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
-------
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
-------
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
-------
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.
-------
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
-------
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-
-------
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.
-------
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.
-------
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
-------
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
-------
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.
-------
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.
-------
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.
-------
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.
-------
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
-------
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.
-------
14
VI. APPENDICES
APPENDIX A
LAKE RANKINGS
-------
LA
-------
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
-------
LAKES RANKED 3V INOEx NOS.
RANK LAKE CODE LAKE NAME INDEX. NO
1 3016 *HITEFISH 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
4
Kilograms x 2.205 = pounds
Kilograms/square kilometer x 5.711 = Ibs/square mile
-------
APPENDIX C
TRIBUTARY FLOW DATA
-------
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
------- |