Bench Mark Sheet for 8722951, PORT EVERGLADES, LAKE MABEL 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  6

                                                                                
Station ID: 8722951                         PUBLICATION DATE:  09/02/2011
Name:       PORT EVERGLADES, LAKE MABEL                       
            FL
NOAA Chart: 11470                           Latitude:   26°  5.5' N (  26.09170)
USGS Quad:  PORT EVERGLADES                 Longitude:  80°  7.4' W ( -80.12330)


To reach the tidal bench marks from the intersection of U.S. Highway 1 (SE 6th
Avenue) and Spangler Boulevard in Port Everglades, proceed east on Spangler
Boulevard for 1.29 km (0.8 mi) to Eisenhower Boulevard and the port facilities. 
The bench marks are located in the vicinity of the Customs House and slip No. 8.
 The tide gage and staff were located at the west end of slip No. 8.


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


                 PRIMARY BENCH MARK STAMPING:  NO 4 1934
                         DESIGNATION:          872 2951 TIDAL 4

MONUMENTATION:           Tidal Station disk                    VM#:         5699
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AD2443
SETTING CLASSIFICATION:  Concrete retaining wall               OPUS PID:        
LATITUDE:   26°  5.6' N (  26.09333)          LONGITUDE:  80°  7.4' W ( -80.12333)


The primary bench mark is a disk set vertically and flush in the face of a
retaining wall supporting railroad loading dock, about 0.52 m (1.7 ft) above the
level of the ground, about 0.36 m (1.2 ft) above the level of the railroad and
about the same level as Eisenhower Boulevard, 58.40 m (191.6 ft) east of the
centerline of the northbound lanes of Eisenhower Boulevard, 36.85 m (120.9 ft)
north of the north edge of a ship docking slip, 25.09 m (82.3 ft) SE of the SE
corner of a wood frame security building, 3.02 m (9.9 ft) east of a 45 degree
bend in retaining wall, and 2.99 m (9.8 ft) NE of the NE corner of a concrete
block restroom building.

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

                                                                                
Station ID: 8722951                         PUBLICATION DATE:  09/02/2011
Name:       PORT EVERGLADES, LAKE MABEL                       
            FL
NOAA Chart: 11470                           Latitude:   26°  5.5' N (  26.09170)
USGS Quad:  PORT EVERGLADES                 Longitude:  80°  7.4' W ( -80.12330)


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


                         BENCH MARK STAMPING:  TIDAL 2 RESET 1936
                         DESIGNATION:          872 2951 TIDAL 2 1936

MONUMENTATION:           Tidal Station disk                    VM#:         5700
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AD2444
SETTING CLASSIFICATION:  Concrete sea wall                     OPUS PID:        
LATITUDE:   26°  5.5' N (  26.09167)          LONGITUDE:  80°  7.4' W ( -80.12333)


The bench mark is a disk set in the concrete sea wall at the SW corner of slip
No. 1, 73.76 m (242.0 ft) SW of bench mark TIDAL 3 RESET 1936, about 22.25 m
(73.0 ft) south of the extended centerline of SW 24th Street, 1.34 m (4.4 ft) SW
of the SW corner of the raised part of the sea wall, and about level with the
ground.



                         BENCH MARK STAMPING:  TIDAL 3 RESET 1936
                         DESIGNATION:          872 2951 TIDAL 3

MONUMENTATION:           Tidal Station disk                    VM#:         5701
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AD2445
SETTING CLASSIFICATION:  Concrete Retaining Wall               OPUS PID:        
LATITUDE:   26°  5.6' N (  26.09333)          LONGITUDE:  80°  7.4' W ( -80.12333)


The bench mark is a disk set in the top of a retaining wall on the north side of
boat slip #8, 24.99 m (82.0 ft) south of a gate, 84.43 m (277.0 ft) east of the
centerline of Eisenhower Blvd, 2.90 m (9.5 ft) NE of the NW corner of a
bathhouse, 25.91 m (85.0 ft) SE of the SW corner of a guard shack at gate 6-B. 
NOTE:  The street address is 2370 Eisenhower Blvd.



                         BENCH MARK STAMPING:  F 239 1965
                         DESIGNATION:           F 239

MONUMENTATION:           Tidal Station disk                    VM#:         5702
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AD2480
SETTING CLASSIFICATION:  Concrete foundation                   OPUS PID:        
LATITUDE:   26°  5.5' N (  26.09167)          LONGITUDE:  80°  7.5' W ( -80.12500)


The bench mark is a disk set flush in the top of a concrete stoop at the front
entrance of the U.S. Customs building, about 0.79 m (2.6 ft) above the level of
State Road 84, 87.54 m (287.2 ft) west of the centerline of the southbound lanes
of Eisenhower Boulevard, 15.39 m (50.5 ft) south of the face of curb on the
south side of SR 84, 10.76 m (35.3 ft) west of the NE corner of the U.S. Customs
Building, 0.27 m (0.9 ft) west of the east edge of a concrete stoop, and 0.24 m
(0.8 ft) south of the north edge of a concrete stoop.  

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

                                                                                
Station ID: 8722951                         PUBLICATION DATE:  09/02/2011
Name:       PORT EVERGLADES, LAKE MABEL                       
            FL
NOAA Chart: 11470                           Latitude:   26°  5.5' N (  26.09170)
USGS Quad:  PORT EVERGLADES                 Longitude:  80°  7.4' W ( -80.12330)


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


                         BENCH MARK STAMPING:  J 311 1970
                         DESIGNATION:          J 311

MONUMENTATION:           Tidal Station disk                    VM#:        15831
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AD2446
SETTING CLASSIFICATION:  Flagpole Base                         OPUS PID:        
LATITUDE:   26°  5.6' N (  26.09333)          LONGITUDE:  80°  7.5' W ( -80.12500)


The bench mark is a disk set flush in a concrete slab surrounding a flagpole
about 0.91 m (3.0 ft) above the level of SR 84, at the junction of SR 84 and
Eisenhower Boulevard, 19.96 m (65.5 ft) west of the back of curb on the west
side of Eisenhower Boulevard, 11.49 m (37.7 ft) north of the centerline of SR
84, 1.74 m (5.7 ft) NE of a metal flagpole, and 1.56 m (0.9 ft) SW of the edge
of a concrete slab surrounding a flagpole.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  6

                                                                                
Station ID: 8722951                         PUBLICATION DATE:  09/02/2011
Name:       PORT EVERGLADES, LAKE MABEL                       
            FL
NOAA Chart: 11470                           Latitude:   26°  5.5' N (  26.09170)
USGS Quad:  PORT EVERGLADES                 Longitude:  80°  7.4' W ( -80.12330)


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


                         BENCH MARK STAMPING:  G 239 1965
                         DESIGNATION:          G 239

MONUMENTATION:           Bench Mark disk                       VM#:        19061
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AD2479
SETTING CLASSIFICATION:  Concrete Monument                     OPUS PID:        
LATITUDE:   26°  5.5' N (  26.09167)          LONGITUDE:  80°  8.1' W ( -80.13500)


The bench mark is a disk set flush in the top of a concrete monument projecting
5.18 cm (0.17 ft) above the level of the ground and about the same level as the
street, 29.32 m (96.2 ft) south of the centerline of State Road 84, 18.29 m
(60.0 ft) east of (parallel to SR 84) a sign reading ENTERING PORT EVERGLADES,
9.81 m (32.2 ft) south of a chain-link fence corner, 0.37 m (1.2 ft) west of a
chain-link fence, and 0.30 m (1.0 ft) west of a carsonite witness post.

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

                                                                                
Station ID: 8722951                         PUBLICATION DATE:  09/02/2011
Name:       PORT EVERGLADES, LAKE MABEL                       
            FL
NOAA Chart: 11470                           Latitude:   26°  5.5' N (  26.09170)
USGS Quad:  PORT EVERGLADES                 Longitude:  80°  7.4' W ( -80.12330)


                            T I D A L   D A T U M S 


Tidal datums at PORT EVERGLADES, LAKE MABEL based on:

     LENGTH OF SERIES:      3 YEARS
     TIME PERIOD:           October 1970 - September 1973
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8723170 MIAMI BEACH (CITY PIER)


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

     HIGHEST OBSERVED WATER LEVEL (10/25/1973)         =  1.347
     MEAN HIGHER HIGH WATER                     MHHW   =  0.856
     MEAN HIGH WATER                            MHW    =  0.821
     North American Vertical Datum              NAVD88 =  0.684
     MEAN SEA LEVEL                             MSL    =  0.437
     MEAN TIDE LEVEL                            MTL    =  0.435
     MEAN LOW WATER                             MLW    =  0.049
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (04/26/1971)         = -0.387

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     NO 4 1934                                   1.896    1.075
     TIDAL 2 RESET 1936                          1.826    1.005
     TIDAL 3 RESET 1936                          2.329    1.508
     F 239 1965                                  3.170    2.349
     J 311 1970                                  3.110    2.289
     G 239 1965                                  2.683    1.862


Foot Notes:

Geodetic heights of the bench marks meet all NOAA/NOS/NGS quality control
standards for Second Order, Class 1 leveling.  It is advised that a confirmation
set of levels be established for bench marks G 239 1965 and J 311 1970 to verify
height differences before using tidal bench mark elevation information.

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

                                                                                
Station ID: 8722951                         PUBLICATION DATE:  09/02/2011
Name:       PORT EVERGLADES, LAKE MABEL                       
            FL
NOAA Chart: 11470                           Latitude:   26°  5.5' N (  26.09170)
USGS Quad:  PORT EVERGLADES                 Longitude:  80°  7.4' W ( -80.12330)


                             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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