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Bench Mark Sheet for 8729851, CHEMSTRAND PIER FL

Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8729851                         PUBLICATION DATE:  07/26/2004
Name:       CHEMSTRAND PIER                                   
            FL
NOAA Chart: 11382                           Latitude:   30° 35.9' N (  30.59830)
USGS Quad:  PACE                            Longitude:  87° 14.8' W ( -87.24670)


To reach the tidal bench marks from the intersection of U.S. Alt. Highway 90 and
U.S. Highway 29 north of Pensacola, proceed north on U.S. Highway 29 for 5.3 km
(3.3 mi) to County Road C-749 (Chemstrand Road), then turn right and proceed NE
on County Road C-749 for 3.9 km (2.4 mi) to the Monsanto Company Plant.  The
bench marks are inside the plant property and along the entrance road.  The tide
gage and staff were located on the NE corner of the Monsanto Company dock at the
Escambia River.


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


                 PRIMARY BENCH MARK STAMPING:  9851 C ELEV. 36.490 E5950.00
                                               N13400.00
                         DESIGNATION:          872 9851 C TIDAL

MONUMENTATION:           Not specified (see descriptive text)  VM#:        10278
AGENCY:                  Monsanto Corporation                  IDB PID#:  BG4582
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   30° 36.0' N (  30.60000)          LONGITUDE:  87° 15.0' W ( -87.25000)


The primary bench mark is a brass disk set in the top of a concrete monument in
a secured area of the plant, surrounded by a 1.1 m (3.5 ft) high, 2 m (6 ft)
diameter circular pipe barricade, 20.88 m (68.5 ft) east of the intersection of
Central Avenue and H Street, 13.26 m (43.5 ft) SE of power line pole #135, 10.82
m (35.5 ft) WSW of an overhead pipeline support, 8.90 m (29.2 ft) west of fire
control valve #S36, and 0.2 m (0.8 ft) above ground level.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  5

                                                                                
Station ID: 8729851                         PUBLICATION DATE:  07/26/2004
Name:       CHEMSTRAND PIER                                   
            FL
NOAA Chart: 11382                           Latitude:   30° 35.9' N (  30.59830)
USGS Quad:  PACE                            Longitude:  87° 14.8' W ( -87.24670)


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


                         BENCH MARK STAMPING:  9851 D ELEV. 38.414 E5530.0 N1
                         DESIGNATION:          872 9851 D TIDAL

MONUMENTATION:           Not specified (see descriptive text)  VM#:        10279
AGENCY:                  Monsanto Corporation                  IDB PID#:  BG4581
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   30° 35.9' N (  30.59830)          LONGITUDE:  87° 15.0' W ( -87.25000)


The bench mark is a brass disk set in the top of a concrete monument in a
secured area of the plant, surrounded by a 1 m (3.5 ft) high, 2 m (6 ft)
diameter circular pipe barricade painted with red and white stripes, 145.21 m
(476.4 ft) SE of bench mark 9851 E E.5530 N13400 ELEV.39.016, 22.56 m (74.0 ft)
east of the intersection of G Street South and a paved cross street, 16.98 m
(55.7 ft) SE of fire control valve #S28, and 10.36 m (34.0 ft) SE of fire
control valve #S93, and at ground level.



                         BENCH MARK STAMPING:  9851 E E.5530 N13400 ELEV. 39.016
                         DESIGNATION:          872 9851 E TIDAL

MONUMENTATION:           Not specified (see descriptive text)  VM#:        10280
AGENCY:                  Monsanto Corporation                  IDB PID#:  BG4580
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   30° 35.9' N (  30.59830)          LONGITUDE:  87° 15.0' W ( -87.25000)


The bench mark is a brass disk set in the top of a concrete monument in a
secured area of the plant, surrounded by a 2 m (6 ft) diameter white circular
pipe barricade, 0.6 km (0.4 mi) NE of the security gate, 20.33 m (66.7 ft) NE of
centerline of G Street South, 10.36 m (34.0 ft) SE of fire control valve #S32,
10.36 m (34.0 ft) SE of the east corner of red brick building and 0.15 m (0.5
ft) below ground level.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  5

                                                                                
Station ID: 8729851                         PUBLICATION DATE:  07/26/2004
Name:       CHEMSTRAND PIER                                   
            FL
NOAA Chart: 11382                           Latitude:   30° 35.9' N (  30.59830)
USGS Quad:  PACE                            Longitude:  87° 14.8' W ( -87.24670)


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


                         BENCH MARK STAMPING:  9851 F 1985
                         DESIGNATION:          872 9851 F TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        17268
AGENCY:                  National Ocean Service (NOS)          IDB PID#:  BG4579
SETTING CLASSIFICATION:  Concrete base                         OPUS PID:        
LATITUDE:   30° 35.7' N (  30.59500)          LONGITUDE:  87° 15.4' W ( -87.25670)


The bench mark is a disk set in the concrete base for the flagpole in the center
of a 30 m (100 ft) diameter traffic island, 0.6 km (0.4 mi) NE of the entrance
to the Monsanto property, and 0.30 m (1 ft) SE of the flagpole.



                         BENCH MARK STAMPING:  9851 G 1985
                         DESIGNATION:          872 9851 G TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        17269
AGENCY:                  National Ocean Service (NOS)          IDB PID#:  BG4578
SETTING CLASSIFICATION:  Culvert head wall                     OPUS PID#: BG4578
LATITUDE:   30° 35.4' N (  30.59000)          LONGITUDE:  87° 15.7' W ( -87.26170)


The bench mark is a disk set in the top of a concrete culvert head wall at the
entrance to the Monsanto property, 18.90 m (62.0 ft) SE of the centerline of the
east-west entrance road, 17.83 m (58.5 ft) NE of and across the north-south road
from a light pole, 5.18 m (17.0 ft) east of the centerline of the north-south
entrance road, 0.3 m (1 ft) north of the south end of the head wall, and 0.3 m
(1 ft) below road level.

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

                                                                                
Station ID: 8729851                         PUBLICATION DATE:  07/26/2004
Name:       CHEMSTRAND PIER                                   
            FL
NOAA Chart: 11382                           Latitude:   30° 35.9' N (  30.59830)
USGS Quad:  PACE                            Longitude:  87° 14.8' W ( -87.24670)


                            T I D A L   D A T U M S 


Tidal datums at CHEMSTRAND PIER based on:

     LENGTH OF SERIES:      2 MONTHS
     TIME PERIOD:           June 1977 - July 1977
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8729840 PENSACOLA, PENSACOLA BAY


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.445
     MEAN HIGH WATER                            MHW    =  0.422
     MEAN TIDE LEVEL                            MTL    =  0.223
     MEAN SEA LEVEL                             MSL    =  0.223
     North American Vertical Datum              NAVD88 =  0.082
     MEAN LOW WATER                             MLW    =  0.024
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     9851 C ELEV. 36.490 E5950.00
     N13400.00                                  11.146   10.724
     9851 D ELEV. 38.414 E5530.0 N1             11.727   11.305
     9851 E E.5530 N13400 ELEV. 39.016          11.912   11.490
     9851 F 1985                                16.719   16.297
     9851 G 1985                                26.591   26.169


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

                                                                                
Station ID: 8729851                         PUBLICATION DATE:  07/26/2004
Name:       CHEMSTRAND PIER                                   
            FL
NOAA Chart: 11382                           Latitude:   30° 35.9' N (  30.59830)
USGS Quad:  PACE                            Longitude:  87° 14.8' W ( -87.24670)


                             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 8729851 CHEMSTRAND PIER, FL

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