U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
Station ID: 8729501 PUBLICATION DATE: 06/23/2011
Name: VALPARISO, BOGGY BAYOU
FL
NOAA Chart: 11388 Latitude: 30° 30.2' N ( 30.50330)
USGS Quad: NICEVILLE Longitude: 86° 29.6' W ( -86.49330)
To reach the tidal bench marks from the junction of State Highway 85 and State
Highway 397 (S John Sims Parkway) in Valparaiso, proceed south on State Highway
397 for 0.6 km (0.4 mi) to North Bayshore Drive (last left turn before Bridge
over Toms Bayou), then east on North Bayshore Drive for 0.5 km (0.3 mi) to the
Valparaiso fishing pier. The bench marks are along North Bayshore Drive, and
the tide gauge is located on the offshore end of the Valparaiso fishing pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 9501 A 1977
DESIGNATION: 872 9501 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 10126
AGENCY: National Ocean Survey (NOS) IDB PID#: BG4634
SETTING CLASSIFICATION: Concrete manhole foundation OPUS PID#: BG4634
LATITUDE: 30° 30.3' N ( 30.50437) LONGITUDE: 86° 29.6' W ( -86.49286)
The primary bench mark is a disk set flush in a concrete foundation for manhole
located NE of the junction of Bay Street and north Bayshore Drive, 16 m (52.5
ft) NE of the centerline of north Bayshore Drive, 10.10 m (33.1 ft) east of
power pole number 3724255246, 4.15 m (13.6 ft) west of the center of a plastic
holding tank, 0.73 m (2.4 ft) NE of the SW face of the manhole foundation and
0.3 m (1.0 ft) above the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
Station ID: 8729501 PUBLICATION DATE: 06/23/2011
Name: VALPARISO, BOGGY BAYOU
FL
NOAA Chart: 11388 Latitude: 30° 30.2' N ( 30.50330)
USGS Quad: NICEVILLE Longitude: 86° 29.6' W ( -86.49330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9501 B 1989
DESIGNATION: 872 9501 B
MONUMENTATION: Tidal Station disk VM#: 10127
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete step OPUS PID:
LATITUDE: 30° 30.1' N ( 30.50172) LONGITUDE: 86° 29.4' W ( -86.48936)
The bench mark is a disk set in the top west end of a concrete step located at
the shore end of the support for Valpariso City Pier, 13.12 m (43.0 ft) south of
the center of the restroom door, 6.25 m (20.5 ft) west of a light pole, and 4.80
m (15.7 ft) east of a double trunk pine tree.
BENCH MARK STAMPING: 9501 C 1989
DESIGNATION: 872 9501 C
MONUMENTATION: Tidal Station disk VM#: 10128
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete step OPUS PID:
LATITUDE: 30° 30.1' N ( 30.50186) LONGITUDE: 86° 29.4' W ( -86.48944)
The bench mark is a disk set in the east end of the bottom concrete step leading
from north Bayshore Drive to the city pier, 17.01 m (55.8 ft) north of bench
mark 872 9501 B, 9.33 m (30.6 ft) NW of the SW corner of the bathroom, and 7.95
m (26.1 ft) south of the centerline of north Bayshore Drive.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 8729501 PUBLICATION DATE: 06/23/2011
Name: VALPARISO, BOGGY BAYOU
FL
NOAA Chart: 11388 Latitude: 30° 30.2' N ( 30.50330)
USGS Quad: NICEVILLE Longitude: 86° 29.6' W ( -86.49330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO I
DESIGNATION: 872 9501 TIDAL 1
MONUMENTATION: Tidal Station disk VM#: 10129
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: BG1509
SETTING CLASSIFICATION: Concrete retaining wall OPUS PID#: BG1509
LATITUDE: 30° 30.1' N ( 30.50189) LONGITUDE: 86° 29.5' W ( -86.49089)
The bench mark is a disk set in the top of a concrete retaining wall located SSE
of the intersection of Westview Avenue and Bayshore Drive. The bench mark is
22.90 m (75.1 ft) west of the SW corner of a metal roof shed over the old
windless, 18.41 m (60.4 ft) south of the centerline of the north Bayshore Drive,
and 4.27 m (14.0 ft) NNW of the east end of the retaining wall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 8729501 PUBLICATION DATE: 06/23/2011
Name: VALPARISO, BOGGY BAYOU
FL
NOAA Chart: 11388 Latitude: 30° 30.2' N ( 30.50330)
USGS Quad: NICEVILLE Longitude: 86° 29.6' W ( -86.49330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: H 15
ALIAS: NO STAMPING 1
MONUMENTATION: Survey disk VM#: 10132
AGENCY: Florida Department of Transportation
(FLDT) IDB PID#: BG4635
SETTING CLASSIFICATION: Concrete abutment OPUS PID:
LATITUDE: 30° 30.2' N ( 30.50397) LONGITUDE: 86° 29.6' W ( -86.49392)
The bench mark is a disk set flush in the north abutment at the NE corner of the
State Road 397 bridge over Toms Bayou (bridge #H15), 32.80 m (107.6 ft) SSW of
the centerline of north Bayshore Drive, 15.93 m (52.3 ft) SSW of a manhole cover
for a storm drain, 8.95 m (29.4 ft) SW of a power pole with a meter, 4.27 m
(14.0 ft) east of the centerline of the northbound lane of the state road 397,
and flush with the sidewalk. Note: Bench mark is partially covered with
concrete cap listing the bridge's name.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
Station ID: 8729501 PUBLICATION DATE: 06/23/2011
Name: VALPARISO, BOGGY BAYOU
FL
NOAA Chart: 11388 Latitude: 30° 30.2' N ( 30.50330)
USGS Quad: NICEVILLE Longitude: 86° 29.6' W ( -86.49330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: Unstamped Mark
MONUMENTATION: Bench Mark disk VM#: 19672
AGENCY: Florida Department of Transportation
(FLDT) IDB PID#:
SETTING CLASSIFICATION: Concrete barrier OPUS PID:
LATITUDE: 30° 30.2' N ( 30.50400) LONGITUDE: 86° 29.6' W ( -86.49390)
The bench mark is a disk set flush in the top of a concrete barrier separating
state road 397 from the sidewalk on the NE end of the H-15 bridge over Toms
Bayou. The bench mark is 12.30 m (40.4 ft) SSW of a manhole cover for a storm
drain, 7.75 m (25.4 ft) west of a power pole with a meter, 4.31 m (14.1ft) NW of
bench mark H-15, and 0.71 m (2.3 ft) higher than sidewalk. Note-Florida dept.
replied that if the mark is unstamped, they most likely do not have any vertical
data for it. The mark is not suitable for static GPS sessions, but is suitable
for RTK GPS.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
Station ID: 8729501 PUBLICATION DATE: 06/23/2011
Name: VALPARISO, BOGGY BAYOU
FL
NOAA Chart: 11388 Latitude: 30° 30.2' N ( 30.50330)
USGS Quad: NICEVILLE Longitude: 86° 29.6' W ( -86.49330)
T I D A L D A T U M S
Tidal datums at VALPARISO, BOGGY BAYOU based on:
LENGTH OF SERIES: 1 YEAR
TIME PERIOD: November 2009 - October 2010
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8729840 PENSACOLA, PENSACOLA BAY
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (11/10/2009) = 0.820
MEAN HIGHER HIGH WATER MHHW = 0.166
MEAN HIGH WATER MHW = 0.165
MEAN SEA LEVEL MSL = 0.084
MEAN TIDE LEVEL MTL = 0.083
MEAN LOW WATER MLW = 0.001
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum NAVD88 = -0.027
LOWEST OBSERVED WATER LEVEL (01/13/2011) = -0.437
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
9501 A 1977 1.292 1.127
9501 B 1989 0.988 0.823
9501 C 1989 1.774 1.609
NO I 1.391 1.226
H 15 5.817 5.652
Unstamped Mark 6.764 6.599
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
Station ID: 8729501 PUBLICATION DATE: 06/23/2011
Name: VALPARISO, BOGGY BAYOU
FL
NOAA Chart: 11388 Latitude: 30° 30.2' N ( 30.50330)
USGS Quad: NICEVILLE Longitude: 86° 29.6' W ( -86.49330)
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.