U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 8720023 PUBLICATION DATE: 01/26/2010
Name: CHESTER, BELLS RIVER
FL
NOAA Chart: 11503 Latitude: 30° 41.0' N ( 30.68330)
USGS Quad: ST. MARYS Longitude: 81° 32.0' W ( -81.53330)
To reach the mark from the junction of Sate Road A1A (State Road 200), Scott
Road and County Road 107 in ONeil, go NW on State Road A1A for 3.38 km (2.1 mi)
to the junction of Amelia Concourse and Chester Road, turn right on Chester Road
and go north for 5.955 km (3.7 mi) to the junction of Blackrock Road on the
right, turn right on Blackrock Road and go east for 0.32 km (0.2 mi) to the
junction of Mitchell Road on the turn left on Mitchell Road and go NE for 0.24
km (0.15 mi) to the junction of Daniel Mitchell Road and go NE for 0.24 km (0.15
mi) to the junction of Daniel Lane on the left, turn left on Daniel Lane and go
NW for 0.16 km (0.1 mi) to property address 3459 on the right and the mark in a
private yard. The bench marks are along Blackrock Road and the property at 3459
Daniel Lane. The tide gage and staff were on the east side of an 18 m (60.0 ft)
wooden dock located on the property.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 0023 C 1978
DESIGNATION: 872 0023 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 4984
AGENCY: National Ocean Survey (NOS) IDB PID#: BC1514
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 30° 41.3' N ( 30.68833) LONGITUDE: 81° 32.2' W ( -81.53670)
The primary bench mark is a disk set in the top of a round concrete monument,
flush with the ground, on the property at 3459 Daniel Lane, 15.48 m (50.8 ft)
ESE of the NE corner of a screened porch attached to a two story frame house,
14.6 m (48.0 ft) SE of a 36-inch oak tree, 9.75 m (32.0 ft) SW of the south top
of the bank of the Bells River, 4.88 m (16.0 ft) SW of a 6-inch by 8-inch wooden
fence post, and 0.3 m (1 ft) NW of a carsonite witness post. NOTE: A magnet
was buried at the south side of the mark.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 8720023 PUBLICATION DATE: 01/26/2010
Name: CHESTER, BELLS RIVER
FL
NOAA Chart: 11503 Latitude: 30° 41.0' N ( 30.68330)
USGS Quad: ST. MARYS Longitude: 81° 32.0' W ( -81.53330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 3 CHESTER 1934
DESIGNATION: 872 0023 TIDAL 3
MONUMENTATION: Tidal Station disk VM#: 4982
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: BC1512
SETTING CLASSIFICATION: Set in Concrete in a Clay Tile Pipe OPUS PID:
LATITUDE: 30° 41.0' N ( 30.68333) LONGITUDE: 81° 32.2' W ( -81.53670)
The bench mark is a disk set in the top of a concrete filled clay tile pipe
projecting 0.09 m (0.3 ft) above the level of the ground, on the property of
3459 Daniel Lane, located about 50.9 m (167.0 ft) south of the south bank of the
Bells River, 26.4 m (86.7 ft) SE from the SE corner of a 2-story frame house and
5.18 m (17.0 ft) NW of a hogwire fence along the east line of the property, 9.14
m (30.0 ft) east of the southerly projection of the east face of the two-story
frame house, and 1.82 m (6.0 ft) NE of the NE corner of an old combined garage
and shed. NOTE: A magnet was buried at the south side of the mark.
BENCH MARK STAMPING: NO 4 1952
DESIGNATION: 872 0023 TIDAL 4
MONUMENTATION: Tidal Station disk VM#: 4983
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: BC1513
SETTING CLASSIFICATION: Concrete step OPUS PID:
LATITUDE: 30° 41.0' N ( 30.68333) LONGITUDE: 81° 32.2' W ( -81.53670)
The bench mark is a disk set flush in the bottom concrete step to a screened
porch on the east side of a two story frame house, on the property of 3459
Daniel Lane, 1.22 m (4.0 ft) south of the screened porch, 0.91 m (3.0 ft) east
of the east face of the house, 0.21 m (0.7 ft) west of the east edge of the
step, and 0.06 m (0.2 ft) above the level of the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 8720023 PUBLICATION DATE: 01/26/2010
Name: CHESTER, BELLS RIVER
FL
NOAA Chart: 11503 Latitude: 30° 41.0' N ( 30.68330)
USGS Quad: ST. MARYS Longitude: 81° 32.0' W ( -81.53330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0023 E 1978
DESIGNATION: 872 0023 E TIDAL
MONUMENTATION: Tidal Station disk VM#: 4986
AGENCY: National Ocean Survey (NOS) IDB PID#: BC1510
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 30° 40.2' N ( 30.67000) LONGITUDE: 81° 32.0' W ( -81.53330)
The bench mark is a disk set in a concrete monument, flush with the ground,
located 43.3 m (142 ft) NW of center of Wisteria Lane, 14.94 m (49.0 ft) SE of
the centerline of the pavement of Blackrock Road, 6.71 m (22.0 ft) SSW of a
wooden power pole No. 14610477904, 10.97 m (36.0 ft) east of the east end of a
36-inch concrete culvert under Blackrock Road, and 0.3 m (1.0 ft) north of a
carsonite witness post. NOTE: A magnet was buried at the south side of the
mark.
BENCH MARK STAMPING: 0023 F 2004
DESIGNATION: 872 0023 F TIDAL
MONUMENTATION: Tidal Station disk VM#: 19179
AGENCY: Florida Dept. of Environmental
Protection (FLDEP) IDB PID#:
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 30° 40.8' N ( 30.68000) LONGITUDE: 81° 32.3' W ( -81.53833)
The bench mark is a disk set in the top of a round concrete monument flush with
the ground, located 15 m (49.5 ft) NW of a wooden power pole, 10.36 m (34.0 ft)
SSW of centerline of Blackrock Road, 9.45 m (31.0 ft) NW of the NE corner gate
post of a 1.22 m (4.0 ft) high chain link cemetery fence, 0.67 m (2.2 ft) SW of
a 6-inch square concrete highway right of way post, and 0.52 m (1.7 ft) east of
a north-south portion of the 1.22 m (4.0 ft) high chain link cemetery fence and
a carsonite witness post in the fence line. NOTE: A magnet was buried at
the south side of the mark.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 8720023 PUBLICATION DATE: 01/26/2010
Name: CHESTER, BELLS RIVER
FL
NOAA Chart: 11503 Latitude: 30° 41.0' N ( 30.68330)
USGS Quad: ST. MARYS Longitude: 81° 32.0' W ( -81.53330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0023 G 2004
DESIGNATION: 872 0023 G TIDAL
MONUMENTATION: Flange-encased Rod VM#: 19180
AGENCY: National Geodetic Survey (NGS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: BBFC39
LATITUDE: 30° 40.8' N ( 30.68000) LONGITUDE: 81° 32.2' W ( -81.53667)
The bench mark is a flange encased rod located 35.05 m (115.0 ft) west of the
center of Mitchell Road (a sand road), 13.11 m (43.0 ft) north of the centerline
of Blackrock Road, 9.8 m (32.2 ft) east of a wooden power pole, and 0.61 m (2.0
ft) south of a 1.22 m (4.0 ft) high chain link fence and carsonite witness post.
The datum point is accessed through a 5-inch NGS logo cap flush with the ground
and level with Blackrock Road, recessed 0.09 m (0.3 ft) below the level of the
NGS logo cap, and crimped to the top of a stainless steel rod driven 16.9 m
(55.7 ft) to refusal. NOTE: A magnet was buried at the south side of the
mark.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 8720023 PUBLICATION DATE: 01/26/2010
Name: CHESTER, BELLS RIVER
FL
NOAA Chart: 11503 Latitude: 30° 41.0' N ( 30.68330)
USGS Quad: ST. MARYS Longitude: 81° 32.0' W ( -81.53330)
T I D A L D A T U M S
Tidal datums at CHESTER, BELLS RIVER based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: February 1978 - April 1978
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8720030 FERNANDINA BEACH, AMELIA RIVER
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 2.080
MEAN HIGH WATER MHW = 1.974
North American Vertical Datum NAVD88 = 1.184
MEAN SEA LEVEL MSL = 1.071
MEAN TIDE LEVEL MTL = 1.019
MEAN LOW WATER MLW = 0.064
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
0023 C 1978 4.015 2.041
NO 3 CHESTER 1934 4.758 2.784
NO 4 1952 4.346 2.372
0023 E 1978 6.025 4.051
0023 F 2004 8.170 6.196
0023 G 2004 6.974 5.000
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 0023 F 2004 and 0023 G 2004 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: 8720023 PUBLICATION DATE: 01/26/2010
Name: CHESTER, BELLS RIVER
FL
NOAA Chart: 11503 Latitude: 30° 41.0' N ( 30.68330)
USGS Quad: ST. MARYS Longitude: 81° 32.0' W ( -81.53330)
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.