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Bench Mark Sheet for 8720855, Crescent City 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8720855                         PUBLICATION DATE:  05/22/2009
Name:       CRESCENT CITY, CRESCENT LAKE                      
            FL
NOAA Chart: 11492                           Latitude:   29° 25.8' N (  29.43000)
USGS Quad:  CRESCENT CITY                   Longitude:  81° 30.4' W ( -81.50670)


To reach the tidal bench marks from the intersection of U.S. Highway 17 and
Central Avenue in Crescent City, proceed east on Central Avenue for 0.40 km
(0.25 mi) to the dead end at the public boat ramp and pier.  The bench marks are
located along Central Avenue, the pier, and in the vicinity of the water tower
at Crescent City Water Works.  The tide gage and staff were at the south end of
the T-shaped pier.


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


                 PRIMARY BENCH MARK STAMPING:  5A AMC 1979
                         DESIGNATION:          872 0855 TIDAL 5 A

MONUMENTATION:           Tidal Station disk                    VM#:         5262
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AI6988
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   29° 25.8' N (  29.43000)          LONGITUDE:  81° 30.5' W ( -81.50830)


The primary bench mark is a disk set in a concrete monument located at the SE
corner of the intersection of Central Avenue and North Park Street, 4.21 m (13.8
ft) NE of the NE corner of a building, 1.46 m (4.8 ft) SE of a utility pole,
0.91 m (3.0 ft) north of the edge of a sidewalk, and 0.91 m (3.0 ft) west of the
edge of a sidewalk.

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

                                                                                
Station ID: 8720855                         PUBLICATION DATE:  05/22/2009
Name:       CRESCENT CITY, CRESCENT LAKE                      
            FL
NOAA Chart: 11492                           Latitude:   29° 25.8' N (  29.43000)
USGS Quad:  CRESCENT CITY                   Longitude:  81° 30.4' W ( -81.50670)


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


                         BENCH MARK STAMPING:  G 421 1993
                         DESIGNATION:          G 421

MONUMENTATION:           Survey disk                           VM#:        13547
AGENCY:                  Florida Dept. of Environmental
                         Protection (FLDEP)                    IDB PID#:  AI6986
SETTING CLASSIFICATION:  Concrete sea wall                     OPUS PID#: AI6986
LATITUDE:   29° 25.8' N (  29.43000)          LONGITUDE:  81° 30.4' W ( -81.50670)


The bench mark is a disk set in the north concrete sea wall of the grass dike
located at Crescent City Pier, 30.30 m (99.4 ft) east of the NE end of the sea
wall, 17.56 m (57.6 ft) west of concrete light pole #34720 824101, 10.82 m (35.5
ft) east of concrete light pole #34720 814106, and 9.36 m (30.7 ft) SE of the NW
end of the sea wall.



                         BENCH MARK STAMPING:  0855 A 1993
                         DESIGNATION:          872 0855 A TIDAL

MONUMENTATION:           Survey disk                           VM#:        13548
AGENCY:                  Florida Dept. of Environmental
                         Protection (FLDEP)                    IDB PID#:  AI6985
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   29° 25.8' N (  29.43000)          LONGITUDE:  81° 30.4' W ( -81.50670)


The bench mark is a disk set in a concrete monument located in the grass dike
near the southern sea wall at Crescent City Pier, 24.08 m (79.0 ft) west of the
east end of the seawall, 18.59 m (61.0 ft) SE of concrete light pole #34720
814106, 12.65 m (41.5 ft) SE of concrete light pole #34720 824101, 7.62 m (25.0
ft) south of the north sea wall, and 1.65 m (5.4 ft) north of the south sea
wall.

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

                                                                                
Station ID: 8720855                         PUBLICATION DATE:  05/22/2009
Name:       CRESCENT CITY, CRESCENT LAKE                      
            FL
NOAA Chart: 11492                           Latitude:   29° 25.8' N (  29.43000)
USGS Quad:  CRESCENT CITY                   Longitude:  81° 30.4' W ( -81.50670)


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


                         BENCH MARK STAMPING:   
                         DESIGNATION:          872 0855 TIDAL 1
                         ALIAS:                NO STAMPING (1 USED)

MONUMENTATION:           Unmonumented                          VM#:        13549
AGENCY:                  Florida Dept. of Environmental
                         Protection (FLDEP)                    IDB PID#:  AI6987
SETTING CLASSIFICATION:  Granite base                          OPUS PID:        
LATITUDE:   29° 25.8' N (  29.43000)          LONGITUDE:  81° 30.6' W ( -81.51000)


The bench mark is the SE corner of the granite base of the granite column
located at the SW corner of the building (currently the Sweet Tooth Cafe) at the
NE corner of Central Avenue and Prospect Street, 11.19 m (36.7 ft) north of the
centerline of Central Avenue, 11.06 m (36.3 ft) east of the centerline of
Prospect Street, 8.56 m (28.1 ft) west of the SE corner of the building, and 0.3
m (1 ft) above the sidewalk.



                         BENCH MARK STAMPING:  NO 3 1937
                         DESIGNATION:          872 0855 TIDAL 3

MONUMENTATION:           Bench Mark disk                       VM#:        13550
AGENCY:                  US Geological Survey (USGS)           IDB PID#:  AI6990
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   29° 25.7' N (  29.42830)          LONGITUDE:  81° 30.5' W ( -81.50830)


The bench mark is a disk set in a concrete monument located in a line halfway
between the two southernmost legs of the Crescent City water tank, 32 m (105 ft)
SW of the intersection of Lake Street and Cypress Avenue, and 22.25 m (73.0 ft)
south of the centerline of Cypress Avenue.

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

                                                                                
Station ID: 8720855                         PUBLICATION DATE:  05/22/2009
Name:       CRESCENT CITY, CRESCENT LAKE                      
            FL
NOAA Chart: 11492                           Latitude:   29° 25.8' N (  29.43000)
USGS Quad:  CRESCENT CITY                   Longitude:  81° 30.4' W ( -81.50670)


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


                         BENCH MARK STAMPING:  NO 4 1952
                         DESIGNATION:          872 0855 TIDAL 4

MONUMENTATION:           Survey disk                           VM#:        13551
AGENCY:                  US Geological Survey (USGS)           IDB PID#:  AI6989
SETTING CLASSIFICATION:  Concrete mat foundation               OPUS PID:        
LATITUDE:   29° 25.7' N (  29.42830)          LONGITUDE:  81° 30.4' W ( -81.50670)


The bench mark is a disk set in a mat foundation located in the east area of the
Crescent City Water Works next to an old stone building, 42 m (137 ft) SE of the
intersection of Cypress Avenue and Lake Street, 30 m (100 ft) east of the water
tank, and 3.05 m (10.0 ft) SW of the stone building.

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

                                                                                
Station ID: 8720855                         PUBLICATION DATE:  05/22/2009
Name:       CRESCENT CITY, CRESCENT LAKE                      
            FL
NOAA Chart: 11492                           Latitude:   29° 25.8' N (  29.43000)
USGS Quad:  CRESCENT CITY                   Longitude:  81° 30.4' W ( -81.50670)


                            T I D A L   D A T U M S 


Tidal datums at CRESCENT CITY, CRESCENT LAKE based on:

     LENGTH OF SERIES:      5 MONTHS
     TIME PERIOD:           November 1993 - March 1994
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8720220 MAYPORT (FERRY DEPOT), SAINT JOHNS RIVER


Elevations of tidal datums referred to Mean Sea Level (MSL), in METERS:

     MEAN SEA LEVEL                             MSL    =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                                MSL

     5A AMC 1979                                          9.291
     G 421 1993                                           0.791
     0855 A 1993                                          0.969
     872 0855 TIDAL 1                                    13.814
     NO 3 1937                                            5.589
     NO 4 1952                                            1.499


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

                                                                                
Station ID: 8720855                         PUBLICATION DATE:  05/22/2009
Name:       CRESCENT CITY, CRESCENT LAKE                      
            FL
NOAA Chart: 11492                           Latitude:   29° 25.8' N (  29.43000)
USGS Quad:  CRESCENT CITY                   Longitude:  81° 30.4' W ( -81.50670)


                             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 8720855 Crescent City, FL

Revised: 10/15/2013
NOAA / National Ocean Service
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