U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
SWAN LAKE
LAKE COUNTY
MONTANA
EPA REGION VI11
WORKING PAPER No,
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
-------
REPORT
ON
SWAN LAKE
LAICCOMY
MONTANA
EPA REGION VIII
WORKING PAPER No, 800
WITH THE COOPERATION OF THE
MONTANA DEPARTMENT OF HEALTH & EIWIRONMENTAL SCIENCES
AND THE
MONTANA NATIONAL GUARD
MAY, 1977
-------
CONTENTS
Page
Foreword ii
List of Montana Lakes and Reservoirs iv
Lake and Drainage Area Map v
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 3
III. Lake Water Quality Summary 4
IV. Nutrient Loadings 8
V. Literature Reviewed 12
VI. Appendices 13
-------
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 v/as 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 [5303(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.
-------
Ill
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.
ACKNOWLEDGEMENT
The staff of the National Eutrophication Survey (Office of
Research & Development, U.S. Environmental Protection Agency)
express sincere appreciation to the Montana Department of Health
and Environmental Sciences for professional involvement, to the
Montana National Guard for conducting the tributary sampling
phase of the Survey, and to those Montana wastewater treatment
plant operators who voluntarily provided effluent samples.
The staff of the Water Quality Bureau 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 John J. Womack, the Adjutant General of Montana^
and Project Officer Major William Yeager, who directed the volun-
teer efforts of the Montana National Guardsmen, are also gratefully
acknowledged for their assistance to the Survey.
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IV
LAKE NAME
Canyon Ferry
Clark Canyon
Flathead
Georgetown
Hebgen
Koocanusa
Mary Ronan
McDonald
Nelson
Seeley
Swan
Tally
Tiber
Tongue River
Whitefish
Yellowtail
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES AND RESERVOIRS
STATE OF MONTANA
COUNTY
Broadwater, Lewis and Clark
Beaverhead
Flathead, Lake
Deer Lodge, Granite
Gallatin
Lincoln, MT; British Columbia, Can.
Lake
Flathead
Phillips
Missoula
Lake
Flathead
Liberty, Toole
Big Horn
Flathead
Carbon, Bighorn, MT; Bighorn, WY
-------
Swan
SWAN LAKE
® Tributary Sampling Site
X Lake Sampling Site
O Drainage Area Boundary
5 10 15 20 Kin.
i i i
Scale
10 Mi.
4 7'30'
-------
SWAN LAKE
STORE! NO. 3011
I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate Swan Lake is mesotrophic. It ranked
fifth in overall trophic quality when the 15 Montana lakes and
reservoirs sampled in 1975 were compared using a combination of
six parameters*. Three of the water bodies had less median total
phosphorus, two had less and three had the same median ortho-
phosphorus, five had less and three had the same median inorganic
nitrogen, eight had less mean chlorophyll a^, and two had greater
mean Secchi disc transparency. No significant depression of dis-
solved oxygen occurred at depths as great as 25.9 meters.
Survey limnologists observed emergent macrophytes in the north
and south ends of the lake near stream confluences.
B. Rate-Limiting Nutrient:
Because of significant nutrient changes in the samples during
shipment from the field to the laboratory, the algal assay results
are not considered representative of conditions in the lake at the
times the samples were taken.
The lake data indicate nitrogen limitation in June and phos-
phorus limitation in July and September.
C. Nutrient Controllability:
1. Point sources—No known wastewater treatment plants impacted
* See Appendix A.
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2
Swan Lake during the sampling year. Septic tanks serving lake-
shore dwellings and a campground added an estimated 0.3% of the
total phosphorus load to the lake, but a shoreline survey is
needed to determine the actual significance of those sources.
The present phosphorus loading of 1.56 g/m2/yr is within the
range proposed by Vollenweider (Vollenweider and Dillon, 1974)
as a mesotrophic loading (see page 11). Because of this, all
phosphorus inputs to Swan Lake should be minimized to the greatest
practicable extent to maintain the present trophic quality of the
lake.
2. Non-point sources--Non-point sources, including direct
precipitation, accounted for 99.7% of the total phosphorus load to
Swan Lake during the sampling year. The Swan River contributed
85.7% of the total load; Johnson Creek, 0.3%; Bond Creek, 1.0%
Hall Creek, 0.6%; and the ungaged tributaries added an estimated
11.0% of the total.
The phosphorus export rates of the Swan River, Johnson Creek,
Bond Creek, and Hall Creek were 10, 2, 9, and 9 kg/km2/yr, respec-
tively (see page 10). Except for Johnson Creek, these export
rates are somewhat higher than those of the tributaries of
nearby Flathead Lake* (mean of about 4 kg/km2/yr).
* See Working Paper No. 792.
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II. LAKE AND DRAINAGE BASIN CHARACTERISTICS1"
A. Morphometry :
1. Surface area: 10.85 kilometers2.
2. Mean depth: 21.9 meters.
3. Maximum depth: 40.2 meters.
4. Volume: 237.615 x 106 m3.
5. Mean hydraulic retention time: 85 days (based on outflow).
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Drainage Mean flow
Name area (km2)* (mVsec)*
Swan River 1,416.7 32.310
Johnson Creek 31.3 0.183
Bond Creek 19.6 0.477
Hall Creek 12.1 0.358
Minor tributaries &
immediate drainage - 247.3 1.010
Totals 1,727.0 34.338
2. Outlet -
Swan River 1,737.9** 32.390
C. Precipitation***:
1. Year of sampling: 51.4 centimeters.
2. Mean annual: 57.8 centimeters.
t Table of metric conversions—Appendix B.
tt Horpestad, 1975.
* For limits of accuracy, see Working Paper No. 175, "...Survey Methods,
1973-1976".
** Includes area of lake.
*** See Working Paper No. 175.
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4
III. WATER QUALITY SUMMARY
Swan Lake was sampled three times during the open-water season
of 1975 by means of a pontoon-equipped Huey helicopter. Each time,
samples for physical and chemical parameters were collected from
three stations on the lake and from a number of depths at each station
(see map, page v). During each visit, a single depth-integrated
(4.6 m to surface) sample was composited from the stations for phyto-
plankton identification and enumeration; and during the first and
last visits, a single 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 ^analysis. The
maximum depths sampled were 17.1 meters at station 1, 18.6 meters
at station 2, and 25.9 meters at station 3.
The sampling results are presented in full in Appendix D and
are summarized in the following table.
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PARAMETER
TE*P (C)
DISS OXY (MG/L)
CNDCTVY (MCSOMO)
PH (STAND UNITS)
TOT ALK (MG/L)
TOT P (MG/L)
ORTHO P (MG/L)
N02*N03 (MG/L)
AMMONIA (MG/L)
KJEL N (MG/L)
INORG N (MG/L)
TOTAL N (MG/L)
CHLRPYL A (UG/D
SECCHI (METERS)
A. SUMMARY Of PHYSICAL AND
1ST SAMPLING ( 6/ 2/75)
3 SITES
RANGE MtAN MEDIAN
4.3 - 11.5 8.7 9.5
9.2 - 10.0 9.7 9.8
114. - 130. 124. 124.
7.8 - 8.2 8.1 8.1
59. - 96. 88. 90.
0.008 - 0.021 0.011 0.010
0.004 - 0.012 0.009 0.010
0.020 - 0.060 0.041 0.040
0.020 - 0.030 0.021 0.020
0.200 - 0.500 0.275 0.300
0.040 - 0.090 0.061 0.060
0.230 - 0.520 0.316 U.335
1.0 - 1.7 1.3 1.3
2.3 - 3.7 3.0 3.0
CHEMICAL CHARACTERISTICS FOR S-iAN LAKE
STO^ET CODE 3011
2ND SAMPLING ( 7/28/75)
3 SITES
RANGE
3.9 - 18.2
5.4 - 9.0
104. - 130.
7.6 - 8.3
68. - 94.
0.005 - 0.02V
0.003 - 0.008
0.020 - 0.100
0.020 - 0.030
0.200 - 0.200
0.040 - 0.120
0.2?0 - 0.300
1.0 - 1.5
5.5 - 5.B
MEAN
12.9
8.1
118.
8.0
77.
0.010
0.004
0.034
O.o21
0.200
0.054
0.234
1.3
5.6
MEDIAN
14.7
8.2
119.
8.1
75.
O.OOB
0.004
0.020
0.020
0.200
0.040
0.220
1.4
5.5
330 SAMPLING ( 9/ 5/75)
3 SITES
RANOE MEAN MEt)lAN
7.8 - 15.9 13.8 15.1
6.0 - 9.2, 8.1 6.6
119. - 147. 130. 129.
7.1 - 8.4 8.0 8.1
32. - 92. 86. «5.
O.OOb - 0.976 0.013 0.010
0.002 - 0.006 0.002 0.002
0.020 - 0.080 0.027 C.0<^0
0.020 - 0.020 0.020 0.020
0.200 - C.300 0.207 O.irOO
0.0<»0 - 0.100 0.047 0.040
0.220 - 0.320 0.233 0.220
1.8 - la.O 7.2 i.9
6.7 - 7.6 7.1 ?.l
-------
B. Biological Characteristics:
1. Phytoplankton -
Sampling
Date
06/02/75
07/28/75
09/05/75
2. Chlorophyll
Sampli ng
Date
06/02/75
07/28/75
09/05/75
Dominant
Genera
1. Pi nobryon sp.
2. Gymnodinium isp_.
3. Cryptomonas sp.
4. Asterionella sp.
5. Melosira sp.
Other genera
Total
1. Asterionella sp.
2. Chroomonas sp.
Total
1. Chroomonas sp.
2. Cryptomonas sp.
3. Asterionella sp.
4. Cyclotella sp.
Total
Station
Number
1
2
3
1
2
3
1
2
3
Algal Units
per ml
545
95
47
47
47
72
853
290
290
580
238
119
119
40
516
Chlorophyll
(ug/D
1.3
1.0
1.7
1.0
1.5
1.4
1.9
18.0
1.8
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7
C. Limiting Nutrient Study:
Because of significant nutrient changes in the samples during
shipment from the field to the laboratory, the algal assay
results are not considered representative of conditions in the
lake at the times the samples were taken (06/02/75 and 09/05/75).
The lake data indicate nitrogen limitation in June and phos-
phorus limitation in July and September. At those times, the mean
inorganic nitrogen to orthophosphorus ratios were 7 to 1, 14 to 1,
and 24 to 1, respectively.
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8
IV. NUTRIENT LOADINGS
(See Appendix E for data)
For the determination of nutrient loadings, the Montana National
Guard collected monthly near-surface grab samples from each of the
tributary sites indicated on the map (page v), except for the high
runoff month of June when two samples were collected. Sampling was
begun in October, 1974, and was completed in September, 1975.
Through an interagency agreement, stream flow estimates for the
year of sampling and a "normalized" or average year were provided by
the Montana 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 loads for unsampled
"minor tributaries and immediate drainage" ("ZZ" of U.S.G.S.) were esti-
mated using the means of the nutrient loads, in kg/km Vyear, at stations
A-2, B-l, D-l, and F-l and multiplying the means by the ZZ area in km2.
No known wastewater treatment plants impacted Swan Lake during the
samp!ing year.
A. Waste Sources:
1. Known municipal - None
2. Known industrial - None
* See Working Paper No. 175.
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9
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
kg P/ % of
Source yr total
a. Tributaries (non-point load) -
Swan River 14,535 85.7
Johnson Creek 55 0.3
Bond Creek 170 1.0
Hall Creek 105 0.6
b. Minor tributaries & immediate
drainage (non-point load) - 1,855 11.0
c. Known municipal STP's - None
d. Septic tanks* - 55 0.3
e. Known industrial - None
f. Direct precipitation** - 190 1.1
Total 16,965 100.0
2. Outputs -
Lake outlet - Swan River 9,885
3. Net annual P accumulation - 7,080 kg.
* Estimate based on 180 dwellings and one campground; see Working Paper No. 175.
** See Working Paper No. 175.
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10
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
kg N/ % of
Source yr total
a. Tributaries (non-point load) -
Swan River 637,945 82.8
Johnson Creek 3,270 0.4
Bond Creek 9,630 1.3
Hall Creek 6,720 0.9
b. Minor tributaries & immediate
drainage (non-point load) - 98,920 12.8
c. Known municipal STP's - None
d. Septic tanks* - 1,990 0.3
e. Known industrial - None
f. Direct precipitation** - 11,715 1.5
Total 770,190 100.0
2. Outputs -
Lake outlet - Swan River 894,800
3. Net annual N loss - 124,610 kg.
D. Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km 2/yr kg N/km2/yr
Swan River 10 450
Johnson Creek 2 104
Bond Creek 9 491
Hall Creek 9 555
* Estimate based on 180 dwellings and one campground; see Working Paper No. 175.
** See Working Paper No. 175.
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11
E. Mean Nutrient Concentrations in Ungaged Streams:
Mean Total P Mean Total N
Tributary Cone, (mg/1) Cone, (mg/1)
Sixmile Creek 0.015 0.780
Groom Creek 0.017 0.795
F. Yearly Loads:
In the following table, the existing phosphorus loadings
are compared to those proposed by Vollenweider (Vollenweider
and Dillon, 1974). Essentially, his "dangerous" loading is
one at which the receiving water would become eutrophic or
remain eutrophic; his "permissible" loading is that which
would result in the receiving water remaining oligotrophic
or becoming oligotrophic if morphometry permitted. A meso-
trophic loading would be considered one between "dangerous"
and "permissible".
Note that Vollenweider's model may not be applicable to
water bodies with short hydraulic retention times.
Total Phosphorus Total Nitrogen
Total Accumulated Total Accumulated
grams/m2/yr 1.56 0.65 70.99 loss*
Vollenweider phosphorus loadings
(g/m2/yr) based on mean depth and mean
hydraulic retention time of Swan Lake:
"Dangerous" (eutrophic loading) 1.84
"Permissible" (oligotrophic loading) 0.92
* There was an apparent loss of nitrogen during the sampling year. This
may have been due to nitrogen fixation in the lake, solubilization of
previously sedimented nitrogen, recharge with nitrogen-rich ground water,
unknown and unsampled point sources discharging directly to the lake, or
underestimation of the septic tank nitrogen loads. Whatever the cause,
a similar nitrogen loss has occurred at Shagawa Lake, Minnesota, which has
been intensively studied by EPA's former National Eutrophication and Lake
Restoration Branch (Malueg et al., 1975).
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12
V. LITERATURE REVIEWED
Horpestad, Abe, 1975. Personal communication (lake morphometry).
MT Dept. of Health & Env. Sci., Helena.
Malueg, Kenneth W., D. Phillips Larsen, Donald W. Schults, and
Howard T. Mercier; 1975. A six-year water, phosphorus, and
nitrogen budget for Shagawa Lake, Minnesota. Jour. Environ.
Qual., vol. 4, no. 2, pp. 236-242.
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.
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13
VI. APPENDICES
APPENDIX A
LAKE RANKINGS
-------
LAKE OAT A TO BE USED IN SANMNGS
LA
-------
=>E3CENT OF '-4KES *«ITri nIGHSS VALUES (NUMBER OF LAKES «ITri nIOnE
LA
13)
7)
6)
10)
5)
14)
1)
8)
12)
9)
2)
0)
11)
MEAN
CrlLO&A
21 (
6<» (
93 <
1+ (
36 <
57 (
29 <
100 <
7 (
71 (
43 (
79 (
5C (
0 (
86 (
3)
<*>
U>
2)
b)
8)
4)
14)
1)
10)
6)
11)
7)
0)
12)
15-
MIN 0
0 <
36 (
36 (
57 (
14 (
5C (
7 (
100 (
43 (
29 (
68 (
79 (
68 (
21 (
93 (
0
0)
5>
12)
6)
2)
7)
1)
14)
6)
4)
9)
ID
9)
3)
13)
MEDIAN
OISS ORTriO »-•
7 t
1^ (
75 i
29 (
21 (
0 (
57 (
100 (
50 (
36 <
Ti (
75 (
75 (
43 (
93 (
1)
2)
•*)
0)
3)
0)
8)
1«>
7)
5)
9)
9)
9)
6)
13)
INOtX
NO
?7
171
<•*/
268
232
22te
275
504
172
353
39?
429
268
110
519
-------
LftKES RANKED BY INDEX NO 3*
RANK LAKE CODE LAKE NAME INDEX NO
1 3016 WHITEFISH LAKE 519
2 300ri HC OONALD LAKE 50*
3 3003 FLATHEAD LAKE
-------
APPENDIX B
CONVERSION FACTORS
-------
CONVERSION FACTORS
Hectares x 2.471 = acres
Kilometers x 0.6214 = miles
Meters x 3.281 = feet
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
-------
T-~
93.16
93.45
0.028
1 .27<*
0.793
2.55
JUL
4-3.02
45.31
0.283
0.425
0.453
1.13
AUG Sti->
19.00 lf.r.9
lei. 97 15.01
0.566 0.566
0.170 0.142
0.340 0.142
O.D7 0.42
OCT
15.80
15.86
0.283
0.170
0.113
0.42
NUV
16.57
15.86
0.113
0.170
0.099
0.34
OtC
16.14
16.14
0.085
0.142
0.085
0.28
MEAN
32.39
32.31
O.lh3
0.477
0.35H
1.01
SUMMARY
TOTAL
SUM OF
DRAINAGE
AREA OF
LAKE =
SU6-DQAINAGE AREAS =
1737.9
1757. «+
TOTAL FLOW IN =
TOTAL FLOW OUT =
411.
388.
32
00
MEAN MONTHLY FLOWS AND GAILY FLOwS(CMS)
TRIBUTARY MONTH
3011A1
YEAR
FLOV DAY
FLOW DAY
KLOW DAY
FLOW
3011«2
10
11
12
1
?
3
4
5
6
7
8
9
1
?
3
ft
5
10
11
12
6
7
3
9
74
74
74
75
75
75
75
75
75
75
75
75
74
74
74
74
74
74
74
74
75
75
75
75
14.3S5
14. 1C?
12.4;.3
13.281
12.035
12.261
21.039
64.619
122.867
73.879
25.57C
19.709
15.291
14.725
14.725
25.03?
76.455
18.406
17.556
15.291
101.091
58.333
21.236
18.123
5
3
7
4
1
2
5
5
1?
6
4
1
2
5
3
7
5
12
6
15.857
12.743
12.176
11.610
12.743
11.893
10.732
143.566
22.653
23.786
13.875
13.592
14.7?5
19.822
15.857
15.574
127. 4?6
22.087
21.238
16
16
11.893
144.416
C.O
127.426
-------
T9i3UTAftr FLO* INFORMATION FOR MONTANA
08/05/7«r
LA
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STOSET Rfc'TKlEVAL DA7F 76/03/05
301101
48 00 20.0 113 57 36.0 3
SWAN' LAKE
30059 MONTANA
1302V1
11EPALES 3111202
0060 FEET DEPTH CLASS 00
DATE
FRO*
TO
75/06/0?
75/07/P8
75/09/05
DATE
FROM
TO
75/06/02
75/07/28
75/09/05
TIME DEPTH
OF
OAY FEET
15 20 0000
15 20 0005
15 ?0 0025
15 20 0040
15 ?0 0056
10 ?0 0000
1U 20 0005
10 20 0025
10 20 0035
10 20 0055
If 50 0000
1* 50 0005
14 50 0020
14 50 0033
14 50 0047
TIME DEPTH
OF
DAY FEET
15 20 0000
15 20 0005
15 20 0025
15 20 0040
15 20 0056
10 20 0000
10 ?0 0005
10 20 0025
10 ?0 0035
10 20 0055
14 50 0000
14 50 0005
14 50 0020
14 50 0033
14 50 0047
00010
rfATER
TEMP
CENT
10. H
10.4
10.2
9.2
5.9
17.2
17.1
16.5
11.7
7.3
15. rt
15.3
15.2
15.1
11.2
00665
PHOS-TOT
MG/L P
0.021
0.009
0.009
O.OOti
0.013
0.006
0.005
0.005
0.007
0.01 1
0.010
0.011
0.01 1
0.009
0.041
00300
DO
1G/L
9.
9.
10.
9.
9.
a.
P.
8.
8.
5.
9.
8.
8.
9.
6.
00077
TRANSP
SECCHI
INCHES
8 144
8
0
2
e
4 21ft
2
0
4
4
0 280
8
6
0
2
00094
CNOUCTVY
FIELD
MICWOMHO
130
129
126
124
124
123
122
124
112
112
130
129
129
129
119
00400
PH
SU
8.20
8.15
8.05
7.90
8.20
8.25
8.2i:
8.00
7.90
7.60
8.15
8.15
8.10
8.10
7.80
00410
T ALK
CAC03
MG/L
59
89
91
96
90
74
75
75
77
88
83
85
84
85
*7
00610
NH3-N
TOTAL
MG/L
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
G.020K
0.020K
0.020
0.020
0.020K
C.020K
0.020K
0.020K
0.020K
00625
TOT KJEL
N
MG/L
0.500
0.300
0.300
0.300
0.200
0.200K
0.200K
0.200K
0.200K
0.200
0.200K
0.200
0.200K
0.200K
0.300
OOoJO
N02&N03
N-TOTAL
MG/L
0.020K
0.030
0.030
0.050
0.040
0.020K
0.02UK
0.020K
0.030
0.100
0.020K
0.020K
0.020K
0.020K
0.020K
00671
PHOS-DIS
ORTHO
MG/L P
0.012
O.Ollr.
O.Ollh
O.Ollr,
0.005
0.004
0.004
0.004
0.003
0.008
0.002K
0.004
0.002r
0.002C-
0.003
32217 00031
CHLRPHYL INCDT LT
A
UG/L
1.
1.
1.
REMNING
PERCENT
3
0
9
K VALUE KMOWN TU 6E
LESS THAN
-------
QRdT RETRIEVAL DATE 76/08/05
JO 1102
47. 5« 03.0 113 5t 33.0 3
SrtAN LAKE
30029 MONTANA
130291
11EPALES 3111202
0062 FEET DEPTH CLASS 00
DATE
FROM
Tu
75/06/0?
75/07/2B
75/09/05
DATE
FROM
TO
75/06/0?
75/07/28
75/09/05
TIME DEPTH
OF
DAY FEET
15 50 0000
15 50 0005
15 50 0015
15 50 0040
15 50 0058
09 SO 0000
09 50 OOC5
09 50 0020
09 50 0030
09 50 0051
14 25 0000
14 ?5 0005
14 25 0025
14 25 0033
14 25 0061
TIME DEPTH
OF
DAY FEET
15 50 0000
15 50 0005
15 50 0015
15 50 0040
15 50 0058
09 50 0000
09 50 0005
09 50 0020
09 50 0030
09 50 0051
14 ?5 COOO
14 25 0005
14 ?5 0025
14 ?5 0033
14 ?5 0061
OC010
WATER
TEMP
CENT
11.1
10.7
9.9
fa.l
5.9
16.3
16.2
16.1
12.3
6.8
15.7
15.5
14.8
14.7
10.7
00665
PHOS-TOT
MG/L o
0.009
0.010
0.010
d.OOh
0.01C
0.006
L.007
o.ooa
0.007
0.009
0.009
0.011
0.010
0.01C
G.028
00300 00077
00
HG/L
9.
9.
10.
9.
9.
rt.
8.
8.
R.
8.
7.
7.
9.
8.
7.
32217
TRANSP
SECCH1
INCHES
8 90
8
0
4
6
2 216
4
4
2
2
4 300
4
0
8
0
00031
00094
CNDUCTVY
FIELO
MICROMHO
127
127
123
123
122
122
123
123
113
116
133
133
131
129
121
00400
Ph
SU
8.20
8.20
8.00
7.90
8.10
8. 20
8.25
8.20
7.90
8.20
8.00
8.10
8.1:i
8.10
7.80
00410
T ALK
CAC03
MG/L
87
86
93
95
86
74
74
74
75
77
82
34
84
84
87
00610
NH3-N
TOTAL
MG/L
0.020K
0.020
0.020
0.030
0.020K
0.020
0.020K
0.020
0.020K
0.020K
0.020K
0.020K
U.020K
0.020K
U.020K
00625
TOT KJEL
N
MG/L
0.200
0.300
0.300
0.300
0.200
0.200*
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
00630
N02&N03
N-TOTAL
MG/L
0.030
0.040
0.040
0.060
0.040
0.020
0.020K
0.020K
0.030
0.020
0.020*
0.020K
0.020K
0.020K
0.040
00671
ORTrlO
MG/L P
0.004
0.004
0.010J
0.006
0.010J
0.003
U.004
0.003
0.003
O.OOt
0.002K
0.002K
0.002K
0.002K
0.002K
CHLRPHYL INCDT LT
A
JG/L
i.
i.
IS.
REMNING
PERCENT
0
5
0
j»
TO
KNO^N TO rtc I •; FR-?nq
-------
RETPilCVAl. DATE 76/08/05
301103
47 55 20.0 113 51
SrfA.NI LAKE
30029 MONTANA
23.0 3
1302*1
11EPALES
2111202
OOB4 FEET DEPTH CLASS
DATE
FROM
TO
75/06/02
75/07/28
75/09/05
DATE
FROM
TO
75/06/02
75/07/2d
75/09/05
TIMF DEPTH
OF
DAY FEET
16 15 0000
16 15 0005
16 15 0015
16 15 0035
16 15 0050
16 15 0080
09 15 OOCO
09 15 0005
09 15 0020
09 IS 0035
09 15 0060
09 15 0085
14 05 0000
14 05 0005
14 05 0032
14 05 0050
14 05 0072
TIME DEPTH
OF
DAY FEET
16 15 0000
16 15 0005
16 15 001S
16 15 0035
16 15 0050
16 15 0080
09 15 0000
09 15 0005
09 IS 0020
09 15 0035
09 15 0060
09 15 0035
14 05 0000
14 05 0005
14 05 0032
14 05 0050
14 05 0072
00010
\»ATER
TEMP
CEMT
11.5
11.1
8.6
6.7
5.6
4.3
18.2
17.3
13.3
10.5
6.2
3.S
15.9
15.6
13.4
10.7
7.8
00665
PHOS-TOT
MG/L P
0.010
O.OU6
0.010
0.010
0.016
0.010
0.013
O.OOs
0.012
0.01<>
0.029
0.012
0.007
0.007
0.006
0.007
0.041
00300 00077
DO TRANSP
SECCHI
MG/L INCHcS
10.0
9.8
9.6
9.8
9.2
4.H
8.0 22?
8.8
9.0
8.2
8.4
7.6
9.0 264
8.8
9.2
7.6
6.0
32217 00031
CHLRPHYL INCDT LT
A REMNING
UG/L PERCENT
1.7
1.4
1.8
00094
CNDUCTVY
FIELD
MICtfOMHO
130
128
122
115
114
120
130
130
114
106
104
115
134
133
125
129
147
00400
Ph
SU
8.10
8.10
8.00
7.9C
7.8C
8.10
8.20
8.20
8.10
7.80
7.75
7.65
8.40
• 8.2C
8.00
7.8C
7.10
00410
T ALK
CAC03
MG/L
86
39
91
92
96
d7
81
71
70
68
80
94
92
92
91
87
85
OOtolO
NH3-N
TOTAL
Mb/L
0.020K
0.020
0.020*
0.020
0.020K
0.020
0.020
0.030
0.020
0.020
0.020
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00
00625
TOT KJEL
N
MG/L
0.300
0.300
0.200
0.200K
0.200
0.300
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200
00630
N02&N03
N-TOTAL
MG/L
0.040
O.OtO
0.050
0.050
0.050
0.040
0.020K
0.020
0.020K
0.040
0.06C
0.080
0.020K
0.020K
0.020K
0.040
0.080
00671
PnOS-DIS
CRT HO
MG/L P
0.012K
0.011K
0.011K
0.005
0.012J
0.004
0.004
0.003
0.003
0.004
0.004
0.005
0.002K
0.002K
0.002K
0.002K
0.006
•<* VULUF KNOWN TO
I\'DICiT£0
E KNOwM TO
-------
APPENDIX E
TRIBUTARY DATA
-------
STOkrlT NETP.IEvAi. 04T£ 76/08/05
43 02 00.0 113 56 30.0 4
30 7.5 CRATER LAKE
0/SwAN LAKE 1302-il
ScC «u b^DG .7 Ml * uF JCT w FAS Hi»Y 209
11EPALES 21112C4
OOOC FEcT Ot^TM CLASS 00
DATE TIME DEPTH
FROM OF
TO DAY FEET
74/15/05
74/1 1/03
74/13/07
75/01/04
75/02/01
75/03/0^
75/03/lo
75/04/05
75/06/05
75/06/07
75/08/12
18
10
14
11
11
11
11
14
09
10
14
15
40
="5
30
30
30
00
30
30
40
30
00
30
00630
N02&N03
N-TOTAL
MG/L
0.016
0.003
0 . 0 0 r
0.016
0.032
0.040
0.03^
0.035
0.02b
0.030
C.005
0.005
006?5
TOT KJFL
N
MG/L
0.150
0.400
0.100K
1.200
1.700
0.550
0.800
2.400
0.250
1.700
0.550
0.400
00610
NH3-N
TOTAL
MG/L
f>.005K
0.020
0.01J
O.OC5
C.016
0.016
C.024
0.040
C.005K
0.020
0.025
0.010
00671
PHOS-OIS
OPTMO
MG/L P
O.OC5K
0.005K
0.005K
0.005K
o.ooaK
0.008K
O.OC6K
0.005K
0.005K
0.005K
0.005
0.005K
00665
PhOS-TOT
MG/L P
0.010K
0.010K
0.010K
0.010K
C.010K
0.010K
0.010*
0.010K
0.010K
0.010K
0.010K
0.0 10K
K VALUE KNOrfN TO BE
LESS THAU INDICATED
-------
373RET RETRIEVAL DATE ('c/06/05
DATE TIME OEpTH N03SN03
FROM OF
TO UAY FEET
74/10/05 16 15
7<*/l 1/03
74/13/07
11
00
30
75/01/04 15 00
75/03/01 14 30
75/03/0? 15 00
75/06/05 12 00
75/06/07 14 30
75/08/12 16 00
75/09/06 14 45
301142
47 55 30.0 113 52 = 2.0 u
SWAN riivts
30 7.5 Yt* C*E£*
T/SwAN LA*E 130391
bNK <..! Ml iM* OF JCT «UTH FAS hniY 309
11EPAI-ES 3111204
0000 FEET DtPTh CLASS UO
0630
'SN03
OTAL
iG/L
0.024
0.024
0.04d
0.056
0.064
0.048
0.050
0.055
0.020
0.025
00625
TOT KJEL
N
Hfi/L
o.no
0.100
0.100K
1.100
1.3CO
0.650
0.450
0.700
0.550
0.600
00610
Nr!3-N
TOTAL
M-5/L
0.005K
0.015
0.010
0.005
0.024
0.024
0.005K
C.01C
0.030
0.005K
00671
PhOS-OIS
ORTHO
MG/L P
0.005K
0.005*
O.OOSK
0.005K
0.00 8K
O.OOSK
0.005K
0.005K
O.OOS
0.005K
00665
PHOS-TOT
MG/L P
0.01QK
0.010K
0.010K
0.010K
0.010K
0.010K
0.020
0.020
0.010
0.020
K VALUE MNOWN TO 8E
LESS THAN INDICATED
-------
STGRET RETRIEVAL 'JATE 76/CB/05
•»8 01 17.0 113 58 40.0 4
JOHNSON C^EtK
30 7.5 CRATER LAKE
T/SwA* LAKE 130291
6*DG 1.3 MI N* OF JCT wITH FAS HrfY 209
HEPALES 211120^
0000 FEET OtPTH CLASS 00
DATE
FROM
TO
74/10/05
74/11/03
74/12/07
75/01/04
75/03/02
75/03/16
75/04/05
75/06/05
75/06/07
75/08/12
75/09/06
00630 00625
TIME OEPTM :-J02:>N03 TOT KJEL
OF N-TuTAL N
OA1
IB
11
14
12
11
12
1<*
10
10
14
15
< FEET
10
10
00
00
30
00
45
OC
40
30
45
Mu/L MG/L
0
0
0
\f
0
0
J
0
G
0
G
.012
.GO*
.Oud
.016
.032
.024
.010
.015
.020
.010
.010
0.
0.
0.
1.
0.
2.
0.
0.
0.
0.
0.
200
100K
100K
100
550
000
800
550
4QO
075
250
00610 00671 00665
NH3-N PHOS-OIS PHOS-TOT
TOTAL ORTHO
MO/L
0.
0.
0.
0.
0.
0.
•>.
0.
0.
c.
0.
005K
015
010
005
024
016
015
005K
005
012
005K
MG/L
0.
0.
0.
0.
0.
0.
G.
0.
0.
0.
0.
a
005
005
005K
OOSK
00°K
006K
005K
005
005
032
005
KG/L P
O.U10K
0.010K
0.010K
0.010K
0.010
0.010
0.010
0.010
0.010
0.032
0.010K
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
RETRIEVAL OATE 76/08/05
3011C1
47 59 20.0 113 55 22.0 4
SIXMILE CHEEK
30 7.5 YEVi CREEK
LAKE
OATE
FKUM
TO
74/10/05
74/1 1/03
74/12/07
75/01/04
75/03/02
75/03/16
75/04/05
75/06/05
75/06/07
75/08/12
75/09/06
TIME OEfTri
OF
UAY FEET
18 10
12 00
13 30
12 30
12 ftO
13 00
15 50
10 15
11 30
15 00
12 15
00630
N02SN03
N-TOTAL
MG/L
0.004
0.008
0.008
C.024
0.024
o.ooe
0.010
0.010
0.015
0.020
0.025
00625
TOT KJEL
N
MG/L
0.100K
0.100K
0.100K
1.600
1.050
0.650
1.750
0.950
0.675
1.100
0.350
. 00610
NH3-N
TOTAL
MG/L
0.005
C.010
0.010
0.010
0.016
n . o 1 6
0.035
0.005K
0.005K
0.020
0.015
00671
PHOS-DIS
ORTHO
MG/L P
0.005
0.005
0.005K
0.005
0.008K
0.008K
0.005
0.005
0.010
0.035
0.005
FAS nor 20
11EPALES
OOOC FEET
00605
PHOS-TOT
MG/L t3
O.Clu
0.010K
0.010K
0.010K
0.020
3.010
0.010K
0.010
0.010
0.050
0.010K
130291
6 MI Nw OF T*N S*AN LK
2111204
DEPTH CLASS 00
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
ET RETRIEVAL DATE
301101
47 55 16.0 113 49 59.0 4
BONO C^EEK
30 7.5 S*AN LAKE
T/S*AN LAKE
UNMPRVO «D XING .3 M E JCT * FAS HWY 209
11EPALES 211120^
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
74X10/05
74/11/03
74/12/07
75/01/04
75/04/05
75/06/05
75/06/07
75/08/12
75/09/06
TIME DEPTrl
OF
DAY FEET
17 no
13 30
12 00
It 00
15 10
11 30
12 20
16 CO
15 00
00*30
N02&.N03
N-TOTAL
MG/L
0.012
0.032
0.05b
0.080
0.070
0.165
0.170
0.050
0.055
00625
TOT KJEL
N
MG/L
0.200
0.100K.
0.100K
1.100
1.2SO
1.000
0.100
0.150
0.550
00610
NH3-N
TOTAL
MG/L
0.005K
0.015
0.060
0.005K
C.020
0.005K
C.005K
C.015
0.020
00671
PHOS-OIS
ORTHO
MG/L f>
0.005K
0.005K
O.OOSK
0.005K
O.OOSK
O.OOSK
O.OOSK
0.030
O.OOSK
00665
''HOS-TOT
MG/L i3
0.010*
0.010K
0.010K
0.010K
0.010K
0.010K
0.01UK
0.030
0.010K
K VALUE KNOWN TO tIE
LESS THAN INDICATED
-------
STORF.T RETRIEVAL DATE 76/08/05
00630
DATE TIMP DEPTH N02&N03
F^OM OF N-TOTAL
TO OAV FFET MG/L
75/06/OS 11 15
75/06/07 12 10
75/08/12 15 30
0.2dO
O.?«0
0.065
00635
TOT KJEL
N
MG/L
0.850
C.850
0.050K
00610
NHJ-N
TOTAL
3011E1
7 56 00.0
113 50 37.0
30 7.i S«ON LA^E
T/SwA.N LAH.E 130291
SEC ^J XING JUST N OF TO«,N OF SWAN LAKE
11EPALES 2111204
0000 FEET OE^Tri CLASS 00
0.005^
0.005K
O.OC5K
OC671
PriOS-OIS
ORTrlO
MG/L P
0.005K
0.005K
0.030
00665
PHOS-TOT
MG/L P
0.01 OK
0.010K
0.030
K VALUE KNOWN TO BE
LESS TnAN INDICATED
-------
RETRIEVAL DATE 76/06/05
DATE TIME OEpTH N026.N03
FROM OF
TO DAY FFET
74/10/05
7<»/ll/03
74/12/07
75/01/04
75/03/02
75/03/16
75/06/05
75/06/07
75/08/12
75/09/06
17 30
12 30
13 00
13 00
14 00
U 30
11 00
12 00
15 00
13 15
3011F1
47 56 17.0 113 50 35.0 4
HALL C»EEK
30 7.5 SHAN LAKE
T/SWAN LAKE
JNMPrtVO RO XING .7 M E
HEPALES
0000 FEtT
130291
JCT 4 FAS HWY 209
211120^
CLASS 00
0630
6.N03
OTAL
IG/L
0.016
C.016
0.032
0.048
0.072
0.06<»
0.085
0.10C
0.040
O.OtS
006?5
TOT KJEL
N
MG/L
0.300
0.10-OK
0.100
1.600
0.950
0.200
0.500
1.050
0.050K
0.550
00610
NH3-N
TOTAL
MG/L
0.005*
0.010
0.010
0.005
0.024
0.008
0.005K
0.318
0.005
5.025
00671
PHOS-DIS
ORTHO
MG/L P
0.005K
0.005K
0.005K
0.005K
0.008K
0.008K
0.005K
0.005K
0.030
0.005i^
00665
PhOS-TOT
MG/L ?
0.010K
0.010K
0.010K
0.010K
0.010K
0.010K
0.010K
0.010K
0.030
C.010K
K VALUE KNOWN TO BE
LESS THAN INDICATED
------- |