40 feet at station 1 and 76
feet at station 2.
The results obtained are presented in full in Appendix B, and the
data for the fall sampling period, when the lake was essentially well-
mixed, are summarized below. Note however, the Secchi disc summary is
based on all values.
For differences in the various parameters at the other sampling
times, refer to Appendix B.
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6
A. Physical and chemical characteristics:
FALL VALUES
(11/10/72)
Parameter Minimum Mean Median Maximum
Temperature (Cent.) 7.0 7.3 7.3 7.4
Dissolved oxygen (mg/i) 4.1 6.0 5.3 8.7
Conductivity (pmhos) 410 415 415 420
pH (units) 7.5 7.6 7.6 7.8
Alkalinity (mg/i) 182 195 195 214
Total P (mg/i) 0.123 0.168 0.170 0.235
Dissolved P (mg/i) 0.108 0.151 0.156 0.206
NO + NO (mg/i) 0.090 0.107 0.095 0.190
Am onia mg/i) 0.600 0.828 0.860 1.120
ALL VALUES
Secchi disc (inches)
24 80
93 108
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7
B. Biological characteristics:
1 . Phytoplankton —
Sampling Dominant Number
Date Genera per ml
06/22/72 1 . Fragilaria 1 ,687
2. Chroococcus 361
3. Dinobryon 346
4. Gloeocapsa 166
5. Microcystis 136
Other genera 406
Total 3,102
08/20/ 72 1 . Merismopedia 2,043
2. Anabaena 1,953
3. Dinobryon 452
4. Fragilaria 398
5. Melosira 217
Other genera 868
Total 5,931
11/10/72 1 . Anabaena 268
2. Lyngbya 253
3. Melosira 61
4. Flagellates 36
5. Stephanodiscus 29
Other genera 94
Total 741
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8
2. Chlorophyll a -
(Because of instrumentation problems during the 1972 sampling,
the following values may be in error by plus or minus 20 percent.)
Sampling Station Chlorophyll a
Date Number ( pg/i )
06/22/72 01 7.3
02 2.3
08/20/7 2
11/10/72 01
02
C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked -
Ortho P Inorganic N
___________ Coric. (mg/i) Conc. (mg/i ) _____________
0.138 0.740
0.144 0.740
0.150 0.740
0.162 0.740
0.198 0.740
0.198 10.740
0.138 10.740
2. Discussion -
The control yield of the assay alga, Selenastrum capri-
cornutum , indicates that Swan Lake had a high level of poten-
tial productivity at the time the sample was collected. Also,
the lack of significant change in yields with increased levels
of orthophosphorus, until nitrogen was also added, shows that
01
02
Spike (mg/i )
Control
0.006 P
0.012 P
0.024 P
0.060 P
0.060 P + 10.0 N
10.0 N
7.0
10.6
10.7
11.2
Maximum yield
( mg/i-dry wt. )
17.2
19.0
20.8
18.0
17.4
91 .1
70.1
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9
the system was nitrgoen limited when sampled. Note that the
addition of only nitrogen resulted in a yield far greater than
the control yield.
The lake data indicate that Swan Lake may be phosphorus
limited at times. During the August and November sampling
periods, the nitrogen to phosphorus ratios obtained were about
6 to 1 (nitrogen limitation would be expected). However, during
the June sampling the N/P ratio was about 16/1; i.e., phosphorus
limitation would be expected at that time.
A number of other Survey lakes have exhibited a similar
temporal shift in limiting nutrient, including Shagawa Lake
in Minnesota which has been intensively studied by personnel
of the National Eutrophication Branch of EPA.
D. Trophic Condition:
Survey data indicate that Swan Lake is eutrophic. Algal blooms
are said to be frequent, and rooted aquatic vegetation occurs
in about 25% of the littoral zone.
Of the 46 Wisconsin lakes included in the Survey, 37 had less
mean total phosphorus, 40 had less mean inorganic nitrogen, and
18 had less mean chlorophyll a. Oxygen depression with depth was
noted during the June sampling, and oxygen depletion occurred at
about 30 feet in August.
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10
V. NUTRIENT LOADINGS
(See Appendix C for data)
For the determination of nutrient loadings, the Wisconsin National
Guard collected a monthly near-surface grab sample from tributary sites
A-i, A-2, and A-5 (see map, page vi), except for the high runoff months
of April and May, when two samples were collected. Sampling was begun
in September, 1972, and was completed in August, 1973.
Sampling sites A-3 and A-4 shown on the map were found to be inacces-
sible because of swampy terrain, and no samples were collected from those
sites. Because of this, the inlet nutrient loads had to be calculated
indirectly by using the combined mean nutrient concentrations in the sys-
tem at stations A-2 and A-5 and the mean flow at station A-4. The nutrient
loads shown for the Fox River inlet in the following loading tables do not
include the loads attributed to the Pardeeville wastewater treatment plant.
Through an interagency agreement, stream flow estimates for the year
of sampling and a “normalized” or average year were provided by the Wisconsin
District Office of the U.S. Geological Survey for the tributary sites near-
est the lake.
In this report, nutrient loads for unsampled “minor tributaries and
immediate drainage” (“ZZ” of U.S.G.S.) were calculated using the combined
mean concentrations in the system at stations A-2 and A-5 and ZZ flows.
The Village of Pardeeville declined participation in the Survey, and
nutrient loads attributed to that source are estimates based on the 1970
census and annual per capita contributions of 2.5 lbs of phosphosus and
7.5 lbs of nitrogen.
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11
A. Waste Sources:
1. Known municipal -
Pop. Mean Receiving
Name Served Treatment Flow (mgd) Water
Pardee- 1,507 Trickling 0.150* Fox River
ville filter
2. Known industrial -
Mean Receiving
Name Product Treatment Flow (mgd) Water
Pardee- peas & Seepage ? Park Lake (?)
yule corn lagoon
Canning
Co.
* Estimated at 100 gal/capita/day.
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12
B. Annual Total Phosphorus Loading - Average Year:
1 . Inputs -
lbs P1 % of
Source yr total
a. Tributaries (non-point load) -
Fox River 5,390 53.5
b. Minor tributaries & immediate
drainage (non-point load) - 810 8.1
c. Known municipal SIP’s -
Pardeeville 3,770 37.4
d. Septic tanks* - 40 0.4
e. Known industrial -
Pardeeville Canning Co. ?
f. Direct precipitation** - 60 0.6
Total 10,070 100.0
2. Outputs -
Lake outlet - Fox River 11,900
3. Net annual P loss - 1 ,830 pounds
* Estimated 60 dwellings on lakeshore; see Working Paper No. 1.
** Estimated; see Working Paper No. 1.
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13
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
lbsN/ %of
Source yr total
a. Tributaries (non-point load) -
Fox River 109,840 76.8
b. Minor tributaries & immediate
drainage (non-point load) - 16,540 11.6
c. Known municipal SIP’s -
Pardeeville 11,300 7.9
d. Septic tanks* — 1,410 1.0
e. Known industrial -
Pardeeville Canning Co. ?
f. Direct precipitation** - 3,910 2.7
Total 143,000 100.0
2. Outputs -
Lake outlet - Fox River 126,740
3. Net annual N accumulation - 16,260 pounds
* Estimated 60 dwellings on lakeshore; see Working Paper No. 1.
** Estimated; see Working Paper No. 1.
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14
D. Mean Annual Non-point Nutrient Export by Subdrainage Area:
Tributary lbs P/mi 2 /yr lbs N/mi 2 /yr
Fox River 92 1 ,874
E. Yearly Loading Rates:
In the following table, the existing phosphorus loading
rates are compared to those proposed by Vollenweider (in press).
Essentially, his “dangerous” rate is the rate at which the
receiving waters would become eutrophic or remain eutrophic; his
“permissible” rate is that which would result in the receiving
water remaining oligotrophic or becoming oligotrophic if mor-
phometry permitted. A mesotrophic rate would be considered one
between “dangerous” and “permissible”.
Total Phosphorus Total Nitrogen
Units Total Accumulated Total Accumulated
lbs/acr /yr 24.8 loss* 352.2 40.0
grams/rn /yr 2.78 - 39.5 4.5
Volle weider loading rates for phosphorus
(g/rn /yr) based on mean depth and mean
hydraulic retention time of Swan Lake:
“Dangerous” (eutrophic rate) 0.86
“Permissible” (oligotrophic rate) 0.43
* See “Nutrient Controllability”, page 1.
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15
VI. LITERATURE REVIEWED
Anonymous, 1972. Wisconsin lakes. Publ. 218-72, Dept. Natural
Resources, Madison.
Schraufnagel, F. H., L. A. Montie, J. R. McKersie, and Donald Winter,
1967. Report on an investigation of the pollution in the Upper
Fox River basin made during 1966 and early 1967. Dept. of Natural
Resources, Madison.
Vollenweider, Richard A., (in press). Input-output models. Schweiz
A. Hydrol.
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VII. APPENDICES
APPENDIX A
TRIBUTARY FLOW DATA
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TRIBUTARY FLOW INFORMATION FOR WISCONSIN 9/30/74
LA’(E CODE 5545 SWAN LAIcE
TOTAL DRAINAGE AREA OF LAKE 67.60
SUB-DRAINAGE NORMALIZED FLOWS
TRIBUTARY AREA JAN FEB MAR APP MAY JUN JUL AUG SEP OCT NOV DEC MEAN
554 5A1 67.60 17.30 29.50 65.00 68.00 42.70 59.90 30.50 24.40 30.50 26.40 24.40 21.30 36.62
5545A4 54.60 19.00 25.00 58.00 58.00 34.00 51.00 26.00 19.00 24.00 24.00 24.00 20.00 31.81
SS4 SZZ 9.00 2.30 3.90 8.50 8.90 5.60 7.90 3.90 3.20 4.00 3.50 3.10 2.80 4.79
SUMMARY
TOTAL DRAINAGE AREA OF LAKE = 67.60 TOTAL FLOW IN = 439.60
SUM OF SUB—DRAINAGE AREAS = 67.60 TOTAL FLOW OUT = 439.90
MEAN MONTHLY FLOWS AND DAILY FLOWS
TRIBUTARY MONTH YEAR MEAN FLOW DAY FLOW DAY FLOW DAY FLOW
5S45A1 9 72 66.00 24 68.00
10 72 80.00 14 60.00
11 72 69.00
12 72 45.00 10 42.00
73 110.00
2 73 78.00 11 65.00
3 73 240.00 14 320.00
4 73 150.00 7 130.00 20 170.00
5 73 170.00 3 210.00 17 140.00
6 73 75.00 24 64.00
7 73 33.00 18 28.00
8 73 29.00 16 27.00
5 545A4 9 72 50.00 24 51.00
10 72 60.00 14 46.00
II 72 52.00
12 72 34.00 10 32.00
1 73 85.00
? 73 50.00 11 49.00
3 73 2)0.00 14 280.00
4 73 130.00 7 110.00 20 150.00
5 73 150.00 3 190.00 17 120.00
6 73 58.00 24 49.00
7 73 25.00 14 22.00
4 73 23.00 16 21.00
S S4 SZZ 9 72 1.40 24 1.40
10 72 1.70 14 1.30
11 72 1.40
12 72 1.00 10 0.90
1 73 2.50
2 73 1.80 11 1.50
3 73 34.00 14 48.00
4 73 20.00 7 17.00 20 21.00
5 73 23.00 3 28.00 17 18.00
6 73 1.80 24 1.50
7 73 0.80 18 0.70
8 73 0.70 16 0.60
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APPENDIX B
PHYSICAL and CHEMICAL DATA
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STORET RETRIEVAL DATE 74/09/30
554501
43 32 48.0 089 21 06.0
SWAN LAKE
55 WISCONSIN
1 1EPALES 2111202
3 0018 FEET DEPTH
DATE
TIME DEPTH
FROM
OF
TO
DAY FEET
12/06/22
17 10 0000
17 30 0015
21.6
16.8
72/08/20
16 IS 0000
16 15 0004
16 15 0015
16 15 0020
16 15 0030
16 15 0040
26.1
20.7
18.9
8.0
6.4
7/11/10
08 40 0000
08 40 0004
08 40 0015
08 40 0022
08 40 0036
7.3
7.3
7.2
7.0
DATE
TIME DEPTH
32211
CHLRPHYL
FROM
OF
A
TO
DAY FEET
LJG/L
72/06/2?
17 30 0000
7.3J
72/08/20
16 15 0000
7.OJ
7?/1I/1O
08 40 0000
10.TJ
00010
00300
00077
00094
00400
00410
00630
00610
00665
00666
WATER
DO
TRANSP
CNDUCTVY
PH
T ALK
N02&N03
NH3—N
PHOS—TOT
PHOS—DIS
TEMP
SECCHI
FIELD
CACO3
N—TOTAL
TOTAL
CENT
MG/L
INCHES
MICROMHO
SU
MG/L
MG/L
MG/L
MG/L P
MG/L P
11.6
96
310
8.80
180
0.100
0.070
0.072
0.020
5.4
325
319
8.10
8.75
186
155
0.280
0.060
0.240
0.080
0.032
0.090
0.010
0.014
10.4
320
8.75
158
0.060
0.070
0.038
0.012
0.7
360
8.68
169
0.050
0.100
0.021
0.009
0.6
360
7.65
171
0.050
0.150
0.030
0.013
0.3
360
7.70
162
0.060
0.080
0.022
0.012
0.0
410
420
7.25
7.80
188
214
0.050
0.110
1.680
0.720
0.350
0.149
0.265
0.132
7.2
410
7.80
198
0.110
0.770
0.141
0.134
7.0
410
7.80
198
0.120
0.730
0.148
0.135
7.3
420
7.60
198
0.110
0.740
0.140
0.131
8.7
420
7.60
200
0.190
0.600
0.123
0.108
J VALUE KNOWN TO BE IN ERROR
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STOPET RETRIEVAL DATE 74/09/30
554502
43 32 36.0 089 22 36.0
SWAN LAKE
55 WISCONSIN
1LEPALES 2111202
3 0020 FEET DEPTH
00010 00300 00077 00094 00400 00410 00630 00610 00665 00666
DATE TIME DEPTH WATER DO TRAMSP CNDUCTVY PH T ALK M02&N03 NH3—N PHOS-TOT PHOS—DIS
FROM OF TEMP SECCHI FIELD CACO3 N—TOTAL TOTAL
TO DAY FEET CENT ‘lOlL INCHES HICROPIHO SU MG/L HG/L MG/L MG/L P MG/I P
72/06/22 18 00 0000 21.6 11.3 90 310 8.80 174 0.100 0.040 0.030 0.016
18 00 0015 19.8 9.5 310 8.70 177 0.150 0.100 0.024 0.023
72/08/20 15 40 0000 24 305 8.88 142 0.060 0.090 0.030 0.013
15 40 0004 26.9 13.8 305 8.90 142 0.080 0.100 0.028 0.014
15 40 0015 21.9 4.2 335 8.10 179 0.050 0.610 0.081 0.050
15 40 0025 13.6 390 7.40 192 0.070 1.240 0.071 0.210
15 40 0035 6.8 0.0 400 7.30 192 0.130 1.760 0.377 0.325
15 40 0046 6.2 0.0 405 7.20 194 0.050 1.640 0.373 0.327
(5 40 0056 6.1 0.0 410 7.20 198 0.050 1.700 0.383 0.340
15 40 0066 6.0 0.04 405 7.20 200 0.130 1.020 0.425 0.38S
15 40 0076 5.9 0.0 403 7.20 198 0.150 2.420 0.397 0.332
72111/10 08 10 0000 108 420 7.60 188 0.100 0.860 0.176 0.156
08 10 0004 7.4 5.3 420 7.60 188 0.090 0.860 0.166 0.156
08 10 0015 7.3 5.3 420 7.60 186 0.090 0.860 0.175 0.156
08 10 0022 7.4 5.2 410 7.50 182 0.090 0.870 0.184 0.158
08 10 0030 7.4 5.2 410 7.50 192 0.090 0.890 0.179 0.162
08 10 0040 7.3 5.1 410 7.50 202 0.090 0.920 0.199 0.177
08 10 0051 7.3 4.1 410 7.50 192 0.090 1.120 0.235 0.206
32217
DATE TIME DEPTH CHLRPHYL
FROM OF A
TO DAY FEET iJG/L
77/06/22 18 00 0000 2.3J
72/08/20 15 40 0000 lO.6J
72/11/10 08 10 0000 11.2J
J VALUE KNOWN TO BE IN ERROR
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APPENDIX C
TRIBUTARY DATA
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ST3RET ET’RjEVAL DATE 74/lu/u?
554 5A1 LS S54 SA I
43 ?3 00.0 0 ? 30.1)
FOX “JVE
1 ‘u TAc,E
O/S AN LAKE
O J TREST.5 1 E POr’UAGE SIP
l1’E ALES 2H12 04
0000 FEET DE1 TI-i
0D ’30 0’)6?5 006 )0 0067 ) 0u66 5
OATE TIMr DF TI ‘JQ? ,N03 TOT KJEL Nr 3—N ‘ HOS—DlS Pi -IOS—TOT
QP N—TOTAL N TOTAL O T-4()
TO DAY FEET Mc,/L 1G/L MG/L MG/L P
7’/0 /? ’ 0.140 1.100
7?/)0/t 10 00 0.240 1.200 0.?°0 0.034 0.066
7’/ )I/ ll 0 30 0.360 1.700 0.30? 0.1?0 0.l .0
7?fi)/10 10 00 0.160 0.3’ 9 0.095
71/01/14 13 30 0.V ,0 1.? 60 0.360 0. Ok S 0.115
71/01/14 OM 30 C’.7 0 1.400 C.290 0.060 0.l4
71/04/07 12 00 0.770 1.O Su 0.0 4 0.060
71/05/01 07 15 ?.OM O 0.600 0.054 0.073 0.150
71/o /17 1? 45 0.l6 1.400 0.021 0.03? 0.063
73/O6/? 0.039 1.150 0.720 0.210 0. 0
7 /07/l 0.0 ? ) S43 0.360 0.310 0.400
73/0’ /16 0 00 0.056 1.400 0.?9 0.?50 0.315
V.’L J r \J)t s TD r LL- ’
1 1 \ I’rjTcAr )
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ST )PET RETRTEVAL DATE 74/10/02
5545A? LSSS45A2
.3 32 30.0 089 18 00.0
FOX RIVER
55 15 P(WTAGE
T/SWAN LAKE
ST HWY 2? BROG AbOVE PARDEEVILLE STP
1IEPALES 2111204
4 0000 FEET DEPTH
001530 00625 00610 00 71 00665
DATE T1 E OEPTd N02&NO1 TOT KJEL NH3-N PHOS—DIS PHOS-TOT
FPOP or N—TOTAL TOTAL OPTHO
TO DAY FEET MG/L ‘iG/L MG/L MG/L P MG/L P
‘/oq/?4 10 40 0.0815 1.450 0.168 0.010 0.064
72/10/1 ’ 09 30 0.084 1.?50 0.170 0.021 0.052
72/11/11 09 20 0.2Q0 1.300 0.031 0.012 0.033
72/12/10 09 30 0.370 0.870 0.044 0.011 0.025
71/02/11 09 00 1.440 1.900 0.490 0.100 0.200
73/03/14 05 20 0.680 1.540 0.500 0.100 0.260
73/04/07 11 28 0.2Q4 1.t00 0.030 0.007
73/04/20 11 55 0.210 1.OB O C.031 0.005K 0.035
73/05/03 16 30 0.0 1 0.9f fl 0.019 0.0?! 0.067
71/05/17 1? 25 0.1?0 1.100 0.01? 0.008 0.045
73/06/?4 0.010K 1.150 0.036 0.084 0.145
73/07/18 0.015 1.760 0.039 0.027 0.113
71/08/1 08 25 0.014 1.6’)O 0.044 0.032 0.125
K VL LUL ‘JUt9J If) LESS
Th’N I’\DfCATc )
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ST )PET . F:TP1EVAL DATE 74/10/0?
5545A5
43 3? 45.0 9 1E4 15.0
f A PIVEP
L 55545A5
55 )5 POPTAC,F
1/SwAN LAr E
- Y 22 F4 DG N EDGE PA DEEV1LLE
11E ’ALFS 211120 ’ .
4 0000 FEET
DEPTH
00633
006?
00610
00671
00665
DATE
TIME
fl1”T’-I
NQ? NO3
TOT KJEL
NH3—N
°FIOS—D1S
PHOs—TOT
F PO ’ -
OF
‘J—TOTAL
TOTAL
O TrIO
T v)
f’.AY
Fi ET
MG/L
G/L
(/L
Mr,/L P
MG/L P
7’J0 - /74
17
00
0.&)
1.200
0.121
0.046
0.060
77/10/14
09
0
0.160
1.?00
0.16R
0.015
0.04’-
7 /11/11
09
00
0.3’O
1.100
0.0?4
0.010
0.031
7?/1?/10
oq
00
0.700
0.920
0.054
0.011
0.02H
71/0 /11
0
50
1.60)
1. 00
0.520
0.105
0.1 ’ 3
71/0 /1Le
35
00
3.300
1.600
9.310
0.07?
0.100
73/04/07
11
10
0.310
1.470
0.01
0.005K
71/04/20
13
45
0.190
1.100
0.031
0.005 K
0.030
71/05/03
16
00
0.075
0. 60
0.017
0.011
0.045
71/05/17
12
30
0.010K
1.200
0.010
0.005K
0.049
71/0 ’/?6
0.R70
?.400
0.147
0.05?
0.125
7 1/01/IM
0.6 0
1. ’O0
0.097
0.020
0.100
71/Oel/16
08
20
0.590
1.400
0.064
0.021
0.10’)
K I’tLIJ- TJ r Lt’S
Tri’ I I’i)IC\T )
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