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Bench Mark Sheet for 8743735, Biloxi (Cadet Point) MS

Superseded Epoch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Small blue map location marker Unpublished bench mark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  6

                                                                                
Station ID: 8743735                         PUBLICATION DATE:  07/12/2004
Name:       BILOXI (CADET POINT), BILOXI BAY                  
            MS
NOAA Chart: 11373                           Latitude:   30° 23.4' N (  30.39000)
USGS Quad:  OCEAN SPRINGS                   Longitude:  88° 51.4' W ( -88.85670)


To reach the tidal bench marks from the intersection of U.S. Highway 90 and
Myrtle Street in Biloxi, proceed south on Myrtle Street, then immediately east
onto an access road which leads to Marine Education Center, go south at the
Marine Education Center entrance to a parking area and then to the Gulf Coast
Research Lab (GCRL) pier at Cadet Point. The bench marks are located in the
vicinity of the Marine Education Center. The tide gage and staff were located on
the east side of the GCRL concrete pier.


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


                 PRIMARY BENCH MARK STAMPING:  NO 1 1966
                         DESIGNATION:          874 3735 TIDAL 1

MONUMENTATION:           Tidal Station disk                    VM#:        11135
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  BH0390
SETTING CLASSIFICATION:  Concrete bridge abutment              OPUS PID:        
LATITUDE:   30° 23.4' N (  30.39000)          LONGITUDE:  88° 51.4' W ( -88.85670)


The primary bench mark is a disk set on top of the east corner of the SE end of
the SW concrete bridge abutment of the U.S. Highway 90 bridge over Biloxi Bay,
5.18 m (17.0 ft) NE of the SW end of the wing wall, and 1.22 m (4.0 ft) below
the level of the bridge sidewalk.

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

                                                                                
Station ID: 8743735                         PUBLICATION DATE:  07/12/2004
Name:       BILOXI (CADET POINT), BILOXI BAY                  
            MS
NOAA Chart: 11373                           Latitude:   30° 23.4' N (  30.39000)
USGS Quad:  OCEAN SPRINGS                   Longitude:  88° 51.4' W ( -88.85670)


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


                         BENCH MARK STAMPING:  NO 3 1966
                         DESIGNATION:          874 3735 TIDAL 3

MONUMENTATION:           Tidal Station disk                    VM#:        11136
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  BH0392
SETTING CLASSIFICATION:  Concrete sea wall                     OPUS PID:        
LATITUDE:   30° 23.4' N (  30.39000)          LONGITUDE:  88° 51.4' W ( -88.85670)


The bench mark is a disk set in the top of a concrete seawall south of Marine
Education Center, 48.16 m (158.0 ft) SSW of an angle in the seawall along Biloxi
Bay, 45.11 m (148.0 ft) NE of the center of a gate for the concrete pier, 22.28
m (73.1 ft) NE of the east end of a concrete breakwater east of the GCRL pier,
and 0.15 m (0.5 ft) below ground level.



                         BENCH MARK STAMPING:  NO 4 1969
                         DESIGNATION:          874 3735 TIDAL 4

MONUMENTATION:           Tidal Station disk                    VM#:        11137
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:        
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   30° 23.4' N (  30.39000)          LONGITUDE:  88° 51.4' W ( -88.85670)


The bench mark is a disk set in a concrete monument near the foot of the GCRL
pier,  40 m (131 ft) west of bench mark NO 3 1966, 6.71 m (22.0 ft) east of the
centerline of the pier, 1.22 m (4.0 ft) north of the sea wall, and at ground
level.

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

                                                                                
Station ID: 8743735                         PUBLICATION DATE:  07/12/2004
Name:       BILOXI (CADET POINT), BILOXI BAY                  
            MS
NOAA Chart: 11373                           Latitude:   30° 23.4' N (  30.39000)
USGS Quad:  OCEAN SPRINGS                   Longitude:  88° 51.4' W ( -88.85670)


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


                         BENCH MARK STAMPING:  NO 2 RESET 1976
                         DESIGNATION:          874 3735 TIDAL 2 RESET

MONUMENTATION:           Tidal Station disk                    VM#:        11138
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  BH0866
SETTING CLASSIFICATION:  Sea wall                              OPUS PID:        
LATITUDE:   30° 23.4' N (  30.39000)          LONGITUDE:  88° 51.4' W ( -88.85670)


The bench mark is a disk set flush in the top of the seawall, south of Marine
Education Center, 171 m (560 ft) south of bench mark NO 1 1966, 125 m (410 ft)
NE along the seawall from bench mark NO 3 1966, 61 m (200 ft) east of a
north-south 1.83 m (6.0 ft) high chain link fence, and 11.67 m (38.3 ft) SE of
the flag pole on the SE lawn of Gulf Marine State Park.



                         BENCH MARK STAMPING:  3735 B 1979
                         DESIGNATION:          874 3735 B

MONUMENTATION:           Tidal Station disk                    VM#:        11139
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   30° 23.4' N (  30.39000)          LONGITUDE:  88° 51.4' W ( -88.85670)


The bench mark is a disk located nearly midway between Marine Education Center
and the GCRL pier, 72 m (235 ft) north of the pier, 41.45 m (136.0 ft) NNE of a
power pole with three transformers, 38.71 m (127.0 ft) east of the SE corner of
an abandoned concrete foundation, 24.69 m (81.0 ft) SSW of the SW corner of the
picnic pavilion on the Gulf Marine State Park, and 11.34 m (37.2 ft) east of the
centerline of a two-track shell roadway. The bench mark is set 6 cm (0.2 ft)
below ground level, crimped to the top of a stainless steel rod driven 16.8 m
(55 ft) to refusal, 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  4 of  6

                                                                                
Station ID: 8743735                         PUBLICATION DATE:  07/12/2004
Name:       BILOXI (CADET POINT), BILOXI BAY                  
            MS
NOAA Chart: 11373                           Latitude:   30° 23.4' N (  30.39000)
USGS Quad:  OCEAN SPRINGS                   Longitude:  88° 51.4' W ( -88.85670)


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


                         BENCH MARK STAMPING:  3735 C 1979
                         DESIGNATION:          874 3735 C

MONUMENTATION:           Tidal Station disk                    VM#:        11140
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   30° 23.4' N (  30.39000)          LONGITUDE:  88° 51.4' W ( -88.85670)


The bench mark is a disk located SW of the Marine Education Center, 148 m (485
ft) north of the GCRL pier, 61 m (201 ft) west of bench mark NO 2 RESET 1976,
4.11 m (13.5 ft) SE of the eleventh concrete abutment on the walkway separating
Marine Education Center and Gulf Marine State Park, and 1.83 m (6.0 ft) WSW of
an asphalt roadway landing under the wooden walkway. The bench mark is set 9 cm
(0.3 ft) below ground level and crimped to the top of a stainless steel rod
driven 15.2 m (50 ft) to refusal.

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

                                                                                
Station ID: 8743735                         PUBLICATION DATE:  07/12/2004
Name:       BILOXI (CADET POINT), BILOXI BAY                  
            MS
NOAA Chart: 11373                           Latitude:   30° 23.4' N (  30.39000)
USGS Quad:  OCEAN SPRINGS                   Longitude:  88° 51.4' W ( -88.85670)


                            T I D A L   D A T U M S 


Tidal datums at BILOXI (CADET POINT), BILOXI BAY based on:

     LENGTH OF SERIES:      7 YEARS
     TIME PERIOD:           January 1980 - December 1986
     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 (05/31/1988)         =  2.498
     MEAN HIGHER HIGH WATER                     MHHW   =  0.537
     MEAN HIGH WATER                            MHW    =  0.505
     MEAN SEA LEVEL                             MSL    =  0.270
     MEAN TIDE LEVEL                            MTL    =  0.269
     North American Vertical Datum              NAVD88 =  0.115
     MEAN LOW WATER                             MLW    =  0.033
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (12/24/1983)         = -1.132

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     NO 1 1966                                   3.823    3.318
     NO 3 1966                                   1.194    0.689
     NO 4 1969                                   1.383    0.878
     NO 2 RESET 1976                             1.185    0.680
     3735 B 1979                                 1.797    1.292
     3735 C 1979                                 1.702    1.197


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

                                                                                
Station ID: 8743735                         PUBLICATION DATE:  07/12/2004
Name:       BILOXI (CADET POINT), BILOXI BAY                  
            MS
NOAA Chart: 11373                           Latitude:   30° 23.4' N (  30.39000)
USGS Quad:  OCEAN SPRINGS                   Longitude:  88° 51.4' W ( -88.85670)


                             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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Products available at 8743735 Biloxi (Cadet Point), MS

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services