U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8450898 PUBLICATION DATE: 05/20/2004
Name: BAY OIL CORPORATION
RI
NOAA Chart: 13221 Latitude: 41° 39.1' N ( 41.65170)
USGS Quad: FALL RIVER Longitude: 71° 12.6' W ( -71.21000)
To reach the tidal bench marks from downtown Tiverton, Rhode Island, proceed
north on State Route 138 to the Northeast Petroleum Terminal at 995 Main Road.
The bench marks are located in the vicinity of the Pacific and Main Piers. The
tide gage and staff were located midway on the SW side of the Pacific Pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 1 1931
DESIGNATION: 845 0898 TIDAL 1
MONUMENTATION: Tidal Station disk VM#: 2123
AGENCY: US Coast & Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: Railroad bridge abutment OPUS PID:
LATITUDE: 41° 39.1' N ( 41.65170) LONGITUDE: 71° 12.6' W ( -71.21000)
The primary bench mark is a disk set flush in the west side of the south
abutment of the New York, New Haven and Hartford Railroad concrete and stone
bridge over Carey Lane at Bay Oil Corporation Storage Terminal in Tiverton, 2 m
(8 ft) west of the centerline of the railroad tracks, and 0.46 m (1.5 ft) below
the level of the tracks.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8450898 PUBLICATION DATE: 05/20/2004
Name: BAY OIL CORPORATION
RI
NOAA Chart: 13221 Latitude: 41° 39.1' N ( 41.65170)
USGS Quad: FALL RIVER Longitude: 71° 12.6' W ( -71.21000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0898 B 1977
DESIGNATION: 845 0898 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 2124
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Stilling well OPUS PID:
LATITUDE: 41° 39.1' N ( 41.65170) LONGITUDE: 71° 12.6' W ( -71.21000)
The bench mark is a disk set flush in top of the stilling well which is adjacent
to the concrete block pump house located at the foot of the Main Pier, 45 m (148
ft) NNW (350 magnetic) of bench mark N0 1 1931, 9 m (30 ft) ENE (70 magnetic)
from the NE corner of the pump house, and bears SSE (150 magnetic) from the
control house on Pacific Pier and SE (130 magnetic) from the control house on
Main Pier.
BENCH MARK STAMPING: 0898 C 1977
DESIGNATION: 845 0898 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 2125
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Steel rod OPUS PID:
LATITUDE: 41° 39.1' N ( 41.65170) LONGITUDE: 71° 12.6' W ( -71.21000)
The bench mark is a disk located between Pacific and Main Piers, 98 m (320 ft)
north (6 magnetic) of bench mark 0898 D 1977, and bears NNE (18 magnetic) from
the concrete block pump house at the foot of Main Pier and ENE (70 magnetic)
from the control house on the Main Pier. The bench mark is set 0.40 m (1.3 ft)
above ground level crimped to the top of a steel rod driven 7.4 m (24.4 ft) to
refusal and encased in a 4-inch PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8450898 PUBLICATION DATE: 05/20/2004
Name: BAY OIL CORPORATION
RI
NOAA Chart: 13221 Latitude: 41° 39.1' N ( 41.65170)
USGS Quad: FALL RIVER Longitude: 71° 12.6' W ( -71.21000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0898 D 1977
DESIGNATION: 845 0898 D TIDAL
MONUMENTATION: Tidal Station disk VM#: 2126
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Steel rod OPUS PID:
LATITUDE: 41° 39.1' N ( 41.65170) LONGITUDE: 71° 12.6' W ( -71.21000)
The bench mark is a disk located between Pacific and Main Piers, 46 m (150 ft)
north (10 magnetic) of the NE corner of the concrete block pump house at the
foot of Main Pier, 34 m (110 ft) north (6 magnetic) of bench mark 0898 B 1977,
and bears east (95 magnetic) of the control house on Main Pier, and SSE (160
magnetic) from the control house on Pacific Pier. The bench mark is set 0.46 m
(1.5 ft) above ground level crimped to the top of a steel rod driven 5.1 m (16.8
ft) to refusal encased in a 4-inch PVC pipe and concrete kickblock.
BENCH MARK STAMPING: 0898 E 1977
DESIGNATION: 845 0898 E TIDAL
MONUMENTATION: Tidal Station disk VM#: 2127
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Steel rod OPUS PID:
LATITUDE: 41° 39.1' N ( 41.65170) LONGITUDE: 71° 12.6' W ( -71.21000)
The bench mark is a disk located west on Pacific Pier, 128 m (420 ft) NNW (340
magnetic) of bench mark 0898 C 1977, 3 m (10 ft) SW of the centerline of Pacific
Wharf, and bears ESE (98 magnetic) from the control house on Pacific Pier, NE
(40 magnetic) of the control house on Main Pier and north (352 magnetic) of
the concrete block pump house at the foot of Main Pier. The bench mark is set
0.37 m (1.2 ft) above ground level crimped to the top of a steel rod driven 13.7
m (45 ft) to refusal encased in a 4-inch PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8450898 PUBLICATION DATE: 05/20/2004
Name: BAY OIL CORPORATION
RI
NOAA Chart: 13221 Latitude: 41° 39.1' N ( 41.65170)
USGS Quad: FALL RIVER Longitude: 71° 12.6' W ( -71.21000)
T I D A L D A T U M S
Tidal datums at BAY OIL CORPORATION based on:
LENGTH OF SERIES: 1 MONTH
TIME PERIOD: October 1977
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8452660 NEWPORT, NARRAGANSETT BAY
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 1.394
MEAN HIGH WATER MHW = 1.316
MEAN TIDE LEVEL MTL = 0.681
MEAN SEA LEVEL MSL = 0.639
MEAN LOW WATER MLW = 0.046
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
NO 1 1931 10.052 8.736
0898 B 1977 5.365 4.049
0898 C 1977 2.223 0.907
0898 D 1977 2.318 1.002
0898 E 1977 2.188 0.872
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8450898 PUBLICATION DATE: 05/20/2004
Name: BAY OIL CORPORATION
RI
NOAA Chart: 13221 Latitude: 41° 39.1' N ( 41.65170)
USGS Quad: FALL RIVER Longitude: 71° 12.6' W ( -71.21000)
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.