U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  6

                                                                                
Station ID: 8639348                         PUBLICATION DATE:  06/22/2020
Name:       MONEY POINT, S. BR. ELIZABETH RIVER               
            VA
NOAA Chart: 12253                           Latitude:   36° 46.7' N (  36.77831)
USGS Quad:  NORFOLK SOUTH                   Longitude:  76° 18.1' W ( -76.30169)


To reach the tidal bench marks from the Post Office in Chesapeake, Virginia,
proceed north on Battlefield Boulevard for 0.8 km (0.5 mi), then continue west
on Interstate 64 toward Suffolk to Exit 291A for I-664 toward Norfolk, then take
I-664 to Freeman Avenue (Exit 3), turn left at the light and continue south on
Freeman Avenue for 1.1 km (0.7 mi) to Buell Street, then left on Buell Street
for 0.5 km (0.3 mi) to the Elizabeth River Terminal on the right.  The bench
marks are on the terminal property and the tide gage is located on the end of
pier No. 2.


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


                 PRIMARY BENCH MARK STAMPING:  9348 E 1997
                         DESIGNATION:          863 9348 E

MONUMENTATION:           Flange-encased Rod                    VM#:        13895
AGENCY:                  National Ocean Service (NOS)          IDB PID:         
SETTING CLASSIFICATION:  Stainless steel rod in sleeve         OPUS PID:        
LATITUDE:   36° 46.8' N (  36.78033)          LONGITUDE:  76° 18.0' W ( -76.29989)


The primary bench mark is a stainless steel rod located near an oil storage tank
in a grassy area, 60.50 m (198.5 ft) NNE of Warehouse No. 1, 24.29 m (79.7 ft)
ESE of the SE corner of the office/break room, 16.09 m (52.8 ft) south of the SE
corner of the electrical shop, 2.01 m (6.6 ft) NE of a witness post, and 1.80 m
(5.9 ft) south of a telephone pole. The datum point is the top of a stainless
steel rod driven 7.60 m (25.0 ft) to refusal, in a grease-filled sleeve
extending to a depth of 0.91 m (3.0 ft), and encased inside a 5-inch logo cap.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  6

                                                                                
Station ID: 8639348                         PUBLICATION DATE:  06/22/2020
Name:       MONEY POINT, S. BR. ELIZABETH RIVER               
            VA
NOAA Chart: 12253                           Latitude:   36° 46.7' N (  36.77831)
USGS Quad:  NORFOLK SOUTH                   Longitude:  76° 18.1' W ( -76.30169)


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


                         BENCH MARK STAMPING:  9348 D 1997
                         DESIGNATION:          863 9348 D TIDAL

MONUMENTATION:           Flange-encased Rod                    VM#:        13899
AGENCY:                  National Ocean Service (NOS)          IDB PID#:  AJ4592
SETTING CLASSIFICATION:  Stainless steel rod in sleeve         OPUS PID#: AJ4592
LATITUDE:   36° 46.9' N (  36.78186)          LONGITUDE:  76° 17.9' W ( -76.29811)


The bench mark is a stainless steel rod located near the Buell Street entrance
to the Elizabeth River Terminal, 30.60 m (100.4 ft) NE of the NE corner of the
main office building, 28.80 m (94.5 ft) south of Pratt Street, 12.71 m (41.7 ft)
WNW of Buell Street, and 1.19 m (3.9 ft) SE of a witness post.  The datum point
is set 0.09 m (0.3 ft) below ground, being the top of a stainless steel rod
driven 7.60 m (25.0 ft) to refusal, in a grease-filled sleeve extending to a
depth of 0.91 meter (3.0 ft), and encased in a 5-inch logo cap.



                         BENCH MARK STAMPING:  9348 F 2008
                         DESIGNATION:          863 9348 F

MONUMENTATION:           Bench Mark disk                       VM#:        18656
AGENCY:                  National Ocean Survey/Service(NOS)    IDB PID:         
SETTING CLASSIFICATION:  Foundation of stairs                  OPUS PID:        
LATITUDE:   36° 46.7' N (  36.77822)          LONGITUDE:  76° 18.1' W ( -76.30128)


The bench mark is a disk set flush in a concrete foundation for the stairs
leading to a platform of the conveyor belt south of a warehouse number 2, 29.33
m (96.2 ft) south of warehouse number 2, 2.90 m (9.5 ft) east of the west side
of a 6.58 m (21.59 ft) X 3.62 m (11.88 ft) concrete foundation for stairs, 0.55
m (1.8 ft) south of the staris leading to a platform on the conveyor belt.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  6

                                                                                
Station ID: 8639348                         PUBLICATION DATE:  06/22/2020
Name:       MONEY POINT, S. BR. ELIZABETH RIVER               
            VA
NOAA Chart: 12253                           Latitude:   36° 46.7' N (  36.77831)
USGS Quad:  NORFOLK SOUTH                   Longitude:  76° 18.1' W ( -76.30169)


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


                         BENCH MARK STAMPING:  9348 G 2011
                         DESIGNATION:          863 9348 G

MONUMENTATION:           Survey disk                           VM#:        20068
AGENCY:                  National Ocean Service                IDB PID:         
SETTING CLASSIFICATION:  Concrete foundation                   OPUS PID:        
LATITUDE:   36° 46.8' N (  36.78053)          LONGITUDE:  76° 18.0' W ( -76.30050)


The bench mark is a disk located near the Buell Street on the property of the
Elizabeth River Terminal, set flush with the ground in the SE corner of concrete
foundation of the main truck scale, 21.10 m (69.2 ft) NNE of the NE corner of
ERT shop, 3.00 m (9.8 ft) SE from the SW corner of the main truck scale, 0.20 m
(0.7 ft) NW of the SE corner of a 3 m x 3.5 m concrete slab.



                         BENCH MARK STAMPING:  9348 H 2011
                         DESIGNATION:          863 9348 H

MONUMENTATION:           Survey disk                           VM#:        20069
AGENCY:                  National Ocean Service                IDB PID:         
SETTING CLASSIFICATION:  Concrete foundation                   OPUS PID:        
LATITUDE:   36° 46.9' N (  36.78114)          LONGITUDE:  76° 18.0' W ( -76.29956)


The bench mark is a disk located near the Buell Street on the property of the
Elizabeth River Terminal, set flush in the top of a concrete ledge of the
foundation of a large oil tank, the bench mark is located 20.70 m (67.9 ft) NNE
from NE corner of building ERT 9, 4.80 m (15.7 ft) east from wooden pile with
two electrical boxes attached to it, 0.15 m (0.5 ft) west from wall of oil tank,
0.35 m (1.1 ft) above ground.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  6

                                                                                
Station ID: 8639348                         PUBLICATION DATE:  06/22/2020
Name:       MONEY POINT, S. BR. ELIZABETH RIVER               
            VA
NOAA Chart: 12253                           Latitude:   36° 46.7' N (  36.77831)
USGS Quad:  NORFOLK SOUTH                   Longitude:  76° 18.1' W ( -76.30169)


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


                         BENCH MARK STAMPING:  9348 J 2016
                         DESIGNATION:          863 9348 J

MONUMENTATION:           Bench Mark disk                       VM#:        21973
AGENCY:                  NOS                                   IDB PID:         
SETTING CLASSIFICATION:  Building foundation                   OPUS PID:        
LATITUDE:   36° 46.8' N (  36.77950)          LONGITUDE:  76° 18.1' W ( -76.30150)


The bench mark is a brass disk set vertically in the foundation for building ERT
2 located 105.0 m (346.0 ft) north from the southwest corner of building ERT 2,
17.70 m (58.0 ft) east from northeast corner of building ERT 7, 4.00 m (13.1 ft)
south of the northwest corner of building ERT 2, and 1.40 m (4.6 ft) above
ground.



                         BENCH MARK STAMPING:  9348 K 2016
                         DESIGNATION:          863 9348 K

MONUMENTATION:           Bench Mark disk                       VM#:        21974
AGENCY:                  NOS                                   IDB PID:         
SETTING CLASSIFICATION:  Concrete foundation                   OPUS PID:        
LATITUDE:   36° 46.8' N (  36.78019)          LONGITUDE:  76° 18.1' W ( -76.30139)


The bench mark is a brass disk set in the concrete foundation for the fall
protection system structure located 36.80 m (120.7 ft) south of the northeast
corner of the ERT 6 building, 20.00 m (65.6 ft) north of the southwest corner of
the ERT 12 building, and 2.40 m (7.9 ft) east of the west rail for the material
transport railroad track.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  6

                                                                                
Station ID: 8639348                         PUBLICATION DATE:  06/22/2020
Name:       MONEY POINT, S. BR. ELIZABETH RIVER               
            VA
NOAA Chart: 12253                           Latitude:   36° 46.7' N (  36.77831)
USGS Quad:  NORFOLK SOUTH                   Longitude:  76° 18.1' W ( -76.30169)


                            T I D A L   D A T U M S 


Tidal datums at MONEY POINT, S. BR. ELIZABETH RIVER based on:

     LENGTH OF SERIES:      21 YEARS
     TIME PERIOD:           01/1998-12/2016, 05/2017-04/2019
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8638610 SEWELLS POINT, HAMPTON ROADS


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

     HIGHEST OBSERVED WATER LEVEL (11/13/2009)         =  2.616
     MEAN HIGHER HIGH WATER                     MHHW   =  0.976
     MEAN HIGH WATER                            MHW    =  0.912
     MEAN SEA LEVEL                             MSL    =  0.478
     MEAN TIDE LEVEL                            MTL    =  0.477
     MEAN LOW WATER                             MLW    =  0.042
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (01/02/1998)         = -0.807

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     9348 E 1997                                 3.416    2.504
     9348 D 1997                                 2.042    1.130
     9348 F 2008                                 3.272    2.360
     9348 G 2011                                 2.734    1.822
     9348 H 2011                                 3.672    2.760
     9348 J 2016                                 4.180    3.268
     9348 K 2016                                 3.055    2.143


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

                                                                                
Station ID: 8639348                         PUBLICATION DATE:  06/22/2020
Name:       MONEY POINT, S. BR. ELIZABETH RIVER               
            VA
NOAA Chart: 12253                           Latitude:   36° 46.7' N (  36.77831)
USGS Quad:  NORFOLK SOUTH                   Longitude:  76° 18.1' W ( -76.30169)


                             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.