U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
LAKE LOWELL
CANYON COUNTY
IDAHO
EPA REGION X
WORKING PAPER No, 783
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
-------
REPORT
ON
LAKE LOWELL
CANYON COUNTY
IDAHO
EPA REGION X
WORKING PAPER No, 783
WITH THE COOPERATION OF THE
IDAHO DEPARTMENT OF HEALTH AND WELFARE
AND THE
IDAHO NATIONAL GUARD
JULY, 1977
-------
CONTENTS
Page
Foreword i i
List of Idaho Study Lakes iv
Lake and Drainage Area Map v
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 3
III. Lake Water Quality Summary 5
IV. Nutrient Loadings 11
V. Literature Reviewed 16
VI. Appendices 17
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11
FOREWORD
The National Eutrophicatlon 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, concen-
trations, 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 nonpoint source pollution abatement in lake water-
sheds.
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
watershed 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.
-------
TM
Beyond the single lake analysis, broader based correlations
between nutrient concentrations (and loading) and trophic condition
are being made to advance the rationale and data base for refine-
ment of nutrient water quality criteria for the Nation's freshwater
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 the U.S. Environmental Protection
Agency and to augment plans implementation by the states,
ACKNOWLEDGMENTS
The staff of the National Eutrophication Survey (Office of
Research and Development, U.S. Environmental Protection Agency)
expresses sincere appreciation to the Idaho Department of Health
and Welfare for professional involvement, to the Idaho National
Guard for conducting the tributary sampling phase of the Survey,
and to those Idaho wastewater treatment plant operators who pro-
vided effluent samples and flow data.
The staff of the State of Idaho Department of Health and
Welfare, Division of Environment, provided invaluable lake docu-
mentation and counsel during the Survey, reviewed the preliminary
reports and provided critiques most useful in the preparation of
this Working Paper Series.
Major General James S. Brooks, Adjutant General of Idaho, and
Project Officer Major Vestal L. Baker, who directed the volunteer
efforts of the Idaho National Guardsmen, are also gratefully
acknowledged for their assistance to the Survey.
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NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF IDAHO
LAKE NAME
American Falls Reservoir
Cascade Reservoir
Coeur d'Alene Lake
Dworshak Reservoir
Hauser Lake
Hayden Lake
Island Park Reservoir
Lake Lowell (Deer Flat Reservoir)
Magic Reservoir
Palisades Reservoir
Payette Lake
Lower Twin Lake
Upper Twin Lake
COUNTY
Bannock9 Binghams Power
Valley
Benewahj Kootenai
Clearwater
Kootenai
Kootenai
Fremont
Canyon
Blaines Camas
Bonnevilie (Lincoln in WY)
Valley
Kootenai
Kootenai
-------
LAKE LOWELL (DEER FLAT)
Tributary Sanpling Site
X La>:e Sa-Tipling Site
Land Subject to Inundation
-------
REPORT ON LAKE LOWELL, IDAHO
STORE! NO. 1608
I. CONCLUSIONS
A. Trophic Condition:*
Survey data indicate that Lake Lowell is eutrophic, i.e.',
nutrient rich and highly productive. Whether such nutrient
enrichment is to be considered beneficial or deleterious is
determined by its actual or potential impact upon designated
beneficial water uses of each lake.
Chlorophyll a_ values in the lake ranged from 16.0 yg/1
to 39.2 yg/1 with a mean of 25.4 yg/1. Potential for primary
productivity as measured by algal assay control yield was
moderate; however, it should be noted that significant nutrient
losses occurred in assay samples prior to analysis and the
results may not be representative of growth responses in the
lake. Of the 13 Idaho lakes sampled in 1975, only 1 had
higher median total phosphorus levels (0.070), 5 had higher
median inorganic nitrogen values (0.070), and 2 had higher
median orthophosphorus levels (0.015) than Lake Lowell.
Survey limnologists reported severe algal blooms and
macrophyte growths during August and September visits to the
lake.
*See Appendix E.
-------
B. Rate-Limiting Nutrient:
The algal assay results indicate that Lake Lowell was limited
by available phosphorus. Lake data suggest nitrogen limitation
during the spring (04/08/75) and summer (08/01/75) samplings and
phosphorus limitation during the fall (09/17/75).
C. Nutrient Controllability:
1. Point sources -
There were no known point sources impacting Lowell Lake
during the sampling year.
2
The present calculated phosphorus loading of C.8"; g P/m /yr
is greater than that proposed by Vollenweider (1975) as a
"eutrophic" loading. Unless the nonpoint phosphorus load can
be reduced, Lake Lowell can be expected to exhibit progressive
symptoms of eutr.ophi cation.
2. Nonpoint sources -
All of the phosphorus entering Lake Lowell apparently came
from nonpoint sources, primarily agricultural runoff into the
drainage canals. New York Canal contributed 91.8% of the total
phosphorus input into the lake and Unnamed Canal (C-l) contri-
buted 6.0%. A study of land use practices in the drainage area is
needed to determine whether any significant reduction of non-
point phosphorus inputs can be accomplished.
-------
II. LAKE AND DRAINAGE BASIN CHARACTERISTICS:
Lake and drainage basin characteristics are itemized below.
Lake surface area, mean depth and volume were provided by Martin
and Hanson (1966). Maximum depth was estimated on the basis of
National Eutrophication Survey (NES) data. Tributary flow data
were provided by the Idaho District Office of the U.S. Geological
Survey (USGS). Mean hydraulic retention time was obtained by
dividing the lake volume by mean flow of the outlet. Precipitation
values are estimated by methods as outlined in NES Working Paper
No. 175. A table of metric/English conversions is included in
Appendix A.
A. Lake Morphometry:
1. Surface area: 39.80 km .
2. Mean depth: 5.9 meters.
3. Maximum depth: 12.2 meters.
4. Volume: 234.486 x 106 m3.
5. Mean hydraulic retention time: 262 days.
-------
B. Tributary and Outlet:
(See Appendix B for flow data)
1. Tributaries -
Drainage, Mean flow
Name
L/luiiiu^^n i iwwi i i i wn
area (km )* (m^/sec)
C-l Unnamed Canal 0.42
D-l New York Canal 9.74
Minor tributaries and
immediate drainage -
Totals 10.16
2. Outlets -
A-l Deer Flat Low Line Canal 9.74
B-l Deer Flat at Nampa Canal 0.60
Totals 10.34
C. Precipitation:
1. Year of sampling: 29.4 cm.
2. Mean annual: 27.4 cm.
tributaries are canals with no associated drainage areas.
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III. LAKE WATER QUALITY SUMMARY
Lake Lowell was sampled three times during the open-water
season of 1975 by means of a pontoon-equipped Huey helicopter.
Each time, samples for physical and chemical parameters were
collected from three stations on the lake and from a number of
depths at each station (see map, page v). During each visit,
depth-integrated samples were collected from each station for
chlorophyll ^analysis and phytoplankton identification and
enumeration. During the first and last visits., 18.9-liter
depth-integrated samples were composited for algal assays. Maxi-
mum depths sampled were 4.3 meters at Station 01, 11.0 meters
at Station 02, and 7.3 meters at Station 03. For a more detailed
explanation of NES Methods, see NES Working Paper No. 175.
The results obtained are presented in full in Appendix C
and are summarized in III-A for waters at the surface and at the
maximum depth for each site. Results of the phytoplankton counts
and chlorophyll a_ determinations are included in III-B. Results
of the limiting nutrient study are presented in III-C.
-------
LA"F LOWELL
STOuET CODE l^Oft
PARA'-'ETE0
TE"P£=>ATUOE (OEP
O.-l .5 w r>EOTH
MAX DEPTH**
DIS<=01 VED OXYGEN
O.-l. 5 M DEPTH
VAX DF.PTH**
( 4/ 3/7t> )
S * * * = ~>
N« ^a-j'iE wFDTAfj
CF,iT>
6
i
(MR /I.)
6
3
4.6-
4.5-
11.0-
12.4-
4. A
*.6
13.0
13.0
4.6
4.6
13.0
l?.b
ix £ y
OEKT>-
"' A N fa F
(VETE
0.0-
4.3-
n.o-
4.3-
PHYSICAI AND CHEMICAL CHARACTERISTICS
( S/ 1X75 )
MAX
S*»* = 3 DEPTH
^ANGE
'^sj r^« PANGE MEDIAN IMETEHS)
l.D
11.0
1.5
11.0
6
3
6
3
17.7-
16.3-
7.4-
7.0-
20.7
17.7
15.0
'7.8
18.5
17.5
9.9
7.8
0.0-
4.0-
0.0-
4.0-
1.5
10.1
1.5
10.1
N»
6
3
6
3
( 9/16/75 1
«;•**« = 3
RANGE MEDIAN
17.1-
15.3-
6.2-
7.2-
20.7
17.4
10.4
9.5
18.8
16.8
8.9
7.4
1
MAX
DEPTH
RANGE
(METERS)
0.0-
3.0-
0.0-
3.0-
1.5
7.V
1.5
7.9
CONDUCTIVITY (I)MHOC>
O.-l. 5 M DEPTH
UAX DEPTH0*
Dfr (STANDARD UNIT
O.-l.1^ M DEr-TH
MAX DEPTH**
TOTAL ALKALINITY
O.-l .5 M DEPTH
MAX DEPTH**
TOTAL P (MO/L)
O.-l. 5 M DEPTH
'-'AX DEPTH**
DISSOLVED ORTHQ P
O.-l. 5 M DEPTH
MAX DEPTH*0
N0?+N03
O.-l.S M OFPTH
MAX DEPTH**
AMMONIA (MG/L^
O.-l. 5 M DEPTH
"AX DEPTH**
KJELDAHL N (MG/L)
O.-l.S " OE^TH
MAX DEPTH**
6
3
S)
6
3
6
3
6
1
(MG/L)
6
3
6
3
6
3
6
3
150.-
151 .-
8.8-
9.6-
86.-
85.-
0.041-0
0.049-0
0.006-0
0.019-0
0.0?0-0
0.020-0
0.030-0
0.030-0
0 .400-0
0.500-0
157.
155.
ft. 9
8.9
90.
90.
cOB9
.279
.027
.033
.030
.040
.050
.050
.600
.600
15?.
159.
B.9
8. ft
«R .
Sfl.
0 „ 0 4 1
0.049
0.019
0.030
0.0?0
O.O'O
0.030
0.040
0.5^-0
0 o 5 0 0
0.0-
4.3-
0.0-
4.3-
0.0-
4.3-
0.0-
4.3--
0.0"
4.3-
0.0-
4.3-
n.O-
4.3-
0.0-
4.3-
l.b
11.0
1.5
11.0
1.5
11.0
1 .5
11 .0
1.5
11.0
1 .5
11.0
1.5
11.0
1.5
11.0
6
3
6
3
6
3
6
3
6
3
6
3
6
3
6
3
197.-
195,-.
9.0-
8.7-
8? o "
86,-
0.068-0
0.053-0
Oo010-0
0.012-0
0.020-0
0.020-0
0.030-0
0.070-0
0.700-1
0.600-0
203.
208.
906
9.3
92.
91.
.174
.083
.033
.021
.020
oO«.0
.070
.130
.500
.700
200.
204.
9.4
9.2
87.
90.
0.080
Oo058
0.023
0.019
0.020
0.030
0.040
0.120
0.800
0.600
0.0-
4.0-
0.0-
4.0-
0.0-
4.0-
0.0-
4.0-
0.0-
4.0-
0.0-
4.0-
0.0-
4.0-
0,0-
4.0-
1.5
10.1
1.5
10.1
1.5
lOol
1.5
10.1
1.5
10.1
1=5
10,1
1.5
10.1
1.5
10.1
6
3
6
3
6
3
f.
3
6
3
&
3
6
3
&
3
2470-
241.-
8.7-
8,8-
96.-
97.-
Oo065-0
Oo073-=0
0.008-0
0.009-0
Oo020->0
0,020-0
0,030=0
0.040-0
0.500-0
0.500-0
301.
345.
9.3
9.3
111.
130o
.096
.096
.013
.013
.200
S400
.080
.060
.800
.800
284.
30?.
9.1
9<,2
105.
121.
0.080
Oo08«.
OcOlO
0.010
0.100
0.100
00050
Oo040
0.650
0,800
0,0-
3.0-
0.0-
3oO =
0,0 =
3.0-
0,0-
3.0-
0.0-
3cO-
OoO-
3,0-
OcO»
3,0-
0.0-
3.0-
US
7.9
1.5
7,9
U5
709
1.5
709
U5
7c9
1 = 5
7,9
Io5
7.9
1.5
7.9
DISC
o.-- 1.1
n.s
o.l- 0.6
0 .h
3 0.3- 0.6
0,6
* N = NO, OF Si
** MAXIMUM DEPTH SAILED AT FACH SITE
*»* s = NO. OF STTES SAMPLED ON THIS DATE
-------
B. Biological Characteristics:
1. Phytoplankton -
Sampling
Date
04/08/75
08/01/75
09/16/75
Dominant
Genera
1. Fragilaria
2. Asterionella
3. Melosira
4. Stephanodiscus
5. Synedra
Other genera
Total
1. Apham'zomenon
2. MeTosira
3. Fragilaria
4. Stephanodiscus
5. Chroomonas
Other genera
Total
1. Melosira
2. Aphani zomenon
3. Ankistrodesmus
4. Cosmarium
5. Oocystis
Other genera
Total
Algal
Units
per ml
9,120
5,267
636
600
141
390
16,154
59622
861
208
124
84
306
7,205
5,126
267
160
107
107
107
5,874
-------
2. Chlorophyll a. -
Sampling Station Chlorophyll
Date Number (yg/1)
04/08/75 01 28.1
02 ' 26.8
03 25.9
08/01/75 01 28.3
02 25.4
03 20.9
09/16/75 01 39.2
02 17.9
03 16.0
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C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked -
a. 04/08/75
Spike (mg/1)
Control
0.05 P
0.05 P + 1.0 N
1.00 N
09/16/75
Ortho P
Cone, (mg/1)
0.010
0.060
0.060
0.010
Spike (mg/1)
Control
0.05 P
0.05 P + 1.0 N
1.00 N
Ortho P
Cone, (mq/1)
0.020
0.070
0.070
0.020
Inorganic N
Cone, (mg/1)
0.072
0.072
1.072
1.072
Inorganic N
Cone, (mg/1)
0.425
0.425
1.425
1.425
Maximum Yield
(mg/1-dry wt.)
0.4
2.3
7.8
0.4
Maximum Yield
(mg/1-dry wt.)
1.0
14.6
18.6
1.0
-------
10
2. Discussion -
The control yields of the assay alga, Selenastrum capri-
cornutum, indicate that the potential for primary production in
Lake Lowell was moderate at the times of assay sample collection
(04/08/75; 09/16/75). In both assays, addition of phosphorus
alone and in combination with nitrogen caused a significant
increase in yield over that of the control, indicating phosphorus
limitation. The addition of nitrogen alone did not result in an
increase over that of the control. However, it should be noted
that there were substantial changes in nutrient levels between
the collection and assay of the water samples. Therefore, the
assay may not accurately reflect the nutrient limitation situation
in the lake at the time of collection.
The mean inorganic nitrogen to orthophosphorus (N/P) ratios
in the lake data were 3/1, 4/1, and 20/1 in the spring, summer,
and fall respectively, suggesting nitrogen limitation in the spring
and summer and phosphorus limitation in the fall (a mean N/P ratio
of 14/1 or greater generally reflects phosphorus limitation).
-------
n
IV. NUTRIENT LOADINGS
(See Appendix D for data)
For the determination of nutrient loadings, the Idaho 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 months of June and July when two samples were collected. Samp-
ling 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 Idaho District Office of the USGS for the tributary sites nearest
the lake.
In this report, nutrient loads for sampled tributaries were
determined by using a modification of a USGS computer program for
calculating stream loadings. Nutrient loads indicated for tributaries
are those measured minus known point source loads, if any.
-------
12
A. Waste Sources:
1. Known municipal - None
2. Known industrial - None
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
% of
Source kg P/yr total
a. Tributaries (nonpoint load) -
C-l Unnamed Canal 1,925 6.0
D-l New York Canal 29,470 91.8
b. Minor tributaries and immediate
drainage (nonpoint load) -
c. Known municipal STP's - None
d. Septic tanks* - 10 <0.1
e. Known industrial - None
f. Direct precipitation** - 695 2.2
Totals 32,100 100.0%
2. Outputs -
A-l Deer Flat Low Line Canal 15,780
B-l Deer Flat Nampa Canal 2,415
Totals 18,195
3. Net annual P accumulation - 13,905
*Estimate based on 32 lakeshore residences.
**Estimated (See NES Working Paper No. 175).
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13
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
% of
Source kg N/yr total
a. Tributaries (nonpoint load) -
C-l Unnamed Canal 42,530 15.1
D-l New York Canal 196,660 69.6
b. Minor tributaries and immediate
drainage (nonpoint load) -
c. Known municipal STP's - None
d. Septic tanks* - 340 0.1
e. Known industrial - None
f. Direct precipitation** - 42.970 15.2
Totals 282,500 100.0%
2. Outputs -
A-l Deer Flat Low Line Canal 275,170
B-l Deer Flat Nampa Canal 29,330
Totals 304,500
3. Net annual N export*** - 22,000
*Estimate based on 32 lakeshore residences.
**Estimated (See NES Working Paper No. 175).
***Export probably due to unknown sources and/or sampling error.
-------
14
D. Mean Nutrient Concentrations in Ungaged Streams:
Mean Total P Mean Total
Tributary (mg/1) (mg/1)
E-l Unnamed Canal <0.083 1.806
-------
15
E. Yearly Loadings:
In the following table, the existing phosphorus loading is
compared to the relationship proposed by Vollenweider (1975).
Essentially, his "eutrophic" loading is that at which the receiving
waters would become eutrophic or remain eutrophic; his "oligotrophic"
loading is that which would result in the receiving water remaining
oligotrophic or becoming oligotrophic if morphometry permitted.
A "mesotrophic" loading would be considered one between "eutrophic"
and "oligotrophic."
Note that Vollenweider's model may not be applicable to water
bodies with very short retention times or in which light penetration
is severely restricted from high concentrations of suspended solids
in the surface waters.
Total Yearly
Phosphorus Loading
(g/m?/yr)
Estimated loading for Lake Lowell 0.81
Vollenweider's "eutrophic" loading 0.56
Vollenwieder's "oligotrophic" loading 0.28
-------
16
V. LITERATURE
Martin, R.O.R. and Ronald L. Hanson. 1966. Reservoirs in the U.S.
Geological Survey Water Supply, Paper No. 1838. U.S. Government
Printing Office, Washington, D.C.
U.S. Environmental Protection Agency. 1965. National Eutrophica-
tion Survey Methods 1973-1976. Working Paper No. 175. National
Environmental Research Center, Las Vegas, Nevada, and Pacific
Northwest Environmental Research Laboratory, Corvallis, Oregon.
Vollenweider, R. A. 1975. Input-Output Models With Special
Reference to the Phosphorus Loading Concept in Limnology.
Schweiz. Z. Hydro!. 37:53-84.
-------
17
VI. APPENDICES
APPENDIX A
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 B
TRIBUTARY FLOW DATA
-------
TRI3UTA&Y FLOW INFORMATION FOR IDAHO
LAKE CODE 1608 LAKE LOWELL
TOTAL DRAINAGE AREA OF LAKF
OP./23/76
n.o
SUB-DRAINAGE
TRIBUTARY AREAtSG KM)
NORMALIZED FLOWS(CMS)
1 ft 0 * 4 1
1608C1
160P01
160977
0.0
0.0
n.o
o.o
JAN
"I. 11 3
0.0
0.0
4.67
0.0
FEB
0.057
0.0
0.0
10.36
0.0
MAP
0 . 5 6 6
0.0
0.0
7.05
0.0
APR
i 0 . 5 0 6
0.31 1
0.283
17.81
0.0
MAY
18.916
1.21P
0.765
16.79
0.0
JUN
21.7*7
1.303
0.963
17.33
0.0
JUL AUG
25.117 22.087 1
1.812 1.586
1.189 1.189
9.29 8.21
0.0 0.0
S.EP
2.205
0.765
0.566
14.72
0.0
OCT
4.36!
0.085
0.085
6.88
0.0
NOV
0.255
0.0
0.0
0.74
0.0
DEC
0*142
0.0
0.0
3.45
0.0
MEAN
0^595
0.423
9.74
n.o
SUMMARr
TOTAL
SUM OF
DRAINAGE AREA OF LAKE =
SUB-DRAINAGE AREAS =
0.
n.
0
0
TOTAL FLOW
TOTAL FLOW
IN =
OUT =
0.0
245.51
MEAN MONTHLY FLOWS AND DAILY FLOWS
TRIBUTARY
1608A1
MONTH
YE AD
MEAN FLOW DAY
FLOW DAY
FLOW DAY
FLO»
1608B1
10
11
12
1
2
3
4
5
^
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
0.0
0.0
0.0
0.0
0.0
0.0
3.964
19.086
21.80*
26.590
22.399
15.801
0.0
0.0
0.0
0.0
0.0
0.0
0.051
0.521
1.056
1.382
1.017
0.674
2P
17
14
19
16
16
19
16
6
11
17
14
20
17
14
19
16
If
10
16
6
11
17
14
0.0
0.0
0.0
0.0
0.0
0.0
6.796
22.880
22.512 27
28.175 27
25.344
16.367
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.821
1.076 27
1.472 25
1.331
0.765
16.367
24.636
0.793
1 . 246
-------
TRIBUTARY FLOW INFORMATION FOR IDAHO 08/33/76
LAKE CODE 1608 LAKE LOWFLL .
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY FLOW DAY FLOW DAY FLOW
1608C1 10 74
11 74
12 74
1 75
2 75
3 75
4 75
5 75
6 75
7 75 1.366 11 1.642 12 1.784 25 1.0*8
8 75
9 75
1608D1 10 74
11 74
12 74
1 75
2 75
3 75
4 75
5 75
6 75
7 75
8 75
9 75
0.088
0.0
0.0
0.0
0.0
0.0
0.088
0.660
1.110
1.266
1.119
0.660
17.273
10.336
0.0
0.0
3.341
13.960
15.263
16.254
18.349
11.497
8.523
12.799
20
17
14
19
16
16
19
16
6
11
17
14
20
17
14
10
16
16
19
16
6
11
17
14
0.0
0.0
0.0
0.0
0.0
0.0
0.0
1.133
0.991 27
1.642 12
1.076
0.311
0.0
29.308
0.0
0.0
0.0
27.467
28.600
18.944
20.388 27
7.249 25
8.184
7.759
1.104
1.784
20.303
11.412
-------
APPENDIX C
PHYSICAL AND CHEMICAL DATA
-------
STORET RETRIEVAL DATE
N'ATL EUTROPHICATIO^ SURVEV
EPA-LAS VEGAS
160801
43 32 01.0 116 37 23.0 3
LAKE LOWELL
16027 IDAHO
130791
11EPALES 211
0018 FEET DEPTH CLASS
DATE
FPQM
TO
75/04/08
75/08/01
75/09/16
DATE
FROM
TO
75/04/OR
75/08/01
75/09/16
TIME DEPTH
OF
DAY
10
10
10
10
18
18
IB
14
14
14
FEET
35 0000
35 0005
35 0010
35 0014
15 0000
15 0005
15 0013
15 0000
15 0005
15 0010
TIME DEPTH
OF
DAY
10
10
10
10
18
18
18
14
14
14
FEET
35 0000
35 0005
35 0010
35 0014
15 0000
15 0005
15 0013
15 0000
15 0005
15 0010
00010
•WATER
TEMP
CENT
4.6
4.6
4.5
4.6
20.7
18.5
17.7
17.8
17.1
16.8
00665
PHOS-TOT
MG/L P
0.041
0.044
0.047
0.049
0.174
0.072
0.058
0.080
0.081
0.073
00300
DO
MG/L
11.
13.
13.
12.
15.
8.
7.
9.
6.
7.
32217
0
0
0
8
0
2
8
0
2
2
CHLRPHYL
A
UG/L
28.
28.
39.
1
3
2
00077 00094
TRANSP CNDUCTVY
CECCHI FIELD
INCHES MICROMHO
42 151
150
150
151
4 203
203
195
24 301
301
345
00031
IMCDT LT
REMNING
PERCENT
00400
PH
SLl
8.80
8.80
8.80
8.80
9.60
9.40
9.35
8.70
8.70
&.80
00410
T ALK
CAC03
MG/L
88
87
89
88
82
85
86
108
111
121
00610
NH3-N
TOTAL
MG/L
0.030
0.030
0.030
O.Q30
0.040
0.040
0.070
0.030
0.080
0.040
1202
OC
00625
TOT
N
KJEL
MG/L
0
0
0
0
1
0
0
0
0
0
.600
.600
.600
.500
.500
.800
.600
.500
.600
.500
00630 00671
N02&N03 PHOS-DIS
N-TOTAL ORTHO
MG/L
0.030
0.020K
0.020K
0.040
0.020K
0.020K
0.020
0.180
0.200
0.400
0.025
0.027
0.015
0.030
0.020
0.026
0.0.19
0.011
0.008
0.009
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STO°ET RETRIEVAL OflTB 76/nq/>5
NATL EUTROPHICATIOH SURVEY
EPA-LAS VEGAS
DATE
FROM
TO
TIME DEPTH
OF
DAY FEET
75/04/0* 11 00 0000
11 00 0005
11 00 0015
11 00 0036
75/08/01 18 45 0000
18 45 0005
18 45 0015
18 45 0033
75/09/16 14 40 0000
14 40 0005
14 40 0015
14 40 0026
onoio
TEMP
CENT
4.7
4.7
4.6
18.5
17.7
17.5
16.3
19.9
18.3
15.9
15.3
16-0802
43 33 22..0 116 39 22.0 3
LAKE LOWELL
16027 IDAHO
130791
11EPALES
211
C040 FEET DEPTH CLASS
00300
DO
MG/L
13.0
12.6
12.6
12.4
12.2
8.0
7.8
7.0
10.4
8.8
0.4
7.4
00077
TRANSP
<=ECCHI
INCHES
36
22
24
00094
CNOUCTVY
FIELD
MICHOMHO
152
152
152
152
200
200
197
208
286
281
307
302
00400
PH
Stl
8.90
8.90
8.80
8.80
9.45
9.40
9.30
9.20
9.25
9.15
8.10
9.20
00410
T ALK
C«C03
MG/L
87
86
85
85
87
89
90
91
103
106
125
130
00610
NH3-N
TOTAL
MG/L
0.030
0.040
0.040
0.050
0.030
0..050
0,060
0.130
0.040
0.060
0.520
0.060
1202
on
00625
TOT KJFCL
N
MG/L
0.600
0.500
0.500
0.600
1.300
0.800
0.500
0.700
O.«00
0.600
0.900
0.800
00630 00671
N02&N03 PHOS-OIS
M-TOTAL OPTHO
MG/L MG/L °
0.020
0.020K
0.020K
0.0.20K
0..020
0.020
0.030
0.040
0.100
0.100
O.?60
0.100
0.02?
0.006
0.022
0.019
0.010
0.012
0.016
0.021
0.009
0.010
0.031
0.010
DATE TIME DEPTH
FROM OF
TO DAY FEET
75/04/08 11 00 0000
11 00 0005
11 00 0015
11 00 0036
75/08/01 18 45 0000
18 45 0005
18 45 0015
18 45 0033
75/09/16 14 40 0000
14 40 0005
14 40 0015
14 40 0026
'0665
iS-TOT
i/L P
0.048
0.050
0.063
0.279
0.127
0.068
0.049
0.083
0.084
0.065
0.095
0.096
32217
CHLRPHYL
A
UG/L
26.8
25.4
17.9
00031
INCOT LT
PFMNING
PERCENT
R VALUE KNOWN TO BE LESS
THAN INDICATED
-------
PETPjEv/iL OATE
NATL
EPA-LAS VEGAS
160803
43 35 03.0 116 43 40.0 3
LAKE LOWELL
16027 IDAHO
1307Q1
11EPALES 2111202
0027 FEET DEPTH CLASS 00
DATE
F30W
TO
75/04/08
75/08/01
75/09/16
DATE
FROM
TO
75/04/08
75/08/01
75/09/16
TIME
OF
DEPTH
DAY FEET
11 25
11 25
11 25
11 25
19 20
19 20
19 20
15 05
15 05
15 05
TIME
OF
DAY
11 25
11 25
11 25
11 25
19 20
19 20
19 20
15 05
15 05
15 05
0000
"005
0015
0024
0000
0005
0016
0000
0005
0011
DEPTH
FEET
0000
0005
0015
0024
0000
0005
0016
0000
0005
0011
00010
WATE3
TEMP
CENT
4.6
4.6
4.5
4.5
18.7
17.9
17.5
20.7
19.3
17.4
00665
PHOS-TOT
MG/L P
0.059
0.055
0.053
0.049
0.088
0.073
0.053
0.074
0.096
0.084
00300
DO
MG/L
13.
13.
12.
13.
11.
7.
7.
9.
8.
9.
32217
00077 00094
TRANSP CNDUCTVY
<;ECCHT FIELD
INCHES MICPOMHO
0 18
0
8
0
6 24
4
8
8 12
1
5
00031
157
157
156
155
197
199
204
258
247
241
00400 00410
PH T ALK
CAC03
Stl
8
8
8
P
9
9
8
9
9
9
.90
.90
.85
.90
.65
.00
.70
.10
.15
.30
MG/L
90
90
91
90
87
92
90
103
96
97
00610 00625
NH3-N TOT KJEL
TOTAL N
MG/L
0.050
0.030
0.040
0.040
0.040
0.070
0.120
0.070
0.030
0.040
MG/L
0.400
0.400
0.600
o.soo
0.700
0.700
0.600
0.700
0.800
0.800
CHLRPHYL INCDT LT
A
UG/L
25.
20.
16.
PFMNING
PERCENT
9
9
0
00630 00671
N02S.N03 PHOS-DIS
N-TOTAL ORTnO
MG/L MG/L P
0.020
0.020*
0.020K
0.020K
0.020K
0.020
0.030
0.100
0.020K
0.020K
0.010
0.016
0.011
0.033
0.033
0.033
0.012
0.013
0.011
0.013
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
APPENDIX D
TRIBUTARY AND WASTEWATER
TREATMENT PLANT DATA
-------
STORET RETRIEVAL DATE 76/08/25
MATt F.UTROPHICATION SURVEY
EPA- LAS VEGAS
1608A1
43 35 22.0 lift 44 42.0 4
DEER FLT LOW LINE CANAL
16 7.5 LAKE LOWELL
0/LAKE LOWELL 1307Q1
HOOOLEY 90 RRDG 1.6 MI Sw OF HWY 55
11EPALES 2111304
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
75/35/16
75/06/06
75/06/27
75/07/11
75/07/27
75/08/17
75/09/14
TIME DEPTH
OF
OAY FEET
16 00
16 30
16 05
15 05
15 30
15 37
15 42
00630
NO?(sN03
N-TOTAL
MG/L
0.005
3.600
0.105
0.195
0.105
0.155
0.230
006?5
TOT KJEL
N
MG/L
0.700
0.550
0.650
0.400
0.150
0.200
0.400
00610
NH3-N
TOTAL
MG/L
0.020
0.050
0.025
0.017
0.035
0.010
0.010
00671
PHOS-OIS
ORTHO
MG/L P
0.015
0.050
0.025
0.075
0.035
0.035
0.060
00665
PHOS-TOT
MG/L P
0.050
0.060
0.030
0.100
0.050
0.060
0.070
-------
STCPET RETRIEVAL 0-ATE .7e/op/?5
NATL EUTROPHICATION SURVEY
EPA- LAS VEGA?
DATE TIME PERT* N02S.N03
FROM OF
TO DAY FEET
75/05/16 16 35
75/06/06 16 00
75/06/27 16 35
75/07/11 16 10
75/07/25 16 10
75/08/17 15 05
75/09/14 13 05
1608B1
43 33 40.0 116 38 52.0 4
DEER FLT AT NAMPA CANAL
16 7.5 LAKE LOWELL
0/LAKE LOWELL 1307Q1
LK LOWELL AVE 5.2 MI SE OF QFaTH CORNER
11EPALES 2111204
0000 FEET DEPTH CLASS 00
0630
S.N03
OTAL
G/L
0.005
3.700
0.110
0.3RO
0.105
0.155
0.440
00635
TOT KJEL
N
MG/L
0.450
0.400
0.350
0.600
0.200
0.200
0.400
00610
MH3-N
TOTAL
MG/L
0.015
0.060
0.010
0.030
0.025
0.010
0.010
00671
PHOS-DIS
ORTHO
MG/L P
0.010
0.045
0.030
0.110
0.035
0.035
0.120
00665
PHOS-TOT
MG/L P
0.030
0.060
0.030
0.170
0.050
0.060
0.150
-------
STQPET RETRIEVAL DATE 76/08/25
NATL FUTPOPHICATION ?URVEY
EPA- |_AS VEGAS
1608C1
43 31 27.0 116 38 04.0 4
UNNAMED CANAL
16 7.5 LAKE LO*ELL
T/LAKE LOWELL 1307Q1
LK SHORE DPV EtRDG 4 MI SE OF LKVIEw SCK
11EPALES 2111204
0000 FEET DEPTH CLASS 00
DATE
FRQM
TO
74/10/20
75/04/19
7?/05/16
75/06/06
75/06/27
75/07/11
75/07/12
75/07/25
75/08/17
75/09/14
TIME DEPTH
OF
DAY FEET
14 10
n9 45
14 30
14 30
15 10
13 55
14 00
14 32
14 05
14 52
00*30
00625
N02sN03 TOT KJEL
N-TOTAL
MG/L
0.008
0.360
0.140
0.390
0.250
3.450
4.000
0.145
3.300
0.230
N
MG/L
0.200
1.250
0.600
0.500
0.400
0.500
1 .300
0.250
0.550
0.300
00610
NH3-M
TOTAL
MG/L
0.015
0.035
0.015
0.025
0.005K
0.095
0.135
0.015
0.075
0.015
00671
PHOS-DIS
ORTHO
VG/L P
0.005
0.015
0.035
0.060
0.045
0.070
0.010
0.025
0.060
0.065
00665
PHOS-TOT
MG/L P
0.010
0.030
0.100
0.100
0.080
0.075
0.030
0.040
0.080
0.070
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STOPET RETRIEVAL DATE 76/0«/25
MATl. FUTPQPHICATIO* SURVF.V
EPA- LAS VEGAS
160001
43 30 36.0 116 34 44.0 4
NEb YORK CANAL
16 7.5 NAMPA
T/LAKE LOWELL
LK SHORE DRV BRDG .3 MI
11EPALES
0000 FEET DEPTH
130791
K OF H»Y 45
2111204
CLASS 00
DATE
TO
74/10/20
74/11/17
75/03/16
75/04/19
75/05/16
75/06/06
75/06/27
75/07/11
75/07/25
75/08/17
75/09/14
00630 00625
TIME DEPTH N02S.N03 TOT KjEL
OF N-TOTAL N
DAY FF.ET
13
14
09
08
13
14
13
13
13
13
12
10
00
30
45
35
05
35
05
20
15
35
MG/L
1.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
160
192
105
170
170
130
110
360
105
170
250
MG/L
0.
0.
0.
0.
1.
0.
0.
0.
0.
0.
0.
500
200
250
600
750
300
350
700
250
250
300
00610 00671 00665
NN3-N PHOS-DIS PHOS-TOT
TOTAL ORTHQ
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
020
025
015
020
025
030
010
035
020
020
010
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
P
025
015
005K
010
055
036
035
110
045
050
065
MG/L P
0.025
0.030
0.020
0.040
0.140
0.070
0.070
0.190
0.080
0.060
0.070
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
RETOIEVAL DATE 76/0»/25
NATL FUTROPnlCATIO* SURVEY
EPA- LAS VEGAS
DATE
FROM
TO
74/10/20
74/11/17
75/03/16
75/04/19
75/05/16
75/06/06-
75/06/27
75/07/11
75/07/25
75/08/17
75/09/14
TIME
OF
HAV
13
13
09
09
13
13
13
13
13
12
12
40
1^
10
05
15
45
20
30
10
55
£0
FEET
160RD2
43 30 33.0 116 34 35.0 4
NEw YORK CANAL
16 7.5 NAMPA
T/L&«E LOHFLL 130791
RNK FRM DRT «D 3.2 MI S OF NAMPA
11EPALES 3111204
0000 FEET DEPTH CLASS 00
0630
-------
STO"ET RETRIEVAL DATE 76/08/25
MATL FUTP.OPHICATION SURVEY
EPA- LAS VEGAS
1608E1
43 34 02.0 116 44 30.0 4
UNNAMED CANAL
16 7.5 LAKE LOWELL
T/LAKE LOWELL 1307Q1
BNK FRM LKSHORE DR 3.5 MI NW LKVIFw SCHL
11EPALES ?111?04
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
74/10/20
75/04/19
75/05/16
75/06/06
75/06/27
75/07/11
75/07/25
75/08/17
75/09/14
00630
TIME DEPTH N02iiN03
OF
DAY
14
10
15
15
14
14
14
14
14
FEET
45
15
15
10
20
23
57
45
3"
N-TOTAL
MG/L
0.024
0.175
0.155
0.115
3.300
0.525
3.300
0.060
3.300
00625
TOT KJEL
N
MG/L
0.400
0.650
1.050
0.200
0.900
0.500
O.SOO
0.250
0.850
00610
NH3-N
TOTAL
MG/L
0.025
0.010
0.017
0.015
0.075
0.020
0.0<50
0.025
0.075
00671
PhOS-DIS
ORTHO
MG/L P
0.005
0.035
0.008
0.031
0.065
0.115
0.070
0.055
0.090
00665
PHOS-TOT
MG/L P
0.010
-0.170
OoOlOK
0.060
0.080
0.170
0.070
0.090
0.090
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
APPENDIX E
PARAMETRIC RANKINGS OF LAKES
SAMPLED BY NES IN 1975
STATE OF IDAHO
Mean or median values for six of the key parameters evaluated
in establishing the trophic conditions of Idaho lakes sampled are
presented to allow direct comparison of the ranking9 by parameter,
of each lake relative to the others. Median total phosphorus,, median
inorganic nitrogen and median dissolved orthophosphorus levels are
expressed in mg/1. Chlorophyll a_ values are expressed in yg/1.
To maintain consistent rank order with the preceding parameters,
the mean Secchi disc depth9 in inches, is subtracted from 500.
Similarlys minimum dissolved oxygen values are subtracted from 15
to create table entries.
-------
LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
1601 AMERICAN FALLS RESERVOIR
1602 CASCADE LAKE
1603 LAKE COEUR D'ALENE
1604 DWORSHAK RESERVOIR
1605 HAUSER
1606 HAYDEN LAKE
1607 ISLAND PARK RESERVOIR
1608 LAKE LOWELL
1609 MAGIC RESERVOIR
1610 PALISADES RESERVOIR
1611 LOtfER PAYETTE
1612 LOWER TWIN LAKES
1613 UPPER TWIN LAKES
MEDIAN
TOTAL P
0*105
Oc032
©00I7
o.oie
©0028
OoOIg
0o©34
"Os ©7©
Oo062
0o©24
©9013
©o©U
©0017
MEDIAN 500~
INORG N MEAN SEC
Oe©80 463.800
0«060 415.067
Oc©40 3800348
60680 4010866
00075 366028G
0e©4© 243.500
00©50 391.778
©8o7e «77 ,m
0ol30 400o750
00©8© 34S0428
0e©6© 234e0@©
0o©5@ 37©o0@©
00©45 369oi^3
MEAN
CHLORA
15.379
8.081
16.391
2.420 .
lloliS
2«787
9»322
250389
7o322
2.067
4o6@§
2o3J8
4.986
15-
MIN 00
14.700
14.800
12.200
7.400
14o800 '
1U800
12.800
14.600
14.700
12^800
9o60©
13o600
8o200
MEDI;
OISS ORTI
0.035
0.009
@o005
0*009
000i3
0e003
©eoi2
00015
0c020
0.007
©0©07
0.009
Oe>004
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PERCENT OF LAKES WITH HIGHER VALUES (DUMBER OF LAKES WITH HIGHER VALUES)
LAKE
CODE LAKE NAME
1601 AMERICAN FALLS RESERVOIR
1602 CASCADE LAKE
1603 LAKE COEUR D'ALENE
1604 OwfOWSHAK RESERVOIR
1605 MAUSER
16©fc NAYDEN LAKE
1607 ISLAND PARK RESERVOIR
1608 LAKE LOWELL
1609 MAGIC RESERVOIR
161© PALISADES RESERVOIR
1611 LOWER PAYETTE
1612 LOWER TOIN LAKES
1613 UPPER TWIN LAKES
MEDIAN
TOTAL P
e c
33 C
67 i
96 C
42 (
96' i
25 1
8 (
17 C
50 (
83 <
75 C
58 (
0)
4)
8>
11)
S)
111
3)
1»
2)
6*
10)
9)
7)
MEDIAN 500- MEAN 15-
INORG H MEAN SEC CHLORA MIN DO
17 <
54 <
96 «
17 .<
33 C
96 C
71 C
42 «
0 «
17 t
54 (
71 (
83 <
1)
6)
11)
1>
4)
11)
8)
5>
©)
1).
&)
m .
i©)
8 (' 1) . 8 ( 1> 21 ( 2)
17 C 2) 4g « 5) 4 ( 0)
SQ « 6) 25 C 3) 67 ( 8)
25 ( 3) 83 ( 10) 106 C 1%)
75 C 9) 17 ( 2» . 4 { 6)
92 ( 111 15 t 91' . 7S C 9)
42 C SS 33 < 41 54 C 6>
0 C ©S © ( @J 33 C 4)
33 < 4) S© 46) 21 4 2*
83 C 10) ' !©@ ( 12J> 54 « 6S
10a < 12> 67 C 8) S3 < 10)
SB C 7J 92 C IU 42 i S)
67 (8) 58 C 71 9g 1 li>
MEDIAN
PISS ORTHO
0
SO
83
50
25
100
33
17
8
75
67
SO
92
( 0)
( 5)
( 10)
C 5)
i 3)
C 12)
( 4)
{ 2)
< 1)
( 9)
4 §)
( 5)
C il>
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