U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
COEUR D'ALENE LAI€
BBEWAH AND KDOTENAI COUNTIES
IDAHO
EPA REGION X
WORKING PAPER No, 778
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
•&G.P.O. 699-440
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REPORT
ON
COEUR D'ALENE LAKE
BENEWAH AND KDOTENAI COUNTIES
IDAHO
EPA REGION X
WORKING PAPER No, 778
WITH THE COOPERATION OF THE
IDAHO DEPARTMENT OF HEALTH AND WELFARE
AND THE
IDAHO NATIONAL GUARD
JULY, 1977
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REPORT ON COEUR D’ALENE LAKE
BENEWAH AND KOOTENAI COUNTIES, IDAHO
EPA REGION X
by
National Eutrophication Survey
Water and Land Quality Branch
Monitoring Operations Division
Environmental Monitoring & Support Laboratory
Las Vegas, Nevada
and
Special Studies Branch
Corvallis Environmental Research Laboratory
Corvallis, Oregon
Working Paper No. 778
OFFICE OF RESEARCH AND DEVELOPMENT
U.S. ENVIRONMENTAL PROTECTION AGENCY
July 1977
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I
CONTENTS
Page
Foreword ii
List of Idaho Study Lakes iv
Lake and Drainage Area Map v
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 5
III. Lake Water Quality Sumary 7
IV. Nutrient Loadings 12
V. Literature Reviewed 19
VI. Appendices 20
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ii
FOREWORD
The National Eutrophication Survey was Initiated in 1972 in
response to an Administration comitment 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
lannin9 [ 3O3(e)], water qualit,y criteria/standards review
L 3O3(c)], clean lakes [ 3l4(a,bfl, and water quality monitoring
[ lO6 and §305(b)] activities mandated by the Federal Water
Pollution Control Act Amendments of 1972.
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1•11
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 treatcrient 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 Vesta 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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lv
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF IDAHO
LAKE NAME COUNTY
American Falls Reservoir Bannock, Bingham, Power
Cascade Reservoir Valley
Coeur d’Alene Lake Benewah, Kootenai
Dworshak Reservoir Clearwater
Hauser Lake Kootenai
Hayden Lake Kootenai
Island Park Reservoir Fremont
Lake Lowell (Deer Flat Reservoir) Canyon
Magic Reservoir Blame, Camas
Palisades Reservoir Bonneville (Lincoln in WY)
Payette Lake Valley
Lower Twin Lake Kootenai
Upper Twin Lake Kootenai
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SPOA ,
C)
ii ‘o
COEUR D’ALENE LAKE
0 Trib t r S3rplinj Site
x L e Sa’ pl i r. S
Sc. ge Tr aUrert Facilit
— Drair age Arc [ oundary
0 20 30
t - - - J
o 10 2OM .
Scale
r — - - -- - ——— -
p
1160 C,
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REPORT ON COEUR D’ALENE LAKE, IDAHO
STORET NO. 1603
I. CONCLUSIONS
A. Trophic Condition:*
On the basis of Survey data and field observations Coeur
d’Aiene Lake is considered mesotrophic. Chlorophyll a values
in the lake ranged from 1.9 pg/i to 32.1 pg/i with a mean of
10.4 pg/i. Oxygen levels remained high in the lake throughout
the sampling year, and Secchi disc visibility was good except
during spring runoff at the southernmost stations of the lake.
Of the 13 Idaho lakes sampled during 1975, 8 had higher median
total phosphorus levels (0.017 mg/i), 11 had higher median
inorganic nitrogen values (0.040 mq/1) and 10 had higher median
total phosphorus levels (0.005 mg/i) than Coeur d’Aiene Lake.
Survey limnologists did not observe any problem conditions
during tneir visits to the lake. However, Parker (1972) reports
that blue-green algal growths and abundant macrophytes can be
found in the shallower southernmost portions of the lake. He
indicates that the deeper northern end acts as a semi-permanent
nutrient sink and is generally considered oligotrophic in
water quality, with a tendency towards eutrophication found
in the shallow, well-developed southern end. Survey data tends
*See Appendix E.
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2
to support this theory of overenrichment in the southern lake;
during the spring sampling period, the mean total phosphorus level
for Stations 01-03 was 0.025 mg/i, and for Stations 05-08 was 0.049
mg/i. Overenrichment in the lake is apparently a result of heavy
recreational use, development of lakeshore residences and resorts
around the lake and flush sewage from boats utilizing the lake
(Parker, 1972). Other studies also indicate some heavy metal pol-
lution in the lake from upstream mining activities on the Southfork
Coeur d’Alene River (Idaho Department of Water Resources, et al.,
1975; Idaho Department of Health and Welfare, 1975).
B. Rate-Limiting Nutrient:
The algal assay results were not considered representative of
conditions in the lake at the times the samples were taken. The lake
data indicate nitrogen limitation at all sampling stations during
summer and at Stations 01-03 during spring. Phosphorus limitation
was indicated at all Stations during fall, and at Stations 05-08
during spring.
C. Nutrient Controllability:
1. Point sources —
During the sampling year, point sources contributed 7.6%
of the total phosphorus load to the lake. The South Fork Coeur
d 1 Alene Sewer District contributed 5.3%, the St. Manes plant
contributed 1.9%, and the remaining 0.4% was contributed by
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3
three additional plants.
The calculated phosphorus loading of 1.39 g P/m 2 /yr was
greater than that proposed by Vollenweider (1975) as Ieutrophicu
for a lake with such volume and retention time. The loading
data suggest that 90% reduction of contributions from known
point sources would lower nutrient loading to below this
“eutrophic” level. Although Vollenweider’s model may not be
applicable to lakes with short hydraulic retention times (only
19 days for Coeur d’Alene Lake), the lake is demonstrating
some localized tendency towards eutrophication and future
development around the lake should be considered carefully in
light of potential problem conditions arising from overenrich-
ment. Examination of land use practices and identification
of any additional point sources is needed before definitive
recommendations on nutrient controllability in Coeur d’Alene
Lake can be proposed.
2. Nonpoint sources -
Nonpoint sources contributed 92.4% of the total phosphorus
load to Coeur d’Alene Lake during the sampling year. The
Coeur d’Alene River contributed 54.6%, the St. Joe River con-
tributed 31.3%, and ungaged drainage areas were estimated to
have contributed 3.4% of the total phosphorus load.
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4
The phosphorus export rates of tributaries to Coeur d’Alene
Lake were comparable to nearby Twin Lakes* (range of 8-15
kg P/km 2 /yr) with the exception of Coeur d’Alene River, which
has a slightly higher export rate of 26 kg P/km 2 /yr.
*See “Report on Upper and Lower Twin Lakes”, Working Paper No. 787.
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5
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) sampling data. Tributary
flow data were provided by the Idaho District Office of the U.S.
Geological Survey (USGS). Outlet drainage area includes the lake
surface area. 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 as
Appendix A.
A. Lake Morphometry:
1. Surface area: 129.50 km 2 .
2. Mean depth: 2.3 meters.
3. Maximum depth: 57.9 meters.
4. Volume: 294.187 x 106 m 3 .
5. Mean hydraulic retention time: 19 days.
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6
B. Tributary and Outlet:
(See Appendix B for flow data)
1. Tributaries -
Drainage 2 Mean flow
Name area (km ) ( m 3 /sec )
C-i Wolf Lodge Creek 153.1 1.48
D-i Coeur d’Aiene River 3,833.2 72.37
E-l St. Joe River 4,480.7 96.11
F-i Benewah Creek 137.0 0.71
G-i Pluniiier Creek 112.4 0.31
H-i Lake Creek 68.6 0.66
Minor tributaries and
immediate drainage - 1,030.8 7.74
Totals 9,615.8 179.38
2. Outlet - A-i Spokane River 9,945.6 176.52
C. Precipitation:
1. Year of sampling: 67.9 cm.
2. Mean annual: 66.1 cm.
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7
III. LAKE WATER QUALITY SUMMARY
Coeur d’Alene Lake 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 eight stations on the lake (Station 04 was only sampled twice)
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 a analysis and phytoplankton identifi-
cation and enumeration. During the first and last visits, 18.9-liter
depth-integrated samples were composited for algal assays. Maximum
depths (expressed in meters) sampled are listed below:
Station Number Maximum Depth (meters )
01 18.6
02 34.1
03 56.4
04 36.6
05 32.9
06 15.8
07 15.2
08 8.2
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 Ill-A for waters at the surface and at the maximum
depth for each site. Results of the phytoplankton counts and chlo-
rophyll a determinations are included in Ill-B. Results of the lim-
iting nutrient study are presented in Ill-C.
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LA”F COF’’ )‘ALEINI
STODET Cf ’ )6t)3 ‘r1’rSICt. ANO ChEMICAL C8ARACTERISTICS
4/ ‘./Th ) ( 7/22/75 ) C 9/ 9/75
‘ AX AX MAX
= ‘ E T— = DEPT ’ çoc* = 9 DEPTN
MANGE RANGE
jA ( &T -S) ‘v° ANGF MEO1A (METERS) N* PANGE MEDIAN HETE°S
TEvPE?ATu E iC E ’ C \fl
0.—I.5 flE T -1 14 3.3— ‘ .2 3.c ’ 0.0— 1.’ 1 l’ .8— 21.7 19.9 0.0— 1.5 17.3— i°.1 19.9 0.0— 1.5
MAX DEPT . 4* 7 3.4— 4.? 4 0 7.9— 56.4 0 4.3— 10.1 6.1 7.9— 54.3 7.0— 16.9 8.6 8.2— 53.3
OI SOIVED 0 ’YGEo ( C’/L)
13 fl.4— 11.n 1?. 0.0— 1.— 1 5.6— 9.7 9.2 0.0— 1.5 16 7.6— 10.0 9.0 0.0— 1.5
MAX DFPTM** 7 11.4— l2. 12.0 7.9— 55•4 8 7.8— 10.6 S.f. 7.9— 54.3 6 2.8— 8.6 7.3 8.2— 53.3
C0\JD’JCTIVITV (I Mr1fl )
0.—1.S DEPTH 14 25.— 42. 30• 0.0— 1.5 35.— 57. 48. 0.0— 1.5 16 46.— 71. 52. 0.0— 1.5
“AX DEPTH** 7 29.— 45. 40. 7.9— 56.4 25.— 47. 40. 7.9— 54.3 8 37.— 47. 43. 8.2— 53.3
P1-, (STANDAP( IJNITS)
DEPT- i 14 6.7— 7.8 7.3 0.0— 1.5 16 7.7— 8.3 8.1 0.0— 1.5 16 7.2— 9.1 7.8 0.0— 1.5
MAX OEPTH** 7 7.0— 7.. 7.2 7.9— 56.6 8 7.1— 8.4 7.5 7.9— 54.3 8 6.6— 7.4 7.0 8.2— 53.3
TOTAL ALKALINITY (MG/L)
rEPTH 14 14.— 25. 20. 0.0— 1.5 is.— 31. 23. 0.0— 1.5 16 17.— 30. 25. 0.0— 1.5
MAX DEPTI 4** 7 ] ... )Q. 79— 55.4 15.— 31. 25. 7.9— 54.3 8 19.— 31. 25. 8.2— 53.3
TOTAL P (“GIL)
M fl’ PTrI 14 0.015—0.05? Q .0 B 0.0— 1.s 15 0.010—0.035 0.016 0.0— 1.5 16 0.006—0.029 0.012 0.0— 1.5
“AX DEPT,1** 7 0.070—0.100 0.04w 7.9— 55.4 9 0.017—0.034 o.oi 7.9— 54.3 8 0.008—0.390 0.016 9.2— c3.3
DISSOLVED OPTHO P (MG/LI
O.—1.S H DEPTH 14 0.001—0.014 0.005 0.0— 1.5 16 0.004—0.015 0.010 0.0— 1.5 16 0.002—0.020 0.002 0.0— 1.5
MAX OEPTHo 7 0.003—0.020 0.008 7•9— 56.4 4 0.009—0.014 0.011 7.9— 54.3 8 0.002—0.013 0.002 8.2— 53.3
N02.N03 (MC,/L)
0.—l.5 M ‘)EPTH 14 0.020—0.330 0.205 0.0— 1.5 15 0.020—0.020 0.020 0.0— 1.5 if. 0.020—0.020 0.0 0 0.0— 1.5
MAX DEPTII*Q 7 0.020—0.390 0.190 7.9— 56.4 8 0.020—0.050 0.025 7.9— 54.3 8 0.020—0.140 0.030 8.2— 53.3
AMMONIA (MG/LI
0.—l.5 H ‘ E ’TM 14 0.0 0—0.040 0.070 0.0— 1.5 15 0.020—0.040 0.020 0.0— 1.5 if. 0.020—0.020 0.020 0.0— 1.5
MAX DEPT8*D 7 0.020—0.040 0.070 7.9— 55.4 8 0.020—0.080 0.030 7.9— 54.3 9 0.0?0—0.020 0.020 8.2— 53.3
KJELDArIL N (MG/LI
1 .—l .5 N DEPTh 14 0.200—0.400 0.300 0.0— 1.5 16 0.200—0.600 0.300 0.0— 1.5 16 0.200—0.200 0.200 0.0— 1.5
MAX OEPTH** 7 0.200—0.400 0.200 7.9— 56.4 4 0.200—0.400 0.200 7.9— 54.3 9 0.200—0.400 0.200 8.?— 53.3
SECC-iT DISC ETE S)
7 0.7— 3.7 1.5 2.4— 3.4 3.4 H 2.3— 5.8 4.7
N = O. OF 5AMDL
1’ . ‘ AXIMiJM EPTrl S4U LE0 AT EACH SITE
*** s = r’iQ OF STiES SAMPLED O ThIs DATE
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9
B. Biological Characterisitcs:
1. Phytoplankton -
Al gal
Sampling Dominant Units
Date Genera per ml
04/04/75 1. Melosira 9,594
2. Asterionella 592
3. Synedra 296
4. Fragilaria 85
5. Cryptomonas 42
Other genera 42
Total 10,651
07/22/75 1. Melosira 389
2. Aphanizomenon 272
3. Fragilaria 272
4. Anabaena 233
5. Chroomonas 117
Other genera 233
Total 1,516
09/09/75 1. Aphanizomenon 471
2. Tabellaria 471
3. Cryptomonas 118
4. Melosira 47
5. Synedra 47
Other genera 95
Total 1,249
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2. Chlorophyll a -
Sampling Station Chlorophyll a
Date Number ( pg/i )
04/04/75 01 17.9
02 17.0
03 32.1
04 - - - -
05 26.1
06 18.2
07 7.7
08 1.9
07/22/75 01 3.8
02 3.3
03 3.8
04 3.3
05 4.2
06 2.3
07 3.1
08 2.8
09/09/75 01 4.1
02 5.9
03 6.8
04 10.3
05 14.3
06 16.0
07 29.3
08 4.8
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C. Limiting Nutrient Study:
The algal assay results are not considered representative of
conditions in the lake at the time the samples were collected (04/04/75,
09/09/75) due to significant changes in nitrogen and phosphorus levels
in the samples during shipment from the field to the laboratory.
The lake data suggest phosphorus limitation during fall sampling
(mean inorganic nitrogen to orthophosphorus ratio of approximately
17/1) and primary limitation by nitrogen during sumer (N/P ratio
of 5/1). During the spring primary limitation by nitrogen was sug-
gested for Stations 01-03, and phosphorus limitation for Stations
05-08.
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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. Sam-
pling 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 normalizedH 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 program for calculating
stream loadings. Nutrient loads indicated for tributaries are those
measured minus known point source loads, if any.
Nutrient loadings for unsampled “minor tributaries and immediate
drainage” (“ZZ” of USGS) were estimated by using the mean annual
nutrient loads, in kg/km 2 /yr, in Wolf Lodge Creek and Benewah Creek
at Stations C-i and F-i and multiplying the means by the ZZ area in
km 2 .
The operators of the South Fork Coeur d t Alene Sewer District
and St. (lanes wastewater treatment plants provided monthly effluent
samples and corresponding flow data. Nutrient loads for the city
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of Santa wastewater treatment plant were estimated at 1.134 kg P
and 3.401 kg N/capita/year. Nutrient loads for the Plummer and
Harrison wastewater treatment plants were calculated using provided
monthly effluent samples and estimated flow data.
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A. Waste Sources:
1. Known Municipal -
Pop. *
Name Served __________
South Fork 14,000
Coeur d’Alene
Sewer District
St. Manes
Plumer
Santa
Harrison
*Treatment plant questionnaires.
**Estimated at 0.3785 m 3 /capita/day.
Receiving
Water
Coeur d’Alene River
St. Joe River
Pluniner Creek
St. Manes River!
St. Joe River
Coeur d’Alene River
Trea trnen t
Acti vated
Sludge
Stabilization
Pond
Stabilization
Pond
Stabilization
Pond
None
Mean Flow
( m 3 /d x iO )
13. 779
3.130
0.130**
0.038**
0.113**
2,900
344
100
300
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B. Annual Total Phosphorus Loading - Average Year:
1. Inputs —
% of
Source kg P/yr total
a. Tributaries (rionpoint load) -
C-i Wolf Lodge Creek 780 0.4
D-i Coeur d’Alene River 98,085 54.6
E-l St. Joe River 56,325 31.3
F-i Benewah Creek 930 0.5
G-1 Plummer Creek 435 0.2
H-i Lake Creek 980 0.6
b. Minor tributaries and immediate
drainage (nonpoint load) - 6,185 3.4
c. Known municipal STP’s -
South Fork Coeur d’Alene 9,615 5.3
Sewer District
St. Manes 3,395 1.9
Plummer 335 0.2
Santa 115 0.1
Harrison 120 0.1
d. Septic tanks* - 250 0.1
e. Known industrial - None
f. Direct precipitation** - 2,265 1.3
Totals 179,815 100.0%
2. Output - A-i Spokane River 109,525
3. Net annual P accumulation 70,290
*Estimate based on 875 lakeshore residences, 4 camps and 1 park.
**Estimated (See IS lES Working Paper No. 175).
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24,810
1,492,530
1 ,483,900
14,465
12,285
36,605
30,960
12,400
575
340
600
9,325
% of
total
0.7
43.9
43.7
0.4
0.4
1.1
4.1
0.9
0.4
<0.1
<0.1
<0.1
0.3
* [ stjmate based on 875 lakeshore residences, 4 camps and 1 park.
** [ stjmated (See NES Working Paper No. 175).
***Export probably due to unknown sources and/or sampling error.
kg N/yr
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
Source
a. Tributaries (nonpoint load) -
C-i Wolf Lodge Creek
D-1 Coeur d’Alene River
E-l St. Joe River
F-l Benewah Creek
G-l Plummer Creek
H-l Lake Creek
b. Minor tributaries and immediate
drainage (nonpoint load) —
c. Known municipal STP’s -
South Fork Coeur d’Alene
Sewer District
St. Manes
P1 ummer
Santa
Harri son
d. Septic tanks* -
e. Known industrial - None
f. Direct precipitation** -
1 )O 1 )
I JO I
Totals
2. Outputs - A-i Spokane River
3. Net annual N export*** -
4.1
100.0%
139,810
3,396,730
4,354,550
957 ,820
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D. Mean Annual Nonpoint Nutrient Export by Subdrainage Area:
Tributary kg P/krn 2 /yr kg N/km 2 /yr
Wolf Lodge Creek 5 162
Coeur d’Alene River 26 389
St. Joe River 13 331
Benewah Creek 7 106
Piummer Creek 4 109
Lake Creek 14 534
E. Mean Nutrient Concentrations in Ungaged Streams:
Mean Total P
(m Ii)
Mean Total N
Tributary ___________ ( mg/i )
B-i Fernan Lake Outlet 0.042 0.743
J-l Rockford Creek 0.053 1.180
K-i Mica Creek 0.034 0.471
L-1 Murphy Creek* 0.170 7.690
M-i Rose Creek* 0.192 3.307
N-i Rose Creek* 0.241 3.151
P-i South Fork Rock Creek* 0.173 3.384
Q-i Cougar Creek 0.070 0.941
R-l Cottonwood Creek 0.492 4.316
S-i Squaw Creek 0.060 1.036
Nutrient levels in tributaries L—l through P-i, (the special
interest tributaries) and in Cottonwood Creek (R-l) are substantially
higher than any of the other tributaries draining into Coeur d’Alene
Lake which were sampled by NES in 1975. The reason for this in-
flation of nutrient levels is not known.
*Specjai interest tributaries which do not drain into Coeur d 1 Aiene
Lake.
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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 “ol igotrophic.”
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
Phosphoru Loading
(g/m /yr)
Estimated loading for Coeur d’Alene Lake 1.39
Vollenweider’s “eutrophic” loading 1.30
Vollenweider’s “oligotrophic” loading 0.65
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I g
V. LITERATURE REVIEWED
Idaho Department of Health and Welfare. 1975. Idaho Water Quality
Status. Division of Environment, Boise, Idaho.
Idaho Department of Water Resources, Department of Health and Welfare,
Department of Fish and Game, and Department of Budget, Policy
Planning and Coordination. 1975. Idaho Environmental Review.
Boise, Idaho.
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.
Parker, J.E. 1972. Algae Production and Nutrient Enrichment in
Lake Coeur d’Alene, Idaho. A thesis for the Master of Science
degree in Zoology, University of Idaho.
U.S. Environmental Protection Agency. 1975. National Eutrophica-
tion Survey riethods 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. Hydrol. 37:53-84.
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20
VI. APPENDICES
APPENDIX A
CONVERSION FACTORS
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CONVERSI0 FA(;TORS
Hectares x 2.471 icres
Kfloriieters x 0.6214 miles
Meters x 3.281 = feet
Cubic L CterS X 8.107 x 10 = acre/feet
Square kilometers x 0.3861 = square miles
Cubic Fn ters/sec x 35.315 = CubiC feet/sec
Centimeters x 0.3937 inches
kilogruns x 2.205 pounds
Kllocjrams/squcLre kilometer x 5.711 lbs/square mile
-------
APPENDIX B
TRIBUTARY FLOW DATA
-------
TRIBUTARY FLOW INFORMATION FOR IDAHO 08/23/76
LAKE CODE 1603 COUER D’ALENE
TOTAL DRAINAGE AREA OF LAKE(SO t(M) 9945.6
SUB—OQAINAGE NORMALIZED FLOWS(CMS)
TRIBUTARY ARE4(SO KU) JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC MEaN
1 603A1 9945.6 165.55 170.18 218.61 418.52 521.88 274.96 54.93 26.19 30.02 47.01 80.99 131.96 176.52
1603C1 153.1 0.914 2.662 3.936 4.248 3.483 1.388 0.311 0.085 0.085 0.113 0.255 0.368 l .479
160301 3833.2 51.54 69.66 90.05 208.70 208.98 78.44 25.77 13.48 11.78 16.93 35.96 58,33 72.37
1603E1 4480.7 52.10 68.81 95 .lj 238.99 317.71 166.22 48.70 21.92 17.87 23.53 41.63 60.03 96.11
1603F1 137.0 0.453 0.793 1.359 3.115 1.614 0.425 0.085 0.028 0.028 0.057 0.198 0.453 0.714
1603G1 112.4 0.14? 0.283 0.566 1.699 0.7DB 0.113 0.011 0.003 0.003 0.008 0.057 0.142 0.310
1603H1 68.6 0.481 0.821 1.246 2.492 1.416 0.453 0.142 0.057 0.057 0.085 0.255 0.510 0.665
1603ZZ 1160.3 5.13 8.64 17.08 29.45 17.84 5.72 1.39 0.48 0.48 0.71 2.12 4.16 7.74
SUMMARY
TOTAL DRAINAGE AREA OF LAKE c 9945.6 TOTAL FLOW IN = 2154.25
SUM OF SUR—DRAINAGE AREAS = 9945.3 TOTAL FLOW OUT = 2120.79
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY FLOW DAY FLOW DAY FLOW
160341 10 74 47.657 19 47.289
11 74 58.644 16 52.669
12 74 54.793 14 52.103
1 75 77.758 19 61.448
2 75 92.766 16 95.711
3 75 182.077 14 203.315
4 75 215.321 19 232.481
5 75 635.996 16 778.713
6 75 519.614 18 501.208 28 339.802
7 75 83.931 11 128.842 27 41.626
8 75 43.212 10 23.078
9 75 50.206 13 43.325
1603C1 10 74 0.040 20 0.037
11 74 0.122 1€, 0.048
12 74 0.136 14 0.091
1 75 0.252 19 1.019
2 75 0.510 16 0.821
3 75 2.322 14 1.841
4 75 4.163 19 4.814
5 7S 5.097 16 5.663
6 75 2.095 18 1.557 28 1.303
7 75 0.481 11 0.396 27 0.283
8 75 0.156 10 0.110
9 75 0.088 13 0. 0B2
-------
TRIAUT*RV FLOW INFORMATION FOR IDAHO 08/23/76
LAKE CODE 1603 COUER D’ALE E
MEAN MONTHLY FLOWS AND DAILY FLOWS(CUS)
TRIBUTAQY MONTH YEAP MEAN FLOW OhY FLOW DAY FLOW DAY FLOW
160301 10 74 12.063 20 11.808
11 76 22.087 16 13.167
12 74 20.813 1 5 17.302
1 75 29.959 19 93.021
2 75 32.736 16 54.368
3 75 73.765 14 58.050
4 75 134.590 19 160.840
5 75 381.428 16 699.992
6 75 200.710 18 133.712 28 87.641
7 75 45.335 Il 47.799 27 26.788
8 75 21.011 10 19.284
9 75 14.158 13 13.649
1603E1 10 74 15.659 20 14.980
11 74 18.887 16 15.178
12 74 17.217 15 15.688
75 ?9.733 16 25.315
2 75 28.317 8 19.171
3 75 51.820 14 42.475
6 75 105.905 19 116.665
5 75 378.879 16 657.234
6 75 3?1.396 18 238.428 28 162.256
7 75 81.553 11 86.366 27 51.253
8 75 36.812 10 34.547
9 75 21.634
1603F1 10 74 0.028 20 0.028
11 74 0.057 16 0.028
12 74 0.057 15 0.057
1 75 0.368 18 3.002
2 75 0.255 15 0.680
3 75 0.566 15 0.311
4 75 1.699 19 1.614
5 75 4.446 17 7.617
6 75 1.104 7 1.982 22 0.481
7 75 0.142 1? 0.142 26 0.057
8 75 0.085 10 0.057
9 75 0.057 6 0.057
160301 10 74 0.006 20 0.006
11 74 0.008 16 0.006
12 74 0.011 14 0.006
1 75 0.085 18 0.821
2 75 0.057 15 0.142
3 75 0.113 15 0.057
4 75 0.425 19 0.396
5 75 1.274 17 2.350
6 75 0.255 7 0.510 22 0.113
7 75 0.025 12 0.028 26 0.011
8 75 0.011
9 75 0.006 6 0.008
-------
TRIBUTARY FLOW INFORMATION FOP IDAHO 08/23176
LAKE CODE 1603 COIIER D’ALE’ E
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY FLOW DAY FLOW DAY FLOW
16 03H1 10 74 0.057 19 0.057
11 74 0.085 1F 0.057
12 74 0.113 14 0.085
1 75 0.425 1R 2.435
2 75 0.311 Ic 0.708
3 75 0.595 ic 0.368
4 75 1.501 jq 1.444
5 75 3.370 17 5.295
6 75 1.048 7 1.699 22 0.538
7 75 0.198 12 0.198 26 0.113
8 75 0.113
9 75 0.085 6 0.085
-------
STOPET RETRIEVAL DATE 76/08/25
NAIL EUTROPHICATION SURVEY
EPA-LAS VEGAS
75/04/04 09 30 0000
09 30 0005
09 30 0025
09 30 0040
09 30 0055
75/07/22 10 00 0000
10 00 0005
10 00 0030
10 00 0035
10 00 0061
75/09/09 10 15 0000
10 15 0006
10 15 0025
10 15 0042
00665 32217
PHOS—TOT CHLRPHVL
A
146/L P UGh
0.020
0.017
0.017
0.019
0.021
0.013
0.010
0.011
0.013
0.017
0.011
0.014
0.010
0.010
00031
IP4CDT LI
REMNING
PERCENT
160301
47 39 28.0 116 47 20.0 3
LAKE COEUR D’ALENE
16055 IDAHO
K VALUE KNOWN TO BE LESS
THAN INDICATED
1 1EPALES
0059 FEET
130391
2111202
DEPTH CLASS 00
00010
00300
00077
00094
00400
00410
00610
00625
00630
WATER
00
TRANSP
CNDUCTVY
PH
I
ALK
NH3—N
TOT
KJEL
NO2 NO3
PHOS—DIS
TEMP
CENT
MG/L
cECCHI
INCHES
FIELD
I4ICROMHO
SU
CACO3
MG/L
TOTAL
M6/L
N
MG/L
N—TOTAL
MG/L
ORTHO
MG/L P
DATE
TIME DEPTH
FROM
OF
TO
DAY
FEET
75/04/04
09 30
09 30
09 30
09 30
09 30
0000
0005
0025
0040
0056
75/07/22
10 00
10 00
10 00
10 00
10 00
0000
0005
0030
0035
0061
75/09/09
10 15
10 15
10 15
10 .15
0000
0005
0025
0042
DATE
TIME
DEPTH
FROM
OF
TO
DAY
FEET
3.3
13.0
108
37
7.65
17
0.020
0.300
0.020
3.3
12.8
38
7.65
16
0.020K
0.200
0.020K
0.004
3.4
13.0
40
7.60
16
0.020K
0.200K
0.020K
0.004
3.5
13.0
38
7.65
16
0.020K
0.200K
0.020K
0.004
3.5
12.8
40
7.50
16
0.020
0.200K
0.020K
0.004
18.8
9.0
132
54
8.30
21
0 ,040
0.600
0.020K
19.9
8.4
52
8.35
19
0.020
0.300
0.020K
0.011K
18.1
7.6
40
7.80
20
0.020
0.200K
0.020K
0,012K
10.4
9.4
40
7.50
19
0.020K
0.200K
0.020K
0,O1OJ
7.5
8.8
40
8.40
23
0,030
0.200
0.020K
0.009
18.9
8.8
228
49
7.30
17
0.020
0.200K
0.020K
0.002K
18.9
8.8
49
7.30
19
0.020K
0.200K
0.020K
0 ,002K
18.7
16.9
8 ,4
8.6
49
47
7.40
7.10
19
20
0.020K
0.020K
0.200K
0,200K
0.020K
0,020K
0.002K
0.002K
17.9
3.8
4.1
J VALUE KNOWN TO BE ESTIMATED
-------
APPENDIX C
PHYSICAL AND CHEMICAL DATA
-------
STORET RETRIEVAL DATE 76/08/25
WATt. EUTROPHICATION SURVEY
EPA-LAS VEGAS
75/04/04 10 10 0000
10 10 0005
10 10 0025
10 10 0050
10 10 0075
10 10 0106
75/07/22 10 30 0000
10 30 0005
10 30 0025
10 30 0035
10 30 0075
10 30 0112
75/09/09 11 40 0000
11 40 0005
11 40 0015
11 40 0030
-11 40 0045
11 40 0080
11 40 0111
0.016
0.016
0.025
0.019
0.023
0.020
0.014
0.011
0.011
0.010
0.011
0.030
0.009
0.010
0.012
0.011
0.013
0.010
0.019
00031
INCOT LT
REMNING
PERCENT
160302
47 38 00.0 116 43 15.0 3
LAKE COEUR O’ALENE
16055 IDAHO
K VALUE KNOWN TO BE LESS
THAN INDICATED
00010
00300
00077
00094
WATER
00
TRANSP
CNDUCTVY
TEMP
SECCHI
FiELD
CENT
MG/L
INCHES
MICROMHO
130391
2111202
DEPTH CLASS 00
1 1EPALES
0116 FEET
00400 00410
PH TALK
CACO3
SU MG/L
00610
NH3-N
TOTAL
MG/L
00625
TOT XJEL
N
MC /L
DATE
TIME DEPTH
FPO i
OF
TO
DAY FEET
75/04/04
10 10 0000
10 10 0005
tO 10 0025
10 10 0050
10 10 0075
10 10 0106
75/07/22
10 30 0000
10 30 0005
10 30 0025
10 30 0035
10 30 0075
10 30 0112
75/09/09
11 40 0000
11 40 0005
11 40 0015
11 40 0030
11 40 0045
11 40 0080
11 40 0111
DATE
TIME DEPTH
FROM
OF
TO
DAY FEET
00630
NO2 NO3
N—TOTAL
MG/I
3.4
12.8
144
0.200
0.030
3.4
12.6
37
7.60
21
0.200K
0.020K
3.5
13.2
37
7.60
22
0.020K
0.200
0.020K
3.5
13.0
38
7.70
0.200
0.020K
3.5
12.8
37
7.70
23
0.020K
0.200
0.020K
3.4
20.1
12.8
6.6
108
38
50
7.65
8.25
23
0.030
0.020K
0.400
0.200
0.020K
0.0 20K
20.5
8.2
44
8.15
20
0.200K
0.020K
20.0
8.8
36
8.20
22
0.020
0.200K
0.020K
10.9
6.8
33
7.45
0.200K
0.020K
6.2
1.4
37
7.35
23
0.200K
4.7
8.4
40
7.70
27
19
0.020K
0.200K
0.020K
18.9
8.8
228
7.20
0.020K
0.200K
0.020K
18.7
8.8
49
7.20
0.020K
0.200K
0.020K
18.6
9.2
49
7.35
20
0.020K
0.200K
0.020K
18.5
8.8
49
7.20
19
0.020K
0 .200K
0.020K
13.1
9.2
43
6.90
19
0.020K
0.200K
0.020K
8.3
8.0
45
6.75
0.200K
0,120
7.1
7.2
43
6.65
19
006-65
32217
PHOS—TOT
CHLRPHYL
A
MG/L P
UG/L
00671
PHOS—DIS
OR T HO
MG/L P
0.004
0.003
0.003
0.003
0.004
0.003
0.005
0.010
0.010
0.012
0.013
0.009
0 • 002K
0.002K
0.005
0.002
0.002K
0. 00 2K
0.003
3.3
5.9
-------
STOPET RETRIEVAL DATE 76/08/?5
NATI EUTROPHICATION SURVEY
EPA—LAS VEGAS
75/04/04 10 55 0000
10 55 0005
10 55 0015
10 55 0075
10 55 0120
10 55 0185
75/07/22 11 05 0000
11 05 0003
11 05 0025
11 05 0030
11 05 0070
11 05 0135
11 05 0178
75/09/09 11 15 0000
11 15 0005
11 15 0024
11 iS 0045
11 15 0080
11 15 0110
11 15 0140
11 15 0179
75/04/04 10 55 0000
10 55 0005
10 55 0015
10 55 0075
10 55 0120
10 55 0185
75/07/22 11 05 0000
11 05 0005
11 05 0025
11 05 0030
11 05 0070
11 05 0135
11 05 0178
75/09/09 11 15 0000
11 15 0005
11 15 0024
11 15 0045
11 15 0080
11 15 0110
0.021
0.022
01024
0 • 023
0 • 024
0.108
0.016
0.011
0.011
0.011
0.011
0.012
0.021
0.006
0.009
0.009
0.010
0.012
0.010
00031
INCDT LT
REMNING
PERCENT
160303
47 35 30.0 116 48 28.0 3
LAKE COEUR O’ALENE
16055 IDAHO
K VALUE KNOWN TO BE LESS
THAN INDICATED
1 1EPALES
0189 FEET
130391
2111202
DEPTH CLASS 00
00010
00300
00077
00094
00400
00410
00610
00625
00630
DATE
TIME
DEPTH
WATER
DO
TRANSP
CNDUCTVY
PH
T
4 1K
NH3—N
TOT
KJEL
NO2 NO3
PHOS—DIS
FROM
OF
TEMP
SECCHI
FIELD
CACO3
TOTAL
N
N—TOTAL
TO
DAY
FEET
CENT
MG/I
INCHES
MICROUHO
SU
MG/L
146/L
MG/L
MG/L
MG/L
DATE
FROM
TO
TIME DEPTH
OF
DAY FEET
MG/L P
3.4
13.0
72
42
7.70
23
0.020K
3.3
13.0
42
7.80
20
0.020K
0.300
0.020K
0.004
3,3
13.0
42
7.70
19
0.020
0.200
0.020
0.009
3.3
13.0
42
7.70
17
0 .020K
0.300
0.020
0,007
3.4
11.8
43
7.70
18
0.020K
0.200
0.020
0.005
3.4
12.2
44
7,50
16
0.030
0.400
0.070
0.020
20.0
7.6
132
56
8.30
23
0.020
0.400
0.020K
0.013
19.6
9.0
48
7,90
23
0.020K
0.200K
0,020K
0,011
18.4
8.6
38
8.15
25
0.020
0.200
0 .020K
0,013
11.9
9.2
30
7.60
25
0.020K
0.200K
0.020K
0.010
6.6
10.0
33
7.30
27
0.060
0.200
0.020
0.009
5.0
8.8
40
7.10
26
0.100
0.200
0.040
0.010
4.6
8.6
42
7.55
18
O.ORO_
0.200
0.050
0.014
0.002K
18.9
8.4
180
51
7.85
18
0,020K
0.200K
0,020K
18.7
9.0
59
7.85
26
0.020K
0.200K
0,020K
0,002K
18.3
9.0
47
7.80
27
0.020K
0.200K
0.020K
0.002K
13.7
8.4
45
7.45
27
0.020K
0.200K
0.020K
0,002K
8.1
8.0
45
7.10
28
0.020K
0.200K
0.020
0.002K
7.3
7.8
45
6,90
29
0.020K
0.200K
0.100
0.002K
7.2
7.0
41
6.70
28
0.020K
0.200K
0,120
7.0
7.6
47
7.40
27
0.020K
0.200K
0,020K
0.002K
0 665
32217
PHO!—TOT
CHLRPHYL
A
UG/L
32.1
3.8
6.8
-------
STOREr RETRIEVAL DATE 76/09/25
NAIL EUTRO lICATIO’ J SURvEY
EPA—LAS VEGAS
75/07/22 11 55 0000
11 55 0005
11 55 0020
11 55 0035
11 55 0080
11 55 0120
75/09/09 11 45 0000
11 45 0005
11 45 0020
11 45 0045
11 45 0090
11 45 0117
0.015
0.017
0.015
0.012
0.012
0.018
0.007
0.008
0.008
0.008
0.010
0.012
00031
P.JCDT LI
REMNING
PERCENT
160304
47 33 04.0 116 48 00.0 3
LAKE COEUR D’ALENE
16055 IDAHO
DATE
FP0’
TO
TIME DEPTH
0F
DAY FEET
11EPALES 760109
0124 FEET DEPTH
2111202
CLASS 00
00010
00300
00077
00094
H3—N
TOT KJEL
N02&N03
P OS—DIS
ATEP
DO
TRANSP
CNDUCTVY
PH
T
ALK
TOTAL
N
NTOTAL
091r40
TEMP
qECC-41
FIELD
CACO3
P4G/L P
75/07/22 11 55 0000
11 55 Oo0
11 5S 0020
11 55 0035
11 55 0080
11 55 0120
75/09/09 11 45 0000
11 45 0005
11 45 0020
11 45 0045
11 45 0080
11 45 0117
132
156
21.7
20 • 6
19.9
12.5
6.5
5.6
19.1
18.9
18.3
17•4
8.0
7.0
00665
53 8.30
48 8.30
45 8.30
30 7.50
37 7.30
45 7.50
53 7.90
51 8.15
51 8.00
43 7.60
45 7.20
45 6.85
DATE
FROM
TO
18 0.030
17 0.040
16 0.020
20 0.030
20 0.100
22 0.060
28 0.020K
28 0.020K
29 0•020K
29 0.020K
30 0.020K
31 0.020K
9.4
9.6
9.0
11.8
9.6
9.0
8.8
9.2
9.0
8.4
8.4
32217
CHLRPHYL
A
UG/L
3.3
10.3
TIME
OF
DAY FEET
DEPTH PHOS—TOT
0.400
0.300
0 • 300
0.200
0 • 300
0.400
0 .?OOK
0.200K
0.200K
0.200K
0.200K
0.200K
0.020K
0.020K
0.020K
0 • 020K
0.040
0.030
0 • 020K
0.020K
0.020K
0.020K
0 • 020K
0.140
MG/L P
0.012
0.004
0.011
0.008
0.010
0.013 -
0. 002K
0.002K
0. 002K
0. 002K
0.002K
0. 002K
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STOPET PETPIEVAL DATE 7f /08/?5
%IATL EUTROPHICATTO’ SitPVEY
EPA—LAS VEGAc
DATE
FROM
TO
00665
TIME DEPTH PHOS—TOT
OF
DAY FEET MG/L P
32217
CHLRPHYL
A
UG/L
00031
INCDT LT
REMNING
PERCENT
160305
47 29 52.0 116 51 35.0 3
LAKE COEUR O’ALENE
16055 IDAHO
75/04/04 11 40 0000
11 40 0005
11 40 0040
11 40 0070
11 40 0100
75/07/22 14 15 0000
14 15 0005
14 15 0015
14 15 0025
14 15 0080
14 15 0107
75/09/09 14 20 0000
14 20 0005
14 20 0016
14 20 0030
14 20 0050
14 20 0080
14 20 0108
0.039
0.038
0 • 046
0.045
0 • 049
0.018
0.015
0.013
0.039
0.030
0.03?
0.012
0.01?
0.012
0 • 020
0.012
0.012
0 • 390
DATE
F 80
TO
huE DEPTH
OF
DAY FEET
00010
00300
WATER
00
TPANSP
CNDUCTVY
TEMP
cECCt-iI
FIELD
I 1€PALES
0104 FEET
1 3O3 1
211 12fl2
DEPTH CLASS 0°
T
ALK
Ni43—N
TOT KjEL
NO? NO3
PHOS—DIS
CACO3
TOTAL
N
MG/L
N—TOTAL
MG/I
O THO
MG/I P
75/04/04 11 40 0000
11 40 OOO
11 40 004°
11 40 0070
11 40 0100
75/07/22 14 15 0000
14 15 0005
14 15 0015
14 15 0025
16 15 0080
14 15 0107
75/09/09 14 20 0000
14 20 0005
14 20 0016
14 20 0030
14 20 0050
)4 20 0080
14 20 0108
59
132
96
3.9
3.8
3.8
3.9
4.1
18.8
19.5
17.5
10.5
5.1
4•3
19.1
18.9
18.3
17.6
11.3
7.7
7.2
12.8
12.8
12.4
12.0
9.4
9.4
9.6
9.5
9.6
10.6
9,2
10.0
9.4
9.0
7.2
8.4
7 ,0
24 0.020K
25 0.020K
24 0.020K
22 0.020K
19 0.0 20K
24 0.040
23 0.020
23 0.020
23 0.030
26 0 060
26 0.030
20 0,020K
22 0.070K
19 0.020K
22 0.020
22 0 .020K
23 0,020K
22 0.0 20K
37 7.30
39 6.70
39 7.45
39 7.35
43 7.20
57 8.00
48 8,10
38 8.15
36 7.40
40 7.25
47 8.00
61 7.90
59 8.30
59 8.10
57 7.60
41 7.30
43 7.00
43 6.80
K VALUE KNOWN TO BE LESS
THAN INDICATED
0.300
0.200
0.300
0.300
0.200
0.500
0.300
0.300
0.300
0.300
0.300
0.200K
0.200K
0. 200K
0.200
0.200K
0.200K
0.400
0.210
0.210
0.210
0.220
0 • 200
0.020K
0 • 020K
0 • 020K
0, 020K
0 • 040
0.020
0 ,020K
0.020K
0.020K
0.020K
0.020K
0,050
0.110
0.005
0.005
0.006
0.007
0.008
0.015
0,010
0,010
0.010
0.004
0.011
0. 002K
0 • 002K
0.002K
0.007
0.002
0.002K
0,013
26, 1
4.2
14.3
-------
STOPET RETRIEVAL DATE 76/08/25
NATL EUTR0PP1ICATI0 SUP EY
EPA—LAS VEGAS
00665 32217
PHOS—TOT CI1LRPI-4YL
A
FEET MG/L P UG/L
75/04/04 11 10 0000
11 10 0005
11 10 0020
11 10 0035
ii ifl 0050
75/07/22 14 45 0000
14 45 0005
14 45 0015
14 45 0025
14 45 0052
75/09/09 14 45 0000
14 45 0005
14 45 0015
14 45 0035
14 45 0051
0.044
0 • 045
0 • 052
0 • 050
0 • 053
0 • 035
0.032
0.039
0.035
0 • 034
0 • 028
0.018
0 • 025
0.014
0.014
00031
IP4COT LT
RFMNING
PERCENT
160306
47 27 10.0 116 49 53.0 3
LAKE COEUR D’ALENE
16055 IDAHO
K VALUE KNOWN TO BE LESS
THAN INDICATED
DATE
FPOv
To
TIME DEPTH
OF
DAY FEET
I IEPALES
0054 FEET
1 3O3 i
2111202
DE T 1 CLASS 00
00010
00300
00077
00094
00400
PHUS—DIS
WATER
DO
TRANSP
CNDUCTVY
PH
T
ALI<
NH3—N
TOT
KJEL
NO?F NO3
OPTMO
TEMP
CENT
MG/L
SECCHI
INCHES
FIELD
MICROME4O
SU
CACO3
MG/L
TOTAL
MG/L
N
MG/L
N—TOTAL
HG/L
MG/L P
75/04/04 11 10 0000
11 10 0005
11 10 002fl
11 10 0035
11 10 0050
75/07/22 14 45 0000
14 45 0005
14 45 0015
14 45 0025
14 45 0052
75/09/09 16 45 0000
14 45 0005
14 45 0015
14 45 0035
14 45 0051
4.2
12.6
54
41
7.30
14
0.009
4.2
12.6
41
7.20
14
0.020K
0.400
0,700
0.009
4.1
12.2
41
7.20
17
0.020K
0.200
0.700
0.008
3.9
12.2
39
7.00
23
0.020K
0.200
0,180
0.008
4.1
11.8
45
7.05
23
0 .020K
0.200
0.190
0.010
19.8
9.3
132
54
8.00
29
0,020
0.400
0.020K
0.013
19.4
9.2
48
7.90
28
0.030
O.?OOK
0.020K
0.009
18.0
9.4
49
7.55
28
0.020K
0.200K
0.020K
0.011
12.5
9.0
36
7.20
27
0.020
0.200K
0.020K
0.010
6.7
7.8
36
7.50
15
0.020
0.200K
0.040
0.002
18.7
9.0
90
71
7.60
25
0.020K
0.200K
0.020K
0.002K
18.3
9.0
62
7.85
25
0.020K
0.200K
0.020K
0.002K
18.0
9.4
69
7.80
25
0.020K
0.200K
0.020K
17.4
10.6
9.2
7.4
61
42
7.15
7.30
26
24
0.020K
0.020K
0.200K
0.200K
0,020K
0,020K
0.002K
DATE
FROM
TO
TIME DEPTH
OF
DAY
18.2
2.3
16.0
-------
STOPET ETqIEvAL DATE ‘76 ’08/2
NAIL EUTR0Pr ICATION SURVEY
EPA—LAS VEGAS
75/04/06 10 30 0000
10 30 0005
10 30 0015
10 30 0030
10 30 0045
75/07/22 15 15 0000
15 15 oooc
15 15 0015
15 15 0035
15 15 0050
75/09/09 15 15 0000
15 15 0005
15 15 ooic
15 15 0030
iS 15 0050
0.043
0.047
0 • 046
0 • 046
0.042
0.032
0.017
0.016
0.016
0.018
0.014
0 • 0.3
0.036
O • 020
0.019
160307
47 24 52.0 116 45 15.0 3
LAKE COEUR D•ALENE
16055 IDAHO
K VALUE KNOWN TO BE LESS
THAN INDICATED
I 1EPALES
0050 FEET
130191
211 1202
DE TM CLASS 00
00010
00300
00077
00094
TOT KJEL
N0?&N03
DHOS_DIS
WATER
DO
TRANSP
CNDUCTVY
PH
1
ALK
NH3—N
N
N—TOTAL
ORT O
TEMP
SECCf41
FIELD
CACO3
MG/L
MG/L
MG/L P
CENT
MG/L
TNC’- ES
WICROMMO
SU
MG/L
DATE
TIME DEPTH
FO0
OF
TO
DAY FEET
75/04/04
10 30 0000
10 30 0005
10 30 0015
10 30 0030
10 30 0045
75/07/22
iS 15 0000
15 15 onoc
15 15 0015
15 15 0035
15 15 0050
75/09/09
15 15 0000
15 15 0005
15 15 0015
15 15 0030
15 15 0050
DATE
TIME DEPTH
FROM
OF
TO
DAY FEET
4.2
11.4
42
0.300
0.750
0.014
4.1
11.4
31
7.20
17
0.030
0.200
0.240
0.0)0
4.0
11.4
33
7.20
15
O.O?O’(
0.200
0.250
0.009
4.2
11.6
33
7.15
0.200
0,740
0.010
4.0
11.4
35
7.00
16
0.200
0.020K
0.010
20.0
9.6
132
43
7.70
15
0.020
0.200K
0.020K
0.014J
19.8
9 7
42
7.80
27
O.200’<
0.020K
0.OIIJ
14.6
10.2
41
7.60
27
O.O’OK
0.200K
0.020K
0.O1OJ
11.1
9.4
36
7.40
2S
0.200K
0.020K
0.012J
9.2
8.6
38
7.15
28
0.020K
0.200K
0.020K
0.020K
17.8
7.6
96
57
7.20
0.200
0.020K
0.003
17.3
9.2
59
7.90
25
0.020K
0.200K
0.020K
0.002
17.0
8.8
61
7.55
27
0.020K
0.200K
0.020K
0.002K
15.7
7.4
53
7.20
26
0.002K
00665 32217
PHOS-TOT CHLRPHYL
A
MG/L P UG/L
00031
INCDI LI
PENNING
PERCENT
7.7
3.1
29.3
J VALUE KNOWN TO BE ESTIMATED
-------
1 1EPALES
0030 FEET
211 12fl2
DEPTH CLASS 00
75/04/04 09 35 0000
09 35 0005
09 35 0015
flQ 35 0026
75/07/22 15 60 0000
15 40 0005
15 40 0015
15 40 0026
75/09/09 15 50 0000
15 50 0005
is so 0018
15 50 0027
0 • 052
0 • 050
0 • 058
0.07?
o • 02?
0.019
0.018
0.017
0.016
0.018
0.016
0.019
K VALUE KNOWN TO BE LESS
THAN INDICATED
STORET RETRIEVAL DATE 76/08/25
NATL EUTROPHICATION SURVEY
EPA-LAS VEGAS
DATE
FROM
TO
TIME DEPTH
OF
DAY FEET
160308
47 21 50.0 116 45 10.0
LAKE COEUP D’ALENE
1600g IDAHO
3
130391
75/04/04 09 35 0000
09 35 0005
09 35 0015
09 35 0026
75/07/22 15 40 0000
15 40 0005
15 40 0015
15 40 O02 ’
75/09/09 15 50 0000
15 50 0005
15 50 0018
15 50 0027
00010
00300
00077
00094
00400
00410
00610
00625
O06 O
00671
WATER
DO
TRAWSP
CNDUCTVY
PH
1
ALK
NH3—N
TOT KJEL
NO2 .NO3
P 4( S —DjS
TEMP
cECCHI
FIELD
CACO3
TOTAL
N
N—TOTAL
OPTpIO
CENT
MG/L
INCHES
MICROMHO
SO
HG/L
MG/L
MG/L
MG/L
MG/L P
DATE
FROM
TO
TIME DEPTH
OF
DAY FEET
4.2
11.4
29
25
7.35
22
0.040
0.300
0. 0fl
0.012
4.2
11.4
25
7.20
20
0,030
0.300
0,330
0.013
4.2
10.8
27
7.20
21
0.030
0.300
0.360
0.013
4.2
11.4
29
7.10
20
0.040
0.300
0.3 0
0,016
20.6
9.2
96
35
8.20
31
0.040
0.400
0.020K
0.005
20.8
9.4
39
7.85
31
0.0 20K
0.200
0.020K
0.01Od
15.6
8.6
30
7.40
31
0.020K
0.200K
0.020K
0.012 . )
10.1
8.6
25
7.40
31
0.020K
0.200K
0.020K
O.O11J
18.9
9.4
174
46
7.45
30
0 ,020K
0.200
0.020K
O,00?K
18.3
9.0
46
7.70
29
0.020K
0.200K
0.020K
0.002K
17.6
9.2
45
7.50
30
0.O?OK
0.200K
0.020K
0.002K
13.3
2,8
37
7.10
29
0.020K
0.200K
0.020K
0.002K
00665
32217
00031
PHOS—TOT
CHLRPHYL
INLOT LI
A
RFMNING
MG/L P
UG/L
PENCENT
1.9
J
VALUE
KNOWN
TO
BE
ESTIMATED
2.8
4.8
-------
APPENDIX D
TRIBUTARY AND WASTEWATER
TREATMENT PLANT DATA
-------
STODET RETRIEVAL DATE 76/08/25
NATL EUTPOPHICATIOP SUPvEY
EPA— A5 VEGAS
1603A1
47 42 10.0 116 58 40.0 4
SPOKANE RIVER
16 15 COEUR D’ALENE
O/COEUP D’ALENE LA’(E 130391
‘3NK 1.5 MT SW OF POST FALLS
1 IEPALES ?111204
0000 FEET DEPTPI CLASS 00
00630
00625
00610
00671
00665
DATE
TIME
OEPTN
NO? ,N03
TOT KJEL
P4H3-N
PHOS—DIS
PHOS—TOT
FROM
OF
u—TOTAL
N
TOTAL
OHTHO
TO
DAY
FEET
MG/L
MG/L
MG/L
MG/L P
MG/L P
74/10/19
16
30
0.032
1.000
0.0?0
0.010
0.025
74fl1/16
09
30
0.064
0.800
0.025
0.010
0.015
74/12/14
09
30
0.032
0.400
0.022
0.010
0.030
75/01/19
10
45
0.032
0.350
0.025
0.010
0.010
75/02/16
11
00
0.032
0.300
0.008K
0.015
0.015
75/03/14
10
40
0.010
0.350
0.015
0.010
0.020
75/04/19
08
30
0.005
1.200
0.060
0.005K
0.010
75/05,16
05
00
0.015
0.050K
0.020
0.010
0.020
75/06/LR
09
00
0.005
0.650
0.020
0.005K
0.030
75/06/28
11
40
0.005
1.150
0.015
0.005K
0.010
75/07/11
10
30
0.005
1.150
0.010
0.005K
0.010K
75/07/27
10
00
0.015
0.300
0.015
0.010
0.030
75/08/10
75/O /13
10
10
00
00
0.005
0.020
0.150
2.400
0.005
0.030
0.010
0.010
0.030
0.030
K VALUE KNOWN TO BE LESS
THAN INDICATED -
-------
STO ET RETRIEVAL DATE’ 76/O8/ ,
ATL TqOP 4TCAT1O J SURVEY
EPA— LAS VEGAS
160 3B1
47 40 15.0 116 45 05.0 4
FRENAN LAKE OUTLET
16 15 CflEUR D’ALENE
T/COEUP D’ALENE LAKE )303R1
i- wY 10 RRDG AT SE EDGE OF COE’J° D’ALE JE
11EPALES 2111204
000!) FEET OEPT 4 CLASS 00
00630
00625
00610
00671
00665
DATE
TIME
DEPT -4
N021M03
TOT
KJEL
NH3—
PHOS-DIS
PHOS—TOT
FROM
OF
N-TOTAL
TOTAL
ORTr4O
TO
DAY
FEET
MC ,/L
MG/L
MG/L
MG/L P
MG/L P
74/10/20
08
54
0.088
0.500
0.025
0.060
0.090
74/11/16
11
10
0.080
0.400
0.030
0.040
0.060
74/12/16
09
00
0.012
1.400
0.020
0.010
0.060
75/01/19
11
15
0.008
0.300
0.010
0.005K
0 .010K
75/02/16
11
45
0.043
0.100K
0.008K
0.010
0.013
75/03/14
11
04
0.005
0.300
0.010
0.005K
0.020
75/04/19
12
15
0.005
1.350
0.025
0.005K
0.020
75/05/16
11
30
0.032
1.530
O .OS S
0.006
0.017
75/06/18
13
30
0.010
1.325
0.030
0.005
0.035
75/06/28
12
15
0.015
0.350
0.040
0.010
0.010
75/07/11
11
00
0.050
0.475
0.050
0.015
0.030
75/07/27
10
35
0.OS S
0.350
0.025
0.015
0.040
75/08/10
10
30
0.140
0.250
0.020
0.050
0.090
75/09/13
10
30
0.330
0.300
0.015
0.035
0.060
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STOPET RETRIEVAL DATE 76/0 /25
JATt EUTRO .11CAT1O . Su°vEY
EPA- LAS VEGAS
1603C1
47 37 55.0 116 37 15.0 4
WOLF LODGE CREEK
16 15 LANE
T/COEUR D’ALENE LAKE 13fl3 1
PT 10 ROG 10.5 MI ESE OF CO UR D’ALENF
1 IEOALES 2111206
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
TIME OEPT
OF
DAY FEET
00630
00625
00610
NO2 NO3
TOT KJEL
Mh3—N
PHOS—DIS
PHOS—TOT
N-TOTAL
MG/L
N
UG/L
TOTAL
HG/L
ORTHO
‘G/L P
l0/L P
74/10/20
09
20
0.024
0.100K
74/11/16
11
40
0.080
0.300
0.015
0.010
0.010
74/12/14
13
20
0.104
3.400
0.035
0.005
0.030
7 ,O1/19
11
30
0.152
0.200
0.020
0.010
0.020
0.020
75/02/16
12
10
0.136
0.750
0.016
0.016
75/03/14
ii
25
0.065
0.100
0.010
0.010
75/04/19
09
10
0.020
0.500
0.040
75/05/16
12
00
0.035
0.100
0.050
0.025
0.030
75/06/18
14
00
0.015
0.650
0.025
0.010
7 5/06/2R
12
40
0.015
0.600
0.025
0.005
0.010
75/07/11
11
45
0.030
0.150
0.015
0.010
0.010
75/07/27
13
05
0.025
0.450
0.020
0.010
0.020
75/08/10
11
00
0.015
0.175
0.010
0.015
0.015
75/09/13
13
45
0.0?5
0.100K
0.040
0.010
0.020
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STO ET RETRIEVAL DATE 76i’c iR/2 ’
1TL. EUTROPHICATION SuRvEY
EPA— LAS VEGAS
160301
47 28 45.0 116 44 00.0 4
COEUR D’ALENE CREEK
16 15 MT ARIFS
T/COEUR D’ALENE LAKE 3Q391
8POG ON CNTY RD AT SPRNGTN
1 IEP4LES 21112’ 4
0000 FEET DEPTi- CLASS 00
0 630
00625
00610
DATE
TIME
DEPTH
N02&N03
TOT
KJEL
WH3—N
Pi-iOS—DIS
PHOS-TOT
FO0u
or
N—TOTAL
N
TOTAL
ORT’-IO
To
DAY
FEET
‘4G/L
MC,/L
MG/L
MG/I P
MG/L P
74/10/20
10
36
0.008
0. 100
0.015
74/11/16
15
00
0.144
0.800
0.060
0.010
0.030
74/12/15
10
00
0.152
0.600
0.1fl5
0.005K
0.020
75/01/19
14
00
0.160
0.200
0.100
0.005
0.040
75/02,16
16
05
0.184
1.000
0.064
0.037
0.090
75/03,14
12
50
0.125
0.450
0.040
0.055
0.110
75,04/19
11
00
0.060
1.400
O.0 5
0.020
0.040
75/05/16
15
30
0.035
0.950
0.060
0.010
0.050
75/06/18
16
00
0.020
0.150
0.020
0.020
0.040
75,06/28
13
40
0.015
0.700
0.015
0.015
0.050
75/07/11
14
00
0.005
1.050
0.020
0.030
0.010
75/07/27
11
35
0.005
0.300
0.010
0.020
0.060
75/08/10
12
30
0.005
0.200
0.005K
0.020
0.070
75/09/13
12
15
0.010
0. 100K
0.020
0.015
0.040
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STOREI PEIPIEVAL DATE 76/0 /25
‘ ATL EUT P) 1CAT1O : SURVEY
EPA— LAS VEGAS
1603E1
47 21 15.0 116 40 30.0 4
ST JOE RIVER
16 IS ST. MARIES
T/COEUP D’ALENE LA’(E 1303 1
F3 K 500 FT w OF DIP(E RD 6.7 U N W ST 4RS
11EPALES 2111204
0000 FEET DEPTH CLASS 00
00630
00625
00610
DATE
TIME
DEPT’
NO2 NO3
TOT KJEL
NH3—N
PHOS—DIS
PHOS—TOT
FROM
OF
N-TOTAL
N
TOTAL
ORTHO
P
TO
)AY
FEET
Mr,/L
HG/L
MG/L
MC,/L P
Mr,/L
74/10/20
11
22
0.016
0.500
0.010
74/11/16
15
40
0.032
0.500
0.020
O.005I
0.005
74/12/15
11
0.1
ti.232
0.200
O.0?0
0.010
0.020
75/03/14
12
20
0.055
0.550
0.020
0.015
0.040
75/04/19
10
15
0.015
0.550
0.015
0.010
0.020
75/05/16
13
30
0.030
0.100
0.060
0.015
0.010
7c/06/18
iS
00
0.005
1.300
0.015
0.005
0.020
75/06/28
14
00
0.005
0.150
0.007
0.005
0.010K
75/07/11
13
00
0.005
0.500
0.0?0
0.010
0.010
75/07/27
12
05
0.005
0.300
0.005
0.005
0.020
75/08/10
13
30
0.005
0.200
0.025
0.010
0.040
75/09/13
12
45
0.005
0.100
0.015
0.005
0.010
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STOPET PEIPIEVAL DATE 7 ,?O8/2S
TL EUTPOPHICAT1O SUPvE
EPA— LAS VEGAS
1603F1
47 20 10.0 116 40 56.0 4
BENEWAH CREEK
16 15 ST. MARIES
T/COEUR D’ALENE L4XE 130391
RT S BROG 6 MI W OF ST MA 1ES
I1EPALES 2111204
0000 FEET OEPTN CLASS 00
00630
00625
00610
00671
00665
DATE
TIME
DEPT-4
4O2 NO3
TOT KJEL
P4h3—tJ
PHOS—DIS
PHOS-TOT
FPOM
OF
u—TOTAL
P4
TOTAL
ORT O
TO
DAY
FEET
MG/L
MG/L
MGIL
P G/L
MG/L P
74/10/20
13
10
0.016
0.500
0.020
0.015
0.017
74/11/16
15
20
0.032
0.500
0.060
0.015
0.060
74/12/15
12
30
0.048
0.800
0.025
0.015
0.020
75/01/18
16
35
0.320
0.900
0.035
0.035
75/02,15
13
50
0.200
0.500
0.032
0.024
0.080
75/03/15
15
45
0.050
0.800
0.020
0.020
0.060
75/04/19
17
00
0.030
1.150
0.020
0.020
75/05/17
16
40
0.010
0.550
0.020
0.015
0.020
75/06/07
12
28
0.010
0.150
0.020
0.015
0.040
75/06/22
13
25
0.010
0.350
0.015
0.020
0.030
75,07,12
17
44
0.020
0.400
0.015
0.035
0.080
75/07/26
13
50
0.015
0.275
0.020
0.020
0.030
75/08/10
11
30
0.030
0.350
0.030
0.06S
0.100
75/08/31
75/09/06
14
18
46
17
0.020
0.005
0.300
0.200
0.025
0.005
0.050
0.015
0.075
0.030
-------
STODET QETWJ VAL UAlt
NAIL EUTP0P 1CATIO’s SURVEY
EPA— LAS qEGAS
1 603G1
47 21 30.0 hf’ 47 30.0 4
PLU, MER CPEEI
16 15 PLUMMER
T/COEU D’ALE E LAKE
c N.( 7 M NE OF PLUMMEP
11EPA ES 2U12fl
0000 FEET DEPT 4 CLASS 00
DATE
FROM
TO
TIfrE OEPT’-
OF
AY FEET
00630
00625
PHOS—TOT
N0? N03
TOT KJEL
p-i3—N
N-TOTAL
MG/L
N
MG/L
TOTAL
MG/L
O THO
UG/L P
MG/L
130391
74/10/20
13
45
0.056
0.100
0.030
0.030
74/11/16
16
08
0.44R
0.300
0.075
0.020
0.040
74/12/lA
14
14
0.4 O
0.100K
0.010
7 /01/18
16
15
2.000
1.600
0.085
0.060
0.048
0.090
75/02/15
16
45
2.400
0.700
0.056
0.035
0.090
75/03/15
16
09
1.570
0.650
0.030
75/04/19
17
25
0.250
1.750
0.045
0.050
75/05/17
17
15
0.010
0.250
0.015
0.030
0.060
75/06/07
12
45
0.015
0.600
0.020
0.045
0.090
75/06/?2
13
09
0.020
1.100
0.020
0.040
75/07/12
18
10
0.010
1.000
0.050
0.040
75/07/26
14
15
0.005
0.250
0.010
0.070
75/08/31
14
40
0.045
0.700
0.050
0.005
0.020
75/09/06
18
43
0.005
0.100
0.010
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STOPET 9ETRIEVAL DATE 76/OR/25
NATI EUTROPHIC T1ON SURVEY
EPA— LAS VEGAS
160 3M 1
47 29 30.0 117 00 03.0 4
LAP E CREEK
16 15 FLI FrELo WA
T/COEUR O’ALENF LAKE 130R92
BPDG .4 Mj NW JCT w US RI 95
1 IEPALES 21fl20’
0000 FEET DEPT-I CLASS 00
00630
00625
00610
00671
DATE
TI’IE DEPTW N02M O3
TOT
KJEL
Nh3-N
PIIOS—DIS
PHOS—TOT
FPn
TO
OF
DAY FEET
N-TOTAL
‘G/L
MG/I
TOTAL
MG/L
ORT’ O
M3/L P
MG/L P
74/IO 19
14
16
0.016
0.900
0.020
74/11/16
15
25
0.024
0.100
0.017
0.025
0.030
74/12/14
15
35
0.056
0.300
0.020
0.010
0.030
75/01/18
12
15
0.750
0.200
0.025
0.015
0.040
75/02/15
15
30
5.600
1.250
0.312
0.040
0.090
75/03/15
16
40
3.RflO
0.900
(v.100
0.025
0.060
75/04/19
18
10
0.420
1.000
0.042
0.030
75/05/17
15
55
0.020
0.350
0.030
0.010
0.020
75/06/07
11
50
0.010
0.400
0.030
0.010
0.040
75/06/2?
12
35
0.010
5.500
0.085
0.020
0.020
75/07/12
16
57
0.025
0.400
0.025
0.055
0.070
75/07/26
13
10
0.015
0.350
0.015
0.055
0.090
75/08/31
13
46
0.040
0.550
0.050
0.065
0.080
-------
STOPET RETRIEVAL OATE 76/08/?5
ATL EUTPCPHICATIO SURvEY
EPA— I AS VEGAS
1 bOiJI
47 30 50.0 116 54 30.0 4
ROC,cFORD CREEK
16 15 COEUR D’ALENE
T/COEUR O’ALENE LAKE 1303 U
SEC RD PROG 16 MI SSW OF C0EU O’ LENF
1 IEPALES 2111204
0000 FEET OEPTM CLASS 00
00630
00625
00610
DATE
TIME OEPTH N02 N03
TOT
KJEL
‘3—t
PrIOS—DIS
P .4OS—TOT
FP0M
TO
OF
DAY FEET
N—TOTAL
‘ G/L
N
H 13/(
TOTAL
MG/L
ORTHO
MG/L P
‘G/L P
74/10/1Q
14
55
.0?4
0.200
0.010
74/11/16
15
07
0.016
0.100K
0.010
0.035
0.035
74/12/14
0.049
0.500
0.035
0.030
0.030
75/01/18
11
55
1.180
0.900
0.046
0.060
75/02/15
15
55
2.800
0.700
0.048
0.040
0.100
75/03/15
17
05
2.100
0.500
0.030
0.030
0.060
75/04/19
18
25
0.530
1.100
0.030
0.025
75/05/17
15
35
0.040
0.050K
0.015
0.020
0.020
75/06,07
11
35
0.005
0.100
0.015
0.020
0.030
75/06/22
12
14
0.030
0.350
0.015
0.030
0.040
75/07/12
16
34
0.100
1.700
0.055
0.055
0.080
75/07/26
12
50
0.045
0.400
0.015
0.050
0.060
75/08/31
13
30
0.040
0.500
0.075
0.065
0.070
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STO ET RfTRIEVAL OATE ; ‘jf08/25
NATL EUTPOP11ICAT10 SURVEY
EPA- LAS VEGAS
160 3K 1
47 35 50.0 116 53 10.0 4
MICA CREEK
16 15 COEUR D’ALENE
T/COEUR O’ALENE LAKE 130391
- 4w ? 95 RDG 8.5 MI Sw COuE fl’ALENE
11EP LES 2111204
0000 FEET DEPIN CLASS 00
0063fl
00625
00610
00671
00665
DATE
TIME
DEPTI i
NO2 NO3
TOT KJEL
NH3-N
PHOS—DIS
PHOS—TOT
FOOM
OF
N—TOTAL
N
TOTAL
ORTHO
TO
flAY
FEET
C,/L
MG/L
NGfL
? 4 G/L P
MG/L P
74/10,19
15 26
0.024
0.300
0.025
0.020
0.050
74/11/16
1448
0.024
0.300
0.025
0.015
0.015
74,12/14
( ‘.032
0.500
0.025
0.010
0.010
75,01,18
11 20
0.176
0.300
0.024
0.025
0.060
75/02/15
16 20
0.200
0.024
0.024
0.060
75/03/15
17 19
0.045
0.150
0.010
0.020
0.030
75/04/19
18 45
0.050
1. 00
0.020
0.020
75/05/17
15 10
0.020
O.E%O0
0.0 50
0.010
0.020
75/06/07
ii 24
0.010
0.100
0.025
0.010
0.025
75/06/22
11 56
0.010
0.100
0.020
0.020
0.025
75/07/12
16 19
0.025
0.650
0.045
0.025
0.030
75/07/26
12 30
0.010
0.350
0.030
0.020
0.035
75/08/31
13 14
0.035
0.200
0.016
0.050
0.050
75,09,06
17 12
0.010
0.100
0.010
0.020
0.030
-------
STO ET RETDIEVAL DATE 76/08,25
NATL EUTROPHICATION SURVEY 160311
EPA— LAS VEGAS 47 27 00.0 117 04 40.0 4
MURPHY CREEP(
16 15 FAIRFIELD
T/COEUR DIALENE LAKE 130R92
SEC RD KING 2.3 MI E OF ROCKFOPD
1LEPALES 2111204
0000 FEET DEPTi- CLASS 00
00630 00625 00610 00671 00665
DATE TIME DEPTW NO2 NO3 TOT KJEL NH3-t PHOS—DIS PHOS—TOT
FROM OF N-TOTAL N TOTAL O THO
TO DAY FEET MG/I MG/L MG/L MG/L P MG/I P
75/02/16 16 40 8.700 1.800 0.152 0.200 0.290
75/03/15 15 35 9.900 0.850 0.105 0.085 0.140
75/04/19 13 40 0.870 0.950 0.020 0.045 0.080
-------
STOPET QETRIEVAL DATE 7 S/0A/?5
NAIL EU QOPlIICATIO SU° It’Y
EPA— A5 VEGAS
16031M
47 24 45.0 117 02 05.0 4
ROSE CREEK
16 15 FAIPFIELD
T/COEtJR O’ALENF LAKE 130Q92
CHATCOLET D XING .2 MI E wAS 1/jD BOPD P
11EPA ES 21112C4
0000 FEET DEPTH CLASS 00
00630
00625
0061fl
00671
00665
DATE
TIME
DEPTH
N0? NO3
TOT KJEL
iH3—N
P iOS—DIS
PHOS—TOT
FROM
OF
N-TOTAL
N
TOTAL
ORThO
TO
AY
FEET
Ht3/L
HG/L
MC,/L
‘1( /L P
MG/L 0
75/01,1R
12 50
1.120
0.900
O.0 5
0.250
0.360
75/02/16
15 25
6.970
1.900
0.104
0.195
0.200
75/03/15
15 25
7.100
1.250
0.055
0.095
0.150
75/04/19
13 55
1.800
0.900
0.015
0.035
0.ORO
75/05/18
13 20
0.185
1.600
0.050
0.060
0.160
75/06/07
14 05
0.005
0.500
0.020
0.050
0.110
75/06/22
14 46
0.010
1.400
0.015
0.055
0.080
75/07/12
75/07/26
14 35
1520
0.010
0.010
2.000
2.100
0.020
0.190
0.100
0.060
0.3R0
0.210
-------
STO ET RETRIEVAL DATE 76/fl8/?5
NATL FUTROPMICATION SIJ VEY
EPA- LAS VEGAS
16031N
47 23 25.0 117 02 1O.() 4
ROSE CREEK
15 FAIRFIELD
T/COEUR D’ALENE LAKE 13O 92
STATE LINE RD XING 6.5 MI OF FAP FIELO
I1EPALES 2111204
0000 FEET 0EPT -1 CLASS ( fl
00630
DATE
TIME DEPT} a NO? .NO3
FOOM
OF
N—TOTAL
TO
DAY FEET
MG/L
75/01/18 13 15
75/02/16 15 45
75/03/15 15 40
75/04/19 14 10
75/05/18 13 30
75/06/08 16 20
75/06/2? 15 00
75/07/12 14 45
00625
TOT KJEL
N
MG/L
0.600
1.700
0.800
1 • 350
1.250
1 • 150
I ) • 750
1.750
0.650
7.230
5.800
1.800
o • 175
0.005
(1.150
0.045
00610
NH3—N
TOTAL
MG /L
0 • 060
0.128
O • 050
0 • 085
0.115
0.015
o • 025
O • 095
00671
PI-40S—DIS
OPT 40
MG/I P
0 • 250
0.136
0 • 085
0 • 035
0 • 085
0 • 075
0.010
0.173
00665
P405—TOT
MG/L P
0.300
0 • 160
0 • 150
0 • 080
0.400
o • 280
0 • 120
0.440
-------
STOQET RETPIEVAL DATE 7A/O /25
HATL EUTQOPHICATI0
EPA— LA VEC,AS
160 31P
47 22 05.0 117 06 10.0 4
ROSE CREEK
16 15 FAIRFIELD
T/COELJP D’ALENE LAKE )30 P2
TRUAX PD AING 3.5 MI ESE OF ROCPIFOPO
1 1EPALES ?111204
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
75/0) /18
75/02/16
75/03 /IS
7S/04 19
75/05/18
75/06/08
75/06/2?
75,07/12
75/07/26
75/08/09
75/ 09/2 1
TIME DEPTH
OF
DAY FEET
13 50
16 05
15 o
14 35
13 55
14 45
15 15
iS 10
15 55
13 15
14 30
00630
N 02 F NO 3
N—TOTAL
G’L
4 • 180
8 • 280
5.200
2.200
0.125
O • 260
O • 020
o • 255
0 • 140
0.260
O • 350
00625
TOT KJEL
N
MC,/L
1.350
1.700
0.700
1.100
0.300
1.450
1.550
2.300
2.600
1 • 100
1.900
00610
NH 3—H
TOTAL
MG/L
0 • 190
0.160
0 • 022
O • 045
0.015
0.050
fl• 020
0 • 040
0 • 130
0 • 050
O • 035
00671
PHOS—DIS
OPT HO
UG/’L P
0 • 135
O • 088
0.060
0.035
O • 020
0.015
0 • 035
0.040
0 • 060
0.030
0.015
00665
QH OS—TOT
P ’3/L P
0.470
0.170
0.120
o • 180
O • 060
0 • 060
0.035
O • 280
0 • 330
0.160
0.040
-------
STOPET REr IEVAL DATE 76/OF /?S
.ATL EUTPOP -11CAT1O SU ,VEY
EPA— LAS VEGAS
160301
47 39 30.0 116 SO 40.0 4
COUGAR CREEK
16 15 COEIJP D’ALFNE
T/LA’(E COEU D’ALENE 1303Q1
US PT 95 9RDG 3.5 Mj SW OF C Ei’ D’ALEr. E
I I EPALES ?1112fl’
0000 FEET OEPTH CLASS 00
DATE
F9OM
TO
TT E DEPT -
OF
£)Ay FEET
00630
00625
00610
NO2 .NO3
TOT KJEL
J 3— ’J
PHOS—DIS
PHOS—TOT
N-TOTAL
VG/L
N
HG/L
TOTAL
MG/L
ORT’-40
MG/L p
MG/L P
74,10/19
15
50
0.026
0.900
74/11/17
14
15
0.016
0.300
0.020
0.025
0.025
74/12,14
12
45
0.040
0.700
0.020
0.020
0.040
75/O1/1
Ii
00
0.219
0.0 5
0.040
75/02/15
16
40
0.430
0.500
0.024
0.056
0.150
75/03/15
17
35
0.320
0.450
0.015
0.040
0.090
75/04/19
l
05
0.100
1.750
0.025
0.045
75/05/17
14
45
0.020
1.050
0.045
0.020
0.080
7 /06/07
11
09
0.010
0.100
0.015
0.025
0.060
75/06/22
11
10
0.015
0.100
0.030
0.030
0.060
7S /07/12
16
00
0.065
0.950
0.040
0.065
0.100
75/07/26
12
i
0.030
0.500
0.310
0.055
7S/08/3 1
13
00
0.040
2.100
0.035
0.080
0.090
75/09/06
16
50
0.020
1.700
0.040
0.045
0.070
-------
STO ET PETRrEV4L DATE 76/0€ /2S
JATL UT 0PHICATTO SURvEY
EPA— LAS VEGAS
1 603W1
47 26 30.0 116 50 20.0 4
COTTONWOOD CREE Pc
16 15 PLI)M FR
T/LAP(E COE1J D’ALENE 130391
DIRT RD BPPG R.0 MI W OF WORLEY
1IEPALES ?11120
0000 FEET DEPT - CLASS 00
00630
00625
00610
DATE
TIME
DEPTH
NO2 NO3
TOT (JEL
Nh3-F’
PHOS—DIS
°HOS—TOT
FOOM
OF
N —TflTAL
N
TOTAL
OPTMO
TO
DAY
FEET
V ,,L
‘G/L
MG/L
MG/L P
MG/L
75/01/18
15 20
2.610
0.700
0.040
0.075
0.260
75/02/16
14 35
6.210
0.900
0.072
0.088
0.100
75/03/iS
14 50
3.670
3.300
0.030
0.060
0.280
75/04/19
15 30
0.345
2.800
0.050
0.130
1.800
75/05/18
14 40
0.005
1.060
0.050
0.010
0.020
-------
STOQET pET rEvAL DATE 7 ’/08/25
NATL EUTROPHICATIO ’ SURVEY
EPA— tA V C,AS
1603S1
47 24 20.0 116 46 25.0
SQUAW CREEK
16 iS PLIJMMER
T/LAI\E COFUR O’ALE 4E 1303 1
BANK SEC QD 7.0 I NW OF PLU ’ 2P
11E ALES 2111204
0000 FEET DEPTH CLASS 00
00630
00625
ØHOS—TOT
DATE
TINE
DEPTH
N0? NO3
TOT
PcJEL
w1i3—N
PHOS—DLS
FPOM
OF
N -TPTAL
N
TOTAL
ORTHO
P
MG/L P
TO
DAY
FEET
M ,/L
NG/L
MG/L
‘ G/L
74/11/17
14
00
0.008
1.600
0.060
75/01/19
15
00
0.400
0.300
0.015
0.035
0.078
75/02/16
14
00
0.274
1.200
0.032
0.032
0.065
75/03/14
13
30
0.115
0.375
0.010
0.030
75/04/19
12
00
0.045
1.150
0.020
0.030
0.030
75/05/16
09
00
0.010
0.250
0.035
75/0611P
0.015
0.250
O.0?0
0.035
75/06/2
13
00
0.040
0.950
0.015
0.005
0.090
75,07,11
14
30
0.060
2.200
0.045
0.060
0.075
75/07/27
13
35
0.040
0.030
0.060
0.060
75/09/13
ii
15
0.020
1.100
0.025
0.045
-------
SlOPEr ETPIEVAL DATE Th/08/25
NAIL EUIP0PbTCATI0 . cu vEv
EPA — LAS VEGAS
16030A AS16 O3OA
47 33 10.0 116 12 00.0 4
WALLACE
15 P( LLOGG
T/COEUR D’ALENE PES
COEUP D’ALENE PES
ILEPALES 2141204
0000 FEET DEPTH CLASS 00
00 30
DATE
TIME
DEPT -
N0? NO3
FQ0 ’
OF
N—T(’TAL
TO
OAV
FEET
MG/L
p014000
130391
75/01/23 12 45
75/01/04 16 00
75/03/24 14 30
75/04/25 11 00
75/05/20 14 30
75/06/24 11 00
75/08/20 15 00
75/09/23 13 30
75/10/20 15 30
75/11/17 16 00
00665 50051
PHOS—TOT FLOW
RATE
MG/L P INST MGD
00625
TOT KJEL
N
MG / L
6.500
4 • 900
4.150
4.700
5.200
4 • 700
4 • 300
5.000
8.600
9.600
O • 960
0.080
0 • 800
0.550
0.600
0.400
1.400
1.570
1.100
1.175
00610
Nb3—N
TOTAL
1 .950
0.110
1 • 280
0 • 520
0.150
0.110
0 • 690
0.770
0.722
0 • 125
00671
PHOS—DIS
O T O
MG/L P
1.600
0 • 770
0 • 860
0.910
1 .050
2.200
2.400
2.150
2.200
2.200
1.500
1.525
1.900
1.400
1.400
2 .600
2.700
3.000
2.950
50053
CONDUIT
FLOW-MC,D
MONTHLY
2.600
3.140
5.500
4.200
5.500
5.000
2.470
?. 470
2.520
3.000
3.000
6.500
5.800
5.500
5.800
4.700
2.600
2.340
2.340
3.150
-------
0029OO
STO ET PETPIEVAL DATE 76/08/25
NAIL EUTR0Pr IC4TION suPvEY
EPA- iA VEGAS
1603E4 PD16 O3EA
47 19 30.0 116 34 50.0 4
ST MAPlES
16 15 ST AP1ES
T/COEUD D’ALENE PES
ST JOE PI\,E9
IIEDALES ?141204
0000 FEET DEPTH CLASS 00
01)630
00625
DATE
TIME
DEPTH
NO? , ,NO3
TOT KJEL
Wr13—N
PHOSDIS
FPOM
OF
‘J TOTAL
1 ’4
TOTAL
0 THO
TO
t AV
FEET
MG/L
G/L
HG/L
G/L
130)Q1
75,03,06 16 00
7S/04/09 09 00
75/04/30 0 00
75/05/30 13 20
75/09/15 15 00
75/09/30 15 40
75/10/14 10 00
7 /10/20 09 00
75/10/28 05 30
75/11/03 10 1
75/11/17 09 0°
7/12/02 08 15
75/12/16 10 15
0 • 160
0.560
0.500
0.350
0 • 1 25
0 • 125
0.200
(1.700
0. 325
0.600
0 • 825
0.425
0.350
9.500
5.800
5.300
6.400
7 • 900
13. 500
15. 50 0
37. 000
17.000
15.500
11.000
9.200
11.000
2.400
‘0.240
0.51(
0 .830
1.450
1.500
2.500
4.700
3.200
2.400
1.400
1.800
1.950
00665
PHOS—TOT
UG/L P
2.000
1.800
2.100
2.200
3.200
3.300
4.900
8.200
5.000
5.250
3.100
3.200
2.500
1.700
0. 320
1 .580
1 .950
2.880
2.800
3.500
5.500
4.000
4.300
2.600
2.630
2.100
50051
FLOW
PATE
INST MGI)
2.000
1.500
1.500
1 • 250
0.500
0.500
0.500
0.500
0 • 500
0.500
0. 500
0.500
0 • 500
50051
CONDUIT
Ft OW—MGD
HONTHLV
2.000
1.500
1.500
I .2 0
0.500
0.500
0.500
0.500
O • 500
0.500
0.500
0.500
0.500
-------
cTI,DET PFT 1EVAL DATE 7F./0R,?5
NATL UTPOP UCATiO SuRVEY
EPA— 1 AS VEGAS
DATE
Fc Ou
To
TIME
OF
DAY
P000344
16 03GA PD16 O3GA
47 19 50.0 116 5 40.0 4
PLUMMER
IA 15 PLU MEQ
T/COEUP D’ALENE RES
PLUMMER CREEK
I IEPAL ES 21412 0
0000 FEET DEPTH CLASS 00
00630
DEPTH N921,N03
J-TOT AL
FEET G/L
0 • 160
o • 320
0 .4 0
0.150
O • 150
0 • 175
00625
TOT KJEL
N
UG/L
9.700
9.500
8.100
12.000
18.000
15.000
75/02/23
75/0 3/27
75/05/28 12 00
75/06/16 13 00
75/08/05 17 30
75/10,27 00 00
K VALUE KNOWN TO BE LESS
THAN INDICATED
00610
Nh3-N
TOTAL
MG/L
2.100
1 • 900
0.670
1 • 100
1 • 200
0.430
00671
PHOS—DIS
PHOS—TOT
FLOW
CONDUIT
Ow—MGD
DPTHO
RATE
Ft
2.5A0
2.500
5.600
0.250K
8.700
7 • 000
3.400
3.700
6.300
9.200
10.500
9.600
-------
P000 300
5TO ET PhT-4L vAL .J It- ( /IJ / ”)
&TL EUTI 0P ICATIO S’J vEY
EPA- LAS VEGAS
00630
00625
00610
DATE
TIME
DEPTH
NO2 MO3
TOT KJEL
JH3—N
F O’
OF
N—TOTAL
N
TOTAL
O
OA’
FEET
MG/L
MG/L
160321 N0160321
47 27 40.0 116 65 40.0 4
HARP I SON
16 15 PLI.9IMER
D/COEUR D’ALE E PES 130391
COEUR O’ALENE RES
1 IEPALES 2141204
0000 FEET DEPTH CLASS 00
75/01/28 10 10
75/02/28 10 30
75/03/29 10 30
75/04/28 10 15
75/07/14 lB 00
75/08/01 10 30
75/08/29 10 30
75/09/29 10 45
75/10/28 10 15
75/11/29 10 30
76/01/05 10 00
76/01/28 14 00
76/02/27 14 15
2 • 080
?. 000
2.320
2.300
0 • 175
0 • 350
O • 250
0 • 200
O • 300
0.150
0.675
0.050
0 • 825
1.400
2.100
1.000K
1.200
15. 700
21.000
22.000
26 • 000
14. 000
24.500
14. 500
13. 000
9.000
00671
PHOS—DIS
OPT HO
MG/L P
0 • 370
0.440
0.470
0.560
2.500
2.400
2.300
2.900
1 • 880
2.300
1.700
1.800
1 • 100
0.240
0 • 590
0 • 890
0 • 120
0 • OSO
2.300
0.975
2 • 800
0 • 820
7.700
0 • 750
1 .400
o • 190
00665 50051
PHOS—TOT FLOW
PATE
MG/L P INST M 0
0.550
0.630
0.550
0 • 720
5.900
4.500
4.400
5.300
3.700
3.650
3.275 0.300
2.700
2.000
50053
CONDUIT
FLOI-MC,D
MONTHLY
0.300
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 ranking, by parameter,
of each lake relative to the others. Median total phosphorus, median
inorganic nitrogen and median dissolved orthophosphorus levels are
expressed in mg/l. Chlorophyll a values are expressed in pg/i.
To maintain consistent rank order with the preceding parameters,
the mean Secchi disc depth, in inches, is subtracted from 500.
Similarly, minimum dissolved oxygen values are subtracted from 15
to create table entries.
-------
LAKE
DATA TO BE USED IN RANKINGS
LA (E
CODE
LAKE NAME
MEDIAN
TOTAL
P
MEDIAN
INORG
N
500—
MEAN SEC
MEAN
CHLORA
15—
HIN DO
MEDIAN
DISS ORTHO
P
1601
AMERICAN FALLS RESERVOIR
0.105
0.080
463.800
15.379
14.700
0.035
1602
CASCADE LAKE
0.032
0.060
415.067
8.081
14.800
0.009
1603
LAKE COEUR 0•ALENE
0.017
0.040
380.348
10.391
12.200
0.005
1604
OWORSHAK RESERVOiR
0.010
0.080
401.866
2.420
7.400
0.009
1605
HAUSER
0.028
0,075
366.286
11.112
14.800
0.013
1606
HAYDEN LAKE
0.010
0.040
243.500
2.787
11.800
0.003
1607
ISLAND PARK RESERVOIR
0.034
0.050
391.778
9.322
12.800
0.012
1608
LAKE LOWELL
0.070
0.070
477.111
25.389
14.600
0.015
1609
MAGIC RESERVOIR
0.062
0.130
‘.00.750
7.322
14.700
0.020
1610
PALISADES RESERVOIR
0.024
0.080
345.428
2.067
12.800
0.007
1611
LOWER PAYETTE
0.013
0.060
234.000
4.600
9.600
0.007
1612
LOWER TWIN LAKES
0.016
0.050
370.000
2.318
13.600
0.009
1613
UPPER TWIN LAKES
0.017
0.045
369.143
4,986
8.200
0.004
-------
PERCENT OF LAKES WITH HIGHER VALUES (NUMBER OF LAKES WITH HIGHER VALUES)
LAKE MEDIAN MEDIAN 500— MEAN 15— MEDIAN
CODE LAKE NAME TOTAL P INORG N MEAN SEC CHLORA MIN DO DISS ORTHO P
1601 AMERICAN FALLS RESERVOIR 0 ( 0) 17 ( 1) 8 C 1) 8 C 1) 21 C 2) 0 ( 0)
1602 CASCADE LAKE 33 ( 4) 54 C 6) 17 ( 2) 42 ( 5) 6 ( 0) 50 ( 5)
1603 LAKE COEUR D’ALENE 67 C 8) 96 C 11) 50 C 6) 25 ( 3) 67 C 8) 83 C 10)
1604 OWORSHAK RESERVOIR 96 C 11) 17 C 1) 25 1 3) 83 ( 10) 100 1 12) 50 ( 5)
1605 HAUSER 42 ( 5) 33 ( 4) 75 1 9) 17 1 2) 4 C 0) 25 C 3)
1606 HAYDEN LAKE 96 ( 11) 96 C 11) 92 1 11) 75 ( 9) 75 1 9) 100 1 12)
1607 ISLAND PARK RESERVOIR 25 C 3) 71 C 8) 42 C 5) 33 ( 4) 54 ( 6) 33 1 4)
1608 LAKE LOWELL 8 C 1) 42 ( 5) 0 C 0) 0 1 0) 33 ( 4) 17 C 2)
1609 MAGIC RESERVOIR 17 C 2) 0 1 0) 33 1 4) 50 C 6) 21 ( 2) 8 1 1)
1610 PALISADES RESERVOIR 50 C 6) 17 C 1) 83 1 10) 100 1 12) 54 1 6) 75 1 9)
1611 LOWER PAYETTE 83 ( 10) 54 1 6) 100 C 12) 67 ( 8) 83 C 10) 67 C 8)
1612 LOWER TWIN LAKES 75 1 9) 71 C 8) . 58 1 7) 92 C 11) 42 ( 5) 50 1 5)
1613 UPPER TWIN LAKES 58 1 7) 83 1 10) 67 C 8) 58 1 7) 92 C 11) 92 1 11)
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