Bench Mark Sheet for 8653365, Washington, Tar River NC

Superseded Epoch

Large map location marker Station Location
Small red map location marker Published bench mark
Small blue map location marker Unpublished bench mark

Bench mark positions only appear on the map if their coordinates in the CO-OPS database are at the precision of degrees/minutes/seconds/and tenths of seconds. If the coordinates are less precise, the mark will not appear.

Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  8

                                                                                
Station ID: 8653365                         PUBLICATION DATE:  12/04/2012
Name:       WASHINGTON, TAR RIVER, PAMLICO RIVER              
            NC
NOAA Chart: 11554                           Latitude:   35° 32.7' N (  35.54500)
USGS Quad:  WASHINGTON, NC                  Longitude:  77°  3.7' W ( -77.06170)


To reach the tidal bench marks from the north end of the US Highway 17 Business
Bridge (North Bridge Street) over the Tar River and the intersection with West
Main Street, proceed 0.25 km (0.2 mi) ESE on West Main Street to the
intersection with West Stewart Parkway, turn right onto West Stewart Parkway and
proceed south 0.1 km (0.05 mi).  The bench marks are in the vicinity of the
Washington Waterfront Marina and along West Main Street and North Market Street.
 The tide gauge is located next to the dock attendant office at the NW end of
the Washington Waterfront Marina.


                         T I D A L   B E N C H   M A R K S
                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  8

                                                                                
Station ID: 8653365                         PUBLICATION DATE:  12/04/2012
Name:       WASHINGTON, TAR RIVER, PAMLICO RIVER              
            NC
NOAA Chart: 11554                           Latitude:   35° 32.7' N (  35.54500)
USGS Quad:  WASHINGTON, NC                  Longitude:  77°  3.7' W ( -77.06170)


                         T I D A L   B E N C H   M A R K S


                 PRIMARY BENCH MARK STAMPING:  Z 25 1932
                         DESIGNATION:          Z 25

MONUMENTATION:           Survey disk                           VM#:        20451
AGENCY:                  USC&GS                                IDB PID#:  EY0446
SETTING CLASSIFICATION:  Building steps                        OPUS PID:        
LATITUDE:   35° 32.6' N (  35.54319)          LONGITUDE:  77°  3.2' W ( -77.05414)


The primary bench mark is a disk set 0.3 m (1 ft) above the municipal building
sidewalk, 14.9 m (49.0 ft) southeast of centerline of Market Street, 9.0 m (29.6
ft) northeast of centerline of West Second Street, 4.9 m (16.2 ft) east of a
fire hydrant and 4.7 m (15.3 ft) south-southeast of the flagpole. 



                         BENCH MARK STAMPING:  3365 A 2012
                         DESIGNATION:          865 3365 A

MONUMENTATION:           Survey disk                           VM#:        20445
AGENCY:                  NOS                                   IDB PID#:        
SETTING CLASSIFICATION:  Seawall                               OPUS PID:        
LATITUDE:   35° 32.6' N (  35.54278)          LONGITUDE:  77°  3.5' W ( -77.05889)


The bench mark is a disk set in the top of a concrete seawall, 24.25 m (79.6 ft)
west of a 0.6 m (2.0 ft) diameter oak tree, 14.16 m (46.5 ft) west-southwest of
a flag pole, 8.46 m (27.8 ft) south-southwest of a light post on the seawall,
7.75 m (25.4 ft) northwest of a light post on the seawall, 0.44 m (1.4 ft) east
of the outside corner of the seawall and 0.10 m (0.3 ft) east of the metal
railing on the seawall.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  8

                                                                                
Station ID: 8653365                         PUBLICATION DATE:  12/04/2012
Name:       WASHINGTON, TAR RIVER, PAMLICO RIVER              
            NC
NOAA Chart: 11554                           Latitude:   35° 32.7' N (  35.54500)
USGS Quad:  WASHINGTON, NC                  Longitude:  77°  3.7' W ( -77.06170)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  3365 B 2012
                         DESIGNATION:          865 3365 B

MONUMENTATION:           Survey disk                           VM#:        20446
AGENCY:                  NOS                                   IDB PID#:        
SETTING CLASSIFICATION:  Seawall                               OPUS PID#: BBCS66
LATITUDE:   35° 32.5' N (  35.54206)          LONGITUDE:  77°  3.5' W ( -77.05783)


The bench mark is a disk set in the top of a concrete seawall, 18.38 m (60.3 ft)
south-southeast of a light post on the southwest side of West Stewart Parkway,
14.33 m (47.0 ft) west of a light post on the southwest side of West Stewart
Parkway, 12.60 m (41.3 ft) southwest of the top back of curb on the southwest
side of West Stewart Parkway, 8.11 m (26.6 ft) northwest of a light post on the
seawall, 5.93 m (19.5 ft) southeast of a light post on the seawall, 0.48 m (1.6
ft) northwest of a concrete pillar on the seawall, 0.35 m (1.1 ft) northeast of
the seaward edge of the seawall and 0.09 m (0.3 ft) northeast of a metal
railing. 

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  8

                                                                                
Station ID: 8653365                         PUBLICATION DATE:  12/04/2012
Name:       WASHINGTON, TAR RIVER, PAMLICO RIVER              
            NC
NOAA Chart: 11554                           Latitude:   35° 32.7' N (  35.54500)
USGS Quad:  WASHINGTON, NC                  Longitude:  77°  3.7' W ( -77.06170)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  BRIDGE 1965
                         DESIGNATION:          BRIDGE

MONUMENTATION:           Survey disk                           VM#:        20447
AGENCY:                  NC Geodetic Survey                    IDB PID#:  EY1496
SETTING CLASSIFICATION:  Concrete bridge                       OPUS PID:        
LATITUDE:   35° 32.7' N (  35.54486)          LONGITUDE:  77°  3.7' W ( -77.06094)


The bench mark is a standard N.C. brass traverse disk, cemented in the sidewalk
flush with the surface of the sidewalk, 30.5 m (100 ft) north of the north end
of U.S. 17 Bridge over Pamlico River and in sidewalk in north quadrant of
intersection, 20.2 m (66.4 ft) southwest of a power pole with reference tag,
17.3 m (56.7 ft) south of southwest corner of Gulf service station, 14.1 m (46.3
ft) northwest of centerline of highway, 7.6 m (24.9 ft) northeast of centerline
main street and 6.2 m (20.4 ft) west of a power pole with reference tag.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  8

                                                                                
Station ID: 8653365                         PUBLICATION DATE:  12/04/2012
Name:       WASHINGTON, TAR RIVER, PAMLICO RIVER              
            NC
NOAA Chart: 11554                           Latitude:   35° 32.7' N (  35.54500)
USGS Quad:  WASHINGTON, NC                  Longitude:  77°  3.7' W ( -77.06170)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  HARRIS 1979
                         DESIGNATION:          HARRIS

MONUMENTATION:           Survey disk                           VM#:        20448
AGENCY:                  NC Geodetic Agency                    IDB PID#:  EY4271
SETTING CLASSIFICATION:  Sidewalk                              OPUS PID:        
LATITUDE:   35° 32.6' N (  35.54261)          LONGITUDE:  77°  3.4' W ( -77.05639)


The bench mark is a standard disk set in drilled hole in concrete sidewalk, 3.3
m (10.8 ft) south-southwest of curb of main street, 3.1 m (10.1 ft) southwest of
metal traffic signal post, 2.3 m (7.6 ft) northeast of northwest corner of river
town mall building, and 2.0 m (6.7 ft) south-southeast of fire hydrant. 

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  8

                                                                                
Station ID: 8653365                         PUBLICATION DATE:  12/04/2012
Name:       WASHINGTON, TAR RIVER, PAMLICO RIVER              
            NC
NOAA Chart: 11554                           Latitude:   35° 32.7' N (  35.54500)
USGS Quad:  WASHINGTON, NC                  Longitude:  77°  3.7' W ( -77.06170)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  WASHINGTON 1932
                         DESIGNATION:          WASHINGTON

MONUMENTATION:           Survey disk                           VM#:        20449
AGENCY:                  USC&GS                                IDB PID#:  EY0448
SETTING CLASSIFICATION:  Exterior of concrete building         OPUS PID:        
LATITUDE:   35° 32.6' N (  35.54294)          LONGITUDE:  77°  3.4' W ( -77.05703)


The bench mark is a disk set vertically in the Bank of America buiding, 12.00 m
(39.4 ft) west-northwest of the southeast corner of the building, 4.83 m (15.8
ft) north-northeast of the top back of curb on the north side of West Main
Street, 4.81 m (15.8 ft) east of a stop light at the northeast corner of the
intersection of North Respess Street and West Main Street, 3.39 m (11.1 ft) east
of a light pole, 2.60 m (8.5 ft) west-northwest of the center of the entrance to
the building and 1.40 m (4.6 ft) above the ground.                              
 



                         BENCH MARK STAMPING:  12
                         DESIGNATION:          12

MONUMENTATION:           Survey disk                           VM#:        20452
AGENCY:                  USGS                                  IDB PID#:  EY0447
SETTING CLASSIFICATION:  Building wall                         OPUS PID:        
LATITUDE:   35° 32.6' N (  35.54319)          LONGITUDE:  77°  3.2' W ( -77.05414)


The bench mark is a disk 0.3 m (1 ft) above the sidewalk set vertically in the
southeast face of the stucco over brick building housing the public library,
37.8 m (124.0 ft) west-southwest of bench mark Z 25, 20.1 m (66.0 ft) south of
Second Street, 8.9 m (29.3 ft) west of Market Street, and 0.6 m (2.0 ft)
northeast of south corner of building.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of  8

                                                                                
Station ID: 8653365                         PUBLICATION DATE:  12/04/2012
Name:       WASHINGTON, TAR RIVER, PAMLICO RIVER              
            NC
NOAA Chart: 11554                           Latitude:   35° 32.7' N (  35.54500)
USGS Quad:  WASHINGTON, NC                  Longitude:  77°  3.7' W ( -77.06170)


                            T I D A L   D A T U M S 


Tidal datums at WASHINGTON, TAR RIVER, PAMLICO RIVER based on:

     LENGTH OF SERIES:      3 MONTHS
     TIME PERIOD:           May 2012 - July 2012
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8652587 OREGON INLET MARINA, PAMLICO SOUND


Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:

     MEAN HIGHER HIGH WATER                     MHHW   =  0.321
     North American Vertical Datum              NAVD88 =  0.285
     MEAN HIGH WATER                            MHW    =  0.281
     MEAN SEA LEVEL                             MSL    =  0.171
     MEAN TIDE LEVEL                            MTL    =  0.166
     MEAN LOW WATER                             MLW    =  0.050
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     Z 25 1932                                   3.322    3.041
     3365 A 2012                                 1.199    0.918
     3365 B 2012                                 1.202    0.921
     BRIDGE 1965                                 3.060    2.779
     HARRIS 1979                                 3.092    2.811
     WASHINGTON 1932                             4.110    3.829
     12                                          3.375    3.094


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  8 of  8

                                                                                
Station ID: 8653365                         PUBLICATION DATE:  12/04/2012
Name:       WASHINGTON, TAR RIVER, PAMLICO RIVER              
            NC
NOAA Chart: 11554                           Latitude:   35° 32.7' N (  35.54500)
USGS Quad:  WASHINGTON, NC                  Longitude:  77°  3.7' W ( -77.06170)


                             D E F I N I T I O N S


Mean Sea Level (MSL) is a tidal datum determined over a 19-year National Tidal
Datum Epoch.  It pertains to local mean sea level and should not be confused
with the fixed datums of North American Vertical Datum of 1988 (NAVD88).

NAVD88 is a fixed datum derived from a simultaneous, least squares, minimum
constraint adjustment of Canadian/Mexican/United States leveling observations.
Local mean sea level observed at Father Point/Rimouski, Canada was held fixed as
the single initial constraint.  NAVD88 replaces NGVD29 as the national
standard geodetic reference for heights.  Bench mark elevations relative to
NAVD88 are available from NGS through the World Wide Web at 
National Geodetic Survey.

NGVD29 is a fixed datum adopted as a national standard geodetic reference for
heights but is now considered superseded.  NGVD29 is sometimes referred to as
Sea Level Datum of 1929 or as Mean Sea Level on some early issues of Geological
Survey Topographic Quads.  NGVD29 was originally derived from a general
adjustment of the first-order leveling networks of the U.S. and Canada after
holding mean sea level observed at 26 long term tide stations as fixed.
Numerous local and wide-spread adjustments have been made since establishment in
1929.  Bench mark elevations relative to NGVD29 are available from the National
Geodetic Survey (NGS) data base via the World Wide Web at 
National Geodetic Survey.

NAVD88 and NGVD29 are fixed geodetic datums whose elevation relationships to
local MSL and other tidal datums may not be consistent from one location to
another.

The Vertical Mark Number (VM#) and PID# shown on the bench mark sheet are unique
identifiers for bench marks in the tidal and geodetic databases, respectively.
Each bench mark in either database has a single, unique VM# and/or PID# assigned.
Where both VM# and PID# are indicated, both tidal and geodetic elevations are
available for the bench mark listed. The NGS's Integrated Data Base (IDB PID)
provides geodetic datum based on traditionally leveled and bluebooked ties to
the National Spatial Reference System(NSRS) https://www.ngs.noaa.gov/datasheets/.
The NGS Online Positioning User Service (OPUS PID) provides geodetic datum based
on GPS position & tie it to the NSRS https://www.ngs.noaa.gov/OPUS/.

The NAVD88 elevation is shown on the Elevations of Tidal Datums Table Referred
to MLLW only when two or more of the bench marks listed have NAVD88 elevations.
The NAVD88 elevation relationship shown in the table is derived from an average
of several bench mark elevations relative to tide station datum.  As a result of
this averaging, NAVD88 bench mark elevations computed indirectly from the tidal
datums elevation table may differ slightly from NAVD88 elevations listed for
each bench mark in the NGS database.

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