Bench Mark Sheet for 8450898, SAKONNET RIVER, NORTH END, BAY OIL PIER RI

Superseded Epoch

Large map location marker Station Location
Small red map location marker Published bench mark
Small blue map location marker Unpublished bench mark

Bench mark positions only appear on the map if their coordinates in the CO-OPS database are at the precision of degrees/minutes/seconds/and tenths of seconds. If the coordinates are less precise, the mark will not appear.

Printable version

                          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.

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Products available at 8450898 SAKONNET RIVER, NORTH END, BAY OIL PIER, RI