U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  9

                                                                                
Station ID: 8741533                         PUBLICATION DATE:  10/21/2020
Name:       PASCAGOULA NOAA LAB, PASCAGOULA RIVER             
            MS
NOAA Chart: 11389                           Latitude:   30° 22.1' N (  30.36778)
USGS Quad:  PASCAGOULA, SOUTH               Longitude:  88° 33.8' W ( -88.56306)


FROM THE INTERSECTION OF US-90 AND PASCAGOULA ST IN PASCAGOULA, MS, FOLLOW
PASCAGOULA ST SOUTH 0.3 MILES (0.5 KM) TO DELMAS AVE.  TURN RIGHT AND CONTINUE
WEST TO THE NOAA FACILITY, 0.4 MILES.  THE GAUGE IS LOCATED ON THE NORTHERN
SECTION OF THE PIER AND THE BENCH MARKS ARE LOCATED ON THE PROPERTY AND ALONG
DELMAS AVE.


                         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  9

                                                                                
Station ID: 8741533                         PUBLICATION DATE:  10/21/2020
Name:       PASCAGOULA NOAA LAB, PASCAGOULA RIVER             
            MS
NOAA Chart: 11389                           Latitude:   30° 22.1' N (  30.36778)
USGS Quad:  PASCAGOULA, SOUTH               Longitude:  88° 33.8' W ( -88.56306)


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


                 PRIMARY BENCH MARK STAMPING:  1429 B 1980
                         DESIGNATION:          874 1429 B
                         ALIAS:                NOS 1429 B 1980

MONUMENTATION:           Bench Mark disk                       VM#:        18433
AGENCY:                  National Ocean Service (NOS)          IDB PID:         
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   30° 22.0' N (  30.36681)          LONGITUDE:  88° 33.8' W ( -88.56286)


The primary bench mark is a disk located 7.0 m (23.0 ft) ESE of the east rail of
the L and N railroad tracks, 7.0 m (23.0 ft) north of the centerline of Watts
Road, 2.9 m (9.5 ft) west of the west point of the intersection of a 2.0 m (6.6
ft) high chainlink fence, and 0.3 m (1.0 ft) ESE of a power pole.  The bench
mark is set 0.1 m (0.3 ft) below ground level, crimped to the top of a steel rod
driven 15.0 m (49.2 ft) to substantial resistance, and encased in a 4-inch PVC
pipe and concrete kickblock.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  9

                                                                                
Station ID: 8741533                         PUBLICATION DATE:  10/21/2020
Name:       PASCAGOULA NOAA LAB, PASCAGOULA RIVER             
            MS
NOAA Chart: 11389                           Latitude:   30° 22.1' N (  30.36778)
USGS Quad:  PASCAGOULA, SOUTH               Longitude:  88° 33.8' W ( -88.56306)


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


                         BENCH MARK STAMPING:  1533 B 2005
                         DESIGNATION:          874 1533 B
                         ALIAS:                NOS 1533 B 2005

MONUMENTATION:           Tidal Station disk                    VM#:        17962
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete sea wall                     OPUS PID#: BBBG91
LATITUDE:   30° 22.1' N (  30.36774)          LONGITUDE:  88° 33.8' W ( -88.56294)


The bench mark is a standard NOS disk located on the far eastern edge of a
concrete sea wall and is 23.6 m (77.4 ft) west-southwest of the centerline of a
boat ramp, 19.0 m (62.3 ft) northeast of a flagpole, and 3.1 m (10.2 ft) west of
telephone pole 167.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  9

                                                                                
Station ID: 8741533                         PUBLICATION DATE:  10/21/2020
Name:       PASCAGOULA NOAA LAB, PASCAGOULA RIVER             
            MS
NOAA Chart: 11389                           Latitude:   30° 22.1' N (  30.36778)
USGS Quad:  PASCAGOULA, SOUTH               Longitude:  88° 33.8' W ( -88.56306)


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


                         BENCH MARK STAMPING:  1533 A 2005
                         DESIGNATION:          874 1533 A
                         ALIAS:                NOS 1533 A 2005

MONUMENTATION:           Tidal Station disk                    VM#:        17963
AGENCY:                  National Ocean Service (NOS)          IDB PID:         
SETTING CLASSIFICATION:  Seawall                               OPUS PID#: BBCS56
LATITUDE:   30° 22.1' N (  30.36813)          LONGITUDE:  88° 33.8' W ( -88.56295)


The bench mark is a disk set in the northern most end of a NOAA pier, located
10.0 m (32.8 ft) NNW of the northern most lamp post, 3.7 m (12.1 ft) west of a
ladder on the NE corner of the NOAA pier and 3.5 m (11.5 ft) NE of the northern
most bollard.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  9

                                                                                
Station ID: 8741533                         PUBLICATION DATE:  10/21/2020
Name:       PASCAGOULA NOAA LAB, PASCAGOULA RIVER             
            MS
NOAA Chart: 11389                           Latitude:   30° 22.1' N (  30.36778)
USGS Quad:  PASCAGOULA, SOUTH               Longitude:  88° 33.8' W ( -88.56306)


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


                         BENCH MARK STAMPING:  1429 D 1980
                         DESIGNATION:          874 1429 D
                         ALIAS:                NOS 1429 D 1980

MONUMENTATION:           Bench Mark disk                       VM#:        18434
AGENCY:                  National Ocean Service (NOS)          IDB PID:         
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   30° 22.0' N (  30.36642)          LONGITUDE:  88° 33.7' W ( -88.56194)


The bench mark is a disk located 12.0 m (39.4 ft) SSW of the centerline of Watts
Avenue, 7.7 m (25.3 ft) west of a power pole, and 0.9 m (3.0 ft) NW of the NW
edge of a NOAA sign.  The bench mark is set 0.1 m (0.3 ft) below ground level,
crimped to the top of a steel rod driven 15.0 m (49.2 ft) to substantial
resistance, and encased in a 4-inch PVC pipe and concrete kickblock.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  9

                                                                                
Station ID: 8741533                         PUBLICATION DATE:  10/21/2020
Name:       PASCAGOULA NOAA LAB, PASCAGOULA RIVER             
            MS
NOAA Chart: 11389                           Latitude:   30° 22.1' N (  30.36778)
USGS Quad:  PASCAGOULA, SOUTH               Longitude:  88° 33.8' W ( -88.56306)


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


                         BENCH MARK STAMPING:  F 189 1955
                         DESIGNATION:          F 189

MONUMENTATION:           Bench Mark disk                       VM#:        18435
AGENCY:                  USGS                                  IDB PID#:  BH0327
SETTING CLASSIFICATION:  Surrounded by a mass of concrete      OPUS PID:        
LATITUDE:   30° 22.0' N (  30.36734)          LONGITUDE:  88° 33.6' W ( -88.55937)


The bench mark is a disk vertically set in the north face of a one story brick
building at 262 West Delmas Ave., located 27.7 m (90.9 ft) south of the SE
corner of the Louisville and Nashville Railroad Station, in the NW quarter of
the intersection of south Magnolia Street and west Delmas Ave., and 0.34 m (1.12
ft) east of the NW corner of the building.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of  9

                                                                                
Station ID: 8741533                         PUBLICATION DATE:  10/21/2020
Name:       PASCAGOULA NOAA LAB, PASCAGOULA RIVER             
            MS
NOAA Chart: 11389                           Latitude:   30° 22.1' N (  30.36778)
USGS Quad:  PASCAGOULA, SOUTH               Longitude:  88° 33.8' W ( -88.56306)


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


                         BENCH MARK STAMPING:  Z 192 RESET 2000
                         DESIGNATION:          Z 192 RESET

MONUMENTATION:           Vertical Control disk                 VM#:        18526
AGENCY:                  National Geodetic Survey (NGS)        IDB PID#:  DE7994
SETTING CLASSIFICATION:  Bridge abutment                       OPUS PID:        
LATITUDE:   30° 22.3' N (  30.37170)          LONGITUDE:  88° 33.7' W ( -88.56170)


The bench mark is a disk set in the north end of the east abutment of the new
high rise bridge over the east Pascagoula River, located near the intersection
of Pascagoula Street and Highway 90, 18.3 m (60.0 ft) SE of a brick structure
from the old lighthouse - Lighthouse Park, 16 m (52.5 ft) south of the
centerline of a sidewalk, 7.1 m (23.3 ft) west of the western pole supporting
the inverstate overpass sign, 0.8 m (2.6 ft) east of a light pole near the wing
wall of a bridge.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  8 of  9

                                                                                
Station ID: 8741533                         PUBLICATION DATE:  10/21/2020
Name:       PASCAGOULA NOAA LAB, PASCAGOULA RIVER             
            MS
NOAA Chart: 11389                           Latitude:   30° 22.1' N (  30.36778)
USGS Quad:  PASCAGOULA, SOUTH               Longitude:  88° 33.8' W ( -88.56306)


                            T I D A L   D A T U M S 


Tidal datums at PASCAGOULA NOAA LAB, PASCAGOULA RIVER based on:

     LENGTH OF SERIES:      10 YEARS
     TIME PERIOD:           03/07-02/12, 05/14-04/19
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8729840 PENSACOLA, PENSACOLA BAY


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

     HIGHEST OBSERVED WATER LEVEL (10/08/2017)         =  2.359
     MEAN HIGHER HIGH WATER                     MHHW   =  0.467
     MEAN HIGH WATER                            MHW    =  0.439
     MEAN TIDE LEVEL                            MTL    =  0.233
     MEAN SEA LEVEL                             MSL    =  0.231
     North American Vertical Datum              NAVD88 =  0.200
     MEAN LOW WATER                             MLW    =  0.026
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (01/14/2006)         = -0.657

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     1429 B 1980                                 2.432    1.993
     1533 B 2005                                 2.468    2.029
     1533 A 2005                                 2.422    1.983
     1429 D 1980                                 3.552    3.113
     F 189 1955                                  4.811    4.372
     Z 192 RESET 2000                            6.078    5.639


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  9 of  9

                                                                                
Station ID: 8741533                         PUBLICATION DATE:  10/21/2020
Name:       PASCAGOULA NOAA LAB, PASCAGOULA RIVER             
            MS
NOAA Chart: 11389                           Latitude:   30° 22.1' N (  30.36778)
USGS Quad:  PASCAGOULA, SOUTH               Longitude:  88° 33.8' W ( -88.56306)


                             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.