U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
SPIRITTOD LAKE
STUTSFIAN COUNTf
NORTH DAW3TA
EPA REGION VI11
WORKING PAPER No, 576
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
•&G.P.O. 699-440
-------
REPORT
ON
SPIRITTOD LAKE
SIUTSTON COUNTY
NORTH EAMJTA
EPA REGION VI11
WORKING PAPER No, 576
WITH THE COOPERATION OF THE
NORTH DAKOTA STATE DEPARTMENT OF HEALTH
AND THE
NORTH DAKOTA NATIONAL GUARD
OCTOBER, 1976
-------
CONTENTS
Page
Foreword i i
List of North Dakota Study Lakes and Reservoirs iv
Lake and Drainage Area Map v
Sections
I. Introduction 1
II. Conclusions 1
III. Lake Characteristics 3
IV. Lake Water Quality Summary 4
V. Literature Reviewed 8
VI. Appendices 9
-------
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 freshwater 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 [§303(e)], water
quality criteria/standards review [§303(c)], clean lakes [§314(a,b)],
and water quality monitoring [§106 and §305(b)] activities mandated
by the Federal Water Pollution Control Act Amendments of 1972.
-------
iii
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
freshwater 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 North Dakota State Depart-
ment of Health for professional involvement, to the North Dakota
National Guard for conducting the tributary sampling phase of the
Survey, and to those North Dakota wastewater treatment plant oper-
ators who voluntarily provided effluent samples and flow data.
Norman L. Peterson, Director, and the staff of the Division
of Water Supply and Pollution Control of the Department of Health,
provided invaluable lake documentation and counsel during the
Survey, reviewed the preliminary reports, and provided critiques
most useful in the preparation of this Working Paper series.
Major General LaClair A. Mel house, the Adjutant General of
North Dakota, and Project Officer Colonel Irvin M. Sande, who
directed the volunteer efforts of the North Dakota National
Guardsmen, are also gratefully acknowledged for their assistance
to the Survey.
-------
IV
NAME
Ashtabula
Audubon
Brush
Darling
Devils
Jamestown
LaMoure
Matejcek
Metigoshe
Pelican
Sakakawea
Spiritwood
Sweet Briar
Whitman
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES AND RESERVOIRS
STATE OF NORTH DAKOTA
COUNTY
Barnes, Griggs
McLean
McLean
Renville, Ward
Benson, Ramsey
Stutsman
LaMoure
Walsh
Bottineau
Bottineau
Dunn, McKenzie,
McLean, Mercer,
Mountrail, Wil-
liams
Stutsman
Morton
Nelson, Walsh
-------
47 08'-
SPIRITWOOD LAKE
Tributary Sampling Site
X
Lake Sampling Site
2 3
Scale
Spring
98*36
4 Km.
2 Mi.
erf!
N. Dak.
Map Location
9832
47'04.
9828
-------
SPIRITWOOD LAKE
STORE! NO. 3813
I. INTRODUCTION
Spiritwood Lake was included in the National Eutrophication Survey
as a water body of interest to the North Dakota Department of Health.
Because of little or no flow, only one tributary sample (station A-l)
was collected; therefore, this report relates only to the lake sampling
data. However, the tributary sampling data are included in Appendix D
for the record.
Spiritwood Lake is a typical prairie lake. The primary uses of the
lake include recreation and fishing. A major source of water to the lake
is a watershed to the northeast and one to the northwest of the lake. The
lake has no outlet except for overflow discharge into Seven Mile Coulee.
Nutrients reaching the lake are from agricultural activities in the drainage
and from lakeshore dwellings (Peterson, 1974).
II. CONCLUSIONS
A. Trophic Condition:
Survey data indicate that Spiritwood Lake is eutrophic. It
ranked eighth in overall trophic quality when the 14 North Dakota
lakes sampled in 1974 were compared using a combination of six
water quality parameters*. Seven of the lakes had less median
total and dissolved phosphorus, ten had less median inorganic nitro-
gen, nine had less mean chlorophyll a_, and three had greater mean
* See Appendix A.
-------
2
Secchi disc transparency. Depletion of dissolved oxygen occurred
with depth at both stations in July.
Survey limnologists noted a heavy algal bloom in July and
shoreline macrophytes in July and September. Severe impairment
of use of the lake due to heavy algal blooms and excessive weed
growths has been reported (Peterson, 1975).
B. Rate-Limiting Nutrient:
The algal assay results indicate that Spiritwood Lake was
limited by nitrogen at the time the samples were collected (04/26/74
and 09/17/74). The lake data indicate nitrogen limitation at all
sampling stations and times.
-------
3
III. LAKE AND DRAINAGE BASIN CHARACTERISTICS"1"
A. Lake Morphemetry :
1. Surface area: 1.67 kilometers2.
2. Mean depth: 8.8 meters.
3. Maximum depth: 16.2 meters.
4. Volume: 14.696 x 106 m3.
5. Mean hydraulic retention time: Unknown.
B. Precipitation*:
1. Year of sampling: 60.7 centimeters.
2. Mean annual: 47.7 centimeters.
t Table of metric conversions—Appendix B.
tt Henegar, 1975.
* See Working Paper No. 175, "...Survey Methods, 1973-1976",
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4
IV. LAKE WATER QUALITY SUMMARY
Spiritwood Lake was sampled three times during the open-water
season of 1974 by means of a pontoon-equipped Huey helicopter. Each
time, samples for physical and chemical parameters were collected
from a number of depths at two stations on the lake (see map, page
v). During each visit, a single depth-integrated (4.6 m to surface)
sample was composited from the stations for phytoplankton identification
and enumeration; and during the April and September visits, an 18.9-
liter 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
12.2 meters at station 1 and 10.7 meters at station 2.
The sampling results are presented in full in Appendix C and are
summarized in the following table.
-------
PARAMETER
TEMP (C)
DISS OXY U2 1.1
3RD SAMPLING ( 9/17/74)
2 SITES
RANGE
14o8 - 15.7
8.0 - 9.6
2313. - 2369.
MEAN MEDIAN
15.1 15.0
8.9
2333.
8.9 " 8.9
500. - 730.
9.1
2329.
8.9
6l8o
lol
8.9
624.
0.103 - 0.141 0.116 0.110
0.039 - 0.056 0.046 0.046
0.020 = 0.030 0.024 0.020
Oo200 - 0.280 0.246 0.250
2.100 - 2o700 2.490 2.500
0.220 - 0.300 0.270 0.270
2.120 - 2.730 2.514 2.525
15.6 - 15.8 15.7 15.7
2oO - 2.0 2»0 2.0
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B. Biological Characteristics:
1. Phytoplankton -
Sampl i ng
Date
04/26/74
07/17/74
09/17/74
Dominant
Genera
1.
2.
3.
4.
5.
1.
2.
3.
1.
2.
3.
4.
5.
Chlamydomonas sp.
Melosira sp.
Chroomonas SJK
Dactylococcopsis sp.
Flagellates
Other genera
Total
Apham'zomenon sp.
Microcystis sp.
Lyngbya sp.
Total
Chroomonas sp.
Stephanodiscus sp.
Cryptomonas sp.
Aphanizomenon sp.
Microcystis sp.
Algal Units
per ml
3,738
1,869
353
176
176
670
6,982
10,245
162
40
10,447
376
226
150
113
75
2. Chlorophyll a_ -
Sampling
Date
04/26/74
07/17/74
09/17/74
Total 940
Station
Number
1
2
1
2
1
2
Chlorophyll a_
(ug/D
12.4
2.5
77.4
84.3
15.8
15.6
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C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked -
a. April sample -
Spike (mg/1)
Control
0.050 P
0.050 P + 1.0 N
1.0 N
b. September sample -
Ortho P
Cone, (mg/1)
Inorganic N Maximum yield
Cone, (mg/1) (mg/1-dry wt.)
0.095
0.145
0.145
0.095
0.598
0.598
1.598
1.598
15.9
15.4
36.3
31.4
Spike (mg/1)
Control
0.050 P
0.050 P + 1.0
1.0 N
Ortho P
Cone, (mg/1)
0.055
0.105
0.105
0.055
Inorganic N Maximum yield
Cone, (mg/1) (mg/1-dry wt.)
0.292
0.292
1.292
1.292
9.8
9.6
32.2
23.5
2. Discussion -
The control yields of the assay alga, Selenastrum capri-
cornutum, indicate that the potential primary productivity
of Spiritwood Lake was high at the times the samples were
taken (04/26/74 and 09/17/74). Also, the lack of growth
response in both samples with the addition of phosphorus
until nitrogen was also added indicates that the lake
was limited by nitrogen at those times. Note that in both
samples, the addition of nitrogen alone resulted in a yield
significantly greater than that of the control.
The lake data indicate nitrogen limitation as well. The
mean inorganic nitrogen/orthophosphorus ratios were 7/1 or
less at both stations and all sampling times, and nitrogen
limitation would be expected.
-------
8
V. LITERATURE REVIEWED
Henegar, Dale, 1975. Personal communication (lake morphometry).
ND Game & Fish Dept., Bismarck.
Peterson, Norman L., 1974. Personal communication (information on
Spiritwood Lake). ND Dept. of Health, Bismarck.
, 1975. Personal communication (North Dakota
State lake classification). ND Dept. of Health, Bismarck.
Vollenweider, R. A., and P. J. Dillon, 1974. The application of
the phosphorus loading concept to eutrophication research.
Natl. Res. Council of Canada Publ. No. 13690, Canada Centre
for Inland Waters, Burlington, Ontario.
-------
VI. APPENDICES
APPENDIX A
LAKE RANKINGS
-------
LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
3HOI LAKE ASHTABULA
3802 LAKE AUDUHON
3RD 3 BRUSH LAKE
3804 LAKE DARLING
3805 »DEVILS LAKE
3806 JAMESTOWN RESERVOIR
3807 LAKE LA MOURE
3808 MATEJCEK LAKE
3809 LAKE METIGOSHE
3811 PELICAN LAKE
3812 LAKE SAKAKAWEA (GARRISON
3813 SPIRIT WOOD LAKE
3414 SWEET BRIAR RESERVOIR
3815 WHITMAN LAKE
MEDIAN
TOTAL P
0.260
0.067
0.066
0.274
0.630
0.144
0.438
0.228
0.032
0.034
0.016
0*156
6.092
0.260
MEDIAN
INORG N
0.160
0.223
0.095
0.250
0.140
0.365
0.380
0.440
0.080
0.070
0.150
0.290
0.090
0.260
500-
MEAN SEC
472.250
446.222
44V. 143
466.750
449.333
438.667
421.400
475.167
389.167
36*. 500
408.733
417.833
440.800
478.333
MEAN
CHLORA
40.892
11.322
29.114
60.075
38. 508
19.400
19.720
2.683
10.367
10.950
6.883
34.667
39.000
27.067
15-
MIN DO
10.600
11.000
9.000
11.600
14.600
8.800
15.000
14.400
9.000
12.800
10.800
15.000
8.800
9.200
MEDIAN
DISS OHTMO
Ool70
0.015
0.010
0.180
0.469
0.07H
0.290
0.179
V
0.010
I
0.006
0.007
0.082
0.031
0.185
-------
PERCENT OF LAKES WITH HIGHER VALUES (NUMBER OF LAKES WITH HIGHEK VALUES)
LAKE
CODE LAKt NAME
3801 LAKE ASHTABULA
3802 LAKE AuDllriON
3803 BRUSH LAKE
380<» LAKE 0AWL ING
3B05 DEVILS LAKE
3806 JAMESTOWN RESEHVOIR
3807 LAKE LA MOUHE
3808 MATEJCEK LAKE
3809 LAKE METIGOSHE
3811 PELICAN LAKE
3812 LAKE SAKAKAVIEA (GARRISON
381J SPIRIT WOOD LAKE
381* SWEET HRIAR RESEHVOIR
3815 WHITMAN LAKE
MEDIAN
TOTAL P
27 (
69 I
77 (
15 (
0 (
54 (
8 (
38 (
92 (
85 I
100 1
46 (
62 (
27 (
3)
9)
10)
2>
0)
7)
1>
5)
12)
11)
13)
6)
8)
3)
MEDIAN
INORG N
54 <
46 (
77 (
38 <
69 1
15 (
8 <
0 1
92 (
100 I
62 1
23 I
85 1
31 i
7)
6)
10)
1 5)
: 9>
: 2)
: i>
i 0)
! 12)
I 13)
I 8)
1 3)
I 11)
I 4)
500-
MEAN SEC
15 (
46 (
38 (
23 1
31 (
62 (
69 <
8 1
92 1
100 (
85 I
77 1
54 1
0 i
2)
b)
5)
1 3)
: 4>
: a)
! 9)
i n
I 12)
: 13)
[ ID
; io>
I 7)
I 0)
MEAN
CHLORA
8 (
69 (
38 (
0 <
23 1
62 <
54 (
100 (
85 1
77 1
92 1
31 1
15 1
46 i
1>
9)
5)
: o)
; 3)
: a)
; 7)
i 13)
( in
! 10)
! 12)
1 4)
! 2)
[ 6)
15-
MIN 00
62 (
46 <
81 (
38 (
15 (
96 (
4 (
23 (
81 (
31 (
54 (
4 (
96 (
69 (
8)
6)
10)
5)
2)
12)
0)
3)
10)
4)
7)
0)
12)
9)
MEDIAN
OISS ORTHO P
36 (
69 (
81 (
23 (
0 (
54 (
8 (
31 <
81 (
100 (
92 (
46 (
62 (
15 (
5)
9)
10)
3)
0)
7)
1)
4)
10)
13)
12)
6)
8)
2)
INDEX
NO
204
345
392
137
138
343
151
200
523
493
485
227
374
188
-------
LAKES RANKED BY INDEX, NOS.
HANK LAKE CODE LAKE NAME INDEX NO
1 3ri09 LAKE MtTIoOShE 523
2 3rill PELICAN LAKL 493
3 3812 LAKE SAKAKAaEA (GARRISON 485
4 3803 BRUSH LAKE 39?
5 3814 SWEET UHIAR WESEKVOIh 374
6 3803 LAKE AUOUBON 345
7 3806 JAMESTOWN RESERVOIR 343
8 3B13 SPIRIT »/000 LAKE 227
9 3801 LAKE ASHTABULA 204
10 3808 MATEJCEK LAKE 200
11 3815 WHITMAN LAKE 188
12 3807 LAKE LA MOURE 151
13 3805 DEVILS LAKE 138
14 3804 LAKE DARLING 137
-------
APPENDIX B
CONVERSION FACTORS
-------
CONVERSION FACTORS
Hectares x 2.471 = acres
Kilometers x 0.6214 = miles
Meters x 3.281 = feet
-4
Cubic meters x 8.107 x 10 = acre/feet
Square kilometers x 0.3861 = square miles
Cubic meters/sec x 35.315 = cubic feet/sec
Centimeters x 0.3937 = inches
Kilograms x 2.205 = pounds
Kilograms/square kilometer x 5.711 = Ibs/square mile
-------
APPENDIX C
TRIBUTARY FLOW DATA
-------
TRIBUTARY FLOW INFORMATION FOR NORTH DAKOTA
03/16/7&
LAKE CODE 3813
SP1RITWOOO LAKE
TOTAL DRAINAGE AREA OF LAKtfSQ KM)
42.0
SUB-DRAINAGE
TRIBUTARY AREAtSJ KM)
JAM
Fee
MAR
APR
3813A2
3813B1
3813ZZ
42.0
28.7
13.2
0.0
0.0
0.0
0.0
0.0
0.0
0.028 0.113
0.028 0.113
0.008 0.028
MAY
0.057
0.057
0.017
NORMALISED FLOWS(CMS)
JUN JUL AUG
0.023
0.025
0.008
0.011
0.017
O.OOb
0.003
0.006
0.003
SEP
0.0
0.003
0.0
OCT
0.0
0.003
0.0
NOV
0.0
0.003
0.0
DEC
0.0
0.003
0.0
MEAN
0.020
0.021
0.006
TOTAL DRAINAGE AREA OF LAKE =
SUM OF SJB-DRAINAGE AREAS =
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAH MEAN FLOW OAY
3813A2
3813B1
3813ZZ
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
74
74
74
74
75
75
75
75
75
75
75
75
74
74
74
74
75
75
75
75
75
75
75
75
74
74
74
74
75
75
75
75
75
75
75
75
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
c.o
0.0
0.0
0.0
0.0
0.0
0.176
0.001
0.133
0.150
0.034
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.051
0.0
0.040
0.045
0.011
21
20
16
22
18
22
22
5
3
22
19
22
21
20
16
22
18
22
22
5
3
22
19
22
SUMMARY
42.0
42.0
TOTAL FLOW IN
TOTAL FLOW OUT
0.33
0.24
18
FLOW DAY
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.099
0.023
FLOW DAY
FLOW
0.0
20
0.566
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STORET RETRIEVAL DATE 76/03/16
381301
47 04 35.0 098 35 42.0 3
SPIRIT HOOD LAKE
38093 NORTH DAKOTA
11EPALES 2111202
0040 FEET DEPTH CLASS 00
DATE
FROM
TO
74/04/26
74/07/17
74/09/17
DATE
FROM
TO
74/04/26
74/07/17
74/09/17
TIME
OF
DAY
DEPTH
FEET
14 50 0000
14 50 0005
14 50 0020
14 50 0037
13 20 0000
13 20 0005
13 20 0015
13 20 0025
13 20 0037
11 05 0000
11 05 0010
11 05 0015
11 05 0020
11 05 0030
11 05 0040
TIME
OF
DAY
14 50
14 50
14 50
14 50
13 20
13 20
13 20
13 20
13 ?0
13 20
11 05
11 05
11 05
11 05
11 05
11 05
DEPTH
FEET
0000
0005
0020
0037
0000
0005
0009
0015
0025
0037
0000
0010
0015
0020
0030
0040
00010
WATER
TEMP
CENT
5.8
5.8
5.6
3.7
24.6
24.6
23.9
16.9
11.2
15.4
15.3
15.1
14.9
14.9
14.8
00665
PHOS-TOT
MG/L P
0.184
0.175
0.171
0.185
0.191
0.137
0.157
0.217
0.414
0.107
0.103
0.112
0.107
0.117
0.130
00300 00077 00094
DO TRANSP CNDUCTVY
SECCHI FIELD
MG/L INCHES M1CROMHO
108 .
10.2
10.6
8.2
10.6 48
10.2
9.2
2.2
C.O
9.4 78
9.6
9.2
9.0
8.8
8.2
32217 00031
CHLRPHYL INCOT LT
A REMNING
UG/L PERCENT
12.4
77.4
1.0
15.8
1725
1723
1716
1723
2861
2850
2824
2382
2130
2343
2341
2333
2325
2319
2313
00400 00410
PH T ALK
CAC03
SU MG/L
8.60
8.60
8.60
8.55
8.9Q
9.00
8.90
8.70
8.60
8.87
8.89
8.89
8.89
8.89
8.89
332
328
322
376
335
375
255
355
325
500
730
600
575
650
700
00610
NH3-N
TOTAL
.MG/L
0.360
0.400
0.400
0.540
0.050
0.040
0.060
0.330
1.000
0.220
0.240
0.250
0.240
0.250
0.270
00625 00630 00671
TOT KJEL N02&N03 PHOS-DIS
N N-TOTAL ORTHO
MG/L MG/L MG/L P
2.200
2.200
2.300
2.500
2.300
2.200
2.300
2.200
3.000
2.700
2.400
2.500
2.400
2.500
2.600
0.220
0.180
0.180
0.200
0.050
0.030
0.050
0.140
0.110
0.030
0.020
0.020
0.030
0.030
0.030
0.077
0.087
0.089
0.121
0.062
0.091
0.094
0.173
0.356
0.039
0.042
0.046
0.047
0.051
0.056
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STORET RETRIEVAL DATE 76/03/16
36U02
47 04 33.0 098 34 40.0 3
SPIRIT WOOD LAKE
4&057 NORTH DAKOTA
DATE
FROM
TO
74/04/26
74/07/17
74/09/17
00010
TIME DEPTH WATER
OF TEMP
DAY FEET
15
15
15
15
13
13
13
13
13
11
11
11
11
15
15
15
15
50
50
50
50
50
40
40
40
40
0000
0005
0025
0032
0000
0005
0015
0025
0035
0000
0005
0015
0025
CENT
3.8
3.8
3.7
3.1
24.9
24.8
24.4
18.0
11.5
15.7
15.2
14.9
14.8
HEP ALES
211
0037 FEET DEPTH CLASS
00300
DO
MG/L
7.0
6.4
5.4
11.0
11.4
10.2
1.6
0.0
9.6
9.2
6.2
8.0
00077
TKANSP
StCCHI
INCHES
144
37
78
00094
CNDUCTVY
FIELD
MICROMHO
1748
1746
1746
1766
2877
2877
2898
2508
2138
2369
2339
2325
2319
00400
PH
su
8.60
8.55
8.55
8.50
9.00
9.00
8.90
8.80
8.60
8.89
8.89
8.89
8.89
00410
T ALK
CAC03
MG/L
346
324
374
376
320
390
400
300
402
665
595
590
635
00610
NH3-N
TOTAL
MG/L
0.580
0.580
0.580
0.680
0.050
0.040
0.200
0.330
1.020
0.200
0.250
0.260
0.280
1202
00
00625
TOT KJEL
N
MG/L
2.600
2.500
2.600
2.700
2.800
2.500
2.500
2.300
3.000
2.600
2.100
2.500
2.600
00630 00671
N02&N03 PHOS-DIS
N-TOTAL ORTHO
MG/L MG/L P
0.200
0.190
0.180
0.180
0.040
0.050
0.060
0.120
0.110
0.020
0.020K
0.020
0.020
0.131
0.129
0.130
0.153
0.059
0.068
0.109
0.159
0.318
0.039
0.044
0.046
0.050
DATE
FROM
TO
74/04/26
74/07/17
74/09/17
00665 32217 00031
TIME DEPTH PHOS-TOT CHLRPHYL INCDT LT
OF A WEMN1NG
DAY FEET
15
15
15
15
13
13
13
13
13
13
11
11
11
11
15
15
15
15
50
50
50
50
50
50
40
40
40
40
0000
0005
0025
0032
0000
0005
0006
0015
0025
0035
0000
0005
0015
0025
MG/L P UG/L PERCENT
0,
0,
0,
0.
0,
0,
0,
0.
0.
0,
0,
0,
0,
.177 2.5
.182
.180
,208
.140 84.3
.133
1.0
.155
.203
.355
.109 15.6
.104
.129
.141
K VALUE KNOWN TO bE
LESS THAN INDICATED
-------
APPENDIX E
TRIBUTARY DATA
-------
bTORET RETRIEVAL DATE 76/03/18
00630 00625 00610
DATE TIME DEPTH N02&N03 TOT KJEL NH3-N
FROM OF N-TOTAL N TOTAL
TO DAY FEET MG/L MG/L MG/L
3813A1
47 04 00.0 098 36 03.0 4
SEVENMILt COULEE
38 7.5 SPIRITwOU LK
T/SPIRIUOOD LAKE
«ROG ON FAS RO 654 4 MI NE OF FRIED
llct-ALES 2111204
0000 FEET DEPTH CLASS 00
00671 00665
PHOS-DIS PHOS-TOT
ORTHO
MG/L P MG/L P
75/06/22 09 30
0.010
1.750
0.090
0.210
0.270
------- |