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Bench Mark Sheet for 8726632, ARCHIE CREEK 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8726632                         PUBLICATION DATE:  05/12/2004
Name:       ARCHIE CREEK                                      
            FL
NOAA Chart: 11413                           Latitude:   27° 52.9' N (  27.88170)
USGS Quad:  TAMPA                           Longitude:  82° 23.8' W ( -82.39670)


To reach the tidal bench marks from the south end of the U.S. Highway 41 bridge
over Palm River, proceed south on U.S. Highway 41 for 7.4 km (4.6 mi) to the
bridge over Archie Creek.  The bench marks are located along U.S. Highway 41. 
The tide gage and staff were located on the west side of the bridge.


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


                 PRIMARY BENCH MARK STAMPING:  6632 A 1977
                         DESIGNATION:          872 6632 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         6633
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG7469
SETTING CLASSIFICATION:  Concrete culvert                      OPUS PID:        
LATITUDE:   27° 53.0' N (  27.88330)          LONGITUDE:  82° 23.7' W ( -82.39500)


The primary bench mark is a disk set flush in a concrete culvert, 18.29 m (60.0
ft) NW of the SE end of the culvert head wall, 9 m (29 ft) SW of the centerline
of the southbound lane of U.S. Highway 41, 1 m (3 ft) SE of the NW end of the
culvert head wall, and 1 m (2 ft) below the highway.



                         BENCH MARK STAMPING:  6632 B 1977
                         DESIGNATION:          872 6632 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         6634
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG7468
SETTING CLASSIFICATION:  Concrete box drain                    OPUS PID#: AG7468
LATITUDE:   27° 53.0' N (  27.88330)          LONGITUDE:  82° 23.7' W ( -82.39500)


The bench mark is a disk set flush in a 2 X 2 m  (6 x 7 ft) concrete drain box
with an iron gate, 19.81 m (65.0 ft) ESE of bench mark 6632 A 1977, 11.19 m
(36.7 ft) SW of the centerline of the northbound lane of U.S. Highway 41, 8.99 m
(29.5 ft) NE of the centerline of the southbound lane of U.S. Highway 41, and 1
m (2 ft) below the highway.

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

                                                                                
Station ID: 8726632                         PUBLICATION DATE:  05/12/2004
Name:       ARCHIE CREEK                                      
            FL
NOAA Chart: 11413                           Latitude:   27° 52.9' N (  27.88170)
USGS Quad:  TAMPA                           Longitude:  82° 23.8' W ( -82.39670)


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


                         BENCH MARK STAMPING:  6632 C 1977
                         DESIGNATION:          872 6632 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         6635
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG7467
SETTING CLASSIFICATION:  Concrete culvert                      OPUS PID:        
LATITUDE:   27° 53.0' N (  27.88330)          LONGITUDE:  82° 23.7' W ( -82.39500)


The bench mark is a disk set flush in a concrete culvert, 21.18 m (69.5 ft) ESE
of bench mark 6632 B 1977, 8.08 m (26.5 ft) NE of the centerline of the
northbound lane of U.S. Highway 41, 0.24 m (0.8 ft) NW of the SE end of the
culvert head wall, and 1 m (2 ft) below the highway.



                         BENCH MARK STAMPING:  6632 E 1977
                         DESIGNATION:          872 6632 E TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         6636
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG7466
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   27° 52.9' N (  27.88170)          LONGITUDE:  82° 23.7' W ( -82.39500)


The bench mark is a disk set in the top of a concrete monument, 575 feet (175 m)
south of bench mark 6632 C 1977, 24 m (78 ft) NE of the centerline of the
northbound lane of U.S. Highway 41, 1.07 m (3.5 ft) SW of the SW end of a
billboard sign with a witness sign attached, and 1 m (4 ft) below the highway.

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

                                                                                
Station ID: 8726632                         PUBLICATION DATE:  05/12/2004
Name:       ARCHIE CREEK                                      
            FL
NOAA Chart: 11413                           Latitude:   27° 52.9' N (  27.88170)
USGS Quad:  TAMPA                           Longitude:  82° 23.8' W ( -82.39670)


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


                         BENCH MARK STAMPING:  6632 F 1977
                         DESIGNATION:          872 6632 F TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         6637
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG7465
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   27° 52.9' N (  27.88170)          LONGITUDE:  82° 23.7' W ( -82.39500)


The bench mark is a disk located 105 m (345 ft) SSW of bench mark 6632 E 1977,
10.21 m (33.5 ft) SW of the centerline of the northbound lane of U.S. Highway
41, 10.21 m (33.5 ft) NE of the centerline of the southbound lane of US highway
41, and 2 m (6 ft) north of the north curb of the median cross-over road.  The
bench mark is crimped to the top of a copper-clad steel rod driven an
unspecified depth to refusal, 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  5

                                                                                
Station ID: 8726632                         PUBLICATION DATE:  05/12/2004
Name:       ARCHIE CREEK                                      
            FL
NOAA Chart: 11413                           Latitude:   27° 52.9' N (  27.88170)
USGS Quad:  TAMPA                           Longitude:  82° 23.8' W ( -82.39670)


                            T I D A L   D A T U M S 


Tidal datums at ARCHIE CREEK based on:

     LENGTH OF SERIES:      2 MONTHS
     TIME PERIOD:           March 1977 - April 1977
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8726520 ST. PETERSBURG, TAMPA BAY


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.640
     MEAN HIGH WATER                            MHW    =  0.579
     North American Vertical Datum              NAVD88 =  0.340
     MEAN TIDE LEVEL                            MTL    =  0.320
     MEAN SEA LEVEL                             MSL    =  0.306
     MEAN LOW WATER                             MLW    =  0.060
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     6632 A 1977                                 2.030    1.451
     6632 B 1977                                 1.991    1.412
     6632 C 1977                                 1.997    1.418
     6632 E 1977                                 1.306    0.727
     6632 F 1977                                 3.157    2.578


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

                                                                                
Station ID: 8726632                         PUBLICATION DATE:  05/12/2004
Name:       ARCHIE CREEK                                      
            FL
NOAA Chart: 11413                           Latitude:   27° 52.9' N (  27.88170)
USGS Quad:  TAMPA                           Longitude:  82° 23.8' W ( -82.39670)


                             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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Revised: 08/08/2018
NOAA / National Ocean Service
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