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CBP/TOS 38/90
January 1990
The Chesapeake Bay
Segmentation Scheme
U.S. Environmental Protection Agency
Region III Information Resource
Center (3PM52)
841 Chestnut Street
Philadelphia, PA 19107
., V
Chesapeake
Bay
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v. V
Chesapeake Bay
Program
The Chesapeake Bay
Segmentation Scheme
Produced by
COMPUTER SCIENCES CORPORATION
January 1990
Printed by the United States Environmental Protection Agency
for the
Chesapeake Bay Program
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THE CHESAPEAKE BAY
SEGMENTATION SCHEME
The Chesapeake Bay Segmentation Scheme was developed and adopted by the Chesapeake
Bay Program Agencies in 1983. It was first published in the September 1983 Chesapeake
Bay: A Profile of Environmental Changes Appendices. Since then it has been used to
design environmental monitoring programs and as the spatial scheme for management and
interpretation of monitoring data. Recently, the Chesapeake Bay Segmentation Scheme has
been entered into the Chesapeake Bay Program's Geographic Information System to ensure
its accessibility by all Program agencies.
The following maps and listings describe the latitude/longitude coordinates for the
Chesapeake Bay Segmentation Scheme. The maps divide the Bay into three sections—
Upper, Middle, and Lower—and include a letter at each point where a segment line crosses
or divides an area. The segments and points where each boundary of the segment
intersects with the Bay's shoreline are listed in order by Mainstem, Western Shore
Tributaries, and Eastern Shore Tributaries, with the latitude/longitude coordinates for each
point.
Electronic copies of the latitude/longitude coordinates and/or ARC/INFO GIS files
are available upon request Requests for further information should be directed to:
Ricky Price
Computer Sciences Corporation
Chesapeake Bay Liaison Office
410 Severn Avenue
Annapolis, Maryland 21403
(301) 266-6873
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CHESAPEAKE BAY SEGMENTATION SCHEME
CB-l
ET-1
WT-1.
WT-
-2
WT
WT-
WT
RET
ET-10
EE-3
RET-
B-8
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CHESAPEAKE BAY SEGMENTATION SCHEME
SEGMENT DESCRIPTIONS
Segment
CB-1 Northern Chesapeake Bay
CB-2 Upper Chesapeake Bay
CB-3 Upper Central Chesapeake Bay
CB-4 Middle Central Chesapeake Bay
CB-5 Lower Chesapeake Bay
CB-6 Western Lower Chesapeake Bay
CB-7 Eastern Lower Chesapeake Bay
CB-8 Mouth of the Chesapeake Bay
WT-1 Bush River
WT-2 Gunpowder River
WT-3 Middle River
WT-4 Back River
WT-5 Patapsco River
WT-6 Magothy River
WT-7 Severn River
WT-8 South/Rhode/West rivers
TF-1 Upper Patuxent River
RET-1 Middle Patuxent River
LE-1 Lower Patuxent River
TF-2 Upper Potomac River
RET-2 Middle Potomac River
LE-2 Lower Potomac River
TF-3 Upper Rappahannock River
RET-3 Middle Rappahannock River
LE-3 Lower Rappahannock River
Segment
TF-4 Upper York River
RET-4 Middle York River
LE-4 Lower York River
WE-4 Mobjack Bay
TF-5 Upper James River
RET-5 Middle James River
LE-5 Lower James River
ET-1 Northeast River
ET-2 Elk/Bohemia River
ET-3 Sassafras River
ET-4 Chester River
ET-5 Choptank River
ET-6 Nanticoke River
ET-7 Wicomico River
ET-8 Manokin River
ET-9 Big Annemessex River
ET-10 Pocomoke River
EE-1 Eastern Chesapeake Bay
EE-2 Lower Choptank River
EE-3 Tangier Sound
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CHESAPEAKE BAY SEGMENTATION SCHEME LATITUDE/LONGITUDE COORDINATES
(MAINSTEM)
SEGMENT SEGMENT LATITUDE LONGITUDE
POINT
CB1
CB1
CB1
CB1
CB1
CB1
CB2
CB2
CB2
CB2
CB2
CB2
CB2
CB2
CB2
CB2
CB2
CB2
CB3
CBS
CBS
CBS
CBS
CBS
CBS
CBS
CBS
CBS
CBS
CBS
CBS
CBS
CBS
CBS
CBS
CBS
CB4
CB4
CB4
CB4
CB4
CB4
CB4
CB4
A
B
C
D
E
F
A
B
C
D
E
F
G
H
I
J
K
L
A
B
C
D
E
F
G
H
I
J
K
L
M
N
0
P
Q
R
A
B
C
D
E
F
G
H
39 26 55.47
39 32 44.57
39 33 00.76
39 32 27.40
39 31 49.01
39 27 07.61
39 17 53.91
39 20 20.88
39 21 05.21
39 26 55.47
39 27 07.61
39 26 57.20
39 25 46.18
39 23 19.98
39 22 21.04
39 15 52.56
39 17 04.11
39 17 13.64
39 00 53.49
39 02 20.98
39 04 26.61
39 07 54.41
39 11 41.04
39 13 52.65
39 14 51.30
39 17 10.85
39 18 29.12
39 18 54.75
39 18 14.33
39 17 53.91
39 17 13.64
39 17 04.11
39 15 52.56
39 01 44.87
39 00 58.21
39 00 42.99
38 23 04.92
38 51 00.43
38 54 27.67
38 56 45.91
38 58 30.12
39 00 53.49
39 00 42.99
38 50 14.70
76 03 38.82
76 05 04.58
76 04 22.16
76 00 13.68
75 58 52.27
76 00 45.62
76 16 59.05
76 15 26.56
76 14 00.57
76 03 38.82
76 00 45.62
76 00 29.77
75 59 54.29
76 02 33.56
76 06 06.54
76 13 04.25
76 15 43.30
76 16 06.23
76 23 44.95
76 24 51.20
76 25 21.75
76 26 06.99
76 26 39.56
76 24 29.81
76 24 35.68
76 23 00.42
76 20 39.35
76 19 44.86
76 17 51.06
76 16 59.05
76 16 06.23
76 15 43.30
76 13 04.25
76 14 33.47
76 17 51.16
76 19 21.60
76 22 55.70
76 29 30.60
76 28 02.20
76 27 22.48
76 27 10.06
76 23 44.95
76 19 21.60
76 22 21.84
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CHESAPEAKE BAY SEGMENTATION SCHEME LATITUDE/LONGITUDE COORDINATES
(MAINSTEM - CONTINUED)
SEGMENT SEGMENT LATITUDE LONGITUDE
POINT
CB4
CB4
CBS
CBS
CBS
CBS
CBS
CBS
CBS
CBS
CBS
CBS
CBS
CBS
CBS
CBS
CB6
CB6
CB6
CB6
CB6
CB6
CB6
CB6
CB7
CB7
CB7
CB7
CB7
CB7
CBS
CBS
CBS
CBS
CBS
CBS
r
j
K
L
M
N
0
F
A
B
C
D
E
F
G
H
I
J
K
L
M
N
A
B
C
D
E
F
G
H
A
B
C
D
E
F
A
B
C
D
E
F
38 45 12.21
38 45 01.27
38 41 37.86
38 40 18.51
38 31 42.13
38 31 04.40
38 29 14.85
38 23 36.45
37 37 09.86
37 54 37.18
38 02 16.81
38 18 16.86
38 19 09.10
38 23 04.92
38 23 36.45
38 13 58.84
38 07 09.53
38 05 00.97
38 02 19.21
37 56 44.03
37 51 07.01
37 48 59.32
37 05 17.30
37 06 24.07
37 18 31.75
37 30 56.34
37 36 49.64
37 37 09.86
37 43 45.32
37 05 01.24
37 05 01.24
37 43 45.32
37 48 59.32
37 48 59.82
37 47 40.37
37 01 02.19
36 59 32.05
37 00 00.46
37 05 17.30
37 05 01.24
37 01 02.19
36 55 37.02
76 22 26.42
76 22 03.89
76 20 46.36
76 20 28.06
76 20 02.91
76 20 01.38
76 19 56.57
76 17 01.93
76 16 46.79
76 15 52.93
76 19 19.09
76 25 15.17
76 25 17.18
76 22 55.70
76 17 01.93
7C 07 42.51
76 02 24.16
76 01 47.64
76 01 19.31
76 00 02.02
75 59 45.66
75 59 53.37
76 16 16.44
76 17 01.52
76 16 33.09
76 17 34.66
76 17 03.98
76 16 46.79
76 07 26.28
76 09 55.97
76 09 55.97
76 07 26.28
75 59 53.37
75 59 33.30
75 48 52.07
75 59 17.28
76 17 47.14
76 IB 39.57
76 16 16.44
76 09 55.97
75 59 17.28
76 00 12.97
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CHESAPEAKE BAY SEGMENTATION SCHEME LATITUDE/LONGITUDE COORDINATES
(WESTERN SHORE TRIBUTARIES)
SEGMENT SEGMENT LATITUDE LONGITUDE
POINT
WT1
WT1
WT2
WT2
WT3
WT3
WT4
WT4
WT5
WT5
WT6
WT6
WT7
WT7
WT8
WT8
TF1
TF1
RET1
RET1
RET1
RET1
LEI
LEI
LEI
LEI
TF2
TF2
RET2
RET2
RET2
RET2
LE2
LE2
LE2
LE2
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
C
D
A
B
C
D
A
B
A
B
C
D
A
B
C
D
39 20 20.88
39 21 05.21
39 18 54.75
39 18 14.33
39 17 10.85
39 18 29.12
39 13 52.65
39 14 51.30
39 07 54.41
39 11 41.04
39 02 20.98
39 04 26.61
38 56 45.91
38 58 30.12
38 51 00.43
38 54 27.67
38 32 32.33
38 32 27.24
38 28 01.09
38 28 07.49
38 32 27.24
38 32 32.33
38 18 16.86
38 19 09.10
38 28 01.09
38 28 07.49
38 31 23.63
38 31 20.52
38 19 56.24
38 20 43.20
38 31 20.52
38 31 23.63
38 02 16.81
37 54 37.18
38 19 56.24
38 20 43.40
76 15 26.56
76 14 00.57
76 19 44.86
76 17 51.06
76 23 00.42
76 20 39.35
76 24 29.81
76 24 35.68
76 26 06.99
76 26 39.56
76 24 51.20
76 25 21.75
76 27 22.48
76 27 10.06
76 29 30.60
76 28 2.20
76 40 42.48
76 40 11.01
76 39 36.39
76 38 45.99
76 40 11.01
76 40 '42.48
76 25 15.17
76 25 17.18
76 39 36.39
76 38 45.99
77 17 06.58
77 15 29.02
77 01 05.72
76 58 42.71
77 15 29.02
77 17 06.58
76 19 19.09
76 15 52.93
77 01 05.72
76 58 42.71
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CHESAPEAKE BAY SEGMENTATION SCHEME LATITUDE/LONGITUDE COORDINATES
(WESTERN SHORE TRIBUTARIES - CONTINUED)
SEGMENT SEGMENT LATITUDE LONGITUDE
POINT
TF3
TF3
RET3
RET3
RETS
RETS
LE3
LE3
LE3
LE3
TF4
TF4
TF4
TF4
RET4
RET4
RET4
RET4
RET4
RET4
LE4
LE4
LE4
LE4
WE 4
WE 4
WE4
WE 4
TF5
TF5
RETS
RETS
RETS '
RETS
LE5
LE5
LE5
LE5
A
B
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
E
F
A
B
C
D
A
B
C
D
A
B
A
B
C
D
A
B
C
D
37 58 41.63
37 59 17.43
37 45 32.39
37 47 16.14
37 59 17.43
37 58 41.63
37 36 49.64
37 30 56.34
37 45 32.39
37 47 16.14
37 32 56.16
37 33 04.40
37 34 06.50
37 34 24.57
37 24 47.62
37 25 05.56
37 34 24.57
37 34 06.50
37 33 04.40
37 32 56.16
37 13 19.99
37 15 18.44
37 25 ('5.56
37 24 ^7.62
37 06 T.4.07
37 13 39.99
37 15 18.44
37 18 31.75
37 13 43.38
37 14 ::5.26
37 08 45.10
37 12 46.64
37 14 25.26
37 13 43.38
36 59 32.05
37 00 00.46
3'7 12 46.64
37 08 45.10
76 55 30.68
76 53 47.35
76 40 50.45
76 37 51.15
76 53 47.35
76 55 30.68
76 17 03.98
76 17 34.66
76 40 50.45
76 37 51.15
76 49 07.73
76 48 58.67
76 47 59.25
76 47 37.79
76 42 34.17
76 41 22.28
76 47 37.79
76 47 59.25
76 48 58.67
76 49 07.73
76 25 48.28
76 26 18.61
76 41 22.28
76 42 34.17
76 17 01.52
76 25 48.28
76 26 18.61
76 16 33.09
76 56 50.10
76 56 47.58
76 43 49.49
76 43 35.86
76 56 47.85
76 56 50.10
76 17 47.14
76 18 39.57
76 43 35.86
76 43 49.49
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CHESAPEAKE BAY SEGMENTATION SCHEME LATITUDE/LONGITUDE COORDINATES
(EASTERN SHORE TRIBUTARIES/EMBAYMENTS)
SEGMENT SEGMENT LATITUDE LONGITUDE
POINT
ET1
ET1
ET2
ET2
ET3
ET3
ET4
ET4
EE1
EE1
EE1
EE1
EE2
EE2
EE2
EE2
EE2
EE2
ET5
ET5
EE3
EE3
EE3
EE3
EE3
EE3
EE3
EE3
EE3
EE3
EE3
EE3
EE3
EE3
EE3
EE3
EE3
EE3
A
B
A
B
A
B
A
B
A
B
C
D
A
B
C
D
E
F
A
B
A
B
C
D
E
F
G
H
I
J
K
L
M
N
0
P
Q
R
39 32 27.40
39 31 49.01
39 26 57.20
39 25 46.18
39 23 19.98
39 22 21.04
39 01 47.66
39 00 58.05
38 50 14.70
38 45 12.21
38 45 01.27
38 41 37.86
38 40 18.51
38 31 42.13
38 31 04.40
38 29 14.85
38 37 42.94
39 01 47.66
39 01 47.66
38 37 42.94
38 13 58.84
38 07 09.53
38 05 00.97
38 02 19.21
37 56 44.03
37 51 07.01
37 48 59.82
37 47 40.37
37 56 32.32
37 58 01.17
38 02 08.17
38 03 33.50
38 04 41.28
38 07 12.71
38 12 11.24
38 13 41.57
38 14 34.32
38 14 39.75
76 00 13.68
75 58 52.27
76 00 29.77
75 59 54.29
76 02 33.56
76 06 06.54
76 14 32.02
76 17 51.21
76 22 21.84
76 22 26.42
76 22 03.89
76 20 46.36
76 20 28.06
76 20 02.91
76 20 01.38
76 19 56.57
76 10 16.49
76 14 32.02
76 14 32.02
76 10 16.49
76 07 42.51
76 02 24.16
76 01 47.64
76 01 19.31
76 00 02.02
75 59 45.66
75 59 33.30
75 48 52.07
75 40 37.52
75 40 31.09
75 52 09.12
75 52 11.06
75 52 39.96
75 56 09.15
75 53 29.68
75 53 33.74
75 54 25.44
75 56 30.60
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CHESAPEAKE BAY SEGMENTATION SCHEME LATITUDE/LONGITUDE COORDINATES
(EASTERN SHORE TRIBUTARIES/EMBAYMENTS - CONTINUED)
SEGMENT SEGMENT LATITUDE LONGITUDE
POINT
ET6 A 38 14 39.75 75 56 30.60
ET6 B 38 14 34.32 75 54 25.44
ET7 A 38 13 41.57 75 53 33.74
ET7 B 38 12 11.24 75 53 29.68
ET8 A 38 07 12.71 75 56 09.15
ET8 B 38 04 41.28 75 52 39.96
ET9 A 38 03 33.50 75 52 11.06
ET9 B 38 02 08.17 75 52 09.12
ET10 A 37 58 01.17 75 40 31.09
ET10 B 37 56 32.32 75 40 37.52
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Upper Chesapeake Bay
Segment Scheme with
Latitude/Longitude
Designations
WT1
WT2
WT3
WT
WT8
ET5
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10
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TFS
Lower Chesapeake Bay
Segment Scheme with
Latitude/Longitude
Designations
IE
II
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