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REPORT
ON
LAKE UINONA
DOUGLAS COUNTY
EPA REGION V
WORKING PAPER No, 135
WITH THE COOPERATION OF THE
MINNESOTA POLLLTTION CONTROL AGENCY
AND THE
MINNESOTA NATIONAL GUARD
DECEMBER, 1974
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1
CONTENTS
P a e
Foreword ii
List of Minnesota Study Lakes iv, y
Lak and Drainage Area Map vi
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 4
III. Lake Water Quality Summary 5
IV , Nutrient Loadings 10
V. Literature Reviewed
VI. Appendices 16
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11
FOREWORD
The National Eutrophication Survey was initiated in 1972 in
response to an Administration con iiitment 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 [ 1O6 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 Minnesota Pollution Control
Agency for professional involvement and to the Minnesota National
Guard for conducting the tributary sampling phase of the Survey.
Grant J. Merritt, Director of the Minnesota Pollution Control
Agency, John F. McGuire, Chief, and Joel G. Schilling, Biologist,
of the Section of Surface and Groundwater, Division of Water Quality,
provided invaluable lake documentation and counsel during the course
of the Survey; and the staff of the Section of Municipal Works, Divi—
sion of Water Quality, were most helpful in identifying point sources
and soliciting municipal participation in the Survey.
Major General Chester J. Moeglein, the Adjutant General of
Minnesota, and Project Officer Major Adrian Beltrand, who directed
the volunteer efforts of the Minnesota National Guardsmen, are also
gratefully acknowledged for their assistance to the Survey.
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iv
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF MINNESOTA
LAKE NAME COUNTY
Albert Lea Freeborn
Andrusia Beltrami
Badger Polk
Bartlett Koochiching
Bear Freeborn
Beriiidji Beltrami
Big Stearns
Big Stone Big Stone, MN; Roberts,
Grant, SD
Birch Cass
Bi ackduck Bel trani
Blackhoof Crow Wing
Budd Martin
Buffalo Wright
Calhoun Hennepin
Carlos Douglas
Carrigan Wright
Cass Beltrami, Cass
Clearwater Wright, Stearns
Cokato Wright
Cranberry Crow Wing
Darling Douglas
Elbow St. Louis
Embarass St. Louis
Fall Lake
Forest Washington
Green Kandiyohi
Gull Cass
Heron Jackson
Leech Cass
Le Home Dieu Douglas
Lily Blue Earth
Little Grant
Lost St. Louis
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V
LAKE NAME COUNTY
Madison Blue Earth
Malmedal Pope
Mashkenode St. Louis
McQuade St. Louis
Minnetonka Hennepin
Mirinewaska Pope
Mud Itasca
Nest Kandiyohi
Pelican St. Louis
Pepin Goodhue, Wabasha, MN;
Pierce, Pepin, WI
Rabbit Crow Wing
Sakatah Le Sueur
Shagawa St. Louis
Silver McLeod
Six Mile St. Louis
Spring Washington, Dakota
St. Croix Washington, MN; St. Croix,
Pierce, WI
St. Louis Bay St. Louis, MN; Douglas, WI
Superior Bay St. Louis, MN; Douglas, WI
Swan Itasca
Trace Todd
Trout Itasca
Wagonga Kandiyohi
Wa] imark Chisago
White Bear Washington
Winona Douglas
Wolf Beltrami, Hubbard
Woodcock Kandiyohi
Zumbro Olmstead, Wabasha
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nap Location
450 54
(
:2
2
South
SIP
450 52’—
x
-1
LAKE WINONA
0 Tributary Sampling Site
Lake Sampling Site
Sewaqe Treatment Facility
flirect Drainage Area Limits
9 12 ?Mi.
Scale
950 24
950 22’
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LAKE WINONA
STORE! NO. 27A1
I. CONCLUSIONS
A. Trophic Condition:
Survey data show that Lake Winona is eutrophic. Of the
60 Minnesota lakes sampled in the fall, 39 had less mean total
phosphorus, 18 had less mean dissolved phosphorus, and 33 had
less mean inorganic nitrogen. Of the 80 lakes sampled, 59 had
less mean chlorophyll a_, and 58 had greater Secchi disc trans-
parency.
A Minnesota Pollution Control Agency report notes the October,
1967, occurrence of "very large concentrations of planktonic
algae" in Lake Winona (Bishop and McGuire, 1968).
B. Rate-Limiting Nutrient:
The results of the algal assay show that the lake was
nitrogen limited at the time the sample was collected (May
1, 1973; see page 8).
Lake data indicate nitrogen limitation in July and late
August, 1972 (N/P ratios were 11/1 or less), but a borderline
N/P ratio of 14/1 in October.
C. Nutrient Controllability:
During the sampling year, Lake Winona received a total
phosphorus load at a rate about eight times that proposed by
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2
Vollenweider (in press) as “dangerous”; i.e., a eutrophic rate
(see page 14). Of this load, the Alexandria South plant is
estimated to have contributed about 97% (the Alexandria
Main plant discharges to Upper Lake Winona “downstream” from
Lake Winona).
At present, the Alexandria Lakes Sanitary District, formed
in 1970 (includes the City of Alexandria and the townships of
Alexandria, Carlos, Hudson, and LeGrand), is expanding the South
plant to accomodate all of the sewage of the City of Alexandria
and the District with effluent discharge to Lake Winona. Chemical
phosphorus removal will be provided, and the effluent will be
limited to a mean of 1.0 mg/i P.
On the basis of the flows measured during the sampling year
at the Alexandria Main plant and the South plant (total of 0.924
mgd), and the effluent limit of 1.0 mg/l P, it is calculated that
the expanded South plant will discharge about 2,800 lbs/P/yr to
Lake Winona. This will increase the loading rate from the exist-
ing 1.65 gfm 2 /yr to 1.69 g/m 2 /yr. While the removal of the Main
plant discharge to Upper Lake Winona should reduce nuisance con-
ditions in lakes Agnes and Henry, as well as provide additional
protection for the downstream lakes Le Home Dieu and Carlos, the
resulting increased loading to Lake Winona will doubtless worsen
an already poor trophic condition. Moreover, when the design flow
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3
of the new plant is reached (2.0 mgd; Schilling, 1974), the
loading rate to the lake will be increased to 2.60 g/m 2 /yr or
18 times the eutrophic rate!
If the trophic condition of Lake Winoria is not to be further
degraded, it is concluded that it will be necessary to eliminate
the effluent discharge of the expanded waste treatment plant by
diversion or by land disposal.
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4
II. LAKE AND DRAINAGE BASIN CHARACTERISTICS
A. Lake Morphometryt:
1. Surface area: 192 acres.
2. Mean depth: 44 feet.
3. Maximum depth: 8 feet.
4. Volume: 845 acre/feet.
5. Mean hydraulic retention time: 1.5 yearstt.
B. Tributary and Outlet:
(See Appendix A for flow data)
1. Tributaries -
Name Drainage area* Mean flow*
(None)
Minor tributaries & 2
immediate drainage - 2.6 mi 0.4 cfs
Totals 2.6 mi 2 0.4 cfs
2. Outlet -
Upper Lake Winona inlet 2.9 mi 2 ** 0.4 cfs
C. Precipitation***:
1. Year of sampling: 22.9 inches.
2. Mean annual: 22.6 inches.
t DNR field map (1966); mean depth by random-dot method.
ft Alexandria South plant flow of 0.4 cfs Included in calculation.
* Drainage areas are accurate within ±5%; mean daily flows are accurate
within ±10%; and ungaqed flows ar accurate within ±10 to 25% for
drainage areas greater than 10 mi’.
** Includes area of lake.
See Working Paper No. 1, Survey Methods”.
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5
III. LAKE WATER QUALITY SUMMARY
Lake Winona 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 two or more depths at each station (see map, page
vi). During each visit, a single depth-integrated (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 sin-
gle depth-integrated sample was collected from each of the stations for
chlorophyll a analysis. The maximum depths sampled were 9 feet at station
1 and 6 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 essentially was 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
(10/28/72)
Parameter Minimum Mean Median Maximum
Temperature 4.9 4.9 4.9 4.9
Dissolved oxygen (mg/i) 11.2 11.6 11.6 12.0
Conductivity ( imhos) 380 395 390 420
pH (units) 8.3 8.3 8.3 8.4
Alkalinity (mg/i) 156 159 159 164
Total P (mg/i) 0.103 0.112 0.110 0.126
Dissolved P (mg/i) 0.020 0.020 0.020 0.021
NO + NO (mg/l) 0.100 0.140 0.140 0.180
Am onia mg/1) 0.130 0.145 0.145 0.160
ALL VALUES
Secchi disc (inches)
16 21
21 24
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7
B. Biological characteristics:
1. Phytoplankton —
1. Lyngbya
2. Marssoniella
3. Flagellates
4. Merismopedia
5. Chroococcus
Other genera
Total
1. Lyngbya
2. Microcystis
3. Anabaena
4. Merismopedia
5. Scenedesmus
Other genera
1. Oscillatoria
2. Lyngbya
3. Flagellates
4. Microcystis
5. Synedra
Other genera
54,545
1 0,182
3,818
3,091
182
14,364
86,182
103,571
24,286
10,714
6,428
3,571
10,001
158,571
30,758
21 ,364
9,545
8,485
6,667
18,333
Domi nant
Genera
Number
per ml
Sampling
Date
07/06/72
09/01/72
10/28/72
Total
Total
95,152
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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 ( igfl )
07/06/72 01 20.8
02 14.9
09/01/72 01 71.9
02 77.8
10/28/72 01 88.7
02 77.2
C. Limiting Nutrient Study:
(The algal assay sample collected in October, 1972, was lost in
transit, and Minnesota Pollution Control Agency personnel re-
sampled the lake in early May of 1973. Therefore, the results
given here may not be related directly to Survey lake data,
although the chemical analyses of the raw 1973 sample are quite
similar.)
1. Autoclaved, filtered, and nutrient spiked -
Ortho P Inorganic N Maximum yield
Spike (mg/l) Conc. (mg/l) Conc. (mg/l) ( mg/l—dry wt. )
Control 0.037 0.380 21.6
0.010 P 0.047 0.380 21.1
0.020 P 0.057 0.380 22.5
0.050 P 0.087 0.380 20.3
0.050 P + 5.0 N 0.087 5.380 65.5
0.050 P + 10.0 N 0.087 10.380 60.6
10.0 N 0.037 10.380 51.7
2. Discussion -
The control yield of the assay alga, Selenastrum capri-
cornutum , indicates that the potential primary productivity
of Lake Winona was quite high at the time the sample was
collected (05/01/73). The results also show that the lake
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9
was nitrogen limited. Note the lack of significant change
in yields with increased levels of orthophosphorus until
nitrogen was also added, and that the addition of only
nitrogen resulted in a yield much greater than the control
yield.
During the sampling year, the lake data indicate nitrogen
limitation in July (N/P ratio = 6/1), nitrogen limitation in
September (N/P ratio = 11/1), but a borderline N/P ratio of
14/1 in October (phosphorus could have been limiting).
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10
IV. NUTRIENT LOADINGS
(See Appendix C for all data)
For the determination of nutrient loadings, the Minnesota National
Guard collected monthly near-surface grab samples 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 October, 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
Minnesota District Office of the U.S. Geological Survey for the tribu-
tary sites nearest the lake.
In this report, nutrient loads for sampled tributaries were determined
by using a modification of a U.S. Geological Survey computer program for
calculating stream loadings*. Nutrient loadings for “minor tributaries
and irnniediate drainage” (“ZZ” of U.S.G.S.) were estimated by using the
nutrient loads, in lbs/mi 2 /year, in Krueger’s Slough outlet at station
27B5B-1, and multiplying by the ZZ area in mi 2 .
The operator of the Alexandria South wastewater treatment plant pro-
vided monthly effluent samples and corresponding flow data (the Alexandria
Main plant discharges to Upper Lake Winona).
* See Working Paper No. 1.
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11
A. Waste Sources:
1. Known municipalt -
Pop. Mean Receiving
Name Served Treatment Flow (mgd) Water
Alexandria 1,883* act. sludge 0.260 Swamp to Lake
South Winona
2. Known industrial — None
t Anonymous, 1974.
* Estimated 27% of Alexandria population served by this plant.
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12
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs —
lbsP/ %of
Source yr total
a. Tributaries (non-point load) -
(None)
b. Minor tributaries & immediate
drainage (non-point load) - 30 1.1
c. Known municipal STP’s -
Alexandria South 2,750 97.2
d. Septic tanks* - 20 0.6
e. Known industrial - None - -
f. Direct precipitation** - 30 1.1
Total 2,830 100.0
2. Outputs —
Lake outlet - Upper Lake
Winona inlet 120
3. Net annual P accumulation - 2,710 pounds
* Estimate based on 35 lakeshore dwellings; see Working Paper No. 1.
** See Working Paper No. 1.
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13
C. Annual Total Nitrogen Loading — Average Year
1. Inputs —
lbs N/ % of
Source yr total
a. Tributaries (non-point load) -
(None)
b. Minor tributaries & immediate
drainage (non-point load) - 980 7.8
c. Known municipal SIP’s -
Alexandria South 8,850 70.8
d. Septic tanks* - 820 6.6
e. Known industrial - None - -
f. Direct precipitation** - 1,850 14.8
Total 12,500 100.0
2. Outputs -
Lake outlet — Upper Lake
Winona inlet 1,800
3. Net annual N accumulation — 10,700 pounds
* Estimate based on 35 lakeshore dwellings; see Working Paper No. 1.
** See Working Paper No. 1.
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14
D. 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 oligo-
trophic if morphometry permitted. A mesotrophic rate would
be considered one between “dangerous” and “permissible”.
Total Phosphorus Total Nitrogen
Units Total Accumulated Total Accumulated
lbs/acre/yr 14.7 14.1 65.1 55.7
grams/m 2 /yr 1.65 1.58 7.3 6.2
Volleqweider loading rates for phosphorus
(g/m /yr) based on mean depth and mean
hydraulic retention time of Lake Winona:
“Dangerous” (eutrophic rate) 0.20
“Permissible” (oligotrophic rate) 0.10
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15
V. LITERATURE REVIEWED
Anonymous, 1969. Report on water quality investigation of the
Long Prairie River and lakes Carlos, Le Homme Dieu and Osakis.
MPCA, Minneapolis.
Anonymous, 1974. Wastewater disposal facilities inventory. MPCA,
Minneapolis.
Bishop, Kyle M., and John F. McGuire, 1968. Report on pollution
of lakes Winona, Agnes, and Henry. MPCA, Minneapolis.
Schilling, Joel, 1974. Personal communication (lake map; treatment
requirements at Alexandria). MPCA, Minneapolis.
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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! .‘1 -I ’— I i* •AA11( : T r r50(A
10/30/74
I_t (l I
• —a I ‘‘— I ’
I - ’
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Jtp j • J’)L
sEP OCT
NOV DEC MEAN
YI ’T •L I. • A( A “ L’. - =
C j ft j. r ‘A f j (-. —l (S =
77A 1
?•- ‘
•
-‘
• ‘
.
••. •
1•f
0.49
O . 3
0.19
0.31
0.21
0.07
0.37
77 ()
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•
-
•
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1 .I-
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0.5?
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0.31
0.21
0.08
0.41
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.-
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0.53
0.24
0.21
0.33
0.21
0.08
0.42
?7OI/7
7.-6
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1.11
(.71
u. - 5
O.’.
0.24
0.20
0.31
0.21
0.08
0.40
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SU ’4MAPY
‘II ‘IT-ILY Fl • ‘ AlLY F1) ’S
TQl lITL ,LY ‘ r (.‘I FL. lAY
3.14
TOTAL
FLOw
1 (0
=
14.06
. .71
rOTAL
FLOW
OUT
5.07
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FLOW OAY FLOw
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-------
TRIBUTAI Y FLOW INFORMATION FOR MINNESOTA 10/30/74
LA’
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APPENDIX B
PHYSICAL and CHEMICAL DATA
-------
ST3RET RETRIEVAL DATE 74/10/10
?7A101
45 52 30.0 095 24 12.0
WINONA LAKE
27105 MINNESOTA
1 IEPALES
3
2111202
0010 FEET OEPT’I
r)ATE
F P OM
To
7?/07/0’
7?/O f0 1
7?/ I 0/?P
lIME flF”T -4
OF
DAY FEET
I ) IR 0000
15 0 0000
uc c5 c000
3??1 7
HLP MYL
A
tIC’/L
21, •
71 • 9J
c; lP. J
Ou OIO
00300
00077
00 4
00400
00410
PiIOS—TOT
PHOS—DIS
DATE
TIME
r PT’f
I ATER
DO
T 4NSP
CNDUCTVY
PH
1 ALK
N02&M03
NH3—N
FROM
OF
TEMP
SECCMI
FIFLO
CACO3
N—TOTAL
TOTAL
P4G/L P
TO
DAY
FEET
CtNT
‘lr./L
INCHES
MICROHHO
SU
MG/L
MG/L
MG/L
P46/L
7?/07/06
10 18 0000
20.0
24
340
8.30
139
0.080
0.060
0.058
0.019
10 18 0004
70.1
15.4
340
M.30
139
0.080
0.060
0.079
0.021
10 IR 0009
13.3
7.
345
8.30
138
0.070
0.050
0.059
0.031
7?/09/01
15 10 0000
19.7
22
420
8.40
132
0.130
0.180
0.109
15 10 0004
19. 4
375
8.45
132
0.170
0.190
0.106
0.020
72/11 ) 128
0 3 5 0000
420
8.30
164
0.180
0.160
0.103
0.020
o 55 0004
4.
11.2
400
8.30
160
0.160
0.160
0.126
J VALUE NO N TO t E I J ER O
-------
STOPET RETRIEVAL DATE 74/10/30
27A 102
45 53 07.0 095 23 14.0
WINONA LAt(E
27 MINNESOTA
1 IEPALES 2111202
3 0007 FEET DEPTH
DATE
FROM
TO
TIME DEPTH
or
DAY FEET
72/07/06 10 45 0000
10 45 0004
10 45 0006
72/09/01 15 45 0000
15 45 0004
72/10/28 09 15 0000
09 15 0004
00010
003C0
00077
00094
00400
00410
00630
00610
00665
00666
WATEP
j o
TRA .JSP
CNDUCTVY
PH
1 ALK
N02&N03
NH3—N
PHOS—TOT
PHOS—DIS
TEMP
SECCI -lI
FIELD
CACO3
N—TOTAL
TOTAL
CENT
MG/L
INCHES
MICPOMHO
SU
MG/L
MG/L
MG/L
MG/L P
MG/L P
8.4
330
330
8.40
8.40
129
135
0.050
0.060
0.050
0.060
0.070
0.117
0.022
0.022
9.P
16
330
340
340
380
8.40
8.65
8.50
8.40
140
118
119
157
0.110
0.170
0.160
0.120
0.100
0.200
0.210
0.130
0.104
0.110
0.109
0.108
0.024
0.037
0.033
0.020
20 • I
20 • 1
20 • I
• 4
20 • 0
4.9
3721 7
CHLPPIIYL
A
IJG/L
14.9J
77 PJ
77.
DATE
FROM
TO
72/07/06
72/09/01
7?/10/2R
TIME DE T 4
OF
DAY FEET
10 45 0000
15 45 0000
09 ic 0000
J VALUE KNOWN TO BE IN FRR0
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APPENDIX C
TRIBUTARY and WASTEWATER
TREATMENT PLANT DATA
-------
STORET RETRIEVAL DATE 74/10/30
27t ’1AI LS27AIA1
5 5j 30.0 095 23 00.0
CON LK WINONA 1ST LK-TO Nw
21105 7.5 ALEXANiJRIA W
T/LAKE WINONA
AT r4 DC, W ALEXANDRIA 5T -i AVE.
11EPALES 2111204
0000 FEET DEPTH
00630 006?5 00610 00671 00 6b5
DATE TIME DEPTH NO2 .NO3 TOT KJEL NH3—N PHOS—DIS HOS-I0T
FROM OF N-TOTAL N TOTAL ORTHO
TO DAY FEET MG/L MG/L MC,/L P4G/L P MG/L P
72/10/14 09 00 0.130 2.2’S O 0.160 0.028 0.148
72/11/IS 13 15 0.078 1.800 0.075 0.031 0.110
72/12/15 09 30 0.042 ?.200 0.410 0.017 0.0Y6
73/01/12 13 40 0.014 2.900 1.400 0.026 0.dO O
73/0?/21 09 30 0.010K 3.400 2.000 0.029
73/03/13 13 75 0.168 2.?0O 1.045 0.108 0.20
73/04/05 13 10 O.O 2 3.600 0.380 0.015 0.135
73/04/19 12 30 0.016 1.600 0.017 0.036 0.140
73/05/03 13 05 0.014 2. 00 0.017 0.042 0.15 l
73/05/17 13 15 0.010K 2.100 0.006 0.038
73/06/0 09 ‘ 0 0.?Y0 2.200 0.056 0.006 0.11 ,
73/07/lI 13 00 0.0’7 3.000 0.063 0.028
73/08/23 0.019 2.300 0.019 0.064 0. ri0
73/09/18 13 00 0.03? 2.600 0.038 0.200 0.200
K VALUE KNOWN TO BE LESS
THAN INDICATED
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STORET RETRIEVAL DATE 74/10/30
27A1R1 LS27A1B1
45 53 30.0 095 23 00.0
CON BETW LAKES ,flNONA & AGNES
27 7.5 ALEXANDRIA W
T/LAJ E WINONA
US 52 3RDG NW ALEXANDRIA
11EPALES 2111204
4 0000 FEET DEPTH
00630 00625 00610 00671 00665
DATE TIME DEPTH N02&N03 TO T KJEL NH3—N PHOS—DIS PHOS-TOT
FROM OF N—TOTAL N TOTAL ORTHO
TO DAY FEET MG/L HG/L MG/L HG/L P MG/L P
72/10/14 09 05 0.085 3.250 0.168 0.066 0.310
72/11/15 13 25 0.110 2.000 0.560 0.042 0.170
72/12/15 09 30 0.027 2.400 0.650 0.025 3.189
73/01/12 13 45 0.014 2.900 1.260 0.054 0.240
73/02/21 09 40 0.010K 3.570 1.790 0.079 0.280
73/03/13 13 30 0.120 2.310 0.790 0.054 0.185
73/04/05 13 30 0.010K 3.300 0.027 0.032 0.220
73/04/19 12 40 0.012 3.700 0.050 0.075 0.270
73/05/03 13 10 0.010K 2.275 0.017 0.096 0.315
73/05/17 13 20 0.016 2.250 0.005K 0.096 0.280
73/06/08 09 45 0.610 1.680 0.088 0.006 0.170
73/07/11 13 05 0.044 1.760 0.087 0.027 0.150
73/08/23 0.056 3.300 0.060 0.154 0.410
K VALUE KNOWN TO BE LESS
THAN INDICATED
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STOPET RETRIEVAL DATE 74/10/30
2741C1 LS27A1C I
45 53 30.0 095 22 30.0
CON BETW LK AGNES & 1ST LX SW
27 7.5 AL€XANt)RIA W
T/LAKE WINONA
H Y K DG 1 MI NW ALEXANO iAp3 OADWAY ST.
I1EPALES 2111204
4 0000 FEET DEPTH
OOf’30 00625 00610 00671 00665
DATE TIME DEPTH N02&N03 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
72/10/1k 09 10 0.8 0 8.700 0.740 0.560 0. i10
7?/1l/15 14 00 1.050 4.200 2.300 2.600 2.880
7?/l2/15 10 00 1.840 7.?0O 4.800 3.100 3.300
73/01/12 13 50 1.760 9.600 5.900 3.400 3.600
73/02/21 09 45 1.100 11.000 6.000 3.300 3.700
73/03/13 13 30 0.790 8.800 4.900 2.300 2.630
73/04/05 13 20 1.420 3.950 2.200 2.600
73/04/19 1? 50 2.500 5.200 0.850 2.000 2.5 0
73/05/03 13 15 2.800 5.300 0.770 1.900 2.300
73/05/17 13 ‘5 2.100 6.200 0.060 0.950 2.200
71/06/0 09 50 0.510 7.600 0.180 0.005K 3.300
73/07/11 13 10 1.120 9.200 0.255 0.790 ?.f O
73/08/23 ‘.003 0.990 0.470 1.890 3.100
73/0Q/1’ 13 15 3.500 7.850 0.193 2.100 4.000
1< VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STOPET ‘ ETR1EVAL 1)ATE 74/10/JO
27A151 AS27A IS I P002500
45 53 30.0 095 23 00.0
ALEXANDRIA
27105 7.5 W ALEXANDRIA
0/WINONA LAKE
LAKE WINONA
IIEPALES 2141204
4 0000 FEET DEPTH
00630 006?5 0 1)610 00671 00665 50051 50053
DATE
TIME
0F T,-4
NOPF NO3
TOT KJEL
NI - Il-N
Pi-sOS-DIS
PHOS—TOT
FLOW
CONDUIT
FROM
OF
N—TOTAL
N
TOTAL
OPT I-4O
RATE
FLOW—MGD
TO
DAY
FEET
MG/L
‘IG/L
MG/L
MG/L P
Mr,/L P
INST MGD
MONTHLY
73/02/01
10 00
CP(T)—
11.200
3.900
0.410
3.500
3.700
0.280
0.257
73/02/01
15 00
73/03/01
10 00
CP(T)—
4.200
23.000
6.900
7.200
8.200
0.270
0.250
73/03/01
15 00
73/04/01
10 00
CP(T) —
9.700
.125
(P.060
3.800
4.000
0.270
0.292
73/04/01
15 00
71/05/01
10 1)0
CP(T)—
.1O0
5.100
0.170
2.450
2.900
0.290
0.277
73/05/01
iS 0 1 )
71/06/04
10 00
CP(T)—
4.2C 0
2.700
0.160
1.000
1.000
0.250
0.294
71/06/04
15 00
73/OM/Ol
10 00
CP(T)—
0.100
5.500
0.130
0.960
1.500
0.230
0.247
71/08/01
15 00
71/09/04
10 10
0.013
?.87 0
1.060
0.280
0.252
73/10/01
10 00
C (T)—
C..05O
4. 00
0.055
1.050
1.400
0.210
0.245
73/10/01
IS 00
73/1 1/OP
10 00
CP(T)—
0.690
1.700
0.0P3
1.980
2.000
0.210
0.245
71/11/08
15 00
73/12/07
10 00
CP(T)—
0.240
.8fl0
0.098
3.160
3.512
0.250
0.235
71/12/07
14 00
74/01/0 ’.
10 00
CP(T)—
9.100
5.’.00
0.100
4.500
4.900
0.310
0.266
74/01/04
14 00
74/02/07
10 00
CP(T)—
13.6 00
8.600
O.1?0
2. 0O
b.250
0.260
0.266
74/02/07
14 01)
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