Bench Mark Sheet for 8453767, PAWTUXET COVE, PROVIDENCE RIVER 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8453767                         PUBLICATION DATE:  04/21/2003
Name:       PAWTUXET COVE, PROVIDENCE RIVER                   
            RI
NOAA Chart: 13224                           Latitude:   41° 45.7' N (  41.76170)
USGS Quad:  PROVIDENCE                      Longitude:  71° 23.3' W ( -71.38830)


To reach the tidal bench marks from I-95 exit 14 - Route 37, take exit 14 and
proceed east on Route 37 for 1.4 km (0.9 mi) to Post Road (Route 1), continue
north on Post Road for 1.3 km (0.8 mi) to Route 1 Alternate.  Proceed north on
Route 1 Alternate for 2.7 km (1.7 mi) to Broad Street, take a right turn onto
Broad Street and continue for 0.2 km (0.1 mi) to Remington Street.  Make a left
turn onto Remington Street and proceed to the end of the road.  The bench marks
are located at the Broad Street bridge over the Pawtuxet River, in the Pavilion
located in the park between Remington Street and the bridge, at the Asprey Boat
House, and at the end of Remington Street.  The tide gage and staff were located
on the south side of the private dock located at 6 Remington Street.


                         T I D A L   B E N C H   M A R K S


                 PRIMARY BENCH MARK STAMPING:  3767 A 1994
                         DESIGNATION:          845 3767 A

MONUMENTATION:           Tidal Station disk                    VM#:        12882
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete storm drain culvert          OPUS PID:        
LATITUDE:   41° 45.7' N (  41.76170)          LONGITUDE:  71° 23.3' W ( -71.38830)


The primary bench mark is a disk set on a concrete storm drain culvert at the
east end of Remington Street, 17.31 m (56.8 ft) NW of the SE corner of the
seawall, 10.79 m (35.4 ft) north of the NE corner of  the porch of the house at
6 Remington Street, 2.41 m (7.9 ft) east of the west end of a stone wall, and 1
m (3 ft) below the road.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  5

                                                                                
Station ID: 8453767                         PUBLICATION DATE:  04/21/2003
Name:       PAWTUXET COVE, PROVIDENCE RIVER                   
            RI
NOAA Chart: 13224                           Latitude:   41° 45.7' N (  41.76170)
USGS Quad:  PROVIDENCE                      Longitude:  71° 23.3' W ( -71.38830)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  3767 B 1994
                         DESIGNATION:          845 3767 B

MONUMENTATION:           Tidal Station disk                    VM#:        12883
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete sea wall                     OPUS PID:        
LATITUDE:   41° 45.7' N (  41.76170)          LONGITUDE:  71° 23.3' W ( -71.38830)


The bench mark is a disk set on the concrete seawall of the Asprey Boat House,
21.00 m (68.9 ft) south of the flag pole, 9.20 m (30.2 ft) SE of the SE corner
of the boat house, and 2.19 m (7.2 ft) WNW of the SE corner of the seawall.



                         BENCH MARK STAMPING:  3767 C 1994
                         DESIGNATION:          845 3767 C

MONUMENTATION:           Tidal Station disk                    VM#:        12884
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete foundation for gazebo        OPUS PID:        
LATITUDE:   41° 45.8' N (  41.76330)          LONGITUDE:  71° 23.4' W ( -71.39000)


The bench mark is a disk set in the east side of the concrete foundation for a
gazebo located in the SE area of Pawtuxet Park along the south side of Broad
Street, 47.09 m (154.5 ft) ESE of the south side of Broad Street, 34.99 m (114.8
ft) north of the centerline of the drive leading to the Asprey boat house, 0.09
m (0.3 ft) west of the east side of the gazebo foundation, and level with
ground.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  5

                                                                                
Station ID: 8453767                         PUBLICATION DATE:  04/21/2003
Name:       PAWTUXET COVE, PROVIDENCE RIVER                   
            RI
NOAA Chart: 13224                           Latitude:   41° 45.7' N (  41.76170)
USGS Quad:  PROVIDENCE                      Longitude:  71° 23.3' W ( -71.38830)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  3767 D 1994
                         DESIGNATION:          845 3767 D

MONUMENTATION:           Tidal Station disk                    VM#:        12885
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete sidewalk                     OPUS PID:        
LATITUDE:   41° 45.8' N (  41.76330)          LONGITUDE:  71° 23.4' W ( -71.39000)


The bench mark is a disk set in the concrete sidewalk at the SW end of the
Pawtuxet Bridge on Broad Street (Route 1A), 26.40 m (86.6 ft) north of the flag
pole, 11.49 m (37.7 ft) WNW of the centerline of Broad Street, and 0.24 m (0.8
ft) ESE of the wall of the bridge.



                         BENCH MARK STAMPING:  3767 E 1994
                         DESIGNATION:          845 3767 E

MONUMENTATION:           Tidal Station disk                    VM#:        12886
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete sidewalk                     OPUS PID:        
LATITUDE:   41° 45.9' N (  41.76500)          LONGITUDE:  71° 23.4' W ( -71.39000)


The bench mark is a disk set at the NW end of the Pawtuxet Bridge on Broad
Street (Route 1A), 8.99 m (29.5 ft) west of the centerline of Broad Street, 3.20
m (10.5 ft) SW of power pole number 442, and 0.21 m (0.7 ft) east of the wall of
the bridge.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  5

                                                                                
Station ID: 8453767                         PUBLICATION DATE:  04/21/2003
Name:       PAWTUXET COVE, PROVIDENCE RIVER                   
            RI
NOAA Chart: 13224                           Latitude:   41° 45.7' N (  41.76170)
USGS Quad:  PROVIDENCE                      Longitude:  71° 23.3' W ( -71.38830)


                            T I D A L   D A T U M S 


Tidal datums at PAWTUXET COVE, PROVIDENCE RIVER based on:

     LENGTH OF SERIES:      4 Months
     TIME PERIOD:           June 1994 - September 1994
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8454000 PROVIDENCE, PROVIDENCE RIVER


Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:

     MEAN HIGHER HIGH WATER                     MHHW   =  1.456
     MEAN HIGH WATER                            MHW    =  1.380
     MEAN TIDE LEVEL                            MTL    =  0.717
     MEAN SEA LEVEL                             MSL    =  0.670
     MEAN LOW WATER                             MLW    =  0.054
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     3767 A 1994                                 2.295    0.915
     3767 B 1994                                 2.233    0.853
     3767 C 1994                                 5.540    4.160
     3767 D 1994                                 6.698    5.318
     3767 E 1994                                 6.749    5.369


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  5

                                                                                
Station ID: 8453767                         PUBLICATION DATE:  04/21/2003
Name:       PAWTUXET COVE, PROVIDENCE RIVER                   
            RI
NOAA Chart: 13224                           Latitude:   41° 45.7' N (  41.76170)
USGS Quad:  PROVIDENCE                      Longitude:  71° 23.3' W ( -71.38830)


                             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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