-------
REPORT
ON
WILLOW RESERVOIR
ONEIDA COWIY
WISCONSIN
EPA REGION V
WORKING PAPER No, 56
WITH THE COOPERATION OF THE
WISCONSIN DEPARTMENT OF NATURAL RESOURCES
AND THE
WISCONSIN NATIONAL GUARD
OCTOBER, 1974
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1
CONTENTS
ge
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 Suniriary 5
V. Nutrient Loadings 11
VI. Literature Reviewed 16
VII. Appendices 17
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11
FOREWORD
The National Eutrophication Survey was initiated in 1972 in
response to an Administration con mitment 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.
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
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 Col umbi a
Wissota Chippewa
Yellow Burnett
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WILLOW RESERVOIR
Lake Sampling Site
Tributary Sampling Site
0
Wisconsin
Flap Locati
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WILLOW RESERVOIR
STORET NO. 5574
I. CONCLUSIONS
A. Trophic Condition:
As far as is known, there are no records of occurrence of
aquatic nuisances in Willow Reservoir. Survey data indicate
the Reservoir is probably eutrophic, but personnel of the
Wisconsin Department of Natural Resources consider the Reser-
voir to be mesotrophic.
B. Rate-Limiting Nutrient:
Algal assay results are not considered reliable. Lake data
indicate nitrogen limitation at all sampling times.
C. Nutrient Controllability:
During the sampling year, Willow Reservoir received a phos-
phorus load at a rate less than that proposed by Vollenweider
(in press) as “dangerous 1 ’ but more than the “permissible” rate;
i.e., a mesotrophic rate (see page 15). However, almost all
of the phosphorus load is attributable to non-point, and hence
uncontrollable, sources.
Apparently, the Minoqua Sanitary District discharge, some
45+ stream miles away, had little effect on Willow Reservoir
during the sampling year. Note that the phosphorus load of the
Tomahawk River per square mile was essentially the same as that
of the unimpacted Willow River (see page 15).
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2
It is concluded that point—source control would have little
effect on the trophic condition of Willow Reservoir.
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3
II. INTRODUCTION
Willow Reservoir was formed by the impoundment of the Tomahawk River
in 1927 by the Wisconsin Valley Improvement Company for storage and low
flow augmentation. It is located in the headwaters portion of the upper
Wisconsin River drainage basin in glaciated north central Wisconsin. Most
of the area is wooded, and recreation is said to be the base of the
economy.
Recreational uses of Willow Reservoir include swimming, boating, and
fishing. Game fish present are muskellunge, northern pike, walleyes,
largernouth bass, and panfish. Six resorts and eight boat liveries offer
services.
Although most of the shoreline is privately owned, public access is
provided.
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4
III. LAKE AND DRAINAGE BASIN CHARACTERISTICS
A. Lake Morphometry:
1. Surface area: 5,134 acres.
2. Mean depth: 15 feet.
3. Maximum depth: 22 feet.
4. Volume: 77,000 acre/feet.
5. Mean hydraulic retention time: 119 days.
B. Tributary and Outlet:
(See Appendix A for flow data)
1. Tributaries -
Name Drainage area* Mean flow*
Tomahawk River 190.0 mi 2 185.2 cfs
Willow River 70.3 mi 2 72.0 cfs
Minor tributaries & 2
imediate drainage - 58.7 mi 67.9 cfs
Totals 319.0 mi 2 325.1 cfs
2. Outlet -
Tomahawk River 327.0 mi 2 ** 325.1 cfs**
C. Precipitation :
1. Year of sampling: 43.3 inches.
2. Mean annual: 31.3 inches.
* Drainage areas are accurate within ±0.5%; mean daily flows are accurate
within ±40%; mean monthly flows are accurate within ±35%; and normalized
monthly flows are accurate within ±35%.
** Includes are of lake; outflow adjusted to equal sum of inflows.
1- See Working Paper No. 1, “Survey Methods”.
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5
IV. LAKE WATER QUALITY SUMMARY
Willow Reservoir was sampled three times during the open-water season
of 1972 by means of a pontoon-equipped Huey helicopter. Each time, sam-
ples 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 or near bottom to
surface) sample was composited from the two 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 of the stations
for chlorophyll a analysis. The maximum depths sampled were 11 feet at
station 1 and 15 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
Parameter Minimum Mean Median Maximum
Temperature (Cent.) 3.4 3.5 3.5 3.6
Dissolved oxygen (mg/i) 10.8 11.0 10.8 11.6
Conductivity (pmhos) 70 75 72 80
pH (units) 6.7 6.7 6.8 6.8
Aika linity.(nig/l) 28 30 30 33
Total P (mg/i) 0.023 0.027 0.030 0.032
Dissolved P (mg/i) 0.014 0.018 0.020 0.021
NO + NO (mg/i) 0.080 0.108 0.120 0.140
Am onia ?mg/i) 0.080 0.092 0.090 0.110
ALL VALUES
Secchi disc (inches) 36 42 40 54
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7
B. Biological characteristics:
1. Phytoplankton -
Sampling Dominant Number
Date Genera per ml
06/25/72 1 . Melosira 3,765
2. Dinobryon 1,175
3. Tabellaria 723
4. Polycystis 663
5. Fragilaria 512
Other genera 1 ,626
Total 8 464
08/23/72 1 . Melosira 1,302
2. Anabaena 597
3. Cyclotella 470
4. Fragilaria 380
5. Asterionella 235
Other genera 615
Total 3,599
11/04/72 1. Flagellates 2,108
2. Dinobryon 331
3. Navicula 120
4. Melosira 90
5. Achnanthes 75
Other genera 469
Total 3,193
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8
Station Chlorophyll a
Number (jig/•jJ________
01 12.9
02 15.6
01 13.4
02 5.8
01 4.1
02 3.2
Maximum yield
________ ________ ( mg/i-dry wtj
0.1
1.3
3.0
3.0
5.0
31 .6
0.1
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
Date ________ ____ ________
06/25/72
08/23/72
11/04/72
C. Limiting Nutrient Study:
1 . Autoclaved, filtered, and nutrient spiked -
Ortho P Inorganic N
Spike (mg/l) Conc. (mg/l) Conc. (mall ) _____________
Control 0.002 0.094
0.006 p 0.008 0.094
0.012 p 0.014 0.094
0.024 p 0.026 0.094
0.060 p 0.062 0.094
0.060 P + 10.0 N 0.062 10.094
10.0 N 0.002 10.094
2. Discussion -
The assay results are not considered reliable because of
the significant loss of both phosphorus and nitrogen between
the time the sample was collected and the time the assay was
begun. One half of the phosphorus originally present was
lost, and inorganic nitrogen was reduced from 200 pg/i to
94 pg/i
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9
On the basis of other assays, had the nutrient loss not
occurred, the probable control yield would have been a moder-
ately high 7 mg/l dry weight.
0. Trophic Condition:
As far as is known, there are no records of the occurrence of
aquatic nuisance conditions in Willow Reservoir. Survey limnolo-
gists did not observe excessive algal growths at any time; but of
the 46 Wisconsin lakes studied, 21 had less mean chlorophyll a,
and blue-green alga were present in two of the three phytoplankton
samples collected.
Nutrient concentrations in the reservoir were comparatively
low; 31 of the 46 Wisconsin lakes had higher mean total phosphorus,
32 had higher mean dissolved phosphorus, and only six had lower
mean inorganic nitrogen. The nutrient concentrations observed are
believed to be due to moderate loadings and the relatively short
detention time of about four months.
Twenty-two of the Wisconsin lakes had greater Secchi disc
transparencies. Although turbidity and/or color may have in-
fluenced this, it is again noted that 21 of the lakes studied
had less chlorophyll a.
Although lake sampling was not intensive, some depression of
dissolved oxygen with depth occurred consistently at station 2
in the main body of the reservoir.
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10
On the basis of Survey data, it is concluded that the
reservoir is in a borderline eutrophic condition; however,
Department of Natural Resources personnel consider the reser-
voir to be mesotrophic (Schraufnaugel, 1974).
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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 of the tribu-
tary sites indicated on the 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.
Through an interagency agreement, stream flow estimates for the year
of sampling and a “normalized” or average year were provided by the Wis-
consin District Office of the U.S. Geological Survey for the tributary
sites nearest the lake.
In this report, tributary nutrient loads were determined by using a
modification of a U.S. Geological Survey computer program for calcu-
lating stream loadings*. Nutrient loadings for “minor tributaries and
immediate drainage” (“ZZ” of U.S.G.S.) were estimated by using the nu-
trient loads of the Willow River, in lbs/mi 2 /year, and multiplying by
the ZZ area in mi 2 .
The Minoqua Sanitary District waste treatment facility discharges to
the Tomahawk River about 45 miles upstream from Willow Reservoir and,
hence, was outside the 25-mile limit of the Survey. This source appears
to have little effect on Willow Reservoir (see discussion, page 1).
* 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
Minoqua SD 1,280* Act. sludge O.l28** Tomahawk River
2. Industrial - None known
* Estimated on basis of flow (100 gal/capita/day).
** McKersie, et al., 1970.
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13
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
lbsP/ %of
Source yr total
a. Tributaries (non-point load) -
Tomahawk River 11,960 56.3
Willow River 4,640 21.8
b. Minor tributaries & immediate
drainage (non-point load) - 3,870 18.1
c. Known municipal STP’s -
Minoqua SD -
d. Septic tanks* — 50 0.2
e. Industrial - None known
f. Direct precipitation** - 800 3.7
Total 21 ,230 100.0
2. Outputs -
Lake outlet - Tomahawk River 19,220
3. Net annual P accumulation - 2,210 pounds
* Six resorts and 25 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 total
a. Tributaries (non-point load) -
Tomahawk River 223,420 48.2
Willow River 102,650 22.2
b. Minor tributaries & immediate
drainage (non-point load) - 85,700 18.5
c. Known municipal STP’s -
Minoqua SD ? -
d. Septic tanks* - 2,000 0.4
e. Industrial - None known - -
f. Direct precipitation** - 49,460 10.7
Total 463,230 100.0
2. Outputs -
Lake outlet - Tomahawk River 515,010
3. Net annual N loss - 51 ,780 pounds
* Six resorts and 25 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 Sub-drainage Area:
Tributary lbs P/mi 2 /yr lbs N/mi 2 /yr
Tomahawk River 63 1,176
Willow River 66 1,460
E. Yearly Loading Rates:
In the following table, the existing phosphorus loading
rates are compared to those porposed 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 4.2 0.4 90.2 loss*
grams/m /yr 0.47 0.05 10.1 -
Volle weider loading rates for phosphorus
(g/m /yr) based on mean depth and mean
hydraulic retention time of Willow Reservoir:
“Dangerous” (eutrophic rate) 0.72
“Permissible” (oligotrophic rate) 0.36
* There was an apparent loss of nitrogen during the sampling year. This may
have been due to solubilization of previously sedimented nitrogen, recharge
with nitrogen-rich ground water, or (probably) underestimation of minor
tributary and immediate drainage contributions. Whatever the cause, a
similar loss of nitrogen has been observed at Shagawa Lake, Minnesota, which
has been intensively studied by EPA’s National Eutrophication and Lake
Restoration Branch.
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16
VI. LITERATURE REVIEWED
Andrews, Lloyd M., and C. W. Threinen, 1966. Surface water resources
of Oneida County. Conservation Dept., Madison.
Anonymous, 1972. Wisconsin lakes. Pubi. 218-72, Dept. of Natural
Resources, Madison.
Ball, Joseph, 1974. Personal communication (volume of Willow Reser-
voir and shoreline development). Dept. of Natural Resources,
Madison.
Gall, Robert W., 1973. Personal comunication (characteristics of
Willow Reservoir and drainage). Wisconsin Valley Improvement
Company, Wausau.
Martin, R. 0. R., and Ronald L. Hanson, 1966. Reservoirs in the
United States. Geol. Surv. Water-Supply Paper #1838.
McKersie, Jerome R., Robert M. Krill, William H. Doyle, and Larry
L. Maitbey, 1970. Upper Wisconsin River pollution investigation
survey. Dept. of Natural Resources, Madison.
Schraufnagel, Francis H., 1974. Personal communication (discussion
of trophic condition of Willow Reservoir). 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
LAP(E CODE 5574 WILLOW RESERVOIR
TOTAL DRAINAGE AREA OF LAKE 327.00
SUB—DRAINAGE NORMALIZED FLOWS
TRIBUTARY AREA JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC MEAN
557441 327.00 206.35 206.35 353.74 648.43 412.80 373.40 255.38 255.38 314.44 314.44 314.44 245.66 325.08
5574A2 190.00 91.00 91.00 210.00 480.00 280.00 220.00 130.00 130.00 160.00 160.00 160.00 110.00 185.18
557481 70.30 20.00 20.00 80.00 280.00 140.00 86.00 34.00 34.00 50.00 48.00 48.00 24.00 71.95
5574ZZ 66.70 18.00 18.00 74.00 270.00 130.00 81.00 32.00 32.00 48.00 45.00 45.00 23.00 67.94
SUMMARY
TOTAL DRAINAGE AREA OF LAKE = 327.00 TOTAL FLOW IN = 3902.00
SUM OF SUB—O AINAGE AREAS = 327.00 TOTAL FLOW OUT = 3900.81
MEAN MONTHLY FLOWS AND DAILY FLOWS
TPIB JTARY MONTH YEAR MEAN FLOW DAY FLOW DAY FLOW DAY FLOW
9 72 290.00 24 205.00
10 72 290.00
ii 72 600.00
12 72 720.00 9 750.00
1 73 S60.00
2 73 460.00 10 460.00
3 73 130.00 10 110.00
4 73 140.00 7 64.00 24 306.00
5 73 900.00 6 1250.00 29 919.00
6 73 420.00 23 345.00
7 73 530.00 28 639.00
8 73 360.00 27 242.00
557442 9 72 150.00 24 1)0.00
10 72 250.00
11 72 250.00
12 72 140.00 9 160.00
I 73 210.00
2 73 140.00 10 150.00
3 73 800.00 10 570.00
4 73 430.00 7 290.00 24 330.00
5 73 640.00 6 730.00 29 480.00
6 73 180.00 23 140.00
7 73 110.00 28 120.00
8 73 130.00 27 100.00
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TRIBUTARY FLOW INFORMATION FOR WISCONSIN
9/30/74
LAKE CODE 5574
WILLOW RESERVOIR
MEAN MONTHLY FLOWS AND DAILY FLOWS
TRIBUTARY MONTH YEAR MEAN FLOW DAY FLOW DAY FLOW DAY
FLOW
557 4t31
9
72
48.00
24
36.00
10
72
140.00
11
72
160.00
12
72
24.00
9
27.00
1
73
39.00
2
73
18.00
10
20.00
3
73
290.00
10
170.00
4
73
240.00
7
160.00
5
73
310.00
6
360.00
6
73
70.00
23
52.00
7
73
27.00
28
32.00
8
73
31.00
27
27.00
5574ZZ
9
10
11
12
1
2
3
4
5
7
8
72
72
72
72
73
73
73
73
73
73
73
73
46.00
130.00
160.00
22.00
36.00
16.00
?90.00
240.00
300.00
66.00
26.00
29.00
24
9
10
10
7
6
23
28
27
34.00
24.00
18.00
160.00
160.00
340.00
50.00
30.00
26.00
24
29
24
29
180.00
180.00
180.00
170.00
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APPENDIX B
PHYSICAL and CHEMICAL DATA
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STORET RETRIEVAL DATE 74/09/30
557401
45 44 54.0 089 53 12.0
WILLOW RESERVOIR
55 WISCONSIN
L1EPALES 2111202
3 0013 FEET DEPTH
00010 00300 00077 00094 00400 00410 00630 00610 00665 00666
DATE TINE DEPTH WATER DO TRANSP CNDUCTVY PH T ALI( 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/L MG/L MG/L MG/L P MG/L P
72/06/25 16 55 0000 18.2 9.5 48 70 7.50 27 0.050 0.050 0.026 0.019
- 16 55 0010 18.0 8.2 70 7.50 26 0.040 0.040 0.027 0.018
72/08/23 15 45 0000 36 79 6.50 28 0.050 0.100 0.049 0.025
15 45 0004 21.3 5.0 78 6.50 29 0.080 0.120 0.050 0.027
15 45 0008 20.8 5.1 79 6.50 28 0.050 0.090 0.054 0.033
72/11/04 16 55 0000 40 80 6.70 32 0.090 0.090 0.023 0.015
16 55 0004 3.4 10.8 80 6.70 33 0.080 0.080 0.024 0.016
16 55 0011 3.4 10.9 78 6.70 32 0.090 0.080 0.025 0.014
32217
DATE TIME DEPTH CHLRPHYL
FROM OF A
TO DAY FEET UG/L
72/06/25 16 55 0000 12.9J
72/08/23 15 45 0000 13.4J
7?/11/04 16 55 0000 4. IJ
J* VALUE KNOWN TO BE IN ERROR
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STORET RETRIEVAL DATE 74/09/30
557402
45 42 48.0 089 52 00.0
WILLOW RESERVOIR
55 WISCONSIN
1 IEPALES
3
2111202
0017 FEET DEPTH
DATE
FROM
TO
7?/ 06/25
72/08/23
72/11/04
TIME DEPTH
DAY FEET
18 05 0000
15 20 0000
15 35 0000
32217
CHLRPHYL
A
UG/L
15.6J
5.8J
3.2J
DATE
FROM
TO
TIME DEPTH
OF
DAY FEET
7?/06/25 18 05 0000
- 18 05 0015
72/08/23 15 20 0000
15 20 0004
15 20 0014
7 ?/1I/04 15 35 0000
15 35 0004
15 35 0015
00010
00300
00077
00094
00400
00410
00630
00610
00665
00666
WATER
DO
TRANSP
CNDUCTVY
PH
T
ALK
NO2 NO3
t*13—N
PHOS-TOT
PHOS—DIS
TEMP
SECCHI
FIELD
CACO3
N—TOTAL
TOTAL
CENT
MG/L
INCHES
MICROMHO
SU
MG/L
MG/I
MG/L
MG/L P
MG#’L P
19.0
17.2
21.2
20.8
3.6
3.6
9.7
8.0
6.7
5.9
11.6
10.R
54
38
36
50K
50K
70
70
70
72
70
72
7.70
7.50
6.90
6.95
6.90
6.80
6.80
6.80
20 0.040
20 0.040
29 0.050
29 0.050
28 0.060
28 0.120
28 0.130
28 0.140
0.040
0.0 30
0.090
0.070
0.100
0.100
0.090
0.110
0.0 30
0.028
0.0 25
0.026
0.0 35
0.032
0.031
0.030
0.0 22
0.021
0.016
0.0 17
0.017
0.021
0.020
0.021
K V LU NOwN TO - E LESS
Tii F I I D!Cs TE)
J VL LUc KNo qc,I 10 : i : EP O-’
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APPENDIX C
TRIBUTARY DATA
-------
STORET PETRIEVAL DATE 74/10/02
5574A1 LS5574A1
45 43 00.0 059 51 00.0
TOMAKAwI< RIVER
55 MCCORD 15 ’
0/WILLOW ES
Co HVIY RD&
1 1EPALES
4
2111204
0000 FEET DEPTH
00630
00625
00610
00671
00665
DATE
TIME
DEPIN
NO2 N03
TOT KJEL
NH3-N
Pi-IOS—DIS
PHOS—TOT
FROM
OF
r.J—TOTAL
N
TOTAL
ORTHO
TO
DAY
FEET
MG/L
i(;/L
MG/L
MG/L P
MG/L P
7?/09/24
11
00
0.077
1.750
0.083
0.008
0.04?
7?/lI/05
09
30
0.126
0.690
0.044
0.012
0.037
7?/17/09
10
30
0.090
0.930
fl.023
0.015
0.050
73/01/11
11
00
0.101
0.560
0.070
0.009
0.020
73/02/10
10
00
0.138
0.440
0.080
0.019
0.025
73/03/10
11
00
0.180
0.400
0.063
0.015
0.030
73/04/07
10
00
0.075
0.73?
0.014
0.007
0.0?5
73/04/24
13
00
0.010K
0.330
0.013
0.005K
0.025
73/05/06
15
00
0.035
0.420
0.020
0.010
0.020
71/05/?Q
10
00
0.010K
0.350
0.029
0.005K
0.020
71/06/23
15
00
0.021
2.310
0.460
0.100
0.145
73/07/2R
11
00
0.011
0.630
0.016
0.007
0.040
73/ OH/?7
0.010K
0.440
O.O4
0.009
0.020
K V4LUF t i0 N TO r E LESS
TriAN INI)ICATF I
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STORET RETRIEVAL DATE 74/10/02
5574A2 Ls5574A7
£e5 45 30.0 089 50 30.0
TOtIAHAWK RIVER
55 15 LAC DU FLAPIBE
I/WILLOW RESERVOIR
C ) WY 5.5 MI WSW OF HAZELHURST
1 IEPALES 2111204
4 0000 FEET DEPTH
00630 00625 00 1O 00671 00665
r)ATE TIME DEPTH N02h.NO1 TOT KJFL NH3—N PHOS—DIS PHOS—TOT
FROM OF N—TOTAL N TOTAL OPTHO
TO DAY FEET MG/L MG/L Mr,/L MG/L P MG/L P
72/09/24 11 30 0.161 0.500 0.145 0.026 0.050
72/11/05 10 00 0.036 0.390 0.016 0.007 0.025
7?/1?/09 11 00 0.061 0.370 0.010 0.010 0.020
71/01/13 10 00 0.105 0.400 0.054 0.009 0.020
73/02/10 11 00 0.136 0.360 0.042 0.013 0.025
71/03/10 1’ 00 0.160 0.420 0.064 0.014 0.025
71/04/07 11 00 0.063 0.600 0.012 0.011 0.020
71/04/? . 1 00 0.010K 0.400 0.005K 0.005 K 0.025
71/05/06 15 00 0.010K 1.120 0.030 0.00E 0.025
71/05/2 13 00 0.010K 0.RRO 0.024 0.005K 0.020
71/0f /23 1? 00 0.025 0.600 0.105 0.030 0.075
71/O7/2 14 00 0.03? 0.460 0.OOA 0.019 0.050
71/06/27 0.010K fl.S00 0.090 0.015 0.035
K VaLUE NO JN TO ,E LESS
T.9L N I1DIATED
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ST9PET RETRIEVAL DATE 74/10/02
S574r ) LS5574B1
45 42 00.0 089 59 00.0
WILLOW IVE
55 15 MCCORD
T/ ILLOW RESERVOIP
CO HWY 1 10 MI N OF
1 1FPALES
4
TRIPOLI
2111204
0000 FEET DEPTH
00630
00625
00610
00671
00665
DATE
TIME
DE TH
NO2 NO3
TOT KJFL
NH3—N
PHOS—DIS
PHOS—TOT
FROM
OF
N—TOTAL
N
TOTAL
OPTI O
TO
DAY
FEET
MG/L
‘4G/L
MG/L
MG/L P
MG/L P
72/09/24
13
00
0.257
1.100
0.155
0.014
0.075
72/ 11/OS
1.1
00
0.100
0.720
0.026
0.011
0.030
7?/1?/09
13
00
0.088
0.780
0.063
0.014
0.032
71/01/13
1?
00
0.120
0.900
0.132
0.013
0.035
73/02/10
1?
05
0.160
0.5 0
0.09?
0.012
0.025
73/01/10
13
30
0.200
0.630
0.081
0.013
0.025
73/04/07
0.030
0.460
0.011
0.005K
0.150
71/04/24
15
00
0.0?
0.770
0.007
0.005K
0.020
73/05/06
11
00
0.010K
0.500
0.022
0.007
0.020
3/05/?9
15
00
0.014
0.5?0
0.O?9
0.005K
0.025
71/06/23
10
00
0.013
0.690
0.096
0.016
0.035
73/07/28
15
30
0.010K
0.360
0.024
0.025
0.055
71/08/27
0.010K
0.460
0.050
0.009
0.025
K V 3LtJ K O4M TO RE L sS
T’- N I”DIC TEi)
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