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Bench Mark Sheet for 8726724, Clearwater Beach 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  7

                                                                                
Station ID: 8726724                                PUBLICATION DATE:  06/21/2011
Name:       CLEARWATER BEACH, GULF OF MEXICO                  
            FLORIDA
NOAA Chart: 11412                                  Latitude:         27° 58.7' N
USGS Quad:  CLEARWATER                             Longitude:        82° 49.9' W


To reach the tidal bench marks from the intersection of U.S. Highway 19 and
State Road 60 (Gulf to Bay Boulevard), proceed approximately 10 km (6 mi) west
across Memorial Causeway to Causeway Boulevard, then across Gulfview Boulevard
to the public parking area for Big Pier 60.  The bench marks are located in the
vicinity of the Clearwater Marina and the tide gage is located at the seaward
end of Big Pier 60 just east of the T-end.


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


                 PRIMARY BENCH MARK STAMPING:  LP 10 RM 1
                         DESIGNATION:          LP 10 1 FLHD

MONUMENTATION:           Survey disk                               VM#:      742
AGENCY:                  Florida Highway Department (FLHD)         PID#:  AG7197
SETTING CLASSIFICATION:  Massive retaining wall


The primary bench mark is a survey disk set in a 0.46 m (1.51 ft) wide concrete
sea wall near the SW corner of the Clearwater Marina Yacht Basin, on the east
side of the T-intersection of Coronado Drive and Gulfview Boulevard, directly
underneath an iron handrail, 11.52 m (37.8 ft) east of the centerline of
Coronado Drive, and 0.3 m (1 ft) north of the curve in the sea wall.



                         BENCH MARK STAMPING:  AWL 1941
                         DESIGNATION:          AWL USE

MONUMENTATION:           Survey disk                               VM#:      744
AGENCY:                  US Army Corps of Engineers (USE)          PID#:  AG0307
SETTING CLASSIFICATION:  Concrete sea wall


The bench mark is a disk set flush in the top center of a 0.61 m (2.0 ft) wide
concrete sea wall midway between the old and new Causeway Boulevard bridges,
12.50 m (41.01 ft) north of the centerline of the old bridge (now a fishing
pier), 9.11 m (29.89 ft) SE of the SW abutment of the new bridge, and 7.47 m
(24.51 ft) south of the south side of the new bridge.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  7

                                                                                
Station ID: 8726724                                PUBLICATION DATE:  06/21/2011
Name:       CLEARWATER BEACH, GULF OF MEXICO                  
            FLORIDA
NOAA Chart: 11412                                  Latitude:         27° 58.7' N
USGS Quad:  CLEARWATER                             Longitude:        82° 49.9' W


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


                         BENCH MARK STAMPING:  6724 A 1978
                         DESIGNATION:          872 6724 A TIDAL

MONUMENTATION:           Tidal Station disk                        VM#:      745
AGENCY:                  National Ocean Survey (NOS)               PID#:  AG7196
SETTING CLASSIFICATION:  Concrete sea wall


The bench mark is a disk set flush in the concrete sea wall cap at the NW corner
of the Clearwater Marina, 11.43 m (37.5 ft) east of the centerline of Coronado
Drive, 4.57 m (14.99 ft) south of concrete pole 35 at the NW corner of the
Marina, and 0.15 m (0.49 ft) north of the handrail around the sidewalk at the
west end of the marina parking lot.



                         BENCH MARK STAMPING:  6724 K 1978
                         DESIGNATION:          872 6724 K

MONUMENTATION:           Tidal Station disk                        VM#:      746
AGENCY:                  National Ocean Survey (NOS)               PID:         
SETTING CLASSIFICATION:  Concrete sea wall


The bench mark is a disk set flush in the top of a concrete sea wall on the
north side of the Clearwater Marina Yacht Basin in line with the west face of
the Marina Building, 10.76 m (35.3 ft) ESE of a fire hydrant, and 7.62 m (25.0
ft) south of the SW corner of the Marina Building.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  7

                                                                                
Station ID: 8726724                                PUBLICATION DATE:  06/21/2011
Name:       CLEARWATER BEACH, GULF OF MEXICO                  
            FLORIDA
NOAA Chart: 11412                                  Latitude:         27° 58.7' N
USGS Quad:  CLEARWATER                             Longitude:        82° 49.9' W


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


                         BENCH MARK STAMPING:  6724 L 1978
                         DESIGNATION:          872 6724 L

MONUMENTATION:           Tidal Station disk                        VM#:      747
AGENCY:                  National Ocean Survey (NOS)               PID:         
SETTING CLASSIFICATION:  Concrete sea wall


The bench mark is a disk set flush in the top of the concrete sea wall at the SE
corner of the Clearwater Marina, 12.19 m (39.99 ft) south of the centerline of
the Baithouse Pier, 0.3 m (1.0 ft) west of the east edge of the sea wall, and
0.3 m (1 ft) north of the south edge of the sea wall.  NOTE: A 2 m (6.5 ft) rod
to level this mark under overhang.



                         BENCH MARK STAMPING:  DE 3
                         DESIGNATION:          DE 3 C of C

MONUMENTATION:           Survey disk                               VM#:      749
AGENCY:                  City of Clearwater                        PID#:  AG0482
SETTING CLASSIFICATION:  Curb


The bench mark is a disk set flush in a concrete curb at the NE corner of the
Clearwater Marina near the Post Office Ramp, 30.42 m (99.8 ft) south of Causeway
Boulevard, 4.57 m (14.99 ft) NNE of the NE corner of the Post Office, 0.09 m
(0.3 ft) from the end of the north curb, and 0.09 m (0.3 ft) from the end of the
east curb.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  7

                                                                                
Station ID: 8726724                                PUBLICATION DATE:  06/21/2011
Name:       CLEARWATER BEACH, GULF OF MEXICO                  
            FLORIDA
NOAA Chart: 11412                                  Latitude:         27° 58.7' N
USGS Quad:  CLEARWATER                             Longitude:        82° 49.9' W


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


                         BENCH MARK STAMPING:   
                         DESIGNATION:          872 6724 NO STAMPING 1

MONUMENTATION:           Survey disk                               VM#:      750
AGENCY:                  Florida State Road Department (FLSRD)     PID:         
SETTING CLASSIFICATION:  Bridge abutment


The bench mark is a disk set flush in the top center of a 0.27 m (0.89 ft) wide
concrete abutment at the SW end of the Causeway Boulevard bridge (marked
H-20-44), 11.13 m (36.52 ft) south of the centerline of the bridge, 2.26 m (7.41
ft) west of the SW abutment, and 0.85 m (2.79 ft) above the sidewalk.



                         BENCH MARK STAMPING:  R 44 PNLS 97
                         DESIGNATION:          872 6724 R 44

MONUMENTATION:           Survey disk                               VM#:    13662
AGENCY:                  Florida Department of Natural Resources
                         (FLDNR)                                   PID#:  AG6373
SETTING CLASSIFICATION:  Concrete housing


The bench mark is a disk set on the NW corner of a 2 m x 4 m (6.6 ft x 13.1ft)
concrete utility housing on the west side of the Clearwater Beach Concession
Building and south of the east end of the Big 60 Pier, approximately 60 m (196.8
ft) NE of bench mark 6724 N 1984, 11.31 m (37.11 ft) SSW of the corner
intersection of the west edge and sidewalk leading to Big 60 Pier, 7.10 m (23.29
ft) NW of the SW corner of the concrete foundation of the deck of the Clearwater
Beach Concession Building, and 2.71 m (8.89 ft) west of the west edge of the
sidewalk that runs north and south.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  7

                                                                                
Station ID: 8726724                                PUBLICATION DATE:  06/21/2011
Name:       CLEARWATER BEACH, GULF OF MEXICO                  
            FLORIDA
NOAA Chart: 11412                                  Latitude:         27° 58.7' N
USGS Quad:  CLEARWATER                             Longitude:        82° 49.9' W


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


                         BENCH MARK STAMPING:  1599DA11A
                         DESIGNATION:          872 6724 1599DA11A

MONUMENTATION:           Survey disk                               VM#:    16236
AGENCY:                  Florida Department of Natural Resources
                         (FLDNR)                                   PID:         
SETTING CLASSIFICATION:  Pier deck


The bench mark is a disk set in the concrete pier deck in the Big Pier 60 on the
south side and in between two shelters on the inshore end of the pier, 25.36 m
(83.2 ft) east of the south support of the second shelter out from the shore
end, 14.14 m (46.39 ft) west of the first shelters SW support, 5.47 m (17.95 ft)
south of the north edge of the pier, and 0.62 m (2.03 ft) north of the south
edge of the pier.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  7

                                                                                
Station ID: 8726724                                PUBLICATION DATE:  06/21/2011
Name:       CLEARWATER BEACH, GULF OF MEXICO                  
            FLORIDA
NOAA Chart: 11412                                  Latitude:         27° 58.7' N
USGS Quad:  CLEARWATER                             Longitude:        82° 49.9' W


                            T I D A L   D A T U M S 


Tidal datums at CLEARWATER BEACH, GULF OF MEXICO based on:

     LENGTH OF SERIES:      12 YEARS
     TIME PERIOD:           Jan. 1997 - Dec. 2007 & Aug. 2008 - Jul. 2009
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8727520 CEDAR KEY, GULF OF MEXICO


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

     HIGHEST OBSERVED WATER LEVEL (03/13/1993)         =  2.060
     MEAN HIGHER HIGH WATER                     MHHW   =  0.841
     MEAN HIGH WATER                            MHW    =  0.737
     North American Vertical Datum              NAVD88 =  0.539
     MEAN SEA LEVEL                             MSL    =  0.452
     MEAN TIDE LEVEL                            MTL    =  0.446
     MEAN LOW WATER                             MLW    =  0.155
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (01/19/1977)         = -0.784

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     LP 10 RM 1                                  1.706    0.969
     AWL 1941                                    2.743    2.006
     6724 A 1978                                 1.743    1.006
     6724 K 1978                                 1.730    0.993
     6724 L 1978                                 1.722    0.985
     DE 3                                        1.985    1.248
     872 6724 NO STAMPING 1                      5.520    4.783
     R 44 PNLS 97                                2.516    1.779
     1599DA11A                                   3.182    2.445


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of  7

                                                                                
Station ID: 8726724                                PUBLICATION DATE:  06/21/2011
Name:       CLEARWATER BEACH, GULF OF MEXICO                  
            FLORIDA
NOAA Chart: 11412                                  Latitude:         27° 58.7' N
USGS Quad:  CLEARWATER                             Longitude:        82° 49.9' W


                             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 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 8726724 Clearwater Beach, FL

Revised: 10/15/2013
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services