U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
WOLF LAKE
BELTRAMI AND HUBBARD COUNTIES
MINNESOTA
EPA REGION V
WORKING PAPER No, J36
PACIFIC NORTHWEST ENVIRONMENTAL RESEARCH LABORATORY
An Associate Laboratory of the
NATIONAL ENVIRONMENTAL RESEARCH CENTER - CORVALLIS, OREGON
and
NATIONAL ENVIRONMENTAL RESEARCH CENTER - LAS VEGAS, NEVADA
697-032
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REPORT
ON
WOLF LAKE
BELTRAMI AND HUBBARD COUNTIES
MINNESOTA
EPA REGION V
WORKING PAPER No, 136
WITH THE COOPERATION OF THE
MINNESOTA POLLUTION CONTROL AGENCY
AND THE
MINNESOTA NATIONAL GUARD
NOVEMBER, 1974
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1
CONTENTS
Page
Foreword ii
List of Minnesota Study Lakes iv, v
Lake and Drainage Area Maps vi , vii
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 4
III. Lake Water Quality Summary 5
IV. Nutrient Loadings 10
V. Literature Reviewed 15
VI. Appendices 16
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ii
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 [ 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 0 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
Bemidji Beltrami
Big Stearns
Big Stone Big Stone, MN; Roberts,
Grant, SD
Birch Cass
Bl ackduck Bel trami
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 Homme 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
Minnewaska 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
Wagoriga Kandiyohi
Walimark Chisago
White Bear Washington
Winona Douglas
Wolf Beltrami, Hubbard
Woodcock Kandiyohi
Zumbro Olmstead, Wabasha
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940 4
Map Location
Lav nia
Q
WOL.
LAKE
274
BEMIDJI, WOLF, ANDRUSIA
CASS LAKES
Tributary Sampling Site
Lake Sampling Site
Sewage Treatment Facility
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II.. , I.inId I 2
Map Location
WOL
LAKE
)01
WOLF
Tributary Sampling Si
Lake Sampling Site
vii
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WOLF LAKE
STORET NO. 27A2
I. CONCLUSIONS
A. Trophic Condition:
Survey data and the records of others (Lang, et al., 1969)
show that Wolf Lake is eutrophic. Of the 60 Minnesota lakes
sampled in the fall when essentially all were well-mixed, 35
had less mean total phosphorus, 29 had less mean dissolved
phosphorus, but only six had less mean inorganic nitrogen. Of
the 80 lakes studied, 55% had less mean chlorophyll a, and 49%
had greater Secchi disc transparency. Marked depression of
dissolved oxygen with depth occurred during the July sampling.
Wolf Lake has been chemically treated a number of times for
control of rooted aquatic vegetation and filamentous algae
(Bonnema and Johnson, 1972).
B. Rate-Limiting Nutrient:
Algal assay results show nitrogen limitation at the time
the sample was collected in October, 1972. The lake data
indicate nitrogen limitation at the other sampling times as
well.
C. Nutrient Controllability:
1. Point sources—-The phosphorus removal facilities
planned for the Bemidji wastewater treatment plant will meet
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2
a mean effluent limit of 1 mg/i (Schilling, 1974). When
operational, these facilities will reduce the total phosphorus
load to Wolf Lake by about 44%. This will reduce the loading
rate from the present 57 lbs/acre/yr (6.4 g/m 2 /yr) to 32 lbs/
acre/yr or 3.6 g/m 2 /yr.
The 3.6 g/m 2 /yr rate is still about twice the rate proposed
by Vollenweider (in press) as a dangerous or eutrophic rate (see
page 14). However, because of the proximity of the Wolf Lake
outlet to the inlet (see map, page vii), it is believed a sub-
stantial degree of short—circuiting of nutrients occurs; i.e.,
under most flow conditions, it is probable that much of the
incoming water (with nutrients) flows more or less directly to
the outlet. Note that only 12% of the phosphorus load and none
of the nitrogen load was retained in the lake during the year.
It is concluded that the degree of phosphorus removal to be
instituted at the Bemidji waste treatment plant will result in
improvement of the trophic condition of Wolf Lake.
2. Non-point sources-—It is noted that the total phosphorus
load measured at the Wolf Lake inlet station (27A2A1) was about
26% greater than can be accounted for by upstream loads. During
the year, the Bemidji STP discharged 29,720 lbs of phosphorus,
and 16,290 lbs were measured in the Lake Bemidji outlet for a
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total of 46,020 Ibs. Add to this the 1,520 Ibs expected from
areal sources between the Lake Bemidj'1 outlet and the Wolf Lake
inlet (38 mi2 at 40 Ibs/mi2/yr [the rate measured at the Lake
Bemidji inlet]), and the expected load at the Wolf Lake inlet
would be 47,540 Ibs for the year. However, the load measured
at the Wolf Lake inlet was 59,710 Ibs of phosphorus or about
12,000 Ibs more than expected.
Personnel of the Minnesota Pollution Control Agency know of
no intervening point sources or nutrient sources such as feedlots,
but they report an 8- to 12-foot fluctuation in water level at the
Otter Tail Power Company hydroelectric dam at station 2715A3
(Schilling, op. cit.). This fluctuation may have resulted in
resolubilization of previously sedimented phosphorus and thus the
excess load at the Wolf Lake inlet station.
The phosphorus exports in the Wolf Lake drainage were very
similar to those of the drainages of the other lakes in this
upper Mississippi River chain of lakes. The relatively low ex-
ports probably result from the near-headwaters location of the
lakes as well as land-use practices in this largely-forested area
of Minnesota.
In all, it is estimated that non-point sources contributed
about 51% of the total phosphorus load reaching Wolf Lake during
the sampling year.
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4
II. LAKE AND DRAINAGE BASIN CHARACTERISTICS
A. Lake MorphometrY :
1. Surface area: 1,051 acres.
2. Mean depth: 28 feet.
3. Maximum depth: 58 feet.
4. Volume: 29,428 acre/feet.
5. Mean hydraulic retention time: 37 days.
B. Tributary and Outlet:
(See Appendix A for flow data)
1. Tributaries -
Name Drainage area* Mean flow*
Mississippi River 668.0 mi 2 396.2 cfs
Little Wolf Lake outlet 10.7 mi 2 5.8 cfs
Mud Lake outlet 0.6 mi 2 0.3 cfs
Miri or tributaries & 2
immediate drainage - 4.8 ml 2.2 cfs
Totals 684.0 mi 2 ** 404.5 cfs
2. Outlet -
Mississippi River 684.0 mi 2 404.5 cfs
C. PrecipitatiOfl***
1. Year of sampling: 26.7 inches.
2. Mean annual: 23.8 inches.
t DNR lake survey map (1941); mean depth by random-dot method.
* Drainage areas are accurate within ±5%; mean daily flow are accurate
within ±10%; and ungaged flows are accurate within ±10 to 25% for
drainage areas greater than 10 mid.
** Includes area of lake.
*** See Working Paper No. 1, “Survey Methods”.
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5
III. LAKE WATER QUALITY SUMMARY
Wolf Lake, one of a chain of upper Mississippi River lakes (see map,
page vi), 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 a number of depths
at the one station on the lake (see map, page vii). During each visit
two depth-integrated (15 feet to surface) samples were collected for
phytoplankton identification and enumeration and for chlorophyll a
analysis; and during the last visit, a single five-gallon depth-integrated
sample was collected for alqal assays. The maximum depth sampled was 28
feet.
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
(10/21/72)
Parameter Minimum Mean Median Maximum
Temperature (Cent.) 6.1 6.2 6.3 6.3
Dissolved oxygen (mgll) 10.0 10.7 10.2 12.0
Conductivity ( mhos) 248 251 248 260
pH (units) 8.3 8.3 8.3 8.3
Alkalinity (mg/i) 143 146 146 147
Total P (mg/l) 0.050 0.063 0.061 0.080
Dissolved P (mg/i) 0.02i 0.026 0.025 0.034
NO + NO (mg/i) 0.020 0.032 0.030 0.050
Am onia mg/l) 0.040 0.052 0.055 0.060
ALL VALUES
Secchi disc (inches) 33 47 60
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7
B. Biological characteristics:
1. Phytoplankton —
Sampling Dominant Number
Date Genera per ml
07/11/72 1. Aphanotheca 8,986
2. Dinobryon 399
3. Anabaena 181
4. Fragilaria 109
5. Tabellaria 36
Other genera 72
Total 9,783
09/08/72 1. Anabaena 987
2. Microcystis 475
3. Flagellates 264
4. Oscillatoria 158
5. Melosira 128
Other genera 656
Total 2,668
10/21/72 1. Melosira 8,163
2. Fragilaria 1,566
3. Anabaena 1 ,144
4. Stephanodiscus 361
5. Flagellates 361
Other genera 935
Total 12,530
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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 )
07/11/72 01
09/08/72 01
10/21/72 01 25.8
C. Limiting Nutrient Study:
1. Autociaved, filtered, and nutrient spiked -
Ortho P Inorganic N
- . Conc. (mg/i) Conc. (mg/i ) _____________
0.022 0.056
0.027 0.056
0.032 0.056
0.042 0.056
0.072 0.056
0.072 10.056
0.022 0.056
13.0
12.7
Maximum yield
Spike (mg/i ) ___________ ___________ ( mg/i—dry wt. )
Control 1 .6
0.005 P 2.0
0.010 P 2.1
0.020 P 1.9
0.050 P 2.3
0.050 P + 10.0 N 26.4
‘10.0 N” 1.7
2. Discussion —
The control yield of the assay alga, Selenastrum capri-
cornutum , indicates that the potential primary productivity
was moderate at the time the sample was collected; however,
there was a loss of 51 pg/i of inorganic nitrogen and 21
pg/i of dissolved phosphorus between the time the sample was
collected and the assay was begun. Had this loss not occurred,
the expected control yield would have been about 3 mg/i.
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9
The lack of significant yield response to increasing levels
of orthophosphorus until nitrogen was also added shows that the
lake was nitrogen limited when sampled. Through an oversight,
rio nitrogen was added to the “10.0 N” flasks; and, therefore,
the yield was the same as the control.
The lake data indicate nitrogen limitation at all sampling
times (the July N/P = 9/1; the September N/P = 12/1; and the
October N/P = 3/1).
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10
IV. NUTRIENT LOADINGS
(See Appendix C for data)
For the determination of nutrient loadings, from October, 1972
through September, 1973, the Minnesota National Guard collected monthly
near—surface grab samples from each of the tributary sites indicated
on the map (page vii), except for the high runoff month of April, when
two samples were collected, and the colder months when samples were
omitted at most stations because of low flows.
Through an interagency agreement, stream flow estimates for the year
of sampling and a “normalized” or average year were provided by the Minne-
sota District Office of the U.S. Geological Survey for the tributary 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 unsampied “minor
tributaries and immediate drainage” (“ZZ” of U.S.G.S.) were estimated by
using the means of the nutrient loads, in ibs/mi 2 /year, in tributaries of
nearby Leech Lake at stations 2746C-1 , D-l , F—i , G—i , H—l , and J-l and
multiplying the means by the ZZ area in m1 2 .
The operator of the Bemidji wastewater treatment plant provided monthly
effluent samples and corresponding flow data. In this report it is assumed
that all of the nutrients discharged at the Bemidji plant reached Wolf Lake.
In the loading tables that follow, the loads attributed to the Mississ-
ippi River inlet are those measured at station A—i minus the Bemidji loads
(but see discussion on pages 2 and 3).
* See Working Paper No. 1.
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11
A. Waste Sources:
Known municipal -
Pop. Mean Receiving
Name Served* Treatment Flow (mgd) Water
Bemidji 11,400 trickling 0.942 Mississippi
filter River
2. Known industrial — None
* 1970 Census.
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12
B. Annual Total Phosphorus Loading — Average Year:
1. Inputs —
lbsP/ %of
Source yr total
a. Tributaries (non-point load)
Mississippi River 29,980 49.7
Little Wolf Lake outlet 220 0.4
Mud Lake outlet 10 <0.1
b. Minor tributaries & immediate
drainage (non-point load) — 130 0.2
c. Known municipal -
Bemidji 29,730 49.3
d. Septic tanks* - 80 0.1
e. Known industrial - None - -
f. Direct precipitation** - 160 0.3
Total 60,310 100.0
2. Outputs -
Lake outlet - Mississippi River 52,790
3. Net annual P accumulation - 7,520 pounds
* Estimated 74 dwellings, 4 resorts, and 1 camp on shoreline; 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)
Mississippi River 433,020 76.5
Little Wolf Lake outlet 8,320 1.5
Mud Lake outlet 600 0.1
b. Minor tributaries & immediate
drainage (non-point load) - 6,000 1.1
c. Known municipal -
Bemidji 105,010 18.6
d. Septic tanks* - 2,800 0.5
e. Known industrial - None -
f. Direct precipitation** - 10,130 1.7
Total 565,880 100.0
2. Outputs -
Lake outlet - Mississippi River 733,380
3. Net annual N loss - 167,500 pounds
* Estimated 74 dwellings, 4 resorts, and 1 camp on shoreline; see Working
Paper No. 1.
** See Working Paper No. 1.
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14
D. Mean Annual Non-point Nutrient Export by Sub-drainage Area:
Tributary lbs P/mi 2 /yr lbs N/m1 2 /yr
Mississippi River inlet 45 648
Little Wolf Lake outlet 21 778
Mud Lake outlet 17 1,000
E. Yearly Loading Rates:
In the fol1owin j 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 permissib1e 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
1bs/acr /yr 57.4 7.2 538.4 loss*
grams/me/yr 6.43 0.80 60.3 -
Vollenweider loading rates for phosphorus
(g/m 2 /yr) based on mean depth and mean
hydraulic retention time of Wolf Lake:
“Dangerous” (eutrophic rate) 1.76
“Permissible” (oligotrophic rate) 0.88
* The apparent loss of nitrogen during the sampling year may have resulted
from nitrogen fixation in the lake, solubilization of previously sedimented
nitrogen, recharge with nitrogen-rich ground water, or insufficient samp-
ling. However, a similar nitrogen loss has been observed at Shagawa Lake
which has been studied intensively by EPA’s Eutrophication Research and
Lake Restoration Branch.
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15
V. LITERATURE REVIEWED
Anonymous, 1973. Wastewater disposal facilities inventory. MPCA,
Minneapolis.
Bonnema, Kenneth, and William G. Johnson, 1972. Control of aquatic
vegetation, algae, leeches and swimmer’s itch in 1971. MN Dept.
Nat. Resources, St. Paul.
Hoekstra, Donald J., 1968. Nitrogen and phosphorus analysis of six
Mississippi headwaters lakes. MS, N.S.F. Limnology Inst.,
Bemidji St. Col1. , Bemidji.
Kahn, Joseph H., Lyle K. Krusemark, and John R., Oakley; 1968. A
partial limnological survey of two Minnesota lakes. MS, N.S.F.
Lirnnology Inst., Bemidji St. Coil., Bemidji.
Lang, D. E., J. F. McGuire, and K. t’1. Bishop; 1969. Report on
investigation of water quality of Wolf, Andrusia and Cass lakes.
MPCA, Minneapolis.
Schilling, Joel, 1974. Personal communication (lake map; treatment
requirements at Bemidji SIP; operation of Otter Tail Power hydro
dam). 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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TR1A1JTA Y FLOW INFORMATION FOR MINNESOTA
10/30/74
LA (E CODE 7762
WOLF LAKE
TOTAL DRAINAGE ARLA OF LAI(F
694.00
TOTAL DRA!NAc,v AREA OF LAKE =
SU 1 OF SUP—DRAINAGE APEAS =
TRIRUTARY MONTH
YEAR IEAN FLOW DAY
FLOW DAY FLOW DAY
FLOW
10 72
i i 72
I? 77
1 73
2 73
3 73
4 73
5 73
6 73
7 73
9 73
9 73
10 72
11 7’
12
1 73
7 73
- 73
4 73
5 73
F, 73
7 73
9 71
9 71
?48.C0
203.00
304.00
?R0 .00
21 O.G0
647.00
?‘O • 00
?1 8.00
20?. 00
NQ. 00
213.00
Jsl S.00
?53. 0O
208.00
3uP.00
780 • 00
21 2.00
6sc .,0
? 39•fl ()
??5.00
‘11.00
193.00
232.00
100 .00
SUR—DRA LNAC’
TPTPUTAQY AREA
JA FEP MAR
AI R MAY
NORMALIZED FLOWS
JUN JUL AUG
?7A?A1
669.00
249.05
I9O.. 6
?30. 54
910.48
936.74
699.40
199.43
404.32
?7A2A?
684.00
‘46.u7
192.4?
‘33.48
933.90
958.22
715.02
38O.3
218.88
286.01
268.49
3.99
2.56
2.25
5.82
?7A?81
10.70
1.7w
1.16
‘.41
13.20
15.80
12.80
6.10
2.71
5.10
0.09
0.08
0.28
274?C1
0.60
0.Oh
0.02
0.14
0.84
0.79
0.74
0.31
0.06
0.11
0.16
0.82
2.22
?7A?ZZ
4.77
0.16
0.45
1.21
5.46
5.66
5.75
2.21
0.72
1.72
1.09
SEP OCT NOV DEC MEAN
MEAN MONTHLY FLOWS AND DAILY FLOWS
SUMMARY
694.00
FLOW OUT = 4848.50
684.07
276241
?7A?A2
14 327.00
5 203.00
10 295.00
20 244.00
18 210.00
17 1941.00
1 233.00
19 201.00
8 168.00
II 213.00
16 365.00
14 334.00
S 208.00
10 299.00
?0 244.00
212.00
17 1965.00
1 253.00
19 20 .OO
9 163.00
11 202.00
16 348.00
14 202.00
14 220.00
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I I — ii F LO ‘ ! N 0 ”’’ i 11 . F )_) I E SO F A
10/3 ( 1/14
LA(F C01 ’ )7’7 I
‘ F i ‘ i ) i —I_ Y L’ ‘- • (A 1 ‘ 1
rl j( ITA. y M01 1 V ‘1 : ‘A rt_(I.I ‘‘AT’ FL ( I ’
77A I I) “ ‘ I’ . ‘4.’11}
11 7 — 2 , - ’ —
I — / ‘ I’ 3. •1
1 . “• 1.7 )
7 l.’. 1’ 1. ’1
- 7 17
6 4._ 3 I l 4’ 4.00
5 7 i 4•77 I 3.-TO
7_•
7 1 )•‘ - , k
7T T.’- ii J . u
C) / / .11 1 —
10 14
II /7 (“.I-+ — (,.1O
7 /2 . ‘, 1?
1 7 7 (.10
7 7i r ’.,7 I:i 0.0?
u.3 17 1.IJ
4 7 , 1J. ’ 0.30 1’ 0.20
.- ‘ i-
F
7 7 ‘.t’- 0.14
11 0.23
.4 7 1f
V 1 . ) I’ 1.30
II 72 . ‘ I -J
li 1.21
-S )(
7 7 ,,• /_ I 0.5 ’)
- (‘1 3 ’ /’ ( 17
4 I ( 1. . 1 2.13
71 1-. 1.71
7 7_ ’ ).)‘ . 1.10
Ii 1.’ - - 11 1.7u
9 7 1. 4 1A 2.10
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APPENDIX B
PHYSICAL and CHEMICAL DATA
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STORET RETRIEVAL DATE 74/10/30
27A201
47 25 30.0 094 40 30.0
WOLF LAKE
27 MINNESOTA
I1EPALES 2111202
4 0027 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 “IG/L INCHES MICPOMHO SU MGIL MG/I MG/I MG/L P MG/I P
7?/07/11 17 30 0000 33
17 30 0004 24.3 13.0 270 8.70 137 0.070 0.080 0.038 0.023
17 30 0015 19.4 6.0 300 8.00 143 0.070 0.080 0.027 0.012
17 30 0020 17.0 7.0 340 7.40 164 0.050 0.100 0.042 0.017
17 30 0027 11.4 0.4 355 7.20 169 0.110 0.630 0.249 0.078
7.109/08 18 00 0000 60 280 8.10 139 0.060 0.150 0.047 0.018
18 (10 0004 18.4 6.7 280 8.10 139 0.060 0.140 0.050 0.018
18 00 0015 17.4 6.4 283 7.90 139 0.050 0.190 0.037 0.015
18 00 0020 17.’. 3.3 290 7.50 146 0.050 0.490 0.071 0.043
18 00 0027 16.6 5.7 293 7.50 148 0.050 0.490 0.075 0.045
72/10/21 11 40 0000 48 260 8.30 143 0.040 0.060 8.050 0.021
11 40 0004 6.3 12.0 248 8.30 145 0.050 0.060 0.066 0.025
11 40 0015 6.3 10.0 248 8,30 147 0.020 0.040 0.056 0.026
Ii 40 0028 6.1 10.2 248 8.30 147 0.020 0.050 0.080 0.034
3’217
DATE TIME DEPTH CHLRPI’YL
FROM OF A
TO DAY FF T UG/L
7?/07/11 ii 30 0000 13.OJ
7/09/08 18 00 0000 12.7 )
72/10/21 11 40 0000
J VALUE KNOWN TO BE IN ERROR
-------
APPENDIX C
TRIBUTARY and WASTEWATER
TREATMENT PLANT DATA
-------
STO FT ETP!’VAI I)i T 7L 4 /10/. 0
274241 LS2742A)
47 ‘7 00.0 094 42 10.0
M ISSISSh -’PI
27 C D u’.. SHEET tsI
1/’ OLF LAKF
CO riwY 2 N41 UPSTPEAfrIWOLF L4 cE
1IEPALES 2111204
4 0000 FEET DEPT-s
°0 l0 0fl 71
DATE TIME ) TH ID7\ u3 Tut JF1 13—N PriOS—fliS PHOS—TOT
OM OF —TOT 1 N T)IAI U’ TriO
TO 1)A! FF T /L l ’,/L 1 /L MG/L MG/L r
77/10/it. 1210 ‘.0 ) 0.,S0 0.0J4 0.042 0.054
7?/fl/0’-’ 11 V 0 . ’ 0 (i.0 7 ) 0.053 0.0 2
71/03/1 1047 0.lfli D.0 2 0.072 O.10
73/04/01 I 40 .t )3I c.4Rrj .0i0 fl.012
73/04/14 ‘)O 8 0.01fl’ 0. ’ )flu 3.0 0.1)10 0.0 S
7 3 /Q 5/Jq 1 ’ 41 ).O10’ 0. -J9 c . ( ( sc 0.020 0.0 55
73/Q /l)1 10 C 1J.0lC c 0.— ’-’D 0.033 0.170
73/07/0 - l ) 50 1.010 0.7 ) 0.( 3? 0.0 6 o.075
71/0’ /11 )4 Tfl .01 -’ (‘. ) i.0?0 0.04 0.085
73/0’ /1 10 ‘5 ‘.O74 G. ’t) 1.06fl 0.055 0.085
K V”L(JE r. NOWN TO r E LF’ S
THAN I’ !CATEfl
-------
T’RT v e 7./1’iO
27CC 1
‘7 30.0 J94 40 . O.0
‘flVE1
CO 4, S-iF T 1
0/ OLF LAIc
CO H ’Y - ‘J6 .75 I UPS1RMLI ANOPUSIA
11ET ’- ALES 2111204
4 U000 FEET DEPTH
C 3 j
‘0 - ’
t u(-1’)
Out 71
JAT
F1 r
- T--1
t) 1 ) 3
t’ r r j L
- os—njc
PH0S—1’)r
ru-
AL
r
TOT t L
O THO
T )
F F
‘ ‘‘/L
1 A/L
4h/L
1
M /L ,.)
7?/I)/1 .
l7( O
‘.0 3’
G.O1
U.C5
7?/1I/O
Ii
‘
.JI
). 1(.
‘.1?C
0.014
0.O3’
7 /CI/2
1’)
O
).P ,
C.O6
O.0 5
7 /j1/17
,q
.2
.t7’-
). ‘ 2
.14L,
7VU’4/0I
14
‘C
).‘-‘(C
‘J.C0
73/ / i
l,
C4
0.00C
7 /N /03
10
fl
.u1 c
C.°3 i
‘).013
0.03’,
73/j7f0
.(,!j’
•‘.)Il
O.tfl
l ”(i - ”iI
C
.eI
).3 ’
‘.! lC’
0.fl ’T
0.07,
7 3/L /l
13
?fl
‘.‘J1
l.0:
.1I
0.0 0
i< VALIJi - r t’4 Lqf\J TO -3 L - SS
F -V N I’J’)1Ct TFi)
-------
STOQFT TR1 Vai 1 ATL 74/l(’/ O
LS27A2B1
‘+7 24 30.0 09’ 40 10.0
LITTLE WOLF LK/WOLF LK CONNECT
CO *s29
T/ OLF LA,(E
Ar ‘NO XING NEAR 0LF LAt(E SHOPE
fl PALES 2111204
4 0000 FEET DEPTH
00610 00671 006b
[ ATr Tj’i )E TH ‘ O’ ’O3 TOT V JEL (JH3—N PH()S—1)i Pt-iOS—TOT
PO’ i or , —TorAL TOTAL OPTHO
T3 flAY FEET /L ‘ U/L M ’/L Mr,/L P M(/L P
7?/1O/1 ’ .03r ‘•4 fl 0.03 0.006 0.Q2
7?/lI/0S 11 SO ‘ ‘.O17 3.’ +0t) 0.073 0.010 0.O1.’
73/0 Vii 10 0’. O.7 ,0 J.040 0. 005K 0.010
73/i ’/O1 14 40 1.3” 0.031 0.005K 0.005 <
71/C4/1’. 10 15 3.017 fl•44(J 0.009 0.00 5K 0.010
71/0c/1 i r,.o ls 0.4 O 0.007 0.005K 0.010
71/06/03 11 00 3.013K 0.660 0.017 0.00 5K 0.035
71/07/0 I I S t,.0 i- + 0.034 0.025
71/0 /1i oc 71 .01UK 0.70’ 0.030 0.007 0.030
71/rC /1A 10 ‘S U.0 ”D 0.340 0.035 0.011 0.02’)
K V LU KNOWN TO r3E L S
Trf N IN [ )ICATEI)
-------
ST’)’ ET PETRIFVai OAEr 7’ /1)/i0
27A2C1 LS27A2C1
47 ?4 00.0 094 41 00.0
i1’’fl LK / WOLF LAKE CONNECTION
27 CO 13
T/. OLF LAKE
AT SECONDARY ROAD CROSSING
1 IE°ALES 2111204
4 0000 FEET DEPTH
C’ 63fl 00 ’5 00610 00611 00665
D TF TIMF rF0T- iO SNO3 TOT KJFL NH3-N PHOS—DIS PHOS—TOT
FR JM f’J—T )TAL N TOTAL ORT-iO
TO AY FFFT MG/L 1(,/L M(,/L HG/L ‘-‘ MG/L P
72/10/14 C,0’.’ Ø• 75 :i. 02 2 0.00 5K 0.O?1
7?/fl/0’, 11 45 0.319 0.470 0.0 4 0.00k 0.014
7?/1?/10 ii e0 0.01’)K 0.11i. 0.140 0.007 0.018
73/01/70 11 05 O.010 0.T?0 0.220 0.005K
7l/U2/1 i 13 10 u.027 I.RQO 0.300 0.007 0.025
71/01/17 tO ( 0 0.054 1.260 0.420 0.010 0.025
71/04/01 16 50 i .0 o O. 00 fl.13? o. 009 0.O?5
71/04/14 tO 10 ).0 6 O.LeMO 0.035 0.005K 0.015
71/0S/1 10 SM 0.01? 1.?O0 0.021 0.005K 0.025
71/06/01 10 0 0.010K ].031 0.005K 0.015
71/07/0U 11 00 0.014 ?. Ou 0. 3O 0.005K 0.035
74/0 /1l 0’3 20 0.03 ’ 0.540 0.037 0.008 0.030
71/09/16 10 30 0.05 ?.j O O 0.092 0.00 0.025
K V LUE r NOWN TO -3 LESS
THAN INr)ICATrD
-------
STORET RETRIEVAL DATE 741)0/30
27A25 1 TF27A251 P011490
47 29 30.0 094 50 00.0
BEMIDJI
27 Co #4 SHEET #1
T/WOLF LAKE
MISSISSIPPI RIVER
1 1EPALES 2141204
4 0000 FEET DEPTH
00630 00625 00610 00671 00665 50051 50053
DATE TIME DEPTH NO? N03 TOT XJEL NN3-N PHOS—DIS PHOS—TOT FLOW CONDUIT
FROM OF N—TOTAL N TOTAL ORTHO RATE FLOW—MGD
TO DAY FEET MG/L MG/L MG/L MG/I P MG/L P INST MGD MONTHLY
73/01/29 11 00
CPU)— 1.250 39.900 22.000 5.400 8.400 0.785 0.984
73/01/29 13 00
73l02/28 10 30
CP(T)— 1.260 41.000 24.000 8.200 9.000 1.000 0.900
73/02/28 12 30
73/03/30 10 30
CP(T)— 2.300 26.000 11.600 9.200 9.600 0.900 0.866
73/03/30 13 00
73/04/30 1) 00
CPU)— 2.100 30.000 13.200 6.200 10.300 1.000 0.846
73/04/30 13 00
7 /05/31 11 00
CP(T)— 2.820 42.000 25.100 8.890 11.500 1.350 1.000
73/05/31 13 00
73/06/29 11 00
CPU)— 2.200 31.000 16.400 6.600 9.900 1.200 1.200
73/06/29 13 00
73/07/31 ii 00
CP(T)— 2.800 26.000 7.000 3.300 9.680 1.000 1.000
73/07/31 13 00
73/09/04 10 30
CP(T)— 2.0 0 28.600 8.100 1.200 1.000
73/09/04 12 30
73/10/01 ii 00
CP(T)— 1.050 31.500 20.000 7.000 10.500 0.925 0.900
73/10/01 13 00
73/10/31 1? 00
CPU)— 0.540 40.000 18.000 6.000 12.000 0.950 0.900
73/10/31 14 00
73/11/30 I I 00
CP(T)— 0.060 49.000 28.000 4.900 11.000 0.870 0.790
71/11/30 13 00
74/01/02 11 00
CP(T)— ‘.OOO 31.500 21.000 10.600 11.500 0.900 0.977
74/01/02 13 00
-------
?7A?51 TF274251 P0114 90
‘.7 ? 30.0 0 44 co 00.0
kE 1fl)JI
27 CO 4 S’-jEFT #1
J/qr) f LAKE-
‘ !ssIscI°P1 P V R
1 1Fj- ALES
‘4
74/J?/O ’ 10 00
CP (T) -
7 ’./0?/O 17 00
•37) 17.’00
ST’)’ ET PET ’ [ c VnI •)ATI: 7 ’/J ,/ju
j1 ’• j
O ) 10
0067)
00 -’ ’6
50051
50053
OATF
T I -
)E T-1
‘JO7 NUj
TJI JE1
rj-i3 — j
P-iOS—OIS
PHOS—TOT
FLOw
CONDUIT
FQf) i
o
J—TUTAI
J
TOTAL
OPTHO
IRATE
FLOW—MGO
TO
). Y
FRET
M’/L
‘ 1r /
1f,/L
4C’/L P
M(,/L P
INST M ,D
MONTHLY
2141204
0000 FEET DEPTH
1 7.&flO
12.500
U • 950
0 • 932
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