U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8726988 PUBLICATION DATE: 01/06/2004
Name: FILLMANS CREEK, NEW PORT RICHEY
FL
NOAA Chart: 11409 Latitude: 28° 13.8' N ( 28.23000)
USGS Quad: TARPON SPRINGS Longitude: 82° 45.2' W ( -82.75330)
To reach the tidal bench marks from the junction of U.S. Highway ALT 19 and U.S.
Highway 19 just north of Tarpon Springs, proceed north on U.S. Highway 19 for
5.5 km (3.4 mi) to Floramar Terrace (the entrance to Gulf Harbors), then turn
left and proceed west and south on Floramar Terrace to Topsail Trail. The bench
marks are along Floramar Terrace, Topsail Trail, and Glenn Drive. The gage and
staff were at the foot of Floramar Terrace, across Topsail Trail and at the
south end of the east concrete seawall along a canal.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 6988 A 1976
DESIGNATION: 872 6988 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 7685
AGENCY: National Ocean Survey (NOS) IDB PID#: AL7458
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 28° 13.8' N ( 28.23000) LONGITUDE: 82° 45.2' W ( -82.75330)
The primary bench mark is a disk located 0.5 km (0.3 mi) south along Glenn Drive
from its junction with Topsail Drive, 187 m (615 ft) south of bench mark 6988 C
1976, 30 m (97 ft) SE of the SE corner of dwelling No 4, 11.34 m (37.2 ft) south
of a manhole cover at the center of Glenn Drive circle, 1.58 m (5.2 ft) east of
a lamp pole and 0.37 m (1.2 ft) south of the south curb of the road. The bench
mark is crimped to the top of a copper-clad steel rod driven 15.2 m (50 ft) 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 5
Station ID: 8726988 PUBLICATION DATE: 01/06/2004
Name: FILLMANS CREEK, NEW PORT RICHEY
FL
NOAA Chart: 11409 Latitude: 28° 13.8' N ( 28.23000)
USGS Quad: TARPON SPRINGS Longitude: 82° 45.2' W ( -82.75330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6988 B 1976
DESIGNATION: 872 6988 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 7686
AGENCY: National Ocean Survey (NOS) IDB PID#: AL7456
SETTING CLASSIFICATION: Concrete boat ramp OPUS PID:
LATITUDE: 28° 14.1' N ( 28.23500) LONGITUDE: 82° 45.2' W ( -82.75330)
The bench mark is a disk set in the NE corner of a concrete boat ramp, 30.48 m
(100.0 ft) south of bench mark 6988 D 1976, 20.57m (67.5 ft) NW of the NW corner
of house No. 133, and 5.79 m (19.0 ft) SSW of the centerline of Topsail Trail.
BENCH MARK STAMPING: 6988 C 1976
DESIGNATION: 872 6988 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 7687
AGENCY: National Ocean Survey (NOS) IDB PID#: AL7457
SETTING CLASSIFICATION: Concrete storm drain OPUS PID:
LATITUDE: 28° 14.0' N ( 28.23330) LONGITUDE: 82° 45.2' W ( -82.75330)
The bench mark is a disk set in the top of a concrete storm drain, 0.3 km (0.2
mi) SSW of a fire hydrant, 13.26 m (43.5 ft) SW of the SW corner of the house at
23 Glenn Drive, and 4.11 m (13.5 ft) east of the centerline of Glenn Drive.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8726988 PUBLICATION DATE: 01/06/2004
Name: FILLMANS CREEK, NEW PORT RICHEY
FL
NOAA Chart: 11409 Latitude: 28° 13.8' N ( 28.23000)
USGS Quad: TARPON SPRINGS Longitude: 82° 45.2' W ( -82.75330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6988 D 1976
DESIGNATION: 872 6988 D TIDAL
MONUMENTATION: Tidal Station disk VM#: 7688
AGENCY: National Ocean Survey (NOS) IDB PID#: AL7455
SETTING CLASSIFICATION: Concrete curb OPUS PID#: AL7455
LATITUDE: 28° 14.1' N ( 28.23500) LONGITUDE: 82° 45.2' W ( -82.75330)
The bench mark is a disk set in the top of the south concrete curb of the
parking lot south of bench mark 6988 E 1976, 18.59 m (61.0 ft) ESE of the
centerline of Floramar Terrace, 7.62 m (25.0 ft) NNW of the NE corner of house
No. 387, and 0.30 m (1.0 ft) above ground level.
BENCH MARK STAMPING: 6988 E 1976
DESIGNATION: 872 6988 E TIDAL
MONUMENTATION: Tidal Station disk VM#: 7689
AGENCY: National Ocean Survey (NOS) IDB PID#: AL7454
SETTING CLASSIFICATION: Concrete curb OPUS PID#: AL7454
LATITUDE: 28° 14.1' N ( 28.23500) LONGITUDE: 82° 45.2' W ( -82.75330)
The bench mark is a disk set in the north concrete curb of the parking lot at
the Gulf Harbor golf course, 15 m (49 ft) east of the centerline of Floramar
Terrace, 7.32 m (24.0 ft) WSW of the SW corner of house No. 377, 0.85 m (2.8 ft)
SW of a lamp pole, and 0.30 m (1.0 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8726988 PUBLICATION DATE: 01/06/2004
Name: FILLMANS CREEK, NEW PORT RICHEY
FL
NOAA Chart: 11409 Latitude: 28° 13.8' N ( 28.23000)
USGS Quad: TARPON SPRINGS Longitude: 82° 45.2' W ( -82.75330)
T I D A L D A T U M S
Tidal datums at FILLMANS CREEK, NEW PORT RICHEY based on:
LENGTH OF SERIES: 1 MONTH
TIME PERIOD: March 1976 - March 1976
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8726924 ANCLOTE RIVER
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 1.024
MEAN HIGH WATER MHW = 0.897
North American Vertical Datum NAVD88 = 0.660
MEAN SEA LEVEL MSL = 0.541
MEAN TIDE LEVEL MTL = 0.532
MEAN LOW WATER MLW = 0.167
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
6988 A 1976 2.598 1.701
6988 B 1976 1.979 1.082
6988 C 1976 1.796 0.899
6988 D 1976 2.465 1.568
6988 E 1976 2.451 1.554
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8726988 PUBLICATION DATE: 01/06/2004
Name: FILLMANS CREEK, NEW PORT RICHEY
FL
NOAA Chart: 11409 Latitude: 28° 13.8' N ( 28.23000)
USGS Quad: TARPON SPRINGS Longitude: 82° 45.2' W ( -82.75330)
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.