U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 4
PUBLICATION DATE: 02/11/1988
Station ID: 8727003 SUPERCEDED DATE: 04/21/2003
Name: NEW PORT RICHEY, OYSTER CREEK
FLORIDA
NOAA Chart: 11409 Latitude: 28° 15.4' N
USGS Quad: PORT RICHEY Longitude: 82° 44.1' W
To reach the tidal bench marks from the intersection of U.S. Highway 19 and
Green Key Road in New Port Richey, proceed west on Green Key Road for 0.4 mile
(0.6 km), then north on Manor Beach Road for 0.2 mile (0.3 km) to a wooden
bridge over Oyster Creek. The bench marks are located along Manor Beach Road
both north and south of Oyster Creek. The tide gage and staff were located on
the NE side of the wooden bridge.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 7003 A 1976
MONUMENTATION: Survey Disk VM#: 7706
AGENCY: PID#: AL7437
SETTING CLASSIFICATION: Copper-clad Steel Rod
The bench mark is 115 feet (35 m) SE of the SE corner of the wooden bridge over
Oyster Creek, 86 feet (26 m) SW of the intersection of Manor Beach Road and
Edgewater Drive, 12 feet (4 m) south of the centerline of Manor Beach Road, and
1.4 feet (0.4 m) NE of a palm tree. The bench mark is at ground level, crimped
to a copper-clad steel rod driven an unspecified depth to refusal, and encased
in a PVC pipe and concrete kickblock.
BENCH MARK STAMPING: 7003 B 1976
MONUMENTATION: Survey Disk VM#: 7707
AGENCY: PID#: AL7436
SETTING CLASSIFICATION: Copper-clad Steel Rod
The bench mark is 192 feet (59 m) east of Bench Mark 7003 A 1976, 105 feet (32
m) west of the centerline of Garden Drive, 12 feet (4 m) north of the centerline
of Manor Beach Road, and 0.7 foot (0.2 m) south of a witness sign nailed to
utility pole #1305. The bench mark is at ground level, crimped to 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 4
PUBLICATION DATE: 02/11/1988
Station ID: 8727003 SUPERCEDED DATE: 04/21/2003
Name: NEW PORT RICHEY, OYSTER CREEK
FLORIDA
NOAA Chart: 11409 Latitude: 28° 15.4' N
USGS Quad: PORT RICHEY Longitude: 82° 44.1' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 7003 C 1976
MONUMENTATION: Survey Disk VM#: 7708
AGENCY: PID#: AL7438
SETTING CLASSIFICATION: Copper-clad Steel Rod
The bench mark is 122 feet (37 m) WNW of the NW corner of the wooden bridge, 13
feet (4 m) south of the centerline of Manor Beach Road, and 1 foot (0.3 m) north
of a utility pole with witness sign. The bench mark is at ground level, crimped
to a copper-clad steel rod driven an unspecified depth to refusal, and encased
in a PVC pipe and concrete kickblock.
BENCH MARK STAMPING: 7003 E 1976
MONUMENTATION: Survey Disk VM#: 7709
AGENCY: PID#: AL7439
SETTING CLASSIFICATION: Copper-clad Steel Rod
The bench mark is 248 feet (76 m) NNW of Bench Mark 7003 C 1976, 19.4 feet (5.9
m) north of the centerline of Manor Beach Road, and 1.0 foot (0.3 m) south of
utility pole #1419 with witness sign. The bench mark is at ground level,
crimped to a copper-clad steel rod driven an unspecified depth to refusal, and
encased in a PVC pipe and concrete kickblock.
BENCH MARK STAMPING: 7003 F 1979
MONUMENTATION: Survey Disk VM#: 7710
AGENCY: PID#: AL7440
SETTING CLASSIFICATION: Concrete Monument
The bench mark is set in a concrete monument, 370 feet (113 m) WNW of Bench Mark
7003 E 1976, 20.1 feet (6.1 m) SSW of the centerline of Manor Beach Road, 9.7
feet (3.0 m) WNW of a 1.5-foot (0.5 m) diameter pine tree, 1.4 feet (0.4 m) SSW
of utility pole #1502 with witness sign, and at ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 4
PUBLICATION DATE: 02/11/1988
Station ID: 8727003 SUPERCEDED DATE: 04/21/2003
Name: NEW PORT RICHEY, OYSTER CREEK
FLORIDA
NOAA Chart: 11409 Latitude: 28° 15.4' N
USGS Quad: PORT RICHEY Longitude: 82° 44.1' W
T I D A L D A T U M S
Tidal datums at NEW PORT RICHEY, OYSTER CREEK based on:
LENGTH OF SERIES: 1 MONTH
TIME PERIOD: MARCH 1976
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 8727012 PITHLACHASCOTEE RIVER
Elevations of tidal datums referred to Mean High Water (MHW), in FEET:
HIGHEST OBSERVED WATER LEVEL (03/09/1976) = 0.84
MEAN HIGHER HIGH WATER MHHW = 0.27
MEAN HIGH WATER MHW = 0.00
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MHW
7003 A 1976 2.82
7003 B 1976 3.17
7003 C 1976 2.65
7003 E 1976 2.96
7003 F 1979 2.86
Foot Notes:
The datums were computed by the NOS Direct Method due to flat low waters.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 4
PUBLICATION DATE: 02/11/1988
Station ID: 8727003 SUPERCEDED DATE: 04/21/2003
Name: NEW PORT RICHEY, OYSTER CREEK
FLORIDA
NOAA Chart: 11409 Latitude: 28° 15.4' N
USGS Quad: PORT RICHEY Longitude: 82° 44.1' W
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 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.