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Datums Page Page 1 of 6
Station ID: 8729154 PUBLICATION DATE: 02/13/2004
Name: BURNT MILL CREEK, WEST BAY
FL
NOAA Chart: 11390 Latitude: 30° 19.7' N ( 30.32830)
USGS Quad: WEST BAY Longitude: 85° 45.8' W ( -85.76330)
To reach the tidal bench marks from the intersection of State Highway 79 and
State Road 388 in West Bay, proceed east on State Road 388 for 9.3 km (5.8 mi)
to the intersection of South Burnt Mill Creek Road, then turn right and proceed
south on South Burnt Mill Creek Road for 0.24 km (0.15 mi) to the residence of
C.L. Boyd. The bench marks are in the vicintiy of the Boyd residence and along
State Road 388. The tide gage and staff were located on the dock behind the
Boyd residence.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 9154 A 1976
DESIGNATION: 872 9154 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 10027
AGENCY: National Ocean Survey (NOS) IDB PID#: BE2977
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 30° 19.7' N ( 30.32830) LONGITUDE: 85° 45.7' W ( -85.76170)
The primary bench mark is a disk located 54.86 m (180.0 ft) east of bench mark
9154 C 1976, 13.78 m (45.2 ft) south of the centerline of State Road 388, 5.27 m
(17.3 ft) east of the centerline of South Burnt Mill Creek Road, and 0.40 m (1.3
ft) west powerline pole #60207-48510. The bench mark is set 0.15 m (0.5 ft)
below ground level, crimped to the top of a copper-clad steel rod driven an
unspecified depth to refusal, and encased in a PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 8729154 PUBLICATION DATE: 02/13/2004
Name: BURNT MILL CREEK, WEST BAY
FL
NOAA Chart: 11390 Latitude: 30° 19.7' N ( 30.32830)
USGS Quad: WEST BAY Longitude: 85° 45.8' W ( -85.76330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9154 B 1976
DESIGNATION: 872 9154 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 10028
AGENCY: National Ocean Survey (NOS) IDB PID#: BE2978
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 30° 19.6' N ( 30.32670) LONGITUDE: 85° 45.7' W ( -85.76170)
The bench mark is a disk located on the property of C.L. Boyd, 221 m (726 ft)
south of bench mark 9154 A 1976, 38.56 m (126.5 ft) east of the SE corner of the
Boyd residence, 7.62 m (25.0 ft) WSW of the centerline of South Burnt Mill Creek
Road, and 0.85 m (2.8 ft) north of a power pole. The bench mark is set 0.18 m
(0.6 ft) below ground level, crimped to the top of a copper-clad steel rod
driven an unspecified depth to refusal, and encased in a PVC pipe and concrete
kickblock.
BENCH MARK STAMPING: 9154 C 1976
DESIGNATION: 872 9154 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 10029
AGENCY: National Ocean Survey (NOS) IDB PID#: BE2979
SETTING CLASSIFICATION: Concrete culvert head wall OPUS PID#: BE2979
LATITUDE: 30° 19.7' N ( 30.32830) LONGITUDE: 85° 45.8' W ( -85.76330)
The bench mark is a disk set in top center of a concrete culvert headwall, 67 m
(220 ft) east of the east end of the State Road 388 bridge over Burnt Mill
Creek, 46.33 m (152.0 ft) west of the centerline of South Burnt Mill Creek Road,
and 8.17 m (26.8 ft) south of the centerline of the highway.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 8729154 PUBLICATION DATE: 02/13/2004
Name: BURNT MILL CREEK, WEST BAY
FL
NOAA Chart: 11390 Latitude: 30° 19.7' N ( 30.32830)
USGS Quad: WEST BAY Longitude: 85° 45.8' W ( -85.76330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9154 F
DESIGNATION: 872 9154 F TIDAL FLDT
MONUMENTATION: Survey disk VM#: 10032
AGENCY: Florida Department of Transportation
(FLDT) IDB PID#: BE2980
SETTING CLASSIFICATION: Concrete bridge rail OPUS PID#: BE2980
LATITUDE: 30° 19.7' N ( 30.32830) LONGITUDE: 85° 45.8' W ( -85.76330)
The bench mark is a disk set in the top of the bridge railing at the NE corner
of the State Road 388 bridge over Burnt Mill Creek, 5.79 m (19.0 ft) north of
the centerline of the highway, 1.07 m (3.5 ft) west of the east end of the
railing, and 0.91 m (3.0 ft) above the level of the road.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 8729154 PUBLICATION DATE: 02/13/2004
Name: BURNT MILL CREEK, WEST BAY
FL
NOAA Chart: 11390 Latitude: 30° 19.7' N ( 30.32830)
USGS Quad: WEST BAY Longitude: 85° 45.8' W ( -85.76330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: C 42 1934 20.738
DESIGNATION: C 42
MONUMENTATION: Bench Mark disk VM#: 10033
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: BE0615
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 30° 19.8' N ( 30.33000) LONGITUDE: 85° 45.7' W ( -85.76170)
The bench mark is a disk set in the top of a concrete monument, 0.3 km (0.2 mi)
east of the east end of the State Road 388 bridge over Burnt Mill Creek, 128 m
(419 ft) north of the centerline of the highway, 13.72 m (45.0 ft) west of the
centerline of another logging road, 0.3 m (1 ft) west of a witness post, and at
ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 8729154 PUBLICATION DATE: 02/13/2004
Name: BURNT MILL CREEK, WEST BAY
FL
NOAA Chart: 11390 Latitude: 30° 19.7' N ( 30.32830)
USGS Quad: WEST BAY Longitude: 85° 45.8' W ( -85.76330)
T I D A L D A T U M S
Tidal datums at BURNT MILL CREEK, WEST BAY based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: October 1976 - December 1976
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8729840 PENSACOLA, PENSACOLA BAY
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.433
MEAN HIGH WATER MHW = 0.404
MEAN TIDE LEVEL MTL = 0.218
MEAN SEA LEVEL MSL = 0.205
North American Vertical Datum NAVD88 = 0.156
MEAN LOW WATER MLW = 0.033
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
9154 A 1976 5.031 4.627
9154 B 1976 3.729 3.325
9154 C 1976 4.524 4.120
9154 F 5.014 4.610
C 42 1934 20.738 6.357 5.953
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 8729154 PUBLICATION DATE: 02/13/2004
Name: BURNT MILL CREEK, WEST BAY
FL
NOAA Chart: 11390 Latitude: 30° 19.7' N ( 30.32830)
USGS Quad: WEST BAY Longitude: 85° 45.8' W ( -85.76330)
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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Station Location
Published bench mark
Unpublished bench mark