U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
AMERICAN U\KE
PIERCE COUNTY
WASHINGTON
EPA REGION X
WORKING PAPER No, 864
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
-------
REPORT
ON
AMERICAN LAKE
PIERCE COUNTY
WASHINGTON
EPA REGION X
WORKING PAPER No, 864
WITH THE COOPERATION OF THE
WASHINGTON DEPARTMENT OF ECOLOGY
AND THE
WASHINGTON NATIONAL GUARD
JULY, 1977
-------
REPORT ON AMERICAN LAKE
PIERCE COUNTY, WASHINGTON
EPA REGION X
by
National Eutrophication Survey
Water and Land Quality Branch
Monitoring Operations Division
Environmental Monitoring & Support Laboratory
Las Vegas, Nevada
and
Special Studies Branch
Corvallis Environmental Research Laboratory
Corvallis, Oregon
Working Paper No. 864
OFFICE OF RESEARCH AND DEVELOPMENT
U.S. ENVIRONMENTAL PROTECTION AGENCY
July 1977
-------
CONTENTS
Page
Foreword i i
List of Washington Study Lakes iv
Lake and Drainage Area Map v
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 4
III. Lake Water Quality Summary 6
IV. Nutrient Loadings 12
V. Literature Reviewed 16
VI. Appendices 17
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ii
FOREWORD
The National EutropMcatlon Survey was Initiated 1n 1972 1n
response to an Administration commitment to Investigate the nation-
wide threat of accelerated eutrophicatlon to freshwater lakes and
reservoirs.
OBJECTIVES
The Survey was designed to develop, in conjunction with state
environmental agencies, information on nutrient sources, concen-
trations, and impact on selected freshwater lakes as a basis for
formulating comprehensive and coordinated national, regional, and
state management practices relating to point source discharge
reduction and nonpoint source pollution abatement 1n lake water-
sheds.
ANALYTIC APPROACH
The mathematical and statistical procedures selected for the
Survey's eutrophication analysis are based on related concepts
that:
a. A generalized representation or model relating
sources, concentrations, and Impacts can be
constructed.
b. By applying measurements of relevant parameters
associated with lake degradation, the generalized
model can be transformed into an operational
representation of a lake, Its drainage basin, and
related nutrients.
c. With such a transformation, an assessment of the
potential for eutrophicatlon control can be made.
LAKE ANALYSIS
In this report, the first stage of evaluation of lake and
watershed data collected from the study lake and its drainage
basin is documented. The report is formatted to provide state
environmental agencies with specific information for basin
planning [§303(e)], water quality criteria/standards review
[§303(c)], clean lakes [§314(a,bj], and water quality monitoring
[§106 and §305(b)] activities mandated by the Federal Water
Pollution Control Act Amendments of 1972.
-------
Ill
Beyond the single lake analysis, broader based correlations
between nutrient concentrations (and loading) and trophic condition
are being made to advance the rationale and data base for refine-
ment of nutrient water quality criteria for the Nation's freshwater
lakes. Likewise, multivariate evaluations for the relationships
between land use, nutrient export, and trophic condition, by lake
class or use, are being developed to assist in the formulation of
planning guidelines and policies by the U.S. Environmental Protection
Agency and to augment plans implementation by the states.
ACKNOWLEDGMENTS
The staff of the National Eutrophication Survey (Office of
Research and Development, U.S. Environmental Protection Agency)
expresses sincere appreciation to the Washington Department of
Ecology for professional involvement, to the Washington National
Guard for conducting the tributary sampling phase of the Survey,
and to those Washington wastewater treatment plant operators who
provided effluent samples and flow data.
Ms. Barbara Blau, Lake Restoration Program, and the staff
of the Washington Department of Ecology, Lake Restoration Program,
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.
Major General Howard S. McGee, Adjutant General of Washington,
and Project Officer Colonel Clinton C. Johnson, who directed the
volunteer efforts of the Washington National Guardsmen, are also
gratefully acknowledged for their assistance to the Survey.
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IV
LAKE NAME
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF WASHINGTON
American Lake
Banks Lake
Chelan Lake
Diamond Lake
Green Lake
Keechelus Lake
Mayfield Lake
Medical Lake
Moses Lake
Ozette Lake
Sammamish Lake
Lake Whatcom
Lower Granite Reservoir
COUNTY
Pierce
Grant, Douglas
Chelan
Pend Oreilie
King
Kittitas
Lewis
Spokane
Grant
Clallam
King
Whatcom
Garfield, Whatcom
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B Wash.
t
Map Location,
FORT
LEWIS
AMERICAN LAKE
0 Tributary Sampling Site
X Lake Sampling Site
Sequalitchew
Lake
Mount Rainier
Ordnance Depot
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REPORT ON AMERICAN LAKE, WASHINGTON
STORET NO. 5301
I. CONCLUSIONS
A. Trophic Condition:*
Survey data indicate that American Lake is mesotrophic.
Chlorophyll a_ values in the lake ranged from 0.3 yg/1 in April
to 19.8 yg/1 in October with a mean of 4.8 yg/1. Potentials
for primary production as measured by algal assay control
yields were moderate to high. Lake transparency was good. Of
the 13 Washington lakes sampled in 1975, 3 had higher median
total phosphorus levels (0.027 mg/1), 6 had higher median
inorganic nitrogen levels (0.105 mg/1), and 7 had higher median
orthophosphorus values (0.007 mg/1) than American Lake.
Survey limnologists did not report any problem algal
blooms or aquatic macrophytes in the lake during the sampling
year. However, Ketelle and Uttormark (1971) report the
occurrence of nuisance algal blooms in the lake for which
regular chemical treatments are applied.
*See Appendix E.
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B. Rate-Limiting Nutrient:
The algal assay results indicate that American Lake was
primarily limited by phosphorus during the spring sampling (04/01/75)
and nitrogen during the fall sampling (10/29/75). The lake data
suggest phosphorus limitation in the spring and nitrogen limitation
during summer and fall.
C. Nutrient Controllability:
1. Point sources -
There were no known municipal or industrial point sources
impacting American Lake during the sampling year. Septic tanks,
however, were estimated to contribute 7.3% of the total phos-
phorus loading to the lake.
2
The calculated annual phosphorus loading of 0.10 g P/m /yr
is less than that proposed by Vollenweider (1975) as a "eutrophic"
loading but greater than his proposed "oligotrophic" loading.
Ceilings (1973) reports that nutrient accumulation in the lake
is reduced because of flushing action from surface- and ground-
water discharges. However, the lake receives heavy recreational
use (Bortleson, et al., 1976) and possibly substantial runoff
from surrounding urban areas, so should be watched carefully
for any future indications of overenrichment.
-------
2. Nonpoint sources -
Murray Creek contributed 35.4% of the total phosphorus
input to American Lake during the sampling year. Ungaged
tributaries were estimated to have contributed 40.6% of the
total phosphorus load.
There is no natural outlet to American Lake, although
a culvert for flood protection has been installed which
periodically overflows into Sequalitchew Creek (Bortleson,
et al., 1976; Collings, 1973). Since information on the
nutrient outflow from the lake is not available, the net
annual nutrient accumulation in the lake cannot be determined
in this report. Additional sampling is needed to determine
the true nutrient budget for American Lake before recommen-
dations in controllability can be proposed.
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II. LAKE AND DRAINAGE BASIN CHARACTERISTICS
Lake and drainage basin characteristics are itemized below.
Lake inorphometry data were provided by Wolcott (1965). Tributary
flow data were provided by the Washington District Office of the
U.S. Geological Survey (USGS). Outlet drainage area includes the
lake surface area. Mean hydraulic retention time was obtained
by dividing the'lake volume by mean flow of the outlet. Pre-
cipitation values are estimated by methods as outlined in National
Eutrophication Survey (NES) Working Paper No. 175. A table of
metric/English conversions is included as Appendix A.
A. Lake morphometry:
2
1. Surface area: 4.70 km .
2. Mean depth: 15.4 meters.
3. Maximum depth: 27.4 meters.
4. Volume: 72.279 x 105 m3.
5. Mean hydraulic retention time: 13,943 days (38.2 yrs).
-------
B. Tributary and Outlet:
(See Appendix B for flow data)
1. Tributaries -
Drainage Mean flow
Name area (km2) (m3/sec)
B-l Murray Creek 28.2 0.16
Minor tributaries and
immediate drainage - 32.9 0.00
Totals 61.1 0.16
2. Outlet - A-l Sequalitchew Creek 65.8 0.06
C. Precipitation:
1. Year of sampling: 109.1 cm.
2. Mean annual: 93.7 cm.
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III. LAKE WATER QUALITY SUMMARY
American Lake was sampled three times during the open-water
season of 1975 by means of a pontoon-equipped Huey helicopter. Each
time, samples for physical and chemical parameters were collected
from three stations on the lake and from a number of depths at each
station (see map, page v). During each visit, depth-integrated
samples were collected from each station for chlorophyll a_ analysis
and phytoplankton identification and enumeration. During the first
and last visits, 18.9-liter depth-integrated samples were composited
for algal assays. Maximum depths sampled were 7.9 meters at Station
01, 18.3 meters at Station 02, and 27.4 meters at Station 03. For
a more detailed explanation of NES methods, see NES Working Paper
No. 175.
The results obtained are presented in full in Appendix C and
are summarized in III-A for waters at the surface and at the maximum
depth for each site. Results of the phytoplankton counts and
chlorophyll ^determinations are included in III-B. Results of the
limiting nutrient study are presented in III-C.
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AMERICAN LAKE
STO&ET CODE
PARAMETER
( 4/ 1/75 )
RANGE
MEDIAN
PHYSICAL AND CHEMICAL CHARACTERISTICS
( 7/17/75 )
MAX
DEPTH S'«» = 3 DEPTH
RANGE RANGE
(METERS) N' RANGE MEDIAN (METERS)
N«
( 10/29/75 >
MAX
S'»s = 3 DEPTH
RANGE
RANGE MEDIAN (METERS)
TEMPERATURE (DEG CENT)
0.-1.5 M DEPTH
MAX DEPTH«»
DISSOLVED OXYGEN
O.-l.S M DEPTH
MAX OEPTH»«
5
3
(MG/L)
5
3
9.4-
9.4-
10.8-
10.2-
9.7
9.0
12.4
12.4
9.3
9.0
11.8
11.0
0.0-
7.9-
0.0-
7.9-
1.5
27.4
1.5
27.4
6
3
6
3
19.1- 19.8
7.4- 13.3
9.8- 10.8
8.0- 10.0
19.5
7.5
10.1
8.8
0.0- 1.5
7.3- 21.9
0.0- 1.5
7.3- 21.9
6
3
IS
3
14.0- 14.1
11.1- 14.0
9.0- 9.B
0.0- 9.4
14.1
11.4
9.2
0.4
0.0- 1.5
7.3- 23.5
0.0- 1.5
7.3- 23.5
CONDUCTIVITY (tJMHOS)
O.-l.S M DEPTH
MAX DEPTH"
5
3
66.-
66.-
70.
70.
6fl.
68.
0.0-
7.9-
1.5
27.4
6
3
104.- 117.
81.- 93.
111.
84.
0.0- 1.5
7.3- 21.9
6
3
67.- 69.
67.- 75.
69.
71.
0.0- 1.5
7.3- 23.5
PH (STANDARD UNITS)
O.-l.s V! DEPTH
MAX DEPTH'S
TOTAL ALKALINITY
O.-l.S M DEPTH
MAX DEPTH"
TOTAL P (MG/L)
O.-l.S M DEPTH
MAX DEPTH'S
DISSOLVED OPTHO P
O.-l.S M OEPTH
MAX DEPTH"
NOP+N03 (MG/L)
O.-l.S M DEPTH
MAX DEPTH"
AMMONIA (MG/L)
O.-l.S M DEPTH
MAX DEPTH'S
KJELDAHL M (MG/L)
O.-l.S M DEPTH
MAX DEPTH"
S
3
(MG/L)
5
3
S
3
(MG/L)
5
3
S
3
5
3
S
3
7.3-
7.0-
35.-
35.-
0.021-0
0.037-0
0.003-0
0.007-0
0.080-0
0.070-0
0.020-0
0.040-0
0.300-0
0.300-0
3.0
7.6
41.
39.
.030
.048
.009
.008
.100
.100
.050
.070
.400
.600
7.8
7.5
36.
3«.
0.0?7
0.044
0.006
0.007
0.100
0.090
0.040
o.oso
0.300
0.400
0.0-
7.9-
0.0-
7.9-
0.0-
7.9-
0.0-
7.9-
0.0-
7.9-
0.0-
7.9-
0.0-
7.9-
1.5
27.4
1.5
27.4
1.5
27.4
1.5
27.4
1.5
27.4
1.5
27.4
1.5
27.4
6
3
6
3
6
3
6
3
6
3
ft
3
6
3
8.6- 9.0
6.9- 7.4
39.- 49.
39.- 55.
0.015-0.023
0.016-0.084
0.006-0.021
0.015-0.072
0.020-0.050
0.020-0.150
0.030-0.060
0.030-0.230
0.300-1.000
0.300-0.600
8.6
7.4
46.
49.
0.017
0.084
0.010
0.016
0.020
0.040
0.040
0.040
0.500
0.600
0.0- 1.5
7.3- 21.9
0.0- 1.5
7.3- 21.9
0.0- 1.5
7.3- 21.9
0.0- 1.5
7.3- 21.9
0.0- 1.5
7.3- 21.9
0.0- 1.5
7.3- 21.9
0.0- 1.5
7.3- 21.9
6
3
6
3
6
3
6
3
6
3
6
3
6
3
6.7- 7.2
6.6- 7.2
41.- 43.
41.- 45.
0.021-0.075
0.086-0.306
0.002-0,031
0.027-0.167
0.020-0.020
0.020-0.020
0.020-0.050
0.040-0.910
0.200-0.300
0.500-2.100
7.1
6.6
41.
42.
0.026.
0.221
0.007
0.108
0.020
0.020
0.020
0.560
0.200
1.000
0.0- 1.5
7.3- 23.5
0.0- 1.5
7.3- 23.5
0.0- 1.5
7.3- 23.5
0.0- 1.5
7.3- 23.5
0.0- 1.5
7.3- 23.5
0.0- 1.5
7.3- 23.5
0.0- 1.5
7.3- 23.5
SECCHI DISC
0 ootnto-ot
3.7- 5.2
3.7
3.4- 4.1
4.0
» N = NO. OF SAMPLFS
»» MAXIMUM DEPTH SAMPLED AT EACH SITE
»«o s = NO. OF SITES SAMPLED ON THIS DATE
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8
B. Biological Characteristics:
1. Phytoplankton -
Sampling
Date
04/01/75
07/17/75
10/29/75
Dominant
Genera
1. Fragilaria
2. Chroomonas
3. Melosira
4. Cryptomonas
5. Stephanodiscus
Other genera
Total
1.
2.
3.
4.
5.
Cyclotella
Chroomonas
Melosira
Oocystis
Ankistrodesmus
1.
2.
3.
4.
5.
Other genera
Total
Aphanocapsa
Fragilaria
Chroomonas
Asterionella
Cryptomonas
Other genera
Total
Algal
Units
per ml
435
373
373
155
93
124
1,553
529
511
91
73
55
220
1,479
555
321
263
175
117
351
1,782
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2. Chlorophyll a_ -
Sampling Station Chlorophyll a_
Date Number (yg/1)
04/01/75 01 0.3
02 0.3
03 0.3
07/17/75 01 3.5
02 4.5
03 6.8
10/29/75 01 19.8
02 2.6
03 5.3
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10
C. Limiting Nutrient Study:
1. Autoclaved, filtered and nutrient spiked -
a. 04/01/75
Ortho P Inorganic N
Spike (rng/1) Cone, (mg/1) Cone, (tng/1)
Control 0.005
0.05 P 0.055
0.05 P + 1.0 N 0.055
1.00 N 0.005
b. 10/29/75
Spike (mg/1)
Control
0.05 P
0.05 P + 1.0 N
1.00 N
Ortho P
Cone, (mg/1)
0.040
0.090
0.090
0.040
0.093
0.093
1.093
1.093
Inorganic N
Cone, (mg/1)
0.080
0.080
1.080
1.080
Maximum Yield
(mg/1-dry wt.)
0.7
4.7
22.7
0.6
Maximum Yield
(mg/1-dry wt.)
5.3
5.1
33.3
21.3
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11
2. Discussion -
The control yield of the assay alga, Selenastrum capri-
cornutum, indicates that the potential for primary productivity
of American Lake was moderate during spring sampling (04/01/75)
and high during the autumn sampling (10/29/75). In the April
assay a significant increase in yield over that of the control
occurred when phosphorus alone was added, indicating phosphorus
limitation. In the October sample, the addition of nitrogen alone
produced a significant increase in yield beyond that of the control,
indicating nitrogen limitation at that time. In both samples the
maximum increase in yield beyond that of the control was produced
by the addition of nitrogen and phosphorus simultaneously.
The mean inorganic nitrogen to orthophosphorus (N/P) ratios in
the lake data were approximately 22/1, 7/1, and 5/1 in the spring,
summer, and fall respectively, suggesting phosphorus limitation in
the spring and nitrogen limitation in the summer and fall (a mean
N/P ratio of 14/1 or greater generally reflects phosphorus limitation),
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12
IV. NUTRIENT LOADINGS
(See Appendix D for data)
For the determination of nutrient loadings, the Washington
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 month of March when two samples were collected.
Sampling was begun in September 1974, and was completed in July 1975.
Through an interagency agreement, stream flow estimates for
the year of sampling and a "normalized" or average year were provided
by the Washington District Office of the USGS for the tributary sites
nearest the lake.
In this report, nutrient loads for sampled tributaries were
determined by using a modification of a USGS computer program for
calculating stream loadings. Nutrient loads indicated for tributaries
are those measured minus known point source loads, if any.
Nutrient loadings for unsampled "minor tributaries and immediate
drainage" ("ZZ" of USGS) were estimated by using the mean annual
2
nutrient loads, in kg/km /year in Murray Creek, at Station B-l, and
2
multiplying the means by the ZZ area in km .
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13
A. Waste Sources:
1. Known municipal - None
2. Known industrial - None
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
% of
Source kg P/yr total
a. Tributaries (nonpoint load) -
B-l Murray Creek 170 35.4
b. Minor tributaries and immediate
drainage (nonpoint load) - 195 40.6
c. Known municipal STP's - None
d. Septic tanks* 35 7.3
e. Known industrial - None
f. Direct precipitation** - 80 16.7
Totals 480 100.0
2. Output - A-l Sequalitchew Creek - Unknown
*Estimate based on 125 lakeshore residences.
**Estimated (See NES Working Paper No. 175).
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14
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
% of
Source kg N/yr total
a. Tributaries (nonpoint load) -
B-l Murray Creek 3,580 25.2
b. Minor tributaries and immediate
drainage (nonpoint load) - 4,180 29.5
c. Known municipal STP's - None
d. Septic tanks* - 1,330 9.6
e. Known industrial - None
f. Direct precipitation** - 5.075 35.7
Totals 14,165 100.0
2. Output - A-l Sequalitchew Creek - Unknown
D. Mean Annual Nonpoint Nutrient Export by Subdrainage Area:
2 2
Tributary kg P/km /yr kg N/km /yr
Murray Creek 6 127
*Estimate based on 125 lakeshore residences.
**Estimated (See NES Working Paper No. 175).
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15
E. Yearly Loadings:
In the following table, the existing phosphorus annual
loading is compared to the relationship proposed by Vollenweider
(1975). Essentially, his "eutrophic" loading is that at which the
receiving waters would become eutrophic or remain eutrophic; his
"oligotrophic" loading is that which would result in the receiving
water remaining oligotrophic or becoming oligotrophic if morphometry
permitted. A "mesotrophic" loading would be considered one between
"eutrophic" and "oligotrophic".
Note that Vollenweider's model may not apply to lakes with
short hydraulic retention times or in which light penetration is
severely restricted by high concentrations of suspended solids in
the surface waters.
Total Yearly
Phosphorus Loading
(g/m2/yr)
Estimated loading for American Lake 0.10
Vollenweider's "eutrophic" loading 0.13
Vollenweider's "oligotrophic" loading 0.06
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16
V. LITERATURE REVIEWED
Bortleson, G.C., N.P. Dion, J.B. McConnell, and L.M. Nelson. 1976.
Reconnaissance Data on Lakes in Washington, Volume 3. (Kitsap,
Mason and Pierce Counties). Washington State Department of Ecology
Water Supply Bulletin 43, Volume 3.
Col lings, M.R. 1973. Data on Selected Lakes in Washington, Part I.
USGS in cooperation with the Washington State Department of Ecology,
Tacoma, Washington.
Ketelle, Martha J. and Uttormark, Paul D. 1971. Problem Lakes in
the United States. U.S. Environmental Protection Agency Project
#16010EHR. University of Wisconsin, Madison, Wisconsin.
U.S. Environmental Protection Agency. 1975. National Eutrophica-
tion Survey Methods 1973-1976. Working Paper No. 175. National
Environmental Research Center, Las Vegas, Nevada, and Pacific
Northwest Environmental Research Laboratory, Corvallis, Oregon.
Vollenweider, R.A. 1975. Input-Output Models With Special
Reference to the Phosphorus Loading Concept in Limnology.
Schweiz. Z. Hydro!. 37:53-84.
Wolcott, E.E. 1965. Lakes of Washington, Volume I. Washington
Division of Water Resources, Water Supply Bulletin, 14 and 15.
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17
VI. APPENDICES
APPENDIX A
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 = 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 B
TRIBUTARY FLOW DATA
-------
TRIBUTARY FLOW INFORMATION FOP WASHINGTON
11/16/76
LAKE CODE 5301
AMERICAN LAKE
TOTAL DRAINAGE AREA OF LAKFCSG KM)
SUB-DRAINAGE
65.8
TRIBUTARY AREAtSQ KM)
JAN
FEB
5301A1
5301B1
53017?
65.8
2B.2
37.6
0.0 0.14?
0.204 0.311
0.0 0.0
MAR
0.283
0.368
0.0
APR
0.383
0.311
0.0
MAY
0.02R
0.861
0.0
NORMALIZED FLO«IS
-------
APPENDIX C
PHYSICAL AND CHEMICAL DATA
-------
STORET RETRIEVAL DATE 76/11/16
NATL FUTROPHICATION S'JRVEY
EPA-LAS VFGAS
00010
DATE TIME DEPTH
FROM OF
TO DAY FEET
75/04/01 12 00 0000
12 00 0005
12 00 0015
12 00 0026
75/07/17 15 05 0000
15 05 0005
15 05 0015
15 05 0024
75/10/29 15 05 0000
15 05 0005
15 05 0024
TtMP
CENT
9.7
9.7
9.5
9.0
19.5
19.5
19.1
13.3
14.0
14.0
14.0
00665
DATE TIME DEPTH PHOS-TOT
FROM OF
TO DAY FEET MG/L P
75/04/01 12 00 0000 0.027
12 00 0005 0.021
12 00 0015 0.022
12 00 002
-------
STORET RETRIEVAL DATF 76/11/16
NATL EUTROPHICATION SUPVEY
EPA-I.AS VEGAS
DATE TI^E DEPTH
FPO« OF
TO OAf FEET
75/04/01
75/07/17
75/10/39
13 40
1? 40
12 40
12 40
12 40
12 40
IS 25
15 25
15 25
15 25
15 25
15 25
14 50
14 50
14 50
14 50
0000
0005
0015
0030
0045
0060
0000
0005
0015
0025
0045
OOSB
000"
0005
0025
0057
DATE TIME DEPP
FROM OF
TO OAV FEET
00010
*ATEP
TEMP
CENT
9.4
9.5
9.4
8.8
8.6
8.4
19.1
19.3
18.7
14.5
7.7
7.4
14.1
14.1
14.1
11.4
00665
HOS-TOT
MG/L P
00300
DO
MG/L
12.4
12.4
12.2
12.0
11.4
11.0
9.8
10.2
10.2
10.0
4.6
10.0
9.0
9.0
9.0
0.4
32217
CHLRPHYL
A
UG/L
00077
TRANSP
SECCHI
INCHES
144
156
00031
INCDT LT
PFMNING
PERCENT
00094
CNDUCTVY
FIELD
MICROMHO
68
67
57
66
64
70
110
104
95
88
80
84
69
69
69
67
75/04/01
75/07/17
75/10/29
12
12
12
12
12
12
15
15
15
15
15
15
14
14
14
14
40
40
40
40
40
40
25
25
25
25
25
25
50
50
50
50
0000
0005
0015
0030
0045
0060
0000
0005
0015
0025
0045
005*
0000
0005
0025
0057
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
.030
.027
.02fl
.045
.103
.037
.023
.017
.020
.027
.032
.016
.025
.021
.030
.221
0.3
4.5
2.6
530102
47 07 36.0 122 34 03.0
AMERICAN LAKE
53053 WASHINGTON
131191
IIEP/LLES
0065 FEET
68
67
57
66
64
70
110
104
95
88
80
84
69
69
69
67
7.95
7.80
7.70
7.80
7.50
7.50
8.65
9.00
8.80
B.40
7.40
7.40
7.20
7.20
7.20
6.80
2111302
DEMTH CLASS 00
) 00610 00625 00630 00671
NH3-N TOT KJEL N025.N03 PHOS-DIS
TOTAL N N-TOTAL ORTHO
MG/L MG/L MG/L MG/L P
35
36
35
37
38
39
46
45
41
40
42
39
41
41
39
41
0.020K
0.050
0.050
0.020
0.030
0.050
0.050
0.030
0.030
0.050
0.070
0.030
0.020K
0.020K
0.020K
0.560
0.300
0.400
0.300
0.300
1.000
0.400
0.800
0.400
0.400
0.600
0.300
0.300
0.200
0.200*
0.200
1.000
0.100
0.100
0.100
0.090
0.090
0.090
0.030
0.020
0.020K
0.020
0.240
0.040
0.020K
0.020K
0.020K
0.020K
0.003
0.009
0.007
0.004
0.005
0.007
0.00*
0.013
0.01^
0^017
0.00*
0.01
-------
STORE! RETRIEVAL DATE 76/11/16
NATL FUTROPHITATION
EPA-LAS VEGAS
530103
47 08 02.0 122 33 15.0 3
AMERICAN LAKF
53053 WASHINGTON
131191
11EPALES 2111202
0094 FEET DEPTH CLASS 00
DATE
FOO"
TO
75/04/01
^
75/07/17
75/10/29
00010
TI«E DEPTH WATER
OF TEMP
DAY FEET
13
13
13
13
13
13
15
15
15
15
15
15
14
14
14
14
14
15
IS
15
15
15
15
50
50
50
50
50
50
30
30
30
30
30
ooon
0015
003P
0050
0070
0090
0000
0005
0020
0030
0041
007?
0000
0005
0020
005"
0077
CENT
9.4
9.0
8.7
8.6
8.5
9.0
19.8
19.8
17.9
12.9
8.3
7.5
14.1
14.1
14.2
11.9
11.1
00300 00077 00094
DO TRANSP CNDUCTVY
SECCHI FIELD
MG/L INCHES MICROMHO
11.8
12.4
11.8
11.8
11.6
12.4
10.0
10.4
11.4
9.6
2.0
8.8
9.2
9.2
9.2
0.8
0.0
66
67
67
66
68
68
144 117
112
102
89
83
81
163 69
67
67
65
71
00400 00410
PH T ALK
CAC03
su
n.oo
7.70
7.55
7.70
7.60
7.65
8.60
8.65
8.90
7.80
7.10
6.90
7.00
7.20
7.30
6.90
6.65
MG/L
41
39
41
40
40
38
39
40
38
39
41
49
41
41
43
45
45
00610 00625 00630 00671
NH3-N TOT KJEL N02(vNO3 PHOS-DIS
TOTAL N N-TOTAL ORTHO
MG/L
0.020K
0.050
0.030
0.050
0.070
0.070
0.040
0.030
0.040
0.060
0.1*0
0.230
0.020K
0.020K
0.020K
0.340
0.910
MG/L
0.300
0.400
0.400
0.400
0.500
0.600
0.600
0.300
0.300
0.500
0.600
0.600
0.200
0.200
0.300
0.600
2.100
MG/L
0.100
0.110
0.100
0.100
0.100
0.100
0.020
0.020K
0.020
0.020K
0.200
0.150
0.020K
0.020K
0.020K
0.020K
0.020K
MG/L P
0.003
O.OOS
0.00*
0.006
0.006
0.007
0.007
0.015
0.014
0.00**
0.037
0.072
0.004
0.00?
0.003
0.076
0.1S7
00665
DATE TIME DEPTH PHOS-TOT
FROM OF
TO DAv FEET MG/L P
75/04/01
75/07/17
75/10/29
13
13
13
13
13
13
15
15
15
15
15
15
14
14
14
14
14
15
15
15
IS
15
15
50
50
50
50
50
50
30
30
30
30
30
0000
0015
0030
0050
0070
0090
0000
0005
0020
0030
0040
0072
0000
ono^
oo?r>
0050
0077
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
.023
.025
.020
.035
.034
.044
.018
.015
.020
.041
.049
.084
.027
.021
.»21
.100
.306
32217
CHLRPHYL
A
UG/L
0.3
6.8
5.3
00031
IMCDT LT
REMNING
PERCENT
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
APPENDIX D
TRIBUTARY AND WASTEWATER
TREATMENT PLANT DATA
-------
RETRIEVAL DATE 76/11/16
NATL FUTPOPHICATIOM
EPA- LAS
DATE TIME DEPTw
FROM OF
TO DAY FEET
74/12/16 17 on
75/03/04 20 30
75/03/13 17 31
75/05/17 11 30
75/05/20 09 ?0
5301A1
47 06 £5.0 122 35 25.0 4
SEOUALICHEW CREEK
53 7.5 FORT LEWIS
O/AMERICAM LAKE mi^i
SMPL AT PHIM BRDG .6 MI NW OF jCT W US
11EPALES ?111204
0000 FEET DEPTH CLASS 00
0 0 6 .1 0
NO?^N03
N-TDTAL
MG/L
0.024
0.032
0.030
0.120
0.005
00625
TOT KJEL
N
MG/L
0.100
0.700
0.300
0.300
0.050K
00610
MH3-N
TOTAL
MG/L
0.030
0.024
0.025
0.040
0.020
00671
PHOS-DIS
ORTHO
MG/L P
0.020
0.008K
0.005K
0.015
0.005K
00665
PHOS-TOT
MG/L P
0.040
0.020
0.020
0.010K
0.010K
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STOPET RETRIEVAL DATE 76/11/16
NATL FUTPOPHICATIOM SURVEY
EPA- LAS VEGAS
DATE
FROM
TO
74/09/19
74/10/09
74/11/14
74/12/16
75/01/21
75/02/07
75/03/04
75/03/13
75/04/16
75/05/20
75/07/10
TIME
OF
OAY
14 20
17 15
19 on
17 00
17 30
16 on
20 30
17 30
09 00
09 30
07 30
FEET
00630
NO2K.N03
N-TOTAL
MG/L
0.080
0.032
0.144
0.208
0.400
0 . ?56
0.264
0.160
0.105
o.oeo
0.030
00625
TOT KJEL
N
MG/L
0.100K
0.400
0.700
0.400
0.100K
0.100
0.350
0.450
1.150
0.100
00610
NH3-N
TOTAL
MG/L
0.020
0.024
0.032
0.040
0.024
0.008
0.008K
0.020
0.015
0.020
0.055
00671
PHOS-DIS
ORTHO
MG/L P
0.005K
0.010
0.008
0.015
0.024
0.016
0.008
0.010
0.005
0.010
0.010
1 1EPALES
nooo FEET
00665
PHOS-TOT
MG/L P
0.010
0.030
0.070
0.024
0.020
0.020
0.020
0.010K
0.050K
0.010
5301B1
47 07 10.0 122 3* 00.0 4
MURRAY CREEK
53 7.5 PORT LFWIS
T/AMEPICAN LAKE 1311
-------
APPENDIX E
PARAMETRIC RANKINGS OF LAKES
SAMPLED BY NES IN 1975
STATE OF WASHINGTON
Mean or median values for six of the key parameters evaluated
in establishing the trophic conditions of Washington lakes sampled
are presented to allow direct comparison of the ranking, by parameter,
of each lake relative to the others. Median total phosphorus, median
inorganic nitrogen and median dissolved orthophosphorus levels are
expressed in mg/1. Chlorophyll a_ values are expressed in yg/1.
To maintain consistent rank order with the preceding parameters,
the mean Secchi disc depth, in inches, is subtracted from 500.
Similarly, minimum dissolved oxygen values are subtracted from 15
to create table entries.
-------
LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
5301 AMERICAN LAKE
5302 BANKS LAKE
5303 CHELAN LAKE
5304 DIAMOND LAKE
5305 GREEN LAKE
5306 KEECHELUS LAKE
5307 MAYFIELD LAKE
5308 MEDICAL LAKE
5309 MOSES LAKF
5310 07ETTE LAKE
5311 SAMMAMISH LAKE
531? WHATCOM LAKE
5313 LOWER GRANITE RESERVOIR
MEDIAN
TOTAL P
0.027
0.021
0.005
0.01*
0.027
0.007 '
0.014
0.275
0.115
0.010
0.015
0;009
0-.033
MEDIAN
INORG N
0.105
0.040
0.070
0.060
0.050
0.040
0.100
0.225
0.150
0.110
0.210
0.320
0.150
500-
MEAN SEC
343.000
364.533
111.900
303.667
415.000
280.250
402.000
401.714
463.600
403.333
374.000
288.000
435.500
MEAN
CHLORA
4.822
7.373 ,
0.905
14.537
2.983
1.400
4.250
16.425
29.060
1.225
7.290
3.422
4.875
15-
MIN DO
15.000
10.800
6.400
14.200
10.600
9.200
10.600
15.000
14.600
7.200
14.600
10.HOO
7.200
MEOI
DISS ORTi
0.007
0.007
0.003
0.010
0.009
0.00?
0.007
0.166
0.038
0.009
0.006
0.009
0.022
-------
PERCENT OF LAKES *ITH HIGHER VALUES (NUMBER OF LAKES WITH HIGHER VALUES)
LAKE
CODE LAKE NAME
5301 AMERICAN LAKE
5302 BANKS LAKE
5303 CHELAN LAKE
5304 DIAMOND LAKE
5305 GREFN LAKE
5306 KEECHELUS LAKE
5307 MAYFIELO LAKE
5309 MEDICAL LAKE
5309 MOSES LAKE
5310 07ETTE LAKE
5311 SAMMAMISH LAKE
5312 WHATCOM LAKE
5313 LOWER GRANITE RESERVOIR
MEDIAN
TOTAL P
29 I
42 1
100 (
6? 1
29 i
92
62 i
0 i
8 i
75
50
83
17
1 3)
! 5)
[ 12)
I 7)
( 3)
t 11)
( 7)
I 0)
( 1)
f 9)
( 6)
( 10)
( 2)
MEDIAN
INORG N
. 50 <
100 (
67 (
75 (
83 (
92 (
58 (
8 (
29 <
42 (
17 (
0 .(
29 (
6)
12)
8)
9)
10)
11)
7)
1)
3)
5)
2)
0)
3)
500-
MEAN SEC
67 (
58 1
100 (
75 <
17 1
92 <
33 1
42 1
0 1
25 1
50 i
«3 i
8 '
: 8)
! 7)
: 12)
: 9>
1 2)
[ 11)
[ 4)
[ 5)
! 0)
I 3)
: 6)
! 10)
( 1)
MEAN
CHLORA
50 (
25 <
100 <
17 (
75 1
83 1
58 1
8 1
0 1
92 <
33 i
67 i
42 i
! 6)
: 3)
: 12)
; 2)
[ 9)
I 10)
[ 7)
: i)
! 0)
t 11)
[ 4)
[ 8) •
( 5)
15-
MIN DO
4 1
46 I
100 1
33 1
62 I
75 i
62 I
4 1
21 I
87 I
21
46
87
[ ,0)
I 5)
[ 12)
[ 4)
t 7)
1 9)
t 7)
I 0)
t 2)
[ 10)
( 2)
( 5)
( 10)
MEDIAN
DISS ORTHO
58 I
71 <
92 <
25 1
46 1
100 1
71 1
0 1
8 1
33 1
«3 i
46 1
17
: 7)
: «)
: in
! 3)
I 5)
: 12)
i P)
' o).
: i)
t 4)
t 10)
( 5)
f 2)
------- |