NOAA Web Site Link Tides and Currents Home Page Transparent placeholder image

Bench Mark Sheet for 8744671, POPPS FERRY, BACK BAY OF BILOXI 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  5

                                                                                
Station ID: 8744671                         PUBLICATION DATE:  10/29/2014
Name:       POPPS FERRY, BACK BAY OF BILOXI                   
            MS
NOAA Chart: 11373                           Latitude:   30° 24.8' N (  30.41330)
USGS Quad:  BILOXI                          Longitude:  88° 58.5' W ( -88.97500)


To reach the tidal bench marks from the intersection of U.S. Highway 90 and
Beauvoir Road in Biloxi, proceed 0.8 m (1.3 km) north on Beauvoir Road to the
intersection of Beauvoir Avenue and Pass Road; then 0.2 m (0.3 km) west on Pass
Road to the intersection of Pass Road and Popps Ferry Road; then 0.8 m (1.3 km)
north on Popps Ferry Road to the Popps Ferry Fish Camp at the south end of the
bridge over Back Bay.  The bench marks are located in the vicinity of the fish
camp and north along Popps Ferry Road.  The tide gage and staff were located on
the south side of the Fish Camp pier just east of the gasoline pump.


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


                 PRIMARY BENCH MARK STAMPING:  4671C 1979
                         DESIGNATION:          874 4671 C

MONUMENTATION:           Tidal Station disk                    VM#:        11544
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   30° 24.8' N (  30.41330)          LONGITUDE:  88° 58.5' W ( -88.97500)


The bench mark is a disk crimped to a steel rod, located on the east side of
Popps Ferry Road, 72 m (236 ft) south of bench mark 4671A 1979, 14.39 m (47.2
ft) east of the centerline of Popps Ferry Road, and 4 m (12 ft) SW of power pole
#MI-CO,678,SPC,440.  The bench mark is 0.09 m (0.3 ft) below ground level,
crimped to a steel rod driven 14 m (45 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  2 of  5

                                                                                
Station ID: 8744671                         PUBLICATION DATE:  10/29/2014
Name:       POPPS FERRY, BACK BAY OF BILOXI                   
            MS
NOAA Chart: 11373                           Latitude:   30° 24.8' N (  30.41330)
USGS Quad:  BILOXI                          Longitude:  88° 58.5' W ( -88.97500)


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


                         BENCH MARK STAMPING:  4671A 1979
                         DESIGNATION:          874 4671 A

MONUMENTATION:           Tidal Station disk                    VM#:        11543
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Bridge abutment                       OPUS PID:        
LATITUDE:   30° 24.8' N (  30.41330)          LONGITUDE:  88° 58.5' W ( -88.97500)


The primary bench mark is a disk set on the SE corner abutment of the Popps
Ferry Road bridge over Back Bay, 34 m (110 ft) west of the shoreline of a bayou,
31.49 m (103.3 ft) south of the SW corner of the Popps Ferry Fish Camp building,
and 9.24 m (30.3 ft) east of the centerline of the bridge.



                         BENCH MARK STAMPING:  4671D 1979
                         DESIGNATION:          874 4671 D

MONUMENTATION:           Tidal Station disk                    VM#:        11545
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   30° 24.8' N (  30.41330)          LONGITUDE:  88° 58.5' W ( -88.97500)


The bench mark is a disk crimped to a steel rod, located on the west side of
Popps Ferry Road, 75 m (246 ft) SW of bench mark 4671C 1979, 36 m (118 ft) south
of a fence corner, 7 m (24 ft) west of the centerline of Popps Ferry road, 1.43
m (4.7 ft) SW of power pole #8, and 0.61 m (2.0 ft) west of a fence line.  The
bench mark is 0.09 m (0.3 ft) below ground level, crimped to a steel rod driven
12 m (40 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  3 of  5

                                                                                
Station ID: 8744671                         PUBLICATION DATE:  10/29/2014
Name:       POPPS FERRY, BACK BAY OF BILOXI                   
            MS
NOAA Chart: 11373                           Latitude:   30° 24.8' N (  30.41330)
USGS Quad:  BILOXI                          Longitude:  88° 58.5' W ( -88.97500)


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


                         BENCH MARK STAMPING:  4671G 1982
                         DESIGNATION:          874 4671 G

MONUMENTATION:           Tidal Station disk                    VM#:        11547
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   30° 24.8' N (  30.41330)          LONGITUDE:  88° 58.5' W ( -88.97500)


The bench mark is a disk crimped to a stainless steel rod, located 88 m (289 ft)
south of bench mark 4671D 1979, 84 m (277 ft) NNW of the first fire hydrant
north of the intersection of Popps Ferry Road and Old Bay Road, 40 m (131 ft)
north of power pole #5, 7 m (24 ft) west of the centerline of Popps Ferry Road,
and 2 m (6 ft) west of power pole #6 which bears a witness sign on its west
face.  The bench mark is 0.09 m (0.3 ft) below ground level, crimped to a
stainless steel rod driven 16 m (52 ft) to substantial resistance, and encased
in a 4-inch PVC pipe and concrete kickblock.



                         BENCH MARK STAMPING:  4671 F 1982
                         DESIGNATION:          874 4671 F

MONUMENTATION:           Tidal Station disk                    VM#:        17873
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   30° 24.8' N (  30.41330)          LONGITUDE:  88° 58.5' W ( -88.97500)


The bench mark is a stainless steel rod, located 6.4 m (21.0 ft) east of the
centerline of the sidewalk leading to the dock at Popps Ferry Fish Camp, 5.8 m
(19.0 ft) NE of the NE corner of Popps Ferry Restaurant, 4.3 m (14.0 ft)  west
of the intersection of the NE bulkhead and the east bulkhead surrounding the
fish camp, 2.4 m (8.0 ft) north of the easternly light pole in a set of 4 light
poles at the north side of the restaurant, and driven 15.24 m (50.0 ft) to
refusal.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  5

                                                                                
Station ID: 8744671                         PUBLICATION DATE:  10/29/2014
Name:       POPPS FERRY, BACK BAY OF BILOXI                   
            MS
NOAA Chart: 11373                           Latitude:   30° 24.8' N (  30.41330)
USGS Quad:  BILOXI                          Longitude:  88° 58.5' W ( -88.97500)


                            T I D A L   D A T U M S 


Tidal datums at POPPS FERRY, BACK BAY OF BILOXI based on:

     LENGTH OF SERIES:      3 YEARS
     TIME PERIOD:           January 1980 - December 1982
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8743735 BILOXI (CADET POINT), BILOXI BAY


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

     HIGHEST OBSERVED WATER LEVEL (01/20/1983)         =  1.572
     MEAN HIGHER HIGH WATER                     MHHW   =  0.597
     MEAN HIGH WATER                            MHW    =  0.554
     MEAN SEA LEVEL                             MSL    =  0.309
     MEAN TIDE LEVEL                            MTL    =  0.299
     MEAN LOW WATER                             MLW    =  0.044
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (09/13/1979)         = -1.076

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     4671C 1979                                  4.470    3.916
     4671A 1979                                  4.314    3.760
     4671D 1979                                  6.491    5.937
     4671G 1982                                  6.912    6.358
     4671 F 1982                                 0.874    0.320


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

                                                                                
Station ID: 8744671                         PUBLICATION DATE:  10/29/2014
Name:       POPPS FERRY, BACK BAY OF BILOXI                   
            MS
NOAA Chart: 11373                           Latitude:   30° 24.8' N (  30.41330)
USGS Quad:  BILOXI                          Longitude:  88° 58.5' W ( -88.97500)


                             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.

Return to Top
Products available at 8744671 POPPS FERRY, BACK BAY OF BILOXI, MS

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