U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
HELLS (MON RESERVOIR
BAKER AND WflJJOWA COUNTIES, OREGON
/WE AND IDAHO COUNTIES, IDAHO
EPA REGION X
WORKING PAPER No, 829
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
-------
REPORT
ON
HELLS CANYON RESERVOIR
BAKER AND WALLOWA COUNTIES, OREGON
AND IDAHO COUNTIES, IDAHO
EPA EGION X
WORKING PAPER No, 829
WITH THE COOPERATION OF THE
OREGON DEPARTMENT OF ENVIRONMENTAL QUALITY,
THE IDAHO DEPARTMENT OF HEALTH AND WELFARE,
AND THE OREGON I'knoNAL GUARD
APRIL, 1978
-------
i
CONTENTS
Page
Foreword ii
List of Oregon Lakes and Reservoirs iv
Lake or Reservoir Drainage Area Map v
Sections
I. Conclusions 1
II. Drainage:Basin Characteristics . 4
III. Water Quality Summary 5
IV. Nutrient Loadings 9
V.. Literature Reviewed 13
VI. Appendices • 14
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ii
FOREWORD
The National Eutrophication Survey was initiated in 1972 in
response to an Administration commitment to investigate the nation-
wide threat of accelerated eutrophication to freshwater lakes and
reservoirs.
OBJECTIVES '.
The Survey was designed to develop, in conjunction with state
environmental agencies, information on nutrient sources, concentrations,
and impact on selected freshwater lakes as a basis for formulating
comprehensive and coordinated national, regional, and state management
practices relating to point-source discharge reduction and non-point
source pollution abatement in lake watersheds.
ANALYTIC APPROACH
The mathematical and statistical procedures selected for the
Survey's eutrophication analysis are based on related concepts that:
a. A generalized representation or model relating
sources, concentrations, and impacts can be constructed.
b. By applying measurements of relevant parameters
associated with lake degradation, the generalized model
can be transformed into an operational representation of
a lake, its drainage basin, and related nutrients.
c. With such a transformation, an assessment of the
potential for eutrophication control can be made.
LAKE ANALYSIS
In this report, the first stage of evaluation of lake and water-
shed data collected from the study lake and its drainage basin is
documented. The report is formatted to provide state environmental
agencies with specific information for basin planning [§303(e)], water
quality criteria/standards review [§303(c)l, clean lakes [§314(a,b)]5
and water quality monitoring [§106 and §305(b)] activities mandated
by the Federal Water Pollution Control Act Amendments of 1972.
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iii
Beyond the single lake analysis, broader based correlations
between nutrient concentrations (and loading) and trophic condi-
tion are being made to advance the rationale and data base for
refinement of nutrient water quality criteria for the Nation's
fresh water lakes. Likewise, multivariate evaluations for the
relationships between land use, nutrient export, and trophic
condition, by lake class or use, are being developed to assist
in the formulation of planning guidelines and policies by EPA
and to augment plans implementation by the states.
ACKNOWLEDGEMENT
The staff of the National Eutrophication Survey (Office of
Research & Development, U. S. Environmental Protection Agency)
expresses sincere appreciation to the Oregon Department of
Environmental Quality and the Idaho Department of Health and
Welfare for professional involvement and to the Oregon National
Guard for conducting the tributary sampling phase of the Survey.
William H. Young, Director; Harold L. Sawyer, Administrator,
and the staff of the Water Quality Control Division of the Oregon
Department of Environmental Quality; and the staff of the Division
of Environment of the Idaho Department of Health and Welfare
provided invaluable lake documentation and counsel during-the
Survey, reviewed the preliminary reports, and provided critiques
most useful in the preparation of this Working Paper series.
Brigadier General Richard A. Miller, the Adjutant General
of Oregon, and Project Officer Lt. Colonel John Mewha, who directed
the volunteer efforts of the Oregon National Guardsmen, are also
gratefully acknowledged for their assistance to the Survey.
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IV
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES and RESERVOIRS
STATE OF-OREGON
NAME COUNTY
Brown!ee Baker, OR; Washington, ID
Diamond Douglas
Hells Canyon Baker, Wai Iowa, OR; Adams,
Idaho, ID
Hills Creek Lane
Owyhee Malhuer
Oxbow Baker, OR; Adams, ID
Suttle Jefferson
Waldo Lane
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OREGON IDAHO
Hap Location
Copper!,eld •
45'lO-
HELLS CANYON RESERVOIR
® Tributary Sampling Site
X Lake Sampling Site
4<00'-
Scale
• Km.
5 Mi.
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HELLS CANYON RESERVOIR
STORE! NO. 4103
CONCLUSIONS
A. Trophic Condition:
Survey data indicate Hells Canyon Reservoir is eutrophic.
It ranked nineteenth in overall trophic quality when the 21
Oregon and Idaho lakes and reservoirs sampled in 1975 were com-
pared using a combination of six water quality parameters*.
Fifteen of the water bodies had less median total phosphorus,
19 had less median dissolved orthophosphorus and inorganic
nitrogen, 18 had less mean chlorophyll a_, and 16 had greater
mean Secchi disc transparency. Marked depression of dissolved
oxygen with depth occurred at station 1 in August.
Survey limnologists noted a few emergent macrophytes along
the shoreline in April. The rather high chlorophyll ^concen-
trations in April and August indicate possible bloom conditions
at those times.
B. Rate-Limiting Nutrient:
The algal assay results are not considered representative
of conditions in the reservoir at the times the samples were
collected due to significant changes in nutrient concentrations
in the samples during shipment from the field to the laboratory.
The reservoir data indicate phosphorus limitation in April
and nitrogen limitation in August and September.
* See Appendix A.
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2
C. Nutrient Controllability:
1. Point sources—No known point sources directly impacted
Hells Canyon Reservoir during the sampling year. However, point
sources which discharge to the Snake River upstream may be of
significance since nearly 94% of the total phosphorus load leaving
Brownlee Reservoir* reaches Hells Canyon Reservoir via Oxbow
Reservoir*.
The present phosphorus loading of 93.11 g/m2/year is 12 times
that proposed by Vollenweider (Vollenweider and Dillon, 1974)
as a eutrophic loading (see page 12). Although Vollenweider's
model may not be applicable to water bodies with short hydraulic
retention times, the trophic condition of Hells Canyon Reservoir
is evidence of excessive nutrient loads. Any improvement in water
quality would involve the minimization of nutrient loads from both
non-point sources and the point sources impacting upstream Brownlee
Reservoir.
2. Non-point sources—As considered in this report, "non-point"
sources include those contributing nutrients as a result of human
activities (e.g., agricultural practices, urbanization, extractive
processes, etc.) as well as natural sources (i.e., direct precipi-
tation, leaf fall, wild birds and animals, etc.).
the apparent non-point source phosphorus contribution accounted
for all of the load to Hells Canyon Reservoir during the sampling
year. However, as noted above, much of the load is due to point
sources upstream beyond the 40-kilometer Survey limit**.
* Respectively, Working Paper No. 827 and 832.
** See Working Paper No. 175, "...Survey Methods, 1973-1976".
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3
The Snake River contributed 95.0% of the total phosphorus
load, Indian Creek contributed 0.4%, and Pine Creek contributed
3.2%. The ungaged minor tributaries and immediate drainage con-
tributed an estimated 1.4%.
The phosphorus export rates of Indian and Pine creeks,
39 and 51 kg/km2/year, were quite high as compared to the
rate of the Snake River (5 kg/km2/year) and may indicate the
influence of land-use practices in the immediate drainage area.
A further investigation would be needed to determine this.
However, water quality improvement in Hells Canyon Reservoir
would still require reduction of the nutrients impacting the
Snake River which contributed 94% of the load.
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II. RESERVOIR AND DRAINAGE BASIN CHARACTERISTICS7
tt
A. Morphometry :
1. Surface area: 10.12 kilometers2.
2. Mean depth: 20.4 meters.
3. Maximum depth: 64.9 meters.
4. Volume: 206.881 x 106 m3.
5. Mean hydraulic retention time: 4 days.
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Drainage Mean flow
Name area (km2)* (m3/sec)*
Snake River 188,810.9 532.660
Indian Creek 102.8 1.940
Pine Creek 595.7 10.860
Minor tributaries &
immediate drainage - 327.4 8.490
Totals 189,836.8 553.950**
2. Outlet -
Snake River 189,846.9*** 553.950
C. Precipitation****:
1. Year of sampling: 27.0 centimeters.
2. Mean annual: 27.3 centimeters.
t Table of metric equivalents—Appendix B.
tt McHugh, 1972.
* For limits of accuracy, see Morking Paper No. 175.
** Sum of inflows adjusted to equal outflow.
*** Includes area of reservoir.
**** See Working Paper No. 175.
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5
III. WATER QUALITY SUMMARY
Hells Canyon Reservoir was sampled three times during the open-water
season of 1975 by means of a pontoon-equipped Huey helicopter. Each time,
samples for physical and chemical parameters were collected from two or
more depths at three stations on the reservoir (see map, page v). During
each visit, a single depth-integrated (4.6 m to surface) sample was com-
posited from the stations for phytoplankton identification and enumeration;
and during the first and last visits, a single 18.9-liter depth-integrated
sample was collected from each of the stations for chlorophyll a^ analysis.
The maximum depths sampled were 48.8 meters at station 1, 29.0 meters at
station 2, and 16.2 meters at station 3.
The sampling results are presented in full in Appendix D and are sum-
marized in the following table.
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A. SUMMARY OF PHYSICAL AND
CHEMICAL CHARACTERISTICS FOR
STORET CODE 4103
HELLS CANYON RESERVOIR
PARAMETER
TEMP (C)
DISS OXY (MG/L)
CNDCTVY (MCROMO)
PH (STAND UNITS)
TOT ALK (MG/L)
TOT P (MG/L)
ORTHO P (MG/L)
N02+N03 (MG/L)
AMMONIA (MG/L)
KJEL N (MG/L)
INORG N (MG/L)
TOTAL N
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B. Biological characteristics:
1. Phytoplankton -
Sampling
Date
04/08/75
08/04/75
09/15/75
2. Chlorophyll a_ -
Sampling
Date
04/08/75
08/04/75
09/15/75
Domi nant
Genera
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
Stephanodiscus sp.
Asterionella sp.
Melosira sp.
Fragilaria sp.
Surirella sp.
Other genera
Total
Fragilaria sp.
Melosira sp.
Asterionella sp.
Skeletonema sp.
Cryptomonas sp.
Other genera
Total
Chroomonas (?) sp.
Melosira sp.
Stephanodiscus sp.
Cryptomonas sp.
Schroederia sp.
Total
Station
Number
1
2
3
1
2
3
1
2
3
Algal Units
per ml
7,332
296
148
111
111
334
8,332
6,928
3,322
608
405
162
163
11,588
795
614
36
36
36
1,517
Chlorophyll a^
27
17
22.8
33
30
9.6
7.5
9.8
10.0
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8
C. Limiting Nutrient Study:
The algal assay results are not considered representative
of conditions in the reservoir at the times samples were col-
lected (04/08/75 and 09/15/75) due to significant nutrient
changes in the samples during shipment from the field to the
laboratory.
The reservoir data indicate phosphorus limitation in April
and nitrogen limitation in August and September. The mean
inorganic nitrogen/orthophosphorus ratios were 18/1 or greater
at all stations in April and 13/1 or less at all stations in
August and September.
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IV. NUTRIENT LOADINGS
(See Appendix E for data)
For the determination of nutrient loadings, the Oregon National
Guard collected monthly near-surface grab samples from each of the
tributary sites indicated on the map (page v), except for the high
runoff months of January and February when two samples were collected.
Sampling was begun in October, 1974, and was completed in September, 1975.
Through an interagency agreement, stream flow estimates for the
year of sampling and a "normalized" or average year were provided by
the Oregon District Office of the U.S. Geological Survey for the tri-
butary sites nearest the reservoir.
In this report, nutrient loads for sampling tributaries were deter-
mined by using a modification of a U.S. Geological Survey computer pro-
gram for calculating stream loadings*. Nutrient loads for unsampled
"minor tributaries and immediate drainage" ("ZZ" of U.S.G.S.) were
estimated using the nutrient loads at station C-l, in kg/km2/year,
and multiplying by the ZZ area in km2.
No known wastewater treatment plants directly impacted Hells Canyon
Reservoir during the sampling year.
* See Working Paper No. 175.
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10
A. Waste Sources:
1. Known municipal - None
2. Known industrial - None
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
kg P/ % of
Source ,y_r total
a. Tributaries (non-point load) -
Snake River 895,060 95.0
Indian Creek 3,985 0.4
Pine Creek 30,295 3.2
b. Minor tributaries & immediate
drainage (non-point load) - 12,770 1.4
c. Known municipal STP's - None
d. Septic tanks - None
e. Known industrial - None
f. Direct precipitation* - 175 < 0.1
Total 942,285 100.0
2. Outputs -
Reservoir outlet - Snake River 1,017,465
3. Net annual P loss - 75,180 kg.
* See Working Paper No. 175.
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11
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
Source
a. Tributaries (non-point load) -
kg N/
yr
Snake River
Indian Creek
Pine Creek
25,222,530
68,915
367,060
b. Minor tributaries & immediate
drainage (non-point load) - 219,360
c. Known municipal STP's - None
d. Septic tanks - None
e. Known industrial - None
f. Direct precipitation* - 10,925
Total 25,888,790
2. Outputs -
Reservoir outlet - Snake River 21,630,255
3. Net annual N accumulation - 4,258,535 kg.
D. Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr
Snake River
Indian Creek
Pine Creek
5
39
51
£. Mean Nutrient Concentrations in Ungaged Stream:
Tributary
Kinney Creek
Mean Total P
Cone, (mg/1)
0.042
% of
total
97.4
0.3
1.4
0.8
< 0.1
100.0
kg N/km2/yr
134
670
616
Mean Total N
Cone, (mg/1)
0.654
* See Working Paper No. 175.
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12
F. Yearly Loads:
In the following table, the existing phosphorus loadings
are compared to those proposed by Vollenweider (Vollenweider
and Dillon, 1974). Essentially, his "dangerous" loading is
one at which the receiving water would become eutrophic or
remain eutrophic; his "permissible" loading is that which
would result in the receiving water remaining oligotrophic
or becoming oligotrophic if morphometry permitted. A meso-
trophic loading would be considered one between "dangerous"
and "permissible".
Note that Vollenweider's model may not be applicable to
water bodies with short hydraulic retention times.
Total Phosphorus Total Nitrogen
Total Accumulated Total Accumulated
grams/mVyr 93.11 loss* 2,558.2 420.8
Vollenweider phosphorus loadings
(g/m2/yr) based on mean depth and mean
hydraulic retention time of Hells Canyon Reservoir:
"Dangerous" (eutrophic loading) 7.60
"Permissible" (oligotrophic loading) 3.80
* There was an apparent loss of phosphorus during the sampling year. This
may have been due to solubilization of previously sedimented phosphorus,
recharge with phosphorus-rich ground water, unsampled point sources dis-
charging directly to the reservoir, or (probably) insufficient outlet
sampling in relation to the very short hydraulic retention time of the
reservoir.
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13
V,, LITERATURE REVIEWED
McHugh, Robert A., 1972. Interim study of some physical, chemical,
and biological properties of selected Oregon lakes. OR Dept.
of Environ. Qual., Portland.
Vollenweider, R. A., and P. J. Dillon, 1974. The application of
the phosphorus loading concept to eutrophication research.
Natl. Res. Council of Canada Publ. No. 13690, Canada Centre
for Inland Waters, Burlington, Ontario.
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14
VI. APPENDICES
APPENDIX A
LAKE RANKINGS
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LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
1601 AMERICAN FALLS RESERVOIR
1602 CASCADE LAKE
1603 LAKE COEUR D'ALENE
1604 DWORSHAK RESERVOIR
1605 HAUSER
1606 HAYDEN LAKE
1607 ISLAND PARK RESERVOIR
1608 LAKE LOWELL
1609 MAGIC RESERVOIR
1610 PALISADES RESERVOIR
1611 LOWER PAYETTE
1612 LOw/ER TWIN LAKES
1613 UPPER TWIN LAKES
4101 6ROWNLEE RESERVOIR
4102 DIAMOND LAKE
4103 HELLS CANYON RESERVOIR
4104 HILLS CREEK RESERVOIR
4105 OWYHEE
4106 OXBOW RESERVOIR
4107 SUTTLE LAKE
4108 WALDO LAKE
MEDIAN
TOTAL P
0.105 '
0.032
O.C17
0.010
0.028
0.010
0.034
0.070
0.062
0.024
0.013
0.016
0.017
0.079
0.028
0.068
0.038
0.095
0.071
0.031
0.005
MEDIAN
INORG N
0.080
0.060
0.040
0.080
0.075
0.040
0.050
0.070
0.130
0.080
0.060
0.050
0.045
0.560
0.040
0.640
0.060
.0.425
0.690
0.040
0.040
500-
MEAN SEC
463.800
415.067
380.348
401.866
366.286
243.500
391.778
o477.111
400.750
345.428
234.000
370.000
369.143
428.133
294.500
429.111
435.200
480.417
425.555
95.000
-100.000
MEAN
CHLORA
15.379
8.081
10.391
2.420
11.112
2.787
9.322
25.389
7.322
2.067
4.600
2.318
34.962
16.207
7.300
18.722
2.333
3.350
10.311
9.167
0.350
15-
MIN DO
14.700
14.800
12.200
7.400
14.800
11.800
12.800
14.600
14.700
12.800
9.600
13.600
8.200
14.500
6.800
12.400
7.400
13.200
12.200
6.800
6.800
MEUI/I
QISS OHTh
0.035
0.009
O.OOb
0.009
0.013
0.003
0.012
0.015
0.020
0.007
0.007
0.009
0.004
0.043
0.011
0.045
0.027
0.064
0.040
0.020
0.006
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PERCENT or LAKES WITH HIGHER VALUES (NUMBER OF LAKES WITH HIGHER VALUES)
LAKE
CODE LAKE NAME
1601 AMERICAN FALLS RESERVOIR
160? CASCADE LAKE
1603 LAKE COEUR D'ALENE
1604 DWORSHAK RESERVOIR
1605 HAUSER
1606 HAYOEN LAKE
1607 ISLAND PARK RESERVOIR
1608 LAKE LOWELL
1609 MAGIC RESERVOIR
1610 PALISADES RESERVOIR
i6ii LOWER PAYETTE
1612 LOWER TWIN LAKES
1613 UPPER TWIN LAKES
A101 BROWNLEE RESERVOIR
4102 DIAMOND LAKE
4103 HELLS CANYON RESERVOIR
4104 HILLS CREEK RESERVOIR
4105 OWYHEE
4106 OXBOW RESERVOIR
4107 SUTTLE LAKE
4108 WALDO LAKE
MEDIAN
TOTAL P
0 (
45 <
75 (
93 <
58 <
93 <
40 <
20 1
30 <
65 <
85 <
80 1
70 1
10 1
58 i
25
35
5 1
15
50
100
0)
9)
15)
18)
11)
18)
8)
4)
6)
13)
17)
16)
[ 14)
2)
1 11)
: 5)
I 7)
I 1)
: 3)
( 10)
( 20)
MEDIAN
INORG N
30 (
58 <
93 (
30 (
40 <
93 (
68 <
45 1
20 <
30 <
58 1
68 1
75
10
93
5
50
15
0
80
93
5)
11)
17)
5)
8)
17)
13)
1 9)
4)
5)
[ 11)
[ 13)
1 15)
( 2)
( 17)
t 1)
I 10)
! 3)
( 0)
( 16)
( 17)
500-
MEAN SEC
10
35
55
40
70
85
50
5
45
75
90
60
65
25
80
20
15
0
30
95
100
( 2)
( 7)
( 11)
( 8)
< 14)
( 17)
( 10)
( 1)
( 9)
( 15)
( 18)
( 12)
< 13)
( 5)
( 16)
< 4)
( 3)
( 0)
( 6)
( 19)
( 20)
MEAN
CHLORA
20
50
30
80
25
75
40
5
55
95
65
90
0
15
60
10
85
70
35
45
100
( 4)
( 10)
( 6)
( 16)
( 5)
( 15)
( 8)
( 1)
( 11)
( 19)
( 13)
( 18)
( 0)
( 3)
( 12)
( 2)
( 17)
( 14)
( 7)
( 9)
( 20)
15-
MIN DO
13 (
3 (
58 (
83 (
3 <
65 (
43 (
20 <
13 (
43 <
70 (
30 <
75 1
25 <
95 1
50
83 1
35 1
58
95
95
2)
0)
ID
16)
0)
13)
8)
4)
2)
8)
14)
6)
15)
5)
[ 18)
[ 10)
: i6>
' 7)
I ID
( 18)
( 18)
MEDIAN
DISS OhTHO P
20 C
65 (
90 (
65 (
45 (
100 (
50 (
40 (
30 (
80 (
75 (
65 (
95 (
10 (
55 (
5 (
25 (
. 0 <
15 (
35 (
85 (
4)
12)
18)
12)
9)
20)
10)
8)
6)
16)
15)
12)
19)
2)
11)
1)
5)
0)
3)
7)
17)
INOEX
NO
93
25b
401
391
241
511
291
1J5
193
368
4*3 .
393
380
95
441
lii
293
125
153
400
573
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LAKES RANKED BY INDEX NOS.
RANK LAKE CODE LAKE NAME
INDEX NO
1 4108 WALDO LAKE 573
2 1606 HAYOEN LAKE 511
3 1611 LOWER PAYETTE 443
4 4102 DIAMOND LAKE 441
5 1603 LAKE COEUR O'ALENE 401
6 4107 SUTTLE LAKE 400
7 1612 LOdER TWIN LAKES 393
8 1604 DtfORSHAK RESERVOIR 391
9 1610 PALISADES RESERVOIR 388
10 1613 UPPER TWIN LAKES 380
11 4104 HILLS CREEK RESERVblR 293
12 1607 ISLAND PARK RESERVOIR 291
13 1602 CASCADE LAKE 256
14 1605 HAUSER 241
15 1609 MAGIC RESERVOIR 193
16 4106 OXBOW RESERVOIR 153
17 1608 LAKE LOWELL 135
18 4105 OWYHEE 125
19 4103 HELLS CANYON RESERVOIR 115
20 4101 BROWNLEE RESERVOIR 95
21 1601 AMERICAN FALLS RESERVOIR 93
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APPENDIX B
CONVERSION FACTORS
-------
CONVERSION FACTORS
.Hectares x 2.471 = acres
Kilometers x 0.6214 = miles
Meters x 3.281 = feet
Cubic meters x 8.107 x 10 ~4 = acre/feet
Square kilometers x 0.3861 = square miles
Cubic meters/sec x 35.315 - cubic feet/sec
Centimeters x 0.3937 = inches
Kilograms x 2.205 = pounds
Kilograms/square kilometer x 5.711 = Ibs/square mile
-------
APPENDIX C
TRIBUTARY FLOW DATA
-------
LA*E CODE
TRIBUTARY FLO* INFORMATION FOR OREGON
HELLS CANYON RESERVOIR
08/11/76
TOTAL DRAINAGE AREA OF LAKE(SQ KM) 189846.9
SLM-DRAINAGE
TRIBUTARY AQEAISQ KM)
JAN
FEB
MAR
APR
MAY
NORMALIZED FLOWS(CMS)
JUN JUL AUG
SEP
OCT
NOV
DEC
MEAN
4103A1
4103A2
4103C1
410301
4103ZZ
189846.9
184810.9
102.8
595. 7
395.3
625.80
597. 49
0.85
11.50
1.19
756.06
713.58
0.85
11.67
1.42
716.42
676.77
2.27
15.77
1.93
758.89
716.42
2.55
15.86
2.21
673.94
634.30
5.66
29.53
6.80
656.95
620.14
5.66
26.87
3.96
342.63
336.97
1.98
5.01
1.93
319.98
325.64
0.71
1.19
0.57
396.44
396.44
0.57
1.36
0.45
447.41
447.41
0.71
1.97
0.57
453.07
444.57
0.71
3.60
0.57
521.03
501.21
0.71
6.14
0.62
553.95
532.66
1.94
10.86
1.85
SUMMARY
TOTAL DRAINAGE AREA OF LAKE = 189846.9
SUM OF SUB-DRAINAGE AREAS = 189804.7
TOTAL FLOW IN
TOTAL FLOW OUT
6586.74
6668.60
MEAN MONTHLY FLOWS AND DAILY FLOWS
TRIBUTARY MONTH YEAR
4103A1
MEAN FLOW DAY
FLOW DAY
FLOW DAY
FLOW
4103A2
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
74
74
74
75
75
75
75
75
75
75
75
75
74
74
74
75
75
75
75
75
75
75
75
75
501.203
498.376
532.357
639.961
773.050
993.921
1404.516
1489.466
849.505
436.079
348.297
464.396
501.208
495.545
523.862
614.476
719.248
877.822
1268.595
1347.882
733.406
413.426
328.475
444.574
20
23
14
4
" 9
9
13
17
7
9
28
19
23
14
4
9
9
13
17
7
9
28
419.089
501.208
376.614
639.961 25
552.178 22
1030.733
1274.258
1543.268
855.169
319.980
402.099
410.594
521.030
538.020
620.139 25
569.168 22
897.644
1155.327
82.119
744.733
311.485
430.416
665.446
991.090
614.476
894.812
-------
TRIBUTARY FLOW INFORMATION FOR OREGON
LAKE CODE 41G3 HELLS CANYON RESERVOIR
MEAN MONTHLY FLOaS AND DAILY FLOwS(CMS)
08/11/76
TRIBUTARY
4103C1
410301
MONTH YEAR
10
11
12
1
?
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
74
74
74
75
75
75
75
75
75
75
75
75
74
74
74
75
75
75
75
75
75
75
75
75
'MEAN FLOW DAY
FLOW DAY
0.425
0.311
0.255
0.227
0.510
1.416
1.699
3.681
4.531
2.407
0.708
0.368
1.812
2.520
2.633
3.030
6.400
16.820
16.395
28.317
32.564
11.072
2.265
1.642
20
23
14
4
9
9
13
17
7
9
28
20
23
14
3
9
9
13
17
7
9
28
0.396
0.340
0.283
0.283
0.396
2.124
1.557
4.814
5.663
0.510
0.283
1.727
2.747
2.690
2.549
4.474
27.269
15.404
42.192
43.891
1.557
1.218
25
22
25
22
FLOW DAY
0.283
0.453
FLOW
3.794
5.182
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STORET RETRIEVAL DATE 76/08/13
DATE
FROM
TO
75/04/08
75/08/04
75/09/15
TIME
OF
DAY
14
14
14
14
14
14
07
07
07
07
07
07
07
07
13
13
13
13
13
13
13
45
45
45
45
45
45
30
30
30
30
30
30
30
30
30
30
30
30
30
30
30
DEPTH
FEET
0000
0005
0015
0050
0100
0150
0000
0005
0015
0040
0070
0110
0135
0160
0000
0005
0018
0040
0075
0110
0145
00010
WATER
TEMP
CENT
6.6
6.8
6.7
6.6
6.6
6.6
22.9
22.5
22.5
21.6
20.1
20.8
20.8
18.1
22.2
22.3
22.0
21.8
21.2
21.1
21.0
410301
45 14 15.0 116 42 08.0 3
rt£LLS CANYON RE.SERV01K
41063 OREGON
130892
11EPALES
2111202
0155 FEET DEPTH CLASS
00300
DO
MG/L
14.6
14.4
14.6
14.4
14.6
10.2
6.4
9.0
6.6
6.2
5.8
4.4
2.6
7.2
7.2
7.8
7.4
5.6
5.0
4.6
00077 00094
TRANSP CNDUCTVY
SECCHl FIELD
INCHES M1CROMHO
26 241
235
236
239
237
239
96 245
260
269
257
255
253
248
240
115 407
410
410
410
405
408
396
00400
PH
SU
8.45
8.45
8.45
8.50
8.50
8.50
9.00
9.05
8.60
8.60
8.40
8.30
8.20
8.00
8.20
8.30
8.30
8.30
8.15
8.10
8.10
00410
T ALK
CAC03
MG/L
139
140
137
138
136
135
104
103
101
102
102
102
102
102
152
153
155
153
153
156
153
00610
NH3-N
TOTAL
MG/L
0.040
0.040
0.050
0.040
0.050
0.050
0.030
0.030
0.040
0.050
0.040
0.040
0.040
0.040
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00
00625
TOT KJEL
N
MG/L
0.300
0.200
0.200
0.400
0.300
0.400
0.400
0.300
0.300
0.300
0.300
0.200
0.200
0.200
0.200
0.200
0.300
0.200
0.200
0.200
0.200K
00630
N028.N03
N-TOTAL
MG/L
0.770
0.770
0.770
0.770
0.770
0.780
0.070
0.100
0.210
0.210
0.240
0.270
0.290
0.320
0.570
0.580
0.590
0.580
0.620
0.640
0.620
00671
PHOS-DIS
ORTHO
MG/L P
0.043
0.036
0.035
0.051
0.048
0.041
0.015
0.006
0.014
0.024
0.030
0.027
0.038
0.049
0.052
0.055
0.053
0.054
0.057
0.057
0.056
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/08/12
410301
45 14 15.0 116 42 08.0 3
HELLS CANYON RESERVOIR
41063 OREGON
130892
11EPALES
0155 FEET
DEPTH
2111202
CLASS 00
00665
DATE TIME DEPTH PHOS-TOT
FROM OF
TO DAY FEET MG/L P
75/04/Ofl
75/08/04
75/09/15
14 45
14 45
14 45
14 45
14 45
14 45
07 30
07 30
07 30
07 30
07 30
07 30
07 30
07 30
13 30
13 30
13 30
13 30
13 30
13 30
13 30
0000
0005
0015
0050
0100
0150
0000
0005
0015
0040
0070
0110
0135
0160
0000
0005
0018
0040
0075
0110
0145
0.086
0.092
O.OB8
0.088
0.090
0.093
0.030
0.029
0.036
0.038
0.043
0.046
0.050
0.061
0.078
0.068
0.065
0.065
0.068
0.070
0.076
32217 00031
CHLRPHYL INCDT LT
A REMNING
UG/L PERCENT
27.9
33.4
7.5
-------
STORET RETRIEVAL DATE 76/08/12
410302
45 07 35.0 116 44 42.0 3
HELLS CANYON HEStKVOlK
41063 OREGON
130892
DATE
FROM
TO
75/04/08
75/08/04
75/09/15
DATE
FROM
TO
75/04/08
75/08/04
75/09/15
TIME DEPTH
OF
DAY FEET
11 45 0000
11 45 0015
11 45 0026
08 10 0000
08 10 0005
08 10 0015
08 10 0035
08 10 0069
14 00 0000
14 00 0005
14 00 0015
14 00 0040
14 00 0070
14 00 0095
TIME DEPTH
OF
DAY FEET
11 45 0000
11 45 0015
11 45 0026
08 10 0000
08 10 0005
08 10 0015
08 10 0035
08 10 0069
14 00 0000
14 00 0005
14 00 0015
14 00 0040
14 00 0070
14 00 0095
00010
WATER
TEMP
CENT
6.8
6.8
7.0
23.4
23.4
22.9
21.0
20.6
21.8
21.7
21.3
21.2
21.1
21.1
00665
PHOS-TOT
MG/L P
0.087
0.079
0.084
0.033
0.031
0.034
0.036
0.044
0.069
0.073
0.073
0.067
0.075
0.076
00300 00077 00094
DO TRANSP CNDUCTVY
SECCHI FIELD
MG/L INCHES MICROMHO
14.6 29
14.6
13.4
10.4 72
11.2
10.0
7.2
6.8
5.8 72
5.8
5.6
5.0
5.2
4.8
32217 00031
CHLRPHYL INCDT LT
A REMNING
UG/L PERCENT
17.2
30.3
9.8
235
235
235
269
261
259
253
249
421
416
415
412
412
410
11EPALES 2111202
0030 FEET DEPTH CLASS 00
00400 00410 00610 00625 00630 00&71
PH T ALK NH3-N TOT KJEL N02&N03 PHOS-DIS
CAC03 TOTAL N N-TOTAL ORTHO
SU
8.
8.
8e
9.
9.
9.
8.
8.
8.
8c
8c
8.
8.
8.
K
MG/L
50
50
50
00
40
15
75
50
20
20
20
10
10
10
138
139
138
103
103
104
102
105
158
159
163
159
162
161
VALUE KNOWN TO
LESS THAN
MG/L
0.040
0.040
0.040
0.020
0.030
0.050
0.050
0.040
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
BE
MG/L
0.400
0.400
0.800
0.400
0.400
0.400
0.300
0.300
0.200
0.200
0.300
0.200
0.400
0.200K
MG/L
0.730
0.740
0.740
0.040
0.020K
0.030
0.160
0.270
0.680
0.680
0.680
0.680
0.680
0.680
MG/L P
0.050
0.033
0.049
0.008
0.014
0.006
0.020
0.023
0.060
0.063
0.067
0.066
0.063
0.062
INDICATED
-------
STORET RETRIEVAL DATE 76/08/12
410303
45 03 58.0 116 48 35.0 3
HELLS CANYON RESERVOIR
41001 OREGON
130891
DATE
FROM
TO
75/04/08
75/08/04
75/09/15
DATE
FROM
TO
75/04/08
75/08/04
75/09/15
TIME DEPTH
OF
DAY FEET
10 25 0000
10 25 0015
08 35 0000
08 35 0005
08 35 0015
08 35 0030
08 35 0051
14 25 0000
14 25 0005
14 25 0015
14 25 0030
14 25 0053
TIME DEPTH
OF
DAY FEET
10 25 0000
08 35 0000
08 35 0005
08 35 0015
08 35 0030
08 35 0051
14 25 0000
14 25 0005
14 25 0015
14 25 0030
14 25 0053
00010
WATER
TEMP
CENT
6.7
6.9
21.4
21.4
21.4
21.3
20.7
21.4
21.2
21.1
21.0
00665
PHOS-TOT
MG/L P
0.083
0.041
0.047
0.0<»4
0.044
0.042
0.074
0.071
0.076
0.080
0.080
00300
DO
•MG/L
14.4
7.0
7.2
7.4
6.8
7.2
5.4
5.5
5.4
5.0
5.0
32217
CriLRPHYL
A
UG/L
22.8
9.6
10.0
00077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES M1CROMHO
30 243
241
114 261
267
263
265
263
84 420
416
416
413
415
00031
INCDT LT
REMNING
PERCENT
11EPALES 2111202
0999 FEET DEPTH CLASS 00
00400 00410 00610 00625 00630
PH T ALK NH3-N TOT KJEL N02&N03
SU
8.
8.
. 8.
8.
8.
8.
8.
8.
8.
8.
8.
55
65
60
60
55
50
20
20
20
20
15
CAC03
MG/L
138
106
107
107
105
98
164
162
163
164
164
TOTAL
MG/L
0.040
0.020
0.030
0.030
0.020
0.030
0.020K
0.020K
0.020K
0.020K
0.020K
N N-TOTAL
MG/L
0.300
0.200
0.300
0.300
0.300
0.300
0.200
0.200
0.200
0.200
0.200K
MG/L
0.680
0.250
0.260
0.250
0.250
0.260
0.680
0.680
0.680
0.690
0.690
00671
PHOS-DIS
ORTHO
MG/L P
0.027
0.020
0.022
0.023
0.021
0.022
0.063
0.064
0.063
0.064
0.064
'
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
APPENDIX E
TRIBUTARY DATA
-------
STORET RETRIEVAL DATE 76/08/12
DATE TIME DEPTH N02&N03
FROM OF
TO DAY FEET
74/10/20
74/11/23
74/12/14
75/01/04
75/01/25
75/02/09
75/02/22
75/03/09
75/04/13
75/05/17
75/06/07
75/08/09
12 30
14 40
16 00
14 30
13 ??
13 50
15 00
13 30
13 15
13 15
14 40
4103A1
45 14 10.0 116 42 10.0 4
SNAKE RIVER
41 15 CUPRUM
0/HELLS CANYON RESERVOIR 130892
BELO HELLS CYN 0AM 10.5 MI N OF CUPRUM
11EPALES 2111204
0000 FEET DEPTH CLASS 00
0630
'&.N03
OTAL
iG/L
0.768
0.920
1.010
1.040
0.850
0.768
0.720
0.790
0.470
0.060
0.085
0.260
00625
TOT KJEL
N
MG/L
0.200
0.300
0.400
0.200
0.200
0.800
0.400
0.600
1.550
0.600
1.350
0.550
00610
NH3-N
TOTAL
MG/L
0.025
0.035
0.060
0.065
0.016
0.032
0.044
0.028
0.045
0.025
0.055
0.025
00671
PHOS-DIS
ORTHO
MG/L P
0.075
0.055
0.045
0.045
0.024
0.016
0.016
0.024
0.020
0.015
0.010
0.025
00665
PHOS-TOT
MG/L P
0.075
0.060
0.050
0.050
0.030
0.050
0.040
0.060
0.070
0.100
0.045
0.060
-------
STORET RETRIEVAL DATE 76/08/12
4103B1
45 08 30.0 116 43 30.0 4
KINNEY Cf\EEf\
41 15 CUPRUM
T/HELLS CANYON RESERVOIR 130892
PRVT PVD RD BRDG 6 MI S OF HELLS CYN DAM
11EPALES 2111204
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
74/10/20
74/11/23
74/12/14
75/01/04
75/01/25
75/02/09
75/02/22
75/03/09
75/04/13
75/05/17
75/06/07
75/08/09
75/C9/28
TIME 1
OF
DAY 1
11 50
14 10
15 30
13 30
12 55
13 23
14 20
13 00
12 30
13 45
14 10
11 25
FEET
00630
N02kN03
N-TOTAL
MG/L
0.216
0.248
0.280
0.296
0.336
0.320
0.376
0.276
0.270
0.130
0.105
0.210
0.230
00625
TOT KJEL
N
MG/L
0.100K
0.100K
0.100
0.400
0.550
0.450
0.200
0.400
0.662
0.300
0.750
0.400
0.800
00610
NH3-N
TOTAL
MG/L
0.040
0.015
0.010
0.024
0.008
0.012
0.012
0.040
0.020
0.025
0.030
0.010
00671
PHOS-DIS
ORTHO
MG/L P
0.020
0.015
0.020
0.015
0.010
0.024
0.024
0.024
0.020
0.025
0.015
0.110
0.015
00665
PHOS-TOT
MG/L P
0.020
0.015
0.030
0.030
0.021
0.030
0.024
0.030
0.020
0.060
0.100
0.140
0.030
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STOrtET RETRIEVAL DATE 76/08/12
4103A2
44 08 10.0 116 50 15.0 4
SNAKE RIVER
41 15 COPPERFIELD
T/HELLS CANYON RESERVOIR 130791
BELO OXBOX DAM 1 MI SE OF COPPERFIELD
11EPALES 2111304
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
74/10/19
74/12/14
75/01/04
75/04/13
TIME DEPTH
OF
DAY
13
14
12
11
FEET
30
00
05
35
00630
N02&N03
N-TOTAL
MG/L
0.
0.
0.
0.
800
960
980
510
00625
TOT KJEL
N
MG/L
0.
0.
i.
i.
500
300
400
200
00610
NH3-N
TOTAL
MG/L
0.040
0.060
0.080
0.035
00671 00665
PMOS-DIS PHOS-TOT
ORTHO
MG/L ~ "" " ~
0.
0.
0.
0.
p
065
045
045
020
MG/L f
0
0
0
0
.075
.050
.050
.070
-------
STORE! RETRIEVAL DATE 76/08/12
DATE TIME DEPTH
FROM OF
TO DAY FEET
74/10/20 15 30
74/11/23 13 00
74/12/14 14 00
75/01/04 12 55
75/01/25
75/02/09 12 00
75/02/22 13 30
75/04/13 11 45
75/06/07 13 30
4103C1
44, 09 15.0 116 49 50.0 4
INDIAN CRF.FK
41 15 COPPERFIELD
T/HELLS CANYON RESERVOIR 130791
PRVT PVD RD BROG 1.5 MI N OF OXBOW DArt
11EPALES 2111204
0000 FEET DEPTH CLASS 00
0630
!S.N03
OTAL
IG/L
0.048
0.056
0.112
0.590
1.060
0.272
0.392
1.100
0.460
00625
TOT KJEL
N
MG/L
0.400
0.500
0.400
1.700
0.600
0.100
0.100
1.450
0.400
00610
NH3-N
TOTAL
MG/L
0.010
0.050
0.010
0.015
0.024
0.040
0.016
0.025
0.005
00671
PHOS-OIS
ORTHO
MG/L P
0.010
0.010
0.010
0.019
0.016
0.016
0.024
0.035
0.025
00665
PHOS-TOT
MG/L P
0.010
0.010
0.010
0.020
0.016
0.020
0.030
0.100
0.050
-------
STORET RETRIEVAL DATE 76/08/12
DATE TIME DEPTH N02&.N03
FROM OF
TO DAY FEET
74/11/33
74/12/1^
75/01/03
75/01/25
75/02/09
75/02/22
75/03/09
75/04/13
75/05/17
75/06/07
75/08/09
75/09/28
11
12
10
10
10
11
10
09
14
11
30
00
00
00
00
00
50
35
15
00
410301
44 57 21.0 116 52 15.0 4
PINE CREEK
41 15 COPPERFIELD
T/HELLS CANYON RESERVOIR 130892
GAGING STATN 1.8 MI S OF COPPERFIELO
11EPALES 2111204
0000 FEET DEPTH CLASS 00
0630
&.N03
OTAL
G/L
0.048
0.104
0.192
0.320
0.552
0.704
0.870
0.520
0.125
0.115
0.025
0.015
00625
TOT KJEL
N
MG/L
1.100
0.300
0.700
0.200
0.500
0.700
1.000
2.400
0.300
0.500
0.650
0.600
00610
NH3-N
TOTAL
MG/L
0.050
0.010
0.030
0.016
0*056
0.016
0.008
0.085
0.035
0.015
0.020
0.010
00671
PHOS-DIS
ORTHO
MG/L P
0.010
0.015
0.022
0.016
0.024
0.024
0.048
0.020
0.020
0.015
0.020
0.005K
00665
PHOS-TOT
MG/L P
0.020
0.020
0.040
0.020
0.050
0.035
0.180
0.060
0.140
0.120
0.050
0.030
K VALUE KNOlrfN TO BE
LESS THAN INDICATED
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