U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 10
Station ID: 8722414 PUBLICATION DATE: 03/13/2009
Name: GOMEZ
FL
NOAA Chart: 11474 Latitude: 27° 5.6' N ( 27.09330)
USGS Quad: GOMEZ Longitude: 80° 8.2' W ( -80.13670)
To reach the tidal bench marks from the intersection of State Highway A1A (SE
Dixie Highway) and State Road 707 (SE Bridge Road) in Hobe Sound, proceed 0.2 km
(0.1 mi) easterly on State Road 707 to SE Gomez Avenue, then turn left and
proceed north on SE Gomez Avenue for 3.9 km (2.4 mi) to Coconut Street, then
turn right and proceed east on Coconut Street for 0.5 km (0.3 mi) to its end.
The bench marks are located on the concrete sea wall. The tide gage and staff
were located east of the bench marks on day beacon #24 on the Intracoastal
Waterway.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 3 1972
DESIGNATION: 872 2414 TIDAL 3
MONUMENTATION: Tidal Station disk VM#: 5473
AGENCY: National Ocean Survey (NOS) IDB PID#: AF6973
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 27° 5.6' N ( 27.09330) LONGITUDE: 80° 8.2' W ( -80.13670)
The primary bench mark is a disk located just west of the SW property corner at
8598 Coconut Street (Moorman Residence), 12.19 m (40.0 ft) SSE of the SW corner
of a screened-in porch and pool at the Gould Residence, and 41.85 m (137.3 ft)
west of the west tangent point of the SE corner of the sea wall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 10
Station ID: 8722414 PUBLICATION DATE: 03/13/2009
Name: GOMEZ
FL
NOAA Chart: 11474 Latitude: 27° 5.6' N ( 27.09330)
USGS Quad: GOMEZ Longitude: 80° 8.2' W ( -80.13670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 1 1972
DESIGNATION: 872 2414 TIDAL 1
MONUMENTATION: Tidal Station disk VM#: 5471
AGENCY: National Ocean Survey (NOS) IDB PID#: AF6971
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 27° 5.6' N ( 27.09330) LONGITUDE: 80° 8.2' W ( -80.13670)
The primary bench mark is a disk set flush on the concrete sea wall, 41.18 m
(135.1 ft) NE of bench mark NO 2 1972, 20 m (65 ft) north of the north tangent
point of the SE corner of the sea wall, 1 m (4 ft) south of the property line,
and 0.18 m (0.6 ft) from the seaward edge of the sea wall.
BENCH MARK STAMPING: NO 2 1972
DESIGNATION: 872 2414 TIDAL 2
MONUMENTATION: Tidal Station disk VM#: 5472
AGENCY: National Ocean Survey (NOS) IDB PID#: AF6972
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 27° 5.6' N ( 27.09330) LONGITUDE: 80° 8.2' W ( -80.13670)
The bench mark is a disk set flush in the concrete sea wall at 8598 Coconut
Street, 41.18 m (135.1 ft) SW of bench mark NO 1 1972, 27 m (88 ft) south of the
SW corner of the house at 8598 Coconut Street, 24.69 m (81.0 ft) east of bench
mark NO 3 1972, 17.16 m (56.3 ft) west of the west tangent point of the SE
corner of the sea wall, and 0.18 m (0.6 ft) north of the south edge of the sea
wall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 10
Station ID: 8722414 PUBLICATION DATE: 03/13/2009
Name: GOMEZ
FL
NOAA Chart: 11474 Latitude: 27° 5.6' N ( 27.09330)
USGS Quad: GOMEZ Longitude: 80° 8.2' W ( -80.13670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 4 1972
DESIGNATION: 872 2414 TIDAL 4
MONUMENTATION: Tidal Station disk VM#: 5474
AGENCY: National Ocean Survey (NOS) IDB PID#: AF6974
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 27° 5.6' N ( 27.09330) LONGITUDE: 80° 8.2' W ( -80.13670)
The bench mark is a disk set flush in the concrete sea wall at 8597 Coconut
Street, 29.93 m (98.2 ft) south of bench mark NO 5 1972, 22 m (72 ft) NE of the
north corner of the house at 8598 Coconut Street, and 17.28 m (56.7 ft) north of
bench mark NO 1 1972.
BENCH MARK STAMPING: NO 5 1972
DESIGNATION: 872 2414 TIDAL 5
MONUMENTATION: Tidal Station disk VM#: 5475
AGENCY: National Ocean Survey (NOS) IDB PID#: AF6975
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 27° 5.6' N ( 27.09330) LONGITUDE: 80° 8.2' W ( -80.13670)
The bench mark is a disk set flush in the concrete sea wall at 8597 Coconut
Street, 29.93 m (98.2 ft) north of bench mark NO 4 1972, 23.77 m (78.0 ft) south
of the north tangent point of the NE corner of the sea wall at 8597 Coconut
Street, and 15.18 m (49.8 ft) east of the SE corner of the house at 8597 Coconut
Street.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 10
Station ID: 8722414 PUBLICATION DATE: 03/13/2009
Name: GOMEZ
FL
NOAA Chart: 11474 Latitude: 27° 5.6' N ( 27.09330)
USGS Quad: GOMEZ Longitude: 80° 8.2' W ( -80.13670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 2414 F 1986
DESIGNATION: 872 2414 F TIDAL
MONUMENTATION: Tidal Station disk VM#: 5476
AGENCY: National Ocean Service (NOS) IDB PID#: AF7553
SETTING CLASSIFICATION: Concrete box drain OPUS PID#: AF7553
LATITUDE: 27° 5.6' N ( 27.09330) LONGITUDE: 80° 8.6' W ( -80.14330)
The bench mark is a disk set 0.09 m (0.3 ft) below the ground in the SW corner
of a concrete box drain and bears 8.66 m (28.4 ft) west of the centerline of
Gomez Avenue, 7.92 m (26.0 ft) south of the centerline of Coconut Street, and
1.13 m (3.7 ft) west of the west edge of the sidewalk.
BENCH MARK STAMPING: 2414 H TIDAL
DESIGNATION: 872 2414 H TIDAL
MONUMENTATION: Tidal Station disk VM#: 5478
AGENCY: National Ocean Service (NOS) IDB PID#: AF7555
SETTING CLASSIFICATION: Concrete box drain OPUS PID:
LATITUDE: 27° 5.6' N ( 27.09330) LONGITUDE: 80° 8.6' W ( -80.14330)
The bench mark is a disk set 0.24 m (0.8 ft) below the ground in the NW corner
of a concrete box drain and bears 8.53 m (28.0 ft) west of the centerline of
Gomez Avenue, 8.53 m (28.0 ft) north of the centerline of Palm Street, 1.58 m
(5.2 ft) west of the west edge of a sidewalk, and 64.47 m (211.5 ft) North of
2414 G 1986.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 10
Station ID: 8722414 PUBLICATION DATE: 03/13/2009
Name: GOMEZ
FL
NOAA Chart: 11474 Latitude: 27° 5.6' N ( 27.09330)
USGS Quad: GOMEZ Longitude: 80° 8.2' W ( -80.13670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: D 403 1991
DESIGNATION: D 403
MONUMENTATION: Bench Mark disk VM#: 18921
AGENCY: National Geodetic Survey (NGS) IDB PID#: AF7530
SETTING CLASSIFICATION: Stainless Steel Rod OPUS PID:
LATITUDE: 27° 4.0' N ( 27.06667) LONGITUDE: 80° 8.1' W ( -80.13500)
The bench mark is a disk located 20.54 m (67.4 ft) WNW of the NW corner of a
house, 12.71 m (41.7 ft) WNW of a utility pole, 8.99 m (29.5 ft) ENE of the near
rail, 0.30 m (1.0 ft) below the level of the track, 0.30 m (1.0 ft) ENE of a
witness post, 0.30 m (1.0 ft) ENE of a right-of-way marker, and on the extended
center of SE Pine Cone Lane. The bench mark is crimped to a stainless steel rod
driven an unspecified depth to refusal, with access to the datum point through a
5-inch logo cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 10
Station ID: 8722414 PUBLICATION DATE: 03/13/2009
Name: GOMEZ
FL
NOAA Chart: 11474 Latitude: 27° 5.6' N ( 27.09330)
USGS Quad: GOMEZ Longitude: 80° 8.2' W ( -80.13670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: E 403 1991
DESIGNATION: E 403
MONUMENTATION: Bench Mark disk VM#: 18922
AGENCY: National Geodetic survey (NGS) IDB PID#: AF7529
SETTING CLASSIFICATION: Stainless Steel Rod OPUS PID:
LATITUDE: 27° 4.8' N ( 27.08000) LONGITUDE: 80° 8.5' W ( -80.14167)
The bench mark is a disk located 28.80 m (94.5 ft) ENE of the highway
centerline, 8.11 m (26.6 ft) SSE of the center of SE Pettway Street, 7.89 m
(25.9 ft) ENE of the Near Rail of the Florida East Coast Railroad, 7.59 m (24.9
ft) SW of a utility light pole with 2 guy wires, 3.41 m (11.2 ft) NE of a
utility pole with a meter attached, and 0.40 m (1.3 ft) SSE of a witness post.
The bench mark is crimped to a stainless steel rod driven an unspecified depth
to refusal, with access to the datum point through a 5-inch logo cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 10
Station ID: 8722414 PUBLICATION DATE: 03/13/2009
Name: GOMEZ
FL
NOAA Chart: 11474 Latitude: 27° 5.6' N ( 27.09330)
USGS Quad: GOMEZ Longitude: 80° 8.2' W ( -80.13670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: PINE 1929 NO 3 1980
DESIGNATION: PINE RM 3
MONUMENTATION: Bench Mark disk VM#: 18923
AGENCY: National Geodetic Survey (NGS) IDB PID#: AF6781
SETTING CLASSIFICATION: Concrete Monument OPUS PID:
LATITUDE: 27° 5.7' N ( 27.09500) LONGITUDE: 80° 8.9' W ( -80.14833)
The bench mark is a disk located 27.31 m (89.6 ft) SW of and level with the
highway centerline, 14.11 m (46.3 ft) east of the SE corner of a house, 10.30 m
(33.8 ft) NW of the centerline of Southeast Crossrip Street, 8.29 m (27.2 ft) SW
of the SW leg of a sign (East Ridge Estates), and 0.21 m (0.7 ft) SE of a
witness post. The bench mark is recessed (0.16 ft) blow the ground surface.
BENCH MARK STAMPING: 2414 J 2005
DESIGNATION: 872 2414 J TIDAL
MONUMENTATION: Tidal Station disk VM#: 18924
AGENCY: National Geodetic Survey (NGS) IDB PID#:
SETTING CLASSIFICATION: Stainless Steel Rod OPUS PID:
LATITUDE: 27° 5.8' N ( 27.09667) LONGITUDE: 80° 8.6' W ( -80.14333)
The bench mark is a disk located 6.64 m (21.8 ft) east of the extended
centerline of SE Gomez Avenue, 6.04 m (19.8 ft) north of the centerline of SE
Cross Rip Street, 3.66 m (12.0 ft) west of the west edge of a 1.52 m (5.0 ft)
concrete sidewalk, 2.90 m (9.5 ft) south of the south edge of a 1.52 m (5.0 ft)
wide concrete sidewalk, 0.21 m (0.7 ft) south of a wooden brace pole with two
guy wires attached and 0.18 m (0.6 ft) south of a carsonite witness post. The
bench mark is a stainless steel rod driven to refusal at a depth of 20.72 m
(68.0 ft) with an NGS logo cap flush with the ground and 0.30 m (1.0 ft) below
the level of Cross Rip Street.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 10
Station ID: 8722414 PUBLICATION DATE: 03/13/2009
Name: GOMEZ
FL
NOAA Chart: 11474 Latitude: 27° 5.6' N ( 27.09330)
USGS Quad: GOMEZ Longitude: 80° 8.2' W ( -80.13670)
T I D A L D A T U M S
Tidal datums at GOMEZ based on:
LENGTH OF SERIES: 1 MONTH
TIME PERIOD: April 1973 - April 1973
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8722429 HOBE SOUND BRIDGE, HOBE SOUND
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
North American Vertical Datum NAVD88 = 0.529
MEAN HIGHER HIGH WATER MHHW = 0.476
MEAN HIGH WATER MHW = 0.438
MEAN SEA LEVEL MSL = 0.246
MEAN TIDE LEVEL MTL = 0.240
MEAN LOW WATER MLW = 0.042
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
NO 3 1972 1.193 0.755
NO 1 1972 1.170 0.732
NO 2 1972 1.183 0.745
NO 4 1972 1.209 0.771
NO 5 1972 1.208 0.770
2414 F 1986 2.019 1.581
2414 H TIDAL 1.994 1.556
D 403 1991 7.464 7.026
E 403 1991 7.244 6.806
PINE 1929 NO 3 1980 6.951 6.513
2414 J 2005 2.185 1.747
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 9 of 10
Station ID: 8722414 PUBLICATION DATE: 03/13/2009
Name: GOMEZ
FL
NOAA Chart: 11474 Latitude: 27° 5.6' N ( 27.09330)
USGS Quad: GOMEZ Longitude: 80° 8.2' W ( -80.13670)
Foot Notes:
Bench marks 2414 F 1986, 2414 H TIDAL, 2414 J 2005, D 403 1991, E 403 1991 and
Pine 1929 NO 3 1980 are based on one differential leveling connection and do not
meet the quality control standards of the NOS. Therefore, caution should be
used when deriving elevations for these marks.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 10 of 10
Station ID: 8722414 PUBLICATION DATE: 03/13/2009
Name: GOMEZ
FL
NOAA Chart: 11474 Latitude: 27° 5.6' N ( 27.09330)
USGS Quad: GOMEZ Longitude: 80° 8.2' W ( -80.13670)
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.