U.S. ENVIRONMENTAL PROTECTION AGENCY
           NATIONAL EUTROPHICATION SURVEY
                    WORKING PAPER SERIES
                                        REPORT
                                          ON
                                     MARY RONAN LAKE
                                      LAKE (Dim
                                        IDNTANA
                                     EPA REGION VI11
                                  WORKING PAPER No, 796
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
                            and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA


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                                          REPORT
                                            ON
                                     MARY RONAN LAKE
                                       LAKE COUNTY
                                         MDNIANA
                                     EPA REGION VI11
                                  WORKING PAPER No, 796
             WITH THE COOPERATION OF THE
MONTANA DEPARTMENT OF HEALTH & ENVIRONMENTAL SCIENCES
                       AND THE
                MONTANA NATIONAL GUARD
                      MAY, 1977

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                                   CONTENTS
                                                               Page
  Foreword                                                      i i
  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                                         9
  V.   Literature Reviewed                                        13
 VI.   Appendices                                    •            14

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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 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 [S314(a,b)']>
and water quality monitoring [5106 and S305(b)] activities mandated
by the Federal  Water Pollution Control  Act Amendments of 1972.

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                                m
     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. K'omack, 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
llebgen
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
Gal latin
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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11430
                                   11425
                                                                       I
                                                                      114"20
                                                                     4800-
                                                                      4755-
        Mont.
   Map Location
MARY ROMAN  LAKE

 ®  Tributary Sampling  Site
 X  Lake Sampling Site
 X»  Drainage Area Boundary
o            21/2            5 Km.
                                                            3 Mi
                                            Scale
                                                                      4750-

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                             MARY RONAN LAKE
                             STORE! NO. 3007

I.  CONCLUSIONS
    A.  Trophic Condition:
            Survey data indicate that Mary Ronan Lake is meso-eutrophic.
        It ranked seventh in overall trophic quality when the 15 Montana
        lakes and reservoirs sampled in 1975 were compared using a com-
        bination of six lake parameters*.   Seven of the water bodies had
        less median total phosphorus, none had less and four had the same
        median inorganic nitrogen, six had less median dissolved ortho-
        phosphorus, ten had less mean chlorophyll a^ and nine had greater
        mean Secchi disc transparency.  Marked depression of dissolved
        oxygen with depth occurred at station 1 in September.
            Survey limnologists reported the occurrence of macrophytes
        at station 1 and observed surface concentrations of algae in
        October.
    B.  Rate-Limiting Nutrient:
            Due to significant nutrient changes in the algal assay samples
        during shipment from the field to the laboratory, the results are
        not considered representative of conditions in the lake at the
        times of sampling.
            The lake data indicate nitrogen limitation all four sampling
        times.
* See Appendix A.

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                                 2
C.   Nutrient Controllability:
        1.   Point sources—No known municipal  or industrial  waste-
    water treatment plants impacted the lake during the sampling
    year.   Septic tanks serving lakeshore dwellings were estimated
    to have contributed 1.3% of the total phosphorus load,  but a
    shoreline survey would be necessary to determine the actual  sig-
    nificance of those sources.
        The present phosphorus loading of 0.18 g/m2/yr is a  little
    more than that proposed by Vollenweider (Vollenweider and  Dillon,
    1974)  as a eutrophic loading (see page 12).
        2.   Non-point sources--Non-point sources,  including  direct
    precipitation, accounted for 98.7% of the total  phosphorus load to
    the lake during the sampling year.   Freeland Creek contributed
    29.9% of the total  load; Donaldson Creek,  27.7%; and the ungaged
    tributaries added an estimated 31.3% of the total.
        The phosphorus export rates of Freeland and Donaldson  creeks
    were 11 and 54 kg/km2/yr, respectively (see page 11).   The cause
    of the much higher rate of Donaldson Creek is  not known, but it
    may have resulted from insufficient sampling.

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II.   LAKE AND DRAINAGE BASIN CHARACTERISTICS1"

     A.   Morphometry  :

         1.   Surface area:   6.15 kilometers2.

         2.   Mean depth:   8.5 meters.

         3.   Maximum depth:   14.3 meters.

         4.   Volume:  52.275 x 106  m3.

         5.   Mean hydraulic  retention  time:   17.4  years  (based  on  outflow).

     B.   Tributary and Outlet:
         (See Appendix C  for flow data)

         1.   Tributaries  -

                                               Drainage       Mean flow
             Name                              area  (km2)*     (m3/sec)*

             Freeland Creek                        31.8            0.060
             Donaldson Creek                        5.7            0.046
             Minor tributaries &
              immediate drainage -                 33.1            0.004

                            Totals                 70.6            0.110

         2.   Outlet -

             Ronan Creek                           76.8**         0.095

     C.   Precipitation***:

         1.   Year of sampling:  51.4 centimeters.

         2.   Mean annual:  59.0 centimeters.
 t Table of metric conversions—Appendix  B.
 ft Surface area  determined  by planimetry; mean  depth  from  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
      Mary Ronan Lake was sampled four 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 in June,  July,  and September (two
  stations in October) 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,  third
  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  a_
  analysis.  The maximum depths sampled were 11.0 meters at station
  1,  11.6 meters at station 2, and 7.6 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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                             A. SUMMARY OF PHYSICAL AND
PARAMETER
TEMP (O
OISS OXY  (MG/L)
CNDCTVY  (MCROMO)
PH  (STAND UNITS)
TOT ALK  (MG/L)
TOT ?  (MG/L)
ORTHO  P  (MG/L)
N02»N03  (MG/D
AMMONIA  (MG/L)
KJEL N (MG/L)
INORG  N  (MG/L)
TOTAL  N  (MG/L)
CHLRPYL  A  (Ur,/L)
SECCHI  (METERS)
       1ST SAMPLING ( 6/
             3 SITES
                                               2/75)
     RANGE
  6.8  -  13.3
  5.6  -  10.4
  86.  -  111.
  7.5  -   B.4
  56.  -   84.
0.01B  - 0.029
0.005  - 0.018
0.020  - 0.020
0.020  - 0.040
0.400  - 0.60C
0.040  - 0.060
0.420  - 0.620
  5.0  -   5.7
  3.4  -   3.4
CHEMICAL CHARACTERISTICS FOR MARY RONAN LAKE
 STORET CODE 3007
           2ND SAMPLING ( 7/28/75)
                 3 SITES
3*0 SAMPLING  (
      3 SITES
5/75)
MEAN
10.4
9.3
95.
8.1
74.
0.023
0.012
0.020
0.024
0.523
0.044
0.543
5.4
3.4
MEDIAN
10.4
10.0
94.
8.1
82.
0.022
0.013
0.02u
0.020
0.500
0.040
0.520
5.5
3.4
RANGE
8.8 - 20.4
2.0 - 9.6
90.
7.5
59.
0.006
0.003
0.020
0.020
0.300
0.040
0.320
3.2
3.8
- 125.
8.8
67.
- 0.021
- 0.013
- 0.020
- 0.050
- 0.700
- 0.070
- 0.720
4.7
6.5
MEAN
17.2
7.1
111.
8.5
62.
0.014
0.005
0.020
0.028
0.582
0.048
0.602
3.7
5.5
MEDIAN
19.8
7.9
113.
8.8
61.
0.012
0.004
0.020
0.030
0.600
0.050
0.620
3.2
6.1
RANGE
13.3 - 17.1
0.3 - 9.0
103.
7.8
64.
0.015
0.002
0.020
0.020
0.300
0.040
0.320
0.9
1.5
- 123.
8.8
69.
- 0.090
- 0.014
- 0.020
- 0.020
- 0.900
- 0.040
- 0.9.^0
1.1
2.3
MEAN
16.1
7.6
108.
8.5
67.
0.030
0.004
0.020
0.020
0.425
0.040
0.445
1.0
1.8
MEDIAN
16.3
8.7
107.
8.7
67.
0.01S*
0.003
0.020
0.020
0.350
0.0^0
0.370
1.0
1.5

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                             A. SUMMARY OF PHYSICAL AND CHEMICAL CHARACTERISTICS FOK  MARY  RONAN LAKE
                                                         ST03ET CODE 3007
                             4Th SAMPLING (10/22/75)
PARAMETER
TE'-IP (C)
DISS OXY (MG/L)
CNDCTVY (MCROMOJ
PH (STAND UNITS)
TOT ALK (MG/L)
TOT ° (MG/L)
ORTHO P (MG/L)
N02»N03 (MG/L)
AMMOMIA (MG/L)
KJEL N  (MG/L)
INORG N (MG/L)
TOTAL N (MG/L)
CHLR^YL A (UO/D
SECCHI  (METERS)
? SITES
RANGE MEAN
10.9
7.2
102.
7.3
69.
0.03e
0.006
0.020
0.080
0.400
0.100
C.420
4.9
2.1
- 11. u
7.9
- 114.
7.6
71.
- 0.079
- 0.012
- 0.020
- 0.090
- 1.000
- 0.110
- 1.020
- 16.2
2.1
11. C
7.5
105.
7.4
70.
0.054
0.003
0.020
0.082
0.587
0.102
0.607
10.5
2.1
MEDIAN
11.0
7.5
103.
7.4
70.
0.054
0.008
0.020
0.080
0.550
0.100
0.570
10.5
2.1

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B.  Biological Characteristics:

    1.   Phytoplankton -
        Sampling
        Date

        06/02/75
        07/28/75
        09/05/75
        10/22/75
Dominant
Genera

1.  Dinobryon sp.
2.  Cryptomonas sp.
3.  Microcystis sp.
4.  Aphanizomenon sp.
5.  Fragilaria sp.
    Other genera

            Total
1.
2.
3.
4.
5.
Aphanizomenon sp.
Crucigenia sp.
Cryptomonas sp.
Chroomonas sp.
Anabaena sp.
Other genera

        Total

Chroomonas sp.
Aphanothece sp.
Anabaena sp.
Cryptomonas sp.
Aphanizomenon sp.
Other genera

        Total
1.  Aphanizomenon sp.
2.  Cryptomonas sp.
3.  Microcystis sp.
4.  Chroomonas sp.
5.  Fragilaria sp.
    Other genera
1.
2.
3.
4.
5.
                       Algal Units
                       per ml	

                         2,787
                           190
                           127
                            95
                            95
                           126
3,420

  245
  163
  163
  163
   82
  124

  940

  373
  217
  155
  155
   93
	32

1,025

  851
  675
  294
  264
  175
  441
                                          Total
                             2,700

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    2.   Chlorophyll  a -

        Sampling              Station                    Chlorophyll  a^
        Date                  Number                     (pg/1)	

        06/02/75                 1                             5.0
                                 2                             5.5
                                 3                             5.7

        07/28/75                 1                             3.2
                                 2                             4.7
                                 3                             3.2

        09/05/75                 1                             1.1   .
                                 2                             0.9
                                 3                             1.0

        10/22/75                 1                             4.9
                                 2
                                 3                            16.2

C.   Limiting Nutrient Study:

        Due to significant changes  in nutrients in the algal  assay

    samples during shipment from the field to the laboratory,  the

    results are not considered representative of conditions in the

    lake at the time of sampling.

        The lake data indicate nitrogen limitation at all  sampling

    times.   The mean inorganic nitrogen to orthophosphorus ratios

    were 4  to 1 in June,  10 to 1 in July and September,  and

    13  to 1 in October; and nitrogen limitation would be expected.

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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" ("IT1 of  U.S.G.S.) were esti-
 mated using the nutrient loads at station B-l, in  kg/km2/year,  and
 multiplying by the II area in  km2.
     No known wastewater treatment plants impacted  Mary  Ronan Lake during
 the sampling year.
     A.  Waste Sources:
         1.  Known municipal  -  None
         2.  Known industrial - None
 * See Working Paper No.  175.

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                                     10
    B.  Annual Total Phosphorus Loading - Average Year:
        1.   Inputs -
                                              kg P/          % of
            Source                            yr             total
            a.  Tributaries (non-point load) -
                Freeland Creek                    335         29.9
                Donaldson Creek                   310         27.7
            b.  Minor tributaries & immediate
                 drainage (non-point load) -      350         31.3
            c.  Known municipal STP's - None
            d.  Septic tanks* -                    15          1.3
            e.  Known industrial  - None
            f.  Direct precipitation** -          110          9.8
                        Total                    1,120        100.0
        2.  Outputs -
            Lake outlet - Ronan Creek             490
        3.  Net annual P accumulation - 630 kg.
* Estimate based on 50 lakeshore dwellings;  see Working Paper No.  175.
** See Working Paper No.  175.

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                                     11
    C.  Annual Total Nitrogen Loading -  Average Year:
        1.   Inputs -
                                              kg N/          % of
            Source                            yjr	          total
            a.  Tributaries (non-point load) -
                Freeland Creek                  2,665          15.3
                Donaldson Creek                 4,760          27.4
            b.  Minor tributaries & immediate
                 drainage (non-point load)  -    2,775          16.0
            c.  Known municipal STP's -  None
            d.  Septic tanks* -                   535           3.1
            e.  Known industrial - None
            f.  Direct precipitation** -        6.640          38.2
                        Total                   17,375         100.0
        2.   Outputs -
            Lake outlet - Ronan Creek           8,520
        3.   Net annual N accumulation -  8,855 kg.
    D.  Mean Annual Non-point Nutrient Export by Subdrainage Area:
        Tributary                             kg P/km2/yr    kg N/km2/yr
        Freeland Creek                            11              84
        Donaldson Creek                           54              835
* Estimate based on 50 lakeshore dwellings;  see Working Paper No.  175.
** See Working Paper No. 175.

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                                 12
E.   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              0.18      0.10        2.8        1.4
    Vollenweider phosphorus  loadings
     (g/m*/yr)  based  on  mean depth  and  mean
     hydraulic  retention time of Mary Ronan  Lake:
        "Dangerous"   (eutrophic  loading)               0.14
        "Permissible"  (oligotrophic loading)          0.07

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                                     13

V.   LITERATURE REVIEWED

    Horpestad, Abe,  1975.   Personal  communication (lake morphometry).
        MT Dept.  of Health & Env.  Sci., Helena.

    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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                                14
VI.  APPENDICES
                                  APPENDIX A
                                 LAKE RANKINGS

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LA
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        OF LAKES WITH iIGHES VALJES  (NUMBER OF LAKES  »IT« HIC-^E?
LAKE
COOE  La
14)
4)
9)
11)
10)
8)
0)
12)
MC.IJI A*
INO=G
14 <
21 <
61 <
79 (
79 (
29 (
96 (
4 (
36 (
96 (
46 <
61 (
4 (
46 (
79 (
4
N
2)
3)
8)
10)
10)
4)
13)
0)
5)
13)
6)
8)
0)
6)
10)
50 c- ME
MEAN SEC CHL
21 '
39 (
93 (
50 (
43 <
71 (
36 (
100 <
7 (
57 (
86 (
64 (
14 (
0 (
79 (
3)
4)
13)
7)
6)
10)
5)
14)
1)
8)
12)
9)
2)
0>
11)
21
64
93
1^
36
57
29
100
7
71
43
79
50
0
86
;AN
.0* A
( 3)
( 9)
( 13)
( 2)
( b>
< 8)
( 4)
( 14)
( 1)
( 10)
( 6)
( 11)
( 7)
( 0)
( 12)
15-
MIN 00
0 (
36 (
86 (
57 (
14 (
50 (
7 (
100 (
43 (
29 (
68 (
79 (
68 (
21 (
93 (
0)
5)
12)
a>
2)
7)
D
14)
6)
4)
9)
11)
9)
3)
13)
M£ul AN
01 SS OriTnO >-•
1 I
14 (
75 I
29 (
21 (
0 (
57 (
100 (
50 (
36 (
75 (
75 (
75 (
43 (
93 (
1)
2)
-*>
4)
3)
0)
8)
!«*)
7)
5)
9)
9)
9)
6)
13)
INOt
NO
77
171
4*7
268
232
22b
275
504
172
353
397
429
268
110
519

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LAKES RANKED 3V INOEx NOS.




RANK  LAKE CODE  LAKE NAME                INDEX.  NO






   1  3016       *HITEFISH 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
  4
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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                                   TRIBUTARY  FLOW  INFORMATION  FOR  MONTANA
                                                                        08/16/76
LA

TRIBUTARY  MONTH   YEAR     MEAN FLOW  DAY

3007A1
3007B1
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
74
74
74
75
75
75
75
75
75
75
75
75
74
74
74
75
75
75
75
75
75
75
75
75
0.006
0.003
0.0
0.0
0.0
0.003
0.028
0.156
0.283
0.269
0.241
0.008
0.003
0.003
0.003
0.0
0.0
0.003
0.014
0.340
0.085
0.057
0.028
0.006
5
2
7





5
12
20
6
5
2
7





5
12
20
5
                                FLOW  DAY

                               0.006
                               0.006
                               0.003
                               0.425   10
                               0.283
                               0.283
                               0.003
                               0.003
                               0.003
                               0.014
                                                  0.113    10
                                                  0.057
                                                  0.028
                                                  0.003
                           FLOW  DAY
                                     FLOW
                                                                    0.425
                                                 0.085

-------
TRIBUTARY FLOW INFORMATION FOR MONTANA
                      08/16/76
LAKE CODE 3007     MARY RONAN LAKE

     MEiN MONTHLY FLOWS AND DAILY FLOWS(CMS)

TRIBUTARY   MONTH   YEAR    MEAN FLOW  DAY

3007C1
10
11
12
1
2
3
4
5
6
7
8
9
74
74
74
75
75
75
75
75
75
75
75
75
0.006
0.003
0.0
0.0
0.0
0.0
0.014
0.255
0.057
0.037
0.028
0.014
5
2
7
4
1

6

5

20
6
                FLOW  DAY

               0.006
               0.006
               0.142
               0.0
               0.0

               0.0

               0.028   10

               0.028
               0.014
 FLOW  DAY
FLOW
0.028

-------
        APPENDIX D





PHYSICAL and CHEMICAL DATA

-------
STO^ET RETRIEVAL DATE 76/03/05
00010
DATE
FROM
TO
75/06/02




75/07/28


75/09/05



7S/10/22



TIME
OF
DAY
14
14
14
14
14
11
11
11
12
12
12
12
16
16
16
16


00
00
00
00
00
40
40
40
50
50
50
50
00
00
00
00
DEPTH

FEET
0000
0005
0015
0025
0036
0000
0005
0029
0000
0005
0025
0031
0000
0005
0015
0032
WATER
TEMP
CENT
13
13
10
10
7
20
20
10
17
16
15
13
11
11
11
10



.3
.2
.7
.1
.0
.4
.2
.0
.1
.6
.8
.3
.0
.0
.0
.9
                                                                  300701
                                                                47 56  15.0  114  23 45.0  3
                                                                MARY RONAN  LAKE
                                                                30047   MONTANA
                                                                                          130391
                                                                 11EPALES              2111202
                                                                 0040  FEET  DEPTM  CLASS  00
00300
00

MG/L
10.0
1C. 4
10.4
10.4
7.0
8.2
9.0

8.8
8.8
7.4
0.8
7.8
7.4
7.3
7.2
00077
TKANSP
SECCHI
INCHES
132




254


90



84



00094
CNDUCTVY
FIELD
MICROMHO
100
98
93
90
111
112
119
90
109
107
105
123
113
103
103
114
00400
PH

SU
8.10
8.05
8.10
8.05
8.20
8.80
8. 80
7.70
8.60
8.70
8.30
7.80
7.30
7.35
7.40
7.40
00410
T ALK
CAC03
MG/L
83
82
82
84
83
61
62
63
68
68
64
68
70
71
71
69
00610
NH3-N
TOTAL
MG/L
0.020
0.020
0.020
0.020
0.020K
0.030
0.030
0.030
0.020K
0.020K
0.020K
0.020
0.080
0.080
0.080
0.090
00625
TOT KJEL
N
MG/L
0.500
0.500
0.600
0.500
0.600
0.600
0.700
0.300
0.300
0.300
0.400
0.900
0.400
0.400
0.400
0.800
                                                                                                      00630      00671
                                                                                                    N02&N03    PHOS-uIS
                                                                                                    N-TOTAL     ORTHO
                                                                                                      MG/L      MG/L  P
                                                                                                       0.020K
                                                                                                       0.020K
                                                                                                       0.020K
                                                                                                       0.020K
                                                                                                       0.020K
                                                                                                       0.020K
                                                                                                       0.020K
                                                                                                       0.020K
                                                                                                       0.020K
                                                                                                       0.020K
                                                                                                       0.020K
                                                                                                       0.020K
                                                                                                       0.020K
                                                                                                       0.020K
                                                                                                       0.020K
                                                                                                       0.020K
0.013
0.013
0.006
0.005
0.012
O.OOb
0.004
0.004
0.004
0.004
0.003
0.014
0.003
0.009
0.008
0.008
DATE
FROM
TO
75/06/0?




75/07/28


75/09/05



75/10/2?



00665 32217 00031
TIME DEPTH PHOS-TOT CHLRPHYL INCOT LT
OF A REMNING
DAY FEET
14
14
14
14
14
11
11
11
12
12
12
12
16
16
16
16
00
00
00
00
00
40
40
40
50
50
50
50
00
00
00
00
0000
0005
0015
0025
0036
0000
0005
0029
0000
0005
0025
0031
0000
0005
0'015
0032
MG/L P
0
0
0
u
0
0
0
0
0
0
0
0
0
c
c
0
.019
.0?.3
.022
.021
.029
.012
.011
.018
.022
.017
.044
.090
.038
.042
.039
.058
UG/L PERCENT
5.0




3.2


1.1



4.9



           K VALUE KiiOWN TO BE
           LESS THAN INDICATED

-------
STOSET RETRIEVAL DATE  76/08/05
                                                                   300702
                                                                  47  55  23.0  114  24  52.0  3
                                                                  MARY KONAN  LAKE
                                                                  30047   MONTANA
                                                                                            130391
                                                                   11EP-1LES              21112C2
                                                                   00-2  FEET   DEPTH   CLASS  00
DATE
FSOM
TO
75/06/02



75/07/23



75/09/05




DATE
FROM
TO
75/06/02



75/07/28



75/09/05



TIME DEPTH
OF
OAY FEET
14 30 0000
14 30 0005
14 30 0018
14 30 0038
11 20 0000
11 20 0005
11 20 0020
11 20 0034
13 15 0000
13 15 0005
13 IS 0018
13 15 0030

TIME DEPTH
OF
DAY FEET
14 30 0000
14 30 0005
14 30 0018
14 30 0038
11 ?0 0000
11 20 0005
11 ?0 0020
11 20 0034
13 15 0000
13 15 0005
13 15 0018
13 15 0030
00010
WATER
TEMP
CENT
13.2
12.8
9.8
6.8
20.2
20.0
14.3
8.8
16.9
17.0
16.7
15.2
00665
PHOS-TOT

MG/L P
0.018
C.020
0.029
0.018
0.012
U.021
0.019
C.006
0.020
0.018
0.017
0.029
00300
DO

MG/L
9.
10.
5.
9.
7.
2.
7.
2.
8.
9.
8.
5.
00077
TrtANSP
StCCMl
INCHES
8 132
0
6
4
8 240
0
8
0
8 60
0
8
2
00094
CNDUCTVY
FIELD
MICSOMHO
100
98
91
86
119
113
103
92
109
109
107
105
00400
PH

su
3.20
8.30
7.50
8.40
8.30
8.80
8.50
7.50
8.60
8.75
8.70
8.15
00410
T ALK
CAC03
MG/L
34
83
84
56
61
61
59
63
65
66
65
69
00610 00625
NH3-N TOT KJEL
TOTAL
MG/L
0.020
0.030
0.020
0.030
0.020
0.030
0.020
0.050
0.020K
0.020K
0.020K
0.020
N
MG/L
0.400
0.600
0.500
0.500
0.600
0.600
0.600
0.700
0.400
0.400
0.400
0.300
00630
N02&N03
N-TOTAL
MG/L
0.020K
0.020K
0.020K
0.020
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00671
PHOS-DIS
ORTrtO
MG/L P
0.007
0.01«
0.012
0.018J
0.003
0.004
0.005
0.013K
0.003
0.003
0.002
0.003
32217 00031
CHLRPHYL INCOT LT
A
UG/L
5.



4.



0.



REMNING
PERCENT
5



7



9





































































































           K« VALUE KNOWN TO Bt LESS
              THAN IMDICATEO

           J« ViLUE KNOWN TO BE I'-l

-------
SlfOSET RETRIEVAL OAfE 76/08/05

DATE
FROM
TO
75/06/02



75/07/28



75/09/05



75/10/22




TIME
OF
DAY
14 SO
14 50
14 50
14 50
11 00
11 00
11 00
11 00
13 30
13 30
13 30
13 30
15 15
15 15
15 15
15 15

DEPTH

FEET
0000
0005
0015
0022
0000
0005
0015
0020
0000
0005
0018
0025
0000
0005
0015
0022
00010
*ATER
TEMP
CENT
12.0
10.4
7.9
7.4
19.8
19.8
19.5
15.7
16.5
16.2
15. 8
15.8
11.0
11.0
11. 0
10.9
                                                                  300703
                                                                 47 55 03.0 114 23 20.0 3
                                                                 MARY SONAN LAKE
                                                                 3004?   MONTANA
                                                                                          130291
                                                                 11EPALES             2111202
                                                                  0026 FEET  DEPTH  CLASS 00
00300
DO

MG/L
10.2
10.0
9.4
8.2
7.8
8.0
8.4
9.6
8.8
8.6
8.6
8.2
7.6
7.6
7.9
7.4
OS077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES MICROMHO
132 98
94
88
86
150 125
123
115
105
60 107

105
103
84 102
103
102
102
00400
Prt

SU
8.40
8.30
7.75
7.60
8.70
8.80
8.80
8.70
8.70
8.75
8.75
8.70
7.50
7.60
7.55
7.50
00410
T ALK
CAC03
MG/L
63
61
59
58
67
67
59
59
68
68
66
65
69
69
70
71
00610 00625
NH3-N TOT KJEL
TOTAL
MG/L
0.040
0.030
0.020K
0.020K
0.020
0.020
0.030
0.030
0.020K
0.020K
0.020K
0.020K
0.030
0.080
0.080
0.090
N
MG/L
0.500
0.500
0.500
0.600
0.600
0.600
0.500
0.600
0.300
0.300
0.300
0.800
0.600
0.600
0.500
1.000
00630
N02&N03
N-TOTAL
MG/L
0.020
0.020K
0.020K
0.020K
0.020
0.020K
0.020
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00671
PHOS-DIS
ORTHO
MG/L P
0.018
0.013
0.012
0.013
0.005
0.004
0.004
0.004
0.003
0.002K
0.004
0.004
0.012
0.009
0.007
0.006
DATE
FROM
TO
75/06/02



75/07/28



75/09/05



75/10/22



00665 32217 00031
TIME DEPTH PHOS-TOT CHLRPHYL INCDT LT
OF A REMNING
DAY FEET
14
14
14
14
11
11
11
11
13
13
13
13
15
15
15
15
50
50
50
50
00
00
00
00
30
30
30
30
15
15
15
15
0000
0005
0015
0022
0000
0005
0015
0020
0000
0005
0018
0025
OOCO
0005
0015
0022
MG/L P
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
.029
.023
.020
.024
.011
.012
.013
.019
.016
.015
.017
.052
.079
.063
.050
.067
JG/L PERCENT
5.7



3.2



1.0



16.2



          K VALUE KNOWN TO BE
          LESS THAN INDICATED

-------
  APPENDIX E
TRIBUTARY DATA

-------
STORET RETRIEVAL DATE 76/08/05
  DATE   TIME DEPTH N02&N03
  FROM    OF
   TO    DAY  FEET

74/10/02 10 25
74/10/05 12 05
74/12/07 12 45
75/06/05 12 00
75/06/10 18 45
75/07/12 14 30
75/08/20 11 00
75/09/06 11 30
                                                                  3007A1
                                                                 47 54 18.0 114 22 50.0 4
                                                                 RONAN CREEK
                                                                 30      7.5 MRY RONAN LK
                                                                 0/MARY RONAN LAKE         130291
                                                                 UNMPRVD RD XI"JG 3.5 MI tINirf OF PROCTOR
                                                                 11EPALES             2111204
                                                                  0000 FEET  DEPTH  CLASS  00
0630
!«.N03
OTAL
IG/L
0.016
0.016
0.008
0.010
0.005
0.005
0.005
0.005
00625
TOT KJEL
N
MG/L
1.600
0.700
0.600
0.800
1.050
0.700
0.850
0.550
00610
NH3-N
TOTAL
MG/L
0.135
0.010
0.015
0.020
0.025
0.055
0.040
0.025
00671
PHOS-DIS
ORTHO
MG/L P
0.005
0.005K
0.005K
0.015
0.005
0.010
0.022
0.005K
00665
PHOS-TOT

MG/L P
0.030
0.020
0.010
0.050
0.050
0.070
0.060
0.020
    K  VALUE KNOWN TO BE
    LESS  THAN  INDICATED

-------
bTORET RETRIEVAL DATE 76/03/C5
  DATE   TIME DEPTH M02&.N03
  FROM    OF
   TO    DAY  FEET

74/10/02 10 45
74/10/05 12 30
74/12/07 13 00
75/06/05 14 15
75/06/10 10 45
75/07/12
75/08/20 11 00
75/09/05 12 00
                                                                   300781
                                                                 47 55  10.0  114 25  25.0  4
                                                                 MEELAND CREE<
                                                                 30      7.5 MRY RONAN LK
                                                                 T/MASY RONAN LAKE         130291
                                                                 UNMPHfVO «0 XING 6  MI WNM  OF PROCTOR
                                                                 11EPALES             2111204
                                                                   0000  FEET  DEPTH  CLASS  00
0630
'&.N03
OTAL
1G/L
C.OOb
0.012
0.008
0.005
0.005
0.015
0.005
C.010
00625
TOT KJEL
N
MG/L
0.400
0.300
0.200
0.600
0.300
0.250
0.500
0.400
00610
NH3-N
TOTAL
MG/L
0.040
0.010
0.015
0.030
0.010
0.025
0.025
0.025
00671
PHOS-DIS
ORTHO
MG/L P
0.005K
0.005K
0.010
0.025
0.020
0.015
0.030
0.010
00665
PHOS-TOT

MG/L P
0.010K
0.010
0.020
0.050
0.050
0.040
0.110
0.050
    K  VALUE  KNOWN  TO BE
    LESS  THAN  INDICATED

-------
STJRET *KTRIEVAL DATE 76/08/05
  DATE   TIME DEPTH N02&N03
  FROM    OF
   TO    DAY  FEET

74/10/02 09 45
74/10/05 11 05
74/12/07 12 15
75/06/05 18 00
75/06/10 09 45
75/07/12 14 30
75/08/20 11 00
75/09/06 14 30
                                                                  3007C1
                                                                 47  56  36.0  114 23  55.0  4
                                                                 DONALDSON CREEK
                                                                 30       7.5 MRY ROMAN LK
                                                                 T/MARY RONAN LAKE         130291
                                                                 UNMPKVD  HO  XING .2 M *  VLG OF LK MRY RON
                                                                 11EPALES             21112C4
                                                                  0000  FEET   DEPTH   CLASS 00
0630
'S.N03
OTAL
IG/L
0.008
0.012
0.008
0.005
0.010
0.010
0.005
0.005
00625
TOT KJEL
N
MG/L
0.700
0.150
0.400
0.750
0.550
0.900
0.350
0.150
00610
NH3-N
TOTAL
MG/L
0.020
0.007
0.015
0.010
0.015
0.035
0.030
0.030
00671
PHOS-DIS
ORTHO
MG/L P
0.005
0.005
0.005K
0.010
0.005
0.010
0.025
0.005K
00665
PHOS-TOT

MG/L P
0.010K
0.020
0.010K
0.030
0.040
0.050
0.030
0.010K
   K VALUE KNOWN TO BE
   LESS THAN INDICATED

-------