U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
LAKE PILLSBURY
LAKECOUflY
CALIFORNIA
EPA REGION IX
WORKING PAPER No, 755
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
-------
REPORT
ON
LAKE PILLSBURY
LAKE COUNTY
CALIFORNIA
EPA REGION IX
WORKING PAPER No, 755
WITH THE COOPERATION OF THE
CALIFORNIA STATE WATER RESOURCES CONTROL BOARD
AND THE
CALIFORNIA NATIONAL GUARD
MARCH, 1978
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CONTENTS
Page
Foreword ii
List of California Study Lakes iv
Lake and Drainage Area Map v
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 3
III. Lake Water Quality Summary 4
IV. Nutrient Loadings 8
V. Literature Reviewed 12
VI. Appendices 13
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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 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)], 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 concentration (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 California State Hater
Resources Control Board and the nine Regional Water Quality
Control Boards for professional involvement, to the California
National Guard for conducting the tributary sampling phase of
the Survey, and to those California wastewater treatment plant
operators who voluntarily provided effluent samples and flow
data.
The staff of the Division of Planning and Research of the
State Water Resources Control Board provided invaluable lake
documentation and counsel during the Survey, coordinated the
reviews of the preliminary reports, and provided critiques
most useful in the preparation of this Working Paper series.
Major General Glen C. Ames, the Adjutant General of Cali-
fornia, and Project Officer Second Lieutenant Terry L. Barrie,
who directed the volunteer efforts of the California National
Guardsmen, are also gratefully acknowledged for their assistance
to the Survey.
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IV
NATIONAL EUTROPHICATION SURVEY
STUDY RESERVOIRS
State of California
Name
Amaclor
Boca
Britton
Casitas
Crow!ey
Don Pedro
Elsinorc
Fallen Leaf
Hennessey
Henshaw
Iron Gate
Lopez
Mary
Mendocino
Nicasio
Lower Otay
Pillsbury
Santa Margarita
Shasta
Shaver
Silver
Tahoe
Tulloch
Lower Twin
Upper Twin
County
Amador
Nevada
Shasta
Ventura
Mono
Tuolumne
Riverside
El Dorado
Napa
San Diego
Siskiyou
San Luis Obispo
Mono
Mendocino
Mar in
San Diego
Lake
San Luis Obispo
Shasta
Fresno
Mono
El Dorado, Placer, CA;
Carson City, Douglas,
Washoe, NV
Calaveras, Tuolumne
Mono
Mono
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12 3'00'
122'45'
LAKE PILLSBURY
(^Tributary Sampling Site
X Lake Sampling Site
/*./ Drainage Area Boundary
0 5 10
h
Km.
Scale
s Mi.
39'15 —
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LAKE PILLSBURY
STORE! NO. 0619
CONCLUSIONS
A. Trophic Condition*:
Survey data indicate Lake Pillsbury is eutrophic. It ranked
thirteenth in overall trophic quality when the 24 California
lakes and reservoirs sampled in 1975 were compared using a com-
bination of six parameters**. Ten of the water bodies had less
median total phosphorus, eight had less and one the same median
orthophosphorus, nine had less and five the same median inorganic
nitrogen, 15 had less mean chlorophyll £, and 21 had greater mean
Secchi disc transparency. No significant decrease in dissolved
oxygen with depth was apparent during Survey sampling; however,
hypolimnetic depression has occurred during summer stratification
(Bailey, 1977).
Survey limnologists observed an algal bloom in progress in
the Rice Fork arm of the reservoir in March and emergent macrophytes
along the north shoreline in June. Fish kills are reported to be
a problem in the reservoir (Johns, 1975).
B. Rate-Limiting Nutrient:
The algal assay results indicate nitrogen limitation at
the time the sample was collected (03/12/75).
The reservoir data indicate nitrogen limitation in March and
November and phosphorus limitation at two of the three stations
in June. However, the relatively low concentrations of chloro-
* Trophic assessment is based on the levels of nutrients, dissolved oxygen,
and chlorophyll <^; phytoplankton kinds and numbers; and transparency
(Allurn et al., 1977).
** See Appendix A.
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2
phyll &_, the numbers of algae in the phytoplankton samples
(page 6), and the lack of transparency (the mean Secchi disc
depth was less than one meter) indicate primary productivity
may be light-limited at times rather than nutrient-limited.
C. Nutrient Controllability:
1. Point sources—No known point sources impacted Lake
Pillsbury during the sampling year.
The estimated phosphorus contribution of septic tank
systems serving near-shore dwellings, camps, and parks amounted
to less than 0.1% of the total load.
2. Non-point sources—The estimated phosphorus inputs of
the gaged tributaries accounted for 82.7% of the total load
reaching the reservoir during the sampling year. The ungaged
drainage area was estimated to have contributed 16.8% of the
total.
There was a loss of both phosphorus and nitrogen from the
reservoir during the sampling year. The most probable reason
for these losses was the lack of frequent sampling at the Eel
River outlet (station A-l) during the period of the year when
high flows occurred. This could result in an overestimation
of nutrients leaving Lake Pillsbury via the Eel River, par-
ticularly since water is withdrawn from near the bottom of the
reservoir (Puckett, 1969) where solubilization of previously
sedimented nutrients is likely to occur.
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II. RESERVOIR AND DRAINAGE BASIN CHARACTERISTICS1
A. Morphometry :
1. Surface area: 8.10 kilometers2.
2. Mean depth: 14.3 meters.
3. Maximum depth: 42.1 meters.
4. Volume: 115.830 x 106 m3.
5. Mean hydraulic retention time: 87 days.
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Name
Eel River
Rice Fork
Squaw Valley Creek
Smokehouse Creek
Salmon Creek
Minor tributaries &
immediate drainage -
Totals
2. Outlet -
Eel River
C. Precipitation***:
1. Year of sampling: 105.2 centimeters.
2. Mean annual: 97.6 centimeters.
Drainage
area (km2)*
362.6
224.6
9.1
32.9
32.6
78.6
740.4
Mean flow
(m3/sec)*
7.530
4.720
0.215
0.775
0.771
2.056
16.067
748.5**
15.410**
t Table of metric conversions—Appendix B.
tf- Dendy, 1974.
* For limits of accuracy, see Working Paper No. 175,
1973-1976".
** Includes area of reservoir; lesser outflow due to evaporation.
*** See Working Paper No. 175.
.Survey Methods,
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4
III. WATER QUALITY SUMMARY
Lake Pillsbury was sampled three times in 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
three stations on the reservoir (see map, page v). During each visit,
a single depth-integrated (4.6 m or near bottom to surface) sample
was composited from the stations for phytoplankton identification
and enumeration; and during the March 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 sta-
tions for chlorophyll ^analysis. The maximum depths sampled were
26.5 meters at station 1, 10.1 meters at station 2, and 15.8 meters
at station 3.
The sampling results are presented in full in Appendix D and are
summarized in the following table.
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PARAMETER
DISS OXY (MG/L)
CMOCTVY (MCWOMO)
PH (STAND UNITS)
TOf ALK (MG/L)
TOT P (MG/L>
OkTHO P (MG/L)
N02»NO:» (MG/L)
AMMONIA (MG/L)
AJtX N (MG/L)
INCMG N (MG/L)
TOTAL N (MG/L)
CnLf-JYL A (UG/L)
SECCHI (METERS)
A. SUMMARY OF PHYSICAL .
1ST SAMPLING ( 3/12/75)
3 SITES
wANGE.
5.3 - 7.5
10.h - 11.0
60. - 32.
7.7 - 7.9
38. - 54.
0.063 - 0.214
0.014 - 0.02C
0.020 - 0.05C
0.020 - 0.040
0.200 - .).4Cu
0.04V - 0.080
C.?2t - O.i»50
0.8
CHEMICAL CHARACTERISTICS FO* LAKE PILLSBURY
STO-JET COOE 0&19
2NU SAMPLING ( b/26/75)
3 bITES
SAMPLING (11/11/7S)
3 SITEb
MEAN
6. 7
10.9
68.
7.8
H5.
0.113
0.017
0.034
0.027
0.212
0.061
0.246
0.7
0.?
MEDIAN
7.0
11.0
67.
7.9
45.
0.099
0.016
0.035
U.03U
0.200
0.060
0.235
0.7
0.?
KANGE
9.3
6.6
100.
7.1
56.
0.013
0.002
0.020
0.020
0.200
0.040
0.220
13.0
1 .?
- 19.4
- 10.0
- 142.
9.4
144.
- 0.034
- 0.020
- 0.430
- 0.050
- 0.600
- 0.450
- 0.730
- 18.0
1 .H
MEAN
16.1
8.6
127.
8.7
71.
0.020
0.007
0.065
0.037
0.3&7
0.102
0.432
lb.9
1 -5
MEDIAN
17.9
9.0
135.
9.1
62.
0.019
O.OOS
0.020
0.040
0.350
0.060
0.420
16.6
1 .u
KANut
10.8
8.2
71.
7.6
71.
O.Olo
0.003
0.020
0.020
0.200
0.040
0.220
1.3
- 11.6
- 10.4
- 110.
7.8
91.
- 0.024
- 0 . 0 0 o
- 0.020
- U.020
- d.200
- 0.040
- 0.220
3.7
MEAN
11.2
8.7
84.
7.7
84.
0.019
0.005
0.02U
0.020
0.200
0.040
0.220
2.6
MEDIAN
11.3
e.«
85.
7. 7
88.
0.01*
0.005
0.020
0.020
0.200
0.040
0.220
2.d
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B.
Biological characteristics:
1. Phytoplankton -
Sampling
Date
03/12/75
06/26/75
-
11/11/75
Dominant
Genera
1.
2.
1.
2.
3.
1.
2.
3.
4.
Synedra sp_.
Euglena sp.
Total
Anabaena sp.
Cryptomonas sp.
Trachelomonas sp.
Total
Melosira sp.
Cryptomonas sp.
Dactyl ococcops is sp.
Chroomonas (?) sp.
Algal Units
per ml
10
10
20
1,861
64
64
1,989
331
37
37
36
2. Chlorophyll a_ -
Sampling
Date
03/12/75
06/26/75
11/11/75
Total 441
Station
Number
1
2
3
1
2
3
1
2
3
Chlorophyll a^
0.6
0.7
0.8
13.0
16.6
18.0
2.8
1.3
3.7
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7
Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked -
Ortho P Inorganic N Maximum yield
Spike (mg/1) Cone, (mg/1) Cone, (mg/1) (mg/1-dry wt.)
Control 0.015 0.040 0.6
0.050 P 0.065 0.040 1.5
0.050 P + 1.0 N 0.065 1.040 31.7
1.0 N 0.015 1.040 2.4
2. Discussion -
The control yield of the assay alga, Selenastrum capri-
cornutum, indicates that the potential primary productivity
of Lake Pillsbury was low at the time the sample was collected
(03/12/75). The lack of significant increase in yield with
the addition of orthophosphorus, and the significant increase
in yield when nitrogen alone was added, indicate nitrogen
limitation.
The reservoir data indicate nitrogen limitation at all
three stations in March and November (the mean inorganic
nitrogen/orthophosphorus ratios were 4/1 and 8/1, respectively).
In June, nitrogen limitation is indicated at station 1 (N/P =
7/1) but phosphorus limitation is indicated at stations 2 and
3 (N/P =21/1 and 19/1, respectively).
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8
IV. NUTRIENT LOADINGS
(See Appendix E for data)
For the determination of nutrient loadings, the California 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 February, March, and April when two samples were col-
lected. Sampling was begun in November, 1974, and was completed in
November, 1975.
Through an interagency agreement, stream flow estimates for the
year of sampling and a "normalized" or average year were provided by
the California 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
program for calculating stream loadings*. Nutrient loads for unsampled
"minor tributaries and immediate drainage" ("ZZ" of U.S.G.S.) were
estimated using the means of the nutrient loads, in kg/km2/year, at
stations B-l, C-l, D-l, and E-l and multiplying the means by the ZZ
area in km2.
No known wastewater treatment plant impacted Lake Pillsbury during
the sampling year.
* See Working Paper No. 175.
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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 yr total
a. Tributaries (non-point load) -
Eel River 13,110 50.4
Rice Fork 4,550 17.5
Squaw Valley Creek 1,085 4.2
Smokehouse Creek 1,735 6.7
Salmon Creek 1,005 3.9
b. Minor tributaries & immediate
drainage (non-point load) - 4,380 16.8
c. Known municipal STP's - None
d. Septic tanks* - 10 < 0.1
e. Known industrial - None
f. Direct precipitation** - 140 0.5
Total 26,015 100.0
2. Outputs -
Reservoir outlet - Eel River 30,910
3. Net annual P loss - 4,895 kg.
* Estimate based on 17 dwellings, 3 campgrounds, and 1 picnic area;
see Working Paper No. 175.
** See Working Paper No. 175.
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10
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
kg N/ % of
Source • yr total
a. Tributaries (non-point load) -
Eel River 232,165 51.0
Rice Fork 78,420 17.2
Squaw Valley Creek 16,095 3.5
Smokehouse Creek 17,380 3.8
Salmon Creek 31,475 6.9
b. Minor tributaries & immediate
drainage (non-point load) - 70,975 15.6
c. Known municipal STP's - None
d. Septic tanks* - 425 0.1
e. Known industrial - None
f. Direct precipitation** - 8,745 1.9
Total 455,680 100.0
2. Outputs -
Reservoir outlet - Eel River 599,395
3. Net annual N loss - 143,715 kg.
D. Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr kg N/km2/yr
Eel River 36 640
Rice Fork 20 349
Squaw Valley Creek 119 1,769
Smokehouse Creek 53 528
Salmon Creek 31 966
* Estimate based on 17 dwellings, 3 campgrounds, and 1 picnit area;
see Working Paper No. 175.
** See Working Paper No. 175.
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11
E. 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 Accumulated
Total Nitrogen
Total Accumulated
grams/mVyr
3.21
loss*
56.36
loss*
Vollenweider phosphorus loadings
(g/m2/yr) based on mean depth and mean
hydraulic retention time of Lake Pillsbury:
"Dangerous" (eutrophic loading)
"Permissible" (oligotrophic loading)
1.48
0.74
* See page 2.
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12
LITERATURE REVIEWED
Allum, M. 0., R. E. Glessner, and J. H. Gakstatter, 1977. An evalu-
ation of the National Eutrophication Survey data. Working Paper
No. 900, Corvallis Env. Res. Lab., Corvallis, OR.
Bailey, Thomas E., 1977. Personal communication (reviews of pre-
liminary report). CA Water Res. Contr. Bd., Sacramento.
Dendy, William B., 1974. Personal communication (reservoir infor-
mation and morphometry). CA Water Res. Contr. Bd., Sacramento.
Johns, Gerald E., 1975. Personal communication (Lake Pillsbury
water quality data). CA Water Res. Contr. Bd., Sacramento.
Puckett, Larry K., 1969. Limnological observations at five northern
California reservoirs. Water Proj. Br. Adm. Rept. 69-17, CA
Dept. of Fish & Game, Sacramento.
Vollenweider, R. A., and P. 0. Dillon, 1974. The application of
the phosphorus loading concept to eutrophication research. Natl.
Res. Council of Canada Pub!. No. 13690, Canada Centre for Inland
Waters, Burlington, Ontario.
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13
APPENDIX A
LAKE RANKINGS
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LAKE DATA TO BE USED IN BANKINGS
LAKE
CODE LAKE NAME
060J AMADOW RESERVOIR
0603 80CA LAKE
0603 LAKE 8PITTON
0604 CAS IT AS RESERVOlK
0605 CROhLEY LAKE
0606 DON PEORO RESE-tVOIR
0607 LAKE ELSINORE
060* FALLEN LEAF RESERVOIR
0609 LAKE HENNESSEY
0610 LAKE HENSHAW
0611 IRON GATE RESERVOIR
061* LOPEZ LAKE
0615 LAKE MARY
06it LAKE MENDOCINO
0617 NICASIO RESERVOIR
0618 LOWER OTAY RESERVOIR
0619 LAKE PILLSBURY
0630 SANTA MARGARITA LAKE
0621 SHASTA LAKE
0622 SHAVER
0623 SILVER LAKE
0624 TULLOCK RESERVOIR
0625 UPPER TWIN LAKES
0626 LOWER TWIN LAKES
MEDIAN
TOTAL f
0.040
0.012
0.067
0.029
0.04f,
0.013
0.469
0.007
0.027
0.138
0.184
0.371
0.010
0.020
0.055
0.058
0.022
0.037
0.021
0.014
0.012
0.025
0.015
0.014
MEDIAN
1NORG N
0.390
0.040
0.115
0.050
0.045
0.060
0.120
0.040
0.060
0.070
0.690
0.090
0.040
0.050
0.345
0.180
0.060
0.070
0.060
0.060
0.055
0.060
0.040
0.040
500-
MEAN SEC
408.667
372.833
44de500
400.250
374.750
381.733
489.214
24.357
416.000
461.000
440.333
372.000
296.000
436.500
482.778
447.250
466.667
400.000
381.542
346.400
356.000
433.000
300.200
248.000
MEAN
CHLOtfA
22.383
1.700
4.811
3.192
5.800
3.564
70.572
0.786
4.525
26.783
6.217
8.658
2.550
3.100
6.633
15.933
6.389
9.122
4.087
1.700
1.800
13.878
3.340
2.900
15-
MIN 00
14.600
6.80C
11.200
14.000
12.200
11.400
8.000
8.800
15.000
9.800
13.800
15.000
10.600
9.400
9.800
15.000
8.200
14.800
9.000
7.400
7.000
7.400
7.400
11.400
MEDIAN
OISS GRTHO P
0.020
0.003
0.047
0.014
0.034
0.004
0.092
0.005
0.012
0.073
0.124
0.343
0.002
0.008
0.013
0.013
0.008
0.014
0.015
0.004
0.003
0.009
0.004
0.003
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PERCENT OF LflKES wITi rilGhER VALUES
( 20)
( 4)
( 10)
( 7)
( 19)
( 0)
( 23)
( 11)
( 3)
( 2)
< 1>
( 22)
( 15)
( 6)
{ 5)
( 13)
( 9)
( 14)
( 18)
(20)
( 12)
( 16)
( 17)
MEDIAN
INOWG N
4 (
98 (
22 <
74 (
78 <
54 (
17 (
87 (
54 (
33 (
0 (
26 (
87 (
70 (
9 (
13 <
41 <
33 <
54 <
*1 (
65 (
54 (
98 <
87 (
1)
22)
5)
17)
18)
11)
4)
19)
11)
7)
0)
6)
19)
16)
2)
3)
9)
7)
11)
9)
15)
11)
22)
19)
500-
MEAN SEC
43
70
17
48
65
57
0
.100
39
13
26
74
91
30
4
22
9
52
61
83
78
35
87
96
( 10)
( 16)
( 4)
( 11)
( 15)
( 13)
( 0)
( 23)
( 9)
( 3)
( 6)
( 17)
( 21)
( 7)
( 1)
( 5)
( 2)
< 12)
( 14)
( 19)
( 18)
( 8)
( 20)
( 22)
MEAN
CHLORA
9 (
91 (
48 (
7C (
43 (
61 (
0 (
100 (
52 (
4 (
39 <
26 (
83 (
74 <
30 (
13 (
35 (
22 <
57 (
96 (
87 <
17 (
65 (
78 (
2)
21)
11)
16)
10)
14)
0)
23)
12)
1)
9)
6)
19)
17)
7)
3)
8)
5)
13)
22)
20)
4)
15)
18)
15-
MIN 00
17
100
43
22
30
37
78
70
4
54
26
4
48
61
54
4
. 74
13
65
87
96
87
87
37
( 4)
( 23)
( 10)
( 5)
( 7)
( 8)
( 18)
( 16)
( 0)
( 12)
( 6)
( 0)
< 11)
( 14)
( 12)
< 0)
< 17)
( 3)
( 15)
( 19)
< 22)
( 19)
( 19)
( 8)
MEDIAN
DISS ORTHO P
26 1
91 1
17 1
37 1
22 I
78 i
9 1
70 I
52 I
13 i
4 I
0 <
100 <
63 I
46 i
46 i
63 i
37 l
30 <
78 1
91 1
57 1
78 1
91 1
( 6)
i 20)
1 4)
1 8)
! 5)
1 17)
1 2)
I 16)
1 12)
I 3)
I 1)
( 0)
I 23)
I 14)
! 10)
t 10)
I 14)
I 8)
I 7)
I 17)
! 20)
I 13)
I 17)
: 20)
INDEX
NO
134
539
164
294
266
370
104
527
249
130
104
134
505
363
169
120
279
196
328
463
506
302
485
463
-------
LAKES RANKED BY INDEX NOS.
RANK LAKE CODE LAKE NAME INQEX NO
1 0602 BOCA LAKE 539
2 0608 FALLEN LEAF RESERVOIR 527
3 0623 SILVER LAKE 506
* 0615 LAKE MARY 505
5 0625 UPPER TWIN LAKES 485
6 0626 LOWER TWIN LAKES 463
7 0622 SHAVER 463
8 0606 DON PEDRO RESERVOIR 370
9 0616 LAKE MENDOCINO 363
10 0621 SHASTA LAKE 328
11 0624 TULLOCK RESERVOIR 302
12 0604 CASITAS RESERVOIR 294
13 0619 LAKE PILLSBURY 279
14 0605 CROrtLEY LAKE 268
15 0609 LAKE HENNESSEY 249
16 0620 SANTA MARGARITA LAKE 196
17 0617 NICASIO RESERVOIR 169
18 0603 LAKE BrtlTTON 164
19 0614 LOPEZ LAKE 134
20 0601 AMADOR RESERVOIR 134
21 0610 LAKE HENSHAW 130
22 0618 LOWER OTAY RESERVOIR 120
23 0607 LAKE ELSINORE 104
24 0611 IRON GATE RESERVOIR 104
-------
APPENDIX B
CONVERSION FACTORS
-------
CONVERSION FACTORS
Hectares x 2.471 = acres
Kilometers x 0.6214 = miles
Meters x 3.281 = feet
-4
Cubic meters x 8.107 x 10 = acre/feet
Square kilometers x 0.3861 = square miles
Cubic meters/sec x 35.315 = cubic feet/sec
Centimeters x 0.3937 = inches
Kilograms x 2.205 = pounds
Kilograms/square kilometer x 5.711 = Ibs/square mile
-------
APPENDIX C
TRIBUTARY FLOW DATA
-------
TRIBUTARY FLO* INFORMATION FOR CALIFORNIA
12/03/76
LAKE CODE 0619
LAKE PILLSBURRY
TOTAL DRAINAGE AREA OF LAKE(SQ KM)
748.5
MAY
SUB-DRAINAGE
TRIBUTARY AREA(SO KM) JAN FEB MAR APR
0619A1
0619A2
061981
0619C1
0619D1
0619E2
0619ZZ
TOTAL DRAINAGE AREA OF LAKE = 748.5
SUM OF SUB-DRAINAGE AREAS '» 748.5
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
NORMALIZED FLOWS(CMS)
JUN JUL AUG
SEP
OCT
NOV
DEC
MEAN
748.5
362.6
224.6
9.1
32.9
32.6
86.8
35.68
19.26
11.61
0.623
2.010
1.982
6.230
40.21
19.82
13.03
0.623
2.464
2.435
6.230
25.85
14.44
9.06
0.396
1.331
1.331
3.681
19.60
12.18
6.80
0.261
0.963
0.963
2.379
9.23
6.23
2.83
0.059
0.311
0.311
0.368
5.52
2.32
1.08
0.020
0.125
0.125
0.099
5.55
0.59
0.34
0.0
0.048
0.048
0.042
5.64
0.28
0.17
0.0
0.0
0.0
0.0
6.06
0.23
0.14
0.0
0.0
0.0
0.0
6.14
0.82
0.51
0.0
0.068
0.071
0.198
6.48
3.96
2.52
0.110
0.425
0.425
0.878
20.61
11.04
9.06
0.510
1.671
1.671
4.814
15.41
7.53
4.72
0.215
0.775
0.771
2.056
TRIBUTARY MONTH YEAR
0619A1
MEAN FLOW DAY
FLOW DAY
0619A2
11
12
1
2
3
4
5
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
74
74
75
75
75
75
75
75
75
75
75
74
74
75
75
75
75
75
75
75
75
75
75
SUMMARY
TOTAL FLOW IN =
TOTAL FLOW OUT =
194.62
186.58
FLOW DAY
FLOW
8.495
7.023
5.550
51.253
85.234
21.662
17.188
3.794
3.426
8.410
8.212
0.363
3.115
5.097
36.812
42.475
14.158
9.061
2.492
0.481
0.0
0.0
0.0
17
14
19
1
8
5
3
28
31
21
11
16
15
19
2
9
6
4
7
29
31
21
12
8.693
7.957
7.334
5.748
131.956
19.340
26.023
3.568
3.426
8.835
8.212
0.311
0.906
3.115
26.613
53.802
17.556
12.743
3.115
0.311
0.0
0.0
0.0
22
18
20
23
19
20
31
46.156
206.996
19. 765
13.592
76.455
9.628
4.248
-------
TRIBUTARY FLOW INFORMATION FOR CALIFORNIA
12/02/76
LAKE CODE 0619
LAKE PILLSBURRY
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY
0619B1
0619C1
061901
0619E2
11
12
1
2
3
4
5
6
7
8
9
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
74
74
75
75
75
75
75
75
75
75
75
74
74
75
75
75
75
75
75
75
75
75
75
74
74
75
75
75
75
75
75
75
75
75
75
74
74
75
75
75
75
75
75
75
75
75
75
FLOW DAY
0.227
1.954
3.115
22.087
25.768
8.778
5.663
1.529
0.311
0.0
0.0
0.008
0.085
0.113
0.873
1.019
•0.340
0.227
0.057
0.0
0.0
0.0
0.0
0.034
0.283
0.453
3.115
3.681
1.3C3
0.821
0.227
0.045
0.0
0.0
0.0
0.034
0.283
0.453
3.115
3.681
1.3C3
0.821
0.227
0.045
0.0
0.0
0.0
16
15
19
2
9
6
3
7
29
31
7
17
14
19
1
a
5
3
7
28
31
20
12
17
14
19
1
8
5
3
7
28
31
20
11
17
14
19
1
8
5
3
7
28
31
20
11
0.198
0.566
1.897
16.424
33.980
10.760
7.929
2.010
0.193
0.0
0.0
0.008
0.023
0.085
0.878
1.897
0.453
0.311
0.079
0.0
0.0
0.0
0.0
0.0
0.085
0.283
3.115
6.796
1.642
1.161
0.283
0.0
0.0
0.0
0.0
0.0
0.085
0.283
3.115
6.796
1.642
1.133
0.283
0.0
0.0
0.0
0.0
23
19
22
18
20
22
18
20
22
18
20
FLOW DAY
8.495
6.230
FLOW
0.396
2.435
0.227
1.383
8.778
0.850
1.388
8.778
0.850
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STORE! RETRIEVAL DATE 76/09/24
DATE
FROM
TO
75/03/12
75/06/26
75/11/11
'
TIME
OF
DAY
10 25
10 25
10 25
10 25
10 25
10 25
10 25
10 00
10 00
10 00
10 00
10 00
10 00
10 00
10 40
10 40
10 40
10 40
10 40
DEPTH
FEET
0000
0005
0015
0025
0040
0060
0081
0000
0005
0015
0025
0035
0055
0087
0000
0005
0015
0035
0056
00010
WATER
TEMP
CENT
7.5
7.5
7.0
5.8
5.3
5.6
5.7
17.9
17.9
17.7
17.7
12.3
10.4
9.3
11.6
11.6
11.6
11.4
10.9
061901
39 24 26.0 122 57 20.0 3
LAKE PILLSBURY
06033 CALIFORNIA
140291
11EPALES 2111202
0085 FEET DEPTH CLASS 00
00300
00
MG/L
10.6
10.6
11.0
11.0
11.0
11.0
11.0
10.0
9.0
9.0
9.0
7.2
7.4
7.6
8.6
8.8
10.4
8.4
8.2
00077 00094
TRANSP CNOUCTVY
SECCHI FIELD
INCHES MICROMHO
10 79
79
82
67
62
60
62
72 140
135
137
135
115
100
102
85
91
86
78
110
00400
PH
SU
7.90
7.90
7.85
7.70
7.70
7.90
7.75
9.10
9.15
9.15
9.10
8.10
7.75
7.10
7.70
7.70
7.70
7.70
7.60
00410
T ALK
CAC03
MG/L
51
52
54
46
40
40
38
70
70
60
62
60
56
56
87
88
89
73
91
00610
NH3-N
TOTAL
MG/L
0.030
0.020K
0.020
0.040
0.030
0.030
0.030
0.040
0.040
0.040
0.040
0.020
0.040
0.040
0.020K
0.020K
0.020K
0.020K
0.0 20K
00625
TOT KJEL
N
MG/L
0.400
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.600
0.600
0.400
0.400
0.200
0.200
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
00630
N02&N03
N-TOTAL
MG/L
0.050
0.040
0.040
0.040
0.040
0.040
0.040
0.020
0.020K
0.020
0.020K
0.020K
0.020
0.030
0.020K
0.020K
0.020K
0.020K
0.020K
00671
PHOS-OIS
ORTHO
MG/L P
0.017
0.016
0.017
0.016
0.018
0.020
0.020
0.005
0.005
0.005
0.004
0.009
0.014
0.014
0.004
0.004
0.004
0.005
0.005
DATE
FROM
TO
75/03/12
75/06/26
75/11/11
00665 32217 00031
TIME DEPTH PHOS-TOT CHLRPHYL INCDT LT
OF A REMNING
DAY FEET
10
10
10
10
10
10
10
10
10
10
10
1C
10
10
10
10
10
10
10
25
25
25
25
25
?5
25
00
00
00
00
00
00
00
40
40
40
40
40
0000
0005
0015
0025
0040
0060
0081
0000
0005
0015
0025
0035
0055
0087
0000
0005
0015
0035
0056
MG/L P
0,
0,
0.
0.
0.
0.
0.
0.
0,
0.
0,
0,
0.
0,
0,
0,
0,
0,
0,
,070
,065
.070
,093
,136
.214
.211
.019
.016
.019
.015
.016
.034
.026
.016
.016
,017
.020
.021
UG/L PERCENT
0.6
13.0
2.8
-------
STORET RETRIEVAL DATE 76/C9/2*
061*02
39 25 52.C 122 58 24.0 3
LAKE PILLSBURY
06033 CALIFORNIA
140291
11EFALES
2111202
0028 FEET DEPTH CLASS
DATE
FROM
TO
75/03/12
75/06/26
75/11/11
DATE
FROM
TO
75/03/12
75/06/26
75/11/11
TIME DEPTH
OF
DAY FEET
11 20 0000
11 ?0 0005
11 20 0015
11 20 0024
10 45 0000
10 45 0005
10 45 0015
10 45 0022
10 45 0033
10 00 0000
10 00 0005
TIME DEPTH
OF
DAY FEET
11 ?>0 0000
11 ?0 0005
11 20 0015
11 20 0024
10 45 0000
10 45 0005
10 45 0015
10 45 0022
10 45 0033
10 00 0000
10 00 0005
00010
WATER
TEMP
CENT
7.2
7.0
6.9
7.0
18.9
18.7
18.4
18.1
13.5
11.1
10.8
00665
PHOS-TOT
MG/L P
0.097
C.123
0.092
0.102
0.015
0.0?3
0.013
0.018
0.013
0.024
0.019
00300
DO
MG/L
10.6
10.8
10.6
10.8
9.4
9.4
9.0
9.0
6.8
8.8
9.0
32217
CHLRPHYL
A
UG/L
0.7
"
16.6
1.3
00077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES MICROMHO
8 65
64
65
66
54 135
135
134
132
116
76
75
00031
INCDT LT
REMNING
PERCENT
00400
PH
SU
7
7
7
7
9
9
9
9
8
7
7
.90
.90
.90
.80
.15
.30
.20
.20
.10
.75
.75
00410
T ALK
CAC03
MG/L
38
40
41
42
62
62
61
63
59
71
71
00610
NH3-N
TOTAL
MG/L
0.030
0.020
0.040
0.030
0.040
0.040
0.050
0.040
0.040
0.020K
0.020K
00
00625
TOT KJEL
N
MG/L
0.200K
0.200
0.200K
0.200K
0.600
0.500
0.400
0.300
0.200
0.200K
0.200K
00630
N02&N03
N- TOTAL
MG/L
0.030
0.030
0.040
0.030
0.020
0.020K
0.020K
0.020K
0.020
0.020K
0.020K
00671
PHOS-OIS
ORTrtO
MG/L P
0.014
0.015
0.019
0.015
0.002
0.003
0.003
0.003
0.004
0.003
0.005
K VPLUE KNOWN TO BE
LESS THAN INDICATED
-------
STORtT RETRIEVAL DATF. 76/09/24
DATE
FROM
TO
75/03/12
75/C6/26
75/11/11
00010
TIME DEPTH WATER
OF TEMP
DAY FEET CENT
12 00 0000 7.5
12 00 0005 7.3
12 00 0015 7.3
12 00 0030 6.7
12 00
1
1
1
1
1
1
55
55
55
55
55
55
09 15
09 15
09 15
09 15
0052
0000
0005
0015
0020
0035
0051
0000
0005
0015
0031
5.6
19.4
19.3
18.6
18.3
12.8
10.4
11.3
11.3
11.3
10.8
061503
39 24 50.0 122 56 08.0 3
LAKE PILLSBURY
06033 CALIFORNIA
140291
11EPALES
2111202
OOS& FEET DEPTH CLASS
00300
DO
MG/L
11.0
11.0
11.0
11.0
11.0
9.4
9»6
9.6
8.6
7.6
7.8
8.4
8.4
8.4
8.4
00077 00094
TRANSP CNOUCTVY
SECCHI FIELD
INCHES MICROMHO
8 70
69
69
68
63
48 142
139
138
139
106
105
93
71
88
75
00400
PH
su
7.ao
7.80
7.90
7.90
7.90
9.40
9.40
9.40
9.15
7.85
7.80
7.70
7.70
7.70
7.70
00410
T ALK
CAC03
MG/L
47
47
47
49
44
144
141
65
64
60
60
88
88
87
90
00610
NH3-N
TOTAL
MG/L
0.020
0.020
0.020
0.020K
0.030
0.030
0.020K
0.040
0.040
0.030
0.030
0.020K
0.020K
0.020K
0.020K
00
00625
TOT KJEL
N
MG/L
0.200K
0.200K
0.200K
0.200K
0.200K
0.300
0.300
0.400
0.600
0.200
0.200
0.200K
0.200K
0.200K
0.200K
00630
N02S.N03
N-TOTAL
MG/L
0.020
0.020
0.020
0.030
0.030
0.410
0.430
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00671
PHOS-UIS
ORTHO
MG/L P
0.016
0.016
0.015
0.017
0.018
0.015
0.020
0.003
0.003
0.006
0.010
0.006
0.008
0.005
0.004
DATE
FROM
TO
75/03/1?
75/06/26
75/11/11
TIME
OF
DAY
12 00
12 00
12 00
12 00
12 00
11 55
11 55
11 55
11 55
11 55
11 55
09 15
09 15
09 15
09 15
DEPTH
FEET
0000
0005
0015
0030
0052
0000
0005
0015
0020
0035
0051
0000
0005
0015
0031
00665
PHOS-TOT
MG/L P
0.063
0.090
U.112
0.115
0.151
0.021
0.028
0.019
0.020
0.017
0.022
0.020
0.024
0.019
0.018
32217 00031
CHLRPHYL INCDT LT
A REMNING
UG/L PERCENT
0.8
18.0
3.7
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
APPENDIX E
TRIBUTARY DATA
-------
STORE! RETRIEVAL OATE 76/09/24
DATE TIME DEPTH
FROM OF
TO DAY FEET
74/11/17
74/12/14
75/01/10
75/03/01
75/02/22
75/03/08
75/03/18
75/04/05
75/04/20
75/05/03
75/07/28
75/08/31
75/09/21
75/10/11
75/11/02
10 55
12 00
13 30
14 15
10 35
00
00
30
00
00
00
no
12 15
11 00
12 50
0619A1
39 24 25.0 122 57 45.0 4
EEL KIVER
06 7.5 LK PILLSBORY
0/LAKE PILLSBUKY 140291
8NK END UNPVD RD .2 MI BELO SCOTT DAM
11EPALES 2111204
0000 FEET DEPTH CLASS 00
'0630
't>N03
OT&L
IG/L
0.016
0.040
0.056
0.072
0.032
0.016
0.022
0.015
0.010
0.015
0.070
0.130
C.010
C.015
0.005
00625
TOT KJEL
N
MG/L
0.700
0.700
1.500
1.750
0.700
0.300
1.650
2.400
0.700
1.600
0.150
0.400
2.600
0.400
00610
NH3-N
TOTAL
MG/L
0.045
0.103
0.115
0.168
0.043
0.008K
0.035
0.020
0.020
0.015
0.005
0.025
0.040
0.010
00671
PhOS-DIS
ORTHO
MG/L P
0.007
0.010
0.030
0.017
0.024
0.024
0.031
0.020
0.020
0.020
0.010
0.005K
0.005
0.005K
0.005K
00665
PHOS-TOT
MG/L P
0.020
0.060
0.030
0.100
0.100
0.040
0.155
o.oao
0.060
0.070
0.050
0.040
0.030
0.010
K VALUE KNOWN TO B£
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/09/2*
DATE TIME DEPTH N02&N03
FROM OF
TO DAY FEET
74/11/16 15 45
75/01/19 13 30
75/06/07 12 30
75/07/29 14 30
75/08/31 14 20
75/09/21 15 10
0619A2
39 23 45.0 122 52 52.0 4
EEL RIVES
06 7.5 LK PILLSBURY
T/LAKE PILLSB'JRY 140291
BNK 100 FT W OF JEtP TRAIL
liEPftLES 2111204
0000 FEET DEPTH CLASS 00
0630
'&N03
OTAL
IG/L
0.016
0.008
0.010
0.005
0.015
0.015
00625
TOT KJEL
N
MG/L
2.100
1.000
0.500
0.050K
0.500
0.100K
C0610
NH3-N
TOTAL
MG/L
O.CB5
0.030
0.015
0.005K
0.015
0.005K
00671
PHOS-QIS
ORTHO
MG/L P
0.020
0.020
0.020
0.025
0.010
0.025
OC665
PHOS-TOT
MG/L P
0.120
0.020
0.070
0.040
0.03C
0.025
K VALUE KNOWN TO 3E
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 76/09/24
DATE TIME DEPTH N02&N03
FROM OF
TO DAY FEET
74/11/16 14 05
74/12/15 11 30
75/02/23 11 45
75/04/19 14 00
75/05/03 11 00
75/06/07 13 00
75/07/29 11 00
75/08/31 12 00
75/09/07 12 00
061961
39 22 40.0 122 55 05.0 4
RICE FORK
06 7.5 LK PILLSBUKY
T/LAKE PILLSBURY 140291
JEEP TRL XING 2.8 MI SE OF SCOTT 0AM
11EPALES 2111204
0000 FEET DEPTH CLASS 00
0630
&N03
OTAL
G/L
0.008
0.192
0.015
0.005
0.015
0.065
0.015
0.010
0.030
006?5
TOT KJEL
N
MG/L
1.000
0.600
0.700
0.300
0.050K
0.300
0.100
0.900
0.500
00610
NH3-N
TOTAL
MG/L
0.075
0.010
0.016
0.005
0.010
0.010
0.010
0.015
0.015
00671
PriOS-DIS
ORTHO
MG/L P
0.020
0.010
0.016
0.020
0.010
0.010
0.010
0.015
0.015
00665
PHOS-TOT
MG/L P
0.020
0.010
0.030
0.020
0.030
0.040
0.015
0.040
0.030
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 76/C9/24
G619C1
39 26 15.0 122 55 45.0 4
SQUAW VALLEY CREEK
06 7.5 LK PILLSBURY
T/LAKE PILLSBURY 140291
UNPVO RO BROG .5 M E OF SUNSET PT CMPGKL)
11EPALES 2111204
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
74/11/17
74/12/14
75/01/19
75/02/01
75/02/2?
75/03/08
75/03/18
75/04/05
75/04/20
75/05/03
75/06/07
00630 00625
TIME DEPTH N02kN03 TOT KJEL
OF N-TOTAL N
DAY FEET
11
13
14
14
14
14
14
15
13
14
15
25
30
40
45
00
00
00
00
30
00
30
MG/L
0
0
0
0
0
0
0
0
0
0
0
.024
.064
.144
.032
.032
.024
.010
.005
.005
.010
.010
MG/L
0.
1.
1.
0.
0.
0.
1.
1.
0.
0.
0.
400
300
400
900
400
600
aoo
380
550
150
050K
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
!).
0.
0.
0.
0.
0.
0.
020
025
015
024
016
008K
022
020
015
010
030
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
f>
025
025
020
015
016
024
024
035
020
020
043
MG/L P
0.025
0.030
0.020
0.030
0.020
0.130
0.090
0.110
0.020
0.050
0.045
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATF 76/09/24
DATE TIME DEPTH N02&N03
FROM OF
TO DAY FEET
75/01/19
75/02/01
75/02/22
75/03/08
75/03/18
75/04/05
75/04/20
75/05/03
75/06/07
14
15
13
13
13
14
13
13
14
10
00
00
00
00
00
00
00
30
061901
34 27 35.0 122 57 10.0 4
SMOKEHOUSE CREEK
06 7.5 LK PILLS6URY
T/LAKE PILLSBUWY 140291
BNK 1.3 MI N* OF HULL MT RD JCT
11EPALES 2111204
0000 FEET DEPTH CLASS 00
0630
'&N03
OTAL
IG/L
0.008
0.008
0.016
0.008
0.007
0.010
0.005
0.010
0.005
00625
TOT KJEL
N
MG/L
0.200
0.500
0.400
0.400
2.300
0.500
0.500
0.450
0.550
00610
NH3-N
TOTAL
MG/L
0.005K
0.008K
0.012
0.008K
0.070
0.015
C.025
0.015
0.015
00671
PHOS-DIS
ORTHO
MG/L P
0.010
0.010
0.016
0.016
0.022
0.040
0.015
0.015
0.015
00665
PHOS-TOT
MG/L P
0.019
0.010
0.020
0.130
0.100
0.160
0.030
0.040
0.040
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/09/24
OATE TIME DEPTH
FROM OF
TO DAY FEET
74/12/14
75/01/19
75/02/01
75/02/2?
75/03/08
75/03/18
75/04/05
75/04/20
75/05/03
75/06/07
19
U
15
11
1?
12
14
11
12
13
00
00
15
30
00
00
SO
00
30
0619E2
39 21 13.0 122 57 bS.O 4
SALMON CREEK
06 7.5 LK PILLS3URY
T/LAKE PILLS8URY 1*0291
END OF RO 2.2 MI N OF SOl)A CREEK STATION
HEPALES 2111204
0000 FEET DEPTH CLASS 00
0630
:
------- |