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REPORT
ON
SPRING LAKE
WASHINGTON AND DAKOTA COUNTIES
MINNESOTA
EPA REGION V
WORKING PAPER No, 127
WITH THE COOPERATION OF THE
MINNESOTA POLLUTION CONTROL AGENCY
AND THE
MINNESOTA NATIONAL GUARD
JANUARY, 1975
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1
CONTE NTS
Page
Foreword ii
List of Minnesota Study Lakes iv, v
Lake and Drainage Area Map vi
Sections
I. Conclusions i
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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11
FOREWORD
The National Eutrophication Survey was initiated in 1972 in
response to an Administration commitment to investigate the nation-
wide threat of accelerated eutrophication to fresh water lakes and
reservoirs.
OBJECTIVES
The Survey was designed to develop, In conjunction with state
environmental agencies, information on nutrient sources, concentrations,
and impact on selected freshwater lakes as a basis for formulating
comprehensive and coordinated national, regional, and state management
practices relating to point-source discharge reduction and non-point
source pollution abatement in lake watersheds.
ANALYTIC APPROACH
The mathematical and statistical procedures selected for the
Survey’s eutrophication analysis are based on related concepts that:
a. A generalized representation or model relating
sources, concentrations, and impacts can be constructed.
b. By applying measurements of relevant parameters
associated with lake degradation, the generalized model
can be transformed into an operational representation of
a lake, its drainage basin, and related nutrients.
c. With such a transformation, an assessment of the
potential for eutrophication control can be made.
LAKE ANALYSIS
In this report, the first stage of evaluation of lake and water-
shed data collected from the study lake and its drainage basin is
documented. The report is formatted to provide state environmental
agencies with specific information for basin planning [ 3O3(e)], water
quality criteria/standards review [ 3O3(c)], clean lakes [ 3l4(a,b)],
and water quality monitoring [ lO6 and §305(b)] activities mandated
by the Federal Water Pollution Control Act Amendments of 1972.
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111
Beyond the single lake analysis, broader based correlations
between nutrient concentrations (and loading) and trophic condi-
tion are being made to advance the rationale and data base for
refinement of nutrient water quality criteria for the Nation’s
fresh water lakes. Likewise, multivariate evaluations for the
relationships between land use, nutrient export, and trophic
condition, by lake class or use, are being developed to assist
in the formulation of planning guidelines and policies by EPA
and to augment plans implementation by the states.
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 Koochlching
Bear Freeborn
Bemidji Beltrami
Big Stearns
Big Stone Big Stone, MN; Roberts,
Grant, SD
Birch Cass
Blackduck Beltrarni
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 Honirne 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
Wagonga Kandiyohi
Wailmark Chisago
White Bear Washington
Winona Douglas
Wolf Beltrami, Hubbard
Woodcock Kandiyohi
Zumbro Olmstead, Wabasha
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Inver Grove Heights
Minn.
Map Location
f East Cottage Grove
Cottage .1
Grove
Paul Park
SPRING LAKE
0 Tributary Sampling Site
X Lake Sampling Site
Sewage Treatment Facility
-------
SPRING LAKE
STORET NO. 27A6
I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate that Spring Lake is eutrophic. Of the
60 Minnesota lakes sampled in the fall of 1972, when essentially
all were well-mixed, 45 had less mean total phosphorus, and 55
had less mean inorganic nitrogen. Of all 80 Minnesota lakes
sampled, 41 had less mean chlorophyll a, and only ten had less
Secchi disc transparency.
Reportedly, no particular aquatic nuisance problems, other
than siltation, are known for Spring Lake (Schilling, 1975).
B. Rate—Limiting Nutrient:
Algal assay results show that Spring Lake was nitrogen limited
at the time the assay sample was collected. The lake data indicate
nitrogen limitation at the other sampling times as well (N/P ratios
were less than 11/1).
C. Nutrient Controllability:
1. Point sources—-During the sampling year, Spring Lake
received a total phosphorus load at a rate nearly 30 times the
rate proposed by Vollenweider (in press) as “dangerous”; i.e.,
a eutrophic rate (see page 14). Now, the mean hydraulic reten-
tion time of Spring Lake is less than 60 hours, and Vollenweider’s
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2
model probably is not applicable. Nonetheless, the present
trophic condition of Spring Lake is evidence of excessive
nutrient loads.
It is calculated that even complete removal of phosphorus
at the point sources included in this study would still leave
a phosphorus loading rate about 15 times the eutrophic rate.
However, in view of the questionable applicability of Vollen-
weider’s model to Spring Lake, and the effect of reduced load-
ings on the quality of downstream waters, phosphorus control is
indicated.
Point-source phosphorus control would not be expected to
result in a mesotrophic condition in Spring Lake but should
improve the existing trophic condition. Also, it is likely
that downstream Lake Pepin* would benefit from the reduced
phosphorus load to the system.
2. Non-point sources (see page l4)--During the sampling
year, the mean phosphorus export of the Mississippi River at
station A-5 was just over twice the mean phosphorus export of
the Mississippi at four near-headwater lakes** included in
the Survey; i.e., 37 lbs P/m1 2 /yr (range = 24 to 45 lbs/mi 2 /yr).
This doubling of phosphorus export may have been due only
to changes in land-use practices from the largely-forested
* Working Paper No. 119.
** Lakes Andrusia (WP #81), Bemidji (WP #84), Cass (WP #92), and Wolf
(WP #136).
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3
headwaters area to the more intensively agricultural and
urbanized areas near Spring Lake. It seems probable, though,
that at least part of the export increase was due to incre-
mental contributions of point-source phosphorus along the
course of the river and its tributaries.
In all, it is calculated that non—point sources contributed
nearly 51% of the total phosphorus load to Spring Lake during
the sampling year.
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4
II. LAKE AND DRAINAGE BASIN CHARACTERISTICS
A. Lake Morphometryt:
1. Surface area: 5,910 acres.
2. Mean depth: 8 feet.
3. Maximum depth: 20 feet.
4. Volume: 47,280 acre-feet.
5. Mean hydraulic retention time: 2½ days.
B. Tributary and Outlet:
(See Appendix A for flow data)
1. Tributaries -
Name Drainage area* Mean flow*
Mississippi River 36,800.0 mi 2 9,895.0 cfs
Minor tributaries & 2
immediate drainage - 390.8 mi 243.3 cfs
Totals 37,190.8 mi 2 10,138.3 cfs
2. Outlet -
Mississippi River** 37,200.0 mi 2 10,138.3 cfs
C. Precipitation***:
1. Year of sampling: 35.1 inches.
2. Mean annual: 24.4 inches.
t Schilling, 1974.
* Drainage areas are accurate within ±5%; mean daily flows are accurate
within ±10%; and ungaged flows are accurate within ±10 to 25% for
drainage areas greater than 10 mi 2 .
** Includes area of lake; outflow adjusted to equal sum of inflows.
*** See Working Paper No. 1, “Survey Methods”.
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5
III. LAKE WATER QUALITY SUMMARY
Spring Lake was sampled three times during the open-water season
of 1972 by means of a pontoon-equipped Huey helicopter. Each time,
samples for physical and chemical parameters were collected from two
stations on the lake and from two or more depths at each station (see
map, page vi). During each visit, a single depth-integrated (near bot-
tom to surface) sample was collected from the stations for phytoplankton
identification and enumeration; and during the last visit, a single five-
gallon depth—integrated sample was collected 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 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
(11/04/72)
Parameter Minimum Mean Median Maximum
Temperature (Cent.) 6.1 6.1 6.1 6.2
Dissolved oxygen (mg/l) 106 11.0 11.0 11.4
Conductivity ( imhos) 490 507 510 520
pH (units) 7.8 7.9 7.9 7.9
Alkalinity (mg/i) 176 180 180 184
Total P (mg/i) 0.192 0.218 0.217 0.245
Dissolved P (mg/i) 0.120 0.139 0.138 0.160
NO + NO (mg/i) 0.950 1.168 1.170 1.390
Am onia mg/1) 0.390 0.418 0.405 0.460
ALL VALUES
Secchi disc (inches)
12 20
21 24
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7
B. Biological characteristics:
1. Phytoplankton -
Sampling Dominant Number
Date Genera per ml
06/28/72 1 . Stephanodiscus 4,000
2. Melosira 2,189
3. Scenedesmus 566
4. Rhaphidiopsis 490
5. Gloeocapsa 453
Other genera 1 ,925
Total 9,623
09/03/72 1. Melosira 814
2. Raphidiopsis 524
3. Cyclotella 380
4. Synedra 325
5. Scenedesmus 325
Other genera 2,189
Total 4,557
11/04/72 1. Cyclotella 8,571
2. Flagellates 1,278
3. Microcystis 1,128
4. Fragilaria 677
5. Navicula 526
Other genera 3,309
Total 15,489
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8
2. Chlorophyll a -
(Because of instrumentation problems during the 1972 sampling,
the following values may be in error by plus or minus 20 percent.)
Sampling Station Chlorophyll a
Date Number ( pg/i )
06/28/72 01 27.5
02 34.5
09/03/72 01
02
11/04/72 01
02
C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked -
Ortho P Inorganic N
___________ Conc. (mg/i) Conc. (mg/i ) _____________
0.096 1.430
0.101 1.430
0.106 1.430
0.116 1.430
0.146 1.430
0.146 11 .430
0.096 11 .430
2. Discussion -
The control yield of the assay alga, Selenastrum capri-
cornutum , indicates that the potential primary productivity
of Spring Lake was very high at the time the sample was taken.
Also, the lack of any significant change in yields with in-
creased levels of orthophosphorus, until nitrogen was also
added, shows that this lake was nitrogen limited. Note that
Spike (mg/i )
Control
0.005 P
0.010 p
0.020 P
0.050 P
0.050 P + 10.0 N
10.0 N
7.6
8.8
30.0
22.3
Maximum yield
( mg/i-dry wt. )
34.5
34.8
35.2
36.9
37.6
68.3
49.3
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9
with the addition of only nitrogen there was a significant
increase in yield over the control yield.
Nitrogen limitation is also indicated by the lake data
for each of the three sampling dates; i.e., nitrogen to phos-
phorus ratios were less than 11 to 1 on all occasions.
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10
IV. NUTRIENT LOADINGS
(See Appendix C for 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 at most stations.
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 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 calcu-
lated using mean annual concentrations and mean annual flows. 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/m1 2 /year, at stations C-l, H-i, J-1, and K-i of nearby Lake Pepin and
multiplying the means by the ZZ area in mi 2 .
The operators of the Metropolitan, Newport, St. Paul Park, South
St. Paul, and Cottage Grove wastewater treatment plants provided monthly
effluent samples and corresponding flow data.
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11
A. Waste Sources:
1. Known municipal* -
Name
Pop.
Served
Metro-
politan
Newport
St. Paul Park
Mean Receiving
Treatment Flow (mgd) Water
1,385,400 act. sludge 188.909 Mississippi River
2,922 act. sludge
5,587 trickling
filter
Cottage Grove 13,419 act. sludge
InverGrove
Hts - South } 37,164
St. Paul
2. Industrial - Unknown
trickling
filter
0.180 Mississippi River
0.201 Mississippi River
0.931 Mississippi River
10.210 Mississippi River
* Anonymous, 1974.
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12
B. Annual Total Phosphorus Loading - Sampling Year:
1. Inputs -
lbsP/ %of
Source yr total
a. Tributaries (non-point load) -
Mississippi River 2,793,030 49.4
b. Minor tributaries & immediate
drainage (non-point load) - 66,140 1.1
c. Known municipal STP’s -
Cottage Grove 39,310 0.7
Metropolitan 2,480,300 43.9
Newport 5,180 0.1
St. Paul Park 8,230 0.1
InverGrove Hts. - South
St. Paul 257,440 4.6
d. Septic tanks - Unknown -
e. Industrial - Unknown - —
f. Direct precipitation* - 920 < 0.1
Total 5,650,550 100.0
2. Outputs -
Lake outlet - Mississippi
River 5,488,600
3. Net annual P accumulation - 161,950 pounds
* Estimated.
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13
C. Annual Total Nitrogen Loading - Sampling Year:
1. Inputs -
lbs NI % of
Source yr total
a. Tributaries (non-point load) -
Mississippi River 57,238,330 84.8
b. Minor tributaries & immediate
drainage (non-point load) - 817,770 1.2
c. Known municipal STP’s —
Cottage Grove 108,500 0.2
Metropolitan 8,148,990 12.1
Newport 18,020 <0.1
St. Paul Park 27,820 <0.1
InverGrove Hts. - South
St. Paul 1,067,500 1.6
d. Septic tanks - Unknown -
e. Industrial - Unknown - -
f. Direct precipitation* - 56,940 0.1
Total 67,483,870 100.0
2. Outputs -
Lake outlet - Mississippi
River 75,123,930
3. Net annual N loss — 7,640,060 pounds
* Estimated.
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14
D. Mean Annual Non—point Nutrient Export by Subdrainage Area:
Tributary lbs P/nii 2 /yr lbs N/mi 2 /yr
Mississippi River (at A-5) 76 1,555
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 water would become eutrophic or remain eutrophic;
his “permissible” rate is that which would result in the
receiving water remaining oligotrophic or becoming oligotrophic
if rnorphometry permitted. A mesotrophic rate would be consid-
ered one between “dangerous” and “permissible”.
Note that Vollenweider’s model may not be applicable to
water bodies with very short hydraulic retention times.
Total Phosphorus Total Nitrogen
Units Total Accumulated Total Accumulated
1bs/acr /yr 956.1 27.4 11,418.6 loss*
grams/m’/yr 107.16 3.07 1,279.8 -
Volle weider loading rates for phosphorus
(g/m /yr) based on mean depth and mean
hydraulic retention time of Spring Lake:
“Dangerous” (eutrophic rate) 3.60
“Permissible” (oligotrophic rate) 1.80
* There was an apparent loss of nitrogen during the sampling year. This may
have been due to nitrogen fixation in the lake, solubilzation of previously
sedimented nitrogen, recharge with nitrogen-rich ground water, or unknown
and unsampled point sources discharging directly to the lake (e.g., shore-
line septic tanks). Whatever the cause, similar nitrogen loss has occurred
at Shagawa Lake which has been intensively studied by EPA’s National Eutro-
hi catton Researck and Lake Restorati,on Branch.
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15
V. LITERATURE REVIEWED
Anonymous, 1974. Wastewater disposal facilities inventory. MPCA,
Minneapolis.
Schilling, Joel, 1974. Personal communication (morphometry of Spring
Lake). MPCA, Minneapolis.
_____________• 1975. Personal communication (aquatic nuisance condi-
tions in Spring Lake). MPCA, Minneapolis.
Vollenweider, Richard A. (in press). Input-output models. Schweiz.
Z. Hydrol.
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VII. APPENDICES
APPENDIX A
TRIBUTARY FLOW DATA
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TPIHIPTA Y FLOw rNFo 4MaT1ON F09 MINNESOTA
10/30/74
LA’cF COOE ?7A6
SP+ IN LAKE
TOTAL t)PAINAGE 4OEA OF LAKE 37200.00
SIJR— OPAT”JAGE
TPTI4LJTA ’ 49E4
NORUALIIEI) FLOWS
JAN FF4 MAt 4P MAY JUN JUL AUG
SEP OCT NOV DEC MEAN
77AAAI 37700.00 17S’.4 3 ’4.M 9495.5 23411.0 1001 .0 16447.0 13156.0
?7A6A2 3A900.00 3AAO.u 3710.0 9?A0.0 22 30.0 17570.0 16140.0 12830.0
?7A6ZZ ‘.00.00 90.1’) 9I. O p29.00 562.00 43?.O0 395.00 316.00
TOt L [ ). AINA5E AREA OF IAKE = 37200.00
SIJ’ OF Sl )S—l3+ AINAGE AREAS = 37200.00
MEAN MOWTMLY FL0 ’ S INO OAILY FLOWS
SUMMARY
7987.8 7434.5 7372.5 6121.9 4440.1 10138.2
7790.0 7250.0 7190.0 5970.0 4330.0 9895.0
192.00 178.00 177.00 147.00 106.00 243.29
TOTAL FLOW IN = 121464.75
TOTAL FLOW OUT = J2146 1.75
TPIP1ITARY AONT1
YEA” ‘lEAN FLOW lAY
FLOW lAY FLOW DAY
FLOW
10 7’ 1I ’O O. OO
II 7’ 16300.00
I’ 72 8520.00
I 73 8420.00
2 73 7820.00
1 73 32100.00
4 71 25250.00
5 73 21690.00
A 73 5960.00
7 71 6120.00
71 7900.10
9 73 6?00.n O
I I 77 19NUO. ,0
Ii 7? 159DO. 0
12 77
1 71 ‘.7 10.00
7 71 7610.00
1 71 3130O. . ’)
4 73
5 71 21 fl0.0 ,1
6 73
7 71
8 73
4 73
10 7’
11 7’ 3 l.30
1’ 7?
I 7 202.00
7 71 I 7.00
1 71 711.00
4 71 1 l5c.”
A 7 4 .1.30
6 71 I 4.ut)
7 71 150.0 ’)
8 71
9 71 4’JO.O’)
11300.00
18400.00
+300.0O 10 7300.00
A 130.00
51400.00
32300.00
18700.00
1 6 00.00
6100.00
8600.00
5300.00
11000.00
17900.00
9550.00
25 6520.00
5 43100.00
15 18700.00
7 ?460u.0O
79 9810.00
?2 37 ’ .).00
?5 9160.00
23 4110.00
15 270.00
5 ‘+42.03
233.00
10 I 4.03
I’ 1233.00
1 Q°9.00
7 547.00
II 100.30
I ’ .
75 l Au.30
2? 200.00
?7A AAI
27A AA?
?7AF’ZZ
15
P
10
17
3
19
11
14
26
27
IS
S
7
14 19000.00
10 8390.00
29 19400.00
20 17700.00
lu 205.00
75 140.00
25 1060.00
16 999.00 15
19 172.00
2? 100.00
26 150.00
23 ?00.00
6470.00
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APPENDIX B
PHYSICAL and CHEMICAL DATA
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STORET PETRIEVAL DATL 74/10/30
27A60 1
44 46 05.0 092 57 ‘.2.0
SP IMG LAP E
27 MINNESOTA
1 IFPALES 2111202
3 0011 FEET DEPTH
00010 00300 00077 00094 00400 00410 00630 00610 00665 00666
DATE TIME DE°TH WATER 00 TRANSP CNDUCTVY PH 1 ALK NO? NO3 NH3—N PHOS—TOT PHOS—DIS
FROM OF TE ’ P SECCHI FIFLO CACO3 N—TOTAL TOTAL
TO 1)AY FEET CEP JT MG/L INCHES MICROM’-lO SU MG/L MG/L MG/L MG/L P MG/L P
72/06/28 16 45 0000 23.3 6.3 1? 550 7.69 218 1.600 0.300 0.299 0.210
16 45 0010 23.3 220 1.600 0.330 0.279 0.212
72/09/03 I I 40 0000 24 360 7.80 150 0.420 0.360 0.215 0.164
11 40 0004 19.9 1.9 360 7.80 150 0.430 0.350 0.216 0.157
11 40 0009 19.8 7.8 340 7.78 147 0.430 0.370 0.250 0.168
72/11/06 14 00 0000 23 520 7.90 183 1.390 0.400 0.192 0.120
14 00 (‘004 6.2 11.4 520 7.90 184 1.360 0.390 0.193 0.123
14 00 0011 6. 11.4 520 7.90 181 1.370 0.400 0.193 0.123
3’7 1 7
DATE TIME OFPT’-l CHL PHYL
FROM OF A
TO DAY FEET ‘JG/L
7?/06/?8 16 45 0000 ?7.5J
7?/OQ/O1 1) 40 0000 7. J
72/11/04 14 00 0000
J V. LU KNO. N TO iE IN ER ’)P
-------
ST’)?ET F:TPTEvAL 1it 1€. 1’-/1’ /40
?7A 6 0?
44 4 30.0 o ’ 52 43.0
S ’1,JC, LAcE
. 1r 1wFSr)TA
1lF ALF5 2111202
3 0O 0 FEET ‘)E T -I
r)ATF
FPOI
1 0
1 1’E r)F )T-4
f)A ( FEET
7?/0I5/2 Ii oc ooon
17 O’ I5
72/0 /O I 05 0001)
I? 05 001)’.
I? OS 00 15
72/11/0’. 11 ‘.5 0000
1) -.5 PnO4
11 ‘.5 001’.
( 1 ) 0
00100
00j77
0009’.
00400
0041C
00610
00 10
00665
00666
.,ATEP
1)0
TR4 ”SP
Cr 1 )’JCTvY
P 4
I AL
N0 ? NO3
N 13—N
PHOS—TOT
P-IOS—OIS
TFPIP
SECCHI
F1 L0
C4C03
N-T’)TAL
TOTAL
CfrNT
‘IC ./1
1’ jCHES
4 ICPOM’l(J
SU
MC,/L
MG/L
MG/L
14,/L P
G/L P
P•R
c4 0
7.73
212
1.600
0.390
0.2 4
0.190
.7
540
140
7.70
7.70
205
15?
1.600
0.470
0.410
0.400
0.?70
0.197
0.?01
0.150
7.0
345
7.7 )
154
0.4b0
0.390
0.234
0.150
7.4
340
‘0 0
7.70
7. n
152
176
0.470
0.9 O
0.390
0.410
0.239
0.241
0.154
0.154
10.6
490
7. ()
ii
0.950
0.450
0.242
0.160
1 .6
490
7.91;
179
0.960
0.460
0.245
0.155
20 • 0
• 3
6.1
6.1
322) 7
p p y
A
3’.. Si
4. J
‘?. J
DAIF
TO
7? /O6/?4
7’ /I I/O’.
ij c OEPT 1
()C
)AY F FT
Ii 35 000 ’)
1? 05 CODO
11 ‘.c oooo
J Ve.LUE KNfl’4N ro III Ef 4O .
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APPENDIX C
TRIBUTARY and WASTEWATER
TREATMENT PLANT DATA
-------
STORET RETRIEVAL DATE 76/10/30
27A6A1 LS27A6A I
44 45 30.0 092 52 30.0
MISSISSIPPI RIVER
27 Co #19, SHEET #2
0/SPRING LAKE
US LOCK & DAM 2 N EDGE OF HASTINGS
1 IEPALES 2111204
4 0000 FEET DEPTH
00630 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/I P
7?/I1/05 08 45 1.960 1.500 0.350 0.115 0.210
72/12/02 10 30 1.900 1.845 0.620 0.170 0.252
73/03/17 10 30 2.400 2.200 0.520 0.147 0.390
73/04/03 09 30 2.600 2.100 0.360 0.091 0.190
73/Q4/14 09 30 2.020 2.100 0.230 0.052 0.210
73/05/19 09 45 2.800 1.320 0.198 0.072 0.220
73/06/11 OR 50 2.900 2.000 0.252 0.115 0.250
73/07/14 10 30 2.200 1.260 0.033 0.240 0.350
73/08/26 11 00 0.240 1.680 0.590 0.189 0.290
73/09/2 ? 10 50 0.315 2.300 0.970 0.260 0.390
-------
STORET RETRIEVAL DATE 74/10/30
27A642 LS27A6A?
44 46 30.0 093 01 00.0
MISSISSIPPI RIVER
27 7.5 INVER GROVE
I/SPRING LAKE
BR SPLE 0.75 ESE PINE BEND
11EPALES 2111204
4 0000 FEET DEPTH
00630 00625 00610 00671 00665
DATE TIME DEPTH NO?F NO3 TOT KJEL N}13—N PrIOSDIS PHOS—TOT
FROM OF N—TOTAL N TOTAL ORTHO
TO DAY FEET MG/L MC /L MG/L MG/L P MG/L P
7?/1O/15 15 00 0.026 1.750 0.470 0.120 0.231
7?/I1/0 07 50 0.950 1.500 0.370 0.100 0.189
73/01/21 08 45 1.200 2.100 0.670 0.160 0.290
73/02/25 08 45 0.940 1.700 0.670 0.194 0.320
71/03/25 10 37 3.700 2.000 0.189 0.093 0.210
71/04/15 08 30 2.040 l.6A0 0.132 0.066 0.190
73/04/?9 08 00 ?.40 0 3.000 0.280 0.065 0.185
73/05/07 16 ‘)0 5.500 2.200 0.126 0.092 0.195
71/05/70 10 30 ?e600 ?.450 0.420 0.063 0.170
71/06/29 12 37 2.500 2.100 0.615 0.205 0.345
73/07/22 08 30 0.510 7.400 0.B30 0.300 0.430
73/08/25 11 10 0.260 1.400 0.350 0.190 0.310
73/09/23 14 00 0.350 ?.100 0.690 0.220 0.390
-------
STOPET RETRIEVAL DATE 74/10/30
27A6A3 LS27A6A3
44 53 00.0 093 01 00.0
MISSISSIPPI
27 15 ST PAUL
1/SPRING LAKE
Co HWY 20 BROG BETW INVER GROVE ST PAUL
1 IEPALES 2111204
4 0000 FEET DEPTH
00630 00625 00610 00671 00665
DATE TIME DEPTH NO F,.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?/10/15 15 45 0.020 1.450 0.240 0.089 0.198
7?/1I/05 08 30 0.950 1.500 0.265 0.089 0.180
72/12/10 09 30 1.800 2.500 0.660 0.190 0.370
73/01/21 09 40 1.200 1.980 0.770 0.168 0.315
73/02/25 09 30 0.960 2.200 0.890 0.210 0.380
73/03/25 10 02 3.600 2.200 0.200 0.099 0.210
73/04/15 09 30 2.060 1.760 0.099 0.037 0.165
73/04/29 09 30 1.700 ?.300 0.092 0.050 0.160
73/05/07 17 30 5.500 1.900 0.198 0.160 0.220
73/05/20 09 30 ‘.700 1.980 0.078 0.050 0.155
73/06/29 12 58 2.200 2.200 0.450 0.200 0.360
73/07/22 09 20 0.470 2.310 0.750 0.310 0.470
73/08/25 10 15 0.240 1.F80 0.650 0.220 0.360
73/09/22 15 00 0.132 2.200 0.950 0.270 0.390
-------
STORE! PETRIEVAL DATE 74/10/30
?746A4 LS27A6A4
44 57 00.0 093 04 30.0
‘USSIPPI RIVER
27 15 ST PAUL
T/SPRING LAKE
AT 1 494 BROG RETW NEWPORT & S ST PAUL
11EPALES 2111204
4 0000 FEET DEPTH
00630 00625 00610 00671 00665
DATE TIME DEPTH NO? NO3 TOT KJEL NH3—N PHOS—DIS PHOS-TOT
PROM OF N—TOTAL N TOTAL ORTHO
TO ‘)AY FEET MG/L MG/L M&/L P4G/L P MG/L P
72/10/15 16 35 0.450 1.600 0.260 0.140 0.280
7?/11/05 09 30 0.455 1.M00 0.400 0.180 0.330
7?/12/10 08 35 1.600 2.600 0.690 0.230 0.380
73/01/21 10 15 1.180 1.900 0.630 0.154 0.340
73/02/25 10 00 0.970 1.900 0.700 0.180 0.370
73/03/25 09 ?0 2.900 2.350 3.480 0.147 0.360
73/04/15 10 00 1.5? ?.3 10 0.370 0.098 0.270
73/04/?q 10 10 2.00’) 3.000 0.360 0.140 0.315
73/05/07 18 30 5.01,0 2.700 0.310 0.154 0.290
73/05/20 08 40 2.400 2.500 0.460 0.140 0.290
73/06/29 13 18 p.200 2.000 0.320 0.180 0.320
71/07/27 10 00 0.440 7.730 0.870 0.294 0.480
73/08/25 09 45 0.260 1.470 0.399 0.220 0.330
71/09/23 15 30 0.150 1.800 0.650 0.270 0.420
-------
STORET RETRIEVAL DATE 74/10/30
27A6A 5 LS27A6A5
44 57 00.0 093 04 30.0
MISSISSIPPI
27 15 ST PAUL
T/SPRIrIG LAKE
ST HWY 56 BRDG AT RVSD IND PARK
1 1EPALES 2111204
4 0000 FEET DEPTH
00630 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/I MG/I P MG/L P
72/ 10/iS 17 00 0.340 1.100 0.078 0.038 0.105
7?/1l/0S 10 35 1.100 1.000 0.110 0.058 0.126
7?/12/10 07 30 1.360 1.100 0.200 0.056 0.096
73/01/21 10 45 1.220 1.050 0.280 0.096 0.145
73/02/25 10 35 0.940 0.B40 0.220 0.080 0.100
73/03/25 08 00 2.300 2.200 0.220 0.096 0.270
73/04/1 11 00 1.560 1.700 0.040 0.091 0.175
73/04/29 11 30 1.800 2.700 0.052 0.025 0.130
73/05/07 19 30 4.900 1.980 0.044 0.069 0.165
73/05/20 07 40 2.400 2.730 0.105 0.034 0.150
73/06/30 09 55 1.960 0.960 0.115 0.067 0.160
73/07/22 10 30 0.460 1.’ôO 0.150 0.075 0.160
71/08/25 09 00 0.240 2.310 0.108 0.080 0.150
73/09/23 16 15 0.115 0.840 0.090 0.071 0.145
-------
STORET RETRIEVAL DATE 74/10/30
274681 L 527A6B1
44 47 30.0 092 58 30.0
GREY CLOUD CHANNEL
27 CO #82. SHEET ul
I/SPRING LA (E
GROG 1.5 MI SSW COTTAGE GROVE
11EPALES 2111204
4 0000 FEET DEPTH
00630 00625 00610 00671 00665
DATE TIMF flE TH N02&N03 TOT KJEL NH3—N PHOS—DIS PHOS—TOT
FROM OF N—TOTAL N TOTAL ORTHO
TO DAY FEET MG/I G/L MG/L MG/L P MG/L P
72/11/05 09 45 1.100 1.500 0.115 0.056 0.176
7?/I2/0’ 11 30 1.580 1.845 0.160 0.024 0.138
73/03/17 09 00 2.000 1.Q50 0.680 0.168 0.270
73/04/03 08 45 2.400 1.700 0.098 0.058 0.175
71/04/14 08 30 1.440 2.200 0.053 0.015 0.130
73/05/19 08 45 .740 3.150 0.044 0.017 0.195
73/06/11 0e 40 7.900 2.000 0.260 0.115 0.270
73/07/14 09 0 0.044 2.600 0.970 0.140 0.280
73/08/25 10 15 0.080 2.300 0.126 0.069 0.260
73/09/2? 09 30 0.011 2.360 0.026 0.038 0.220
-------
STORET RETRIEVAL DATE 74/10/30
27A6 5 1 AS27A651 P1385400
44 55 30.0 093 02 30.0
METROPOL ITAN
27 15 ST PAUL
0/SPRING LAKE
MISSISSIPPI RIVER
1 IEPALES 2141204
4 0000 FEET DEPTH
00630 00625 00610 00671 00665 50051 50053
DATE TIME DEDTH NO2 .NO3 TOT KJEL NH3—N PHOS—DIS P1105-TOT FLOW CONDUIT
FROM OF N-TOTAL N TOTAL ORTMO RATE FLOW—MGD
TO DAY FEET MG/I MG/L MG/I HG/I P MG/I P INST MGD MONTHLY
73/02/26 00 00
CP(T)— 0.070 22.000 4.200 2.900 5.900 202.000
73/02/26 24 00
71/03/06 07 00
CP(T)— 0.055 12.000 1.470 1.800 4.200 227.000 190.000
73/03/07 07 00
73/04/04 00 00
CP(T)— 0.069 17.600 5.600 2.150 4.100 198.000 213.000
71/04/05 ‘4 00
73/05/01 07 00
CP(T)— 0.056 12.000 1.680 1.170 2.800 216.000 198.000
73/05/04 07 00
73/06/0 1 07 00
CP(T)— 0.220 1 .6O0 2.300 2.100 3.450 230.000 219.000
71/06/02 07 00
71/07/09 07 00
CP(T)— 0.070 13.800 3.400 2.100 3.500 231.000 218.000
73/07/10 07 00
73/08/06 07 00
CP(T)— 0.090 13.000 1.980 2.720 4.000 245.000 215.000
73/OM/07 07 00
73/09/06 07 00
CP(T)— l4. ’50 2.090 2.700 5.000 214.000 225.000
73/09/07 07 00
73/13/04 07 00
CP(T)— 0.190 16.000 2.100 2.500 4.100 200.000 201.000
71/ 10/OS 07 00
73/11/0’ 07 00
C0(T)_ 0.130 11.000 1.100 2.000 4.800 183.000 194.000
73/11/03 07 00
73/12/04 07 00
CP(T)— 0.140 16.000 1.200 3.150 6.700 184.000 183.000
73/12/05 07 00
-------
STOPET RETRIEVAL DATE 74/10/30
?7A652 TF27A652 D025016*
44 52 30.0 093 02 00.0
S ST PAUL
27 15 ST PAUL
U/SPRING LAt E
MISSISSIPPI RIVER
1IEPALES 2141204
4 0000 FEET DEPTH
00630 00625 00610 00671 00665 50051 50053
DATE TIME DEPTH NO2 NO3 TOT PcJEL NH3-N PHOS—DIS PHOS—TOT FLOW CONOUIT
FROM OF N-TOTAL N TOTAL ORTHO RATE FLOW—MGI)
TO DAY FEET MG/L MG/I MG/L MG/L P MG/I P INST MGD MONTHLY
73/02/26 08 00
CP(T)— 0.035 ?5.000L 21.000 7.560 8.980 8.530
73/0?/27 07 00
73/03/06 08 00
CP(T)— 0.145 35.700 23.100 5.900 6.800 13.300 9.730
73/03/07 07 00
73/04/04 08 00
CP(T)— 0.045 29.000 15.600 5.300 5.900 10.400 12.500
73/04/04 13 00
73/05/03 06 00
CP(T)— 0.315 31.000 13.800 5.100 5.950 11.700 10.300
73/05/04 07 00
73/05/31 OR 00
CP(T)— 0.075 31.000 19.600 7.000 8.000 10.400 10.100
73/06/0 1 07 00
73/07/0? 06 00
CP(T)— 0.150 35.000 22.000 5.500 8.400 10.500 9.660
73/07/01 07 00
73/08/06 08 00
CP(T)— 0.190 31.450 7.900 6.500 7.400 11.800 9.190
73/08/07 07 00
73/09/05 08 00
CP(T) — 0.730 29.900 6.000 9.240 10.000
73/09/06 07 00
73/10/04 OR 00 0.168 39.000 20.000 4.000 9.700 40.200 13.000
71/11/1? 07 00
CP(T)— 0.380 40.000 23.000 8.200 8.800 9.940 9.800
73/11/13 07 00
73/12/02 08 00
CP(T)— 0.010K 33.000 20.000 7.100 8.200 10.300 9.500
71/12/03 07 00
-------
STORET RETRIEVAL DATE 74/10/30
27A653 AS27A653 P002922
44 53 00.0 093 00 30.0
NEWPORT
27 15 ST PAUL
0/SPRING LAKE
MISSISSIPPI RIVER
11EPALES 2141204
4 0000 FEET DEPTH
00630 00625 00610 00671 00665 50051 50053
OATE TIME OE TH NO’ NO3 TOT KJEL NH3—N PHOS—DIS PHOS—TOT FLOW CONDUIT
FROM OF N-TOTAL N TOTAL OPTHO RATE FLOW—PIGD
TO DAY FEET MC,/t. MG/L MG/L MG/L P MG/L P INST MGD MONTHLY
73/02/26 11 00
CPU)— 0.020 31.000 4.400 8.800 11.000 0.154 0.148
73/02/26 13 00
73/03/06 II 00
CP(T)— 0.045 28.000 10.400 8.200 9.600 0.219 0.182
73/03/06 13 00
73/04/04 II 00
CP(T)— 0.025 35.000 13.800 9.950 11.000 0.174 0.137
71/04/04 13 00
71/05/03 10 00
CPU)— 0.280 35.000 18.300 4.950 7.300 0.301 0.294
73/05/03 12 00
73/06/01 I I 00
CP(T)— 0.100 35.700 10.500 5.600 7.900 0.184 0.207
73/06/0 1 13 00
73/07/02 11 00
CP(T)— 0.140 25.200 0.340 5.800 8.300 0.184 0.160
71/07/02 13 00
73/08/07 11 00
CP(T)— 0.167 0.160
73/08/07 13 00
73/09/0’. 11 00
CP(T)— 0.126 27.300 9.200 0.191 0.179
73/09/04 13 00
73/10/04 11 00
CP(T)— 0.070 48.000 22.500 1.320 11.500 0.200 0.174
73/10/04 13 00
73/11/0? 11 00
CP(T)— 0.150 33.000 11.000 6.000 9.900 0.190 0.152
73/11/02 13 00
71/12/03 11 00
CP(T)— ().O?O 33.000 19.000 4.350 7.000 0.168 0.179
73/I?/03 13 00
74/01/OR 11 00
CP(T)— 0.400 24.000 11.600 9.800 12.500 0.171 0.171
74/01/08 13 00
-------
STOPET RET TEVAL DATE 74/10/JO
DATE
FR QM
TO
73/02/?6
CP CT) -
73/02/26
73/03/06
CP CT) —
73/03/06
71/04/04
CP (1)—
71/04/04
71/05/0?
CP CT) -
73/05/0’
71/0i /0 1
CP CT) —
71/06/0 I
73/07/0?
CP (T) -
71/07/02
71/OH/O 7
CP CT) —
73/05/07
73/09/05
CP CT) -
71/! 0/0.
CP (T) —
73/ 0/04
73/1 I/0
CP (T) —
71/1 I/O?
73/12/03
C D CT) -
71/12/01
74/01/OR
CP CT) —
74/01 /OM
TIME DE Tl 00630
OF i’ O2 NO3
DAY FEE N—TOTAL
T MG/L
I 00
11 00 0.195
11 00
13 00 0.125
11 00
13 00 0.115
10 00
1? 00 0.215
11 00
11 00 0.?90
11 00
13 00
I I 00
11 00
11 00
13 00 0.500
ii 00
13 00 0.450
II 00
13 00 0.F• fl0
II 00
13 00 0.R00
11 00
13 00 9.440
2141204
0000 FEET DEPTH
50053
CONDUIT
FLOW—MGI)
MONTHLY
P00 558 7
00625
TOT JEL
N
57.i OO
4P.00 0
44.000
39.900
‘7.000
29.000
50.000
46. 000
51.000
54.000
‘P. 000
00610
NH 3-N
TOTAL
‘1G/L
20.000
33.600
22.500
‘.300
11.600
34.0 00
9.000
40.500
16. 000
27A654 TF274654
44 51 30.0 093 00 30.0
ST PAUL PARK
27 7.5 INVERGROVE H
D/SPRING LAKE
MISSISSIPPI RIVER
1 1EPALES
4
00665 50051
PHO5-TOT FLOW
RATE
MG/L P INST NGD
14.000 0.306
14.500 0.310
13.000 0.320 0.240
11.000 0.342 0.290
13.800 0.345 0.240
10.500 0.280 0.260
0.320 0.220
0.254 0.175
0.370 0.202
0.392 0.280
0.323 0.295
0.352 0.230
00671
PHOS—OTS
OPT HO
MG/L P
II • 600
13.000
11.400
9. 300
2. ?00
9.200
9.500
3.750
7. P00
10 • 400
13. 600
13.000
16.500
14. 000
13.000
-------
STORET RETRIEVAL DATE 74/10/30
- 27A656 AS274656 P013419
44 48 00.0 092 58 30.0
COTTAGE GROVE
27 Co 82 SHEET #1
D/SPRING LAKE
MISSISSIPPI
11EPALES 2141204
4 0000 FEET DEPTH
0063U 00625 00610 00671 00665 50051 50053
DATE TIME DEPTH N0? .N03 TOT KJEL N -I3-N PHOS—DIS PHOS-TOT FLOW CONDUIT
FPOM OF N—TOTAL N TOTAL OPTHO RATE FLOW—MOD
TO DAY FEET h1( ,/L MG/L MG/L MG/L P MG/L P INST MGO MONTHLY
73/02/26 13 00
CPU)— 0.020 49.000 19.000 10.400 15.000 0.966 0.940
73/02/26 13 00
73/03/06 11 00
CP(T)— 1.790 27.000 13.600 8.900 10.000 1.050 0.904
71/03/06 13 00
73/04/04 11 00
CPU)— 0.025 34.000 16.400 9.900 12.000 0.900 1.000
73/04/04 11 00
73/05/03 11 00
CP(T)— 0.230 34.000 13.000 7.750 11.500 0.965
71/05/03 13 00 -
73/06/01 11 00
CP(T)— 0.046 35.000 15.300 2.500 13.000 0.950 0.950
73/06/01 13 00
73/07/0? 11 00
CPU)— 0.130 29.000 16.000 10.600 14.000 0.892 0.918
71/07/02 13 00
73/08/07 1) 00
CP(T)— 1.050 0.919
73/08/07 13 00
73/09/05 II 00
CP(T)— 0.550 14.400 5.250 1.040 0.900
73/09/05 13 00
73/10/04 11 00
CP(T)— 10.600 39.900 17.900 8.900 16.000 0.934 0.930
73/10/04 13 00
71/11/0? 11 00
C (T)— 0.045 71.500 20.000 8.200 23.000 0.937 0.926
73/11/0? 13 00
73/12/03 11 00
CP(T)— 0.370 34.000 16.000 6.700 14.000 0.888 0.900
71/12/01 13 00
74/01/OR 11 00
CP(T)— 0.160 37.500 25.000 6.300 7.900 0.994 0.947
74/01/OR 13 00
-------