U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
LOCH RAVEN RESERVOIR
BALTIMORE COUNTY
MARYUWD
EPA REGION III
WORKING PAPER No, 358
PACIFIC NORTHWEST ENVIRONMENTAL RESEARCH LABORATORY
An Associate Laboratory of the
NATIONAL ENVIRONMENTAL RESEARCH CENTER - CORVALLIS, OREGON
and
NATIONAL ENVIRONMENTAL RESEARCH CENTER - LAS VEGAS, NEVADA
•frGPO 697-O32
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REPORT
ON
LOCH RAVEN RESERVOIR
BALTIMORE COUNTY
EPA REGION III
WORKING PAPER No, 358
WITH THE COOPERATION OF THE
MARYLAND DEPARTMENT OF NATURAL RESOURCES,
MARYLAND DEPARTMENT OF HEALTH AND MENTAL HYGIENE,
AND THE
MARYLAND NATIONAL GUARD
JUNE, 1975
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REPORT ON LOCH RAVEN RESERVOIR
BALTIMORE COUNTY, MARYLAND, EPA REGION III
by
National Eutrophication Survey
Water and Land Monitoring Branch
Monitoring Applications Laboratory
National Environmental Research Center
Las Vegas, Nevada
and
Eutrophication Survey Branch
Pacific Northwest Environmental Research Laboratory
National Environmental Research Center
Corvallis, Oregon
Working Paper No. 353
OFFICE OF RESEARCH AND DEVELOPMENT
U.S. ENVIRONMENTAL PROTECTION AGENCY
June 1975
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CONTENTS
Page
Foreword i i
List of Maryland 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 11
V. Literature Reviewed 16
VI. Appendices • : 17
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11
FOREWORD
The National Eutrophication Survey was initiated in 1972
in response to an Administration commitment to investigate the
nationwide 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 nonpoint 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
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
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iii
planning [§303(e)L water quality criteria/standards review
[§303(c)], clean lakes [§314(a,b)], and water quality monitoring
[§106 and §305(b)] activities mandated by the Federal Water
Pollution Control Act Amendments of 1972.
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
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 EPA
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 Maryland Department of Natural Resources and the
Maryland Department of Health and Mental Hygiene for professional involve-
ment and to .the Maryland National Guard for conducting the tributary
sampling phase of the Survey.
Paul W. Slunt, Chief, Water Quality Services, James T. Allison,
Natural Resources Manager, Water Quality Services, of the Maryland
Department of Natural Resources, and Earl S. Quance, Chief, Division
of Water and Sewerage, Maryland Department of Health and Mental Hygiene.
provided invaluable lake documentation and counsel during the course of
the Survey.
Major General Edwin Warfield III, the Adjutant General of Maryland,
and Project Officer Colonel Bernard Feingold, who directed the volunteer
efforts of the Maryland National Guardsmen, are also gratefully acknowl-
edged for their assistance to the Survey.
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IV
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF MARYLAND
LAKE NAME COUNTY
Deep Creek Lake Garrett
Liberty Reservoir Carroll, Baltimore
Loch Raven Reservoir Baltimore
Johnson Pond Wicomico
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LOCH RAVEN RESERVOIR
• ! Tributary Sampling Site
X 'Lake Sampling Site
' j Sewage Treatment Facility
[Drainage Area Boundary
? . •? , f .
5 4IM1.
flKm.
[Scale
Maryland jIlL
Map Location
70J45*
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LOCH RAVEN RESERVOIR
STORE! NO. 2408
I. CONCLUSIONS
A. Trophic Condition*:
Loch Raven Reservoir is classified as eutrophic based
upon survey data. Chlorophyll a_ levels and potential for
primary productivity as measured by algal assay control
yields were moderate, and oxygen depletion occurred below
6.1 meters during July and October. Nutrient concentrations
were low, and Secchi disc visibility ranged from a low of
0.5 meters in the spring to a high of 3.0 meters in the fall.
Survey limnologists did not report any nuisance conditions;
however, past studies (State of Maryland, 1970; Jansson and
Rudich, 1973) have reported algal blooms, suds from dairy
farm detergent usage and other problem conditions in tribu-
taries impacting the reservoir.
B. Rate-Limiting Nutrient:
Algal assay results indicate that Loch Raven Reservoir
was limited by available phosphorus levels. Spikes with
phosphorus, and nitrogen and phosphorus simultaneously result
in increases in assay yield. Additions of nitrogen alone did
not stimulate a growth response. The ratio of available
nitrogen to phosphorus in sampled waters substantiates phos-
phorus limitation..
* See Appendix E
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C. Nutrient Controllability:
1. Point Sources -
The mean annual phosphorus load from point sources
was estimated to be 28.7% of the total load reaching
Loch Raven Reservoir. The city of Manchester contributed
a total of 15.1% from two wastewater treatment plants,
and the city of Hampstead contributed 13.6%.
o
The present loading rate of 1.45 g/nr/yr is less
than that proposed by Vollenweider (in press) as "dangerous"
(eutrophic) for a lake of such volume and detention time,
but greater than the "permissible" (oligotrophic) rate.
Total elimination of the known point sources impacting the
reservoir would lower annual loading to the "permissible"
rate.
2. Nonpoint Sources -
The mean annual phosphorus load from nonpoint sources
was about 71.3% of the total reaching the lake. Measured
tributaries accounted for 64.9% of the total impacting
the lake, and ungaged tributaries accounted for 6.4%.
Numerous recommendations were made (State cf Maryland,
1970) by State officials to assure the continuation of ex-
isting water quality in Loch Raven Reservoir. Included in
these recommendations are a proposal for an intensive sani-
tary survey of all communities in the reservoir watershed
which are without public sewerage facilities, and a suggestion
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to amend the State Sediment Control Act to include agri-
cultural land management practices. At this time, it is
not known what action has been taken on these recommen-
dations.
-------
II. LAKE AND DRAINAGE BASIN CHARACTERISTICS
Lake and drainage basin characteristics are itemized below.
Lake morphometry was provided by the State of Maryland; tributary
data were provided by the Maryland 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. The outlet
data for normalized flow and daily and monthly flows for time
of sampling were divided into spillage and diversion segments.
The spillage and diversions were combined to determine total
outflow.
Tributary drainage areas plus the lake surface area do not
equal the outlet drainage area (probably) because of differences
in pool elevation used by the different sources in their calcu-
lations. Precipitation values are estimated by methods as out-
lined in National Eutrophication Survey (NES) Working Paper No.
175. A table of metric/English conversions is included as
Appendix D.
A. Lake Morphometry:
1. Surface area: 7.67 km2.
2. Mean depth: 15.2 meters.
3. Maximum depth: 21.3 meters.
4. Volume: 116.569 x 106 m3.
5. Mean hydraulic retention time: 146 days.
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B. Tributary and Outlet:
(See Appendix A for flow data)
1. Tributaries -
Drainage Mean flow
Name area(knr) (nr/sec)
A(2) Gunpowder Falls 466.2 5.53
B(l) Beaverdam Run 54.4 0.65
C(l) Western Run 163.7 1.76
D(l) Greene Branch 11.9 0.16
F(l) Dulaney Valley Branch 8.3 0.13
G(l) Fitzhugh Run 4.1 0.07
H(l) Unnamed Stream 3.6 0.04
J(l) Spring Branch 4.5 0.04
Minor tributaries &
immediate drainage 58.8 0.67
Totals 775.5 9.05
2. Outlet - A(l) Gunpowder Falls River 791.6 9.21
C. Precipitation:
1. Year of sampling: 105.4 centimeters.
2. Mean annual: 139.7 centimeters.
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III. LAKE WATER QUALITY SUMMARY
Loch Raven Reservoir was sampled three times during the open-
water season of 1973 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 ^analysis
and phytoplankton identification and enumeration. During the first
visit, 18.9-liter depth-integrated samples were composited for algal
assays. Maximum depths sampled were 21.6 meters at Station 1, 18.0
meters at Station 2, and 14.0 meters at Station 3. For a more
detailed explanation of NES methods, see NES Working Paper No. 175.
The results obtained are presented in full in Appendix B 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 a^ determinations are included in III B. Results of the
limiting study are presented in III C.
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PARAMETER
TEMP (C)
OISS OXY (MG/L)
CNDCTVY (MCROMO)
PH (STAND UNITS)
TOT ALK (MG/L)
TOT P (MG/L)
ORTHO P (MG/L)
N02»N03 (MG/L)
AMMONIA (MG/L)
KJEL N (MG/L)
INORG N (MG/L)
TOTAL N (MG/L)
CHLRPYL A (UG/D
SECCHI (METERS)
A. SUMMARY OF PHYSICAL AND
1ST SAMPLING ( 4/11/73)
3 SITES
RANGE
9.a -
10.0 -
130. - 150.
6.3 -
30. -
0.023 - 0.098
0.004 - 0.012
1.600 - 1.900
0.040 - 0.070
0.200 - 0.700
1.640 - 1.960
1.900 - 2.300
3.2 -
0.5 -
CHEMICAL CHARACTERISTICS FOR LOCH RAVEN RESERVOIR
STORET CODE 2408
2ND SAMPLING ( 7/21/73)
3 SITES
3RD SAMPLING (10/ 1/73)
3 SITES
0.6
0.8
50.
7.1
44.
098
012
900
,070
700
,960
300
6.1
0.9
MEAN
10.2
10.4
139.
6.7
38.
0.050
0.007
1.642
0.055
0.433
1.697
2.075
4.8
0.7
MEDIAN
10.2
10.4
140.
6.7
40.
0.042
0.005
1.600
0.060
0.400
1.660
2.050
5.1
0.9
RANGE
9.2
0.4
97.
6.6
23.
0.012
0.003
0.980
0.020
0.200
1.000
1.180
7.7
1.8
- 27.9
- 10.8
- 153.
9.2
49.
- 0.041
- 0.008
- 1.700
- 0.360
- 0.800
- 1.800
- 2.200
- 13.0
2.1
MEAN
21.0
5.1
129.
7.7
40.
0.019
0.006
1.341
0.089
0.507
1.429
1.848
11.0
2.0
MEDIAN
22.9 -
5.1
134.
7.1
40.
0.018
0.005
1.300
0.060
0.500
1.450
1.895
12.2
2.0
RANGE
9.4 -
0.2 -
107. -
6.6 -
39. -
0.016 -
0.006 -
0.060 -
O.OSO -
0.200 -
l.OSO -
1.140 -
5.1 -
2.1 -
€
21.6
8.6
141.
7.8
66.
0.089
0.012
1.300
1.430
1.500
1.490
1.810
6.0
3.0
MEAN
16.9
3.2
129.
7.0
46.
0.031
0.009
0.802
0.394
0.624
1.196
1.426
5.6
2.6
MEDIAN
18.3
0.8
131.
6.8
42.
0.024
0.008
0.940
0.200
O.SOO
1.130
1.410
5.8
2.7
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B. Biological characteristics:
1. Phytoplankton -
Sampling
Date
04/11/73
07/21/73
10/01/73
Algal
Dominant Units
Genera per ml
1. Flagellates 712
2. Fragilaria 597
3. Asterionella 394
4. Cryptomonas 140
5.. Oscillatoria 63
Other genera 204
Total 2,110
1. Fragilaria 3,fi59
2. Cyclotella 570
3. Melosira 480
4. Flagellates 210
5. Oocystis 180
Other genera 239
Total 5,338
1. Fragilaria 1,198
2. Melosira 480
3. Flagellates 189
4. Coelosphaerium 103
5. Stephanodiscus 69
Other genera 240
Total 2,279
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2. Chlorophyll a -
C.
Sampling
Date
04/11/73
07/21/73
10/01/73
Limiting Nutrient
1. Autoclaved,
Spike (mg/1)
Control
0.05 P
0.05 P + 1.0
1.00 N
Station
Number
1
2
3
1
2
3
1
2
3
Study:
filtered, and nutrient
Ortho P
Cone. (mg/1)
0.016
0.066
N 0.066
0.016
Chlorophyll a_
(micrograms/1)
6.1
5.1
3.2
13.0
12.2
7.7
6.0
5.8
5.1
spiked -
Inorganic N Maximum Yield
Cone. (mg/1) (mg/1 -dry wt.)
1.568 1.0
1.568 8.1
2.568 14.7
2.568 1.2
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10
2. Discussion -
The control yield of.the assay alga, Selanastrum
capricornutum, indicates that the potential for primary
production in Loch Raven Reservoir was moderately high
at the time of sampling. The increase in yield with the
addition of phosphorus indicates phosphorus limitation.
Spikes of nitrogen alone produced no positive
growth response. Maximum growth potential was achieved
with the simultaneous addition of both phosphorus and
nitrogen.
The ratio of inorganic nitrogen to dissolved
phosphorus was about 207:1 in the field samples for
Loch Raven Reservoir, indicating the lake was phosphorus
limited at the time of assay sample collection.
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11
IV. NUTRIENT LOADINGS
(See Appendix C for data)
For the determination of nutrient loadings, the Maryland
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 three samples were col-
lected. Sampling was begun in May 1973, and was completed in
May 1974.
Through an interagency agreement, stream flow estimates for
the year of sampling and a "normalized" or average year were pro-
vided by the Maryland 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 the 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" ("II" of USGS) were estimated by using the mean annual
concentrations in Beaverdam Run, Greene Branch, Dulaney Valley Branch,
Fitzhugh Run, Unnamed Stream, and Spring Branch at Station B(l), D(l),
F(l), 6(1), H(l), J(l), and mean annual II flow.
The operators of Hampstead, Manchester, and Dutterer's waste-
water treatment plants provided monthly effluent samples and
corresponding flow data.
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12
A. Waste Sources:
1. Known municipal -
Name
Hampstead
Manchester
Population
Served
3,000
1,000
Treatment
Activated
Sludge
Activated
Sludge
Mean Flow 0
(m3/d x 103)
0.757
O.*271
Receiving
Water
Piney Run,
Western Run
Georges Run,
Prettyboy
Reservoir,
Gunpowder Falls
2. Known industrial -
Name
Dutterer's
(Manchester)
Product
Meat
packing
Treatment
Activated
Sludge
Mean Flow
(m3/d x IP3)
0.114
Receiving
Water
Georges Run,
Prettyboy
Reservoir,
Gunpowder Falls
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13
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
% of
Source kg P/yr total
a. Tributaries (nonpoint load) -
A(2) Gunpowder Falls 4,385 39.5
B(l) Beaverdam Run 35° 3-l
C(l) Western Run 1>745 15-7
D(l) Greene Branch 90 °-8
F(l) Dulaney Valley Branch 40° 3-6
G(l) Fitzhugh Run 55 °-5
H(l) Unnamed Stream 35 °-3
J(l) Spring Branch 25 °-2
b. Minor tributaries & immediate
drainage (nonpoint load) - 715 6-4
c. Known municipal STP's -
Hampstead 1,510 13-6
Manchester 1,645 14.8
d. Septic tanks - Unknown
e. Known industrial -
Dutterer's (Manchester) 30 °-3
f. Direct precipitation* - 135 I-2
Total 11,120
2. Outputs - Gunpowder Falls River 7,775
3. Net annual P accumulation - 3,345 kg.
*Estimated.
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14
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
% of
Source kg N/yr total
a. Tributaries (nonpoint load) -
A(2) Gunpowder Falls 360,885 57.7
B(l) Beaverdam Run 41,535 6.6
C(l) Western Run 124,250 19.8
D(l) Greene Branch 12,110 1.9
F(l) Dulaney Valley Branch 13,360 2.1
G(l) Fitzhugh Run 4,970 0.8
H(l) Unnamed Stream 3,030 0.5
0(1) Spring Branch 2,400 0.4
b. Minor tributaries & immediate
drainage (nonpoint load) - 50,355 8.1
c. Known municipal STP's -
Hampstead 1,760 0.3
Manchester 2,540 0.4
d. Septic tanks - Unknown
e. Known industrial -
Dutterer's (Manchester) 370 0.1
f. Direct precipitation* - 8,280 1.3
Total 625,845 100.0
2. Outputs - Gunpowder Falls River 436,650
3. Net annual N accumulation - 189,195 kg.
*Estimated.
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15
D. Mean Annual Nonpoint Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr kg N/km2/yr
A(2) Gunpowder Falls 9 774
B(l) Beaverdam Run 6 763
0(1) Western Run 11 759
D(l) Greene Branch 8 1,018
F(l) Dulaney Valley Branch 48 1,610
G(l) Fitzhugh Run 13 1,212
H(l) Unnamed Stream 10 842
J(l) Spring Branch 6 533
E. Yearly Loading Rates:
In the following table, the existing phosphorus loading
rates are compared to those proposed by Vollenweider (in press).
Essentially, his "dangerous" rate is the rate at which the
receiving waters would become eutrophic or remain eutrophic; his
"permissible" rate is that which would result in the receiving
water remaining oligotrophic or becoming oligotrophic if mor-
phometry permitted. A mesotrophic rate would be considered one
between "dangerous" and "permissible".
Total Yearly
Phosphorus Loading Rate
(grams/m2/year
Estimated loading rate for Loch Raven Reservoir 1.45
Vollenweider's "dangerous" or eutrophic rate 2.10
Vollenweider's "permissible" or oligotrophic rate 1.05
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16
V. LITERATURE REVIEWED
Jansson, Erik and David Rudich. 1973. "Gunpowder Watershed
Pollution Abatement Study.11 Department of Natural
Resources. Annapolis, Maryland.
State of Maryland. 1970. "Loch Raven Reservoir Watershed
Sanitary Survey." Department of Health.
U.S. Environmental Protection Agency. 1975. "National
Eutrophication Survey Methods 1973-1976." Working
Paper No. 175. National Environmental Research Center,
Las Vegas, Nevada and Pacific Northwest Environmental
Research Laboratory, Con/all is, Oregon.
Vollenweider, Richard A. (in press). "Input-Output Models."
Schweiz Z. Hydrol.
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17
VI. APPENDICES
APPENDIX A.
TRIBUTARY FLOW DATA
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LAKE CODE 2408
TRIBUTARY FLOW INFORMATION FOR MARYLAND
LOCH RAVEN RESERVOIR
9/16/75
TOTAL DRAINAGE AREA OF LAKE(SO KM)
SUB-DRAINAGE
TRIBUTARY AREA(SO KM)
JAN
FEB
800.3
MAR
APR
MAY
NORMALIZED FLOWS(CMS)
JUN JUL AUG
SEP
OCT
NOV
SUMMARY
TOTAL DRAINAGE AREA OF LAKE
SUM OF SUB-DRAINAGE AREAS
NOTE ••• SEE WRITE-UP ON LOCH RAVEN RESERVOIR
MEAN MONTHLY FLOWS AND DAILY FLOWS
800.3
784.2
TOTAL FLOW IN
TOTAL FLOW OUT
109.57
111.37
TRIBUTARY MONTH YEAR
2408A1
MEAN FLOW DAY
FLOW DAY
FLOW DAY
FLOW
2408A2
5
6
7
8
9
10
11
12
1
2
3
5
6
7
8
9
10
11
12
1
2
3
73
73
73
73
73
73
73
73
74
74
74
73
73
73
73
73
73
73
73
74
74
74
13.39
7.73
2.21
0.65
0.08
0.07
0.07
6.68
5.18
1.76
4.47
10.02
7.31
4.73
4.67
4.50
4.93
3.57
9.91
4.73
2.94
4.22
12
9
14
11
9
14
10
9
12
8
2
0
0
0
0
9
14
10
9
12
8
2
8.50
8.21
0.16
0.10
0.06
0.07
0.07
0.27
9.66
2.10
0.82
0.0
0.0
0.0
0.0
2.35
2.32
1.30
19.82
6.12
4.05
3.11
13
10
13
10
1.42
1.08
17
0.82
2.80
2.75
DEC
MEAN
240 8A1
240 8 A2
2408B1
2408C1
240801
2408E1
2408F1
2408G1
2408H1
2408 Jl
240 8K1
2408ZZ
800.3
466.2
54.4
163.7
11.9
8.7
8.3
4.1
3.6
4.5
800.3
58.8
1.73
4.93
0.74
2.15
0.18
0.06
0.15
0.07
0.05
0.04
6.54
0.76
4.47
7.39
0.88
2.61
0.22
0.07
0.18
0.09
0.06
0.05
6.91
0.93
6.06
7.84
0.93
2.78
0.24
0.08
0.19
0.09
0.06
0.05
6.57
0.96
6.03
7.59
0.85
2.49
0.21
0.07
0.17
0.08
0.05
0.05
6.34
0.88
4.19
6.06
0.76
2.24
0.19
0.06
0.16
0.08
0.05
0.05
6.54
0.79
2.49
4.36
0.62
1.81
0.16
0.05
0.13
0.06
0.04
0.04
6.40
0.65
0.65
3.45
0.57
1.64
0.14
0.05
0.12
0.06
0.04
0.03
6.82
0.59
2.01
5.32
0.51
1.47
0.13
0.04
0.11
0.05
0.03
0.03
7.11
0.54
1.22
4.53
0.42
1.22
0.10
O.tf4
0.09
0.05
0.03
0.03
6.68
0.42
0.91
4.47
0.40
1.10
0.10
0.03
0.08
0.04
0.03
0.03
6.29
0.40
1.22
5.69
0.51
1.50
0.13
0.04
0.11
0.05
0.03
0.03
6.06
0.54
1.84
4.90
O.S9
0.18
0.15
0.05
0.13
0.06
0.04
0.04
6.29
0.62
2.72
5. S3
0.6S
1.76
0.16
0.05
0.13
0.07
0.04
0.04
6.54
0.67
17
3.45
-------
LAKE CODE 2408
TRIBUTARY FLOW INFORMATION FOR MARYLAND
LOCH RAVEN RESERVOIR
9/16/75
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY
2408B1
2408C1
2408D1
240BE 1
5
6
7
8
9
10
11
12
1
2
3
5
6
7
8
9
10
11
12
1
2
3
5
6
7
8
9
10
11
12
1
2
3
5
6
7
8
9
10
11
12
1
2
3
73
73
73
73
73
73
73
73
74
74
74
73
73
73
73
73
73
73
73
74
74
74
73
73
73
73
73
73
73
73
74
74
74
73
73
73
73
73
73
73
73
74
74
74
1.50
1.16
0.76
0.59
0.51
0.48
0.42
0.99
0.99
0.74
0.79
4.73
3.60
2.27
1.70
1.47
1.42
1.22
3.00
2.97
2.21
2.35
0.40
0.31
0.19
0.15
0.12
0.12
0.10
0.25
0.25
0.19
0.20
0.13
0.10
0.07
0.05
0.04
0.04
0.04
0.08
0.08
0.06
0.07
12
9
14
11
9
14
10
9
12
8
2
12
9
14
11
9
14
10
9
12
8
2
12
9
14
11
9
14
10
9
12
8
2
12
9
14
11
9
14
10
9
12
8
2
FLOW DAY
FLOW DAY
FLOW
1.16
1.13
0.71
0.62
0.37
0.40
0.42
1.67
1.36
0.79
0.65
3.60
3.48
2.10
1.84
1.05
1.13
1.16
5.38
4.25
2.38
1.93
0.31
0.28
0.18
0.16
0.09
0.10
0.10
0.45
0.37
0.20
0.16
0.10
0.10
0.06
0.05
0.03
0.03
0.03
0.14
0.12
0.07
0.06
13
10
13
10
13
10
13
10
0.79
0.65
17
0.65
2.32
1.93
17
1.93
0.20
0.16
17
0.16
0.07
0.06
17
0.06
-------
LAKE CODE 2408
TRIBUTARY FLOW INFORMATION FOR MARYLAND
LOCH RAVEN RESERVOIR
9/16/75
MEAN MONTHLY FLOWS AND DAILY FLOWS
-------
LAKE CODE 2408
TRIBUTARY FLOW INFORMATION FOR MARYLAND
LOCH RAVEN RESERVOIR
9/16/75
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY
2408K1
2408ZZ
MONTH YEAR
5
6
7
8
9
10
11
12
1
2
3
5
6
7
8
9
10
11
12
1
2
3
73
73
73
73
73
73
73
73
74
74
74
73
73
73
73
73
73
73
73
74
74
74
MEAN FLOW DAY
5.61
6.97
7.82
8.30
8.01
7.56
6.68
6.54
5.61
5.69
3.11
1.61
1.25
0.79
0.62
0.54
0.51
0.45
1.05
1.05
0.79
0.82
12
9
14
11
9
14
10
9
12
8
2
12
9
14
11
9
14
10
9
12
8
2
FLOW DAY
5.78
6.29
8.01
8.10
7.76
7.19
5.61
4.56
5.41
5.95
5.41
1.25
1.22
0.74
0.65
0.37
0.40
0.42
1.84
1.47
0.85
0.68
15
13
10
13
10
FLOW DAY
0.82
0.68
FLOW
5.41
5.97
5.15 17
5.35
17
0.68
-------
APPENDIX B
PHYSICAL and CHEMICAL DATA
-------
STORET RETRIEVAL DATE 75/09/16
2*0801
39 25 55.0 076 32 37.0
LOCH RAVEN RESERVOIR
24005 MARYLAND
00010
DATE TIME DEPTH WATER
FROM OF TEMP
TO DAY FEET CENT
73/04/11
73/07/21
73/10/01
11
11
11
11
13
13
13
13
13
13
13
13
13
13
13
13
50
50
50
50
25
25
25
25
25
25
15
15
15
15
15
15
0000
0004
0015
0025
0000
0005
0015
0025
0040
0065
0000
0015
0025
0035
0045
0067
10
10
10
9
27
27
22
15
11
9
21
21
19
14
11
9
.1
.0
.0
.8
.8
.3
.6
.9
.8
.2
.6
.1
.3
.3
.9
.4
10.
10.
10.
10.
5.
0.
1.
8.
6.
0.
0.
0.
0.
6
6
8
6
4
4
2
6
6
4
8
6
6
11EPALES
00300
00
MG/L
10.6
10.6
10.8
10.6
5.4
0.4
1.2
8.6
6.6
0.4
0.8
0.6
0.6
00077
TRANSP
SECCHI
INCHES
35
78
120
00094
CNDUCTVY
FIELD
HICROMHO
141
140
145
140
148
146
130
108
97
101
135
139
129
111
107
141
3
00400
PH
SU
6.40
6.30
7.00
7.10
9.20
9.10
6.90
6.60
6.60
6.60
7.40
7.20
6.80
6.70
6.60
6.60
00410
T ALK
CAC03
MG/L
39
40
41
42
40
39
38
39
23
42
44
42
42
45
48
66
2111202
0030 FEET DEPTH
00610 00625 00630 00671
NH3-N TOT KJEL N02&N03 PHOS-DIS
TOTAL N N-TOTAL ORTHO
MG/L MG/L MG/L MG/L P
0.040
0.040
0.040
.040
.060
.040
.060
.030
.020
.190
.070
.070
.190
0.200
0.330
1.430
.200
.300
.300
.400
.800
.700
.700
.700
.200K
.500
.500
.300
.4(0
.300
.300
.500
.800 O.OOS
.600 0.0*5
.too
.600
.200
.200
.500
.500
.980
.300
.980
.000
.940
.920
.840
.060
.004
.004
.006
.006
.006
.005
.003
.005
.008
.008
.012
.008
.007
.012
DATE
FROM
TO
73/04/11
73/07/21
73/10/01
TIME DEPTH
OF
DAY FEET
11 50 0000
11 50 0004
11 50 0015
11 50 0025
13 25 0000
13 25 0005
13 25 0015
13 25 0025
13 25 0040
13 25 0065
13 15 0000
13 15 0015
13 15 0025
13 15 0035
13 15 0045
13 15 0067
00665
PHOS-TOT
MG/L P
0.025
0.029
0.033
0.023
0.014
0.018
0.019
0.013
0.012
0.018
0.017
0.016
0.026
0.021
0.017
0.024
32217
CHLRPHYL
A
UG/L
6.1
13.0
6.0
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 75/09/16
240802
39 26 57.0 076 33 47.0
LOCH RAVEN RESERVOIR
24005 MARYLAND
DATE
FROM
TO
73/04/11
73/07/21
73/10/01
00010
TIME DEPTH WATER
OF TEMP
DAY FEET
12
12
12
12
13
13
13
13
10
10
10
10
10
10
10
20
20
20
20
55
55
55
55
50
50
50
SO
50
50
SO
0000
0004
0015
0040
0000
0005
0015
0037
0000
0015
0025
0030
0035
0040
0055
CENT
10
10
10
10
27
27
23
12
21
21
19
18
14
12
10
.2
.2
.2
.2
.5
.4
.2
.1
.4
.3
.0
.0
.8
.9
.7
00300 00077 00094
DO TRANSP CNDUCTVY
SECCHI FIELD
MG/L INCHES MICROMHO
10.4
10.4
10.4
9.8
4.8
1.2
8.0
7.6
2.6
0.2
0.3
0.8
35 140
140
138
150
72 152
153
132
100
108 139
140
133
128
117
115
129
11EPALES
3
00400 00410
PH T ALK
CAC03
SO
6.50
6.70
6.50
7.00
8.90
8.70
7.00
6.70
7.80
7.50
7.00
6.80
6.70
6.70
MG/L
40
41
41
44
42
43
40
38
42
40
39
41
45
57
2111202
0044 FEET DEPTH
00610 00625 00630 00671
NH3-N TOT KJEL N02&N03 PHOS-DIS
TOTAL N N-TOTAL ORTHO
MG/L
0.060
0.060
0.060
0.060
0.060
0.060
0.090
0.070
0.050
0.050
0.130
0.330
0.510
1.170
MG/L MG/L
0.400
0.300
0.300
0.700
O.SOO
O.SOO
0.400
0.300
0.500
0.400
0.300
.900
.600
.600
.600
.300
.200
.490
.600
.020
.010
.300
0.500 0.770
0.700 0.620
1.400 o.oao
MG/L P
0.005
0.006
0.005
0.007
0.004
0.008
0.007
0.005
0.007
0.006
0.008
0.008
0.007
0.007
00665 32217
DATE TIME DEPTH PHOS-TOT CHLRPHYL
FROM OF A
TO DAY FEET MG/L P UG/L
73/04/11
73/07/21
73/10/01
12 20 0000
12 20 0004
12 20 0015
12 20 0040
13 55 0000
13 55 0005
13 55 0015
13 55 0037
10 50 0000
10 50 0015
10 50 0025
10 50 0035
10 50 0040
10 50 0055
0.047
0.043
0.042
0.041
0.016
0.022
0.021
0.018
0.017
0.019
0.017
0.027
0.038
0.024
5.1
12.2
5.8
-------
STORE! RETRIEVAL DATE 75/09/16
240803
39 28 48.0 076 34 57.0
LOCH RAVEN RESERVOIR
84005 MARYLAND
DATE TIME DEPTH
FROM OF
TO DAY FEET
73/04/11
73/07/21
73/10/01
00010 00300 00077 00094
WATER DO TRANSP CNDUCTVY
TEMP SECCHI FIELD
CENT M6/L INCHES MICROMHO
13 00 0000
13 00 0004
13 00 0015
13 00 0038
15 50 0000
15 50 0005
15 50 0015
15 50 0036
10 15 0000
10 15 0020
10 15 0030
10 15 0035
10 15 0042
10.6
10.6
10.6
10.4
27.9
27.6
22.2
12.1
21.3
20.7
18.6
14.8
12.8
10.0
10.0
10.0
10.8
6.2
0.8
7.8
4.4
3.2
0.6
0.6
18
84
84
138
130
130
135
148
145
136
112
138
138
133
125
129
11EPALES
3
00400 00410
PH T ALK
CAC03
su
6.90
6.90
6.70
6.60
9.20
9.10
7.20
6.70
7.60
7.10
6.80
6.70
6.70
MG/L
31
32
31
30
38
40
43
49
41
41
41
51
59
2111202
0042 FEET DEPTH
00610 00625 00630 00671
NH3-N TOT KJEL N02&N03 PHOS-DIS
TOTAL N N-TOTAL ORTHO
MG/L
0.060
0.070
0.060
0.070
0.040
0.060
0.100
0.360
0.100
0.070
0.240
0.700
1.060
MG/L MG/L
0.600
0.500
0.500
0.700
0.600
O.SOO
0.200K
.500
.600
.200K
.600
.600
.600
.600
.600
.400
.300
.700
.100
.160
.260
.210
.800 0.400
.300 0.070
MG/L P
0.012
0.010
0.008
0.008
0.005
0.008
0.006
0.005
0.011
0.009
0.011
0.009
0.008
00665 32217
DATE TIME DEPTH PHOS-TOT CHLRPHYL
FROM OF A
TO DAY FEET MG/L P UG/L
73/04/11 13 00 0000 0.073
13 00 0004 0.072
13 00 0015 0.074
13 00 0038 0.098
73/07/21 15 50 0000 0.018
15 50 0005 0.019
15 50 0015 0.023
15 50 0036 0.041
73/10/01 10 15 0000 0.019
10 15 0020 0.029
10 15 0030 0.089
10 15 0035 0.056
10 15 0042 0.085
3.2
7.7
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
APPENDIX C
TRIBUTARY and WASTEWATER
TREATMENT PLANT DATA
-------
STORET RETRIEVAL DATE 75/09/16
2408A1
39 25 33.0 076 31 47.0
GUNPOWDER FALLS
34013 7.5 TOWSON
0/LOCH RAVEN RESERVOIR
GLENARM RO BRDG S OF SUMMERFIELD FARMS
HEPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
73/05/12
73/06/09
73/07/1*
73/08/11
73/09/09
73/10/14
73/11/10
73/12/09
74/02/13
74/03/02
74/03/10
74/03/17
74/05/11
TIME DEPTH
OF
DAY FEET
13 35
12 45
14 50
11 00
13 55
11 00
12 05
10 40
10 15
11 10
10 15
10 20
14 40
00630
N02&N03
N-TOTAL
MG/L
1.440
1.440
1.160
1.120
0.510
0.570
0.740
0.560
1.340
1.400
1.760
1.520
1.340
00625
TOT KJEL
N
MG/L
0.240
0.230
0.330
0.290
0.690
1.200
0.450
0.900
0.200
0.300
0.400
0.400
0.200
00610
NH3-N
TOTAL
MG/L
0.013
0.020
0.048
0.031
0.015
0.018
0.060
0.048
0.040
0.015
0.010
0.020
0.015
00671
PHOS-DIS
ORTHO
MG/L P
0.010
0.005K
0.005K
0*009
0.012
0.015
0.010
0.032
0.005
0.005
0.005K
0.005K
0.005K
00665
PHOS-TOT
MG/L P
0.080
0.035
0.015
0.025
0.040
0.105
0.030
0.025
0.030
0.010
0.020
0.010
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 75/09/16
2408A2
39 38 50.0 076 37 30.0
GUNPOWDER FALLS
24 7.5 PHOENIX
I/LOCH RAVEN RESERVOIR
PHOENIX RO BROG .5 MI NW OF PHOENIX
1IEPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
73/05/12
73/06/09
73/07/14
73/08/11
73/09/09
73/10/14
73/11/10
73/12/09
74/01/12
74/02/08
74/03/02
74/03/10
74/03/17
74/05/11
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
10
09
18
08
08
09
13
10
08
08
09
12
08
12
20
20
20
20
40
22
40
20
40
40
00
10
15
20
MG/L
1
1
1
1
1
1
1
1
1
1
1
1
1
1
.740
.660
.720
.660
.660
.500
.820
.400
.400
.800
.760
.500
.840
.510
MG/L
0.
0.
0.
0.
0.
2.
0.
0.
1.
0.
0.
0.
0.
0.
390
170
520
210
320
300
100K
600
000
200
300
500
400
200
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
015
009
027
005K
021
060
031
040
098
0.020
0.
0.
0.
0.
015
010
030
010
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
p
005K
006
005K
009
Oil
006
009
020
022
015
005K
005K
005
005K
MG/L P
0.020
0.045
0.025
0.030
0.015
0.015
0.009
0.075
0.015
0.015
0.020
0.015
0.010
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 75/09/16
240861
39 29 05.0 076 38 46.0
BEAVERDAM RUN
24 7.5 COCKEYSVILLE
T/LOCH RAVEN RESERVOIR
BROG HWY 45 N OF COCKEYSVILLE
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
73/05/12
73/06/09
73/07/14
73/08/11
73/09/09
73/10/14
73/11/10
73/12/09
74/01/12
74/02/08
74/03/02
74/03/10
74/03/17
74/05/11
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
11
10
08
08
09
09
14
08
09
08
09
10
08
12
10
35
35
30
05
30
10
20
00
50
20
00
30
35
MG/L
1
1
1
1
1
2
1
0
1
1
1
1
1
1
.600
.620
.720
.700
.920
.100
.900
.600
.600
.900
.900
.800
.760
.360
MG/L
0.
0.
0.
0.
0.
1.
0.
0.
0.
0.
0.
0.
0.
260
110
190
200
400
400
250
300
100K
300
400
500
200
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.020
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
013
Oil
005K
015
044
046
036
052
020
020
005
025
010
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
P
035
005K
010
008
007
006
007
028
005K
010
005
005K
005K
0.005K
MG/L P
0.050
0.030
0.010
0.015
0.015
0.010
0.010
0.025
0.010
0.015
0.005
0.010
0.005
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 75/09/16
2408C1
39 29 35.0 076 38 40.0
WESTERN RUN
24 7.5 COCKEYSVILLE
T/LOCH RAVEN RESERVOIR
PAPER MILL RD 8RDG SW OF ASHLAND
1IEPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
73/05/12
73/06/09
73/07/14
73/08/11
73/09/09
73/10/14
73/11/10
73/12/09
74/01/12
74/02/08
74/03/02
74/03/10
74/03/17
74/05/11
00630 00625
TIME DEPTH N02tkN03 TOT KJEL
OF N-TOTAL N
DAY FEET MG/L
10
10
08
09
09
09
14
10
09
09
09
10
08
13
45 1.800
05 1
55 1
00 1
50 1
40 J
30 1
30 1
L.880
L.960
1.740
1.780
1.700
1.940
1.760
20 1.760
00 2.600
15 2.150
40 2.100
45 2.000
05 1.520
MG/L
0.100K
0.100K
0.230
0.320
0.360
0.100K
0.100K
1.200
0*600
0.100K
0.200
0.300
0.300
0.300
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.005K
0.008
0.023
0.005K
0.023
0.007
0.029
0.052
0.056
0.020
0.010
0.015
0.020
0.010
MG/L P
0.010
0.012
0.021
0.010
0.013
0.008
0.017
0.064
0.048
0.025
0.015
0.010
0.012
0.010
MG/L P
0.025
0.045
0.045
0.055
0.020
0.015
0.030
0.150
0.025
0.030
0.025
0.030
0.025
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 75/09/16
2408D1
39 30 20.0 076 36 25.0
GREENE BRANCH
24 7.5 PHOENIX
T/LOCH RAVEN RESERVOIR
PAPER MILL RD 8ROG .5 MI UP FR RES
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
73/05/12
73/06/09
73/07/14
73/08/11
73/09/09
73/10/14
73/11/10
73/12/09
74/01/12
74/02/08
74/03/02
74/03/10
74/03/17
74/05/11
00630 00625
TIME DEPTH N028.N03 TOT KJEL
OF N-TOTAL N
UAY FEET MG/L MG/L
10
09
08
08
08
09
13
10
08
08
08
10
08
12
05 1.740
00 1.740
10
00
20
10
25
00
30
.660
.820
.840
.580
.680
.010
.760
30 2.080
45 1.840
00 1.900
00 1.900
00 1.440
2.200
0.310
0.120
0.100K
0.150
0.720
0.100K
3.500
0.200
0.100K
0.200
0.300
0.500
0.400
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L MG/L P MG/L P
0.072
0.010
0.011
0.005K
0.016
0.017
0.025
0.128
0.028
0.015
0.015
0.010
0.030
0.015
0.010
0.010
0.009
0.012
0.012
0.006
0.009
0.076
0.008
0.010
0.010
0.005K
0.005K
0.005K
0.020
0.055
0.025
0.020
0.015
0.010
0.009
0.025
0.010
0.010
0.010
0.010
0.011
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 75/09/16
2408E1
39 25 20.0 076 32 20.0
MINEBANK RUN
24 7.5 TOtfSON
T/LOCri RAVEN RESERVOIR
LOCH RAVEN RD BRDG
11EPALES 2111204
4 0000 FEET
DATE
FROM
TO
73/05/12
73/06/09
73/07/14
73/08/11
73/09/09
73/10/14
73/11/10
73/12/09
74/01/12
74/02/08
74/03/02
74/03/10
74/03/17
74/05/11
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
13
12
14
10
13
10
11
09
10
10
10
10
10
15
15
20
35
45
40
50
55
55
45
15
45
45
00
00
MG/L
0
1
0
0
0
1
0
0
1
1
1
1
1
0
•
•
*
•
•
•
•
•
*
•
•
•
•
•
850
320
980
930
800
680
880
660
340
280
180
200
280
830
MG/L
0.
0.
0.
140
130
320
0.280
0.
0.
0.
1.
0.
0.
0.
0.
0.
0.
270
630
150
000
300
100K
100
600
500
200
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
005K
010
018
005K
046
005K
035
056
024
010
005K
015
030
005K
MG/L P
0.008
0.006
0.005K
0.007
0.008
0.008
0.052
0.008
0.015
0.010
0.005
0.005K
0.005K
MG/L P
0.020
0.020
0.010
0.007
0.008
0.008
0.005
0.020
0.115
0.010
0.010
0.005
0.005K
DEPTH
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 75/09/16
2408F1
39 27 58.0 076 32 45.0
DULVANEY VALLEY BRANCH
24 7.5 TOWSON
T/LOCH RAVEN RESERVOIR
LOCH RAVEN «D BROG
1IEPALES 2111204
4 0000 FEET
DATE
FROM
TO
73/05/12
73/06/09
73/07/14
73/08/11
73/09/09
73/10/14
73/11/10
73/12/09
74/01/12
74/02/13
74/03/02
74/03/10
74/03/17
74/05/11
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
12 00
11 15
14 15
10 40
13 10
10 35
11 30
09 45
10 30
10 05
10 05
11 45
09 40
14 10
MG/L
2.300
2.600
2.600
2.900
2.800
2.800
0.260
1.440
2.760
3.250
2.400
2.900
2.700
2.400
MG/L
0.170
0.380
0.600
0.560
0.600
0.520
1.700
0.400
0.400
0.200
0.500
0.700
0.700
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.008
0.022
0.018
0.048
0.048
0.024
2.300
0.092
0.024
0.030
0.020
0.030
0.030
0.020
MG/L P
0.018
0.036
0.030
0.098
0.072
0.010
0.014
0.140
0.048
0.040
0.005
0.050
0.035
0.020
MG/L P
0.040
0.080
0.055
0.170
0.100
0.150
0.095
0.100
0.010
0.145
0.095
0.065
DEPTH
-------
STORE! RETRIEVAL DATE 75/09/16
2408G1
39 27 52.0 076 34 21.0
FITZHUGH RUN
24 7.5 TOWSON
T/LOCH RAVEN RESERVOIR
DULVANEY VLY RD BRUG
11EPALES 2111204
4 0000 FEET
DEPTH
DATE
FROM
TO
73/05/12
73/06/09
73/07/1^
73/08/11
73/09/09
73/10/14
73/11/10
73/12/09
74/01/12
74/02/13
74/03/02
74/03/10
74/03/17
74/05/11
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
12
11
14
10
12
10
11
09
10
09
10
11
09
14
30
00
00
30
50
25
20
40
15
55
25
30
20
00
MG/L
2.
2.
2.
1.
2.
2.
1.
1.
2.
2.
2.
2.
2.
1.
300
200
300
890
000
100
940
430
100
700
900
300
200
920
MG/L
0.110
0.160
0.100K
0.140
0.390
0.100K
0.100K
0.105
0.500
0.100K
0.600
0.300
0.300
0.100K
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
006
012
015
016
036
012
044
088
032
020
035
015
035
017
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
P
005K
005K
005K
012
013
006
008
036
008
005
055
005K
005
005K
MG/L P
0
0
0
0
0
0
0
0
0
0
0
0
0
0
.010
.030
.010
.012
.020
.006
.008
.105
.015
.005
.125
.005K
.010
.005K
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 75/09/16
2408H1
39 26 45.0 076 35 45.0
UNNAMED STREAM
24 7.5 TOWSON
T/LOCH RAVEN RESERVOIR
DULVANEY VLY RO BROG SE EDGE OF WAKEFIEL
HEPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
73/05/12
73/06/09
73/07/14
73/08/11
73/09/09
73/10/14
73/11/10
73/12/09
74/01/12
74/02/13
74/03/02
74/03/10
74/03/17
74/05/11
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
12 15
11 50
13 45
1C 10
12 20
10 10
10 55
09 30
09 40
09 45
09 50
11 20
09 10
13 50
MG/L
2.100
2.200
2.100
2.120
1.800
1.900
1.900
0.924
1.920
2.600
2.300
2.200
2.000
1.930
MG/L
0.100K
0.270
0.630
0.100K
0.290
0.500
0.100K
0.800
0.300
0.100K
0.400
0.700
0.400
0.100K
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.007
0.023
0.010
0.009
0.029
0.034
0.024
0.032
0.020
0.015
0.020
0.022
0.055
0.010
MG/L P
0.015
0.014
0.008
0.022
0.027
0.023
0.046
0.040
0.005K
0.005K
0.015
0.005
0.010
0.010
MG/L P
0.025
0.020
0.015
0.025
0.032
0.055
0.075
0.020
0.020
0.020
0.010
0.010
0.025
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 75/09/16
2408J1
39 26 22.0 076 35 50.0
SPRING BRANCH
24 7.5 TOWSON
T/LOCH RAVEN RESERVOIR
DULVANEY VLY RO BROG N OF VALLEY CREST
I1EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
73/05/12
73/06/09
73/07/14
73/08/11
73/09/09
73/10/14
73/11/10
73/12/09
74/01/12
74/02/13
74/03/02
74/03/10
74/03/17
74/05/11
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
12 00
11 40
13 45
10 00
12 00
10 15
10 45
09 50
10 00
11 00
09 35
09 40
13 15
09 00
13 30
MG/L
1.700
1.900
1.720
1.820
1.620
1.540
1.140
0.870
2.160
1.040
2.000
2.000
1.920
1.850
1.340
MG/L
0.110
0.100K
0.100K
0.100K
0.100K
0.100K
1.000
0.300
0.400
0.200
1.200
0.600
0.300
0.200
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.005K
0.010
0.012
0.010
0.014
0.013
0.027
0.036
0.032
0.084
0.010
0.015
0.010
0.020
0.010
MG/L P
0.005K
0.006
0.006
0.017
0.016
0.008
0.012
0.080
0.024
0.006
0.015
0.010
0.005K
0.005
0.010
MG/L P
0.015
0.010
0.010
0.017
0.020
0.010
0.030
0.030
0.030
0.045
0.007
0.020
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 75/09/16
2408K1
39 25 50.0 076 32 35.0
GUNPOWDER FALLS RIVER
24 7.5 TOWSON
0/LOCH RAVEN RESERVOIR
AT LOCH RAVEN DAM
11EPALES 2111204
4 0000 FEET
DATE
FROM
TO
73/11/15
73/11/29
73/12/13
73/12/28
74/01/15
74/02/14
74/02/28
74/03/14
74/03/28
74/04/15
74/04/30
00630 00625
TIME DEPTH N02S-N03 TOT KJEL
OF N-TOTAL N
DAY FEET MG/L
15
09
15
11
13
14
11
11
16
13
16
13
00 0.800
30 0.910
30 0.910
00
00
00
00
00
00
.090
.440
.120
.340
.440
.600
00 1.010
15 1.090
00 0.920
MG/L
0.400
0.300
0.200
0.200
0.100
0.200
0.200
0.300
0.300
0.300
0.300
0.300
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.147
0.208
0.096
0.076
0.012
0.044
0.030
0.010
0.015
0.085
0.050
0.020
MG/L P
0.005K
0.008
0.005K
0.008
0.005K
0.006
0.010
0.005K
0.005K
0.010
0.010
0.005
MG/L P
0.010
0.050
0.010
0.010
0.010
0.015
0.020
0.040
0.010
0.040
0.010
0.060
DEPTH
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 75/09/16
2408XA AS2408XA P003000
39 36 07.0 076 50 30.0
HAMPSTEAO S.T.P.
24 CARROLL COUNTY
T/LOCH RAVEN RESERVOIR
PINEY RUN/WESTERN RUN
11EPALES 2141204
4 0000 FEET DEPTH
DATE
FROM
TO
73/06/29
cpm-
73/06/29
73/07/31
CP(T)-
73/07/31
73/08/31
CP(T)-
73/08/31
73/09/28
CP(T)-
73/09/28
74/01/15
CPIT)-
74/01/15
74/02/12
CP-
74/10/22
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET MG/L MG/L
11
16
11
16
11
16
11
16
11
16
10
15
08
16
07
16
07
16
07
16
07
16
00
00
00
00
00
00
00
00
00
00
00
30
00
30
30
30
30
30
30
30
30
30
2
3
Z
9
13
12
4
8
7
10
5
11
.100
.150
.400
.300
.600
.600
.700
.700
.800
.900
.610
.600
5.400
4.600
3.500
2.000
1.500
3.200
2. 100
9.000
3.800
2.300
5.400
9.200
2.100
00610 00671
NH3-N PHOS-D1S
TOTAL ORTHO
MG/L MG/L P
0.780
0.360
0.240
0.130
0.245
0.450
0.270
1.450
0.005K
0.260
0.450
1.550
0.091
8.000
5.800
10.800
10.000
9.050
9.600
7.800
9.700
8.500
8.600
11.000
9.650
9.100
00665 50051 50053
PHOS-TOT FLOW CONDUIT
RATE FLOW-MOD
MG/L P INST MGO MONTHLY
9.000
8.900
12.000
10.000
9.050
10.500
8.800
11.000
8.800
8.700
11.000
10.500
0
0
0
0
0
0
0
0
0
0
0
0
0
.158
.116
.110
.111
.099
.096
.106
.098
.120
.121
.109
.109
.074
0.166
0.120
0.117
0.108
0.100
0.102
0.086
0.108
0.114
0.114
0.094
0.108
0.090
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 75/09/16
2408YA AS2408YA P001000
39 38 29.0 076 50 19.0
MANCHESTER S.T.P.
24 CARROLL COUNTY
T/LOCH RAVEN RESERVOIR
GEORGES RUN/PRETTY SOY MCS/6UN POWDER FL
11EPALES 21412*4
4 0000 FEET DEPTH
DATE
FROM
TO
73/07/03
CP-
73/07/03
73/08/01
CP(T>-
73/08/01
73/09/05
CP(T)-
73/09/05
73/12/05
CP(T)-
73/12/05
74/01/22
74/02/12
CP(T>-
74/02/12
74/04/03
CP -
74/05/01
74/08/29
CPU>-
74/08/29
00630
TIME DEPTH N02&N03
OF N-TOTAL
DAY FEET MG/L
11 00
2.300
16 00
11
16
11
16
10
15
10
11
16
11
15
11
15
10
15
00
00
00
00
00
30
30
00
00
00
00
00
30
00
00
23.
5.
7.
19.
17.
9.
2.
000
100
200
000
600
500
400
00625
TOT KJEL
N
MG/L
15.400
6.
5.
15.
9.
7.
7.
12.
6.
800
500
500
300
000
400
000
700
00610 00671 00665 50051 50053
NH3-N PHOS-DIS PHOS-TOT FLOW CONDUIT
TOTAL ORTHO RATE FLOW-MGD
MG/L MG/L P MG/L P INST MOD MONTHLY
5.100 9.200 12.500 0.064 0.067
4.200
5.800
2.400
3.700
3.800
4.900
0.050K
13.000
16.000
10.100
12.000.
11.500
12.000
17.000
16.000
10.500
12.500
11.500
13.000
17.300
0.070
0.076
0.073
0.090
0.094
0.100
0.092
0.139
0.065
0.077
0.067
0.085
0.082
0.097
0.109
0.114
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 75/09/16
240830 AS240830 POOOOOO*
39 38 29.0 076 50 19.0
DUTTERER'S OF MANCHESTER
24005 CARROL COUNTY
T/LOCH RAVEN RESERVOIR
GEORGES RUN/PRETTY BOY RES/GUNPOWDER FAL
HEPALES 2141204
4 0000 FEET DEPTH
DATE
FROM
TO
73/06/28
CP(T>-
73/06/28
73/07/17
cpm-
73/07/17
73/08/23
CP(T)-
73/08/23
73/09/20
cpm-
73/09/20
73/10/17
cpm-
73/10/17
73/11/29
CP(T)-
73/11/29
73/12/13
cpm-
73/12/13
74/01/18
CP(T>-
74/01/18
74/02/21
CP(T)-
74/02/21
00630 00625
TIME DEPTH N02S.N03 TOT KJEL
OF N-TOTAL N
DAY FEET MG/L MG/L
07
16
08
16
07
16
08
00
30
00
30
30
30
00
15
16
8
.200
.400
.700
7.900
16
07
15
08
15
08
16
08
16
08
16
00
40
30
00
30
00
00
00
00
00
30
17
15
0
7
1
.600
.000
.040
.040
.480
0.330
1.300
1.320
1.200
1.250
5.400
2.700
2.400
6.200
00610 00671 00665 50051 50053
NH3-N PHOS-OIS PHOS-TOT FLOW CONDUIT
TOTAL ORTHO RATE FLOW-MGD
MG/L MG/L P MG/L P INST MGD MONTHLY
0.270
0.120
0.096
0.400
0.069
0.380
0.360
0.880
1.680
0.310
0.400
0*490
0.365
0.485
0.195
0.450
0.193
0.170
0.850
0.870
0.780
0.800
0.860
1.800
1.150
0.980
1.250
0
0
0
0
0
0
0
0
0
.026
.027
.017
.029
.027
.025
.030
.034
.031
0.022
0.018
0.021
0.021
0.022
0.022
0.020
0.023
0.028
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APPENDIX D
CONVERSION FACTORS
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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
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APPENDIX E
PARAMETRIC RANKINGS OF LAKES
SAMPLED BY NES IN 1973
STATE OF MARYLAND
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LAK.ES RANKED BY INDEX NOS.
RANK LAKE CODE LAKE NAME INDEX NO
i 2402 DEEP CREEK LAKE 550
? 2403 LIBERTY RESERVOIR 268
3 2408 LOCH RAVEN RESERVOIR 215
4 2409 JOHNSON POND 167
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LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
2402 DEEP CREEK LAKE
2403 LIBERTY RESERVOIR
2403 LOCH RAVEN RESERVOIR
2409 JOHNSON POND
MEDIAN
TOTAL P
0.011
0.018
0.023
0.098
MEDIAN
INORG N
0.450
1.760
1.440
0.950
500-
MEAN SEC
382.167
401.833
429.555
458.250
MEAN
CHLORA
6.150
6.325
7.133
26.225
15-
MIN DO
14.800
14.900
14.800
7.200
MED I,
DISS ORTI
0.005
0.006
0.007
0.040
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PERCENT OF LAKES WITH HIGHER VALUES (NUMBER OF LAKES WITH HIGHER VALUES)
LAKE
CODE LAKE NAME
2403 DEEP CREEK LAKE
2403 LIBERTY RESERVOIR
2408 LOCH RAVEN RESERVOIR
2409 JOi-NSC,-; POMO
MEDIAN
TOTAL P
100 (
67 (
33 (
0 (
3)
2)
I)
0)
MEDIAN
INORG N
100 (
0 (
33 (
67 (
3)
0)
1)
2)
500-
MEAN SEC
100 (
67 (
33 <
0 <
3)
2)
1)
0)
MEAN
CHLORA
100 (
67 (
33 <
0 (
3)
2)
1)
0)
15-
MIN DO
50 (
0 (
50 (
100 (
1)
0)
1)
3)
MEDIAN
DISS ORTHO P
100 (
67 (
33 (
0 (
3)
2)
1)
0)
INDEX
NO
550
268
215
167
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