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

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                                         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

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                                   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

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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 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.

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                                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

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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'	

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                                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

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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

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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

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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




   
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    APPENDIX B





CONVERSION FACTORS

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                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

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    APPENDIX C
TRIBUTARY FLOW DATA

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                                    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

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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

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