U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
HILLS CREEK RESEfMHR
LANEOMY
OREGON
EPA REGION X
WORKING PAPER No, 830
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
-------
REPORT
ON
HILLS CREEK RESERVOIR
LANE COUNTY
OREGON
EPA REGION X
WORKING PAPER No, 830
WITH THE COOPERATION OF THE
OREGON DEPARTMENT OF ENVIRONMENTAL QUALITY
AND THE
OREGON NATIONAL GUARD
JANUARY, 1978
-------
1
CONTENTS
Page
Foreword i i
List of Oregon Lakes and Reservoirs iv
Lake or Reservoir Drainage Area Map v
Sections
I. Conclusions 1
II. Drainage Basin Characteristics 3
III. Hater Quality Summary 4
IV. Nutrient Loadings 8
V. Literature Reviewed 12
VI. Appendices 13
-------
11
FOREWORD
The National Eutrophication Survey was initiated in 1972 in
response to an Administration commitment to investigate the nation-
wide threat of accelerated eutrophication to freshwater lakes and
reservoirs.
OBJECTIVES
The Survey was designed to develop, in conjunction with state
environmental agencies, information on nutrient sources, concentrations,
and impact on selected freshwater lakes as a basis for formulating
comprehensive and coordinated national, regional, and state management
practices relating to point-source discharge reduction arid 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.
LM.jMLYS.IS
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 [S303(e)j, water
quality criteria/standards review [§303(c)], clean lakos [§314(a,b)L
and water quality monitoring [§106 and §3Ub(b)'J activities mandated
by the Federal Water Pollution Control Act Amendments of 1972.
-------
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.
ACKNQWLEDMENT
The staff of the National Eutrophication Survey (Office of
Research & Development, U. S. Environmental Protection Agency)
expresses sincere appreciation to the Oregon Department of Environ-
mental Quality for the professional involvement and to the Oregon
National Guard for conducting the tributary sampling phase of the
the Survey.
William H. Young, Department Director, and Harold L. Sawyer,
Administrator, and the staff of the Water Quality Control Division
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
c'irected the volunteer efforts of the Oregon National Guardsmen,
are also gratefully acknowledged for their assistance to the
Survey.
-------
IV
NAME
Brown!ec
Diamond
Hells Canyon
Hills Creek
Owyhee
Oxbow
Suttlc
Wai do
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES and RESERVOIRS
STATE OF OREGON
COUNH
Baker, OR; Washington, ID
Douglas
Baker, Wai Iowa, OR; Adams,
Idaho, ID
Lane
Malhuer
Baker, OR; Adams, ID
Jefferson
Lane
-------
HILLS CREEK RESERVOIR
® Tributary Sampling Site
X Lake Sampling Site
^7 Drainage Area Boundary
15
2p Km.
4345'—
4330—
-------
HILLS CREEK RESERVOIR
STORE! NO. 4104
I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate Hills Creek Reservoir is eutrophic.
It ranked fourth in overall trophic quality when the eight
Oregon lakes and reservoirs sampled in 1975 were compared
using a combination of six parameters*. Three of the water
bodies had less median total phosphorus, dissolved orthophos-
phorus, and inorganic nitrogen; one had less mean chlorophyll a^,
and all but one of the other water bodies had greater mean
Secchi disc transparency.
Survey limnologists did not observe surface concentrations
of algae, but summer blooms of blue-green algae (Anabaena sp.)
have been reported (Larson, 1974).
B. Rate-Limiting Nutrient:
Because of significant changes in nutrients in the sample
between the time of collection and the beginning of the algal
assay, the results are not considered representative of conditions
in the reservoir at the time the sample was collected (10/30/75).
The reservoir data indicate nitrogen limitation all three
sampling times. However, because of turbidity (Klingeman et al.,
1971), primary productivity probably is light-limited.
C. Nutrient Controllability:
1. Point sources—No known municipal or industrial point
sources impacted the reservoir during the sampling year. Septic
* See Appendix A.
-------
2
tanks serving lakeshore dwellings were estimated to have con-
tributed less than 0.1% of the total phosphorus load, but a
shoreline survey is needed to determine the significance of
those sources.
The present phosphorus loading of 3.66 g/m2/yr is more than
twice that proposed by Vollenweider (Vollenweider and Dillon,
1974) as a eutrophic loading (see page 11). Though the high
turbidity of the reservoir may be suppressing primary production,
•
every effort should be made to minimize phosphorus inputs to
slow the aging of the reservoir.
2. Non-point sources--Non-point sources, including direct
precipitation, added over 99.9% of the total phosphorus load
during the sampling year. The Middle Fork Willamette River
added 70.9% of the total load; Hills Creek, 10.9%; and the un-
gaged tributaries contributed an estimated 17.7%.
The phosphorus export rate of Middle Fork Willamette River
and Hills Creek were 43 and 32 kg/km2/yr (see page 10). These
export rates are considerably higher than those of unimpacted
forested watersheds in the eastern United States (Omernik, 1976).
The higher rates may be due to unstable soil materials in the
watersheds (Klingeman et al., op. cit.).
-------
II. RESERVOIR AND DRAINAGE BASIN CHARACTERISTICS'1"
A. Morphemetry :
1. Surface area: 11.07 kilometers2.
2o Mean depth: 39.2 meters.
3. Maximum depth: 90.5 meters.
4. Volume: 433.571 x 106 m3.
5. Mean hydraulic retention time: 152 days.
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Drainage Mean flow
Name area (km2)* (m3/sec)*
Middle Fork Willamette River 668.2 22.37
Hills Creek 136.5 4.31
Minor tributaries &
immediate drainage - 191.7 6.36
Totals 996.4 33.04**
2. Outlet -
Middle Fork Willamette River 1,007.5*** 33.04
C. Precipitation****:
1. Year of sampling: 123.4 centimeters.
2, Mean annual: 117.0 centimeters.
t Table of metric conversions—Appendix B.
ft Anonymous, 1972; Martin and Hanson, 1966.
* For limits of accuracy, see Working Paper No. 175, "...Survey Methods,
1973-1976".
** Sum of inflows adjusted to equal outflow.
*** Includes area of reservoir.
**** See Working Paper No. 175.
-------
- 4
III. WATER QUALITY SUMMARY
Hills Creek 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 a number of depths at two stations on the reservoir (see map, page
v). During each visit, a single depth-integrated (4.6 m to surface)
sample was composited from the stations for phytoplankton identifi-
cation and enumeration; and during the last visit, a single 18.9-liter
depth-integrated sample was composited for algal assays. Also each time,
a depth-integrated sample was collected from each of the stations for
chlorophyll a_ analysis. The maximum depths sampled were 67.1 meters
at station 1 and 54.9 meters at station 2.
The sampling results are presented in full in Appendix D and are
summarized in the following table.
-------
•ARAMETER
IEMP (C)
JISS OXY (MG/L)
JNDCTVY (MCSOMO)
'H (STAND UNITS)
TOT ALK (MG/L)
IOT P (MG/L)
1RTHO P (MG/L)
^02+N03 (MG/L)
AMMONIA (MG/L)
iJEL N (MG/L)
INORG N (MG/L)
TOTAL N (MG/L)
CHLR^YL A (UG/L)
5ECCHI (METERS)
A. SUMMARY OF °riYSICAL AND
1ST SAMPLING ( 3/28/75)
? SITES
KANGE MEAN MEDIAN
4.5 - 6.2 5.6 5.b
SO.'* - 11.(S 11.3 11.b
32. - 48. nO. 40.
7.' - 7.8 7.5 7.t
?0. - 33. 22. 22.
0.03f - 0.059 0.044 0.043
a.030 - 0.041 0.035 0.034
0.020 - 0.040 0.03? 0.02U
3.020 - 0.040 0.024 0.020
J.?00 - 0.400 0.217 0.200
'•.t)«
-------
B. Biological characteristics:
1. Phytoplankton -
Sampling
Date
03/28/75
07/16/75
10/30/75
Domi nant
Genera
1.
2.
1.
2.
3.
4.
1.
2.
3.
4.
5.
Chroomonas (?) s£.
Cryptomonas sp.
Total
Fragilaria s£.
Cryptomonas sp.
Asterionella sp.
Chroomonas (?) sp.
Total
Melosira sp.
Asterionella sp.
Fragilaria sp.
Chlamydoriionas sp.
Centric diatoms
Other genera
Algal Units
per ml
219
17
236
1,569
297
212
42
2,120
4,118
223
148
111
111
75
2. Chlorophyll a^ -
Sampling
Date
03/28/75
07/16/75
10/30/75
Total
Station
Number
1
2
1
2
1
2
4,786
Chlorophyll a
(ug/D
0.6
1.0
3.8
4.2
2.7
1.7
-------
7
C. Limiting Nutrient Study:
Due to significant changes in the nutrients in the sample from
the time of collection to the beginning of the assay, the results
are not considered representative of conditions in the reservoir
when the sample was taken (10/30/75).
The reservoir data indicate nitrogen limitation all three sam-
pling times. The mean inorganic nitrogen to orthophosphorus ratios
were 1 to 1 in April, 3 to 1 in July, and 3 to 1 in October; and
nitrogen limitation would be expected.
-------
8
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 tributary
sites nearest the reservoir.
In this report, nutrient loads for sampled 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 esti-
mated using the means of the nutrient loads, in kg/km2/year, at stations
A-2 and D-l and multiplying the means by the ZZ area in km2.
No known wastewater treatment plants impacted Hills Creek Reservoir
during the sampling year.
Working Paper No. 175.
-------
9
A. Waste Sources:
1. Known municipal - None
2. Known industrial - None
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
kg P/ % of
Source j^r total
a. Tributaries (non-point load) -
Middle Fk. Willamette River 28,760 70.9
Hills Creek 4,395 10.9
b. Minor tributaries & immediate
drainage (non-point load) - 7,190 17.7
c. Known municipal STP's - None
d. Septic tanks <5 <0.1
e. Known industrial - None
f. Direct precipitation** - 195 0.5
Total 40,540 100.0
2. Outputs -
Reservoir outlet - Middle Fk
Willamette R. 36,130
3. Net annual P accumulation - 4,410 kg.
* Estimate based on three shoreline dwellings; see Working Paper No. 175.
** See Working Paper No. 175.
-------
10
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
kg N/ % of
Source yr total
a. Tributaries (non-point load) -
Middle Fk Willamette River 119,655 59.4
Hills Creek 30,910 15.4
b. Minor tributaries & immediate
drainage (non-point load) - 38,820 19.3
c. Known municipal STP's - None
d. Septic tanks* - 30 <0.1
e. Known industrial - None
f. Direct precipitation** - 11.950 5.9
Total 201,365 100.0
2. Outputs -
Reservoir outlet - Middle Fk
Willamette R. 256,375
3. Net annual N loss - 55,010 kg.
D. Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr kg N/km2/yr
Middle Fk, Willamette R. 43 179
Hills Creek 32 226
E. Mean Nutrient Concentrations in Ungaged Streams:
Mean Total P Mean Total N
Tributary Cone, (rng/1) Cone, (mg/1)
Buck Creek 0.041 0.230
Coffeepot Creek 0.050 0.274
* Estimate based on three shoreline dwellings; see Working Paper No. 175.
** See Working Paper No. 175.
-------
11
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 Vollenweider1s model may not be applicable to
water bodies with short hydraulic retention times.
Total Phosphorus Total Nitrogen
Total Accumulated Total Accumulated
grams/m2/yr 3.66 0.40 18.2 loss*
Vollenweider phosphorus loadings
(g/m2/yr) based on mean depth and mean
hydraulic retention time of Hills Creek Reservoir:
"Dangerous" (eutrophic loading) 1.80
"Permissible" (oligotrophic loading) 0.90
* There was an apparent loss of nitrogen during the sampling year. This
may have been due to nitrogen fixation in the reservoir, solubilization
of previously sedimented nitrogen, recharge with nitrogen-rich ground water,
or unsampled point sources discharging directly to the reservoir. What-
ever the cause, a similar nitrogen loss has occurred at Shagawa Lake, Minne-
sota, which has been intensively studied by EPA's former National Eutro-
phication and Lake Restoration Branch (Malueg et al., 1975).
-------
12
V. LITERATURE REVIEWED
Anonymous, 1972. Water resources data for Oregon. U.S. Geol.
Surv., Salem.
Klingeman, P. C., C. T. Youngberg, H. K. Phinney, D. W. Larson,
J. R. Bell, M. E. Harward, 6. H. Simonson, and D. Rai; 1971.
Hills Creek Reservoir turbidity study. Rept. #14, Water Re-
sources Res. Inst., OSU, Corvallis.
Larson, Douglas W., 1974. Upstream reservoirs as important sources
of planktonic algae and nutrients influencing the eutrophication
of lower impoundments in the Willamette River basin, Oregon. OR
Dept. Envir. Quality, Portland.
Malueg, Kenneth W., D. Phillips Larsen, Donald W. Schults, and
Howard T. Mercier; 1975. A six-year water, phosphorus, and
nitrogen budget for Shagawa Lake, Minnesota. Jour. Environ.
Qua!., vol. 4, no. 2, pp. 236-242.
Martin, R. 0. R. and Ronald L. Hanson, 1966. Reservoirs in the
United States. Water Supply Paper No. 1838, U.S. Geol. Surv.,
Wash., DC.
Omernik, James M., 1976. The influence of land use on stream nutrient
levels. Ecol. Res. Ser. EPA-600/3-76-014, Corvallis.
Scheidt, Ron C. Personal communication (lakeshore dwellings). Water
Resources Res. Inst., OSU, Corvallis.
-------
VI. APPENDICES
13
APPENDIX A
LAKE RANKINGS
-------
LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
4101 8ROWNLEE RESERVOIR
4102 DIAMOND LAKE
4103 HELLS CANYON RESERVOIR
4104 HILLS CREEK RESERVOIR
4105 OWYHEE
4106 OXBO»I RESERVOIR
4107 SUTTLE LAKE
4108 WALDO LAKE
MEDIAN
TOTAL P
0.079
0.028
0.068
0.038
0.095
0.071
0.031
0.005
MEDIAN
INORG N
0.560
0.040
0.640
0.060
0.425
0.690
0.040
0.040
500-
MEAN SEC
428.133
294.500
429.111
435.200
480.417
425.555
95.000
-100.000
MEAN
CHLORA
16.207
7.300
18.722
2.333
3.350
10.311
9.167
0.350
15-
MIN DO
14.500
6.800
12.400
7.400
13.200
12.200
6.800
6.800
MED I,
DISS ORTi
0.043
0,011
0.045
0.027
0.064
0.040
0.020
0.006
-------
PERCENT OF LAKES WITH HIGHER: VALUES (NUMBER OF LAKES WITH HIGHER VALUES)
LAKE
CODE LAKE NAME
4101 flROWNLEE RESERVOIR
4102 DIAMOND LAKE
4103 HELLS CANYON RESERVOIR
4104 HILLS CREEK RESERVOIR
4105 OWYHEE
4106 OXBOW RESERVOIR
4107 SUTTLE LAKE
4103 WALDO LAKE
MEDIAN
TOTAL P
14 (
86 (
A3 (
57 <
0 (
29 (
71 (
100 (
1)
6)
3)
4)
0)
2)
5)
7)
MEDIAN
INOSG N
29 (
93 (
14 (
57 (
43 (
0 (
71 (
93 (
2)
6)
1)
4)
3)
0)
5)
6)
500-
MEAN SEC
43 (
71 (
29 (
14 (
0 (
57 (
86 (
100 (
3)
5)
2)
1)
0)
4)
6)
7)
MEAN
CHLORA
14 <
57 (
0 (
86 (
71 (
29 (
43 (
100 (
1)
4)
0)
6>
5)
2)
3)
7)
15-
MIN
0 (
86 (
29 (
57 (
14 (
43 (
86 (
86 (
DO
0)
5)
2)
4)
1)
3)
5)
5)
MEDIAN
DISS OSTHO P
29 C
86 (
14 (
57 (
0 (
43 (
71 (
100 (
2)
6)
1)
4)
0)
3)
5)
7)
INC
NO
li
47
12
32
12
20
42
57
-------
LAKES RANKED BY INDEX NOS.
LAKE CODE LAKE NAME INDEX NO
1 4108 WALDO LAKE 579
2 4102 DIAMOND LAKE 479
3 4107 SUTTLE LAKE 428
4 4104 HILLS CREEK RESERVOIR 323
5 4106 OXBOW RESERVOIR 201
6 4101 BROte'NLEE RESERVOIR 129
7 4103 HELLS CANYON RESERVOIR 129
3 4105 OWYHEE
-------
APPENDIX B
CONVERSION FACTORS
-------
CONVERSION FACTORS
Hectares x 2.471 * acres
Kilometers x 0.6214 = miles
•Heters x 3.281 = feet
-4
Cubic meters x 8.107 x 10 « acre/feet
Square kilometers x 0.3861 = square miles
£ub1c meters/sec x 35.315 - cubic feet/sec
Centimeters x 0.3937 » inches
"IC'ttograms x 2.205 * pounds
kilograms/square kilometer x 5.711 * Ibs/square mill
-------
APPENDIX C
TRIBUTARY FLOW DATA
-------
LAKE CODE
TRIBUTARY FLOW INFORMATION FOR OREGON
KILLS CREEK RESERVOIR
03/11/76
TOTAL DRAINAGE AREA OF LAKECSO KM) 1007.5
SUB-DRAINAGE
T-
-------
FLCN INFORMATION FOX OREGON
08/11/76
LAKE COOt <» 104 "ILLS CREEK RESERVOIR
MEAN MOlMTriLY FLO*S AND UAILY FLOWS (CMS)
TRIBJT4RY
410401
41041I-'
41041G
10
11
12
1
?
3
4
5
6
7
8
9
10
11
12
1
2
3
t
5
f>
7
8
9
10
11
12
1
?
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
74
74
74
75
75
75
75
75
75
75
75
75
MEAN FLO* OAY
FLOW DAY
FLO* OAY
FLO*
0.703
1.5C1
5.975
9.453
8.778
5.097
3.285
9.061
6.654
1.982
0.623
0.340
0.0
0.014
0.042
0.142
0.850
0.057
0.014
0.003
O.OG6
0.014
0.0
0.0
0.0
0.028
0.085
0.340
1.982
0.142
0.02*
0.020
0.011
0.023
0.0
0.0
19
15
16
6
7
7
22
21
10
28
29
16
19
15
16
6
7
7
18
27
10
24
22
12
19
15
16
6
7
7
18
21
10
24
22
12
0.566
0.566
13.847
13.762 17
3.823 24
4.531
3.0C2
5.862 28
7.447
0.793
0.595
0.340
0.0
0.0
0.038
1.133 17
0.566 21
0.014
0.006
O.OC3
0.006
0.006
0.0
0.0
0.0
O.OC8
0.057
2.265 17
1.557 21
0.037
0.017
C.008 27
O.Olt
0.011 28
0.0
0.0
12.205
7.362
7.900
0.014
2.265
0.051
5.663
0.008
0.006
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STORE! RETRIEVAL DATE 70/03/12
DATE
FROM
TO
75/03/28
75/07/16
75/10/30
TIME
OF
DAY
09 40
09 40
09 40
09 <*0
09 &0
09 40
14 50
14 50
14 50
14 50
14 50
14 50
14 50
13 40
13 40
13 40
13 40
13 40
13 40
13 40
DEPTrt
FEET
0000
0005
0015
0050
0100
0140
COOO
0005
0015
0040
0100
0150
0220
0000
0005
0018
0050
0080
0125
0170
00010
WATER
TEMP
CENT
6.2
6.1
6.1
5.7
5.1
5.1
18.5
18.9
18.2
13.2
6.6
3.8
3.0
13.9
14.0
13.9
11.3
7.9
6.0
5.7
410401
43 /»2 23.0 122 25 20.0 3
HILLS CREEK RESERVOIR
41039 OREGON
130991
iiEPALES 2111202
0159 FEET DEPTH CLASS
00300
DO
MG/L
11.6
11.6
11.6
11.4
11.4
10.8
9.0
9.0
8.2
10.6
10.0
15.4
9.0
9.6
9.0
9.0
8.2
8.2
9.0
8.4
00077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES MICROMHO
54 47
46
46
46
47
48
78 41
36
34
27
24
24
28
60 38
48
49
23
38
35
34
00400
PH
su
7.80
7.70
7.60
7.50
7.50
7.40
8.40
9.20
8.25
8.70
8.90
8.60
7.90
7.90
7.70
7.50
7.35
7.20
7.10
7.05
00410
T ALK
CAC03
MG/L
22
22
23
22
22
23
25
22
24
25
26
30
28
30
33
30
28
29
30
33
00610
NH3-N
TOTAL
MG/L
0.030
0.020
0.020
0.020
0.020
0.020
0.050
0.040
0.060
0.050
0.030
0.030
0.030
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00
00625
TOT KJEL
N
MG/L
0.200K
0.200K
0.200K
0.200K
0.2COK
0.200K
0.400
0.300
0.300
0.300
0.200K
0.200
0.200
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
00630
N02&N03
N-TOTAL
MG/L
0.020
0.020K
0.020
0.020
0.020
0.030
0.030
0.020K
0.020K
0.020K
0.020K
0.040
0.050
0.020
0.020K
0.020K
0.040
0.060
0.060
0.080
00671
PHOS-DIS
ORTHO
MG/L P
0.040
0.032
0.032
0.032
0.040
0.040
0.012J
0.013J
0.015J
0.026
0.030K
0.035J
0.029J
0.007
0.008
0.012
0.022
0.027
0.028
0.027
K.» VALUK KMOWN TO tf*. LESS
THAN INDICATED
J» VALUT KNOWN TO BE IN ERrtOrt
-------
STORET RETRIEVAL DATE ?6/3fi/-2
DATE
FROM
TO
75/07/lfc
75/10/30
43 42 23.0 122 25 ,?0.0 2
HILLS CRESK RESERVOIR
41C39 OREGON
130991
UEPALES 2111202
0159 FEET DEPTH CLASS 00
00665 32217 00031
TIME DEPTH PHOS-TOT CHLRPHYL INCDT LT
OF A REMNING
DAY FEET
09
U9
09
09
09
09
14
14
14
14
14
14
14
13
13
13
13
13
13
13
40
40
40
40
40
40
50
50
50
50
50
50
50
40
40
40
40
40
40
40
0000
0005
0015
0050
0100
0140
0000
0005
0015
0040
0100
0150
0220
0000
0005
0013
0050
0080
0125
OJ70
MG/L
0,
n,
0.
0.
c.
0.
0.
0,
0,
0,
0,
0.
0.
0,
0,
0,
0.
0,
0,
0,
. p
.044
,039
.038
.038
,040
,059
.017
.018
.020
.023
.029
.040
,041
.022
.022
.029
.034
.041
.041
.043
'JG/L PERCENT
0.6
3.8
2.7
-------
STOREY RETRIEVAL DATE
DATE
FROM
TO
75/03/2H
75/07/16
75/10/30
TIN"
OF
DAY
10
10
10
10
10
10
14
14
14
14
14
14
14
14
14
14
14
14
14
E
00
00
00
00
00
00
15
15
15
15
15
15
15
?0
20
20
20
20
20
DEPTH
FEET
0000
0005
0015
0050
0100
0156
0000
0005
0015
0040
0090
0140
0180
0000
0005
0018
0050
0080
0122
00010
WATER
TEMP
CENT
6.0
6.0
6.0
5.1
4.d
4.5
19.2
19.5
19.1
13.1
8.6
3.7
3.0
13.9
13.9
13.9
12.3
8.2
6.3
00300
DO
MG/L
11.4
11.6
11.6
11.6
11.2
10.4
9.0
9.6
9.0
8.8
9.6
9.6
13.4
9.8
9.2
9.0
9.4
7.6
7.8
00077
TRANSP CNDUC
SECCHI FIELD
INCHES KICWO
60
72
•'*3 39 52 = 0 422 25 28.0
HILLS CREEK RESERVOIR
OREGON
130991
11EPALES 2U1202
0160 FEET DEPTH CLASS 00
(4
VY
!HO
33
33
32
32
33
34
16
41
33
29
20
28
15
49
50
50
47
40
38
00400
PM
SU
7.50
7.40
7.40
7.40
7.30
7.20
9.30
8.90
7.90
7.50
7.20
7.00
6.95
7.00
7.25
7.20
7.20
6.90
6.90
00410
T ALK
CAC03
MG/L
21
20
20
21
21
22
29
19
21
22
25
25
27
32
32
31
31
33
33
00610
NSH3-N
TOTAL
MG/L
0.040
0.020
0.020K
0.030
0.020
0.030
0.090
0.050
0.070
0.080
0.040
0.030
0.030
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00625
TOT KJEL
N
MG/L
0.400
0.200
0.200K
0.200K
0.200K
0.200
1.200
0.300
0.200
0.300
0.200K
0.200K
0.200K
0.200K
0.200
0.200K
0.200
0.200
0.200
00630
N02&N03
N-TOTAL
MG/L
0.030
0.020K
0.02UK
0.020K
0.020K
0.040
o.oao
0.020
0.020K
0.030
0.040
0.040
0.040
0.030
0.020K
0.020K
0.020K
0.080
0.030
00671
PHOS-UIS
ORTHO
MG/L P
0.039
0.033
0.041
0.035
0.030
0.031
0.025J
0.015J
0.020J
0.026K
0.036J
0.038J
0.029J
0.010
0.013
0.014
0.016
0.027
0.014
VALUc KNOWN TO RE LESS
INDICATED
J» VALU? KNOWN TO *}£ I "I ERROR
-------
STORET RETRIEVAL DATE 76/06/12
410402
03 39 52.0 122 25 28.0 3
HILLS CREEK RESERVOIR
41039 OREGON
130991
11EPALES
0160 FEET
DEPTH
2111202
CLASS 00
00665
DATE TIME DEPTH PHOS-TOT
FROM OF
TO DAY FEET MG/L p
75/03/28
75/07/16
75/10/30
10
10
10
10
10
10
14
14
14
14
14
14
14
14
14
14
14
14
14
00
00
00
00
09
00
15
15
15
15
15
15
15
20
20
20
?0
20
20
0000
0005
0015
0050
0100
0156
0000
0005
0015
0040
0090
0140
0180
0000
0005
0018
0050
0080
0122
g
0
0
c
0
ft
0
0
Q
0
C
0
0
0
0
0
0
0
0
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
063
043
04?
0<*4
0<*7
0^6
030
020
020
C22
038
039
045
023
025
026
031
045
.061
32217
CHLRPHYL
A
OG/L
1.0
4.2
00031
INCOT LT
REHNING
PERCENT
1.7
-------
APPENDIX E
TRIBUTARY DATA
-------
STORE! RETRIEVAL DATE 76/08/12
42 40«,G 122 35 35..S 4
FORK KJILL/VMETTE RIV
41 15 OAKRID6E
0/HILLS CREEK RESERVOIR 130991
BELO HILL CRK DAM 2®8 Ml SE OF OAiXRIDGE
11EPALES 2U1204
FEET DEPTH CLASS 00
DATE
FROM
TO
74/10/19
74/11/15
74/12/16
75/01/06
75/01/17
75/02/07
75/03/07
75/04/22
TIHE DEPTH
OF
DAY FEET
10 30
10 18
11 35
14 10
13 ??
10 32
12 20
10 55
00630
N02&M03
N-TOTAL
MG/L
Os, 040
0,016
0.624
0.048
0,656
0.045
0.015
0.005
00625
TOT SUEL
N
MG/L
OB A At**
u lOOlN
0.700
CU2QQ
0.1GOK
Oe&OOK
0.150
OeOSOK
0.400
0061®
NH3°N
TOTAL
MG/L
It „ Q 11 fl
y o v ji v
6® 025
QeC25
©»®©5
Oni jft o
oOOB
0/4 ^ifa
eUCU
®.@08
0^029
00671
PMOS-DIS
ORTKO
HG/L P
00010
©c®05
Orfl « C
o^ AD
0*>025
Ofb'&7>
® V^vC
OftAff^
. y ^vwl
0.032
0»030
06665
PHOS-TOT
MG/L P
0.015
0.920
0.030
0.650
OoOSO
0.040
0.040
0.030
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STOKEY RETRIEVAL DATE 76/03/12
63 35 25oO 122 26 35.0 4
f-'ID FORK WILLAMETTE
4J 15 OAKRIDGE
T/HILLS CREEK RESErtVOIf* U0991
tti\ NEAR 3IGDCN RD B04 MI S HILs. CRK DAM
iitHALtb kill 1204
00CO FEE7 DEPTH CLASS 00
DATE
FROM
TO
74/10/19
74/12/1&
75/01/06
75/01/17
75/02/07
75/02/24
75/03/07
75/34/22
75/05/21
75/06/10
75/07/28
75/09/16
TIh£ DEPTH
OF
DAY FEET
12 45
13 30
H 41
12 50
11 15
11 03
10 48
10 25
10 35
12 30
11 00
15 15
00630
N026.N03
N-TOTAL
HG/L
0.616
0. 024
0.008
0.903
0.003
0.008
O.S06
0.015
0.005
0.005
0.005
0.010
00625
TOT KJEL
N
XG/L
0.100K
GoHOO
0.200
0.300
C.100K
0.100
G.100K
0.450
0.050K
0.050K
0.100
0.203
00610
NH3-=M
TOTAL
MG/L
0,010
0.025
0.020
C.016
0.024
0.008
0.008
0.020
0.010
0.005
0.010
0.005K
00671
PHOS-OIS
ORTHO
MG/L P
0.040
0«G30
0.050
0.032
0.040
0.032
0.024
0.030
0.020
0.015
0.035
0.025
00665
PHOS-TOT
MG/L P
0.040
0.050
0.060
0.040
0«040
0.040
0.030
0.030
0.030
0.015
0.050
0.060
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE ?fc/08/J3
DATE TIME DEPTH N02&N03
FROH OF
TO DAY FEET
7^/10/19
74/11/15
75/01/06
75/01/17
75/02/07
75/02/24
75/03/07
75/04/22
75/05/21
75/06/10
75/07/28
75/09/16
12 35
11 14
14 35
12 43
11 30
10 56
10 43
10 20
10 45
12 40
11 20
15 20
43 35 49»0 122 26 39,C 4
BUCK CREEK
4J 15 OAKRID6E
T/HILLS CREEK RESEftVOI* 130991
KIGDON RO BRDG 10.4 MI S OF OAKRIDGE
UEPALES 211120'*
0000 FEET DEPTH CLASS 00
0630
&N03
OTAL
'G/L
0.024
0.008
0.008
0.008
0.008
0.008
0.008
0.005
0.040
0.010
0.005
0.010
00625
TOT KJEL
N
MG/L
0.100K
0.600
0.100K
0.200
OolOOK
0.100K
0.100K
0.300
0.200
0.200
0.400
99610
NH3-N
TOTAL
MG/L
0.005
0.020
0.030
0.006K
3.016
0.008
0.012
0.020
0.015
0.015
9.010
0.005K
00671
PHOS-OIS
ORTHO
MG/L P
0.035
0.030
0.055
0.032
0.032
0.032
0.021
0.025
0.020
0.015
0.030
0.035
OC665
PHOS-TOT
MG/L P
0.035
0.040
0.090
0.050
0.035
0.040
0.030
0.030
0.030
0.015
0.050
0.050
K VALUE KNOrtN TO BE
LESS THAN INDICATED
-------
STOSFT «EV«IEVAL DATE ?
&/ 12
25
AS GAKMIDfit.
CHEEK RESERVOIR 130991
UKPVD RD BRCG 8=5 MI S OF OflKWIDGE
1JEPALES 2U1204
0890 FEET DEPTH CLASS 00
DATE
FwOM
TO
74/10/19
74/11/15
74/12/lo
VS/Oi/Ofi
75/01/17
75/02/07
75/02/2^
75/C3/07
75/04/2?
75/05/21
75/06/10
75/07/23
75/09/16
00630 08625
TIME DEPTH N02&N03 TOT KJ£L
OF W-YOTfiL N
CJAV FEET MG/L MG/L
12
10
14
14
12
11
10
11
10
10
13
10
15
10
47
00
55
55
00
43
33
00
20
00
45
35
0
0
0
0
0
0
0
o
0
0
0
0
0
,,356
.016
.032
.016
a016
.00(3
.008
o908
.005
.840
.315
.020
.025
Oo
1.
So
Oo
So
©.
e.
0.
o.
Oo
0,
0.
o.
308
050
190
160
200
100
500
100K
050K
400
05®
250
100
60610 00671 006S5
MH3-N PHOS-DIS PMOS-70?
TOTAL ORTriO
MG/L MG/L P MG/L P
6.
0.
0.
So
3.
0)9
Os
0.
0.
0.
0.
9.
0.
01S
029
015
010
068K
024
010
016
010
065
010
015
015
Oa
0.
Co
9®
Oc
0.
0.
0.
0.
0.
0.
0.
040
065
045
050
048
048
048
040
050
005
045
040
0804S
O.GSO
0.060
0.080
Oe05@
0*050
0.070
0.04©
0.040
Oe04Q
G.010
0.059
0.060
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL. OATt 76/^8/12
DATE TIME DEPTH
FROM OF
TO DAY FEET
74/10/19
74/11/15
74/12/16
75/01/06
75/01/17
75/02/07
75/02/24
75/03/07
75/04/22
75/05/21
75/06/10
75/07/28
75/09/16
11 10
09 55
11 15
13 50
12 00
09 55
10 07
10 55
09 25
09 45
13 00
10 15
43 41 00.0 122 22 15.0 4
HILLS CREEK
41 15 OAKRIDGE
T/HILLS CREEK RESERVOIR 130991
BNK .2 MI SE OF KITSON HOT SPRINGS
11EPALES 2111204
0000 FEET DEPTH CLASS 00
i0630
!&N03
OTAL
IG/L
0.016
O.OOS
0.048
0*016
0.016
o.ooa
0.008
0.008
0.005
0.040
0.020
0.005
0.010
00625
TOT KJEL
N
VIG/L
0.100
0.300
0.200
0.400
0.100K
0.200
0.125
0.150
0.200
0.350
0.050K
0.100
0.400
00610
NH3-M
TOTAL
MG/L
0.010
0.015
0.030
O.OSO
0.096
0.024
0.003K
0.008
0.015
0.025
0.010
0.007
0.005
00671
PHOS-DIS
ORTHO
MG/L P
0.030
0.025
0.035
0.040
0.032
0.010
0.028
0.028
0.012
0.030
0.025
0.015
00665
PHOS-TOT
MG/L P
0.030
0.030
0.040
0.060
0.035
0.020
0.035
0.028
0.020
0.031
0.030
0.030
0.040
K VALUE KNOWN TO BE
LESS THAN INDICATED
------- |