U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
NELSON RESERVOIR
PHILLIPS COUNTY
MONTANA
EPA EGION VIII
WORKING PAPER No, 798
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
-------
REPORT
ON
NELSON RESERVOIR
PHILLIPS COUNTY
MONTANA
EPA REGION VIII
WORKING PAPER No, 798
WITH THE COOPERATION OF THE
MONTANA DEPARTMENT OF HEALTH & ENVIRONMENTAL SCIENCES
AND THE
MONTANA NATIONAL GUARD
MAY, 1977
-------
CONTENTS
Page
Foreword 11
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)]5 water
quality criteria/standards review [0303(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.
-------
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. 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
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
-------
Mont.
L s
c'
Map Location
Vv
^x
NELSON RESERVOIR
Tributary Sampling Site
Lake Sampling Site
'PKm.
Scale
5 Mi.
\
4820-
x
107°40'
10730'
-------
NELSON RESERVOIR
STORE! NO. 3009
I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate that Nelson Reservoir is eutrophic.
It ranked twelfth in overall trophic quality when the 15 Montana
lakes and reservoirs sampled in 1975 were compared using a com-
bination of six water-quality parameters*. Ten of the water
bodies had less median total phosphorus, seven had less median
dissolved orthophosphorus, nine had less median inorganic nitrogen,
13 had less mean chlorophyll a^ and 13 had greater mean Secchi
disc transparency. Depression of dissolved oxygen with depth
occurred at station 2 in July.
Survey limnologists noted abundant submerged macrophytes during
the July sampling and an algal bloom in September.
B. Rate-Limiting Nutrient:
The algal assay results are not considered representative of
conditions in the reservoir at sampling time due to significant
changes in nutrients in the samples during shipment from the
field to the laboratory.
The reservoir data indicate nitrogen limitation at all sampling
stations and times, with the exception of station 1 in July.
* See Appendix A.
-------
2
C. Nutrient Controllability:
1. Point sources—No known municipal point sources impacted
Nelson Reservoir during the sampling year. Septic tanks serving
shoreline dwellings were estimated to have contributed 0.2% of
the total phosphorus load, but a shoreline survey would have to
be conducted to determine the significance of those sources.
The present phosphorus loading of 0.41 g/m2/year is greater
than that proposed by Vollenweider (Vollenweider and Dillon, 1974)
as a eutrophic loading (see page 11).
2. Non-point sources--Non-point sources accounted for 99.8%
of the total phosphorus load during the sampling year. The Nelson
Canal inlet contributed 95.5% of the total.
Major agricultural land uses in the area include pasturing
and crop land as reported by Survey limnologists. Further study is
needed to determine the controllability of the nutrient contributions
of such sources.
-------
II. RESERVOIR AND DRAINAGE BASIN CHARACTERISTICS1"
tt
A. Morphometry :
1. Surface area: 18.45 kilometers2.
2. Mean depth: 5.7 meters.
3. Maximum depth: 8.5 meters.
4. Volume: 105.165 x 106 m3.
5. Mean hydraulic retention time: 1.8 years (based on 1975 outflow)
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Drainage Mean flow
Name area (km2)* (m3/sec)*
Nelson Canal - 2.290
Minor tributaries &
immediate drainage - _^ . -
Totals - 2.290
2. Outlet -
Nelson Canal - 0.028**
Nelson South Canal - 1.869
Totals - 1.897
C. Precipitation***:
1. Year of sampling: 46.9 centimeters.
2. Mean annual: 30.0 centimeters.
t Table of metric conversions—Appendix B.
tt Surface area - Horpestad, 1974; volume - Martin and Hanson, 1966.
* For limits of accuracy, see Working Paper No. 175, "...Survey Methods,
1973-1976"; no drainage areas or normalized flows - canal flow is com-
pletely regulated (Pike, 1975).
** Leakage through canal gates.
*** See Working Paper No. 175.
-------
4
III. WATER QUALITY SUMMARY
Nelson Reservoir 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 two or more depths at three stations on the reservoir (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 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 a^
analysis. The maximum depths sampled were 1.5 meters at station
1, 11.6 meters at station 2, and 5.5 meters at station 3.
The sampling results are presented in full in Appendix D and
are summarized in the following table.
-------
PARAMETER
TE^P (C)
DISS OXY (MG/L)
CNDCTVY (MCROMO)
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)
INOP.G N (MG/L)
TOTAL N (MG/L)
CHLRPfL A (UG/L)
SECCHI (METERS)
A. SUMMARY OK PHYSICAL AND
1ST SAMPLING ( 5/30/75)
3 SITES
CHEMICAL CHARACTERISTICS F0r< NELSON RESERVOIK
STOrtET CODE 3009
2ND SAMPLING ( 7/24/75)
3 SITtS
3RD SAMPLING ( •?/ 8/75)
3 SITES
RANGE
10.0
8.2
420.
8.4
165.
0.023
0.011
0.080
0.040
0.400
0.120
0.500
1.3
0.5
- 14.0
- 10.0
- 553.
8.6
- 173.
- 0.052
- 0.022
- 0.150
- 0.060
- 0.700
- 0.210
- 0.820
5.4
2.1
ME AM
12.2
9.3
460.
8.5
169.
0.034
0.013
0.113
0.056
0.489
0.169
0.60?
2.7
1.3
MEDIAN
12.1
9.<»
449.
8.5
168.
0.031
0.019
0.100
0.060
0.500
0.160
0.580
1.5
1.3
RANGt
16.4
3.6
509.
8.2
171.
0.016
0.002
0.020
0.020
0.400
0.040
0.440
1.5
1.2
- 23.0
9.2
- 574.
8.8
- 181.
- 0.035
- 0.022
- 0.120
- 0.060
- 0.500
- 0.180
- 0.530
1.8
1.7
MEAN
21.0
7.2
560.
8.5
175.
0.025
0.007
0.048
0.034
0.422
0.082
0.470
1.6
1.5
MEDIAN
21.2
7.4
567.
8.5
175.
0.025
0.006
0.040
0.030
0.400
0.070
0.450
1.6
1.5
RANGE
15.8
8.8
562.
8.5
131.
0.024
0.003
0.020
0.020
0.600
0.040
0.620
1.3
0.6
- 17.9
- 10.0
- 582.
8.9
- 194.
- 0.061
- 0.013
- 0.020
- 0.040
- 1.200
- 0.060
- 1.220
- 41.8
0.6
MEAN
16.7
9.2
570.
8.7
186.
0.037
0.006
0.020
0.025
0.812
0.045
0.832
17.3
0.6
MEDIAN
16.7
9.2
569.
8.8
186.
0.033
0.003
0.020
0.020
0.800
0.040
0.820
8.9
0.6
-------
B. Biological Characteristics:
1. Phytoplankton -
Sampling
Date
05/30/75
07/24/75
09/08/75
2. Chlorophyll
Sampling
Date
05/30/75
07/24/75
09/08/75
Dominant
Genera
1. Chroomonas sp.
2. Centric diatoms
3. Cryptomonas sp.
4. Ankistrodesmus sp.
5. Nitzschia sj>.
Total
1. Chroomonas sp.
2. Aphanizomenon sp.
3. Ankistrodesmus sp.
Total
1. Aphanizomenon sp.
2. Flagellates
3. Chroomonas sp.
4. Oscillatoria sp.
5. Schroederia sp.
Other genera
Total
Station
Number
1
2
3
1
2
3
1
2
3
Algal Units
per ml
347
261
87
43
43
781
523
486
75
1,084
3,800
192
171
128
107
43_
4,441
Chlorophyll a
(yg/1)
1.3
1.5
5.4
1.5
1.6
1.8
1.3
8.9
41.8
-------
7
C. Limiting Nutrient Study:
Due to significant changes in nutrient levels during shipment
of the samples from the field to the laboratory, the algal assay
results are not considered representative of conditions in the
reservoir at the time the samples were taken (05/30/75 and 09/
08/75). The reservoir data indicate nitrogen limitation at all
sampling stations and times, with the exception of station 1 in
July. Except for station 1 in July, all of the mean inorganic
nitrogen/orthophosphorus ratios were 13/1 or less, and nitrogen
limitation would be expected. The ratio of 21/1 at station 1 in
July indicates phosphorus limitation.
-------
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 were provided by the Montana District Office of
the U.S. Geological Survey which received the daily and monthly
regulated flows for Nelson Canal from the U.S. Bureau of Reclamation.
In this report, nutrient loads for the sampled tributary were
calculated using mean concentrations and mean flow.
No known wastewater treatment plants impacted the reservoir during
the sampling year.
A. Waste Sources:
1. Known municipal - None
2. Known industrial - None
-------
9
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
kg P/ % of
Source yr total
a. Tributaries (non-point load) -
Nelson Canal 7,295 95.5
b. Minor tributaries & immediate
drainage (non-point load) - -
c. Known municipal STP's - None
d. Septic tanks * - 15 0.2
e. Known industrial - None
f. Direct precipitation** - 325 4.3
Total 7,635 100.0
2. Outputs -
Reservoir outlet - Nelson Canal 45
Nelson South
Canal 1.295
Total 1,340
3. Net annual P accumulation - 6,295 kg.
* Estimate based on 50 shoreline dwellings (field limnologists observations);
see Working Paper No. 175.
** See Working Paper No. 175.
-------
10
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
kg N/ % of
Source ^r total
a. Tributaries (non-point load) -
Nelson Canal 134,975 86.8
b. Minor tributaries & immediate
drainage (non-point load) - -
c. Known municipal STP's - None
d. Septic tanks* - 535 0.4
e. Known industrial - None
f. Direct precipitation** - 19,920 12.8
Total 155,430 100.0
2. Outputs -
Reservoir outlet - Nelson Canal 1,650
Nelson South
Canal 79.745
Total 81,395
3. Net annual N accumulation - 74,035 kg.
* Estimate based on 50 shoreline dwellings (field limnologists observations);
see Working Paper No. 175.
** See Working Paper No. 175.
-------
11
D. 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 0.41 0.34 8.4 4.0
Vollenweider phosphorus loadings
(g/m2/yr) based on mean depth and mean
hydraulic retention time of Nelson Reservoir:
"Dangerous" (eutrophic loading) 0.36
"Permissible" (oligotrophic loading) 0.18
-------
12
V. LITERATURE REVIEWED
Horpestad, Abe, 1974. Personal communication (reservoir morphometry).
MT Dept. of Health & Env. Sci., Helena.
Martin, R. 0. R., and Ronald L. Hanson, 1966. Reservoirs in the
United States. Water Supply Paper No. 1838, U.S. Geol. Surv.,
Wash., DC.
Pike, George M., 1975. Personal communication (regulated flow in
Nelson Canal). 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 Rubl. No. 13690, Canada Centre
for Inland Waters, Burlington, Ontario.
-------
13
VI. APPENDICES
APPENDIX A
LAKE RANKINGS
-------
LAKE OAT* TO bE USEO IN RANKINGS
,LA
-------
OF LAKES WITH *UGH£P VALUES >
10)
5)
14)
1)
8)
12)
9)
2)
0)
11)
MEAN
CriLOSA
21 (
64 (
93 (
1^. (
36 (
57 (
39 (
100 (
7 <
71 t
43 (
79 (
50 (
0 (
86 (
3)
9)
1J)
2)
b)
6)
4)
14)
1)
10)
6)
11)
7)
0)
13)
15-
MIN DO
0 <
36 (
86 <
57 (
14 (
50 (
7 (
100 (
43 (
29 (
68 (
79 (
68 (
21 (
93 (
0)
5)
12)
8)
2)
7)
D
14)
6)
4)
9)
11)
9)
3)
13)
MED I AN
DISS OHTnO f
7 (
14 (
75 l
29 (
21 (
0 <
57 (
100 (
50 (
36 (
75 <
75 (
75 (
43 (
93 (
1)
2)
9)
4)
3)
0)
8)
!•»>
7)
5)
9)
9)
9)
6)
13)
INOE*
NO
77
171
<»*/
268
232
22e
275
504
172
353
39?
429
268
110
519
-------
LA
-------
APPENDIX B
CONVERSION FACTORS
-------
CONVERSION FACTORS
Hectares x 2.471 = acres
Kilometers x 0.6214 = miles
Meters x 3.281 = feet
Cubic meters x 8.107 x 10 = acre/feet
Square kilometers x 0.3861 = square miles
«
Cubic meters/sec x 35.315 = cubic feet/sec
Centimeters x 0.3937 = inches
^
Kilograms x 2.205 = pounds
Kilograms/square kilometer x 5.711 - Ibs/square mile
-------
APPENDIX C
TRIBUTARY FLOW DATA
-------
TRIBUTARY FLO* INFORMATION FGk MONTANA
CODE 3009 NELSON RESERVOIR
TOTAL DRAINAGE AREA OF LAKEfSQ KM) 0.0
08/05/76
SUB-ORAINAGE
TRIBUTARY AR^A(SQ KM)
3009ZZ
0.0
JAN
0.0
U.O
APR
0.0
MAY
0.0
J'JN J
0.0 0.0
SUMMARY
NORMALIZED FLO*S(CM5>
AUG
0.0
SEP
0.0
OCT
0.0
N0
TRIbUTARY MONTH YEAR MEAN FLOW DAY FLOW DAY
0.0
0.0
TOTAL FLO* IN =
TOTAL FLO* OUT =
0.0
0.0
3009A1
3009A2
300981
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
<*
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
74
74
74
75
75
75
75
75
75
75
75
75
0.0
OiO
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.283
0.0
0.0
0.0
0.0
0.0
0.878
4. 116
2.577
1.671
5.239
1.274
0.0
0.566
0.0
0.0
0.0
0.0
0.0
0.283
2.747
4.64i»
2.265
0.708
b
3
8
4
2
5
3
6
26
23
27
5
3
8
4
2
5
3
6
26
23
27
5
3
8
4
2
5
3
6
26
23
27
0.028
0.028
0.028
0.028
0.023
0.028
0.028
0.028
0.028
0.028
0.028
1.416
0.028
0.0
0.0
0.0
0.0
4.955
4.248
2.124
2.832
0.706
0.028
0.028
0.028
0.028
0.0
22
20
FLOW DAY
0.028
FLOW
22
20
0.0
P.495
22
0.0
0.142
2.690 20
5.239
1.416
0.566
0.0
1.982
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STO*ET «£TRIEVAL DATE 76/03/05
300-J01
43 31 <»8.0 107 31 58.0 3
NELSON RESERVOIR
30071 MONTANA
090191
11EP6LES 2111202
0006 FEET DEPTH CLASS 00
DATE
FROM
TO
75/05/30
75/07/24
75/09/08
DATE
FROM
TO
75/05/30
75/07/24
75/09/Ofl
TIME DEPTH
OF
DAY FEET
09 50 0000
09 50 0005
15 20 0000
15 20 0005
14 00 0000
14 00 0005
TIME DEPTH
OF
DAY FEET
09 50 0000
09 50 0005
15 20 0000
15 20 0005
14 00 0000
14 00 0005
00010
HATER
TEMP
CENT
14.0
13.9
23.0
21.2
15.9
15.8
00665
PHOS-TOT
MG/L P
0.033
0.025
0.016
0.019
0.031
0.026
00300
DO
MG/L
9.8
10.0
7.4
7.4
8.8
32217
CHLRPHYL
A
UG/L
1.3
1.5
1.3
00077
TKANSP
SECCHI
INCHES
60
22
00031
1NCOT LT
REMNING
PERCENT
00094
CNDUCTVY
FIELD
MICROMHO
442
442
570
561
567
562
00400
PH
su
8.55
8.55
8.30
8.40
8.50
8.70
00410
T ALK
CAC03
MG/L
173
173
172
171
181
181
00610
NH3-N
TOTAL
MG/L
0.060
0.040
0.030
0.040
0.020K
0.020K
00625
TOT KJEL
N
MG/L
0.700
0.500
0.400
0.400
0.800
0.600
00630
N02&N03
N-TOTAL
MG/L
0.120
0.080
0.050
0.050
0.020K
0.020K
00671
PMOS-OIS
ORTHO
MG/L P
0.020
0.011
0.002
0.006
0.003
0.003
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
ST03ET RETRIEVAL OATE 76/08/05
300902
48 ?9 35.0 107 33 00.0 3
NELSON RESEPVOIR
30071 MONTANA
IIE^ALES 710109 3111202
00*2 FEET DtrTH CLASS 00
00010
HATER
TEM*1
CENT
12.1
12.0
11.3
10.0
10.8
22.7
20.9
20.4
16.4
17.9
16.9
16.5
16.2
00300
DO
MG/L
9.4
9.1
9.4
8.8
8.2
7.8
7.4
6.8
3^6
10.0
9.2
9.2
8.8
00077
TRANSP
SECCHl
INCHES
83
66
24
00094
CNDUCTVY
FIELD
MICtfOMHO
497
553
449
457
457
574
567
555
509
582
570
568
562
00400
PH
SU
8.50
8.50
8.50
8.50
8.40
8.50
8.50
8.40
8.20
8.70
8.75
8.75
8.75
00410
T ALK
CAC03
MG/L
173
172
167
167
168
174
175
175
177
184
184
187
138
00610
NH3-N
TOTAL
MG/L
0.060
0.050
0.060
0.050
0.060
0.020
0.030
0.040
0.060
0.020K
0.020K
0.020K
0.020K
00625
TOT KJEL
N
MG/L
0.400
0.400
0.400
0.400
0.500
0.400
0.400
0.400
0.400
0.800
0.800
0.600
0.600
00630
N02kN03
N-TOTAL
MG/L
0.100
0.100
0.120
0.100
0.100
0.040
0.049
0.040
0.120
0.020K
0.020K
0.020K
0.020K
00671
PMOS-DIS
ORTriO
MG/L P
0.018
0.017
0.016
0.019
0.021
0.006
0.005
0.007
0.022
0.005
0.004
0.003
0.003
DATE
FROM
TO
75/05/30
75/07/24
75/09/03
00665 32217 00031
TIMF DEPTH PHOS-TOT CrILRPHYL INCDT LT
OF A REMNING
DAY FEET
10 ?0 0000
10 20 0005
10 20 0015
10 20 0025
10 20 0038
15 45 0000
15 45 0005
15 45 0015
15 45 0034
14 25 0000
14 25 0005
14 25 0015
14 ?5 0032
MG/L P
0.025
0.023
0.026
0.031
0.037
0.025
C.022
0.027
0.033
0.042
0.035
0.024
0.028
UG/L PERCENT
1.5
1.6
a. 9
K VALUE KNOWN TO 8E
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/06/05
300903
4d 29 0^.0 107 36 40.0
NELSON RESERVOIR
30071 .MONTANA
11EPALES 760109 2111202
0007 FEET DEPTH CLASS 00
DATE
FROM
TO
75/05/30
75/07/24
75/09/08
DATE
FROM
TO
75/05/30
75/07/2*
75/09/08
TIME DEPTH
OF
DAY
10
10
16
16
16
14
14
SO
50
05
05
05
45
45
TIME
OF
DAY
10
10
16
16
16
14
14
50
50
05
05
05
45
45
FEET
0000
0005
0000
0005
0018
0000
0004
DEPTH
FEET
0000
0005
0000
0005
0018
0000
0004
00010
*ATER
'TEVP
CENT
13.0
13.0
22.4
22.0
20.4
17.2
17.0
00665
PHOS-TOT
MG/L P
0.052
0.052
0.021
0.031
0.035
0.049
0.061
00300
DO
MG/L
10.
9.
8.
9.
7.
9.
8.
32217
00077 00094
TRANSP CNOUCTVY
SECCnl FIELD
INCHES MICROMHO
0
4
0
2
0
4
8
CHLRPHYL
A
UG/L
5.
1.
41.
4
8
3
19
48
24
00031
INCDT LT
REMNING
PERCENT
422
420
572
565
568
577
575
00400 00410 00610 00625
PH T ALP; NH3-N TOT KJEL
CAC03 TOTAL N
SU
8.60
8.60
8.85
8.65
8.50
8.90
8. 90
•=
MG/L MG/L
166 0.060
165 0.060
175 0.030
175 0.020
181 0.040
190 0.040
194 0.040
MG/L
0.600
0.500
0.400
0.500
0.500
1.100
1.200
00630 00671
N02&N03 PriOS-DIS
N-TOTAL ORTHO
MG/L MG/L P
0.150
0.150
0.040
0.020K
0.030
0.020K
0.020K
0.021
0.022
0.004
0.006
0.007
0.013
0.013
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
. APPENDIX E
TRIBUTARY DATA
-------
STORET RETRIEVAL DATE: 76/oe/os
3009A1
48 32 02.0 107 31 21.0 4
NELSON CANAL
30 7.5 HEWITT LAKE
0/NEtSON SESEtfVOIR 090191
BP4K OFF SEC SO AlNo AT N TIP OF POOL
11EPALES 2111204
oooo FEET DEPTH CLASS oo
DATE
FROM
TO
74/10/05
74/11/03
74/12/08
75/01/04
75/02/02
75/02/2?
75/04/05
75/05/03
75/06/06
75/06/20
75/07/26
75/08/23
75/09/27
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
11
09
09
14
08
15
14
15
20
10
08
14
14
35
55
10
50
55
30
50
00
00
30
00
40
20
MG/L
0
0
0
0
0
0
0
0
0
0
0
0
0
.072
.104
.112
.104
.096
.104
.090
.115
.070
.085
.045
.005
.025
MG/L
1.850
1.200
1.500
1.000
1.300
0.575
1.400
3.750
1.650
1.300
3.450
1.700
2.600
00610 00671 00665
NH3-N PHOS-OIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
063
110
100
075
088
072
080
082
050
080
150
030
052
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
p
169
020
020
010
016
016
010
020
010
015
005
065
005
MG/L P
0
0
0
0
0
.173
.030
.030
.020
.020
0.040
0
0
0
0
0
0
0
.030
.090
.050
.030
.030
.070
.040
-------
STORET RETRIEVAL DATE 76/08/05
DATE TIME DEPTH N02&N03
FROM OF
TO DAY FEET
74/10/05 12 10
74/11/03 10 30
75/05/03 15 20
75/06/06 08 30
75/06/20 10 30
75/07/26 08 ?5
75/08/23 15 30
75/09/27 15 00
3009A2
48 27 35.0 107 37 50.0 4
NELSON CANAL
30 15 BOrfOOIN
T/NELSON RESERVOIR 090191
US H*Y 2 8RDG 13 MI W OF SACO
"11EPALES 2111204
0000 FEET DEPTH CLA5S 00
0630
&N03
OTAL
G/L
0.012
0.008
0.230
0.005
0.015
0.020
0.005
0.005
00625
TOT KJEL
N
MG/L
0.600
0.800
1.700
1.150
4.400
2.000
2.000
2.000
00610
NH3-N
TOTAL
MG/L
O.CIO
0.015
0.055
0.010
0.050
0.065
0.025
0.025
00671
PHOS-OIS
ORTHO
MG/L P
0.037
0.005
0.030
0.010
0.020
0.020
0.045
0.005
00665
PHOS-TOT
MG/L P
0.047
0.030
0.160
0.095
0.160
0.110
0.140
0.070
-------
STORE? RETRIEVAL DATE 76/08/05
DATE TIME DEPTH N02&N03
FROM OF
TO DAY FEET
74/10/05
74/11/03
74/13/08
75/01/04
75/03/02
75/02/22
75/04/05
75/05/03
75/06/06
75/06/20
75/07/26
75/08/23
75/09/27
11 45
10 15
09 15
14 55
09 00
15 45
15 00
15 10
20 15
10 30
08 10
14 50
14 30
300981
48 31 42.0 107 31 09.0 4
NELSON SOUTH CANAL
30 7.5 HEWITT LAKE
0/NELSON RESERVOIR 090191
BNK OFF SEC RD XING AT NE~TIP OF POOL
11EPALES 2111204
0000 FEET DEPTH CLASS 00
0630
&N03
OTAL
G/L
0.072
0.104
0.032
0.024
0.024
0.032
0.030
0.050
0.055
0.065
0.030
0.005
0.020
00625
TOT KJEL
N
HG/L
1.100
1.100
1.600
0.700
0.300
0.500
1.450
1.650
1.850
0.800
0.600
3.000
2.400
00610
NH3-N
TOTAL
MG/L
0.060
0.085
0.200
0.195
0.136
0.128
0.133
0.180
0.025
0.030
0.035
0.040
0.055
00671
PHOS-DIS
ORTHO
MG/L P
0.010
0.015
0.010
0.005
0.008K
0.008K
0.005
0.005
0.010
0.040
0.005K
0.020
0.005K
00665
PHOS-TOT
MG/L P
0.025
0.020
0.010
0.010K
0.010K
0.010
0.010K
0.008
0.020
0.040
0.020
0.060
0.040
K VALUE KNOWN TO BE
LESS THAN INDICATED
------- |