U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
SHAWANOLAKE
SHAWANO COUNTY
WISCONSIN
EPA REGION V
WORKING PAPER No,
PACIFIC NORTHWEST ENVIRONMENTAL RESEARCH LABORATORY
An Associate Laboratory of the
NATIONAL ENVIRONMENTAL RESEARCH CENTER - CORVALLIS, OREGON
and
NATIONAL ENVIRONMENTAL RESEARCH CENTER - LAS VEGAS, NEVADA
iraro—597.032
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REPORT
ON
SHAWANOLAKE
SHAWANO COUNTY
WISCONSIN
EPA REGION V
WORKING PAPER No,
WITH THE COOPERATION OF THE
WISCONSIN DEPARTMENT OF NATURAL RESOURCES
AND THE
WISCONSIN NATIONAL GUARD
OCTOBER, 1974
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1
CONTENTS
Page
Foreword ii
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 11
VI. Literature Reviewed 16
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11
FOREWO RD
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)J, 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.
ACKNOWLEDGMENT
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
Delavan Walworth
Eau Claire Eau Claire
Elk Price
Geneva Walworth
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
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V
LAKE NAME COUNTY
Rock Jefferson
Rome Pond Jefferson, Waukesha
Round Waupaca
Shawano Shawano
Sinnissippi Dodge
Swan Columbia
Ta inter Dunn
Tichigan Racine
Townline 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 —
SHAWANO LAKE
®Tributary Sampling Site
X Lake Sampling Site
r’ Direct Drainage Area Limits
0 1 2
Scale
r
____ — M N INEECO._ ____ — ______ — ____ —
SHAWANO GO.
Map Location
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SHAWANO LAKE
STORET NO. 5539
I. CONCLUSIONS
A. Trophic Condition:
Shawano Lake is eutrophic. Survey data indicate the trophic
condition of this lake is more likely due to morphometry than to
cultural influences.
B. Rate-Limiting Nutrient:
Algal assay results and lake data indicate Shawano Lake was
phosphorus limited during the sampling year.
C. Nutrient Controllability:
Point sources--Except for septic tanks there were no
known point sources contributing nutrients to Shawano Lake
during the sampling year. In fact, during that time, the lake
received a total phosphorus load at a rate less than that pro-
posed by Vollenweider (in press) as “permissible”; i.e., an
oligotrophic rate (see page 15).
As for the septic tanks, the Shawano Lake Sanitary District
is constructing a collection system (essentially completed as
this report was written) and a treatment plant to serve lakeshore
residences as well as provide treatment for the sewage from the
City of Shawano. Phosphorus removal is included in the treatment,
and the effluent will be discharged to the Wolf River downstream
from the City of Shawano.
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2
2. Non-point sources--The non-point nutrient exports of the
sampled tributaries were somewhat low as compared to Wisconsin
streams elsewhere (see page 15).
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II. INTRODUCTION
Shawano Lake is in the Wolf River drainage basin of northeastern
Wisconsin (see map, page vi). Land use in the immediate drainage of
the lake is primarily agricultural.
Recreational uses of the lake include swimming, boating, and fishing.
Game fish present include muskellunge, northern pike, largemouth bass, and
panfish. Although much of the shoreline is privately owned and extensively
developed, particularly along the north and west shores, public access is
provided and boats and services are available commercially.
The lake basin is relatively shallow, and the extensive littoral zone
supports abundant growths of emergent and submergent aquatic plants.
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4
III. LAKE AND DRAINAGE BASIN CHARACTERISTICS
A. Lake Morphometry*:
1. Surface area: 6,156 acres.
2. Mean depth: 10.6 feet.
3. Maximum depth: 35 feet.
4. Volume: 65,044 acre/feet.
5. Mean hydraulic retention time: 1.5 years.
B. Tributary and Outlet:
(See Appendix A for flow data)
1 . Tributaries -
Name Drainage areat Mean f1ow
Loon Lake Outlet 15.1 mi 2 13.4 cfs
Pickerel Creek 17.4 mi 2 11.4 cfs
Minor tributaries & 2
immediate drainage - 32.8 mi 34.0 cfs
Totals 65.3 mi 2 58.8 cfs
2. Outlet -
Shawano Lake Outlet 74.9 mi 2 58.8 cfstt
C. Precipitationttt:
1. Year of sampling: 37.1 inches.
2. Mean annual: 30.4 inches.
* DNR lake survey map (1941).
t 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%.
it Includes area of lake; outlet flow adjusted to equal sum of inflows.
ttt See Working Paper No. 1, “Survey Methods”.
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5
IV. LAKE WATER QUALITY SUMMARY
Shawano 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 three
stations on the lake and from two or more depths at each station (see
map, page vi). During each visit, a single depth-integrated (15 feet
or near bottom 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 col-
lected from each of the stations for chlorophyll a analysis. The
maximum depths sampled were 25 feet at station 1, 16 feet at station
2, and 4 feet at station 3.
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
(11/08/72)
Parameter Minimum Mean Median Maximum
Temperature (Cent.) 5.6 5.7 5.7 5.8
Dissolved oxygen (nig/l 10.5 11.1 11.1 11.7
Conductivity (pmhos) 230 233 235 240
pH (units) 7.7 7.7 7.7 7.8
Alkalinity (mg/i) 101 104 104 108
Total P (mg/l) 0.012 0.015 0.016 0.019
Dissolved P (mg/i) 0.006 0.008 0.008 0.009
NO + NO (mg/i) 0.040 0.042 0.040 0.050
AJonia mg/l) 0.050 0.056 0.050 0.070
ALL VALUES
Secchi disc (inches) 64 81 84 96
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7
B. Biological characteristics:
1. Phytoplankton -
Sampling Dominant Number
Date Genera per ml
06/22/72 1. Fragilaria 2,242
2. Flagellates 506
3. Dinobryon 289
4. Synedra 271
5. Melosira 235
Other genera 1 ,195
Total 4,738
08/ 24/72 1 . Polycystis 673
2. Anabaena 304
3. Fragilaria 166
4. Flagellates 166
5. Cryptomonas 152
6. Tabellaria 145
Other genera 782
Total 2,388
11/08/72 1. Dinobryon 1,229
2. Microcystis 788
3. Asterionella 239
4. Fragilaria 145
5. Synedra 108
Other genera 528
Total 3,037
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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/l )
06/22/72 01 10.5
02 35.7
03 7.7
08/24/72
C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked -
Ortho P Inorganic N
___________ Conc. (mg/l) Conc. (mg/i )
0.008 0.093
0.014 0.093
0.020 0.093
0.032 0.093
0.068 0.093
0.068 10.093
0.008 10.093
Spike (mall )
Control
0.006 p
0.012 P
0.024 P
0.060 P
0.060 P + 10.0 N
10.0 N
2. Discussion -
Maximum yield
( mg/i-dry wt. )
0.7
1.9
2.1
2.2
2.0
29.4
0.8
The control yield of the assay alga, Selenastrum capri-
cornutum , indicates that the potential primary productivity
of Shawano Lake was relatively low at the time the sample
was collected. Also, the increased yield resulting from the
0.006 mg/l orthophosphorus spike and the lack of response to
11/08/72
01
02
03
01
02
03
9.0
7.7
6.6
10.0
9.7
10.0
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9
the addition of only nitrogen indicate the lake was phosphorus
limited.
Note, however, that succeeding ortho-P spikes did not
result in significantly increased yields until nitrogen was
also added. This indicates that if orthophosphorus concen-
trations in the lake were increased to about 0.015 mg/i, the
lake would become nitrogen limited.
The lake data indicate a phosphorus-limited condition
during the other sampling periods as well. Nitrogen to
phosphorus ratios were 17 to 1 in June and 16 to 1 in August;
i.e., phosphorus limitation would be expected.
D. Trophic Condition:
The records of others indicate that Shawano Lake is eutrophic
and that it probably would have been considered eutrophic even
before cultural impacts began (Ketelle and Uttorniark, 1971). The
basin is relatively shallow, and the extensive littoral zones are
conducive to the growth of aquatic plants.
Considering Survey data only, it could be concluded that the
trophic condition of the lake was much better than the records of
others indicate. Of the 46 Wisconsin lakes studied, 79% had
greater mean total phosphorus, 90% had greater mean inorganic
nitrogen, 81% had less Secchi disc transparency, and 77% had
higher algal assay control yields.
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10
As for nutrient loading rates, during the sampling year
Shawano Lake was quite comparable to the oligotrophic lakes
Sebago and Moosehead in Maine.
It is concluded, therefore, that the trophic condition of
Shawano Lake is more likely due to morphometry than to cultural
influences.
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11
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 each or the
tributary sites indicated on the map (page vi), except for the high
runoff months of April and May when two samples were collected. Samp-
ling was begun in September, 1972, and was completed in September, 1973.
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 nearest the lake.
In this report, nutrient loads for sampled tributaries were deter-
mined by using a modification of a U.S. Geological Survey computer
program for calculating stream loadings*. Nutrient loadings for
unsampled “minor tributaries and immediate drainage” (“ZZ” of U.S.G.S.)
were estimated by using the means of the nutrient loads, in lbs/mi 2 /year,
at station B-l and multiplying the means by the ZZ area in mi 2 .
The Village of Cecil wastewater is treated in seepage ponds; and
reportedly, there is no discharge to Shawano Lake (Schraufnagel, 1972).
* See Working Paper No. 1.
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12
A. Waste Sources:
1. Known municipal -
Pop. Mean Receiving
Name Served Treatment Flow (mgd) Water
Cecil 369* Seepage 0.036* ?
ponds
2. Industrial - None known.
* Estimated (1970 census; flow at 100 gallons/capita/day).
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13
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
lbs P/ % of
Source yr total
a. Tributaries (non-point load) -
Loon Lake outlet 540 13.5
Pickerel Creek 1,060 26.6
b. Minor tributaries & immediate
drainage (non-point load) - 1,180 29.6
c. Known municipal SIP’s -
Cecil ? -
d. Septic tanks* — 250 6.2
e. Industrial -
None known -
f. Direct precipitation** - 960 24.1
Total 3,990 100.0
2. Outputs -
Shawano Lake Outlet 3,060
3. Net annual P accumulation - 930 pounds.
* Estimated 400 dwellings on lakeshore; see Working Paper No. 1.
** Estimated; see Working Paper No. 1.
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14
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
lbsN/ %of
Source yr yr) total
a. Tributaries (non—point load) -
Loon Lake outlet 24,560 14.0
Pickerel Creek 29,200 16.6
b. Minor tributaries & immediate
drainage (non-point load) - 53,330 30.3
c. Known municipal SIP’s -
Cecil ?
d. Septic tanks* - 9,400 5.4
e. Industrial -
None known - -
f. Direct precipitation** - 59,310 33.7
Total 175,800 100.0
2. Outputs —
Shawano Lake Outlet 129,900
3. Net annual N accumulation - 45,900 pounds.
* Estimated 400 dwellings on lakeshore; see Working Paper No. 1.
** Estimated; see Working Paper No. 1.
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15
D. Mean Annual Non-point Nutrient Export by Subdrainage Area:
Tributary lbs P/rni 2 /yr lbs N/mi 2 /yr
Loon Lake outlet 36 1,626
Pickerel Creek 61 1,678
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-
phornetry permitted. A mesotrophic rate would be considered one
between “dangerous” and “permissible”.
Total Phosphorus Total Nitrogen
Units Total Accumulated Total Accumulated
lbs/acr /yr 0.6 0.2 29.0 7.5
grams/rn /yr 0.07 0.02 3.2 0.8
Vo1le weider loading rates for phosphorus
(g/m /yr) based on mean depth and mean
hydraulic retention time of Shawano Lake:
“Dangerous” (eutrophic rate) 0.28
“Permissible” (oligotrophic rate) 0.14
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16
VI. LITERATURE REVIEWED
Andrews, Lloyd M., and C. W. Threinen, 1968. Surface water resources
of Shawano County. Dept. of Natural Resources, Madison.
Anonymous, 1972. Wisconsin lakes. Pubi. 218-72, Dept. of Natural
Resources, Madison.
Ketelle, Martha J., and Paul D. Uttormark, 1971. Problem lakes in
the United States. EPA Water Poll. Contr. Res. Series, Project
16010 EHR.
Lueschow, Lloyd A., 1972. Biology and control of selected aquatic
nuisances in recreational waters. Tech. Bull. #57, Dept. of
Natural Resources, Madison.
McKersie, Jerome R.,, Robert M. Krill, James L. Lissack, and Ronald K.
Krueger, 1971. Wolf River pollution investigation survey. Dept.
of Natural Resources, Madison.
Schraufnagel, Francis H., 1972. Personal communication (Village of
Cecil waste treatment facilities). Dept. of Natural Resources,
Madison.
____________ 1974. Personal communication (status of Shawano Lake
Sanitary District). Dept. of Natural Resources, Madison.
Vollenweider, Richard A., (in press). Input-output models. Schweiz
A. Hydrol
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17
VII. APPENDICES
APPENDIX A
TRIBUTARY FLOW DATA
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TRIBUTARY FLOW INFORMATION FOR WISCONSIN 9/30/74
LAKE CODE 5539 SIIAWANO LAKE
TOTAL DRAINAGE AREA OF LAKE 74.90
SUB—DRAINAGE NORMALIZED FLOWS
TRIBUTARY AREA JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC MEAN
5539A 1 74.90 23.93 31.94 68.75 149.48 88.74 85.53 48.88 32.85 43.81 46.85 52.84 30.93 58.67
553981 15.10 8.50 6.90 14.00 26.00 17.00 23.00 12.00 7.30 9.80 13.00 14.00 10.00 13.46
5 539C 1 17.40 4.00 7.90 19.00 33.00 15.00 15.00 7.80 5.90 7.50 7.60 10.00 4.40 11.40
5 539ZZ 42.40 13.00 18.00 39.00 86.00 50.00 56.00 28.00 19.00 25.00 27.00 30.00 18.00 34.05
SUMMARY
TOTAL DRAINAGE AREA OF LAKE — 74.90 TOTAL FLOW IN = 707.60
SUM OF SUB—DRAINAGE AREAS — 74.90 TOTAL FLOW OUT = 704.53
MEAN MONTHLY FLOWS AND DAILY FLOWS
TRIBUTARY MONTH YEAR MEAN FLOW DAY FLOW DAY FLOW DAY FLOW
553961 9 72 56.00 24 43.00
10 72 86.00 14 50.00
11 72 75.00
12 72 47.00 16 42.00
1 73 31.00
73 25.00 3 29.00
3 73 640.00 3 23.00
4 73 240.00 1 180.00 21 320.00
5 73 310.00 6 300.00 26 270.00
6 73 62.00 3 96.00
7 73 11.00 28 11.00
8 73 5.00
553981 9 72 12.00 24 8.80
10 72 18.00 14 10.00
11 72 15.00
12 72 9.40 16 8.00
1 73 3.70
2 73 2.90 3 3.30
3 73 300.00 3 2.70
4 73 61.00 7 56.00 21 83.00
5 73 79.00 6 76.00 21 46.00
6 73 7.80 3 12.00
7 73 0.70 28 0.70
8 73 0.20
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TRIBUTARY FLOW INFORMATION FOR WISCONSIN 9/30/74
LAKE CODE 5539 SHAWANO LAKE
MEAN MONTHLY FLOWS AND DAILY FLOWS
TRIBUTARY MONTH YEAR MEAN FLOW DAY FLOW DAY FLOW DAY FLOW
5539C1 9 72 2.20 24 1.70
10 72 3.50 14 2.00
11 72 2.90
12 72 2.20 16 1.90
1 73 4.40
2 73 3.50 3 4.00
3 73 320.00 3 3.40
4 73 69.00 7 62.00 21 93.00
5 73 88.00 6 86.00 21 52.00
6 73 9.20 3 14.00
7 73 0.90 28 0.90
8 73 0.20
5539ZZ 9 72 33.09 24 25.00
10 72 49.00 14 29.00
11 72 43.00
12 72 27.00 16 23.00
1 73 15.00
2 73 12.00 3 14.00
3 73 490.00 3 11.00
4 73 140.00 1 110.00 7 130.00 21 200.00
5 73 190.00 6 180.00 21 110.00 26 170.00
6 73 30.00 3 47.00
73 4.20 28 4.20
8 73 1.70
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APPENDIX B
PHYSICAL and CHEMICAL DATA
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STORET RETRIEVAL DATE 74/09/30
553901
44 48 48.0 088 28 36.0
SMAWANO LAKE
55 WISCONSIN
1 IEPALES 2111202
3 0026 FEET DEPTH
00010 00300 00077 00094 00400 00410 00630 00610 00665 00666
DATE TIME DEPTH WATER O TRANSP CNOUCTVY PH T ALK N02&N03 NH3—N PHOS-TOT PHOS—DIS
FROM OF TEMP SECCHI FIELD CACO3 N—TOTAL TOTAL
TO DAY FEET CENT MG/L INCHES MICROMHO SU MG/I MG/L MG/I MG/I P MG/L P
7?/06/22 05 50 0000 19.2 6.8 96 200 8.20 103 0.050 0.110 0.025 0.012
05 50 0015 19.3 6.3 200 8.30 100 0.050 0.120 0.021 0.008
- OS 50 0025 18.5 4.9 205 7.70 101 0.050 0.190 0.020 0.006
72/08/24 ii 00 0000 68 223 8.30 106 0.060 0.060 0.028 0.018
11 00 0004 20.8 7.8 223 8.30 104 0.060 0.060 0.032 0.008
11 00 0015 20.5 223 8.35 102 0.060 0.070 0.021 0.008
11 00 0020 20.4 6.6 200 8.10 103 0.060 0.070 0.031 0.007
72/11/08 11 00 0000 72 240 7.70 107 0.040 0.060 0.012 0.006
11 00 0004 5.8 11.4 230 7.70 108 0.040 0.070 0.017 0.008
11 00 0015 5.8 11.3 230 7.70 107 0.040 0.060 0.016 0.009
11 00 0024 5.8 11.7 235 7.70 104 0.040 0.050 0.019 0.007
32217
DATE TIME DEPTH CHLRPHYL
FROM OF A
TO DAY FEET IJG/L
77/06/22 05 50 0000 10.SJ
72/08/24 11 00 0000 9. OJ
72/11/08 11 00 0000 10. OJ
J VALUE KNOWN TO BE IN ERROR
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STORET RETRIEVAL DATE 74/09/30
553902
44 48 42.0 088 31 00.0
SHAWANO LAKE
55 WISCONSIN
1 IEPALES 2111202
3 0012 FEET DEPTH
00010 00300 00077 00094 00400 00410 00630 00610 00665 00666
DATE TIME DEPTH WATER DO TRANSP CNDUCTVY PH T ALK N02&N03 NH3—N PHOS—TOT PHOS—DIS
FROM OF TEMP SECCHI FIELD CACO3 N—TOTAL TOTAL
TO DAY FEET CENT MG/L INCHES NICRONHO SL) MG/I MG/I HG/L MG/I P MG/I P
72/06/22 06 15 0000 18.9 7.2 84 205 8.20 191 0.050 0.100 0.025 0.012
- 06 15 0010 18.9 9.0 200 8.20 101 0.050 0.100 0.025 0.008
72/08/24 09 35 0000 64 223 8.25 102 0.070 0.090 0.024 0.009
09 35 0004 20.3 222 8.25 110 0.070 0.070 0.022 0.009
09 35 0010 20.3 7.2 222 8.20 109 0.080 0.080 0.020 0.008
- 09 35 0015 20.2 7.3 225 8.25 109 0.070 0.070 0.018 0.007
72/U/OR 10 40 0000 86 230 7.80 101 0.050 0.050 0.013 0.009
10 40 0004 5.6 10.6 230 7.80 103 0.040 0.050 0.017 0.009
10 40 0016 5.6 11.0 235 7.80 103 0.040 0.050 0.017 0.008
32217
DATE TIME DEPTH CHLRPHYL
FROM OF A
TO DAY FEET UG/L
72/06/22 06 15 0000 35.7J
72/08/24 09 35 0000 7.7J
72/11/08 10 40 0000 9.7J
J VALUE KNOWN TO BE IN ERROR
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STORET RETRIEVAL DATE 74/09/30
553903
44 47 48.0 088 33 30.0
SHAWANO LAKE
55 WISCONSIN
11EPALES 2111202
3 0006 FEET DEPTH
00010 00300 00077 00094 00400 00410 00630 00610 00665 00666
DATE TIME DEPTH WATER DO TRANSP CNOUCTVY PH T ALK NO2 .NO3 NH3-N PHOS-TOT PHOS—DIS
FROM OF TEMP SECCHI FIELD CACO3 N—TOTAL TOTAL
TO DAY FEET CENT MG/L INCHES MICROMHO SU MG/L MG/L HG/I MG/L P MG/I P
72/06/22 06 30 0000 18.0 7.0 90 210 8.20 103 0.050 0.090 0.024 0.010
06 30 0004 18.0 6.4 210 8.10 104 0.050 0.080 0.026 0.013
72/08/24 09 20 0000 220 8.35 109 0.070 0.070 0.020 0.008
-- 09 20 0004 19.6 220 8.40 108 0.060 0.060 0.021 0.008
72/11/08 10 25 0000 84 235 7.70 103 0.050 0.060 0.014 0.006
10 25 0004 5.6 10.5 235 7.70 104 0.040 0.050 0.014 0.007
32217
DATE TIME DEPTH CHLRPHYL
FROM OF A
TO DAY FEET UG/L
72/06/22 06 30 0000 7.7J
77/08 24 09 20 0000 6.6J
72/11/08 10 25 0000 10.OJ
J VALUE KNOWN TO BE IN ERROR
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APPENDIX C
TRIBUTARY DATA
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STORET ETR1EvAL DATE 74/10/02
5539A1 LSS S39A1
44 47 30.0 088 34 00.0
SHAWANO LAKE OUTLET
55 15 S’-4AWANO
0/SHAWANO LAKE
Co HWY HH’-I BRDG 1 MI NE OF SHAWANO
11EPALES 2111204
4 0000 FEET DEPTH
00630 00625 00610 00671 00665
DATE TIME DEPTH NO2F NO3 TOT KJEL NH3—N PHOS—DIS PP-lOS—TOT
FROM OF N—TOTAL N TOTAL ORTHO
TO DAY FEET MG/L MG/L M(’/L MG/L P MG/L P
7?/09/24 14 40 0.390 1.050 0.147 0.00 5K 0.030
72/10/14 10 05 0.084 0.600 0.115 0.005K 0.021
7?/11/11 14 30 0.018 0.560 0.018 0.005K 0.019
7?/12/17 09 50 0.028 0.600 0.046 0.005K 0.016
73/01/06 11 40 0.044 0.840 0.060 0.005K 0.025
73/02/03 11 25 0.050 2.200 0.126 0.005K 0.015
71/Q3/03 11 35 0.370 1.760 0.072 0.013 0.030
73/04/01 10 30 0.015 0.920 0.048 0.007 0.040
71/04/21 14 30 0.024 1.600 0.052 0.005K 0.035
71/05/06 08 50 0.016 0.720 0.035 0.012 0.025
73/05/26 14 00 0.014 0.570 0.015 0.013 0.020
73/06/03 10 15 0.018 0.705 0.022 0.005K 0.020
73/07/28 09 40 0.042 1.050 0.066 0.005K 0.035
73/09/01 09 30 0.010K 0.A40 0.018 0.008 0.040
K VALUE KNOWN TO BE LESS
THLN 1 DIC4TF.U
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STORET RETRIEVAL DATE 74/10/02
553981 LS553981
44 50 00.0 0R 30 00.0
LOON LAKE OUTLET
55 15 SHAWANO
T/SHAWANO LAKE
Co HWY E X!NG E SIDE OF LOON LAKE
11EPALES 2111204
4 0000 FEET DEPTH
00630 00625 00610 00671 00665
DATE TIME DEPTH NO2 NO3 TOT KJEL NH3—N PHOS—DIS PHOS—TOT
FROM OF N—TOTAL N TOTAL ORTHO
TO DAY FEET MG/L MG/L MG/L MG/L P MG/L P
7?/0 /24 14 25 0.375 0.650 0.154 0.005K 0.014
72/10/14 09 55 0.061 1.250 0.102 0.005K 0.020
7?/)l/11 14 45 0.046 0.600 0.027 0.006 0.025
72/12/16 14 15 0.069 0.680 0.076 0.007 0.022
73/01/06 11 25 0.0 M 0.630 0.069 0,005K 0.020
73/0?/03 II 10 0.140 O.R 0 0.120 0.005K 0.015
73/03/03 11 20 0.210 0.520 0.038 0.010 0.015
73/04/07 09 50 0.100 0.560 0.017 0.005K 0.015
73/04/21 14 20 0.074 1.000 0.042 0.005K 0.020
73/05/06 08 25 0.230 1.000 0.032 0.015 0.035
73/05/21 13 50 0.039 0.730 0.030 0.008 0.020
73/06/03 11 10 0.042 0.730 0.030 0.005K 0.020
73/07/?8 10 15 0.015 1.200 0.029 0.005K 0.020
73/09/01 09 50 0.010K 0.520 0.032 0.006 0.020
K VALUE
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STORET RETRIEVAL DATE 74/10/02
5539C1 LS5539C1
44 48 30.0 088 27 07.0
PICKEREL CREEK
55 15 GILLETT
T/SHAWANO LAKE
ST HWY 117 BRDG IN CECIL
1 IEPALES 2111204
4 0000 FEET DEPTH
00630 00625 00610 00671 00665
DATE TIME DEPTH NO2 NO3 TOT P(JEL N93-N PHOS—DIS PHOS—TOT
FROM OF N—TOTAL TOTAL ORTHO
TO DAY FEET MG/L hiG/L MG/I MG/L P MG/L P
7?/09/24 14 10 0.470 3.000 0.147 0.028 0.035
72/10/14 09 45 0.096 1.200 0.130 0.009 0.031
7?/11/11 15 iS 0.034 1.100 0.017 0.010 0.024
7?/1?/16 13 45 0.040 1.400 0.102 0.028 0.093
73/01/06 11 10 0.058 1.200 0.140 0.01? 0.065
73/02/03 10 45 0.087 1.100 0.096 0.012 0.060
73/03/03 11 00 0.460 1.800 0.390 0.013 0.085
73/04/07 09 30 0.022 1.380 0.027 0.005K 0.025
73/04/21 14 00 0.015 0.980 0.038 0.010 0.040
73/05/06 08 00 0.069 1.000 0.046 0.011 0.025
73/05/21 13 30 0.010K 1.260 0.021 0.011 0.030
73/06/03 10 30 0.011 0.950 0.021 0.015 0.040
73/07/28 10 00 0.033 1.260 0.080 0.040 0.070
73/09/01 10 45 0.014 0.920 0.037 0.040 0.075
K VALUE (NOWN TO 3F LESS
THAN INDICATFr)
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