RIVER BASIN WAJE* QULALITY
STATUS REPORT
Spokane River Basin
ENVIRONMENTAL PROTECTION AGENCY
SURVEILLANCE AND ANALYSIS DIVISION REGION X SEATTLE WASHINGTON
1975
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TABLE OF CONTENTS
FIGS. PAGE
PROFILE OVERVIEW
Introduction to Report
p
Introduction to the Basin
Basin Map 0-1 4
Basin Graphs 0-2 thru 0-4 5
Findings & Conclusions 8
-Ambient Profile Section 8
-Source Profile Section 9
-Cause & Effect Relationships Section - 1°
Profile Reference List 14
BASIN DESCRIPTION
Basin Description 17
Basin Map BD-1 18
Coeur d'Alene Sub-Basin Summary Sheet 19
Coeur d'Alene Sub-Basin Map BD-2 20
Coeur d'Alene Lake Sub-Basin Summary Sheet 21
Coeur d'Alene Lake Sub-Basin Map BD-3 22
Spokane River Sub-Basin Summary Sheet 23
Spokane River Sub-Basin Map BD-4 24
AMBIENT PROFILE
Ambient Profile Introduction and Findings&Conclusions 25
Graph Set No. 1 - Rose Lake Trends AP-1 to AP-4 28
Graph Set No. 2 - Spokane River Station Trends AP-5 to AP-11 33
Graph Set No. 3 - Chlorophyll A @ Long Lake AP-12 41
SOURCE PROFILE
Source Profile Introduction & Summary TABLE SP-1 43
Municipal Point Source Inventory Data Table TABLE SP-2 44
Industrial Point Source Inventory Data Table TABLE SP-3 45
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TABLE OF CONTENTS
FIGS
CAUSE & EFFECT RELATIONSHIPS
Basin Discussion and Findings&Conclusions 46
Coeur d'Alene Sub-Basin Section 54
Graph Set No. 1 - South Fork Coeur d'Alene 55
River river mile graphs
EPA-July, 1974 CE-1 to CE-12
- EPA Livebox Study Graph CE-13 67
- Leakage & Loadings Graphs
Bunker Hill/South Fork
Coeur d'Alene River CE-14 to CE-16 68
Coeur d'Alene Lake Sub-Basin Section 72
Overview CE-17 73
Supporting Lake Proper Data Presentation 76
Graph Set No. 2 - Coeur d'Alene River
at Rose Lake CE-18 to CE-23 77
Graph Set No. 3 - St. Joe River at
St. Maries CE-24 to CE-30 83
Graph Set No. 4 - Spokane River at
Post Falls CE-31 to CE-37 91
Graph Set No. 5 - Lake Mass Balance
Graphs CE-38 to CE-43 99
Lake Proper Data Presentation 106
Graph Set No. 6 - Coeur d'Alene Lake CE-44 to CE-93 113
Spokane River Sub-Basin Section 179
Graph Set No. 7 - Spokane River river
mile graphs CE-94 to CE-108 180
Graph Set No. 8 - Hangman Creek Station
Trends CE-109 to CE-122 196
Graph Set No. 9 - Little Spokane River
Station Trends CE-123 to CE-136 211
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PROFILE SUMMflRV
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INTRODUCTION TO REPORT
Describing the water quality of the Spokane River Basin is a
somewhat unique task in that it actually involves three water systa
or sub-basins, as shown in Figure 0-1. The upper sub-basin includes
the Coeur d'Alene River and the St. Joe River. The middle sub-basin
encompasses Coeur d'Alene Lake and the lower covers the mainstem o
the Spokane River, including the Little Spokane River and Hangman Ci
Accordingly, this report is organized by sub-basin and the individui
sections provide an in-depth analysis and summary of their respectii
water qualities.
The objective of this part of the profile is to introduce the
report and the entire basin in the most concise and summarized foini
possible. Included in it are a short discussion of the most import!
water quality problems accompanied by three illustrating figures an:
listing of findings and conclusions.
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ABSTRACT 2
OVERVIEW OF THE BASIN
Initial inspection of the data presented in this profile indicates
that hiohly variable flow conditions occur in the basin and have a
major influence upon the water quality in the Spokane River Basin.
Figure 0-2 illustrates high and low flow conditions and visually
provides a scale for comparison, indicating a 10 to 1 proportionate
relationship. In addition, each flow must be plotted on a log scale
due to the tremendous range each involves. These factors have a direct
impact on the other prominent water quality parameters.
Heavy metals loadings are a definite, definable problem in the
basin, especially in the Coeur d'Alene sub-basin. Zinc can be used
to illustrate the role heavy metals play and Figure 0-3 has been
included for this purpose. The heavy metals originate on the Southfork
of the Coeur d'Alene River where numerous mining operations are active,
the largest of which is the Bunker Hill Company. Treated and untreated
mine wastes, non-point source tailing pond leakages, and groundwater
inflows with high metals concentrations are the primary source that
must be considered in the resolution of this problem.
The net effect of these various sources is significant in quality
as well as quantity. The Coeur d'Alene River below the mining district
is generally toxic to salmonoid fishery during both low and high flow
periods. Coeur d'Alene Lake acts as a settling basin and removes a
portion of the loadings, as the zinc graph, Figure 0-3, indicates.
The waters of the St. Joe River in addition help dilute the metals'
concentrations as they travel through the lake. As a result of these
two factors, the waters leaving the lake and forming the Spokane
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River are not especially toxic to a salmonoid fishery, but may be hi§
enough to affect other aquatic biota.
Nutrient loadings originating from both municipal and industrial
point sources on the mains tern of the Spokane River as well as ground-
water inflow loadings have a significant'On the river. The phosphon
graph, Figur 0-4, has been included to illustrate nutrient character!
During high flow conditions, natural processes raise the 3 month medi
phosphorus concentrations in the Coeur d'ATene River above the potent
algal bloom level while the Spokane STP's effluent, by far the large
phosphorus point source in the basin, is diluted to a level below all
bloom potential. The lake acts as a sink for phosphorus during high
due to the close relationship phosphorus has with the suspended solii
traveling downstream which settle out upon reaching the lake. The
phosphorus graph during the 3 month low flow period clearly indicate:
the Spokane STP to be the primary source of phosphorus in the basin,
Concentrations abruptly exceed the potential algal bloom level by a
substantial margin below'the STP outfall. Algal blooms downstream
of Spokane in Long Lake are present although the heavy metal concen-
trations act somewhat as a deterant to their potential level of gra
Nightly algal respiration depresses Dissolved Oxygen concentrations
in Long Lake ; thereby, significantly reducing the quality of the Sf
River.
1 R.A.Soltero, An Investigation of the Cause and Effect of Eutrophii
in Long Lake, Washington, Eastern Wash. State College, Dept. of B;
Cheney, Wash. 99004 7/1/73 p. 76-77.
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COEUR D'ALENC RIVER
SUB-BASIN
CHATTROY
Dttp
COLBERT
UPPER
FALLS .
DAM '
SPOKANE
DAM ...
NIKS' MILES
FALLS OAM
MOHROE ST,
DAM
SPOKANE RIVER SUB-BASIN
COEUR D'AUENE LAKE
SUB-BASIN
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3
T
R
M
F
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W
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C
F
9
SPOKANE RIVER BASIN
APR THRU JUN 1.874. MEDIAN DATA
MIOH FUOW CONDITIONS
FIGURE 0-2
5
SPOKAflE RIVER
LAKE
CD til
t D
^Z
_ ST.. TOE JOTEB
Ma i ns tern
OOEUB D ALfini
RIVTR
North Fork
Coeur d'Alene
South Fork
Coeur d1Alene
60 712 60 BO Igf IL0 120 L32J 3.4O 133
H 1 h
170 ISO 1S0 220
9
T
R
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SEP THRU NOV LB74- MEDIAN DATA
LOW FLOW CONDITIONS
RJVZH
LUG
COEl
R D
STJOEHT
._. Ma ins tern
°-«:OEUH D AlEITC 1U1
VER
3North Fork
Coeur d'Alene
South Fork
•j——° Coeur d1 Alene.
CO 70 03 EiJ L£03 1. US 1213 LO23 i-,u l:M 1Q-3 170 ^ , ^ ^
MILC3 FROM MOUTH OF TUE. 3 P o K. A N E
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3FOKANE RIVER BASIN
APR THAU JUN 1874. MEDIAN DATA
mow
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T*-iiin —"*•*— uvra
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FIGURE 0
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— i-*3 North Fork Coeur d
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THRU NOV 1874- MCDIAN DATA
LOW *tJ3U CONDITIONS
STOKJOt JUVTB
Cpnc_._ ^ £0_ub/l
South Fork
Coeur d'Alene
M i-n i ng
Activi ties
North Fork Coeur d'Ale
6B 70 O0 B0 1£O L10 1?PI 139 140
. ntUC3 FROM MOUTH OF THC 3rOKAN£ RIVER
I - !
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•.10-r
SFOKANE RIVER BASIN
API* TMWJ JTJN 1O74nEDIAN .DATA
MI OH ri-OW CONDITIONS
JIGURE 0-4
T
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u-
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n
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a North Fork
Coeur d 'Alei
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sirt±°——if^——4-—
70 OB) -S3 icia 110 -izsa isa 1*0 120 iaa 170 i
SCF TMRU NOV 1BT4. MEDIAN DATA
L.OU FLOW CONDITIONS
South Fork
Coeur d'Alene
Mining Actlvl
U(«l Blooa Potential Urol
CODLni D'lLEXt RTVCT
70 aa as UZB
103 ITOJ ica
nouTH OF THC SPOKANC RIVER
L I
Coeur d'Aler
CO
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a
SUMMARY OF
FINDINGS AND CONCLUSIONS
The findings and conclusions in this profile are presented in
two different formats; a) they are listed in summarized form according
to their respective sections in this Overview Section, and, b) they
are explained in more specifics immediately prior to their respective
sections in the main body of the report. In both formats the findings
and conclusions are divided according to sub-basins.
AMBIENT PROFILE SECTION
Coeur d'Alene Sub-Basin
1. Total Phosphorus concentrations at Rose Lake on the mainstem
Coeur d'Alene River have been reduced since 1968 due to the
installation of municipal and industrial treatment facilities
on the South Fork Coeur d'Alene River.
2. Diminishing Zinc concentrations during low flow periods at
Rose Lake on the Mainstem Coeur d'Alene River are indicative
of reduced mine discharged pollutants.
Spokane Sub-Basin
1. Ammonia concentrations appear to be increasing at the station
below Long Lake.
2. Nitrate (N02+N03) concentrations fluctuate throughout the
trend period, but consistently exceed the level for potential
algal bloom at the station below Long Lake. They fall below
that level downstream at the Stateline station.
3. The station monitored below Long Lake indicates phosphorus
concentrations continue to increase while both it and the
Staeline monitoring station continue to exceed the level for
potential algal bloom.
4. Bacteria levels have been increasing significantly throughout
the sub-basin; however, we can expect a turnabout due to new
treatment facilities' installations upstream. Present levels
exceed Washington Water Quality Class A Standards.
5. The latest Long Lake Chlorophyll A data trends indicate that
the water quality is worsening, especially during the summer
to fall period with highly mesotrophic to eutrophic conditions
existing year round.
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SUMMARY OF
FINDINGS AND CONCLUSIONS
SOURCE PROFILE SECTION
SPOKANE RIVER BASIN
POINT SOURCE LOADINGS SUMMARY
% Municipal/Industrial Table
LB/D
Phosphorus 3400
Nitrate 6875
Suspended Solids 29,334
BOD 28,190
Combined Heavy Metals 3655
Sub-Basin Contribution Table-
%Phos
TABLE
%I %M
34 66
16 84
34 66
18 82
100 0
%N03 %SS %BOD
Coeur d'Alene Sub-Basin 8.2 5."5 9.7 30.8
Coeur d'Alene Lake Sub-Basin 1.3 .5 1.2
Spokane Sub-Basin 90.5 94 89.1 69.2
Major Municipal & Industrial Contributors Table
%Phos
MUNICIPAL - Spokane STP 48.9
INDUSTRIAL - Bunker Hill Co.
%N03 %SS %BOD
67.2 52.9 61.5
1
XCHK
100
%a
95,
/- = negligible
/CHM = Combined Heavy Metals - Pb, Cd, Hg, Sb, Zn
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10
SUMMARY OF FINDINGS & CONCLUSIONS
CAUSE AND EFFECT SECTION
Coeur d'Alene River Sub-Basin
1. The problems in this sub-basin occur in the Southfork and
Mainstem Coeur d'Alene River. The Northfork Coeur d'Alene
River has very good water quality as it flows through the
Coeur d'Alene National Forest showing little degradation from
man related activities.
2. Heavy metals loadings from mining activities in the Southfork
Coeur d'Alene basin are the major cause of water quality
problems in the Coeur d'Alene Sub-basin.
a) The Bunker Hill Company is the major contributor of
heavy metals in the basin. They are directly
responsible for high levels of zinc, cadmium, lead,
and in addition iron, fluoride, and phosphorous.
b) It is apparent that the majority of zinc and cadmium
loadings originate from uncontrolled tailing pond
leakage and unpermitted discharges from the Bunker
Hill Company.
c) The highest levels of arsenic and antimony were
found downstream of the Sunshine Mining Company
operations on Big Creek.
d) Toxic levels for trout due to high metals concen-
trations extends from the Southfork Coeur d'Alene
River near Wallace downstream through the mainstem
and part of Lake Coeur d'Alene.
3. Phosphorous levels in the Southfork Coeur d'Alene River exceed
algal bloom potential level below the Bunker Hill Company discharges,
Coeur d'Alene Lake Sub-Basin
*Entering Lake - Coeur d'Alene River
1. Phosphorous concentrations entering Coeur d'Alene Lake (at Rose
Lake) appear to be directly proportional to flow, indicating
erosion as the major source.
Zinc concentrations entering Coeur d'Alene Lake (at Rose
appear to be inversely related to flow, indicating point
groundwater, and/or tailing pond leakages as the major sc
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SUMMARY OF FINDINGS & CONCLUSIONS U
CAUSE AND EFFECT SECTION
Coeur d'Alene Lake Sub-Basin (cont)
*Entering Lake - St. Joe River
3. There were no serious water quality in the St. Joe river at
the sampling site tested (near St. Maries). However, there
were two discharges downstream of this station in the slack
water reach which may contribute some nutrient loadings to
the Lake.
*Lake Proper
4. During 1974, Coeur d'Alene Lake functioned as a sink for
phosphorous, zinc, lead, and cadmium; and as a source for nitrogen.
5. Detention times for inflowing waters from the Coeur d'Alene
River and the St. Joe River have been calculated to be within
the range of 40 to 120 days.
*Leaving Lake - Spokane River
6. Total phosphorous concentrations leaving Coeur d'Alene Lake
(at Post Falls) exceeded the 0.05 mg/1 concentration considered
minimum for algal blooms from February thru April of 1974
(high flow period).
7. Zinc concentrations leaving Coeur d'Alene Lake (at Post Falls)
exceeded levels considered toxic for a salmonoid fishery
(300 ug/1) for nearly half of 1974. All concentrations exceeded
the algacidal level (80 ug/1) throughout 1974.
Spokane River Sub-Basin (Oct. 1972 to Sept. 1973 Data)
Mainstem Spokane River
1. The Spokane STP, Hangman Creek, the Little Spokane River, and
groundwater inflows in the Spokane area have significant
impact on the water quality of the Spokane River.
2. Turbidity levels increase significantly due to the inflow of
Hangman Creek during the high flow period. The turbidity
decreased as it settled out in Long Lake.
3. Dissolved Oxygen concentrations violated Washington Water Quality
Class A standards below Long Lake during the low flow period
due to eutrophic conditions in the Lake and algal activity.
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SUMMARY OF FINDINGS & CONCLUSIONS 12
CAUSE AND EFFECT SECTION
4. Total phosphorous and dissolved ortho-phosphorous levels
exceeded the potential algal bloom concentration downstream
of the Spokane STP during both high and low flow periods.
The Spokane STP is the major source of phosphorous in the
Spokane River. In addition, Hangman Creek is a significant
source of total phosphorous during the high flow runoff.
5. Nitrate concentrations exceed the potential level for algal
blooms below Hangman Creek during high flow periods due to
non-point source loadings from runoff. During low flow
periods, nitrate concentrations exceed the potential level
for algal blooms from the area above Spokane downstream through
Long Lake due to groundwater inflows in the Spokane area.
6. Ammonia and kjeldahl nitrogen levels significantly increase
below the Spokane STP during both the high and low flow periods,
7. High zinc concentrations from the upper reaches of the Spokane
River were diluted by groundwater inflows and tributaries
to such an extent that by the time they reach Long Lake they
were below the general salmonoid fishery toxic level (300u,g/l)
during both high and low flow periods and below the algacidal
level (80 ug/1) during the low flow period.
8. Total Coliform counts exceeded Washington Class A Water Quality
Standards as they entered Washington and continued to exceed
standard levels downstream to Long Lake during both high and
low flow periods. The waters leaving Long Lake were within
standard levels.
Hangman Creek
9. Hangman Creek enters the Spokane River at river mile 74.2 and
is predominately influenced by seasonal runoff.
10. Highly variable flow is an important characteristic of the
stream as it ranges from 2 to 400 cfs and greatly influences
water quality. Turbidity is directly related to flow, ranging
from 0 to 1050 JTU. Non-point source runoff from agricultural
lands resulted in high concentrations of nitrate, ammonia,
phosphorous, and bacteria during high flow.
11. Nitrate concentrations exceeded the potential level for algal
blooms the entire year while phosphorous and dissolved ortho-
phosphorous concentrations exceeded it during moderate to
high flow periods only.
12. pH values exceeded the Washington Class A Standard the period
of April through July.
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13
SUMMARY OF FINDINGS & CONCLUSIONS
CAUSE AND EFFECT SECTION
Little Spokane River
13. The Little Spokane River enters the Spokane River at river
mile 56.3 and in contrast with Hangman Creek it is pre-
dominately influenced by groundwater inflow.
14. Between the mouth of the Little Spokane River and the city
of Wandermere, flow measurements indicate that 200 to 250 cts
of groundwater inflow are present.
15. Nitrate concentrations exceeded algal bloom potential level
the entire year and the major source appears to be groundwater
inflow.
16. Total phosphorous concentrations exceeded algal bloom potential
level during the high flow periods (Dec-March). Dissolved
ortho-phosphorous levels exceeded it for most of the year.
Phosphorous levels are directly related to river flow
indicating the contribution to be of non-point source origin.
17. Bacteria levels exceeded the Class A Standard throughout most
of the year with the highest levels occuring during the
high flow period of December through March.
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14
REFERENCES, CLASSIFICATIONS, AND WATER QUALITY INDICATORS
This section of the profile attempts to explain the various water
quality standards, interpretations, and classifications as they appear
throughout the data presentation. In June of 1973 the Department of
Ecology of the State of Washington released a document that related
every natural water system to a set of water quality criteria. These
Water Quality Standards and their respective river systems appear on
the following page. Following that are a number of additional water
quality indicator levels taken from referenced literature.
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(iv) Stock k-aterJr.9.
(v) Con.-crc« tnj n^vl^at
(eribi, chrl-p, etc.) hirvrat.
(c) Vattr t;i.a)ity rrllcr
(1) Totnl^ol 1 fcrj-i ntean
when a^-oclatad vlth any (oc«l •» '«.
(11) Dl^iolvrd cr^-n-n shall exceed «.J »^/l (fre-S
vater) or S.u r j/I (TJ?InVwater) . or 101 »»;t*iflMs«, w«il
•vor li greater.
point of acrpl,. collection!
(Iv) Ter-i^rav.-ro - --ater tcrp? rft'.^r-ra 1^*11 rot txi
70* r. (fresh voter i""or C5* r. (rari'e witct) Cje In fti
turoble O,i* r,| i-.rrcaici rcsultir? frc^ h.-J-* ect.
.
and r«arin7. and
i thall B«t •«?•»<
110/(T-1SJ Urciji wst-;rPer*tC
purpojei hereof *t" rcprcsenti
repr"3«nt3 the water ter^craiu
*rrjliiivc ir.cr«*ie
> to all cau^o cc-J
>?« of (.» to I.S C
tcr) vlt-h •» Induced Taj
i 10 JTO or«r n«t»i
aM '
litd.
r-:fi
-------
HATER QUALITY CRITERIA REFERENCE TABLE
INDICATED MEASUREMENT | ENVIRONMENTAL IMPACT
REFERENCE
Ammonia NHr»5«n(NH3-N)
Cadmium
Chlorophyll-A
Lead
Nitrate-Nitrogen
Phosphorus, Dissolved Ortho
Phosphorus', Total
Z1nc, Total
.2 mg/1
30 ug/1
3 ug/1
less than 3 mg/1
between 3 and 20 mg/1
more than 20 mg/1
30 ug/1
.3 mg/1
.01 mg/1
.05 mg/1
300 ug/1
Organic Pollution Level
Generally Toxic to Aquatic Life
Toxic to Salmonold Eggs
Oligtrophlc
Mesotrphic
Eutrophic
Generally Toxic to Aquatic Life
Algal Bloom Potential
Algal Bloom Potential
Algal Bloom Potential
Approximate Algacidal Concentration
for Selenastrum Capriconutum
Klein,L. River Pollution 1., Chemical Analysis
Academic Press Inc., New York 1959
Sawyer,C.N., Factors Involved in Disposal of
Sewage Effluents to Lakes, Sewage and Industrld
Wastes. Vg.1. 26 No. 3 pp7317-325 1954
EPA R3.73.033 Ecological Research Series.
Water Quality Criteria 1972, U.S.Government
Printing Office, March 1973 p. 180
Vollenweider, Dr.R.A. , Hater Management Re--
search-Scientific Fundamentals of the Eutro-
fication of Lakes and Flowing Waters with
Particular Reference to Nitrogen and Phos-
phoruiT as Factors in Eutrophication , DAS/CSI/
68.27, Organisation For Economic Cooperation
And Development - Directorate For Scientific
Affairs, 1968 p.40
EPA R3.73.033 op.dt. p.181
Klein op.dt.
Sawyer op.dt.
Klein op.cit.
Sawyer op.cit.
Klein op.cit.
Sawyer op.cit.
Green, et.al National ^utrophicatlg'n Research
Program, ReporTTo Region X-On TTie .Results Of '
The Spokane River Algal Assays , Corvallis, Ore
19737
r*;^e^^£??^^
-------
BflSIN DESCRIPTION
-------
17
BASIN DESCRIPTION-SPOKANE RIVER BASIN
The Spokane River Basin encompasses an area of approximately
6,640 square miles and is located in northern Idaho and northeastern
Washington, Figure BD-1. The basin's roughly elliptical shape has
its main axis running southeast to northwest.
The basin's main stream, the Spokane River, Figure BD-2, is fed
by two major tributaries which discharge into and are buffered by
Coeur d'Alene Lake, Figure BD-3. These two streams, the Coeur d'Alene
River and the St.Joe River, Figure BD-4, discharge into the southern
portion of the lake and have proportionate flows of 1 to 1 to .5
respectively. Any further physical comparison of similar attributes
ends here however as their water qualities differ significantly. The
Coeur d'Alene River drainage basin consists of two sub-drainages; the
South Fork Coeur d'Alene River draining the mining district and the
North Fork Coeur d'Alene River traversing the Coeur d'Alene National
Forest. The waters of the St.Joe River are free of mine wastes but have
been affected to some extent by sewage disposal, logging, and farming
activities. The Spokane River is the only surface outlet of»Coeur
d'Alene Lake.
The stretch of the Spokane River above Spokane, the St.Joe River,
andthe North Fork Coeur d'Alene River support excellent sport fisheries
and can be classified as having good water quality. In contrast the
Mainstem and South Fork Coeur d'Alene River and the Spokane River
below Spokane are subject to the serious effects of municipal and
industrial pollutants, including a reduced diversity of biota.
As early as 1885 wastes from the Coeur d'Alene mining district
have been transported by the waters of the South Fork and Mainstem
Coeur d'Alene River into Coeur d'Alene Lake. An extensive survey by
Ellis in 1932 showed the Coeur d'Alene River to be devoid of life from
the city of Wallace to its mouth and the delta to be deficient in
phytoplankton, fish, and bottom organisms.
The effect of increasing population and inadequate municipal sewage
treatment facilities can be seen in Coeur d'Alene Lake by the exten-
sive growth of blue-green algae and macrophytes, in shallower portions.
The Spokane River below Spokane also suffers from oppresive municipal
pollution; most notably from BOD, phosphorus, and suspended solids
loadings. In addition, natural groundwater contributes significant
nitrate loadings.
Maps of each of the three sub-basins will follow the summary sheets
outlining pertinant facts related to that sub-basin.
-------
I. i
CMVIRONMCNTM. PROTECTION AGENCY
W£jQH |
SPOKANE RIVER BASIN
en
CO
7
-------
19
COEUR D'ALENE SUB-BASIN
The sub-basin encompasses the South Fork Coeur d'Alene River
from the city of Mull an to its mouth and the Mainstem to its con-
fluence with Coeur d'Alene Lake. The major emphasis is on the "heavy
metal and phosphorus loadings from the Coeur d'Alene mining district
as they appear to be the major constituents causing water quality
degradation in the sub-basin. Groundwater leaching of old deposits
and tailing pond leakage contribute significantly to loadings of
heavy metals in the sub-basin.
Mainstream Mileage - RM 131.3 -
Flow-yearly mean--Mainstem Coeur d'Alene River @ Cataldo
High 15,000 - 20,000 cfs
Low 300 - 400 cfs
South Fork Coeur d'Alene @ Smelterville
High 2,000 - 4,000
Low 90 - 130 cfs
Waste Sources - Municipal = 14
Industrial 5
19
Largest-City - Kellogg-3,800
-------
FIGURE BD-2
MAP OF THE COEUR D'ALENE BASIN
-------
21
COEUR D'ALENE LAKE SUB-BASIN
This sub-basin encompasses Coeur d'Alene Lake from the mouth of
the Coeur d'Alene River and the St.Joe River to its outlet near the
city of Coeur d'Alene. The threefold emphasis in this report includes
a) General water quality conditions
b) Hydrodynamics of the lake in relation to detention times of
the waters of the Coeur d'Alene River and the St. Joe River.
c) Hydrodynamics of the lake in relation to the lake's role as a
buffer for certain water quality parameters between the
Coeur d'Alene sub-basin and the Spokane sub-basin.
Mainstream Mileage - RM 110 - 135
Lake Volume - 2.5 Million Acre-feet
Flow, yearly mean - Post Falls- 10,000 cfs
Waste Sources - Municipal - 3
Industrial- 1
~4~
Largest City - Coeur d'Alene - 16,200
-------
FIGURE BD-3
22
COEUR D'UENE UKE, IDAHO
-------
23
SPOKANE RIVER SUB-BASIN
This sub-basin encompasses the Spokane River from the outlet of
Coeur d'Alene Lake to its mouth. Special attention is paid to mun-
icpal sewage, phosphorus, and related pollutants' loadings and their
effects on algal bloom occurences, especially below the city of
Spokane. Natural groundwater nitrate loadingsare also examined in
relation to the same problem.
Drainage Area - 3840 Sq.M.
Mainstream Mileage - RM 0-110
Flow-yearly mean - Post Falls- 10,100 cfs
Waste Sources - Municipal - 17
Industrial - 5
Largest City - Spokane- 171,000
Projected Populations For The Entire Basin
1980 2000 2020
447,900
619,200
826,800
-------
L.-J "^
FIGURE BD-4
MAP OF MAINSTEM SPOKANE RIVER AREA
_..,„ SPOKANE RIVER
-------
RMBIENT PROFILE
-------
AMBIENT PROFILE SECTION
CONTENTS
Graph Set 1 - Rose Lake Trends Figures AP-1 - AP-4
Graph Set 2 - Spokane River Station Trends Figures AP-5 - AP 11
Graph Set 3 - Chl-A Graph in Long Lake Figure AP-12
Flow is shown on each figure for the purpose of comparing the various
water quality parameters with flow in the basin.
-------
26
FINDINGS AND CONCLUSIONS
AMBIENT PROFILE SECTION
Coeur d'Alene River Sub-Basin
1. Total phosphorus concentrations have been reduced throughout
the year over the six year period from 1968 through 1974. The
change is due to a reduction in phosphorus discharged from the
Bunker Hill Company and collection and treatment of municipal
discharges in the South Fork Coeur d'Alene River area.
FIGURE AP-3, page 31.
2. Nitrate concentrations in the.Coeur d'Alene River at Rose Lake
show little change between 1968 and 1974. The concentrations
are well below the .3 mg/1 algal bloom potential level through-
out the year.
FIGURE AP-2, page 30.
3. Zinc concentrations in the Coeur d'Alene River at Rose Lake
show a significant reduction during the low flow periods of
the year when comparing 1968 io 1974. The largest improve-
ment occurs during periods of low flow indicating the result
of reduced point source discharges from the upstream mining
industries.
FIGURE AP-4, page 3Z. '
Spokane River Sub-Basin
1. Ammonia concentrations have increased significantly at the
station below the Long Lake Dam since 1972. The Stateline
station shows a slight increasing trend.
FIGURE AP-8, page 31.
2. Nitrate (N02+N03) has consistently maintained a high concen-
tration capable of sustaining algal blooms at the station
below Long Lake. The trends appear slightly increasing and
decreasing respectively at the Long Lake and Stateline stations
FIGURE AP-7, page 3l*.
3. Total phosphorus concentrations at the station below Long Lake
show a slightly increasing trend and have consistently
exceeded the 0.05 mg/l level for algal bloom potential. Total
phosphorus levels at Stateline are presently showing a slight
decreasing trend with current concentrations ranging below
the algal bloom level.
FIGURE AP-9, page 3%,
1 Data from STQRET WATER QUALITY DATA and EPA Discharge Monitoring
Reports
-------
FINDINGS AND CONCLUSIONS
AMBIENT PROFILE SECTION
Spokane River Sub-Basin (cont'd)
4. Bacteria levels at the Stateline station have been increasing
significantly. However, we can expect a turnabout due to the
instillation of new municipal treatment facilities upstream.
Present levels violate Washington Water Quality Class A
Standards.
FIGURE AP-11, page to.
5. The Chl-A levels indicate that highly mesotrophic to eutrophic
conditions presently exist in Long Lake. The 1973 levels are
most severe but there is not enough data to establish a trend
at this time. As expected the greatest algal productivity
period occurs during the warmest summer or early fall periods.
FIGURE AP-12, page 4Z.
-------
AMBIENT PROFILE
Graph Set 1
Figures AP-1 To AP-4
Coeur d'Alene River At Rose Lake
RM 153
28
-------
FIGURE AP-1
u
Q
U
O
r
9
RO3C UAKCV US03 DATA
MONTHLY AVtRAQt FLOW
1968
1974
JAN FES C-VSR
JLM OL1_ ALD
MONTHS
SO* OCT HCV
O
O
N
t>
U
O
T
I
V
s
T
V
U
M
M
O
X
O
r-i
UBB- -
RO9C I_A*C.-U303 DATA
MONTHLY AVQ CONCENTRATION •««.»l»<8
CONDUCTIVITY •——1974
JAN FTEO
H 1-
rvsr JUN
(-< C N T H O
-------
FIGURE AP-2~
L.
O
u
Itoac. CAKE.- uaoa DATA
MONTHLY AVtHAQt FLOW
1974
JVNN fTED
-)—f-
JUN ju_ ALD so* • oar NOV
MONTHS
U-AKC-U3OS CATA
MONTHLY AVO CONCENTRATION
MO£*NOJ NZTROOCN
.....1968
1974
H 1 1 ±-
JXM FED tVfl APK
JUN JUL ALO
MONTM»
CT TO/ TOO
cm-
-------
•SI--
AP-3
L.
O
w
O
r
RO9C LAKE^ U309 DATA
MONTHLY AVLrtAQC FLOW
1968
U74
JAN FED rvsn
JTJN JLJL.
MONTHS
OCT NCV CeD
T
O
T
A
N
O
»
r
H
o
R
O
u
a
M
a
KOSC. UAKC.-U303 DATA
MONTWUV AVO CONCENTRATION
TOTAU
-------
FIGURE AP-4 •
t_
o
w
o
f
ROM LjkKO U9O9 DATA
MONTHLY
*.-,.W
JAN ns
APR
JXJN JUL. AU9
nONTHB
H 1 1 1
aep • ocr NCV ce
r
z
N
O
O
o
taza- -
RO9C l_AKt-U303 DATA
nONTHUV AVO COMOENTRATIOH
• ZXNO
.100 4.3 /I
Fliherv Uthil Conantntton
uui tonccntrjtion
JAN FEB
APR
juu A«-O
oor NCV
ceo
-------
AMBIENT PROFILE
Graph Set 2
Figures AP-5 To AP-11
1 - Station # 12433000
2 - Station # 150114
3 - Station # 12419000
Spokane River blw Long Lake Dam RM 33,
Spokane River @ State! ine RM 101
Spokane River nr Post Falls RM 9!
Note: Stations 2&3 combined represent water entering Spokane River,
Graph Explanation
The two year running average technique used in this section
is a graphical representation of long term ambient data designed
to smooth out seasonal irregularities in the data. The technique
has no statistical significance; however, it does show long term
trends in the data.
Data from 1966 to 1974 was reduced to consecutive monthly
medians. Then the monthly medians for two years, January 1966 to
December 1967, were averaged and the point was plotted at December
1967. Next, the time plot was advanced 3 months and the monthly
medians for that corresponding two year period, April 1966 to
March 1968, were averaged and theft point was plotted at March 1968,
This process was continued at 3 month increments until December 19N
Total coliform values represent geometric means as dictated by
convention.
-------
3- r
*
FIGURE AP-5
uvrj) maim
1USB3-I
S
T
ft
r
u
o
u
7BBB+
1— W.1«-OJ3.J ft*tlo«»U4)>OOO
»— MLU-101.1 lUtia- 130114 an
>— MIJ^-OM.O •Utio>.-'U41»0(M
•.!.«. D.I. 34-54-01
70 "
YEAH
7Z
O
O
N
D
U
O
T
V
V
A
T
S
O
ri
i
o
n
o
ri
H
o
180+
140
120.
nrvni «unt
1—KLU-01).} fuUfl>cU411000 «.i.«.0.». 34-S4-01 MQ-M
J—MiU-101.1 it»tlan-U0114 tut 841031
>—MU-OM.O lt»Ua^U41*000
74.
-------
FIGURE AP-6
liBEEJ- -
e.
A
H
r
u
o
u
O
f
1—MK-OM.J Ititloo-lUJJOOO •.«.«.D.«. 24-S4-01 •»-«
»—Hll>-lal.l lUtloi 150114 utd 541021
:U41XXXI
3
7B 71 7Z 73
VCAR
X
9
a
o
u
v
t.
D
O
X
V
o
c
N
n
o
13
14-
13-4-
11- -
UVEX uin
1—*U1*-OJJ.J ft.tian-1303000 «.«.«.D.». 34-M-O1 HQ-r«
3—Kil*-I01.« Station-1J0114 and S4102I
0 lutira-U41»OOO
BT7
Idaho Standard
-------
36
FIGURE'AP-7
ncrua uvu mun
IU80. .
T
A
C
A
ft
r
u
o
u
o
r
I—«tl«-OJJ.l itttlon-13411000 •.§.«.O.«. M-M-U »Q-M
>~«U»-101.« lUUor 150114 «a4 54103*
)_«U«-«».0 tUtio*. 1241*000
79
VCAM
B.44B+
0.3S- -
0.90-
H
O
at 0.B9-
•4-
N
O 0.
0.13- •
trocua MTTOI win
V—•U**0*l.l'lt*tlM»U41X>00 V.I.
>—MUvlOl.* f UUao-154114 ad 541021 •
>—MU-OM.O lt«tllM-U41*000
«.DJI. 14-M-01
AUOAL BLOOM POTENTXAU
«7
n
73
74.
VKAM
-------
31
FIGURE AP-8
noun uvu tun
c,
A
n
r
t.
o
w
o
r
s
X—Mile-Oil.1 ftatloo-lJOJOOO •.*.*.D.B. 24-S4-O1
l.! ititlo. U01K «id S4103I
-i \-
*-z—» - I - I
70 71
VtAR
O
N
Z
A
0.ES9- -
0-L3- -
N
H
3
N |B. ID- -
s
L
0.03- -
1—«11*-011.1 lt*Uao»U411QOO . •.•.•.O.I. 24-S4-01
IUtlaa-150114 «nd M1021
7» 71
VCAR
I _ I-
-------
•38
FIGURE AP-9
•faun* irvta uun
1USB- •
T
It
C,
A
t.
o
w
1—«U*-0]).J Ititlon-lMlXMO •.•.•.O.I. J4-J4-OX «Q-rt
}—MU*-101.t luclo .130114 «n4 M1O3*
«.0 lt*tl—«ll«-101.t SUtlM-150114 ud VtlOU
.O «t*UM-U419OOO
-------
FIGURE AP-10
9
r
ft
t
o
u
o
r
o
1_MU»-OJ1.} lt«tlco-U4JJOOO W.I.«.D.«. 14-M-01 VQ-M
3 mij-ltH-t (CAtlA 130114 Md S410U
».0 •t*tlo>.'U41»000
07
70 71
VCAR
79.
0.0S-1-
D
I
O
R
T
M
O
H
O
9
O
L
r
0.ee- •
ICatioo-150114 *ad M102*
J4-S4-01
^^
ALOAL BLOOM roTENTIAU
7BP
-------
FIGURE AP-11
kr*u win
liaao- -
UEC339™ ™
A
M
r
u
o
w
^,
O
•r
7BBI9- •
1—NU»-On.) (tatlon-12411000 W.l.t.D.t. 14-S4-O1 «Q-rt
1—KU*-L01.I fUtla 150114 *nd MlOJt
1—M1U-OM.O IUtloo-U41>000
B7
7» 71
VCAK
7a
nvza BUDI
1—MLU-O33.1 lt«tlo»-U4)3aoo «.«.«.O.I. 24-M-O1 I
1—tU_U-101.i «t*tlan-U0114 «nd 541021
>—KLU-OM.O IUtiaa-U41«OOO
T
O
T
A
t.
O
O
t.
X
r
o
R
1
0
0
.H
L
74.
-------
AMBIENT PROFILE
Graph Set 3
Chlorophyl A At Long Lake Dam
Data obtained from R.A.Soltero
41
-------
c
H
L
O
R
O
P
H
Y
L
L
I
N
M
O
FI6URE AP-12
SPOKANE RIVER BASIN
SPOKANE RIVER / LONG
4 — 1974 MONTHLY AVERAGES
3 — 1973
2 — 1972 "
JTJN JU. ALQ SEP
MONTH
OCT
NOV
DED
to.
-------
SOURCE PROFILE
-------
SOURCE PROF ILE
This section of the profile provides a compilation of all
existing point source discharge data for the municipal and industrial
effluents in the Spokane River Basin. The sources listed repre-
sent the significant contributors in the basin. Effluent data
found in the tables originated in the Discharge Monitoring
Reports files, from population equivalent calculations, or other
filed reports. In addition to the actual loading figures, percent
relative loading contributions from municipal and industrial
discharges have been included.
TABLE SP-1
POINT SOURCE BASIN SUMMIT TABLE
CCCUI O'ALEM BASIN
Mwlclpfl
Imlintrlfl
TOTAL
CCCI* O'ALJEHC LAIC
Mw>lcl»*l
llMMtrld
TOTAL
SFOUM BASIN
HMilclf»l
In4ulf - Pk, C4, Hg, ft. In
-------
SPMMCKnMIMm TABLE SP-2
»~~.
COELH D'AUkC IASIN
Seut* Fork CMW «'Al«n«
PliMDunt
SMlt^lll.
K.UCW
Itorttnw
EllzMwt* P«rk
Elk Crack
Ortum
Sllwrton
•oodltnd P»rk
Millv
St. Jon Rlw
St.. «*•!•§
.A..TT
St. H.rl«
£•!<»
S-t.
OKUR O'AUNE LAKE BASIk
• Conir tf'Alin* L*k«
PI— .r
torln
HOT-)..
Itodlal L»k»
EMt»m Strt» Hoiplt.l
L«k*l«nd VII l»g«
Hxllcal L*k«
Spirit Uk*
SPOMNE RIVER BASIN
Hilit Stvi Spokvw Rlnr
0*1 1 f«rr»c«
SpOkWM
vnd.l.
• lll«o-Atvi.
LlttU Spok«>« Rlv«r
ColD^-f
C»»- P«rk
Nortt».«t T«r»c»
Htnoaan Cr*«k
C*~y
Sp*9l.
Rock to rd
filrf I.IO
T*ko>
T"~"
SIVCT
5.0
5.0
3.0
3.5
9.2
14.0
17.0
19.1
23.7
13
65.3
24.3*
27.5
130.4
130.4
131.3
14. i
67
SO
S3
W
100.7
103
IIO.B
1 . 1
15.0
19.2
20.2
33.0
M.6
43
Iw • Mjnlclp*! $ Contrlbi/t Ion
IB • B*»ln J Cofitrlbut on
not
.29
.3
.018
.016
.03
.03'
.18
.73
.03<
20.4
.01
.6
1.33
.15
.9
.033
.3
.095
T-moi t t
l*/d H B
16.4
8.1
48 2.1 1.4
4.8
2.4
.9
16.3
3.8
3.6
IU.8 6.0 4.1
20.4
2-
1.3
1.3
4. 1
2.0
.3
9.8
9.0
14.2
7
.6
IMI T2 «•.«
.7
4.4
29.4
It
«.7
9t 4.3 2.9
1.0
10.6
4.6
66.4 3 2
4.1
2.8
3.9
7.7
1.4
" 1 *
247 1.27 1.0
IS.t
1000 3.15 3.4
100
3.7
ie.8
340 1.6 1.2
80
76
230 1.3 1.0
40
42
2.9
2.6
1.0
4.0
10
27.2
17.6
348 i.l 1.2
IJ4
I.Z
ISfIS « ft.*
i.a
H
4J
»7 X. 1.4
1*0
152
1..
20.8
».i
134.4
8.0
3.6
80
31.2
Ml « «
43.5
20.9
123.3 3.8 I.S
12.3
6.7
2.3
42
9.»
9.4
33.5
32.4
3.2
S.0
3.4
10.3
3.3
1.2 •
29.6
23
36.3
17
1.4
4623 «0 47.Z
i.T
0-3
52
4»
I7.J
252 ..3 3.7
2 i
27.2
11.7
176 3 2.6
10.3
7.3
10. 1
19.9
3.7
too t ,
Ik/d H 1
210 I.JJ ,
13.9
850 },! ,
85
x.e
18
J89 1.5 ,
68
63
245 l.t !
33
33.7
2.5
2.2
7
3.5
t.3
IS.S
».4 - •
J5
117
I.I
I3JJM «
i. i
17
»
S3» 1
lit
97
1.4
31.2
7.8
200 U
7 •
4.9
6.7
IJ.3
23.3
-------
TABLE SP-3
" " SrW*«f HIKER BASIK
OISOVU<6£R
faflQR D'ALSNff B4SIN
5F Co •
.- -
-
27 - -
14 -
18.2
28.3
. . .
300* 3.0 1.0
324 3.2 I.I
»6 -
C930 87.7 30.5
-
13.8
•03 i I
Ifc/d 1 B
.
.
.
....
.' .
-
-
-
-
-
- -
22 2.0 .4
.2 -
.2 -
1070 97 15. C
6.3
3.6 • -
aoo (l
ib/d' i e
•
-
.
.
-
.
-
.
-
-
- _ .
.
M I.I .4
1568 30.3 7.3
3500 60 It.:
24 - '
i.2
CHM- %
Ib/d 1
106 2.9
2
2.5
1.0
1400 38.3
182 3.0
-
1800 49.3
130 4.1
-
1.4
6.4
3.3
34M 95.4
-
-
-
-
-
• . CcM>lr«<] Heevr Hoteli - ft, CO, Mj, Se, In •
. >-N«gllglele
« . Plus (tore Fro. Unreoorte4 Discharges
-------
CRUSE-EFFECT RNflLVSIS
-------
46
INTRODUCTION
CAUSE AND EFFECT RELATIONSHIPS
Water pollution problems occur throughout the basin due to mun-
icipal, industrial, and agricultural wastes. These problems include
toxic metals, algal blooms, dissolved oxygen depressions, bacterial
contamination, and turbidity.
Coeur d'Alene :The heavy metals and phosphorus loadings that
Sub-basin originate on the South Fork Coeur d'Alene River
appear to be the major constituents causing
water quality degradation in the basin. It seems
groundwater leaching of old tailings deposits
and tailing pond leakages contribute significantly
to loadings of heavy metals in the basin.
Coeur d'Alene Lake:The nutrient requirements necessary for a high
Sub-basin eutrophic condition in Coeur d'Alene Lake are
present. However, heavy metals toxicity appears
to suppress the algal bloom growth in some areas
of the lake.
Spokane River :It was found that toxic levels of zinc occur in
Sub-basin the Spokane River as a result of high zinc con-
centrations in Coeur d'Alene Lake. Excessive total
coliform concentrations were found to occur period-
ically due to the city of Spokane discharging untreated
sewage through storm overflows and discharging
inadequately disinfected primary treated effluent.
Low dissolved oxygen concentrations were found at
various times in some reaches of the Spokane River
and particularly in Long Lake ( and Downstream )
during the summer monthes. Phosphorus concentrations
from the Spokane STP and industrial wastes above
State!ine, in conjunction with nitrate concentrations
from groundwater inflow, are believed to be the
major causes of excessive algal growths in Long Lake.
-------
CAUSE AND EFFECT RELATIONSHIPS
Coeur d'Alene River Sub-basin
Graph Set 1 - July 1974 EPA Survey South Fork Coeur d'Alene River
Figure CE-1 to CE-13
- Bunker Hill Study
Figure CE-14 to CE-16
Coeur d'Alene Lake Sub-basin
Graph Set 2 - Coeur d'Alene River At Rose Lake
Figure CE-17 to CE-23
Graph Set 3 - St.Joe River At St.Maries
Figure CE-24 to CE-30
Graph Set 4 - Spokane River At Post Falls
Figure CE-31 to CE-37
Graph Set 5 - Coeur d'Alene Lake Mass Balance
Figure CE-38 to CE-43
Graph Set 6 - Coeur d'Alene Lake
Figure CE-44 to CE-93
Spokane River Sub-basin
Graph Set 7 - Spokane River river-mile trends
Figure CE-94 to CE-107
Graph Set 8 - Hangman Creek at Mouth at Sookane Profile
Figure CE-108 to CE-122
Graph Set 9 - Little Spokane River, Two Stations' Profiles
Figure CE-123 to CE-136
-------
48
FINDINGS & CONCLUSIONS
CAUSE & EFFECT RELATIONSHIPS
Coeur d'Alene River Sub-Basin Section
1. The problems in this sub-basin occur in the Southfork and
Mainstem Coeur d'Alene River. The Northfork Coeur d'Alene
River has very good water quality as it flows through the
Coeur d'Alene National Forest showing little degradation .
from man related activities.
2. The number one problem in Coeur d'Alene sub-basin is heavy
metals loadings. The high concentrations of Lead, Cadmium,
Arsenic, Mercury, Antimony and Zinc can be directly attributed
to the mining activities on the South Fork of the Coeur d1
Alene River. FIG CE4 to CE8, pages 5? to (^ show the
significant increases of these metals in the South Fork of
the Coeur d'Alene.
3. The Bunker Hill Company was determined to be the largest
contributor of heavy metals loadings in the entire Spokane
River Basin. ' They are directly responsible for high
levels of Zinc, Cadmium, Lead, and in addition, Iron, Fluoride,
and Phosphorous. FIG CE4, CE5, CE6, CE9, CE3, and CE10 show
major increases in these water quality parameters immediately
downstream of the Bunker Hill Company operations.
4. It was determined that the majority of heavy metals loadings
for Zinc and Cadmium originated from uncontrolled inflows
attributable to the Bunker Hill Company. These include
seepage inflows from the Bunker Hill CIA Pond to the South
Fork Coeur d'Alene River unpermitted discharges, violations
of permitted discharges, and unidentified inflows to Silver
King Creek.
Pages £8 to 5
-------
FINDINGS & CONCLUSIONS
CAUSE & EFFECT RELATIONSHIPS
Coeur d'Alene River Sub-Basin Section (cont)
7. Phosphorous levels exceed the level for potential algal
bloom below the Bunker Hill Company operations at
river mile 6 (FIG CE10 page 61). However it should
be noted that the Zinc levels in this same reach are
much greater than the listed algacidal level (see 5 above).
8. The waters of the South Fork of the Coeur d'Alene River
below Wallace and mainstem of the Coeur d'Alene River
below the confluence with the South Fork are acuteTy
toxic to Rainbow Trout. This acute toxicity is carried
into Coeur d'Alene Lake. The toxicity is believed to
be due to the high concentrations of heavy metals
throughout the study area which are far in excess of
literature values known to be toxic to Rainbow Trout. ^
FIG C-13 page fcf,
Coeur d'Alene Lake Sub-Basin Section
*Entering-Coeur d'Alene River
1. Phosphorous concentrations entering Coeur d'Alene Lake
(at Rose Lake) appeared to be directly proportional to
flow, indicating erosion of old deposited tailings was
the reason for these levels. Fid.ce.-22
2. Zinc levels entering Coeur d'Alene Lake (Rose Lake Station)
appeared to be inversely related to the magnitude of
flow, indicating that point sources, groundwater, or
tailing pond leakage were the main source. FI&.CE- as, PA&eea
*Entering-St. Joe .Riyer
3. There were no serious water quality problems in the
St. Joe River at the sample site tested. However,
there were two discharges downstream of the station
which enter the slack water reach of the St. Joe River
and these may contribute some nutrient loadings to
Coeur d'Alene Lake. R^EKVKE. TAW*. SP-2.
*Leaving Spokane River
4. The Post Falls water quality station is important in that
it functions as an interstate station between Idaho and
Washington , and reflects the water quality of Coeur d'Alene
Lake as well .
Environmental Protection Agency, Region X, Seattle, Wash.,
Ronald Kreizenbeck, "Livebox Study 197411
-------
FINDINGS & CONCLUSIONS 50
CAUSE & EFFECT RELATIONSHIPS
Coeur d'Alene Lake Sub-Basin Section (cont)
*Leaving Spokane River (cont)
5. Total Phosphorous concentrations leaving Coeur d'Alene
Lake (Post Falls Station) exceeded the 0.05 mg/1
concentration considered minimum for algal blooms
from February through April of 1974. FIG^CE-SO* p^e. °(~i
6. Zinc concentrations in the Spokane River below Coeur d'Alene
Lake (Post Falls) exceeded toxic levels for a salmonoid
fishery (300 ug/1) for nearly half of 1974. All
concentrations exceeded the Algacidal level (80 ug/1)
throughout 1974. ne». ce-37 PA&E °\6
*Lake Proper
7. During 1974 Coeur d'Alene Lake functioned as a sink for
Phosphorous, Zinc, Lead, and Cadmium and as source for
nitrogen.
8. Detention time for inflowing waters from the Coeur d'Alene
River and the St. Joe River has been calculated to
fall within the range of 40 to 120 days.
Spokane River Sub-Basin SubSection (Based on Data From 10/72-9/73)
Mains tern
1. Two tributaries, a major point source, and groundwater
inflow have significant impacts on the already polluted
waters of the Spokane River. Specifically, these sources
include the Little Spokane River, (river mile $(>-s )
Hangman Creek (river mile T-** ), the Spokane STP
(river mile 67.2- ), and the groundwater inflows in the
Spokane area (river mile 70 to 90).
2. Turbidity concentrations experienced a significant in-
crease at river mile 70 as a result of Hangman Creek
during high flow. The turbidity decreased as it settled
out in Long Lake between river miles 33 to 55.
FIG CE98 page IS5.
3. Dissolved Oxygen concentrations violated Washington
Water Quality Class A standards below Long Lake during
the low flow period (FIG CE100 page 187) due to
eutrophic conditions in the Lake and algal activity.
It is unclear whether these violations are the result of
man-made or natural causes. Possible W.Q. standard
reel arifi cation of their segment may be necessary.
-------
FINDINGS & CONCLUSIONS ^
CAUSE & EFFECT RELATIONSHIPS
Mainstem (cont)
4. Total Phosphorous and Dissolved Ortho-Phosphorous
levels exceeded the potential algal bloom concentration
downstream of the Spokane STP during both high and _
low flow periods. It appears that the Spokane STP is
the major source of Phosphorous in the Spokane River.
In addition, Hangman Creek is a significant source OT
total Phosphorous during the high flow runoff.
FIG CE101,CC102, pages IS^ISS.
5. Nitrate (N02+N03) concentrations exceed the potential
level for algal blooms (.3 mg/1 ) below Hangman Creek
during high flow periods (Dec.-Feb) due to non-point
source loadings from runoff. During low flow periods,
(July thru Sept) Nitrate concentrations exceed the
potential level for algal blooms from the area above
Spokane downstream through Long Lake due to groundwater
inflows from river miles 70 to 90 in the Spokane area.
During the Dec. to Feb. high flow period, the effects of
these groundwater inflows are minimized.
FIG CE103 page
6. Ammonia and Kjeldahl Nitrogen levels significantly
increase below the Spokane STP (river mile ^.t- )
during both the high and low flow periods.
FIG CE104, C-105 page Wj '^ .
7. High Zinc concentrations from the upper reaches of the
Spokane River were diluted by groundwater inflows
between river miles 70 to 90 and the Little Spokane River
at mile 55 to such an extent that by the time they
reach Long Lake they were below the general salmonoid
fishery toxic level during both high and low flow
periods and below the algacidal level during low flow
(July to Sept).
FIG CE97 page /»V
8. Total Coliform counts exceeded Washington Class A Water
Quality Standards as they entered Washington at river
mile 98 and continued to exceed standard levels down-
stream to Long Lake, approximately river mile 40 during
both high and low flow periods. The waters leaving
Long Lake were within standard levels (river mile 33).
FIG CE107 page
-------
FINDINGS & CONCLUSIONS 50
CAUSE & EFFECT RELATIONSHIPS
Hangman Creek
1. Hangman Creek enters the Spokane River at river mile
74.2*predominately influenced by seasonal runoff.
2. Highly variable flow is an important characteristic
of the stream as it ranges from 2 to 400 cfs and
greatly influences water quality .
FIG CE-109 page A?7.
3. Turbidity is directly related to flow, ranging from
levels near 1000 JTU during high flow (Dec-Mar).
FIG CE^ll page
4. Non-point source runoff from agricultural lands resulted
in high concentrations of Nitrate, Ammonia, Phosphorous,
and bacteria during high flow (Dec-Mar).
FIG CE117,to CE-121 , pages 205 to
Nitrate concentrations exceeded the potential level for
algal blooms (.3 mg/1) the entire year while Phosphorous
and Dissolved Ortho-Phosphorous concentrations exceeded
it during moderate to high flow periods only (Dec-June).
FIG CEll7,Cen9,CEl20, pages
6. pH values exceeded the Washington Class A Standard of
8.5 during the period of October and April through July.
FIG CE114, page
The measured Dissolved Oxygen concentration met the
Washington Class A Water Quality Standard the entire year.
However, it is suspected that depressions may occur
diurnally due to algal activity.
FIG CE-113, page
Little Spokane River
1. The Little Spokane River enters 'the Spokane River at
river mile 56.3 and in contrast with Hangman Creek it
is predominately influenced by groundwater inflow.
2. Between the mouth of the Little Spokane River and the
city of Wandermere flow measurements indicate 200 to
250 cfs of groundwater inflow are present.
FIG CE123, page 2(2..
-------
FINDINGS & CONCLUSIONS 53
CAUSE & EFFECT RELATIONSHIPS
Little Spokane River (cont)
3. Nitrate concentrations exceeded algal bloom potential
level the entire year and the major source appears to
be groundwater inflow.
FIG CE130, page -2/9.
4. Ammonia Nitrogen concentrations exceeded the .2 mg/1 .
level indicating organic pollution during high flow
in Feb-Mar.
FIG CE131, page ZZo.
5. Total Phosphorous concentrations exceeded algal bloom
potential level during the high flow periods (Dec-
March). Dissolved Ortho-Phosphorous levels exceeded
it for most of the year. Phosphorous levels are
directly related to river flow indicating the contribution
to be of non-point source origin.
FIG CE133, page 2ZZ,
6. The measured Dissolved Oxygen concentration met the
Washington Class A Water Quality Standard the entire
year. However, it is suspected that depressions may
occur diurnally due to algal activity.
FIG CE129, page Z/L
7. Bacteria levels exceeded the Washington Class A Standard
throughout most of the year with the highest levels
occuring during the high flow period of December through
March indicating contributions from non-point source
origins.
FIG CE135, page
-------
54
GRAPH SET 1
Coeur d'Alene River Sub-basin
This first set of graphs presents the data collected during the July 1974
EPA survey on the South Fork Coeur d'Alene River. Below the graphs are
the significant inflows located appropriately along the river mile axis.
The consistency of the trends throughout the range of parameters included
indicates the Bunker Hill Company is the major contributor of heavy metals
loadings and the South Fork as being a definite water quality problem area.
N E R
-------
FIGURE CE-1
WATER QUALITY PROFILE QRA^M
JULY 1S74- E"PA SURVEY
703—-
9
T
R
E
A
M
r
L
o
u
z
N
C
F
IPPi
B Q 12 13 18 21 24-
90U.HMF.gRK, COEUR D ALENE RIVER
x
41
C
ti
O
a
a
a!
b t.
•I V
>• M
V
V
SI
U U)
o O
a
2
o
C
g
CO
VJ
5|
I
I
•
u
d
-------
FIGURE CE-J;
56
WATER QUALITY PROFILE GRAPH
JULY 1374. EPA SURVEY
C
O
N
D
U
C
T
1
V
I
T
r
All data points are an
average of from It to 6
Eamplea taken during a
3 day sampling period.
-e-
5 a 12 .13 IS 21. 24-
SOUTHFORK COUER D ALENE RIVE.R
32J
< r
U
jj
II
C
4
W
1 1
1 1
x 1
C 1
6 '
X
to u
C V
to tl
V U
> M
•"• S
T4- 3
to m
II
f
I
9
a
c
*-i
•
§•-1
V
(Q X
t>
tl
i
ii
C
2
0
C
.H
a
§
(O
V
tl
1C U
-------
FIGURE CE-3
WATER QUALITY PROFILE GRAPH
JULY 1374. EPA SURVEY
0.Q3-
F
L
O
U
R
I
D
E
M
G
0.50-t-
0-32)4-
0.20-4-
2M25-4-
AL1 data, points a« jj
average of from 1) to (
camples taken duringi
3 day BBBpling perioi
B 8 12 15 18 21 24-
SOUTHFORK COUER D ALENE RIVER
27
1
tl
ti
•s
5
V
a
n
p
A
ii
o
to
to
II
« «
-J5
t>
c
c
•r4
^3
n
s
10
a s
•J 1C
1C 0
4>
o
-------
FIGURE CE-4
58
WATER QUALITY PROFILE GRAPH
JULY 1374. EPA SURVEY
T
O
T
A
L
2
X
N
C
u
G
32X20- -
\sxscs~ -
AU. data points arc an
average of from it to 6
camples taken during a
3 day snnpli&g period.
300 ug/1 Toxiclty to Salmonoid Trout \^
'Level
•HU ue/1 Algalcldal Level Q
I—r^ i in 1—r-'
B 8 12 IS 18
SOUTHFORK, COUER D ALENE RIVER
32J
'2
5
ci
s
(O «
•8
to
•*
A
M w
« OK.
I 5l
•J S5 O
5
(W
4; A
13
flQr &4
A
W
-------
T
O
T
A
L
C
A
D
I
U
M
u
FIGURE CE-5
WATER QUALITY PROFILE GRAPH
. JULY 1974. EPA SURVEY
20
data, pointj
average of Trcm 1|
camples token
.3
f \ 30 ug/1 Generally Toxic to Aquatic-Life
__ __ __ _•*>— — — — — «— — — — —-'— — — •—• ~—• ~~ ~~ ••• ™~ ~~ ~- — «
? JJS^l^Toxi.c. to _Salm°IL0i^ ^Eggs m_m \
+
•\
B a le 13 18 21
SOUTMFORK COUER D ALENE RIVE.R
_
27
X
v
Jd
M
X3
V
5
(X,
> M
3. 9
to «
ta
to
^1 W
t> O
I
s
1 Si
1
0
«
U
-------
FIGURE CE-6
60
WATER QUALITY PROFILE. GRAPH
JULV 1974. F-PA SURVEY
2S0-T-
T
o
T
A
L
L
E.
A
D
U
G
133- -
UZJ2J- -
33- -
•AH data points are an
average of from 1» to 6
cample3 taken during a
3 day sampling period.
1 1 ! 1 1 1
1 J
1 4
B a 12 is
SOUTHFORK COUER D
IS 21 24-
ALENE. RIVER
27
3ZJ
* ,
»-JJ
i V
V
a
«
tl
O 4)
V
a
o
U «
xi
«>
B
*> Q
9 3
I £
V
a
ta
3
CO
t>
o
4
I
-------
FIGURE CE-7
T
o
T
A
L
A
R
S
E
N
1
C
U
B
WATER QUALITY PROFILE
JTJLY 1S74- EFA SURVEY
All data points are an
average of traa 1* to 6
camples token during »
3 day sampling period.
e a L2 is 1.8 ex 24.
SOUTWFORK COUER D ALENE RIVER
27
i
i
M
41
(X,
c
A
a
~4
a,
W2
B V
Ki t,
Ci t>
> X
^ B
-< 3
M A
ti U
v o
t>
ti
to
X
t)
5 I
fcl CJ
-------
T
O
T
A
L
A
N
T
I
M
O
N
Y
u
G
FIGURE CE-8
WATER QUALITY PROFILE GRAPH
JULY 1974- EPA SURVEY
62
All AatB. points are e
overage of tram 1) to
ecjuples tBi.en during
3 day seaipliag.pericxJ
SOUTHFORK COUER D ALENE RIVER
M ' ' '
•a
Cl
tl
a
M
13
A K
o
a
•a 59
>-3 to o
-------
FIGURE CE-9
WATER QUALITY PROFILE:
• i
JULY IS74- EPA SURVEY
1602J-r
AX1 data point I are y
average or traa li to £
camples taken during
3 dajr sampling period,
18
24-
27
j,
SOUTHFORK COUER D ALENE RIVER
4>
a
XI
u
o
CO «
, 3
V O
•3 s
3 «i
CQ M
X
41
41
(t!
41
a
•s
£
_ o
i 31
•3 *q CJ
IV
o
D
«t
-------
FIGURE CE-10'
64
T
O
T
A
L
P
H
O
s
P
M
D
R
D
J
5
M-
I
WATER QUALITY PROFILE GRAPH
JULY 1374- EPA SURVEY '
0.12
0.10
All data points ore on
average of from 1» to 6
camples taken during *
3 day sampling period.
0.0S--
0.J33-+-
-04
0.02—
ALGAL BLOOn POTENTIAL LEVEL
1 1 1 L 1
1 1 1 1 1 1 1 r 1 1
3 B S 12 13 18 21 24. 27 S
SOUTHFORK
1'
M C «•
S ' 26 1
COUER D /
< \
i 1
* i
^LENE RIVER
! !
1
u 1
i 11
t>
a
o
ts o
3
V
a
p.
4>
a
o
>*4
A
a
9
(O
-------
FIGURE CE-11
WATER QUALITY PROFILE
JULY 1374- EPA SURVEY
0.12-r
JUJL data pointi are an
average of from It to 6
samples taken during i
3 day sampling period.
N
O
2
N
O
3
0.02 4-
e e 12 is IB 21 24-
SOUTHFORK COUER D ALENE RIVER
27
rM
r tl
t)
f,
G
V
a
-H
ft,
1
i
*>
<9
C
3
A
(I
fl
il
" i
E
ti '
X
S"S
26 -JJ
o
** ^ >i
u ti • O
> M
•~" G .10
•H 9 -rt
w ea «
1 i
a
•H j-(
H 2
*4
W 0
M O
l< CO -H
t) O J3
^ a i
' II
x
S '
6«
•a « s
v t-i G
f. .
6 2 a
0
t> t> >,
•5 c |
% ^r *O
•J » 0
^
o
n
^1
«
-------
A
n
M
o
N
I
A
N
H
3
FIGURE CE-12
UATER QUALITY PROFILE GRAPH
JULY IQ74. EPA SURVEY
66
0.10 H-
0.03+
0.0B-4-
0.04—1-
•AH data, points are on
average of fron li to £
camples taken during a
3 day sampling period.
4
e a 12 . is
SOUTHFORK COUER D ALENE RIVER
c o
i!
M
t>
o
z
!
4>
^•a w
^< • 3 ^H
ca m A
1
H
H
•H
tl
a
ri
X
•8
w
3
u
o
to o
3
p.
a
O
I
V
u
a
-------
RAINBOW TROUT 72 HOUR
PERCENT SURVIVAL
LK. COEUR D'ALENE
SUNSHINE
MINE:
S.R COEUR D'ALENE
GALENA
MINE
LUCKY FRIDAY
MINE
EPA Livebox Study Graph
FIGURE CE-13
-------
68
LEAKAGES AND OTHER INFLOWS TO THE SOUTH FORK COEUR D'ALENE RIVER
IN THE BUNKER HILL AREA
In the last three years, several EPA-Idaho water quality surveys
have identified two uncontrolled areas of major heavy metals pollution
in the South Fork Coeur d'Alene River near the mining operations of the
Bunker Hill Company (river Mile 4.9 to 6.9). The first is a severe
IHBBHHHIi pollution problem attributable to leakage or seepage
inflows from the Bunker Hill CIA Pond and Slag Pile. The second is the
occurence of unidentified inflows, unpermitted discharges, and
violations of permitted discharges to Silver King Creek, a tributary
of the South Fork Coeur d'Alene River.
The relative loadings and percent contributions for all sources
of zinc, cadmium, and lead are summarized in Table CE-14, page 6%
for the South Fork Coeur d'Alene River (based on the October 1974
EPA survey). It is evident from the data that the major loading
contributions of zinc and cadmium come from presently uncontrolled
sources in the area of the Bunker Hill Company. These sources
account for 66% of the zinc (3250 #/D) and 74% of the cadmium (34 #/D)
for the entire South Fork basin. Seepage inflows entering the South
Fork Coeur d'Alene River from the Bunker Hill CIA Pond account for
approximately 28% of the zinc (1350 #/D) and 7% of the cadmium (3 #/D).
The location and effect of the seepage inflows for conductivity
(associated with heavy metals)and zinc are graphically depicted on
Figures CE-15 and CE-16, pages TO and 7/ .(based on a March 1975
EPA survey).
-------
FfGURE CE-14
LOADINGS AND PERCENT CONTRIBUTIONS
SOUTHPORK COEUR D'ALENE RIVER
OCTOBER 1974 EPA SURVEY
SOURCE TOTAL ZINC TOTAL CADMIUM TOTAL LEAD
0/Day I 0/Day % #/Day _^
All other sources
including headwaters
and other industries 1590 32% 10 22% 80 fi]|
Bunker Hill CIA
Main Effluent 60 1% 2 4% 5 tj
Seepage Inflows from
the Bunker Hill CIA
Pond and Slag pile 1350 28% 3 7% 15 13!
SILVER KING CREEK
Bunker Hill 0004 Eff.
(in permit violation) 300 6% 19 41% 4 31
Bunker Hill Zinc Pit.
Creek 800 16% 10 22% 3 II
Unidentified inflows
to Silver King Creek 800 16% 2 4% 13 111
TOTAL BASIN LOADING 4900 100% 46 100% 120
-------
FIGURE CE-15
BUNKER HILL CIA POND SEEPAGE INFLOWS
SOUTHFORK COEUR D ALENE RIVER
MARCH 1975 EPA SURVEY
CONDUCTIVITY IN UHHO/CH
70
TREATMENT
FACILITIES
g! IBB
O
N
D
U
C
T
Z
V
I
T
V
I
N
U
M
H
O
X
C
M
iaej-
1Q3-
v» •» ««
J 1 1
g
M Vft
J 1
SOUTH IMC (CIA POND SIDE)
AVERAGE ACROSS UYOt
NORTH BMK
RORTK
1
EAST no
MU UASTE K»D
Yi'
I a n
\\ I 1
;
: WEST
• PKOS »LAHT
no 3<>xx^>-^ ^v
RESEOVOIR |?SIL«J^^\ \
§"A"/<,.|V5^/^J
m»L£ SEEPAGE AREAS
1
K
r ' i n
g
tf
-
^
M
M
2
I
^ 50UTHFORK CDfUR 0 H.tlil RIVfR .1^
I 1 I I I I I I I
B.B B.B Q.4- 8.2 8.0 3.8 3.8
RIVER MtUE
3-2
KH IKOCASC I
TO SECTACE INFIX
3.0
-------
FIGURE CE-16
BUNKER HILL CIA POND SEEPAGE INFLOWS
SOUTHFORK COEUR „ ALENE RIVER
MARCH 1975 EPA SURVEY
TOTAL ZINC IN UG/L
11
CIA
uses
HAIR UASTt POND :
11 TISIBU SE£
n n M
' • - * ' t^rrbtnau I-A
• rnos PLANT CESEPVOIR :
JASE AREAS
" r
i^tio A li fLr oft,ro *
I >Jr's"-'-»->xi Y«
L.SLW PILE^\ \
fc#S3$
'J *J «{
(
w
s
oc
y
5
z
i
N
C
I
N
U
a
•4-02X2) -
C C
*-
SOUTH ewi It'1"
AVERWE »0«»! "'
e.a e.e e.-«- e.a B.CJ s.a a.s
RIVER MIL.E
3.^.
-------
72
COEUR D'ALENE LAKE SUB-BASIN SECTION
-------
COEUR D 'ALENE LAKE SUB-BASIN-
(TABLE OF CONTENTS)
- OVERVIEW
- GRAPH SET NO. 2
COEUR D 'ALENE RIVER AT ROSE LAKE (Time Plots)
Parameters; Flow, Temperature, Conductivity, Dissolved Oxygen,
Total Nitrogen, Total Phosphorus, Total Zinc
- GRAPH SET NO. 3
ST. JOE RIVER AT ST. MARIES (Time Plots)
Parameters; Same as Graph set No. 2
- GRAPH SET NO. 4
SPOKANE RIVER AT POST FALLS (Time Plots)
Parameters; Same as graph set No. 2
- GRAPH SET NO. 5
COEUR D 'ALENE LAKE MASS BALANCE (Time Plots)
Parameters; Total Nitrogen, Total Phosphorus, Total Cadmium, Total
Lead, Total Zinc
- GRAPH SET NO. 6
COEUR D 'ALENE LAKE
I. Introduction
II. Discussion
III. Data Presentation
A. Vertical Profiles and Time Plots
Parameters; Temperature, Dissolved Oxygen, pH, Conductivity
and metals, Total Phosphorus, Chlorophyll a_, Secchi disc,
Total Zinc
- Station 153384
153386
153391
153395
153397
B. Substandard Water Quality Conditions
C: Lake Mile Plots
- Temperature
- Dissolved Oxygen
- pH
- Conductivity
D. Sediment Data
E. Detention Time Calculations
-------
74
COEUR D1 ALENE LAKE SUB-BASIN OVERVIEW
Graph sets 2,3, and 4 show the water quality conditions for the
Coeur d'Alene River at Rose Lake, the St. Joe River at St. Maries,
and the Spokane River at Post Falls respectively.
In one sense they are supporting data for the following series of
graphs concerning Coeur d'Alene Lake: the mass balance graphs (Set
No.5) and the vertical profiles, time plots, and lake mile graphs
(Set No.6). In addition, they allow the reader to analyze individual
seasonal variations, problem areas, and the general status of each of
their locations, as they best represent their net effect on the entire
basin.
The location of river stations defined in graph set 2, 3, and 4
are shown on the map in Figure C-17.
-------
WASHINGTON
RwerPOST
STATION
KOOJENAI_
BEN'EWAH"
20
FIGURE CE-17
-------
76
GRAPH SET NO. 2
COEUR D'ALENE RIVER AT ROSE LAKE
-------
FIGURE CE-18
U909 DATA
RO3C
MONTHLY AVERAGE. FLOW
r
T_
o
u
c
F
S
= FLOOD
JAN
FEB
APR
H 1 }-
1 1
JUN JUL >>LQ SEP OCT NOV EEC
MONTHS 1Q74-
ROSE LAKE-U303 DATA
MONTHLV AVQ TEMPERATURE
T
E
n
T
•f.
R
A
T
U
R
E
O
E
N
T
12.0- -
B.fP- -
APR rv^v JT_N JUL AUQ
OCT
NOV ceo
-------
FIGURE CE-19
RO3C LAKK> U303 DATA
MONTHLY AVERAGE. FLOW
o
u
o
F
9
IQZh -
FLOOD
-e-
JAM
FEB
1 1 1
APR
•\—I—f-
JUN JUL AUO SEP OCf NOV DEC
nOHTHS 1874.
o
o
N
D
U
O
T
Z
•v
z
T
V
ri
z
o
R
O
M
H
O
9
X
L
180.0- -
140.0- -
120/0
102.0. .
60.0- -
ea.0- -
40.0- -
20.0- -
«O3C LAKC-U3Q3 DATA
MOHTMLV AVO CONCENTRATION
CONDUCTXVITV -;
JAN FBB
t 1 1
APR mv JVJN JVJL
1 1
SEP OCT NOV DGO
-------
FIGURE CE-20
ROSE LAKE- usoa DATA
MONTHLY AVERAGE. FLOW
•u
o
w
c
F
9
~ ROOD
JAM FEB n*R APR
1 1 1 1 1—-I 1 1
JLN ju_ .AUO SEP ocr NCV EEC
MONTHS 1874.
13-o-r
x>
I
s
3
O
u
v
e.
v
X
V
0
c.
N
M
O
S.0- -
e.0-
•3.0- -
«OSC UAK.E-U303 DATA
nONTMUV AVO CONCENTRATION
DISSOLVED OXYQEN
3TP
APR
JXJU AUO DQ»
DEO
-------
FIGURE CE-21
ROSE LAKE.. U303 DATA
MONTHLY AVERAGE, FLOW
F
•L
O
W
c
F
9
S FLOOD
-e-
JAM
H 1
FEB rVSR AT=R rV\Y JUN JUL ALB SET1 OCT NCV DEC
nONTMS
1S74-
RO3C LAKE.-U303 DATA
MONTHLY AVQ CONCENTRATION
TOTAL NITROGEN
T
O
•T
A
L
N
Z
T
ft
O
O
c
N
JAN FEH
NCV
rrn
-------
FIGURE CE-22
ROSE, LAK.E- uses DATA
HONTHLY AVERAGE: FLOW
o
u
o
F
10207:-
| pen- .
aooo
FEH
APR mv JUN ju. AUO
1Q74.
1 1
cec
R09E. LAKE-U3Q3 DATA
MONTMl-V AVO CONCENTRATION
TOTAU T»HO3PHOROU9
T
O
T
A
L
T»
M
O
H
O
R
O
U
3
M
O
0.12
0.04-- -
FED rvsH
rv\v JVJN ouu AUO 3EP cxrr NCV
-------
FIGURE CE-23
nose I_AKE.» uses DATA
MONTHLY AVCHAOC FLOW
j- ^ n.000
r
•u
o
u
o
F
S
JAM FEB
L ..!.. J
APR rvor JXN
L J_ J_ .1. J
SEP o=T rev cec
MONTHS
1874-
ftOSEL LAKC-U3Q3 DATA
MONTHLY AVQ CONCCNTBATION
ZXNO
.Z
z
N
c
u
o
-------
83
GRAPH SET NO. 3
ST. JOE RIVER AT ST. MARIES
-------
FIGURE CE-24
ST.JOE.3 AT 9T.ri*RX£S-U3QS DATA
MONTHLY AVERAGE FLOW
U020Z'": r
F
L
O
W
c
F
S
4-—\ 1 1 1 ! 1
JAN FEB MAR APR
JUN JUL AUQ SEP C3CT MOV
1—I
-------
FIGURE CE-25
T
E
M
P
E
R
A
T
U
R
E
C
E
N
T
ST.JOES R AT 9T.MARIE9-U9Q3 DATA
MONTHLY AVQ TEMPERATURE!
CO
FIGURE CE-Z«5
-------
FIGURE^CE-26
C
o
N
D
U
C
T
I
V
I
T
V
M
I
C
R
O
M
H
O
S
100-1-
S0--
S0--
70--
S0--
•40- -
33- -
20- -
10- -
ST.JOE.9 R AT ST . MARX ES-USO9 DATA
MONTHLY AVQ CONCENTRATION
CONDUCT IVITV
1—I—h
1 1 1 1 1
JAN FEB MAR APR MAY JUN JUL ALO SET* OCT
MONTHS 1874-
MOV DEC
CO
cr
-------
FIGURE CE-27
D
I
3
S
o
L
V
E
D
O
X
Y
G
E
N
M
Q
13-T-
3- -
ST. TOES R AT ST . MAR I ES-USQS DATA
MONTHLY AVQ CONCENTRATION
DISSOLVED OXYGEN
IDAHO WQ STD
CO
-------
FIGURE CE-28
T
O
T
A
L
N
I
T
R
O
Q
E,
N
1.3
/
L
0.1.0
ST.JOE3 R AT 3T.MARIE3-USQ3 DATA
MONTHLY AVQ CONCENTRATION
TOTAL NITROGEN
JAN FES MAR
APR HAY JUN JDL. ALQ
MONTHS 1O74-
SEP OCT
N!QV
cc
cc
-------
FIGURE CE-29
T
O
T
A
L
P
H
O
S
P
H
O
R
O
u
3
M
Q
0.03-r-
0.03-
0.EE- -
0.01--
9T.JOE3 R AT ST.MARTES-U3Q9 DATA
MONTHLY AVG CONCENTRATION
TOTAL PHOSPHOROUS
-------
FIGURE CE-30
ST.JOES R *T 3T.MARIES
MONTHLY AVERAGE CONCENTRATION
ZINC
Z
I
N
C
U
Q
JAN FEB MAR APR MAY JtJN JUL AUO SEP OC7T NOV DEC
MONTHS
ia-4-
co
o
-------
GRAPH SET NO. 4
'SPOKANE RIVER AT POST FALLS
-------
FIGURE CE-31
POST FALL^-USO3 DATA
MONTHLY AVERAGE FLOW
F
L
O
U
c
F
3
H 1 1 1 1—I—-I h
JAN FEB
APR MAY JUN JUU
MONTHS IQ74-
ALJQ
OCT MOV DEC
CO
to
-------
FIGURE CE-32 -
£0.02300--
T
E
13.02CS0-
C
E
N
T
S.02X213- -
FO3T FAUL3-U3Q9 DATA
MONTHLY AVERAGE: TEMPERATURE;
^ 1-
•\ \-
-------
O
N
D
U
°.
I
V
z
T
Y
n
z
c
R
O
M
H
O
3
FIGURE CE-33
F03T FALL3-U303 DATA
MDNTWUY AVG CONCENTRATION
CONDUCT!VITV
JAN FEQ HAR APR MAY JTJN JUL ALO SEP COT MOV DEC
MONTHS 1O74-
CO
-------
S3.£2303-
P
X
o
i_
v
E
D 12.13002:-
O
X
Y
G
8.02025-
N
M
FIGURE CE-34
FAUL3-U9O3 DATA
AVQ CONCENTRATION
DISSOLVED OXYGEN
-------
T
O
T
A
L.
N
I
T
R
O
O
El
N
M
O
0.13-r-
FI6URE CE-35
POST FALL9-US09 DATA
MONTHLY AVO CONCENTRATION
TOTAL NITROGEN
0.12- -
0.03- -
0.0S- -
0.03--
JAN FEB MAR
APR MAY JUN JUL AUO
MONTHS 1874.
SEP OCT NOV DEC
4O
-------
"FIGURE CE-36
0.10-T-
PO9T FAL.L.9-U9QS DATA
MONTHLY AVQ CONCENTRATION
TOTAL. PHOSPHOROUS
T
Q
T
A
L
P
H
O
3
P
H
O
R
O
U
s
n
Q
X
U
0.08--
0.0B--
~ . v Vis /:
Algal Bloco Potential Lerel
0.04---
0.02- -
MAR APR
JTJN OUL A«_» SE3P OCT I^JCA/
CO
-------
FIGURE CE-37
POST'RAH-S-U3Q3 DATA
MONTHLY AVO CONCENTRATION
ZINC
Salfflonoid Fisnbry Lethal Gone. • 300 ug/1
JAN
to
CO
-------
GRAPH SET NO. 5
COEUR D'ALENE LAKE MASS BALANCE
Figs. C-38 to C-42 graphically present mass balance calculations
for Coeur d'Alene Lake. This set of graphs indicates the lakes role as
a source or a sink for various parameters throughout the year. It
allows the reader to observe possible relationships between individual
parameters and flows.
Loadings for the major inflows, the Coeur d'Alene and St. Joe
Rivers, were compilated and defined as the lake inflow with Post Falls
loadings in the Spokane River representing the lake outflow loadings.
The net difference for each parameter was graphed for each month of
1974 on the upper half of each figure. The lower half of each figure
represents incoming and dishcarging flows for the lake.
Table C-43, at the end of Graph Set. No. 5, numerically summarizes
these mass balance calculations.
-------
FlmJRE CE-38
2.5 MM,
i
2.O.W.
•
1.5 HM-
1.0 MM
.. .5 Mft.
Ib/m a
-.5, MM.
-1.0 KM
30 000 ••
2k 000
18 000
cfa
12 000
6 000
0
mm Nirw«n *t*-m.
.. «•«• nat nhanga In loading _
botweon ; Roita Lk- .
, • .: : ' . Bt Jon and Poat Falla
Arr . . .•:.":••• :':i.t"":*.:r-. '
, .. _^ ..-,:=,te-,,-: ; ^
/\ • J M
.;..|.i .. ..'•
- i1 ' i . 1 • ' .!
; . '. ; i : ..|
! • ! : J
. . . . t • . - ' i
i i ; | 1
i ' i i i
. ! ;.' -,! ! "• ;
1
i
/"».-,^ • • . .- . --
/ x» • • i I
/ ,/ *\\ . • .
• £ ^r 1* •
' ,'' \\
L'' \\
4^^ v « *
f^l ' \\ avaraga monthly flow
f i \\ i97a |
/ / ' it . -«- Intolk • Rosa Laka a
i / / \. -: Bt. Joa
: / / \» •
.f / V; ' -"- out of Ik - Post Fall*
/ / vl ^ .
s. // \\
// \\
\ ^-^ // V
~-'/ \\
\ ^ \
v \V,X 1
W^i**-, —+,~~—.
*-<*'F~ffzr—~z;zzrx-i
CD
O
-------
t 000
200 000
150 000
100 000
50 000
Ib/m 0
-50 000
-100 COO
-150 000
FIGURE CE-39
TOTAL
. 1B74 ' !
•varaga monthly loading
»«• not nhanga In loading _- •
botwaan I Rosa Lk-11 . ;;
;~ . ! B6 Joo " and Post Fall*
iuimmiiUii.1
30 000
21) 000
18 000
cfs
12 000
6 000
/
X\
»
\
•varaga monthly flow
1B74
• ••• Into Ik • Roaa Lake GL
St.Joa
-'^ out of Ik • Post Fall*
-------
FIGURE CE-40
/JOO 000.
300 000
100 OOC
400 OOC
,700 OOC
>b/U r
-20Q QOC
-•too ooc
^or.-ioc.
30 000 .-
2l» 000
18 ooo
cfs
12 DOO
6 100
0
• ; •— • — avaraga monthly loadlnp
.. «"" ne* ohange In loading __
•» between i Roea Uk- .
1 . : ; • ; ' . 6t Jpa ' and Poac Fatla
.. . : .i-^H::!r.:^-::.-
; ! .=' : :•:;•: j
' ; ! ! j
"""••W.^ _..«•> jf*"**t^. ' ' 1
^~~*" X. S '"" ' . ! ""•—-
XX . ; , ;
., • • ' " ! ' • j
1 ' 1 ' : • -i
'' ::". -I" l':-1
• !! ' '! • :!
. : • 1 ; 1
r— — - ' ' j
. 1 A
••,••: i/ \
f*l \\ avarage montWy flow
. / / \\ «7a j
/' / ' v\ • •!• Into Ik- Roea Laka G. .
/ \\. 6e-Joe ."7!
./ •* ' Xv *r— ' out of Ik • Poae Pall» <
\ // - V -i
\"— */ • \ , !
\ ,.-' \\ !
\X :'
' — ''~*a'
-------
FIGURE CE-41
JTINC
. 500 0001
1 200 000-
900 000"
600 000
300 000-
Ib/ci n-
-300 000-
-6)0 000-
-910 000
30 000 ,,
2l» 000
18 000
eta
12 000
6 300
0
•"••• avaraga monthly loading .
I"* nat ohnnga In loading
. . betwoon Ro«» Lk- , ,
Et Joo «nd Poat Falls '
A,
/ \ /\
•]
i
f 1 "r
• 1 >
/X I
Js* \\ .
X^/ \l avaraga monthly flow
/ / Vl 1S7A
f • X-
// \| •••• Into Ik- Rosa Lok« a
/ \; St. Joe • —
A * \*
f f \\ **•** out of Ik • Poee Falls
V^-/ \ '
\ / v»
\ Vvx
-------
FIGURE CE-42
UAfl
=
.00 000-|
800 COO-
600 000.
;
400 000
1
I
2)00 000-
0
-200 000-
-400 000.
-600' 000-
«
Ib/m
i
30 000
2lt 000
16 000
cfa
12 000
6 000
Q
* * " ' *m~
*•!
% .
" * ' ' • " *
! • ; i
: *
i
i
^^*^*^-, Bm ^>^ \
V
\. /^^^^
' ^t Jf *
x^^ /
i • /^*X/
,
•
r— •-, '!
£'' \\
avarage jnonthly loading ! '
••!• not ohanga In loading _
. ' . ' between ! Roca Lk- !" .
. ' . St Joe and Post Falla
"•'. ••. |- ZTJ.IT:.: ; ::;:;•; rt; i..: :. • . .' .
\
• • t •
t '
,
•. . '. ' •
< , i • • «
; | '.. .
•";
1 !
r
i
....
• : •
*^^ \*
: f! • \\ «var«B« monthly flow ;
/ / it 1B7A
t \- "
/ / y| -•- Into Ik • Ro«a Laka G.
// W -
// \\
>v // \\
\ >i*-*w^ y/ \\
\ *' V\
• \ ••»,
^— ^rc^fl
v out of Ik . Pose Falla ;
— .-»
--^.'
' - ! ; '
t ,
wrss-crnrrr^-^w
-------
FIGURE CE-43
LAKE COEUR D 'ALENE MASS BALANCE SUMMARY * **
MONTH
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
TOTAL NITROGEN
(+) 160.000
(+) 1,500,000
(-) 100,000
(+) 50,000
(+) 570,000
(+) 100,000
(-) 300,000
(-) 50,000
(+) 20,000
(+) 50,000
(-) 70,000
(-) 100,000
TOTAL PHOSPHORUS
(+) 25,000
(+) 60.000
(+) 12,000
(+) 117,000
(-) 83,000
(-) 110,000
(-) 7,000
(-) 6,000 '
(+) 3,000
(+) 2,000
I-) 10,000
(-) 25,000
TOTAL CADMIUM
(+) 160,000
(+) 80,000
(-) 50,000 .
(+) 18.000
(-) 240,000
(+) 70,000
(-) 35,000
(-) 20,000
(+) 5,000
(+) 10,000
(-) 10,000
(-) 60,000
'TOTAL LEAD
(+) 130,000.
(-) 280,000
(-) 160,000
(*) 900,000
(+) 430,000
(-) 200,000
(-) 240,000
(-) 220,000
(-) 120,000
(-) 120,000
(+) 360,000
(-) 510,000
TOTAL ZINC
(*) 220,000
(*) 80,000
(+) 60,000
(+) 230,000
(-) 440,000
(-) 560,000
(-) 20,000
(-) 100,000
(+) 20,000
(+) 30,000'
(+) 30,000'
(-) 20,000
NET (+) 1,800,000 (-) 22,000
(-) 72,000
(-) 30,000 (-) 470,000
* (+) Indicates s&urce (-) Indicates sink
data In Ibs/month
-------
106
GRAPH SET NO. 6
COEUR D 'ALENE LAKE
-------
1C?
I. INTRODUCTION
Water Quality observations of Lake Coeur d 'Alene are presented in
the following graphs along two major lines of investigation;
(1) Examination of the water quality in relation to the State
of Idaho Water Quality Standards.
(2) The functioning and the effect on the lake as an intermediate
stage between the inflowing waters of the Coeur d 'Alene and St. Joe
Rivers, and the outflowing water which forms the Sookane River.
The majority of lake data-under evaluation is a result of monthly
»
sampling for the period 74/04/25 thru 75/01/16. In addition, an intensive
survey was conducted by EPA for the period 74/07/09 thru 74/07/11. It
was during this period only^ that'metals and nutrient data were collected
at depth.
A more extensive evaluation of Lake Coeur d 'Alene in the form of
a separate report is anticipated in the near future.
-------
103
II. DISCUSSION
-------
109
The vertical profile and lake mile plots indicate three different
stages occuring in the water column with respect to temperature
throughout most of the lake. These are; (1) July data depicts a
situation where formation of a thermocline is in progress, (2) September
data depicts a pronounced establishment of the thermocline, (3) and
January data depicts isothermal conditions prevailing.
The Coeur d'Alene and St. Joe Rivers seem to mix with the lake
at variable depths depending on the respective temperatures of the
input and lake waters. Detention time of the inflowing waters and
flushing period of the lake itself is heavily dependent upon these
variable stages of temperature distribution throughout the lake.
Dissolved oxygen concentrations show a response to temperature
variations in the lake. During the period when a thermocline is firmly
established the most significant decrease in dissolved oxygen with
depth occurs and is exhibited through vertical profile and lake mile plots.
The occurrence of this dissolved oxygen sag, in an area commonly
referred to as the hypolimnion, is a result of two factors. In addition
to being cut off from circulation with upper waters and not receiving
oxygen from the atmosphere during stratification, algal decomposition
at depth exerts a Biological Oxygen Demand on these waters.
Influence from algal decomposition at depth is also indicated
through substandard pH values exhibited at most depths. Specifically, the
74/09/30 pH lake mile plot shows substandard values for all stations
at the 66 foot level and, with the exception of station 153397, the
same is true at the 33 foot level.
Correlations between heavy metals and conductivity are apparent in
the July vertical profiles. During this period, a decrease in surface
-------
ion and heavy metals concentrations occurs concurrently with a 11 u
increase for the same at depth as the north end of the lake is app-
roached. This is indicative of an increased rate of heavy metals
settling out as the Coeur d'Alene River's waters travels north.
According to detention time calculations, input waters residing
in the lake during July would have entered during high flow conditions
with the majority of heavy metal loadings existing in a dissolved
state. Thus, greater time and travel distance through the lake would
be required for sediment deposition to occur. This is supported by
sediment data showing increased metals concentrations occuring as the
northern end of the lake is approached.
The September vertical profiles and lake mile plots depict a
decrease in conductivity throughout the water column towards the north
end of Lake Coeur d'Alene. Assuming, through detention time calculations,
that the river water inflow under consideration in this situation
entered the lake during low flow conditions, the majority of heavy
metal loadings would be associated with settleable solids and thus
reach the lake bottom near the point of input. The September conductivity
vertical profile for station 153386 depicts a situation such as
this occuring.
January conductivity values show a generally constant ion
concentration throughout the lake at depth. This would seem reasonable
assuming that due to significantly colder input water an even mixing
within the lake would eventually occur in a northern direction.
Secchi disc readings respond to the flow cycles of the Coeur d'Alene
and St. Joe Rivers. Turbidity throughout the lake generally increases
during periods of high flow (with corresponding decreases in secchi disc
values).
-------
Ill
Surface values for total Phosphorous also seem cyclic with
lower concentrations occuring during the summer months due to increasing
primary production. In addition, total Zinc concentrations in the
surface waters range from approximately 100-300 ug/1, which exceeds
the Algalcidal concentration of 80 ug/1 throughout most of the year.
Data indicates this to be a widespread occurrence, with the majority
of Lake Coeur d'Alene being involved.
-------
11
9
III. DATA PRESENTATION
Figure C-44 shows station locations which
correspond to station graphs which follow
-------
EXVIBOmXTAL PROTECTION
DEPTH SOUNDINGS
IN
COEUR D'ALEHE LAKE, IDAHO
-------
114
STATION 153384
-------
• "iz-^i;-;
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FIGURE CE-45
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74/07/09
LAKE COUER D'ALENE STATION NO.153384
(single sample values)
74/09/30
A Designates sample value from St, Joe River at St. Maries
/ \ f mm approximately same time period as vertical plots.
74/07/11 = 13.0
__—_ Indicates "lake bottom
74/08/21 = 17.5
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74/12/17
74/12/73 - 1.0
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74/07/09
FIGURE CE-46
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74/09/30
LAKE CQUER D'ALENE STATION NO.153384
(single sample values)
Dissloved Oxygen Standard (6.0 mg/1)
Indicates lake bottom
M.
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74/12/17
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74/09/30
(single sample values)
pH Standard Range (6.50 - 9.00)
A Designates sample value on St. Joe River at St. Maries
/ \frnm approximately same time period cis yertlcal plots.
74/07/11 =6.80
74/08/21 = 6.80
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74/07/09 74/09/30
LAKE CODER D 'ALENE STATION NO.153384
(single sample values)
pH Standard Range (6.50 - 9.00)—
A Designates sample value on St. Joe River at St. Maries
/ \frnm approximately same time period as vertical plots.
74/07/11 =6.80
Ind1catp<
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74/12/17
74/12/13 - 6.1
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74/07/09
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FIGURE CE-49
L/.K.6 CO EUR D 'AUtHE NEAR DUJt TO I NT
VALUES 7+/0* - 74./1*
HANOI • 0 - o FC6T
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STATION isoos*
-------
120
FIGURE CE-50
•
LAKE COCUR D *ALCMC NEAR OtAIC rOZNT
SINGLE. SAfirLE VALUES 7+X04. - 7* -0a
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COEUR D -At-ENC HEAR BLUE
SINOLE SAMPLE VALUES
JAN
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STATION 133384-
-------
STATION 153386
-------
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LAKE COEUR D'ALENE STATION NO. 153386
13!
(single sample values)
Dissolved Oxygen Standard (6.0 mg/1)
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-------
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74/07/09
LAKE COEUR D'ALENE STATION NO.153386
(single sample values)
74/09/30
75/01/16
A
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from approximately same time period as vertical plots.
74/07/11 = 15.25
>. Indi cates 1ake bottom
74/08/20 - 16.50
75/01/22 - 1.50
-------
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LAKE COEUR D'ALENE STATION NO.153386
(single sample values)
pH Standard Range (6.50 -. 9.00) — {
A Designates sample value on Coeurd 'Alene River at Rose Lake
from approximately same time period as vertical plots.
75/01/16
74/07/11 - 6.60
74/08/20 -6.70
75/01/22 - 6.00
to
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75/01/16
COEUR D'ALENE STATION NO. 153386
(single sample values)
Dissolved Oxygen Standard (6.0 mg/1)
Incjtqates lake bottom
-------
FIGURE tt-bb
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74/07/10
,74/09/30
75/01/16
LAKE COEUR D'ALENE STATION NO. 153386
(single sample values)
Total Metals Z(Cd-Pb-Zn-Sb-Hg) (ug/1) --- •
A
Designates sample value cr/i Coeur d 'Alene River at Rose Lake
from approximately same time period as vertical plots.
74/07/U = 120
4
,•
Indicates .lake bottom
74/08/20 = 127
75/01/22 - 102
ro
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74/07/10 •"— .;•«•
(single sample values) j'-iv'j'-rj
"cates lake bottom ^7."^~,
tAKB, OCCUR B '"ALENC HCAB QA93CR rT AND DCLU BAY
nCAM VAUUCS T*/B* - 7S/BI
Ot^TH RAHOK • 0 - 3-rCCT
/OPR nsY JVM ju. /us 8a> ocT
OTATION 1S3300
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120
FIGURE CE-57
UAKC OOEUR D 'ALEWC HCAR OA99CR FT AND DCL,L> DAY
91 HOLE SAMPLE VALUES 74-X04. - 73XO1
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STATION 133300
COCUR o 'ALCHC HEAR OASSER rr AMD ocuu DAV
9XNOUC
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FIGURE CE-58'
LAK.E COEUR D *ALENE NEAR QASSER
2023-r
460--
3ZBJ--
12C3--
AND DELL DAY
DATE RANGE « 74./04- - 74V0Q
MEAN SURFACE SAMPLE VALUES
80 UG/L ALGALCIDAL CONCENTRATION
\ 1 1 (-
-TAN FEB
-I 1
AT'R MAY JUN JUL ALQ SEP OCT NOV DEC
STATION 13338S
ro
-------
130
STATION 153391
-------
FIGURE CE-59
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74/07/09
•74/09/30
75/01/16
LAKE COEUR D'ALENE STATION NO.153391
(single sample values)
Indicates lake bottom'
-------
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74/07/09
LAKE COEUR D'ALENE STATION NO.153391
(single sample values)
Dissolved Oxygen Standard (6.0 mg/1)
Indicates lake bottom
74/09/30
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75/01/16
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74/07/09
LAKE COEUR D'ALENE'STATION NO. 153391
(single sample values)
pH Standard Range (6.50 - 9.00) <
~> Indicates' lake bottom
zzs>:>L.i.::-J^^Jj:;!^:J:U:vl
74/09/30
75/01/16
CO
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74/07/09
LAKE COEUR D'ALENE STATION NO.153391
(single sample values)
Total Metals £(Cd-Pb-Zn-Sb-Hg) (ug/1)
Indicates "lake bottom'
74/09/30
MftI
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75/01/16
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STATIOfi 153391
74/07/09
(single sample values)
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LA*C OOtUR O 'ALtNt OFF MA.UF POUHO BAV
^.
I-IEAN VALUES 7*x»* - 79x01
DU»TH RANOC • a - a FCCT
L JL .1. i J—I
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STATION 1S330L
CO
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136
FIGURE CE-64 |
I_AKC COCUB D *At-ENC OFF* NAt-X ftOUHD OAV
3XPOI.C SAnFLt VALUES 74.X03 - 73X01
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FEB
STATION 133981
COCUR o 'AUENC OFF HAI_F POUND
3INOLC SAHFUt
- 73X01
9
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STATION 1333B1
C£C JAN FOB
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tazo--
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FIGURE CE-65.
LAKE COEUR D •ALEN'E OFF HALF ROUND DAY
DATE RANGE ° y-t/'eJ*- - 74-/0S
MEAN SURFACE SAMPLE VALUES
80 ug/1 ALGALCIDAL CONCENTRATION
I — i — i — I — i — 1 — I — h — i
i — I
JAN FEB MAR APR MAY JUN JUL ALO SEP CX^T NCV DEC
STATION
-------
138
STATION 153395
-------
r-"'rrn r^—:•:-(••:''**««*'»*''•'"•"t"*'' •:;!:••
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FIGURE CE-66
i / .: •! ..
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74/07/09
LAKE COEUR D'ALENE STATION N0.15339S
(single sample values)
Indicates lake bottom
74/09/20
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75/01/16
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FIGURE CE-67
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74/07/09
LAKE COEUR D'ALENE STATION NO.153395
(single sample values)
Dissolved Oxygen Standard '(6.0 mg/1)
Indicates lake bottom"
74/09/30
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75/01/16
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FIGURE CE-68
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74/07/09
LAKE COEUR D'ALENE STATION NO.153395
(single sample values)
pH Standard Range (6.50 - '9.00) —' —
Indicates lake bottom -
74/09/30
75/01/16
-------
FIGURE CE-69
ss:::|i::iljlfe:i!;s:::i|:ijj}1:ii!|!:r:li]i!|!-»;n.r::f!:-r:|»v.
H^TT^^^'yi^r^HiHl^te^te
vi!i
iiHi
*>;••.:: i Frri
I: .'.I..,: j;;::i;. m.i.:!.: M.« • • i.• IM.I • •!: «e«.« ; '•.• «
:;;; i-.: r.'l::... •:•• ::. -:-r.-..i•.;•.!•: t.:",!1:1
:;-:!:-?,.:::r.:• tTa'A-wrxi 21(u-.f»-i..»-iHi i»«i .::'• :r.
HrlEtilr-r.'t' 11 ttI'^.lSWlHMiTKiiitiniHr
• • •-1'; • ««» • • ; •• »if • • • •; «i»;;; • • l». :;!:;• •»•;•;
.. i_.. .._- —r -r-r- —:.|....;.-._, ... ~T7! -„ .-. .
:^. ::::j:i:: .~:ii:nt n:; t^.r r—p^fc:r.:r':; r:^.'7^r.-|::.'Li;:'^l'_-z.'i^T}—~—•^•rE:
**•**•*'**"**• **""** ****** ... *** *****••" >««^*.^*^» « ••••< '1-_- 1"! lui.t-g Li-±
74/07/09
LAKE COEUR D'ALEHE STATION NO.153395*
(single sample values) '. '. .
Total Metals S(Cd-Pb-Zn-Sb-Hg) (ug/1)
74/09/30
75/01/16
Indicates'lake bottopi
ro
-------
FIGURE CE-70
ffiffiBI
mr ;WTAI
- b.oi"^ i-'o'.iJf: — [-' -oidi -•
• • - i ..ii... ...
BJpMISjp;
t-o.q* —
T^-H-rrfH
ii:.
'100
—i ,
at::
T
O
T
H
O
a
R
—•" ; J{
0.0*0 -T-
..
E./! u
0.010+
STATION 153395 fH™; "
74/07/09 m vK-1----
(slngle sample values) ' {'•.'•rr::.'
h'."tiii~;:Tji',*\TT —^indicates'lake bottom '.izr.'.'r::
OOCUR D 'AHHt HOWTH OF COHO DAY
MEAN VALUC9 74./B4. - 73/Bl
RANOC <• 0 - a FCCT '
STATION XS338S '
-------
UE.0-T-
FIGURE CE-71
LAKE OCCUR D 'At-CNl NORTH Of tOKO BAY
AfiruC VACUC9 7*/T*. - 7AX01
PCTTH, RAHOC, - 9 - 9 FEET
O
M
L.
O
It
O
r
H
V
u
L
U
e
e.0- •
a.t
rv.v
JU. AU9 9S7 OBT KV
9TATZOH isaaas
•
LAKE OoeUR D 'ALKMC NORTH CT COHO DAY
9AMM.C VAUUC3 74^04- - 73/-01
9
C
C
O
U
I
p
I
9
O
D
C
I"
T
H
I
N
O
N
120- -
uess-
H r-
•«•»«
STATION
SET OCT
X33303
KV ' EGO JAN
FOB
-------
STATION 153397
-------
STATION 153397
-------
FIGURE CE-72
:.- — ',» --i,t • '.-uj> • ut> -"'-M^ : •" I .f:1T;
^.•--^Ki:
m
—^\
--:[--t\
H^:i:
iniHiiimi »jimii-'-n r^pnn^iinpiii^
^^|^:priww™TJ«Ui-»!HHiif4|?Hr}f:;}
-: ' ' •
74/07/09
LAKE COEUR D'ALENE StATION NO.153397
(single sample values) ~
Indicates lake bottom
74/09/10
uiwi^i'tUuiMiii •::: r.rH
1.1 .::;:.1.1..:. I'M :."
75/01/16
-------
FIGURE CE-73
!•:•.; .:•!::. : :i .
-•..i.: :l.;:•:.-::! •::
-•.-u-.: •::n:::. -::
:;.;[.:. I.::;, .: . :.
:;::ri:!!:.:"M:-r-:
74/07/09
LAKE COEUR D'ALENE STATION NO. 153397
(single sample values)
Dissolved Oxygen Standard* (6.0 mg/1) — --
* 74/07/09 vertical" plot subject to D.O. Standard
1n top 33 feet of water column only, due to the
presence of thermocline.
Indicates lake bottom
74/09/10
I
iiiillilJ i: ii ViiMmt!*?**»; !«•*?('! •:: | ii T: j! r • I i :• i j: •
.::::::'.«.• ,:j.' i.» ;:;: n.i":j: uj. '" N.I.:.J:I
ilti
• '
:i-r*l:
^J I. i * . . I !.* !_'" ! . •'!*"*" ' -" . .*
::':'::i:::.:i" |
*»F?%
Jl_:u.i,c:..J.
;:• .' • J •:.!:••[.:
:i:: :•'• I : :i ':ri:'
•!:•-'••• | .1 .::•:
: i>i;j^:-- :r.Ti-ni^
:;i!:i:i!:l!iji!:n
' iii'illlillh!1::^
75/01/16
CO
-------
FIGURE CE-74.
74/07/09
LAKE COEUR D'ALENE STATION NO.153397'
(single sample values)
pH Standard Range (6.50 - 9'.00) •'-
Indicates lake bottom
74/09/10
I':: Vt': i: I • Vt •; i : »V: j |': :«.t '•'•';'• 't.» ..:|i-;:
75/01/16
CO
-------
FIGURE CE-75
r.TewBunmn|."uiti*»i»'_":["..!...'
•-•i:-«.••' ••'• K(«:''!:''*eji':-''': •*.»• ''• Mfi •••::• •.
II
Jill
ill:
".:'•: •••rn[::-.:tTrirU':T|:::'.:~-:.:|: :"."•""
•:•:•.:I::::'.'.:.: :l!:'.::.::rrrrrr::!::•:•
'.•*;• : :::f":7:.:.
: prrr ;• ".rr~:. •
""'" "" ":
^ rii~;
" "
trMC-j. •:::!:;::
nti^--T-:**«
• •».» Mil-
r: r
4--:-.r.
'
:: /-.:::: :;•.!:::.r:.::i"::. -:i: '.:.:::;.::..:•: i
.. /"•'"'•"•• '••-':- ':•::•• :' ;•:•..! __.^j
• / |---; U-i:::;-Ji:l'':'' -••! •"•'" ' '•• ^
/Ti'iTr; iN"1:":|!{:"-::::ii'~;:yr' .•;.:•!
'..'i;1.:::^:::;.1;!::!::: ':::..:;:!:
74/07/09
LAKE CQEUR D'ALENE'STATION-NO.153397
(single sample values)
Total Metals £(Cd-Pb-Zn-5b-Hg) (ug/D—
74/09/10
RTTTTTT
.n(|l*- I..I.|I.» I . . . . I |l 1 . 1 | .» . I . . • •
1::: :i:i:
rji ijVI •'•"••»••'•••• n.i ;;":;M.I • •'••H.I
. I . . .J .7 ........
».-•• lfc i> • •••• <
:f:il
..i
i
i
rril'-r-iv:-:- "! ..iv.
.. • . . :. i . : : ;
75/01/16
Indicates" lake bottom
en
o
-------
(--
L
r-
1
%
r- —
• •
• * T
~H~'i~
Ji _,-
£tf
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— * —
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- — ;j-
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~ . 9 J — — .
•-M-- • '
r.1..'.':
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IZio
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jjj-j- j ; ; -
jffi^fc:
rrCT,
_ _,
• I
1 — — -
j
1
,-•
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,
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r
*
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— * *-
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^
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.
— ' —
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1-tuJ^li:
PlpSPHORLB;
Lzjigr.
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• 1 1 ^
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1 • ••-
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titt-y|-
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i — — — — ..
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ps
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— r— * -T-T-T
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J£:"&
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PS
15^
•
•
J — r-,— ,
J -.
, |
— r-t — • —
' ' I ' "
p ,
STATION 153397
74/07/09
(single sample values)
i> inrli rstp<; lalfp hnttnm
• •
0.04B-]
T
O
T
I 0*030-
r
H
0
9
r
o ••Bz»-
R
U
a
•
" 0.0UB-
O
c
.
FIGURE _CE-7£,
LAKE ooeun o 'AUCNC orr SAHOCRS DCAOH
MCAH VALUC3 7-WB*. - 73X01
OCFTM flAHOK - 0 - 3 FtCT
1 — H— j — + — 1 1 1 1 1 1 1
; ATT< rv>-r JUN ju. AJO s«y oeT KV ceo JAW res
J STATION 133307
!
1
1
-------
152
FIGURE CE-77
/ '
COEUR D 'At-cnt orr BANDERS BCACH
OXHOLE OAMTLC VALUES 74VB3 - 73X01
t»CTTH RAN0E « 0 - a
o
N
L
O
II
O
r
N
V
L
L
U
e
mv
JU_ ALB SEP OCT
STATION 1333B7
COEUR D 'At-CNE OFF SANDERS OEAOH
SAMPLE VALUES 7«x04. - 73x01
JAN
9
E
C
O
N
I
P
X
s
o
P
E
V
T
H
I
N
O
ao-
JVH Jii.
STATION
SEP
1333B7
ro/ tec
FTD
-------
T
O
T
A
L
Z
I
N
C
U
G
5CCJ-T-
3C2CJ--
22CJ--
1023
FIGURE CE-78
LAK.E COEUR D *ALENE OFF SANDERS BEACH
DATE RANGE o 74-/CJ4. - 74-/0Q
MEAN SURFACE SAMPLE VALUES
80 UG/L ALGALCIDAL CONCENTRATION
-1—I—^
JAN FEB MAR
APR MAY JUN JUL AUQ SEP OCT
STATION 1333S7
DEO
-------
154
B. SUBSTANDARD WATER QUALITY CONDITIONS
-------
B. SUMMARY OF SUBSTANDARD WATER QUALITY CONDITIONS I/
The standards of water quality under consideration, as established by the Idaho Board of
Environmental and Community Services include;
--Dissolved Oxygen; Greater than 6.0 mg/1 or 90% saturation.
— Hydrogen Ion Concentration (pH); Inside a range of 6.5 - 9.0.
STATION
153384
153386
153391
153395
153397
DATE
74/09/30
74/09/30
74/12/17
74/07/10
74/09/30
74/09/30
74/09/30
74/09/30
75/01/16
74/09/10
CONDITION
pFU6.5 at depths ^ 20'
D.O. ^6.0 at depths » 28'
pFU6.5 at all depths
pH L 6.5 at all depths
D. 0/6.0 at depths :?45'
pH-£6.5 at depths>21'
pH/:6.5 at depths ^35'
pH^6.5 at depths >33' .
pH^6.5 at depths :>33'
pH/i6.5 at depths^ 27'
If List depticts only those presented in
vertical profile graphs
y Percent figure considers all samoles taken
Percent substandard condition 21
Dissolved Oxygen
1/37 * 2.7X
3/50 -6.031
0/61 - O.OX
0/52 - 0.0%
0/52 = O.OX
pH
13/43 ° 30. 2X
19/60 - 31. 6X
23/68 - 33. 8X
19/58 - 32.7%
8/60 - 13.3%
H— '
en
0-7
-------
156
C. LAKE MILE PLOTS
Temperature, Dissolved Oxygen, pH, and Conductivity values are
graphed in this section by lake mile and are represenative for three
periods of temperature distribution within the lake;
*
- July - Thermocline forming
- September - Thermocline established
- January - Isothermal conditions
-------
TEMPERATURE
-------
n
p
E
R
A
T
U
R
E
c
E
N
T
20.0-1-
1B.0--
ia.0--
8.0--
FI6URE CE-79
LAKE CDEUR D 'ALENE ' 74./07X09
1«3 FT 2«1B FT 3«33 FT 4.BQB FT
»
SAMPLE VALUES
A(13.0)
A
A
A
IIS
Designates simple
at Rose Lake or St
approximately
sama
value
. Joe
time
on Coeur
River at
period
d
St
120
'Alene River IA •< p
. Maries from u^ist-
as Lake pile
Plot.
12S
\
\
133
MTl t " COEUR D 'ALENE
n^ub.5 RIVER
' 74/07/11
1
— j
13S
ST. OOE
RIVER
74/07/11 ,
co
-------
FIGURE CE-80
T
E:
n
•p
£
R
A
T
U
R
E
C
E
N
T
20.0-r-
113.0-
12.0--
8.0--
COEUR D *ALENE '74-X03/30
L«3 FT Zta33 FT 3<=B8 FT
3INC3LE SAMPLE VALUES
A (17.5)
A
A
/\
113 120
Designates s &mpl e value on Coeur
»t Rose LaV.e or St. Joe River at
"d 'Alene River L^KE,
St. Maries from
.
123
<
132J
MIUEIS COEUR D
niu&s RIVER
_]
— 1
133
'ALENE ST. JOE
RIVER
cn
CO
-------
FIGURE CE-81
T
E
n
p
E
R
A
T
U
R
E
N
T
20.0-r-
12.0-f-
8.0-t-
4-.0-I-
t_A*E COEUR D 'ALENE 73/01/iQ
1«3 FT 2=33 FT 3«B8 FT
SINQLE 3AHPUE VAUJE9
A.
A
A
I
1
i i
115 120
ample value on Coeur d 'Alene River , A „ e
0.5) A
123
COEUR t
MTt IT O- *., l:~~
•i O.o)^
1
133
) 'ALENE ST.
_j
n
133
JOE
at Rose Lake or St. Joe River at St. Maries from
approximately same tlma period as Lake Kile plot.
RIVER
75/01/22
74/12/13
-------
161
DISSOLVED OXYGEN
-------
p
I
s
o
V
E
D
O
X
Y
G
£
n
G
FI6URE CE-82^
LAKE COEUR D •ALCNC 74./07/0S
1S.0-T-
12.0
1«3 FT e=lS FT 3=>33 FT 4-taBB FT
SINGLE SAMPLE VALUES
S.0--
J^ajw Water. Q^al_it^_Standards_ , L .
3.0
A
A
1
1 1
115
120
LAKE
123
130
MILES COEUR D
DTWCD
'ALENE
1
1
133
ST. JOE
RIVER
cn
ro
-------
D
I
S
s
o
L
V
E
D
O
X
Y
G
E
N
M
Q
FIGURE CE-83
LAKE COEUR D 'ALENE 74-/0O/30
15.0-T-
ie.0--
B.EJ
3.0--
1=3 FT 2«>33 FT 3«8O FT
SINGLE 3AHPLE VALUES
Idaho Water Quality Standards
A
A
1
1
115 120 125
' IAKP MTI r^ COEUR D
LAKE MILES RJVER
130
'ALENE ST.
RIV!
133
JOE
iR
CD
Oo
-------
13.0-r
FIGURE CE-84
t .
LAKE COEUR D 'ALENE 73X01/18
1°3 FT 2»33 FT 3«8B FT
SINGLE SAMPLE VALUES
p
I
s
s
o
L
V
E
D
O
X
V
G
El
N
12.0-
3.0-
B.0-
n
Q
3.0--
/\
/\
i:
1
1
L5 120
LAKE
123
MILES
130
COEUR D
RIVER
'ALENE
1
133
ST. OOE
RIVER
CO
-------
HYDROGEN ION CONCENTRATION (pH)
-------
FIGURE CE-85
v ^
COEUR D 'ALENE 74./07X03
i«3 FT a°!B FT 3R33 FT 4-«88 .. FT
^
SINGLE SAMPLE VALUES
Standards
•p
H
S
u
8.2C5-
7.02-
S.02J—
L4§Jiq_Water_2LiaVi t^ Standards Al _
5.02J--
4-. 03-
A
A
1
L1S 120
Designates sample value on Coeur d 'Alene River LAKE
at Rose Lake or St. Joe River at St. Maries from
approxlaately sara time period as Lake tflle plot.
123
^
133
COEUR D
MILES RIVER
74/07/11
'ALENE
1
1
133
ST, OOE
RIVER
74/07/11
CD
cr,
-------
1 FIGURE CEJ36,
LAKE COEUR D 'ALENE. 7-4./0S/30
1=3 FT 2o33 FT 3080 FT
SINGLE SAMPLE VALUES
S
U
O.0Z-
B.EEJ
.7.JZEJ-
O.CCJ-
3.C33-
-.03-
Wat^r Quality St.ar^artU; __ . , .__, __ t , ..,
A
A
113
120 123
*
132J
133
. ^ T, ^ COEUR D 'ALENE ST.' JOE
Designates sample value on Coeur d 'Alene River • V-AKE nll_E.S RIVER RIVER
»t Rose L»ke or St. Joe River »t St. Maries from _.._^ _.
7fl/nR/?n /4/Ub/Zl
-------
FIGURE CE-871
i
LAKE COEUR D 'ALENE 73/01/10
•p
M
S
u
1CJ.1ZCJ-T-
9.02J-
B.02J-
7.JZO--
O.2CJ—
S.E32J--
-.02)
1«3 FT 2«»33 FT 3«ee FT
SINGLE SAMPLE VALUES
A(6.£
Idaho Water Quality Standards
A (6.0)
A.
A
A
•
113
pie value on Coeur d 'Alene River
120
LAKE
i
123
MILES
COEUR I
RIVER
* • •
130
) 'ALENE
ST.
RIV
1
1
133
JOE
ER
at Rose Lake or St. Joe River at St. Maries from
approximately same time period as Lake Hlle plot.
75/01/22
74/12/13.
CO
-------
Lfi:
CONDUCTIVITY
I
1
-------
o
o
N
rr
u
c
T
I
V
I
T
Y
M
I
C
R
O
n
H
o
FIGURE CE-8&
•— - vi \*
LAKE COEUR D 'ALENE 74./07/0a
73-r
FT a«ie FT 3°ee FJ 4.
SINGLE SAMPLE VALUES
FT
A (120)
60--
45--
A(38)
A
A
1
115 12S3
Designates sample vilue on Coeur d 'Alene River , Ai<.p
at Rose Lake or St. Joe River at St. Maries from l-^rsc-
approximately same time period as Lake ^lle plot.
123
4
133
COEUR D
MILES RIVER
74/07/11
'ALENE
I
1
133
ST. OOE
RIVER
74/07/11
O
-------
c
o
N
D
U
C
T
I
V
I
T
Y
n
I
c
R
o
M
H
O
73-r-
B2J--
32J--
13--
FIGURE CE-89
LAKE COEUR D 'ALENE 74-/'09/30
1.W3 FT 2«33 FT 3«=6e FT
SINGLE SAMPLE VALUES
A
A
/\
Designates sajnp
at Rose Lake o
.
le value on Coeur d 'Alene River
p St. Joe River it "^ n»^<«« *
1 1
1 1
120 125
. ' „ T , COEUR I
l_ ^ fS& MZLE.S r»T»fr-r»
1
-|,
3 'ALENE ST.
j
H
13S
JOE
-------
o
o
N
D
U
C
T
I
v
I
T
Y
fl
I
C
R
O
M
H
O
FIGURE CE-90
l
LAKE COEUR D 'ALENE 73/01/10
1«3 FT S.«33 FT 35>BB FT
SINGLE SAMPLE VALUES^
A (102)
4S
IS-
A
A
Designates sun
at Rose Lake o
approximately
113 120
pie value on Coeur d 'Alene River . Ahtp
r St. Joe River at St. Maries from (-/>INe-
tame time period as Lake fllle plot.
123
COEUR t
MILES RJVER
75/01/i
%
132J
) 'ALENE ST.
RIV
* 75y
_]
n
133
JOE
ER
'01/16
-------
D. SEDIMENT DATA
:j
U.I
-------
FIGURE CE-91
MILES 4
I I I I
Cougar Bay
I I I I I i
KM 6
Carlin Bay
Coeur d Alene River
2D
Cottonwood Bay
LAKE SEDIMENT SAMPLING LOCATIONS
Round Lake
Chatcolet Lake
St. Joe
River
174
SOURCE: Biological Impact of Combined Metallic and Organic Pollution In
tHiTcoeur d'Alcnc-Spokanc River Drainage System. William H. Funk, FretTW.
. and Royston Fllby, Principal Investigators. June 30, 1973.
-------
FIGURE CE-92
LAKE SEDIMENT METALS CONCENTRATIONS
(1971 - 1972)
Station Concentration mq/kq
~~CO FE liG SB
2D 61 100,000 435 93 1125
3D 68 75,100 660 120 3400
4D 49 — — — 5050
-- indicates no data available
SOURfE: Biological Impact of Combined Metallic and Organic Pollution In
the Coour d'Alene-Spokane River Drainage System. William H. Funk. Fred M.
Rube, and Roys ton Hlby, Principal Investigators. June 30, 1973.
-------
178
E. DETENTION TIME CALCULATIONS
-------
E. DETENTION TIME CALCULATIONS
Approximate calculations were performed to determine the
detention time for inflowing water from the Coeur d 'Alene and
St. Joe Rivers.
Four periods of the year were considered with the major variables
involved being river inout flow variation, temoerature relationships
between input and the lake itself, and the temoerature distribution
throughout the lake.
PERIOD
1
2
3
4
DATE
May 1
July 1
Sept 1
Jan 1
VOLUME DISPLACED
2.486 X 106 acre ft.
0.504 X 106 acre ft.
0.252 X 106 acre ft.
2.486 X 106 acre ft.
DETENTION TIME
40.5 days
125.4 days
95.8 days
91.0 days
Graphs of flow versus time are also included in section (E)
for the readers benefit, with the Coeur d 'Alene River at Rose
f'
Lake and the St. Joe River at St. Maries under consideration.
-------
178
FIGURE CE-93
ST. Jot Riven AT »T
* U.B.O.B. DATA nCAN VALUES
OlATC
• r
L
O
u
O
f
JUN JUL. MJ3 SET OCT rCV
COELIK O 'AUCHE RZVCR AT PO3C
U.9.0.9. DATA nCAN VALUES
CATC ItAHOe » T4-/-0L/TI -
f
U
O
u
-------
SPOKANE RIVER SUB-BASIN SECTION
GRAPH SET 7 - Spokane River river mile graphs Figs. CE-94 to CE-108
GRAPH SET 8 - Hangman Creek Station Trends Figs. SE-109'to CE-122
GRAPH SET 9 - Little Spokane River Station Trends Figs. CE-123 to CE-136
-------
180
GRAPH SET NO. 7
SPOKANE RIVER SUB-BASIN
Graph Set No. 7 illustrates the water quality throughout the
Spokane River during a high and low flow condition. These figures
allow the reader to identify variability, problem areas along the
river, and relate the river's water quality status to the two flow
conditions. Below the graphs are significant inflows located
appropriately along the river axis.
1AP OF SPOKANE AREA
-------
' FIGURE CE-94
SPOKANE RIVER
1 — 7CXi£X-(BI. TO 73X0ZX2S
£ .-- 73X07X0X TO 73X08X30
RIVCR nice
5 §
a t
5 ^
1 e
IS g
CO
-------
FIGURE CE-95
SPOKANE RIVER
1 7E/l£/f»l TO 73/02/31-
2 73/07/01 TO 73/0S/31
o
N
D
U
C
T
V
V
A
T
a
c
M
X
C
R
O
M
H
O
23- -
120
RXVtR YULE
i ' J '
I
I . i
E I
82
*i H
o
I/I
CO
co
-------
FIGURE CE-96
SPOKANE RIVER
I —
u
A
T
E
R
T
e
M
r
o
E.
H
T
E2-T-
20- -
18--
IB- -
14—-
12- -
e- -
WQ-PS 24-54-01
TO 73/03/31
73/BTTX01 TO 73/0Q/31
WQ-KPS
24-56-03
sa ea 70
f
RIV^R- MILE
eta
t t
e
j
s
Hi
j
> 4
. >
1 UJ C
3 t| 2 3
x LU v a »-
/i-l 1 • >n
4
1
•-• o
iS 2
. v-t t/i
CO
CO
-------
FIGURE CE-97
sat-
430-
Z
X
N
o
Z
N
T
O
T
U
O
X
L
4Gia- -
330- -
Pftft
ISO
a0- -
_
! I
SPOKANE RIVER
i — 7 ex text*! TO 73/02x23'
e -- 73/07X01 TO 73/0Q/31
V.
Me her lea Lethal Cone. I
Algacidal Cone. • 80 ug/1
40 90 .BE) 70
RIVER MILE
5. Ul .
h-
u
'•)
K
C
V)
O
O.
v-l
en
-------
FIGURE CE-98. w
SPOKANE RIVER
I 7ZS1ff/0l, TO 73/03X31
2 — 73/07/01 TO 73/0S/31
T
U
R
D
I
D
T
V
3
N
T
U
60 ^sas
RIVER
II
oc
%:
•f «
2 £
c
E
* X
n u
U
t 4
5 t
J u
, ;
Ll
J
£uj lil S g
"> H 2 _ ft
1
8
CO
01
-------
T
O
T
A
L
H
A
R
O
N
E
3
8
n
o
s
u
FIGURE CE-99 |
SPOKANE RIVER
uaa-r-
t — 7e/ie/Efi TO
a — 73/O7/01 TO 73/00/31.
76.-ifi.fn
S3- •
7EJ- -
BBJ- -
30- -
40-
359
RIVER
aa
103
. ;./.
a
3 3
y
i.
"»
t
. i
8\
CO
-------
t3-r
FIGURE CE-100
SPOKANE RIVER
I — 7Z/te/f5i TO 73X02/31
TO 73/00/31
D
O
n
a
s
u
1 1 1
I '
i i
33 .40 90 E0 70 60 SB 1£X3
RIVER
'
;
:;
tl
1
. a:
S
•
2 tU
-J g^
3 i ±3
t St 1*
3 3 5z
'Mtue
*
-
k '
J
*" Ju t
2 ^ §
J
•
i
5 5 uj z a!
£ 3 z p p
» 1 2ft £
CO
-------
0.C3
FIGURE CE-101
SPOKANE RIVER
I — 7BXI2/01 TO 73/03X31
2 — 73/07/01 TO 73/03/31
11, Mr**
ALQAL BLOOM LEVEL
RIVER'MILE
, 4
3 !
t i
a
LI
P^
L ,
C
J
a
5 r; :
S 55;
i
i
^
3 ..i t
. j
5 t
j i
. 4
j
i
•4 *~> ^ & oZ
cw D.UJ 2 5 j-j
J
•r
3
^ 5 "2 1 | .-£ b
= S ^5 £ 1 IS 1
-------
FIGURE CE-102 -
SPOKANE RIVER
yn
X -- 7a/l£/eJj. TO
2 73/07/01 TO
•0
-PS ?A-y.-m — * 1
73/02/31.
73XOIO s~»*
Vq-NPQ •)A_
-------
H
O
e
*
N
O
3
0.70-r
0.60-
0.30- -
0.40
T
O
T
A 0.30
L
M
O
X
L
0.20- -
0.10- -
FIGURE CE-103
SPOKANE RIVER
1 73/12X01 TO 73X02X31
a — 73X07X*0l TO 73X08X31
ALGAL BLOOM LEVEL
1 1 1
•30 40 90
1
S3 70 63 EC* IE
t ,
RIVER tllLE
i
:
•c
C
b
J
: (
* . t
a
*
*•
O
L
k ,
C
J
b
4
:
i • h
k ,
i t
j
-J *-* ' ** a y y
3 H Su . ui g £
"•3 M=i ? , K.
UJ J It
g g E
•59 *
j
«,
i
= 1 § 1 12 g
to
CD
-------
FIGURE CE-104 f
SPOKANE RIVER
TO 73/0EI/3V
TO 73/CJQ/3t
so ea 70
T •
RIVCR' MILE
'£
- VI
CO
-------
0.1
FIGURE CE-105
SPOKANE RIVER
I 72XIZX01 TO 73/06/31
Z -- 73X07X01 TO 73X0QX31
OA_c
0.B3 +
" 0.70+
n
O
N
I 0.B0 +
A
N *'**+
H
0.40+
N
0.32+
M
O
/ 0.20-
0.10 +
Organic Pollution Level
+ f J 1
70
RXVCR 't
1
** ^
uj 3
t 3
tea
IS I
cc
cc
-------
FIGURE CE-106
SPOKANE RIVER
t — 7e/iz/0i. TO 73/eje/3i.
a 73/»7X0l TO 73/08/31
T
O
T
O
R
O
O
A
R
D
O
N
M
O
X
L
B--
4- -
t- -
03
40
SO
70
t
<
i
2
^ i
'-
11 ' £a S
§3- "5 &
j
•
j ijj
8
g
CO
CO
-------
1 —
T
O
T
C
O
L
I
F
O
R
ISEBJ--
M
L
;FIGURE CE-107 '
b. Kl V t.K
TO 73/0E/31
73/07/01 TO 73/08/31
j WH-NP*
Wash. Class
Water Quali
3
1 1 1
g 40 az» '.e0 7
1 II
0 GIB ea IBS
RIVER MILE
i t
a 1
\ t ^ '
-3
1 51
O
hi CL k
? *" '
1
i \
j •
i
h
At
7 _
k i
5 t
i i
u
a
T
!
-------
SPOKANE
FIGURE CE-108
RIVER
F
E.
O
A
L
C
O
L
I
F
O
R
M
L
0
0
M
L
tqpi—
10- r
X — 7E/I2/01 TO 73/02/31
2 — • 73/07/01 TO 73/08/31
. _ 1 _uq_rn>
J o 2 ce
^** ^ VI _J __ iyi
I
i
CO
-------
GRAPH SET NO. 8
Graph Set No. 8 and 9 examine the water quality conditions
in Hangman Creek and the Little Spokane River respectively as
these are the major tributaries to the mainstem of the Spokane River.
These are indicative of the variability in trends, problem areas,
and the general status of their waters.
-------
9
T
R
E
A
M
F
L
O
U
100--
10--
c
F
3
FIGURE CE-109
SPOKANE RIVER BASIN
10/01 TO 73/08/30
AT MOUTH AT SPOKANE
DATE RANGED
i — HANGMAN CR.
S00 CFS
Hangman Creek
WQ-NPS
2A-57-04
30 CF9
S CF9
OCT
1 - 1 - 1 - 1 - 1 — H
MOV Dec JAN FED
1 -
APR MAY JUN JtJL. ALQ
CO
-------
w
A
T
£
R
T
£
n
•p
D
e
Q
FIGURE CE-110
SPOKANE RIVER BASIN
DATE RANGE** 72/1.0/01 TO 73/08/30
1--HANQMAN OR AT MOUTH AT SPOKANE
Hangman Creek
WQ-NPS
24-57-W
JTJN JU- AUO
OCT NCV DGD JAN FQ3
UD
CO
-------
T
U
R
D
I
D
I
T
Y
9
N
J
T
U
L2CE0—r~
FIGURE CE-111
SPOKANE RIVER BASIN
DATE RANGE" 72/10/01 TO 73/0Q/30
I--HANQMAN CR AT MOUTH AT SPOKANE
IUngB«n Creek
WQ-NPS
24-37-OV
MAR APR MAY JTJM JUU ALO
OCT NOV
CO
CO
-------
T
O
T
A
L
H
A
R
D
N
E
9
3
M
Q
X
L
16EJ--
1S3--
140--
60- -
S3--
40--
20--
FIGURE CE-112 -
SPOKANE RIVER BASIN
DATE RANQE«» 72X10/01 TO 73X08/30
L HANOMAN OR AT MOUTH AT SPOKANE
H*ngnan Creak
WQ-NPS
24-57-04'
•4—1
OCT NOV DGD JAN FEO tV*R APR
MONTH
JTJN JUU AUO SEP
to
O
O
-------
D
I
3
S
o
L
V
E
D
O
X
Y
O
E
N
M
Q
IQ-T-
13--
14---
13- -
12--
11- -
S--
7--
FIGURE CE-113,
SPOKANE RIVER BASIN
DATE RANQE« 72/10/01 TO 73/08/30
1 HANGMAN CR AT MOUTH AT SPOKANE
CLASS A STANDARD
OCT
^—\-
H—i—i—i—i
JAN FEB MAR APR MAV JUH JUU AUQ
•J 1
-------
iflJ-T-
FIGURE CE-114
SPOKANE RIVER BASIN
DATE RANGE" 7Z/10/01 TO 73X08/30
I HANGMAN OR AT MOUTH AT
8--
e--
p
H
7--
OLAS3 A STANDARD
Rang&an Creek
WQ-NPS
24-57-04'
e--
OCT ' NOV ' DED ' JAN ' FEB ' MAR ' APR ' MAY ' JUN ' JUL ' AU3 ' '
MONTH
O
: to
-------
FIGURE CE-115
C
O
N
D
U
C
T
V
Y
A
T
2
3
C
M
I
C
R
O
M
H
O
330-r
300--
400--
350- -
300-
2S0--
22CJ- -
SPOKANE RIVER BASIN
DATE RANGED 72/10/01 TO 73/08/30
1 HANGMAN CR AT MOUTH AT SPOKANE
Hangnan Creek
WQ-NPS
24-57-04'
cxrr NOV DEC
TAN
FEB MAR APR MAV J\JN JT_I_
-------
FIGURE CE-116
SPOKANE RIVER BASIN
T
O
T
A
L
O
R
Q
O
A
R
B
O
N
tl
Q
4O-T-
30--
23--
20--
1S--
S- -
DATE RANQE« 7BX10/'0l TO 73/08/'30
I -- HANQMAN OR AT MOUTH AT SPOKANE
Hangnaq Creek
WQ-NPS
24-57-04
OCT MOV DEC JAN FED MAR APR MAY JVJN JUL AUQ
TO
-------
FIGURE CE-117
T
O
T
A
L
N
O
2
+
N
O
3
M
O
2.02J--
1.S0- -
1.00- -
0.S0- -
SPOKANE RIVER BASIN
DATE RANGE" 7E/'10/I31 TO 73/0SX3P
1--THANQMAN CR AT MOUTH AT SPOKANE
Hangman Creek
wq-NPs
24-57-04'
ALQAL BLOOM POTENTIAL
- 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1
--
OCT NCA/ EGO JAN FED MAR APR MAY JTJN JUL. AUQ
-------
FIGURE CE-'l"
A
M
M
o
N
z
A
N
H
3
N
M
Q
0.U3--
SPOKANE RIVER BASIN
DATE RANQE« 72/10/01 TO 73/08/30
1 HANGMAN CR AT MOUTH AT SPOKANE
Hangman Creek
WQ-NPS
24-57-W
WATER SUPPLY
PUBLIC
OCT NOV DEC JAN
APR MAY JUN JUL AUQ SEP
MONTH
cr
-------
FIGURE CE-U9
SPOKANE RIVER" BASIN
DATE RANGE* 72/10/01 TO 73/08/30
1--HANOMAN OR AT MOUTH AT SPOKANE
T
O
T
A
H
O
3
0.1--
n
Q
WQ-NP8
2A-37-04-
ALGAL BLOOM POTENTIAL
-------
p
z
3
Q
R
T
H
O
P
H
O
9
M
Q
L
P
0.14.-1-
0.12- -
0.10--
0.08- -
0.09- -
0.04---
0.02- -
FIGURE CE-120-
SPOKANE RIVER BASIN
DATE RANQE« 72/10/01 TO 73/08/30
1 HANGMAN OR AT MOUTH AT 9POKANE
Hangman Creek
UQ-NPS
24-57-W
ALQAL BLOOM PtDTENTlAL
OCT NC3V DEC JAN FED MAR APR MAY JUN JUL AUQ SEP
ro
-------
FIGURE CE-121
»
SPOKANE RIVER BASIN
T
A
U
c
o
L
I
F
O
R
M
1
0
0
ft
L
DATE RANQEe 72/10/01 TO 73/0S/30
1 HANGMAN OR AT MOUTH AT SPOKANE
Hangman Creek
WQ-NPS
24-57-04
OCT MOV DEC JAN FED MV? APR
-------
FIGURE CE-122-
F
E
C
A
L
C
O
l_
I
F
O
R
M
L
0
0
M
L
100--
SPOKANE RIVER BASIN
DATE RANGE* 72/10/01 TO 73/00/30
1--HANC3MAN OR AT MOUTH AT SPOKANE
Hangman Creek
WQ-NPS
24-37-04'
- tiiiiimiiitiiimimiiiii
Recommended EPA
^IIIIIIIIIIIIIIIIIIKIIIIIIIIIMIItllllllllllllllllltlllllllllllllllllliillUn
Criteria Level
OCT MOV DEC JAN FED MAR APR MAY JUN JTJU
MONTH
I I . I 1
to
K»<
<•"*>
-------
211
GRAPH SET NO. 9
LITTLE SPOKANE RIVER
-------
FIGURE CE-123>
9
T
R
e
A
M
6BJ3-T-
780- -
F
L
O
U
932)—
4GXD--
333- -
£20—
O
F
a
SPOKANE RWER BASIN
DATE RANOE« 72/10/01 TO 73/08/30
1 -- LITTLE SPOKANE R. NR. MOUTH . RM l.|
2 -- LITTLE SPOKANE R AB WANDERMERE ^M l\:5
Lie tie Spokane. Rivtt
WQ-NPS 2*^55-02
I - 1 - 1 - 1 - 1— H - 1 - t—H - 1- - 1
--
.
C3CT NOV DEC JAN FED tW* APR
MONTH
JUN JUL AU3 SEP
I—'
-------
FIGURE CE-124
U
A
T
£
R
20*
18 ""
T
E
M
P
14—-
12--
D
E
Q
SPOKANE Rlv/ER BASIN
DATE RANOE" 72/10/01 TO 73/03X30
1 LITTLE SPOKANE RIVER NEAR MOUTH RM I.I
2 LITTLE SPOKANE R ABV WANDERMERE
Little Spokane Rive?
WQ-NPS 24,55-02
OCT NCfS/ DGD JAN FEES MAR APR MAY JUN JTJL
-------
FIGURE CE-125.
T
U
R
B
Z
D
Z
T
V
J"
K
3
N
J
•T
U
SPOKANE RIVER BASIN
DATE RANQE* 7Z/10/01 TO 73/00/30
I LZTTLE SPOKANE RIVER NEAR MOUTH
2 LZTTLE SPOKANE R ABV WANDERMERE RM 11.5
Little Spokana Rlvar
UQ-NPS 24f55-02
H •—H
CJCT NOV DEC JAN FEB
APR MAY JUN JUL AJLQ
MONTH
to
-------
FIGURE CE-126,
C
o
N
D
U
C
T
V
Y
A
T
3
C
M
I
C
R
O
M
H
O
403-!-
400--
330- -
220- -
2ECJ- -
1£CJ- -
SPOKANE RIVEk BASIN
DATE RANGE** 7Z/10/01 TO 73/08X30
1 LITTLE SPOKANE RIVER NEAR MOUTH fcM \.j
&—LITTLE SPOKANE R ABV WANDERMERE RM U*5
Littl* Spoluna
WQ-NPS 24-r55-02
OCT
-I 1 1 1 \
ceo
-TAM
-I 1-
-------
FIGURE CE-12"??
T
O
T
A
L
H
A
R
D
N
E
3
9
M
Q
ie0-r
IQZ»4-
1404-
1204-
1004-
604-
e04-
404-
SPOKANE RIVER, BASIN
DATE RANQEw 72X10X01 TO 73X09X30
1--LXTTLE, SPOKANE RIVER NEAR MOUTH
S. -- LITTLE SPOKANE R ABV WANDERMERE
Little Spokane River
WQ-NPS 24f55-02
R/A \,\
204-
' ' ' ' ' ' ' ' ' ' ' - '
OCT NOV DEC TAN FED Mf& APR
MONTH
JTJN JUL AUO
to
h-«
cr
-------
FIGURE CE-128
10-1-
SFOKANE RIVER BASIN
DATE RANOE« 72/10/01 TO 73/08/30
1 -- LITTLE, SPOKANE. RIVER NEAR MOUTH
2 -- LITTLE SPOKANE R ABV WANDERMERE
Little Spokana River
UQ-NPS 2AT55-02
\\.$
CLASS A STANDARD
e4-
p
H
74-
CLASS A STANDARD
B4-
H }•
I... I I
OCT " NOV " TTEO " JAN " FED
APR ' MAY ' JUN ' JUL ' AUO
-------
FIGURE CE-129
D
X
S
3
O
L
V
E
D
O
X
Y
Q
E
N
13-r
14.-*-
134-
12-4-
SPOKANE RIVER BASIN
DATE RANOEn 72/10/01 TO 73/08/30
i -- LITTLE SPOKANE RIVER NEAR MOUTH
2 -- LITTLE SPOKANE R ABV WANDERMERE
LlCCla Spokane River
WQ-NPS 2A-r55-02
KM
104-
a4-
M
Q
CLASS A STANDARD
OCT NOV DEO JAN FED
I !_..!_. I .._!._!
APR MAY JUN JUL AUC3
MONTH
I ^
! CC
-------
FIGURE CE-130y
T
O
T
A
L
N
O
2
+
N
O
3
M
Q
1.20--
1.00- -
0.60- -
0.Q0--
0.40--
0.20--
SPOKANE RIVER BASIN
DATE RANOEe 72/10/01 TO 73/08/30
1 -- LITTLE SPOKANE RIVER NEAR MOUTH
£ — LITTUE SPOKANE R ABV WANDERMERE
Litcla Spokane River
|.|
ALGAL BLOOM POTENTIAL
OCT NCV
•i—I—I—I—I—I—I—I—I—I—I
Dec JAN FEB MAR APR MAY Jt_N JTJ AI n otro '
-------
0.60T
FIGURE CE-111
SPOKANE RIv/ER BASIN
*.
DATE RANQE« 72/10/01 TO 73/08/30
I LITTLE SPOKANE RIVER NEAR MOUTH
2 LITTLE 9J»OKANE R ABV WANDERMERE
Little Spokane River
WQ-NPS 2AT55-02
U-5
_RECOMMENDED FOR PUBLIC
WATER SUPPLY
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUQ
to
ro
-------
T
O
T
A
L
P
H
O
3
M
Q
L
P
t--
0.L--
FIGURE CE-132.
SPOKANE RlN/ER BASIN
DATE RANGE* 72/10/01 TO 73/08/30
1--L.ITTLE SPOKANE RIVER NEAR MOUTH
2--LITTLE SPOKANE R ABV WANDERMERE
Little Spokane River
ftQ-NPS 24-r55-02
OCT " NOV D£D JAN FED MAR APR MAY JTJN JLJL AU3
ro
ro
-------
D
I
9
o
R
T
H
O
P
H
O
9
M
Q
X
L
P
0.01
- FIGURE CE-133
SPOKANE R1>/ER BASIN
DATE RANGE* 7Z/10/01 TO 73/0Q/30
i LITTLE SPOKANE RIVER NEAR MOUTH RM 1.1
& LITTLE SPOKANE R ABV WANDERMERE RMIK5
Little Spokane River
WQ-NPS 2A-r55-02
OTENTI
APR rVSY JTJN JUL AUQ
OCT NOV DEC JAN FEB
ro
•ro
-------
T
O
T
A
L
O
R
Q
O
A
R
0
O
N
M
Q
FIGURE" CE-13V
SPOKANE RIVER BASIN
DATE RANGE* 72/10/-01 TO 73/-0S/30
I LITTLE SPOKANE RIVER NEAR MOUTH IVA |.|
2--LITTLE SPOKANE R ABV WANDERMERE r^M IIS"
Little Spokane River
WQ-NPS 24-r55-02
APR MAY JLJN
C3CT NC3V DEC JAN FEB
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FIGURE CE-135
T
O
T
A
L
C
O
L
Z
F
O
R
M
1
0
0
M
L
SPOKANE Rlv/ER BASIN
DATE RANOE«» 7S/10/01 TO
1 LITTLE SPOKANE RIVER
•—LITTLE SPOKANE R ABV
73/0Q/30
NEAR MOUTH
WANDERMERE
lt.3
Little Spokane River
WQ-NPS 24,55-02
DEC JAN FED
APR
JTJN JUL AUO SEP
ro
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\sxooy~"
FIGURE CE-136 '
SPOKANE RIVER BASIN
DATE RANGE* 72/10/01 TO 73/0S/30
i — LITTLE SPOKANE RIVER NEAR MOUTH
2 — LITTLE SPOKANE R ABV WANDERMERE
Little Spokane River
WQ-NPS 2A-r55-02
M
c
A
L
C
O
L
I
F
O
R
M
1
0
0
M
L
100- -
ro
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