U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 8729905 PUBLICATION DATE: 07/08/2011
Name: MILLVIEW, PERDIDO BAY
FL
NOAA Chart: 11378 Latitude: 30° 25.1' N ( 30.41830)
USGS Quad: PENSACOLA Longitude: 87° 21.4' W ( -87.35670)
To reach the tide station by car from the intersection of Route 59-S and Route
98 in Foley, Alabama, go easterly on Route 98 for 24.3 km (15.1 mi), through the
small towns of Elberta and Lillian, to the bridge over Perdido Bay. Proceed
across the bridge southeasterly then easterly on Route 98 for 6.4 km (4.0 mi) to
the intersection of Route 98 and Route 298. Turn left on Route 298 (Lillian
Highway) and proceed northeasterly 2.68 km (1.67 mi) to the Austin house on the
left (10024 Lillian Hwy). Turn left and proceed about 115 m (375 ft) NNW
through the property, past the house, garage and shop to the small wooden dock
and the tide gauge site. The tidal bench marks are located in the vicinity.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 9905 B 1977
DESIGNATION: 872 9905 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 10303
AGENCY: National Ocean Survey (NOS) IDB PID#: BG3615
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID#: BG3615
LATITUDE: 30° 25.1' N ( 30.41830) LONGITUDE: 87° 21.3' W ( -87.35500)
The primary bench mark is located in an empty grassy lot, 300 m (984 ft) SW of
the lands owned by Gene and Johanna Austin, at 10024 Lillian Highway (Rt 298),
76.20 m (250.0 ft) south of Perdido Bay mean high water mark, 21.00 m ( 68.9 ft)
east of the centerline of the driveway that accesses the empty lot, 9.25 m
(30.35 ft) north of the centerline of Lillian Highway, and 2.40 m (7.87 ft) west
of a power pole with a light. The bench mark is set 10 cm (0.33 ft) below
ground level, crimped to the top of a copper-clad steel rod driven 12.2 m (40
ft) to refusal, and encased in a 6 inch diameter white PVC pipe (with no cover).
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 8729905 PUBLICATION DATE: 07/08/2011
Name: MILLVIEW, PERDIDO BAY
FL
NOAA Chart: 11378 Latitude: 30° 25.1' N ( 30.41830)
USGS Quad: PENSACOLA Longitude: 87° 21.4' W ( -87.35670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9905 C 1977
DESIGNATION: 872 9905 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 10304
AGENCY: National Ocean Survey (NOS) IDB PID#: BG3616
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 30° 25.1' N ( 30.41830) LONGITUDE: 87° 21.2' W ( -87.35330)
The bench mark is located directly across the street and south of the property
owned by Gene and Johanna Austin at 10024 Lillian Highway, 11.31 m (37.1 ft)
north of the NW corner of a 9 m by 6 m (29.5 by 19.7 ft) house with street
number 10015, 9.51 m (31.2 ft) south of the centerline of Lillian Highway, 9.20
m (30.2 ft) west of the east side of a drainage culvert, and 1.05m (3.44 ft)
east of power pole number P076676. The bench mark is set 10 cm (0.33 ft) below
ground, crimped to the top of a copper clad steel rod, encased in a 6 inch
diameter white PVC pipe (with no cover) that is broken off, driven 12.2 m (40
ft) to refusal and encased in a PVC pipe and concrete kickblock.
BENCH MARK STAMPING: 9905 F 2006
DESIGNATION: 872 9905 F
MONUMENTATION: Tidal Station disk VM#: 18625
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete post OPUS PID#: BBFC94
LATITUDE: 30° 25.2' N ( 30.42000) LONGITUDE: 87° 21.1' W ( -87.35170)
The bench mark is a disk set in the top of an 8 inch diameter, 1.52 m (5.0 ft)
long concrete post, 168 m (550 ft) WSW of Millview Bayou Bridge # 48002, 21.31 m
(69.9 ft) ENE of fire hydrant number 2803, 7.59 m (24.9) NNW of the centerline
of Lillian Highway, 6.40 m (21.0 ft) south of the Perdido Bay mean high water
line, 1.10 m (3.6 ft) south of the east end of a metal guard rail.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 8729905 PUBLICATION DATE: 07/08/2011
Name: MILLVIEW, PERDIDO BAY
FL
NOAA Chart: 11378 Latitude: 30° 25.1' N ( 30.41830)
USGS Quad: PENSACOLA Longitude: 87° 21.4' W ( -87.35670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9905 G 2006
DESIGNATION: 872 9905 G
MONUMENTATION: Tidal Station disk VM#: 18626
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete abutment OPUS PID#: DP8228
LATITUDE: 30° 25.3' N ( 30.42170) LONGITUDE: 87° 21.0' W ( -87.35000)
The bench mark is a disk set in the top of the NE concrete abutment of the
Millview Bayou Bridge # 480022, 73.67 m (241.7 ft) ENE of bench mark DOT, 19.81
m (65.0 ft) south of Perdido Bay mean high water line, 7.07 m (23.2 ft) north of
the centerline of Lillian Highway, 0.09 m (.30 ft) east of the east edge of the
northern most concrete guard rail of the bridge.
BENCH MARK STAMPING: 9905 H 2006
DESIGNATION: 872 9905 H
MONUMENTATION: Tidal Station disk VM#: 18627
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete slab OPUS PID#: DP8226
LATITUDE: 30° 25.2' N ( 30.42000) LONGITUDE: 87° 21.3' W ( -87.35500)
The bench mark is a disk set in the center of the "S" turn of a concrete walkway
of the Gene and Johanna Austin residence backyard at 10024 Lillian Highway (Rt
298), 21.88 m (71.8 ft) south of the Perdido Bay mean high water line, 18.90 m
(62.0 ft) SE of the north end of the concrete walkway, 10.30 m (33.8 ft) NNE of
the NE corner of the northern most garage type building, and 0.55 m (1.80 ft) NE
of the SW edge of the concrete walkway.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 8729905 PUBLICATION DATE: 07/08/2011
Name: MILLVIEW, PERDIDO BAY
FL
NOAA Chart: 11378 Latitude: 30° 25.1' N ( 30.41830)
USGS Quad: PENSACOLA Longitude: 87° 21.4' W ( -87.35670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: DOT
ALIAS: NO STAMPING
MONUMENTATION: Tidal Station disk VM#: 18628
AGENCY: Florida Department of Transportation
(FLDT) IDB PID#:
SETTING CLASSIFICATION: Concrete guard rail of bridge OPUS PID:
LATITUDE: 30° 25.3' N ( 30.42170) LONGITUDE: 87° 21.0' W ( -87.35000)
The bench mark is a disk set in the top of a concrete guard rail on the SW end
of Millview Bayou Bridge # 480022, 31.00 m (101.7 ft) NE of a power pole, 6.95 m
(22.80) north of the centerline of Lillian Highway, 0.32 m (1.05 ft) east of the
west end of the concrete guard rail, 0.25 m (0.82 ft) above the "1972" inset
marking on the concrete, on the south side of the west end of the guard rail,
and 1.0 m (3.28 ft) above the level of the paved road.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 8729905 PUBLICATION DATE: 07/08/2011
Name: MILLVIEW, PERDIDO BAY
FL
NOAA Chart: 11378 Latitude: 30° 25.1' N ( 30.41830)
USGS Quad: PENSACOLA Longitude: 87° 21.4' W ( -87.35670)
T I D A L D A T U M S
Tidal datums at MILLVIEW, PERDIDO BAY based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: November 2006 - January 2007
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 = 0.251
MEAN HIGH WATER MHW = 0.245
MEAN TIDE LEVEL MTL = 0.121
MEAN SEA LEVEL MSL = 0.114
MEAN LOWER LOW WATER MLLW = 0.000
MEAN LOW WATER MLW = -0.002
North American Vertical Datum NAVD88 = -0.009
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
9905 B 1977 1.477 1.232
9905 C 1977 1.809 1.564
9905 F 2006 2.020 1.775
9905 G 2006 2.463 2.218
9905 H 2006 1.681 1.436
DOT 3.275 3.030
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 8729905 PUBLICATION DATE: 07/08/2011
Name: MILLVIEW, PERDIDO BAY
FL
NOAA Chart: 11378 Latitude: 30° 25.1' N ( 30.41830)
USGS Quad: PENSACOLA Longitude: 87° 21.4' W ( -87.35670)
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.