U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
GEORGETOWN [AYE
LODGE AND GRANITE COUNTIES
mm
EPA REGION VI11
WORKING PAPER No, 793
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
-------
REPORT
ON
GEORGETOWN LAKE
UODGE AND GRANITE COUNTIES
MONTANA
EPA REGION VI11
WORKING PAPER No, 793
WITH THE COOPERATION OF THE
MONTANA DEPARTMENT OF HEALTH & ENVIRONMENTAL SCIENCES
AND THE
MONTANA NATIONAL GUARD
MAY, 1977
-------
CONTENTS
Page
Foreword ii
List of Montana Lakes and Reservoirs iv
Lake and Drainage Area Map v
Sections
I. Conclusions . 1
II. Lake and Drainage Basin Characteristics 3
III. Lake Water Quality Summary 4
IV. Nutrient Loadings 8
V. Literature Reviewed 12
VI. Appendices • 13
-------
11
FOREWORD
The National Eutrophication Survey was initiated in 1972 in
response to an Administration commitment to investigate the nation-
wide threat of accelerated eutrophication to freshwater lakes and
reservoirs.
OBJECTIVES
The Survey was designed to develop, in conjunction with state
environmental agencies, information on nutrient sources, concentrations,
and impact on selected freshwater lakes as a basis for formulating
comprehensive and coordinated national, regional, and state management
practices relating to point-source discharge reduction and non-point
source pollution abatement in lake watersheds.
ANALYTIC APPROACH
The mathematical and statistical procedures selected for the
Survey's eutrophication analysis are based on related concepts that:
a. A generalized representation or model relating
sources, concentrations, and impacts can be constructed.
b. By applying measurements of relevant parameters
associated with lake degradation, the generalized model
can be transformed into an operational representation of
a lake, its drainage basin, and related nutrients.
c. With such a transformation, an assessment of the
potential for eutrophication control can be made.
LAKE ANALYSIS
In this report, the first stage of evaluation of lake and water-
shed data collected from the study lake and its drainage basin is
documented. The report is formatted to provide state environmental
agencies with specific information for basin planning [§303(e)], water
quality criteria/standards review [§303(c)], clean lakes [§314(a,b)],
and water quality monitoring [§106 and §305(b)] activities mandated
by the Federal Water Pollution Control Act Amendments of 1972.
-------
iii
Beyond the single lake analysis, broader based correlations
between nutrient concentrations (and loading) and trophic condi-
tion are being made to advance the rationale and data base for
refinement of nutrient water quality criteria for the Nation's
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.
-------
IV
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES AND RESERVOIRS
STATE OF MONTANA
LAKE NAME
Canyon Ferry
Clark Canyon
Flathead
Georgetown
Hebgen
Koocanusa
Mary Ronan
McDonald
Nelson
Seeley
Swan
Tally
Tiber
Tongue River
Whitefish
Yellowtail
COUNTY
Broadwater, Lewis and Clark
Beaverhead
Flathead, Lake
Deer Lodge, Granite
Gal latin
Lincoln, MT; British Columbia, Can,
Lake
Flathead
Phillips
f
Missoula
Lake
Flathead
Liberty, Toole
Big Horn
Flathead
Carbon, Bighorn, MT; Bighorn, WY
-------
GEORGETOWN LAKE
-------
GEORGETOWN LAKE
STORE! NO. 3004
I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate that Georgetown Lake is eutrophic. It
ranked ninth in overall trophic quality when the 15 Montana lakes
and reservoirs sampled in 1975 were compared using a combination
of six parameters*. Eight of the water bodies had less and one
had the same median total phosphorus, ten had less median dis-
solved orthophosphorus, none had less but four had the same median
inorganic nitrogen, 12 had less mean chlorophyll a_, and seven had
greater mean Secchi disc transparency. Some depression of dis-
solved oxygen with depth occurred at stations 1 and 3 in July.
The Montana Department of Fish and Game reports that extensive
growths of aquatic vegetation occur in the lake (Whitney, 1972).
Fish kills occasionally occur due to oxygen depletion during periods
of ice cover (Ketelle and Uttormark, 1971).
B. Rate-Limiting Nutrient:
The algal assay results indicate that Georgetown Lake was
nitrogen limited at the time the sample was collected (07/29/75).
The lake data indicate nitrogen limitation at all three sta-
tions in July and at two of the three stations in September.
* See Appendix A.
-------
2
C. Nutrient Controllability:
1. Point sources—No known municipal or industrial waste-
water treatment plants impacted Georgetown Lake during the sam-
pling year.
Septic tanks serving lakeshore dwellings, camps, and a park
are estimated to have added 7% of the measurable phosphorus
load to the lake, but a shoreline survey would be necessary to
determine the actual contributions of those sources. However, in
terms of fishing pressure per hectare, Georgetown Lake is the most
heavily used of all Montana lakes (Whitney, op. cit.), and septic
tank loads may be of greater significance than is estimated.
During the sampling year, the phosphorus loading to the lake
from measurable sources amounted to only 18% of that proposed by
Vollenweider (Vollenweider and Dillon, 1974) as a eutrophic loading
(see page 11). However, the trophic condition of the lake indicates
the actual loading probably is at or near a eutrophic loading (i.e.,
about 4,250 kg/yr). If so, the load contributed by the submarine
springs must be substantial.
2. Non-point sources--It is estimated that non-point sources
contributed 93% of the measurable phosphorus load during the sam-
pling year. The North Fork of Flint Creek contributed about 12%,
and the ungaged minor tributaries and immediate drainage contributed
an estimated 55.8%. However, as noted above, the submarine springs
probably are the most significant non-point source.
-------
II. LAKE AND DRAINAGE BASIN CHARACTERISTICS1"
A. Morphemetry :
1. Surface area: 11.20 kilometers2.
2. Mean depth: 3.4 meters.
3. Maximum depth: 11.6 meters.
4. Volume: 38.288 x 106 m3.
5. Mean hydraulic retention time: 342 days.
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Drainage Mean flow
Name area (km2)ttt (m3/sec)ttt
North Fork Flint Creek 37.3 0.144
Submarine springs* - 0.493
Minor tributaries &
immediate drainage - 88.8 0.660
Totals 126.1 1.297
2. Outlets -
Anaconda Aqueduct - 0.527
Flint Creek 137.3 0.770
Totals 137.3** 1.297
C. Precipitation***:
1. Year of sampling: 52.0 centimeters.
2. Mean annual: 38.3 centimeters.
t Table of metric conversions—Appendix B.
tt Horpestad, 1975.
ttt For limits of accuracy, see Working Paper No. 175, "...Survey Methods,
1973-1976".
* Submarine spring flow accounts for difference between surface inflow
and outflow (Knight et al., 1976).
** Includes area of lake.
*** See Working Paper No. 175.
-------
4
III. WATER QUALITY SUMMARY
Georgetown Lake was sampled two 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
a number of depths at three stations on the lake (see map, page v).
During each visit, a single depth-integrated (4.6 m or near bottom
to surface) sample was composited from the stations for phytoplankton
identification and enumeration; and in July, 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 9.4
meters at station 1, 5.5 meters at station 2, and 4.6 meters at sta-
tion 3.
The sampling results are presented in full in Appendix D and
are summarized in the following table.
-------
A.
OF PHYSICAL
CHEMICAL CHARACTERISTICS FOR GEORGETOWN
STORET CODE 3004
TEMP (o
DISS OXY (MG/,1
PH (STAND UNITS)
TOT ALK (MC-/L)
TOT P (MG/L)
OHTHO P (MG/U
N02»N03 (MG/L)
AMMONIA (MG/L)
KJEL N (MG/L)
INORG N (MG/L)
TOTAL N (MG/L>
CHLRPYL A (Uf,/L)
SECCHI (METERS)
1ST SAILING ( 7/29/7^)
3 SITES
^-NGE MEAN MEDIAN
14.2
4.6
16?.
8.6
100.
U.01*
0.011
0.020
0.020
0.300
0.04C
0.320
3.6
3.4
- 16.
0*400 IrlHHHr •9«9«v4«virv4vw4«vv4v4
0.420
6.h
2 • 7 * *
-------
B.
Biological Characteristics:
1. Phytoplankton -
Sampling
Date
07/29/75
09/04/75
2. Chlorophyll
Sampli ng
Date
07/29/75
09/04/75
Dominant
Genera
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
Fragilaria sp.
Oocystis sp.
Cryj)tomonas sp_.
Flagellates
Tetraedron sp.
Other genera
Total
Chroomonas sp.
Fragilaria sp.
Oscillatoria sp
Anabaena sp.
Microcystis sp.
Other genera
Total
Station
Number
1
2
3
1
2
3
C.
Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked
Spike (mg/1)
Control
0.05 P
0.05 P + 1.0 N
1.0 N
Ortho P
Cone, (mg/1)
0.015
0.065
0.065
0.015
Inorganic N
Cone, (mg/1)
0.035
0.035
1.035
1.035
Algal Units
per ml
2,616
641
529
84
56
56
110
1,476
Chlorophyll
(yg/D
4.2
3.6
10.4
6.8
4.6
12.3
Maximum yield
(mg/1 - dry wt.)
3.6
3.7
23.1
7.8
-------
2. Discussion -
The control yield of the assay alga, Selenastrum capri-
cornutum, indicates the potential primary productivity of
Georgetown Lake was moderately high at the time the sample
was collected (07/29/75). Also, the lack of yield increase
with the addition of phosphorus until nitrogen was also added
indicates nitrogen limitation at that time. Note that the
addition of nitrogen alone resulted in a yield significantly
greater than that of the control.
The lake data indicate nitrogen limitation at all stations
in July (the mean inorganic nitrogen/orthophosphorus ratios were
4/1 or less) and at stations 1 and 2 in September (the mean N/P
ratios were 10/1 and 13/1, respectively); however, phosphorus
limitation is indicated at station 3 in September (the mean
N/P ratio was 20/1).
-------
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 when possible 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
outlet and the North Fork Flint Creek.
In this report, nutrient loads for sampled tributaries were
calculated using mean annual concentrations and mean annual flows.
Nutrient loads for the Anaconda Aqueduct were calculated using the
mean concentrations in the Flint Creek outlet (station A-l) and the
monthly flows provided by the Anaconda Company.
Nutrient loads for unsampled "minor tributaries and immediate
drainage" ("II" of U.S.G.S.) were estimated using the mean concentrations
in the North Fork Flint Creek at station B-l and the mean annual II flow.
Nutrient loads were not estimated for the extensive submarine spring
flows known to occur in the lake (Shields, 1976).
A. Waste Sources:
1. Known municipal -None
2. Known industrial - None
-------
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
kg P/ % of
Source jyr total
a. Tributaries (non-point load) -
North Fork Flint Creek 95 12.2
Submarine springs ?
b. Minor tributaries & immediate
drainage (non-point load) - 435 55.8
c. Known municipal STP's - None
d. Septic tanks* - 55 7.0
e. Known industrial - None
f. Direct precipitation** - 195 25.0
Total 780 100.0
2. Outputs -
Lake outlet - Aqueduct 500
Flint Creek 730
Total 1,230
3. Net annual P accumulation - unknown; unmeasured load in spring flow.
* Estimate based on 143 lakeshore dwellings, eight camps, and one park; see
Working Paper No. 175.
** See Working Paper No. 175.
-------
10
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
kg N/ % of
Source yr total
a. Tributaries (non-point load) -
North Fork Flint Creek 3,920 10.8
Submarine springs ?
b. Minor tributaries & immediate
drainage (non-point load) - 17,960 49.8
c. Known municipal STP's - None
d. Septic tanks* - 2,125 5.9
e. Known industrial - None
f. Direct precipitation** - 12,090 33.5
Total 36,095 100.0
2. Outputs -
Lake outlet - Aqueduct 15,255
Flint Creek 22,290
Total 37,545
3. Net annual N accumulation - unknown; unmeasured load in spring flow.
D. Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr kg N/km2/yr
North Fork Flint Creek 3 105
E. Mean Nutrient Concentrations in Ungaged Stream:
Mean Total P Mean Total N
Tributary Cone, (mg/1) Cone, (mg/1)
Blodgett Gulch 0.097 0.823
* Estimate based on 143 lakeshore dwellings, eight camps, and one park; see
Working Paper No. 175.
** See Working Paper No. 175.
-------
11
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 0.07* ? 3.2* ?
Vollenweider phosphorus loadings
(g/m2/yr) based on mean depth and mean
hydraulic retention time of Georgetown Lake:
"Dangerous" (eutrophic loading) 0.38
"Permissible" (oligotrophic loading) 0.19
* Measurable loading.
-------
12
V. LITERATURE REVIEWED
Horpestad, Abe, 1975. Personal communication (lake morphometry).
MT Dept. of Health & Env. Sci., Helena.
Ketelle* Martha J., and Paul D. Uttormark, 1971. Problem lakes
in the United States. EPA Water Poll. Contr. Res. Ser., Proj.
16010 EHR, Wash., DC.
Knight, Jonathon C., Paul J. Garrison, and John C. Wright, 1976.
An investigation into the extent and cause of eutrophication
in Georgetown Lake, Montana. Rept. No. 77, MT U. Joint Water
Resources Res. Ctr., Bozeman.
Shields, Ronald A., 1976. Personal communication (submarine springs
in Georgetown Lake). U.S. Geol. Surv., 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.
Whitney, Arthur N., 1972. Personal communication (use and condition
of Georgetown Lake). MT Dept. of Fish & Game, Helena.
-------
VI. APPENDICES
13
APPENDIX A
LAKE RANKINGS
-------
LA
2
16
1
*LO«A
.316
.375
.273
.983
.033
.669
.673
.467
.233
.171
.?89
.083
.806
.873
.400
M
i*
12
9
10
13
10
14
6
11
13
9
9
9
13
7
15-
IN uO
.400
.000
.000
.200
.800
.400
.200
.400
.400
.200
.600
.200
.600
.600
.000
MEDIAN
DI5S 0«THC r-
0 . 0 2 v
0. Jil
0.00*
O.Oil
0.02U
0.04*
0.006
0.002
0.007
0.010
0.004
0.004
0.004
0.008
0.003
-------
OF
* 1-iI5H£st VAL'JES
CODE
3001
3002
3003
3004
3005
3006
3007
30p«
3009
3010
3011
3012
3013
3014
3016
La
*>
10)
10)
4)
13)
0)
5)
13)
6)
8)
0)
6)
10)
500-
MEA", iE
21 '
29 (
93 (
50 (
43 <
71 (
36 <
100 <
7 (
57 (
86 (
64 <
14 (
0 (
79 (
r
3)
<*>
13)
7)
6)
10)
5)
14)
1)
8)
12)
9)
2)
0>
11)
MEAN
Crtl.O*
21 (
64 (
93 I
1- (
36 (
57 (
29 (
100 (
7 (
71 (
43 (
79 (
50 (
0 (
86 (
15-
A MIN 00
3)
V)
13)
2)
5)
8)
4)
14)
1)
10)
6)
11)
7)
0)
12)
0 (
36 <
86 (
57 (
14 (
50 (
7 (
100 <
43 (
29 (
68 (
79 (
68 (
21 (
93 (
0)
5i
12)
X)
2)
7)
1)
14)
6)
4)
9)
11)
9)
3)
13)
•ME J I AN
01 iS J~nnO <-
t (
14 I
75 (
29 (
21 (
0 (
57 (
100 (
50 (
36 (
75 (
75 (
75 (
43 (
93 (
1)
2)
9)
4)
3)
0)
8)
IH)
7)
5)
9)
9)
9)
6)
13)
INDEX
NO
77
171
<••* /
268
232
22e
275
504
172
353
397
429
268
110
519
-------
LAKES RANKED BY INOE* NOS.
RANK LAKE CODE LAKE NAME INDE* NO
1 3016 fcrilTEFISH 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"4 = acre/feet
Square kilometers x 0.3861 = square miles
Cubic meters/sec x 35.315 = cubic feet/sec
Centimeters x 0.3937 = inches
<•
Kilograms x 2.205 = pounds
Kilograms/square kilometer x 5.711 - Ibs/square mile
-------
APPENDIX C
TRIBUTARY FLOW DATA
-------
TRIBUTARY rLO* INFORMATION FOR MONTANA
12/0376
LAKE CODE 3004
GEORGETOWN LAKE
TOTAL DRAINAGE APEA OF i_AKE(SO KM)
SUB-DRAINAGE
TRIBUTARY AREAfSQ KM)
137.3
APR
MAY
NORMALIZED FLOrfS(CMS)
JUN
SEP
OCT
NOV
DEC
MEAN
3004A1
3004B1
3004C1
3004ZZ
137.3
37.3
0.0
ea.i
0.44
0.014
1.274
0.24
0.47
0.014
1.274
0.24
0.45
0.014
1.274
0.24
0.56
0.028
1.274
0.42
0.79
0.142
0.0
1.70
1.53
0.566
0.0
2.83
1.33
0.425
0.0
0.85
0.95
0.283
0.0
0.23
0.3d
0.142
0.0
0.25
0.66
0.057
0.0
0.31
0.58
0.028
0.0
0.31
0 . *»8
0.014
1.274
0.28
0.77
0. 144
0.527
0.66
SUMMARY
TOTAL DRAINAGE AREA OF LAKE = 137.3
SUM OF SUB-DRAINAGE AREAS = 125.4
TOTAL FLOW IM = 16.07
TOTAL FLOW OUT = 9.23
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY
3004A1
MONTH YEAR
MEAN FLOW DAY
3004B1
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
0.340
0.119
0.076
0.082
0.096
0.116
0.122
0.343
1.662
3.710
2.223
1.048
0.028
0.023
0.014
0.011
0.011
0.008
0.014
0.048
0.821
1.671
0.340
0.198
5
2
7
4
1
1
5
4
1
7
5
2
7
4
1
1
5
4
1
29
3
7
FLOW DAY
0.340
0.340
0.085
0.085
0.085
0.113
0.113
0.125
1.274 7
0.934
0.034
0.023
0.014
0.014
0.008
0.006
0.008
0.014
0.142
0.850
0.566
0.227
FLOW DAY
FLOW
1.274
21
0.0
0.283
-------
TRIBUTARY FLOW INFORMATION FO* MONTANA
12/0376
LA^E CODE 3004
GEORGETOWN LA
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STORET RETRIEVAL DATE 76/08/05
300401
46 12 45.0 113 15 50.0 3
GEORGETOWN RESERVOIR
30023 MONTANA
11EPALE5 2111202
0034 FEET DEPTH CLASS 00
DATE
FROM
TO
75/07/29
75/09/0<»
DATE
FROM
TO
75/07/29
75/09/04
TIMF DEPTH
OF
DAY FEET
10 20
10 20
10 20
10 20
09 20
09 20
09 ?0
09 20
TIME
OF
DAY
10 20
10 20
10 20
10 20
09 ?0
09 20
09 20
09 20
0000
0005
0015
0030
0000
0005
0023
0031
DEPTH
FEET
0000
0005
0015
0030
0000
0005
0023
0031
00010
WATER
TEMP
CENT
16.9
If). 9
16.2
14.2
14.0
14.0
13.9
13.9
00665
PHOS-TOT
MG/L P
0.031
0.023
0.022
0.021
0.021
0.020
0.021
0.022
00300 00077 00094
00 TRANSP CNDUCTVY
SECCHI FIELD
MG/L INCHES MICROMHO
9.0 132
9.0
8.0
5.6
6.6 108
8.2
8.6
8.8
32217 00031
CHLRPHYL INCDT LT
A REMMNG
UG/L PERCENT
4.2
6.8
162
167
162
162
145
143
143
145
00400 00410
PH T ALK
CAC03
su
9
8
8
8
8
8
8
8
.10
.90
.90
.60
.00
.30
.45
.50
MG/L
102
103
105
100
99
91
92
97
00610 00625
NH3-N TOT KJEL
TOTAL N
MG/L
0
0
0
0
0
0
0
0
.020
.020
.020
.020
.020K
.020K
.020K
.020K
MG/L
0.300
0.300
0.600
0.300
0.400
0.400
0.300
0.400
00630 00671
N02t»N03 PHOS-DIS
N-TOTAL ORTrtO
MG/L MG/L P
0.020K
0.020.K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.012
0.011
0.011
0.011
0.004
0.003
0.002K
0.007
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
ST:>RET RETRIEVAL DATE 76/os/os
300*02
46 11 00.0 113 15 35.0 3
GEORGETOWN rfESERVOIS
30023 MONTANA
DATE
F^OM
TO
75/07/29
TIME DEPTH
OF
JAY FEET
10 *5 0000
10 45 0005
10 45 0010
10 45 ooie
75/09/04 09 45 0000
09 45 0005
09 45 0016
00010
WATER
TEMP
CENT
16.7
16.8
16.2
14.8
13.9
13.8
13.8
HEHALcS 2111202
0022 FEET DEPTH CLASS
00300
DO
MG/L
9.4
8.4
8.2
7.2
8.8
9.?
9.6
00077
TRa.MSP
SECCHI
INCHES
iee
120
00094
CNDUCTVY
FIELO
MICROMHO
172
174
179
186
147
147
147
00400
PH
SU
8.90
8.90
8.90
8.60
8.60
6.60
8.65
00410
T ALK
CAC03
MG/L
104
105
105
109
100
99
101
00610
NH3-N
TOTAL
MG/L
0.030
0.020
0.020K
0.020
0.020K
0.020K
0.020K
00
00625
TOT KJEL
N
MG/L
0.400
0.300
0.400
0.400
0.300
0.300
0.400
00630 00671
N02&N03 PHOS-DIS
N-TOTAL ORTHO
MG/L MG/L P
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.02UK
0.015
0.015
0.012
0.013
0.004
0.002
0.002
DATE
FROM
TO
75/07/39
TIMF DEPTH
OF
DAY FEET
10 45 0000
10 45 0005
10 45 0010
10 45 0018
09 45 0000
09 45 0005
09 45 0016
G0665
PHOS-TOT
MG/L P
C.029
0.019
0.021
0.022
0.021
0.022
0.025
32217
CHLRPHYL
A
UG/L
3.6
4.6
00031
INCDT LT
REMNING
PERCENT
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STOPET RETRIEVAL DATE 76/OS/05
300403
46 19 35.0 113 18 55.0
GEORGETOWN RESERVOIR
30023 MONTANA
DATE
FROM
ro
75/07/29
75/09/04
TIME DEPTH
OF
DAY FEET
11 10 0000
11 10 0005
11 10 0015
10 10 0000
10 10 0005
10 10 0015
00010
WATER
TEMP
CENT
16.5
16.5
15.5
13.6
13.5
13.3
00300
00
MG/L
9.0
9.4
4.8
9.2
9.0
9.4
00077
TRftNSP CN
SECCHI FIELD
INCHES MI
168
80
UEP^LtS
001<* FEET
2111202
DEPTH CLASS 00
94
TVY
MHO
166
168
165
140
136
00400
PH
su
8.90
9.10
9.00
8.75
8.80
8.80
00410
T ALK
CAC03
MG/L
102
102
102
96
99
96
00610
NH3-N
TOTAL
MG/L
0.020
0.020
0.030
0.020K
0.020K
0.020K
00625
TOT KJEL
N
MG/L
0.400
0.400
0.300
0.400
0.400
0.400
00630
N028.N03
N-TOTAL
MG/L
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00671
PHOS-DIS
ORTHO
MG/L P
0.013
0.011
0.011
0.002*
0.002
0.002
DATE
FROM
TO
75/C7/29
75/09/04
TIME DEPTH
OF
DAY FEET
11 10 0000
11 10 0005
11 10 0015
10 10 0000
10 10 0005
10 10 0015
00665
PHOS-TOT
MG/L P
0.024
0.018
0.019
0.024
0.027
0.025
32217
CHLRPHYL
A
UG/L
10.4
12.3
00031
INCDT LT
REMNING
PERCENT
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
APPENDIX E
TRIBUTARY DATA
-------
STOKET RETRIEVAL DATE 76X06/05
(
(
1
(
I
(
(
i
<
{
1
t
00630 00625
DATE TIME DEPTH N02&N03 TOT KJEL
FROM OF N-TOTAL N
TO DAY FEET MG/L MG/L
74/10/05 10 45
74/11/02 09 55
74/12/07 11 30
75/01/04 12 45
75/02/01 12 45
75/03/01 11 00
75/04/05 12 50
75/05/04 13 00
75/06/01 05 00
75/06/07 13 30
75/07/29 13 00
75/08/03 14 00
75/09/07 11 20
0.104
0.024
0.048
0.096
0.072
0.072
0.095
0.230
0.100
0.065
0.045
0.045
0.085
0.600
1.000
1.100
1.500
0.800
0.900
0.900
0.400
2.000
0.800
0.300
0.300
0.250
000
00610 00671 00665
NH3-N PHOS-DI.S PHOS-TOT
TOTAL ORTHO
MG/L MG/L P MG/L P
0.010
0.025
0.020
0.040
0.064
0.120
0.130
0.130
0.180
0.115
0.010
0.020
0.005K
0.005
0.005
0.005
0.010
0.008
0.008
0.025
0.030
0.030
0.020
0.010
0.005
O.OOSK
0.015
0.010K
0.010K
0.010
0.020
0.040
0.050
0.050
0.070
0.050
0.030
0.030
0.010
K VALUE KNOWN TO 8E
LESS THAN
INDICATED
300441
46 12 54.0 113 16 47.0 4
FLINT CREEK
30 7.5 GEORGETwN UK
0/GECMGETO*N LAKE 130391
BELO* FLINT C*EEK DAM
11EPALES 2111204
0000 FEET DEPTH CLASS 00
-------
STOPET RETRIEVAL DATE 76/08/05
DATE TIME DEPTH N02&N03
FROM OF
TO DAY FEET
74/10/05
74/11/02
74/12/07
75/01/04
75/02/01
75/03/01
75/04/05
75/05/04
75/06/01
75/06/07
75/07/29
75/08/03
75/09/07
11 20
10 15
11 55
13 00
13 10
11 15
13 20
13 30
05 20
13 45
14 30
10 45
300431
46 11 49.0 113 16 00.0 4
NFORK FLINT CrtEEK
30 7.5 GEORGEToN LK
T/GEORGETOWN LAKE 130291
faRQG ON US «T 10A 1.4 M SE FLINT C*K 0AM
11EPALES 2111204
0000 FEET DEPTH CLASS 00
0630
&N03
OTAL
IG/L
0.024
0.003
0.016
0.016
0.024
0.024
0.025
0.040
0.050
0.015
0.005
0.005
0.015
00625
TOT KJEL
N
MG/L
1.775
0.900
0.100K
1.000
0.600
0.680
1.200
0.300
2.100
0.750
0.250
0.650
0.650
00610
NH3-N
TOTAL
MG/L
0.025
0.020
0.005
0.020
0.016
0.024
0.025
0.015
0.090
0.025
0.010
0.015
0.01C
00671
PHOS-DIS
ORTHO
MG/L P
0.005K
0.005K
0.005K
0.005
0.008K
0.008K
0.005
0.005K
0.005
0.005
0.005K
0.005K
0.005K
00665
PHOS-TOT
MG/L P
0.005
0.010K
0.010K
0.030
0.010K
0.012
0.070
0.010K
0.040
0.020
0.020
0.010K
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/03/05
DATE TIME DEPTH N02&N03
FROM OF
TO DAY FEET
74/10/02 10 40
74/10/05 12 40
75/06/01 18 10
75/06/07 14 00
75/07/29 15 15
75/08/03 16 00
75/09/07 10 25
300401
46 09 20.0 113 18 50.0 4
8UOOGETT GULCH
30 7.5 GEORGETWN LK
T/GEOSGETOHN LAKE 130291
BRQG ON UNPVD RD 2.2 MI SW OF OENTONS PT
11EPALES 2111204
0000 FEET DEPTH CLASS 00
0630
'&N03
OTAL
IG/L
0.008
0.028
0.050
0.140
0.005
0.005
C.020
00625
TOT KJEL
N
MG/L
0.900
0.500
2.700
0.200
0.425
0.100K
00610
NH3-N
TOTAL
MG/L
0.010
0.020
0.075
0.065
0.025
0.015
0.015
00671
PHOS-OIS
ORTHO
MG/L P
0.010
0.010
0.005
0.035
0.005K
0.005K
0.010
00665
PHOS-TOT
MG/L P
0.200
0.125
0.220
0.010
0.010
0.020
K VALUE KNOWN TO BE
LESS THAN INDICATED
------- |