Chesapeake Bay Program

 A Watershed Partnership
          United States   Region III     Monitoring and  Tidal Monitoring  EPA 903-R-05-004
          Environmental   Chesapeake Bay  Analysis    and Analysis   CBP/TRS 278-06
          Protection Agency Program Office   Subcommittee  Workgroup    December 2005
Chesapeake Bay Program
Analytical Segmentation
Scheme
Revisions, Decisions and Rationales
1983-2003
2005 Addendum
        December 2005

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    Chesapeake Bay Program
Analytical Segmentation Scheme
  Revisions, Decisions and Rationales
             1983-2003
           2005 Addendum
              Prepared by the
           Chesapeake Bay Program
       Monitoring and Analysis Subcommittee
      Tidal Monitoring and Analysis Workgroup
            Annapolis, Maryland
              December 2005

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Contents
Introduction  	    1

Methods Used to Subdivide Segments and
Split Segments by Jurisdiction  	    2

Web Access to Segmentation by Jurisdiction 	    4

Literature Cited	    4

Appendix B
Maryland's and Virginia's Chesapeake Bay Program
Split Segments Boundary Delineations by Jurisdiction 	    5

Appendix C
2003 Chesapeake Bay Program Segmentation Scheme
Coordinates Geo-reference and Narrative Descriptions
by Jurisdiction	   11
                                                            Contents

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                         INTRODUCTION

In October 2004, the Chesapeake Bay Program released Chesapeake Bay Program
Analytical Segmentation Scheme: Revisions, Decisions, and Rationales 1983-2003
(U.S. Environmental Protection Agency 2004). The Segmentation Scheme Report
provided documentation on the development of the spatial segmentation scheme of
the Chesapeake  Bay  and tidal tributaries over the period from  1983 to 2003.
Included within the  Segmentation  Scheme Report  were tables  describing the
segment boundaries and split segment boundaries.

Segments have been defined as a way of grouping areas with similar natural charac-
teristics. To  date,  segment boundaries have been  defined  based on  selected
ecological criteria. As a result, management and monitoring strategies can be defined
for each segment as a whole. Additional information on the rationale for utilizing
natural characteristics for delineating segments can be found in the Segmentation
Scheme Report.

It  has become increasingly apparent that the political jurisdictions charged with
adopting water quality standards and developing management strategies for waters
within their jurisdiction need well defined boundaries for the segments that lie within
their authority. The 2003 revisions to the Chesapeake Bay Program segmentation
scheme included multiple segments  and  split segments that crossed jurisdictional
boundaries. This has led to some confusion as to the area within segments that are
under the jurisdiction of the individual states and the District  of Columbia. In an
effort to address this concern, the Chesapeake Bay Program has  revised the descrip-
tions contained within the Segmentation Scheme  to more fully reflect jurisdictional
boundaries.

The purpose of this addendum is to provide an updated description of segments and
split segments by jurisdiction. Each segment or split segment definition contains a
series of points that are defined by both a set of latitude and longitude coordinates in
decimal  degrees and  a textual narrative describing their location. The  segment
boundaries follow the shorelines between the geo-referenced boundary coordinates
including within each segment, all  tidally influenced waters.

In the original Segmentation Scheme Report, the segment and split segment descrip-
tions were  presented in Appendix  B (split segments) and Appendix C (segments).
For purposes of this Addendum, the updated segment descriptions are presented here
as revisions to those appendices. Appendix A of the original Segmentation Scheme
remains unchanged and therefore is not replicated here.
                                                                                    Introduction

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                      METHODS USED TO SUBDIVIDE SEGMENTS AND
                               SPLIT  SEGMENTS  BY JURISDICTION

                  Originally, the impetus to divide certain Chesapeake Bay Program segments came
                  from the desire of Maryland, Virginia  and the  District of Columbia to  adopt
                  submerged aquatic vegetation (SAV) restoration acreages in their respective water
                  quality standards regulations for  the tidal Potomac River. Each Chesapeake Bay
                  Program segment was allocated acreage-specific SAV restoration goals, but the juris-
                  dictions wanted to know what portions of those segments were legally responsible
                  for. To allocate the area of individual Chesapeake Bay Program segments shared by
                  two or more jurisdictions to the  appropriate jurisdiction, it became necessary to
                  apply state and District boundary data to  be able to subdivide those  segments.
                  However, there were no legally recognized boundary data for the tidal Potomac
                  River or even one common boundary dataset that all of the jurisdictions were using.
                  An attempt was made to create a jurisdictional boundary file for the tidal Potomac
                  River that Maryland, Virginia and the District of Columbia could agree upon.
                  After examining several different  digital boundary files, it was determined that the
                  best boundary along the Virginia shoreline was one produced by the Virginia Depart-
                  ment of Conservation and Recreation (VA DCR). The VA DCR  boundary was
                  mostly based on the state boundaries appearing on digital 1:24000 scale quad sheets
                  (digital raster graphics, or DRGs). The Maryland-Virginia state boundary delineated
                  on the quad sheets appears to be based on the Mathews-Nelson Survey of 1927,
                  which used the legally defined boundary of the low-water mark on the Virginia side
                  of the river,  except where embayments were crossed from one point on land to
                  another point on land. However, shorelines can change in almost 80 years, either
                  through natural or anthropogenic influences, which  may  partially account for
                  discrepancies between the legal definition of the boundaries and how the data  appear
                  today. The state boundary was digitized on-screen using the DRGs as a background
                  upon which to trace the line work. In the lower Potomac River, DCR used 1:12000
                  scale digital orthophoto quarter quads (DOQQs) having photo dates of 1992-1996 as
                  the source for the boundary definition. Maps of the state boundary  along the
                  Potomac  River are included in Technical Support Document for Identification of
                  Chesapeake Bay Designated  Uses and Attainability: 2004 Addendum (U.S. Envi-
                  ronmental Protection Agency 2004b).

                  For the Maryland-District of Columbia boundary lines that cross the Potomac River
                  diagonally from the Virginia  shoreline, data provided by the District of Columbia
                  Department of Health's Water Quality Control Branch were used. These data and the
                  VA DCR data were merged  to create a boundary file that all three jurisdictions
                  agreed to use in allocating SAV restoration goals in those shared segments.

                  Later, it was  determined that all segments that crossed jurisdictional boundaries
                  needed to be subdivided. This included the continuation of the Maryland-Virginia
                  boundary across the Chesapeake Bay and partly up the tidal Pocomoke River, and
Methods Used to Divide Segments and Split Segments by Jurisdiction

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the two tidal tributaries—C & D Canal and Nanticoke River—that straddled the
Maryland-Delaware boundary.
The Maryland-Virginia state boundary from VA DCR extended across the Chesa-
peake Bay and up the tidal Pocomoke River. This boundary was used with slight
modification of some of the vertices of the boundary in Pocomoke Sound that subdi-
vided segments  POCMH  and POCOH. Maryland Department of the Environment
provided coordinates of a series of navigational buoys that define the Maryland-
Virginia state boundary at those vertices. The original VA DCR boundary data were
altered to reflect these navigational buoy locations.  The differences in  distance
between the navigational buoy locations  and the vertices in the VA DCR data were
all less than 30 meters, most less than 10 meters.
For the Maryland-Delaware boundary, Maptech 1:24,000 scale DRGs were used to
digitize the boundary line  on-screen. The GIS coverage was then edited and the two
affected segments were split by the state boundary.

Those Chesapeake Bay Program segments that encompass multiple jurisdictions are:
Segment Name
C&D Canal
Upper Nanticoke River
Anacostia
Upper Potomac River
Middle Potomac River
Lower Potomac River
Lower Central Chesapeake
Tangier Sound
Lower Pocomoke River
Middle Pocomoke River
Segment Effected
Descriptor
C&DOH
NANTF
ANATF
POTTF
POTOH
POTMH
CB5MH
TANMH
POCMH
POCOH
Jurisdictions
(DE, MD)
(DE, MD)
(DC, MD)
(DC, MD, VA)
(MD, VA)
(MD, VA)
(MD, VA)
(MD, VA)
(MD, VA)
(MD, VA)
The  Chesapeake Bay Program split segments were created to aid Maryland and
Virginia in their adoption of SAV restoration acreages and water quality standards
(U.S. Environmental Protection Agency 2004b). Two of the segments that were split
for this purpose (POTOH and TANMH) share both Maryland and Virginia waters.
Since the two segments were split by request of Maryland Department of the Envi-
ronment for Maryland attainment, only the Maryland portion of those segments was
required. The state boundary data that was used to subdivide all shared segments by
jurisdiction was also used to subdivide the split segments POTOH 1 and TANMH 1.
Only the Maryland portion of these split segments was retained in the data set.
                                   Methods Used to Divide Segments and Split Segments by Jurisdiction

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                         WEB  ACCESS TO SEGMENTATION SCHEMES
                  The Chesapeake Bay Program partners maintain web access to the past and present
                  segmentation schemes at www.chesapeakebay.net. Segment maps and a map of cur-
                  rent monitoring stations can be found under Maps and Mapping  at this website.
                  Segment maps and monitoring maps are available in GIS format at:
                      ftp://ftp.chesapeakebay.net/pub/Geographic/Chesapeake Bay.
                  The appendices  contained in this addendum are available as an EXCEL file at:
                      www.chesapeakebay.net/segmentscheme.htm.
                                         LITERATURE  CITED

                  U.S. Environmental Protection Agency. 2004a. Chesapeake Bay Program Analytical
                  Segmentation Scheme: Revisions, Decisions and Rationale 1983-2003. EPA 903-R-
                  04-008. CBP/TRS 268/04. Chesapeake Bay Program Office, Annapolis,  Maryland.
                  U.S. Environmental Protection Agency. 2004b. Technical Support Document for
                  Identification of Chesapeake Bay Designated Uses and Attainability. EPA 903-R-04-
                  006. Chesapeake Bay Program Office, Annapolis, Maryland.
Web Access to Segmentation Schemes / Literature Cited

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                                appendix
                                                b>
                  Maryland's  and  Virginia's
                  Chesapeake  Bay  Program
                  Split Segments  Boundary
                Delineations  by Jurisdiction
Table B-1. Latitude/longitude and narrative geo-reference identifiers for the end coordinates bounding
         each of Maryland's and Virginia's split Chesapeake Bay Program segments.
Segment
Description
                          Chesapeake
                          Bay Program
                          Segment
                             Split
                             Segment
                                      Number of Latitude/
                                      Longitude Coordinates
                                      to Follow
MARYLAND SPLIT SEGMENTS
Northern Chesapeake
39.420143       -76.123344
              -76.035194
              -75.997681
              -76.007698
              -76.010475
              -76.072807
39.401688
39.429420
39.449200
39.449471
39.475323
39.476006
39.475132
39.475132
39.476006
39.475323
39.449471
39.529629
39.540794
39.608994
39.608959
39.609001
39.608971

Gunpowder River
39.316414
39.312862
39.312767
39.303204
39.356564
39.358330
39.326569
39.326477
-76.094421
-76.097580

-76.097580
-76.094421
-76.072807
-76.010475
-75.979271
-76.002899
-76.121094
-76.132683
-76.135147
-76.143379
              -76.331039
              -76.321449
              -76.321190
              -76.296249
              -76.322929
              -76.345024
              -76.361801
              -76.361130
CB1TF             CB1TF1              8
1000 feet southwest of Cherry Tree Point, Aberdeen Proving Ground
North of Chesapeake Haven, Grove Neck
1300 feet southwest of Wroth Point
Turkey Point
Turkey Point, 0.1 miles west southwest of lighthouse
Locust Point on Spesutie Island
East side of Spesutie Narrows bridge
West side of Spesutie Narrows bridge
                  CB1TF2              10
West side of Spesutie Narrows bridge
East side of Spesutie Narrows bridge
Locust Point on Spesutie Island
Turkey Point, 0.1 miles west southwest of lighthouse
Red Point
East side of Carpenter Point
Port Deposit
East side Spencer Island
West side Spencer Island
Just south of Rock Run on western shore

GUNOH            GUNOH1             8
Carroll Island, midway between White Oak and Carroll Points
Carroll Point
Carroll Point
Rickett Point at end of Ricketts Point Road
Maxwell Point
Cunninghill Cove, mouth of unnamed creek
170 feet south of west side of bridge to Carroll Island
170 feet south of east side of bridge to Carroll Island
                 appendix b  •  Maryland's and Virginia's CBP Split Segments Boundary Delineations

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Segment
Description
                                 Chesapeake
                                 Bay Program
                                 Segment
                      Split
                      Segment
                                                Number of Latitude/
                                                Longitude Coordinates
                                                to Follow
39.358330
39.356564
39.412685
                  -76.345024
                  -76.322929
                  -76.400780
Lower Patuxent River
                       GUNOH2
Cunninghill Cove, mouth of unnamed creek
Maxwell Point
Gunpowder Falls, 1500 feet below Route 7
                                                        PAXMH1
                                                                                   3
                                                 12
38.304638
38.319176
38.322941
38.321041
38.386593
38.389153
38.412220
38.411896
38.481140
38.475594
38.342590
38.339634
38.475594
38.481140
38.540684
38.542320
38.321041
38.322941
38.339634
38.342590
38.389153
38.386593
38.446831
38.411896
38.412220
38.433407
-76.421448
-76.420990
-76.451630
-76.451965
-76.498840
-76.506416
-76.542747
-76.544487
-76.647560
-76.662788
-76.500587
-76.499550
-76.662788
-76.647560
-76.668045
-76.678818
-76.451965
-76.451630
-76.499550
-76.500587
-76.506416
-76.498840
-76.492088
-76.544487
-76.542747
-76.540894
PAXMH
Fishing Point
Drum Point
Point of land south of Ship Point and east of Ma Leg Island
Eastern tip of Solomons Island
Mouth of St. Leonard Creek, east side
Petersons Point
Island Creek mouth, east side
Island Creek mouth, Broomes Island side
0.64 miles south of Sandy Point near Buzzard Island
Trent Hall Point
Mouth of Cuckold Creek, north side
Mouth of Cuckold Creek, south side
                       PAXMH2                 4
Trent Hall Point
0.64 miles south of Sandy Point near Buzzard Island
Gods Grace Point near end of Leitchs Wharf Road
Chalk Point, eastern side
                       PAXMH3                 2
Eastern tip of Solomons
Point of land south of Ship Point and east of Ma Leg Island
                       PAXMH4                 2
Mouth of Cuckold Creek, south side
Mouth of Cuckold Creek, north side
                       PAXMH5                 3
Petersons Point
Mouth of St. Leonard Creek, east side
0.25 miles downstream of Parran Road
                       PAXMH6                 3
Island Creek mouth, Broomes Island Side
Island Creek mouth, east side
0.7 miles north of point where Marshall Road ends
Middle Potomac River
38.389680         -77.029268
                                 POTOH               POTOH1                  8
                                 MLW 1 mile southeast of Mathias Point,
                                 just north of Route 639
38.407509         -76.997322     0.65 miles northwest of the town of Popes Creek
38.444935         -77.016396     1.5 miles southeast of Chapel Point, due east of Windmill Point
38.444565         -77.040695     Windmill Point
38.408894         -77.110886     Blossom Point
38.408745         -77.124855     0.15 miles southwest of Benny Gray Point
38.523266         -77.256630     1000 feet southwest of Moss Point
38.524168         -77.284864     MLW midway between Shipping Point and Quantico Pier
      Following the MLW line which defines the Maryland/Virginia boundary to the first point
      described above, except for the following embayments where the boundary is the confluence
      of the mouth of the embayment with the Potomac River:
         Unnamed Embayment (Chopawamsic Island)
         Unnamed Embayment (near Arkendale Road)
         Aquia Creek
         Potomac Creek
appendix b  •   Maryland's and Virginia's CBP Split Segments Boundary Delineations

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Segment
Description

38.444565
38.444935
38.500164
38.408745
38.408894
38.475391
Elk River
39.449200
39.429420
39.474773
39.486473
39.523182
39.525536
39.544392
39.545540

39.545540
39.544392
39.607624
Sassafras River
39.389511
39.372025
39.371868
39.378330
39.378330
39.371868
39.376785
Tangier Sound
37.941404
37.953599
37.953392
37.946050
37.906718
37.911304
37.911789
37.924927
38.015781
38.016033
38.020733
38.020973
38.036049
38.058910
38.064907
38.065315
38.075314
38.075665
38.078552
38.122917
38.125946
38.131565
38.136566
38.232738


-77.040695
-77.016396
-77.026306
-77.124855
-77.110886
-77.130676

-76.007698
-75.997681
-75.940498
-75.923767
-75.871521
-75.874619
-75.855301
-75.876144

-75.876144
-75.855301
-75.822853

-76.040848
-76.101227
-75.955750
-75.961472
-75.961472
-75.955750
-75.806549
-76.083908
-76.052055
-75.993331
-75.943628
-75.952630
-75.883558
-75.837732
-75.848007
-75.845947
-75.846458
-75.856712
-75.856819
-75.868935
-75.868744
-75.866974
-75.866608
-75.870750
-75.871155
-75.877586
-75.937126
-75.941216
-75.948860
-75.959633
-75.972618
Chesapeake Number of Latitude/
Bay Program Split Longitude Coordinates
Segment Segment to Follow
POTOH2 3
Windmill Point
1 .5 miles southeast of Chapel Point, due east of Windmill Point
Port Tobacco Marina (edge of 7.5' quad sheet)
POTOH3 3
0.15 miles southwest of Benny Gray Point
Blossom Point
Wards Run, 0.25 miles upstream of Hill Top Fork
ELKOH ELKOH1 8
Turkey Point
1300 feet southwest of Wroth Point
East of Ford Landing on Veazey Neck
Town Point
West of where the road north from Randalia ends
East side of Welch Point
Paddy Biddle Cove
0.6 miles south of Elkmore
ELKOH2 3
0.6 miles south of Elkmore
Paddy Biddle Cove
Elkton, 500 feet below Route 7
SASOH SASOH1 4
Grove Point
2850 feet east of Howells Point
0.66 miles northwest of Freeman Creek
Cassidy Wharf
SASOH2 3
Cassidy Wharf
0.66 miles northwest of Freeman Creek
350 feet upstream of Route 301
TANMH TANMH1 28
MD/VA boundary, 2.25 miles west of Smith Gut Point
MD/VA boundary, 1450 feet west of Hog Neck
MD/VA boundary, 400 feet east of Horse Hammock
MD/VA boundary, between Smith and Cedar Island
MD/VA boundary, 2.75 miles west of Clump Island
MD/VA boundary, 300 feet north of Green Harbor Island
MD/VA boundary, 1.15 miles south of Cow Gap Island
Eastward Point, on eastern side of Broad Creek
East side of Daugherty Creek Canal
West side of Daugherty Creek Canal
South side of gut southwest of Acre Creek
North side of gut southwest of Acre Creek
700 feet east of Flatcap Point, Janes Island
South shore of Pat Island
NE Pat Island- across gut from Hazard Island
Hazard Island- across gut from Pat Island
Gut between Hazard Cove and Mine Cr.- south side
Gut between Hazard Cove and Mine Cr.- north side
Hazard Island- 1200 feet northeast of tip of Hazard Pt.
Eastern side of Little Deal Island
Eastern point on north side of Little Deal Island
Wenona on Deal Island, north of channel
Twiggs Point
Southern-most point of Clay Island
appendix b  • Maryland's and Virginia's CBP Split Segments Boundary Delineations

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Segment
Description
38.216042
38.215809
38.231964
38.231445

38.232738
38.136566
38.160080
38.160442
38.202679
38.227970
38.243217
38.244740
Manokin River
38.131565
38.125946
38.122917
38.078552
38.075665
38.075314
38.069160
38.069599
38.073784
38.074146
38.133823
38.142979
38.160442
38.160080

38.142979
38.133823
38.172668
Big Annemessex
38.058910
38.036049
38.020973
38.020733
38.016033
38.015781
38.078850
38.074585
38.074146
38.073784
38.069599
38.069160
38.065315
38.064907

38.074585
38.078850
38.087246

-76.032051
-76.032349
-76.134285
-76.135773

-75.972618
-75.959633
-75.932388
-75.929558
-75.890579
-75.893486
-75.906105
-75.941284

-75.948860
-75.941216
-75.937126
-75.877586
-75.871155
-75.870750
-75.855591
-75.853897
-75.848656
-75.848228
-75.827339
-75.821144
-75.929558
-75.932388

-75.821144
-75.827339
-75.732979
River
-75.868744
-75.868935
-75.856819
-75.856712
-75.846458
-75.845947
-75.782249
-75.787170
-75.848228
-75.848656
-75.853897
-75.855591
-75.866608
-75.866974

-75.787170
-75.782249
-75.733032
Chesapeake Number of Latitude/
Bay Program Split Longitude Coordinates
Segment Segment to Follow
Bishops Head Point
Bishops Head Point
Lower Hooper Island between Nancys and Creek Points
Lower Hooper Island between Nancys and Creek Points
TANMH2 8
Southern-most point of Clay Island
Twiggs Point
Upper Thorofare, Deal Island side
Upper Thorofare at the mouth of Moores Gut
1 100 feet west of the tip of Long Point
Nanticoke Point (Stump Point Marsh)
West of Waterview, north of Jones Creek
Sandy Island, northeast of Frog Point
MANMH MANMH1 14
Wenona on Deal Island, north of channel
Eastern point on north side of Little Deal Island
Eastern side of Little Deal Island
Hazard Island, 1200 feet northeast of tip of Hazard Point
Gut between Hazard Cove and Mine Creek, north side
Gut between Hazard Cove and Mine Creek, south side
West part Hazard Island at Shirtpond Cove
East part Hazard Island at Shirtpond Cove
West side of gut heading north from Flatland Cove
East side of gut heading north from Flatland Cove
Cormal Point
Champ Point
Upper Thorofare at the mouth of Moores Gut
Upper Thorofare, Deal Island side
MANMH2 3
Champ Point
Cormal Point
Manokin River confluence with Hall Branch
BIGMH BIGMH1 14
South shore of Pat Island
700 feet east of Flatcap Point, Janes Island
North side of gut southwest of Acre Creek
South side of gut southwest of Acre Creek
West side of Daugherty Creek Canal
East side of Daugherty Creek Canal
Persimmon Point
Charles Point
East side of gut heading north from Flatland Cove
West side of gut heading north from Flatland Cove
East part Hazard Island at Shirtpond Cove
West part Hazard Island at Shirtpond Cove
Hazard Island, across gut from Pat Island
Northeast Pat Island, across gut from Hazard Island
BIGMH2 3
Charles Point
Persimmon Point
1000 feet below confluence with Annemesex Creek
appendix b  • Maryland's and Virginia's CBP Split Segments Boundary Delineations

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Segment
Description
              Chesapeake
              Bay Program
              Segment
                      Split
                      Segment
Number of Latitude/
Longitude Coordinates
to Follow
VIRGINIA SPLIT SEGMENTS
Upper James River
37.227379        -76.946426
37.241180        -76.945686
37.332580        -77.267880
37.334998        -77.274640
37.329826        -77.281128
37.317638        -77.277275
37.334998
37.332580
37.533394
-77.274640
-77.267880
-77.436775
JMSTF               JMSTF1                  6
0.3 miles downstream of Sloop Point
Tettington, 500 feet downstream of road to the river
Most western point of Eppes Island
South of Bermuda Hundred, west of substation
Mouth of small creek east of Shand Creek and north of light
City Point, Hopewell
                      JMSTF2                  3
South of Bermuda Hundred, west of substation
Most western point of Eppes Island
Upstream of Mayos Bridge, as far as Browns Island dam
                     appendix b  •  Maryland's and Virginia's CBP Split Segments Boundary Delineations

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                                                                                 11
                               appendix
           2003  Chesapeake  Bay Program
                   Segmentation  Scheme
           Coordinates Geo-reference  and
     Narrative  Descriptions  by  Jurisdiction
Table C-1. Textual description of coordinates bounding the 2003 Chesapeake Bay Program
Segmentation Scheme segments by jurisdiction.
Segment
Description
              Chesapeake
              Bay Program
              Segment
                                Number of Latitude/
                                Longitude Coordinates
                                to Follow
MARYLAND SEGMENT BOUNDARIES

Northern Chesapeake Bay
39.420143
39.401688
39.429420
39.4492
39.529629
39.540794
39.608994
39.608959
39.609001
39.608971

Bush River
39.339172
39.351715
39.482510

Gunpowder River
39.316414
39.312862
39.312767
39.303204
39.412685
39.326569
39.326477

Middle River
39.286442
39.309422
39.326477
39.326569
39.329792
-76.123344
-76.035194
-75.997681
-76.007698
-75.979271
-76.002899
-76.121094
-76.132683
-76.135147
-76.143379
-76.256592
-76.232986
-76.215805
-76.331039
-76.321449
-76.321190
-76.296249
-76.400780
-76.361801
-76.361130
-76.384102
-76.342964
-76.361130
-76.361801
-76.446922
CB1TF                           10
1000 feet southwest of Cherry Tree Point, Aberdeen Proving Ground
North of Chesapeake Haven, Grove Neck
1300 feet southwest of Wroth Point
Turkey Point
Red Point
East side of Carpenter Point
Port Deposit
East side Spencer Island
West side Spencer Island
Just south of Rock Run on western shore

BSHOH                           3
800 feet upriver of Leges Point
Mouth of Abbey Creek
Church Creek, at the railroad tracks

GUNOH                          7
Carroll Island, midway between White Oak and Carroll Points
Carroll Point
Carroll Point
Rickett Point at end of Ricketts Point Road
Gunpowder Falls, 1500 feet below Route 7
170 feet south of west side of bridge to Carroll Island
170 feet south of east side of bridge to Carroll Island

MIDOH                           5
North shore of Holly Beach
Carroll Island, between Weir Point and Hawthorn Cove
170 feet south of east side of bridge to Carroll Island
170 feet south of west side of bridge to Carroll Island
150 feet downstream of railroad tracks, above Eastern Blvd
   appendix c  •  2003 CBP Segmentation Scheme Coordinates Geo-reference and Narrative Descriptions

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12
Segment
Description
Upper Chesapeake
39.225143
39.207447
39.372025
39.389511
39.401688
39.420143
39.351715
39.339172
39.303204
39.312767
39.312862
39.316414
39.309422
39.286442
39.248951
39.231178
Back River
39.231178
39.248951
39.307873
Patapsco River
39.131855
39.195377
39.275375
Magothy River
39.039185
39.074715
39.114807

Bay
-76.408775
-76.246994
-76.101227
-76.040848
-76.035194
-76.123344
-76.232986
-76.256592
-76.296249
-76.321190
-76.321449
-76.331039
-76.342964
-76.384102
-76.410530
-76.408920

-76.408920
-76.410530
-76.520416
-76.435081
-76.444511
-76.654480
-76.414330
-76.422539
-76.548195
Upper Central Chesapeake
38.995991 -76.413185
38.989105
39.016422
39.029720
39.054563
39.056882
39.207447
39.225143
39.195377
39.131855
39.074715
39.039185
Severn River
38.946095
38.976032
39.079697
South River
38.888672
38.886829
38.907860
38.983105
-76.330185
-76.296959
-76.242516
-76.220229
-76.220903
-76.246994
-76.408775
-76.444511
-76.435081
-76.422539
-76.414330

-76.455879
-76.452377
-76.623398

-76.489876
-76.475616
-76.466240
-76.606232
Chesapeake Number of Latitude/
Bay Program Longitude Coordinates
Segment to Follow
CB2OH 16
North Point State Park, Black Marsh, 1200 feet northeast of small creek
3000 feet south of Route 21 (Tolchester Beach Road)
2850 feet east of Howells Point
Grove Point
North of Chesapeake Haven, Grove Neck
1000 feet southwest of Cherry Tree Point,
Aberdeen Proving Ground
Mouth of Abbey Creek
800 feet upriver of Leges Point
Rickett Point at end of Ricketts Point Road
Carroll Point
Carroll Point
Carroll Island, midway between White Oak and Carroll Points
Carroll Island, between Weir Point and Hawthorn Cove
North shore of Holly Beach
Rocky Point Park, between Claybank and Cedar Points
Swan Point, in line with llth Street
BACOH 3
Swan Point, in line with llth Street
Rocky Point Park, between Claybank and Cedar Points
Moores Run, 1.25 miles above 1-695
PATMH 3
Bodkin Neck between Cedar and Bodkin Points
North Point south of Fort Howard
Gwynns Falls, upstream end of Carroll Park
MAGMH 3
Between Beacon Hill and Tydings on the Bay
East side Gibson Island across from Hapenny Way
End of estuary below Catherine Avenue.
CB3MH 12
500 feet southeast of Moss Pond
0.6 miles northeast of where Route 50 west meets the Bay
Kent Island, 1600 feet north of Grollman Road
Wickes Beach, Eastern Neck Island
Northern tip of Eastern Neck Island, east of Route 445 bridge
South end of Eastern Neck, east of Route 445 bridge
3000 feet south of Route 21 (Tolchester Beach Road)
North Point State Park, Black Marsh, 1200 feet northeast of small creek
North Point south of Fort Howard
Bodkin Neck between Cedar and Bodkin Points
East side Gibson Island across from Hapenny Way
Between Beacon Hill and Tydings on the Bay
SEVMH 3
Bay Ridge, near Bainbridge Avenue
Greenbury Point, 800 feet up east side from the tip
Severn Run, 1100 feet downstream of Veterans Hwy
SOUMH 4
Saunders Point, south of Mayo Beach Park
0.8 miles east of Saunders Point
Southern shore of Thomas Point Park
700 feet upstream of Route 50
 appendix c  • 2003 CBP Segmentation Scheme Coordinates Geo-reference and Narrative Descriptions

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                                                                                                             13
Segment
Description
Rhode River
38.867775
38.864788
38.886829
38.888672
38.883629
West River
38.848892
38.864788
38.867775
38.822258
Middle Central
38.384819
38.393951
38.421051
38.421944
38.487057
38.526997
38.527523
38.672421
38.719185
38.719967
38.752529
38.836365
38.989105
38.995991
38.976032
38.946095
38.907860
38.848892
Chesapeake Number of Latitude/
Bay Program Longitude Coordinates
Segment to Follow

-76.519608
-76.485870
-76.475616
-76.489876
-76.554649

-76.493805
-76.485870
-76.519608
-76.551514
Chesapeake Bay
-76.381432
-76.282532
-76.288589
-76.288742
-76.331779
-76.333771
-76.333801
-76.340698
-76.334084
-76.333054
-76.340332
-76.369392
-76.330185
-76.413185
-76.452377
-76.455879
-76.466240
-76.493805
RHDMH 5
Salt Pond at the mouth of the Rhode River
1.2 miles east southeast of Dutchman Point
0.8 miles east of Saunders Point




Saunders Point, south of Mayo Beach Park
Muddy Creek, 1200 feet below North and South Forks converge
WSTMH 4
Felicity Cove, 250 feet north of Bay Road
1.2 miles east southeast of Dutchman Point
Salt Pond at the mouth of the Rhode River
2400 feet downstream of Shady Side
CB4MH 18
Cove Point
Meekins Neck, 800 feet north of Cattail Island
Meekins Neck, across channel from Point #4
Southern tip of Taylors Island
West side of Oyster Cove, Taylors Island
190 feet south of LCHMH Point #3
East edge of tidal flat north of existing James Island
720 feet along shore north northwest of Blackwalnut Point
South side Knapps Narrows, 275 feet west of Route 33
North side Knapps Narrows, 150 feet west of Route 33
1500 feet northeast of Green Marsh Point
Kent Point
0.6 miles northeast of where Route 50 west meets the Bay
500 feet southeast of Moss Pond
Greenbury Point, 800 feet up east side from the tip
Bay Ridge, near Bainbridge Avenue
Southern shore of Thomas Point Park
Felicity Cove, 250 feet north of Bay Road













Western Branch Patuxent River
38.784637          -76.713326
38.785023          -76.712456
38.797241          -76.729507

Upper Patuxent River
38.700325          -76.695824
38.700516          -76.694160
38.874958          -76.677834
38.785023          -76.712456
38.784637          -76.713326

Middle Patuxent River
38.542320          -76.678818
38.540684          -76.668045
38.700516          -76.694160
38.700325          -76.695824

Lower Patuxent River
38.304638          -76.421448
38.319176          -76.420990
38.540684          -76.668045
38.542320          -76.678818
WBRTF                                   3
Mouth of Western Branch, west side
Mouth of Western Branch, east side
Where Western Branch narrows, north of sewage plant

PAXTF                                    5
On marshy point 0.5 miles north of Hotschkins Branch
0.8 miles north of Jones Point
Near unnamed stream south of Mt. Nebo Branch
Mouth of Western Branch, east side
Mouth of Western Branch, west side

PAXOH                                   4
Chalk Point, eastern side
Gods Grace Point near end of Leitchs Wharf Road
0.8 miles north of Jones Point
On marshy point 0.5 miles north of Hotschkins Branch

PAXMH                                   4
Fishing Point
Drum Point
Gods Grace Point near end of Leitchs Wharf Road
Chalk Point, eastern side
    appendix c  •   2003 CBP Segmentation Scheme Coordinates Geo-reference and Narrative Descriptions

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14
Segment
Description
Lower Central
37.889451
37.885680
37.941404
38.051910
38.231445
38.248581
38.248642
38.295982
38.298965
38.348228
38.349953
38.393951
38.384819
38.319176
38.304638
38.038605
37.909725

Chesapeake Bay
-76.236198
-76.229038
-76.083908
-76.128838
-76.135773
-76.153191
-76.154419
-76.204597
-76.206718
-76.227264
-76.227982
-76.282532
-76.381432
-76.420990
_76.421448
-76.321442
-76.263702
Anacostia River
38.918850
38.918261
38.938805
-76.941951
-76.941198
-76.942162
Upper Potomac River
38.524168
38.523266
38.554722
38.566856
38.702038
38.711002
38.809449
38.805753
38.802464
38.791836
-77.284864
-77.256630
-77.220268
-77.209755
-77.044693
-77.036736
-77.016184
-77.020951
-77.025166
-77.038923
Chesapeake Number of Latitude/
Bay Program Longitude Coordinates
Segment to Follow
CB5MH 17
Smith Point.
MD/VA boundary, 2500 feet southwest of Smith Point
MD/VA boundary, 2.25 miles west of Smith Gut Point
7000 feet north and 2500 feet west of Fog Point, Smith Island
Lower Hooper Island between Nancys and Creek Points.
Lower Hooper Island, northeast end of The Thorofare
Middle Hooper Island, northwest end of The Thorofare
Northwest tip of Middle Hooper Island across from Ferry Point
Ferry Point
Drawbridge, northern Upper Hooper Island
Drawbridge, southern Meekins Neck
Meekins Neck, 800 feet north of Cattail Island
Cove Point
Drum Point
Fishing Point
Point Lookout
East of Ophelia, 300 feet northwest of light
ANATF 3
MD/DC boundary, western shore
MD/DC boundary, eastern side of Route 50 bridge
100 feet below Bladensburg Road bridge
POTTF 10
MLW midway between Shipping Point and Quantico Pier
1000 feet southwest of Moss Point
Stump Neck, east of radio towers and west of Roach Road
Cornwallis Neck, 0.25 miles northwest of Deep Point
Mockley Point, 500 feet west of tip
West of Fort Washington
DC/MD boundary, northern shore of Oxon Creek
DC/MD boundary, southern shore of Oxon Creek
DC/MD boundary, near Fox Ferry Point
DC/MD/VA boundary 200 feet east of Jones Point Park
       Following the MLW line which defines the Maryland/Virginia boundary to the first point described
       above, except for the following embayments where the boundary is the confluence of the mouth
       of the embayment with the Potomac River:
          Hunting Creek                  Unnamed embayment (Mason Neck NWR)
          Little Hunting Creek             Occoquan Bay
          Dogue Creek                   Powells Creek
          Gunston Cove                   Quantico Creek
  Piscataway River
  38.711002
  38.702038
  38.697979
-77.036736
-77.044693
-76.996788
  Mattawoman Creek
  38.566856           -77.209755
  38.554722           -77.220268
  38.591194           -77.124672
PISTF                                    3
West of Fort Washington
Mockley Point, 500 feet west of tip
Piscataway Creek Park, north of sewage disposal plant

MATTF                                   3
Cornwallis Neck, 0.25 miles northwest of Deep Point
Stump Neck, east of radio towers and west of Roach Road
2300 feet downstream of Routes 224/225 (7.5' quad edge)
  appendix c  •  2003 CBP Segmentation Scheme Coordinates Geo-reference and  Narrative Descriptions

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Segment
Description
                                                                                                             15
                   Chesapeake
                   Bay Program
                   Segment
                                           Number of Latitude/
                                           Longitude Coordinates
                                           to Follow
Middle Potomac River
38.389680          -77.029268
38.407509          -76.997322
38.523266          -77.256630
38.524168          -77.284864
                   POTOH                                   4
                   MLW 1 mile southeast of Mathias Point, just north of Route 639
                   0.65 miles northwest of the town of Popes Creek
                   1000 feet southwest of Moss Point
                   MLW midway between Shipping Point and Quantico Pier
      Following the MLW line which defines the Maryland/Virginia boundary to the first point described
      above, except for the following embayments where the boundary is the confluence of the mouth
      of the embayment with the Potomac River:
        Unnamed Embayment (Chopawamsic Island)
        Unnamed Embayment (near Arkendale Road)
        Aquia Creek
        Potomac Creek
Lower Potomac River
37.909777          -76.263700
38.038605          -76.321442
38.407509          -76.997322
38.389680          -77.029268
                   POTMH                                   4
                   MLW east of Ophelia, 300 feet northwest of light
                   Point Lookout
                   0.65 miles northwest of the town of Popes Creek
                   MLW 1 mile southeast of Mathias Point, just north of Route 639
      Following the MLW line which defines the Maryland/Virginia boundary to the first point described
      above, except for the following embayments where the boundary is the confluence of the mouth
      of the embayment with the Potomac River:
        Upper Machodoc Creek
        Rosier Creek
        Monroe Bay
        Mattox Creek
        Popes Creek
        Nomini Bay
        Lower Machodoc Creek
        Unnamed Embayment
          (south of Ragged Point)
Northeast River
39.540794
39.529629
39.608879

Elk River
39.449200
39.429420
39.474773
39.486473
39.523182
39.525536
39.607624
-76.002899
-75.979271
-75.937988
-76.007698
-75.997681
-75.940498
-75.923767
-75.871521
-75.874619
-75.822853
                  Gardner Creek
                  Jackson Creek
                  Bonum Creek
                  Yeocomico River
                  Coan River
                  Presley Creek
                  Hull Creek
                  Hock Creek
                                                              3
NORTF
East side of Carpenter Point
Red Point
750 feet above railroad bridge, 1500 feet below Route 40

ELKOH                                    7
Turkey Point
1300 feet southwest of Wroth Point
East of Ford Landing on Veazey Neck
Town Point
West of where the road north from Randalia ends
East side of Welch Point
Elkton, 500 feet below Route 7
C&D Canal
39.525536
39.523182
39.534616
39.536623
-75.874619
-75.871521
-75.779424
-75.779582
C&DOH
East side of Welch Point
West of where the road north from Randalia ends
MD/DE state line, southern shore
MD/DE state line, northern shore
Bohemia River                          BOHOH
39.486473          -75.923767          Town Point
39.474773          -75.940498          East of Ford Landing on Veazey Neck
39.461319          -75.783554          600 feet below entrance of Sandy Branch
    appendix c  •  2003 CBP Segmentation Scheme Coordinates Geo-reference and Narrative Descriptions

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16
Segment
Description
Sassafras River
39.389511
39.372025
39.376785

-76.040848
-76.101227
-75.806549
Chesapeake
Bay Program
Segment
SASOH
Grove Point
2850 feet east of Howells Point
350 feet upstream of Route 301
Number of Latitude/
Longitude Coordinates
to Follow
3
  Upper Chester River
  39.246002          -75.986618
  39.245350          -75.985878
  39.254440          -75.839638
                   CHSTF
                   Travilla Wharf
                   Marshy point across from Travilla Wharf
                   Andover Branch 900 feet above Route 313
  Middle Chester River
  39.147564          -76.086426
  39.146572          -76.075684
  39.245350          -75.985878
  39.246002          -75.986618
                   CHSOH
                   1100 feet below Browns Creek
                   Northwest Point, west of Riverview
                   Marshy point across from Travilla Wharf
                   Travilla Wharf
Lower Chester
39.029720
39.016422
38.970539
38.970455
39.146572
39.147564
39.056882
39.054563
River
-76.242516
-76.296959
-76.248413
-76.246330
-76.075684
-76.086426
-76.220903
-76.220229
  Eastern Bay
  38.836365
  38.752529
  38.970455
  38.970539
-76.369392
-76.340332
-76.246330
-76.248413
CHSMH                                   8
Wickes Beach, Eastern Neck Island
Kent Island, 1600 feet north of Grollman Road
Route 50, west side of Kent Narrows
Route 50, east side of Kent Narrows
Northwest Point, west of Riverview
1100 feet below Browns Creek
South end of Eastern Neck, east of Route 445 bridge
Northern tip of Eastern Neck Island, east of Route 445 bridge

EASMH                                   4
Kent Point
1500 feet northeast of Green Marsh Point
Route 50, east side of Kent Narrows
Route 50, west side of Kent Narrows
  Upper Choptank River
  38.810635          -75.902985
  38.808270          -75.900391
  38.980827          -75.792931

  Middle Choptank River
  38.653545          -75.959129
  38.647415          -75.952339
  38.808270          -75.900391
  38.810635          -75.902985
                   CHOTF                                   3
                   1850 feet downstream from mouth of Tuckahoe Creek
                   1000 feet downstream of Gilpin Point
                   3500 feet upstream of Route 313 bridge

                   CHOOH                                   4
                   1.5 miles downstream of Bow Knee Point
                   1.05 miles upstream of Cabin Creek
                   1000 feet downstream of Gilpin Point
                   1850 feet downstream from mouth of Tuckahoe Creek
  Lower Choptank River
  38.672421          -76.340698
  38.571705          -76.336029
  38.573353          -76.306503
  38.628571          -76.171051
  38.649193          -76.153114
  38.719967          -76.333054
  38.719185          -76.334084

  Mouth of Choptank River
  38.649193          -76.153114
  38.628571          -76.171051
  38.647415          -75.952339
  38.653545          -75.959129
                   CHOMH1                                 7
                   720 feet along shore north northwest of Blackwalnut Point
                   Hills Point
                   1.6 miles almost due west of Hills Point
                   400 feet west of Castle Haven Point
                   0.9 miles north of Chlora Point
                   North side Knapps Narrows, 150 feet west of Route 33
                   South side Knapps Narrows, 275 feet west of Route 33

                   CHOMH2                                 4
                   0.9 miles north of Chlora Point
                   400 feet west of Castle Haven Point
                   1.05 miles upstream of Cabin Creek
                   1.5 miles downstream of Bow Knee
  appendix c  •  2003 CBP Segmentation Scheme Coordinates Geo-reference and  Narrative Descriptions

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                                                                                                              17
Segment
Description
                        Chesapeake
                        Bay Program
                        Segment
                                           Number of Latitude/
                                           Longitude Coordinates
                                           to Follow
Little Choptank
38.573353
38.571705
38.527523
38.526997
38.487057
38.421944
38.421051
38.398201
38.398605

Honga River
38.231964
38.215809
38.398605
38.398201
38.349953
38.348228
38.298965
38.295982
38.248642
38.248581

Fishing Bay
38.216042
38.232738
38.404148
38.404133
River
    -76.306503
    -76.336029
    -76.333801
    -76.333771
    -76.331779
    -76.288742
    -76.288589
    -76.237053
    -76.237030
    -76.134285
    -76.032349
    -76.237030
    -76.237053
    -76.227982
    -76.227264
    -76.206718
    -76.204597
    -76.154419
    -76.153191
    -76.032051
    -75.972618
    -76.002716
    -76.029968
Upper Nanticoke River
38.538052           -75.745972
38.536259           -75.744843
38.559706           -75.701489
38.561509           -75.701629

Middle Nanticoke River
38.387169          -75.859673
38.381268          -75.839233
38.536259          -75.744843
38.538052          -75.745972
38.553452          -75.774071

Lower Nanticoke River
38.24474           -75.941284
38.243217          -75.906105
38.381268          -75.839233
38.387169          -75.859673
Wicomico River
38.227970
38.202679
38.361588

Tangier Sound
37.941404
37.953599
37.953392
37.946050
37.906718
    -75.893486
    -75.890579
    -75.583061
    -76.083908
    -76.052055
    -75.993331
    -75.943628
    -75.952630
LCHMH                                   9
1.6 miles almost due west of Hills Point
Hills Point
East edge of tidal flat north of existing James Island
190 feet south of LCHMH Point #3
West side of Oyster Cove, Taylors Island
Southern tip of Taylors Island
Meekins Neck, across  channel from Point #6
West shore Great Marsh Creek 1800 feet above Route 335
East shore Great Marsh Creek 1800 feet above Route 335

HNGMH                                   10
Lower Hooper Island between Nancys and Creek Points
Bishops Head Point
Great Marsh Creek, north side, 1900 feet above Route 335
Great Marsh Creek, south side, 1900 feet above Route 335
Drawbridge, southern Meekins Neck
Drawbridge, northern Upper Hooper Island
Ferry Point
Northwest tip of Middle Hooper Island across from Ferry Point
Middle Hooper Island, northwest end of The Thorofare
Lower Hooper Island,  northeast end of The Thorofare

FSBMH                                   4
Bishops Head Point
Southern-most point of Clay Island
Transquaking River west of Thorofare Marsh
Backgarden Pond, southeast shore

NANTF                                    4
600 feet upstream of Molly Horn Branch
375 feet upstream of Plum Creek
MD/DE state line, southern shore
MD/DE state line, northern shore

NANOH                                   5
900 feet downstream of Wapremander Creek
600 feet upstream of Quantico Creek
375 feet upstream of Plum Creek
600 feet upstream of Molly Horn Branch
Marshyhope Creek, 500 feet downstream of Big Indian

NANMH                                   4
Sandy Island, northeast of Frog Point
West of Waterview, north of Jones Creek
600 feet upstream of Quantico Creek
900 feet downstream of Wapremander Creek

WICMH                                   3
Nanticoke Point  (Stump Point Marsh)
1100 feet west of the tip of Long Point
Beaverdam Creek, 3000 feet upstream of Route 12

TANMH                                   33
MD/VA boundary, 2.25 miles west of Smith Gut Point
MD/VA boundary, 1450 feet west of Hog Neck
MD/VA boundary, 400 feet east of Horse Hammock
MD/VA boundary, between Smith and Cedar Islands
MD/VA boundary, 2.75 miles west of Clump Island
    appendix c  •  2003 CBP Segmentation Scheme Coordinates Geo-reference and Narrative Descriptions

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18
Segment
Description
37.911304
37.911789
37.924927
38.015781
38.016033
38.020733
38.020973
38.036049
38.058910
38.064907
38.065315
38.075314
38.075665
38.078552
38.122917
38.125946
38.131565
38.160080
38.160442
38.202679
38.227970
38.243217
38.244740
38.232738
38.216042
38.215809
38.231964
38.231445
Manokin River
38.131565
38.125946
38.122917
38.078552
38.075665
38.075314
38.069160
38.069599
38.073784
38.074146
38.172668
38.160442
38.160080
Big Annemessex
38.058910
38.036049
38.020973
38.020733
38.016033
38.015781
38.087246
38.074146
38.073784
38.069599
38.069160
38.065315
38.064907

-75.883558
-75.837732
-75.848007
-75.845947
-75.846458
-75.856712
-75.856819
-75.868935
-75.868744
-75.866974
-75.866608
-75.870750
-75.871155
-75.877586
-75.937126
-75.941216
-75.948860
-75.932388
-75.929558
-75.890579
-75.893486
-75.906105
-75.941284
-75.972618
-76.032051
-76.032349
-76.134285
-76.135773

-75.948860
-75.941216
-75.937126
-75.877586
-75.871155
-75.870750
-75.855591
-75.853897
-75.848656
-75.848228
-75.732979
-75.929558
-75.932388
River
-75.868744
-75.868935
-75.856819
-75.856712
-75.846458
-75.845947
-75.733032
-75.848228
-75.848656
-75.853897
-75.855591
-75.866608
-75.866974
Chesapeake Number of Latitude/
Bay Program Longitude Coordinates
Segment to Follow
MD/VA boundary, 300 feet north of Green Harbor Island
MD/VA boundary, 1.15 south of Cow Gap Island
Eastward Point, on eastern side of Broad Creek
East side of Daugherty Creek Canal
West side of Daugherty Creek Canal
South side of gut southwest of Acre Creek
North side of gut southwest of Acre Creek
700 feet east of Flatcap Point, Janes Island
South shore of Pat Island
Northeast Pat Island, across gut from Hazard Island
Hazard Island, across gut from Pat Island
Gut between Hazard Cove and Mine Creek, south side
Gut between Hazard Cove and Mine Creek, north side
Hazard Island, 1200 feet northeast of tip of Hazard Point
Eastern side of Little Deal Island
Eastern point on north side of Little Deal Island
Wenona on Deal Island, north of channel
Upper Thorofare, Deal Island side
Upper Thorofare at the mouth of Moores Gut
1100 feet west of the tip of Long Point
Nanticoke Point, Stump Point Marsh
West of Waterview, north of Jones Creek
Sandy Island, northeast of Frog Point
Southern-most point of Clay Island
Bishops Head Point
Bishops Head Point
Lower Hooper Island between Nancys and Creek Point
Lower Hooper Island between Nancys and Creek Point
MANMH 13
Wenona on Deal Island, north of channel
Eastern point on north side of Little Deal Island
Eastern side of Little Deal Island
Hazard Island, 1200 feet northeast of tip of Hazard Point
Gut between Hazard Cove and Mine Creek, north side
Gut between Hazard Cove and Mine Creek, south side
West part Hazard Island at Shirtpond Cove
East part Hazard Island at Shirtpond Cove
West side of gut heading north from Flatland Cove
East side of gut heading north from Flatland Cove
Manokin River confluence with Hall Branch
Upper Thorofare at the mouth of Moores Gut
Upper Thorofare, Deal Island side
BIGMH 13
South shore of Pat Island
700 feet east of Flatcap Point, Janes Island
North side of gut southwest of Acre Creek
South side of gut southwest of Acre Creek
West side of Daugherty Creek Canal
East side of Daugherty Creek Canal
1000 feet below confluence with Annemesex Creek
East side of gut heading north from Flatland Cove
West side of gut heading north from Flatland Cove
East part Hazard Island at Shirtpond Cove
West part Hazard Island at Shirtpond Cove
Hazard Island, across gut from Pat Island
Northeast Pat Island, across gut from Hazard Island
 appendix c  • 2003 CBP Segmentation Scheme Coordinates Geo-reference and Narrative Descriptions

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                                                                                                      19
Segment
Description
Chesapeake
Bay Program
Segment
Number of Latitude/
Longitude Coordinates
to Follow
Upper Pocomoke River
38.062958          -75.617470
38.062840          -75.616302
38.183201          -75.391991
POCTF
West of Unionville, Somerset County side
West of Unionville, Worcester County side
Snow Hill, 1900 feet upstream of Route 12
3
Middle Pocomoke River
37.966858 -75.674603
37.951850 -75.676225
37.949924 -75.667353
37.945125 -75.656153
37.946728 -75.648248
37.966423 -75.648553
37.994347 -75.624314

37.994449 -75.623122
38.062840 -75.616302
38.062958 -75.617470
Lower Pocomoke River
37.924927 -75.848007
37.911789 -75.837732
37.912169 -75.801148
37.941226 -75.761753
37.954523 -75.704753
37.955327 -75.691653
37.951850 -75.676225
37.966858 -75.674603
DELAWARE SEGMENT BOUNDARIES
C&D Canal
39.536623 -75.779582
39.534616 -75.779424
39.542904 -75.724831
Nanticoke
38.561509 -75.701629
38.559706 -75.701489
38.642723 -75.606522
POCOH 10
On mainland 4000 feet northwest of Fair Island
MD/VA boundary, Pocomoke Sound
MD/VA boundary, Pocomoke Sound
MD/VA boundary south of Williams Point
MD/VA boundary, Pocomoke Sound
MD/VA boundary, 700 feet upstream of mouth
Intersection of Somerset County and Worcester County, MD
County, VA
Worcester/ Accomack Co. boundary, eastern shore
West of Unionville, Worcester County side
West of Unionville, Somerset County side
POCMH 8
Eastward Point, on eastern side of Broad Creek
MD/VA boundary, 1.15 south of Cow Gap Island
MD/VA boundary, Pocomoke Sound
MD/VA boundary, Pocomoke Sound
MD/VA boundary, Pocomoke Sound
MD/VA boundary, Pocomoke Sound
MD/VA boundary, Pocomoke Sound
On mainland 4000 feet northwest of Fair Island

C&DOH 3
MD/DE state line, northern shore
MD/DE state line, southern shore
North of Summit Bridge and 250 feet east of the power line
NANTF 3
MD/DE state line, northern shore
MD/DE state line, southern shore
Seaford, DE just above Middleford Road







and Accomack






















DISTRICT OF COLUMBIA SEGMENT BOUNDARIES
Upper Potomac River
38.791836 -77.038923
38.802464 -77.025166
38.805753 -77.020951
38.809449 -77.016184
38.850609 -77.018761
38.850546 -77.022368
38.856720 -77.022491
38.929682 -77.115663
38.929522 -77.116453
Anacostia River
38.856720 -77.022491
38.850546 -77.022368
38.850609 -77.018761
38.918261 -76.941198
38.918850 -76.941951
POTTF 9
DC/MD/VA boundary 200 feet east of Jones Point Park
DC/MD boundary, near Fox Ferry Point
DC/MD boundary, southern shore of Oxon Creek.
DC/MD boundary, northern shore of Oxon Creek.





Border between Boiling Air Force Base and US Naval Station
2250 feet due south of western side of Hains Point
Hains Point
Chain Bridge, eastern shore
MHW, Chain Bridge, western shore
ANATF 5
Hains Point
2250 feet due south of western side of Hains Point







Border between Boiling Air Force Base and US Naval Station
DC/MD boundary, eastern side of Route 50 bridge
DC/MD boundary, western shore


   appendix c  •  2003 CBP Segmentation Scheme Coordinates Geo-reference and Narrative Descriptions

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20
                                        Chesapeake                                Number of Latitude/
  Segment                               Bay Program                               Longitude Coordinates
  Description                            Segment                                   to Follow

  VIRGINIA SEGMENT BOUNDARIES

  Lower Central Chesapeake Bay         CB5MH                                   6
  37.619465          -76.280251         Fleets Island, at end of road north of Windmill Point
  37.797581          -76.025650         3 miles west northwest of Tangier Sound Light
  37.941404          -76.083908         MD/VA boundary, 2.25 miles west of Smith Gut Point
  37.885680          -76.229038         MD/VA boundary, 2500 feet southwest of Smith Point
  37.889451          -76.236198         Smith Point
  37.909725          -76.263702         East of Ophelia, 300 feet northwest of light

  Upper Potomac River                   POTTF                                    5
  38.524181          -77.285294         Midway between Shipping Point and Quantico Pier
  38.524168          -77.284864         MLW midway  between Shipping Point and Quantico Pier
  38.791836          -77.038923         DC/MD/VA boundary 200 feet east of Jones Point Park
  38.929522          -77.116453         MHW, Chain Bridge, western shore
  38.929473          -77.116695         Chain Bridge, western shore

        Following the MLW line which defines the Maryland/Virginia boundary to the first point described
        above. This segment contains the following embayments where the Maryland/Virginia boundary
        is the confluence of the mouth of the embayment with the Potomac River:
           Hunting Creek                 Unnamed embayment (Mason Neck NWR)
           Little Hunting Creek            Occoquan Bay
           Dogue Creek                   Powells Creek
           Gunston Cove                  Quantico Creek

  Middle Potomac River                  POTOH                                   4
  38.389660          -77.029305         1 mile southeast of Mathias Point, just north of Route 639
  38.389680          -77.029268          MLW 1 mile southeast of Mathias Point, just north of Route 639
  38.524168          -77.284864         MLW midway  between Shipping Point and Quantico Pier
  38.524181          -77.285294         Midway between Shipping Point and Quantico Pier

        Following the MLW line which defines the Maryland/Virginia boundary to the first point described
        above. This segment contains the following embayments where the Maryland/Virginia boundary
        is the confluence of the mouth of the embayment with the Potomac River:
           Unnamed Embayment (Chopawamsic Island)   Aquia Creek
           Unnamed Embayment (near Arkendale Road)   Potomac Creek

  Lower Potomac River                   POTMH                                   4
  37.909725          -76.263702         East of Ophelia, 300 feet northwest of light
  37.909777          -76.263700         MLW east of Ophelia, 300 feet northwest of light
  38.389680          -77.029268          MLW 1 mile southeast of Mathias Point, just north of Route 639
  38.389660          -77.029305         1 mile southeast of Mathias Point, just north of Route 639
        Following the MLW line which defines the Maryland/Virginia boundary to the first point described
        above. This segment contains the following embayments where the Maryland/Virginia boundary
        is the confluence of the mouth of the embayment with the Potomac River:
           Upper Machodoc Creek          Gardner Creek
           Rosier Creek                    Jackson Creek
           Monroe Bay                    Bonum Creek
           Mattox Creek                   Yeocomico River
           Popes Creek                    Coan River
           Nomini Bay                    Presley Creek
           Lower Machodoc Creek          Hull Creek
           Unnamed Embayment            Hock Creek
            (south of Ragged Point)
  appendix c  •  2003 CBP Segmentation Scheme Coordinates Geo-reference and Narrative Descriptions

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                                                                                                              21
Segment
Description
Chesapeake
Bay Program
Segment
Number of Latitude/
Longitude Coordinates
to Follow
Middle Pocomoke River
37.951850           -75.676225
37.941841           -75.677261
37.994449           -75.623122
37.994347           -75.624314
37.966423
37.946728
37.945125
37.949924
-75.648553
-75.648248
-75.656153
-75.667353
Lower Pocomoke River
37.911789
37.806671
37.806152
37.787926
37.941841
37.951850
37.955327
37.954523
37.941226
37.912169
Tangier Sound
37.792580
37.781960
37.846237
37.911789
37.911304
37.906718
37.946050
37.953392
37.953599
37.941404
37.797581
Western Lower
37.084686
37.087894
37.083694
37.729496
37.619465
37.613708
37.512447
37.473808
37.462313
37.459854
37.309418
37.105408
Eastern Lower
37.083694
37.010635
37.111908
37.115574
37.787926
37.806152
37.806671
37.846237
-75.837732
-75.755676
-75.755272
-75.741074
-75.677261
-75.676225
-75.691653
-75.704753
-75.761753
-75.801148

-76.032707
-75.873726
-75.786530
-75.837732
-75.883558
-75.952630
-75.943628
-75.993331
-76.052055
-76.083908
-76.025650
Chesapeake Bay
-76.271126
-76.268974
-76.165154
-76.123352
-76.280251
-76.280586
-76.285423
-76.263008
-76.257705
-76.257225
-76.275558
-76.283676
Chesapeake Bay
-76.165154
-75.965233
-75.933571
-75.970390
-75.741074
-75.755272
-75.755676
-75.786530
POCOH                                   8
MD/VA boundary, Pocomoke Sound
Between Pig Point and Shad Landing
Worcester/Accomack County boundary, eastern shore
Intersection of Somerset County and Worcester County, MD
and Accomack County, VA
MD/VA boundary, 700 feet upstream of mouth
MD/VA boundary, Pocomoke Sound
MD/VA boundary south of Williams Point
MD/VA boundary, Pocomoke Sound

POCMH                                   10
MD/VA boundary, 1.15 miles south of Cow Gap Island
Scott Island, west side
Scott Island, south side
South of Webb Island, between Deep Creek and Doe Creek
Between Pig Point and Shad Landing
MD/VA boundary, Pocomoke Sound
MD/VA boundary, Pocomoke Sound
MD/VA boundary, Pocomoke Sound
MD/VA boundary, Pocomoke Sound
MD/VA boundary, Pocomoke Sound

TANMH                                   11
3.25 miles west,  0.3 miles north of Tangier Sound Light
1 mile southeast of south tip of Watts Island, just east of quad bound.
0.57 miles west southwest of flashing red light at tip of Guilford Flats
MD/VA boundary, 1.15 miles south of Cow Gap Island
MD/VA boundary, 300 feet north of Green Harbor Island
MD/VA boundary, 2.75 miles west of Clump Island
MD/VA boundary, between Smith and Cedar Islands
MD/VA boundary, 400 feet east of Horse Hammock
MD/VA boundary, 1450 feet west of Hog Neck
MD/VA boundary, 2.25 miles west of Smith Gut Point
3 miles west northwest of Tangier Sound Light

CB6PH                                    12
900 feet southwest of abandoned lighthouse north northeast of Grand View
400 feet northeast of abandoned lighthouse north northeast of Grand View
6 miles east of Grand View, 10.2 miles west of Fishermans Island
10 miles east of Hughlett Point, approximately 1 mile north of wreck
Fleets Island, at end of road north of Windmill Point
Windmill Point
Gwynn Island, east side of northern end
Gwynn Island, 0.25  miles northeast of Sandy Point tip
0.08 miles north northeast from northern tip of Rigby Island
Rigby Island, east side of northern end
North side of Deep Creek, north of New Point Comfort
East side of Northend  Point

CB7PH                                    11
6 miles east of Grand View, 10.2 miles west of Fishermans Island
5 miles south of Fishermans Island, 6.3 miles northeast of Cape Henry
0.68 miles west of Smith Island, 2 miles east of Route 13
300 feet due north of light in channel, 260 feet west of Route 13
South of Webb Island, between Deep Creek and Doe Creek
Scott Island, south side
Scott Island, west side
0.57 miles southwest of flashing red light at tip of Guilford Flats
    appendix c  •  2003 CBP Segmentation Scheme Coordinates Geo-reference and Narrative Descriptions

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22
Segment
Description
37.781960
37.792580
37.729496

-75.873726
-76.032707
-76.123352
Chesapeake Number of Latitude/
Bay Program Longitude Coordinates
Segment to Follow
1 mile southeast of south tip of Watts Island, just east of quad boundary
3.25 miles west, 0.3 miles north of Tangier Sound Light
10 miles east of Hughlett Point, approximately 1 mile north of wreck
  Mouth of the
  36.967342
  36.907486
  36.907352
  36.919083
  37.010635
  37.083694
  37.087894
  37.084686
  37.017586
  37.002299
Chesapeake Bay
       -76.296967
       -76.093224
       -76.090591
       -75.993782
       -75.965233
       -76.165154
       -76.268974
       -76.271126
       -76.297104
       -76.300643
  Upper Rappahannock River
  38.082386           -76.979980
  38.089813           -76.973442
  38.312946           -77.462326

  Middle Rappahannock River
  37.979389           -76.924652
  37.988907           -76.895859
  38.089813           -76.973442
  38.082386           -76.979980

  Lower Rappahannock River
  37.558598           -76.297974
  37.558395           -76.283516
  37.613708           -76.280586
  37.653767           -76.457794
  37.649799           -76.496513
  37.988907           -76.895859
  37.979389           -76.924652
  Corrotoman River
  37.649799
  37.653767
  37.769997

  Piankatank River
  37.473808
  37.512447
  37.558395
  37.558598
  37.577724
  37.459854
  37.462313
       -76.496513
       -76.457794
       -76.478516
       -76.263008
       -76.285423
       -76.283516
       -76.297974
       -76.583008
       -76.257225
       -76.257705
  Upper Mattaponi River
  37.656723           -76.882187
  37.658237           -76.881470
  37.788898           -77.104210
CB8PH                                     10
Where 1-64 south meets Willoughby Spit
West side of Lesner Bridge (Route 60)
East side of Lesner Bridge (Route 60)
Fort Story, 2000 feet north of North Virginia Beach
5 miles south of Fishermans Island, 6.3 miles northeast of Cape Henry
6 miles east of Grand View,  10.2 miles west of Fishermans Island
400 feet northeast of abandoned lighthouse north northeast of Grand View
900 feet southwest of abandoned lighthouse north northeast of of Grand View
Fort Monroe Military Reservation, west of Thimble Shoal
0.32 miles east northeast of Old Point Comfort lighthouse

RPPTF                                     3
430 feet east of the mouth of Hutchinson Swamp
0.7 miles upstream of Peedee Creek
Fredericksburg, 300 feet above aqueduct

RPPOH                                    4
1000 feet downstream (southeast) of Jenkins Landing
Mulberry Island, 0.33 miles upstream (northwest) of Mulberry Point
0.7 miles upstream of Peedee Creek
430 feet east of the mouth of Hutchinson Swamp

RPPMH                                    7
Stingray Point
0.8 miles east of Stingray Point (point 1)
Windmill Point
0.5 miles northwest of Orchard Point
Approximately 0.25 miles south of Whitehouse Creek mouth
Mulberry Island, 0.33 miles upstream (northwest) of  Mulberry Point
1000 feet downstream (southeast) of Jenkins Landing

CRRMH                                    3
Approximately 0.25 miles south of Whitehouse Creek mouth
0.5 miles northwest of Orchard Point
Western Branch, 400 feet upstream of Route 3

PIAMH                                    7
Gwynn Island, 0.25 miles northeast of Sandy Point tip
Gwynn Island, east side of northern end
0.8 miles east of Stingray Point (RPPMH point 1)
Stingray Point
Dragon Swamp, 0.5 miles below Zion Branch
Rigby Island, east side of northern end
0.08 miles north northeast from northern tip of Rigby Island

MPNTF                                  3
Across the river  from Courthouse Landing
1000 feet upstream of Mitchell Hill Creek
Aylett, 800 feet above Route 360 bridge
  appendix c  •  2003 CBP Segmentation Scheme Coordinates Geo-reference and Narrative Descriptions

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                                                                                                             23
Segment
Description
                   Chesapeake
                   Bay Program
                   Segment
                                           Number of Latitude/
                                           Longitude Coordinates
                                           to Follow
Lower Mattaponi River
37.538822          -76.791504
37.537014          -76.786194
37.658237          -76.881470
37.656723          -76.882187

Upper Pamunkey River
37.543476          -76.976799
37.543507          -76.974968
37.689621          -77.214119

Lower Pamunkey River
37.532749          -76.810616
37.535069          -76.805229
37.543507          -76.974968
37.543476          -76.976799
Middle York River
37.288246
37.316483
37.537014
37.538822
37.535069
37.532749

Lower York River
37.223167
37.262413
37.316483
37.288246

Mobjack Bay
37.105408
37.309418
37.262413
37.223167

Upper James River
37.227379
37.241180
37.533394
37.329826
37.317638

Appomattox River
37.317638
37.329826
37.233662

Middle James River
37.154785
37.202007
37.245670
37.245888
37.241180
37.227379
-76.598122
-76.577034
-76.786194
-76.791504
-76.805229
-76.810616
-76.420166
-76.390877
-76.577034
-76.598122
-76.283676
-76.275558
-76.390877
-76.420166
-76.946426
-76.945686
-77.436775
-77.281128
-77.277275
-77.277275
-77.281128
-77.407867
-76.670403
-76.626305
-76.871529
-76.897522
-76.945686
-76.946426
MPNOH                                  4
Lord Delaware Bridge (Route 33), West Point side
Lord Delaware Bridge (Route 33), east side
1000 feet upstream of Mitchell Hill Creek
Across the river from Courthouse Landing

PMKTF                                  3
0.75 miles upstream of creek at Cook Landing
Cohoke Marsh, 0.9 miles downstream of Turkey Creek
2000 feet upstream of Totopotomoy Creek

PMKOH                                  4
Eltham Bridge (Routes. 30/33), west side
Eltham Bridge (Routes 30/33), east side (West Point)
Cohoke Marsh, 0.9 miles downstream of Turkey Creek
0.75 miles upstream of creek at Cook Landing

YRKMH                                  6
Naval Supply Center, Cheatham Annex
Blundering Point, 1000 feet northwest of tip
Lord Delaware Bridge (Route 33), east side
Lord Delaware Bridge (Route 33), West Point side
Eltham Bridge (Routes 30/33), east side (West Point)
Eltham Bridge (Routes 30/33), west side

YRKPH                                  4
Sandbox, northeast tip of Goodwin Neck
Jenkins Neck, between Hog Island and Sandy Point
Blundering Point, 1000 feet northwest of tip
Naval Supply Center, Cheatham Annex

MOBPH                                  4
East side of Northend Point
North side of Deep Creek, north of New Point Comfort
Jenkins Neck, between Hog Island and Sandy Point
Sandbox, northeast tip of Goodwin Neck

JMSTF                                   5
0.3 miles downstream of Sloop Point
Tettington, 500 feet downstream of road to the river
Upstream of Mayos Bridge, as far as Browns Island dam
Mouth of small creek east of Shand Creek and north of light
City Point, Hopewell

APPTF                                    3
City Point, Hopewell
Mouth of small creek east of Shand Creek and north of light
Petersburg, 1500 feet upstream of Route 1 bridge

JMSOH                                  6
0.7 miles north of Hunnicut Creek, south of Hog Island
Near Carters Grove Home, 1.25 miles southeast of Grove Creek
1300 feet north northwest of Barrets Point
During Point
Tettington, 500 feet downstream of road to the river
0.3 miles downstream of Sloop Point
    appendix c •  2003 CBP Segmentation Scheme Coordinates Geo-reference and  Narrative Descriptions

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24
  Segment
  Description
                   Chesapeake
                   Bay Program
                   Segment
Number of Latitude/
Longitude Coordinates
to Follow
  Chickahominy River
  37.245888           -76.897522
  37.245670           -76.871529
  37.429108           -77.028267

  Lower James River
  36.923653           -76.385788
  36.964985           -76.410645
  37.202007           -76.626305
  37.154785           -76.670403

  Mouth of James River
  36.967342           -76.296967
  37.002299           -76.300643
  37.017586           -76.297104
  36.964985           -76.410645
  36.923653           -76.385788
  36.923153           -76.354614
  36.925476           -76.329292

  Western Branch Elizabeth River
  36.856030           -76.331711
  36.860474           -76.341103
  36.818913           -76.399612

  Southern Branch Elizabeth River
  36.839340           -76.290077
  36.839539           -76.295753
  36.723557           -76.248955
                    CHKOH                                  3
                    During Point
                    1300 feet north northwest of Barrets Point
                    Above Holly Landing, 150 feet below temporary divergence

                    JMSMH                                  4
                    Northwest corner of Craney Island Disposal Area
                    Newport News Point, just south of Lincoln Park
                    Near Carters Grove Home, 1.25 miles southeast of Grove Creek
                    0.7 miles north of Hunnicut Creek, south of Hog Island

                    JMSPH                                   7
                    Where 1-64 S meets Willoughby Spit
                    0.32 miles east northeast of Old Point Comfort lighthouse
                    Fort Monroe Military Reservation, west of Thimble Shoal
                    Newport News Point, just south of Lincoln Park
                    Northwest corner of Craney Island Disposal Area
                    Northeast corner of Craney Island Disposal Area
                    Northwest side of pond 1950 feet south of Sewells Point Docks

                    WBEMH                                   3
                    Pinner Point, northwest corner at railroad tracks
                    Lovett Point, southeast corner
                    1800 feet south of Hodges Ferry Bridge (Route 337)

                    SBEMH                                    3
                    930 feet west of the south end of Berkley Bridge
                    250 feet south of light and 2500 feet north of Downtown Tunnel
                    Great Bridge Lock
  Eastern Branch Elizabeth River
  36.843090           -76.289368
  36.839779           -76.289261
  36.827354           -76.167595
                    EBEMH
                    The Waterside
                    700 feet west of the south end of Berkley Bridge
                    300 feet downstream of Route 165
 3
  Lafayette River                         LAFMH                                    3
  36.903587           -76.323219          Tanners Point
  36.901581           -76.314362          1400 feet due east of light southeast of Tanners Point
  36.865322           -76.257843          Calvary Cemetery, 3400 feet upstream of Route 168

  Mouth to mid-Elizabeth River           ELIPH                                    10
  36.925476           -76.329292          Northwest side of pond 1950 feet south of Sewells Point Docks
  36.923153           -76.354614          Northeast corner of Craney Island Disposal Area
  36.860474           -76.341103          Lovett Point, southeast corner
  36.856030           -76.331711          Pinner Point, northwest corner at railroad tracks
  36.839539           -76.295753          250 feet south of  light and 2500 feet north of Downtown Tunnel
  36.839340           -76.290077          930 feet west of the south end of Berkley Bridge
  36.839779           -76.289261          700 feet west of the south end of Berkley Bridge
  36.843090           -76.289368          The Waterside
  36.901581           -76.314362          1400 feet due east of light southeast of Tanners Point
  36.903587           -76.323219          Tanners Point
  Lynnhaven River
  36.907352
  36.907486
                    LYNPH
-76.090591           East side of Lesner Bridge (Route 60)
-76.093224           West side of Lesner Bridge (Route 60)
  appendix c  •  2003 CBP Segmentation Scheme Coordinates Geo-reference and Narrative Descriptions

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            Chesapeake Bay Program
             A Watershed Partnership

 U.S. Environmental Protection Agency
              Region III
    Chesapeake Bay Program Office
         Annapolis, Maryland
           1-800-YOUR-BAY


 Monitoring and Analysis Subcommittee
                 and
Tidal Monitoring and Analysis Workgroup

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