U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8727512 PUBLICATION DATE: 01/06/2004
Name: FOWLER BLUFF, SUWANNEE RIVER
FL
NOAA Chart: 11408 Latitude: 29° 23.9' N ( 29.39830)
USGS Quad: VISTA Longitude: 83° 1.4' W ( -83.02330)
To reach the tidal bench marks from the intersection of State Road 345 and U.S.
Highway 19 in Chiefland, proceed SW on State Road 345 for 9.3 km (5.8 mi) to the
intersection of County Road C-347, then turn right and proceed west on County
Road C-347 for 14.8 km (9.2 mi) to the junction of road County Road LCR 448,
then turn right and proceed west on County Road LCR 448 for 0.5 km (0.3 mi) to
the Treasure Fish Camp in the community of Fowlers Bluff. The bench marks are
located along County Road LCR 448. The tide gage and staff were located on the
Treasure Fish Camp dock.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 7512 E 1978
DESIGNATION: 872 7512 E TIDAL
MONUMENTATION: Tidal Station disk VM#: 8205
AGENCY: National Ocean Survey (NOS) IDB PID#: AR1674
SETTING CLASSIFICATION: Galvanized steel rod OPUS PID:
LATITUDE: 29° 23.8' N ( 29.39670) LONGITUDE: 83° 1.4' W ( -83.02330)
The primary bench mark is a disk located 94 m (310 ft) ENE of bench mark 7512 D
1978, 11 m (37 ft) NNE of the centerline of the easternmost gate in a redwood
fence, 6 m (21 ft) NNW of the centerline of road LCR 448, and 1.68 m (5.5 ft)
SSE of the edge of the redwood fence with a witness sign attached. The bench
mark is set at ground level, crimped to the top of a galvanized steel rod driven
9.8 m (32 ft) to refusal, and encased in a PVC pipe and concrete kickblock.
NOTE: Mark not found in 2000 by Florida Department of Environmental Protection.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8727512 PUBLICATION DATE: 01/06/2004
Name: FOWLER BLUFF, SUWANNEE RIVER
FL
NOAA Chart: 11408 Latitude: 29° 23.9' N ( 29.39830)
USGS Quad: VISTA Longitude: 83° 1.4' W ( -83.02330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 7512 A 1978
DESIGNATION: 872 7512 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 8201
AGENCY: National Ocean Survey (NOS) IDB PID#: AR1678
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 29° 23.8' N ( 29.39670) LONGITUDE: 83° 1.5' W ( -83.02500)
The bench mark is a disk set in the top of a round concrete monument located
near the Treasure Fish Camp boat ramp, 20.42 m (67.0 ft) NW of the NW corner of
the Treasure Fish Camp Store, 5.79 m (19.0 ft) east of the centerline of the
boat ramp, 1.22 m (4.0 ft) east of a powerline pole with a witness sign
attached, and 0.03 m (0.1 ft) below ground level.
BENCH MARK STAMPING: 7512 B 1978
DESIGNATION: 872 7512 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 8202
AGENCY: National Ocean Survey (NOS) IDB PID#: AR1677
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 29° 23.8' N ( 29.39670) LONGITUDE: 83° 1.5' W ( -83.02500)
The bench mark is a disk set in the top of a round concrete monument, located
across the road from the Fish Camp Store, 7.32 m (24.0 ft) south of the
approximate centerline of road LCR 448, 7 m (23 ft) east of the east end of a
row of mailboxes, 0.76 m (2.5 ft) SW of a power pole.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8727512 PUBLICATION DATE: 01/06/2004
Name: FOWLER BLUFF, SUWANNEE RIVER
FL
NOAA Chart: 11408 Latitude: 29° 23.9' N ( 29.39830)
USGS Quad: VISTA Longitude: 83° 1.4' W ( -83.02330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 7512 C 1978
DESIGNATION: 872 7512 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 8203
AGENCY: National Ocean Survey (NOS) IDB PID#: AR1676
SETTING CLASSIFICATION: Concrete monument OPUS PID#: AR1676
LATITUDE: 29° 23.8' N ( 29.39670) LONGITUDE: 83° 1.5' W ( -83.02500)
The bench mark is a disk set in top of a round concrete monument, 6.40 m (21.0
ft) south of the centerline of road LCR 448, 0.91 m (3.0 ft) north of a power
pole with a witness sign attatched, and 0.05 m (0.2 ft) below ground level.
BENCH MARK STAMPING: 7512 D 1978
DESIGNATION: 872 7512 D TIDAL
MONUMENTATION: Tidal Station disk VM#: 8204
AGENCY: National Ocean Survey (NOS) IDB PID#: AR1675
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 29° 23.8' N ( 29.39670) LONGITUDE: 83° 1.5' W ( -83.02500)
The bench mark is a disk set in a round concrete monument, 30.48 m (100.0 ft) SW
of mailbox number 15116, 22.86 m (75.0 ft) SW of a driveway, 12.19 m (40.0 ft)
north and across the SE side from the approximate centerline of a concrete
driveway leading south, 7.32 m (24.0 ft) NW of the centerline of road LCR 448,
3.96 m (13.0 ft) NE of the south end of a 2 m (8 ft) tall wooden fence, 1.16 m
(3.8 ft) SE of a metal witness post, and 0.05 m (0.2 ft) below ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8727512 PUBLICATION DATE: 01/06/2004
Name: FOWLER BLUFF, SUWANNEE RIVER
FL
NOAA Chart: 11408 Latitude: 29° 23.9' N ( 29.39830)
USGS Quad: VISTA Longitude: 83° 1.4' W ( -83.02330)
T I D A L D A T U M S
Tidal datums at FOWLER BLUFF, SUWANNEE RIVER based on:
LENGTH OF SERIES: 4 MONTHS
TIME PERIOD: September 1978 - December 1978
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:
MEAN HIGHER HIGH WATER MHHW = 0.660
MEAN HIGH WATER MHW = 0.591
MEAN SEA LEVEL MSL = 0.357
MEAN TIDE LEVEL MTL = 0.342
North American Vertical Datum NAVD88 = 0.166
MEAN LOW WATER MLW = 0.092
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
7512 E 1978 2.122 1.531
7512 A 1978 2.090 1.499
7512 B 1978 1.886 1.295
7512 C 1978 2.284 1.693
7512 D 1978 2.279 1.688
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8727512 PUBLICATION DATE: 01/06/2004
Name: FOWLER BLUFF, SUWANNEE RIVER
FL
NOAA Chart: 11408 Latitude: 29° 23.9' N ( 29.39830)
USGS Quad: VISTA Longitude: 83° 1.4' W ( -83.02330)
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.