NOAA Web Site Link Tides and Currents Home Page Transparent placeholder image

Bench Mark Sheet for 8452154, Bristol Highlands 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  7

                                                                                
Station ID: 8452154                         PUBLICATION DATE:  01/14/2016
Name:       BRISTOL HIGHLANDS, NARRAGENSETT BAY               
            RI
NOAA Chart: 13224                           Latitude:   41° 41.8' N (  41.69670)
USGS Quad:  Bristol                         Longitude:  71° 17.6' W ( -71.29330)


To reach the station from the intersection of State Highways 103 and 114 in
Warren, proceed south on Route 114 for 3.7 km (2.3 mi) to the intersection with
Gibson Road.  Turn right and proceed west on Gibson Road for 1.0 km (0.6 mi) to
its termination at Shore Road.  Turn left on Shore Road and proceed 30 m (100
ft) south to the driveway to a waterfront park and pier operated by the Bristol
Highlands Improvement Association (BHIA).  The bench marks are located on the
property of the BHIA and along the right-of-way of State Highway 114 both north
and south of Gibson Road.  The tide gauge is located on the west end of the
fixed pier north of the driveway.


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


                 PRIMARY BENCH MARK STAMPING:  2154 E 1977
                         DESIGNATION:          845 2154 E 1977

MONUMENTATION:           DB                                    VM#:         2163
AGENCY:                  National Ocean Service                IDB PID#:        
SETTING CLASSIFICATION:  Massive retaining walls               OPUS PID:        
LATITUDE:   41° 41.7' N (  41.69581)          LONGITUDE:  71° 17.5' W ( -71.29239)


The bench mark is a disk set flush in top of the S end of a concrete seawall
located within the grounds of the Bristol Highlands Improvement Association
(BHIA) Park, 25 m (81 ft) SE of the centerline of the steps in the seawall which
lead to the beach, 10 m (32 ft) N of the centerline of a boat ramp at the S end
of the park, and 4.11 m (13.5 ft) SE of the junction of the NW-SE seawall and
the north-south seawall.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  7

                                                                                
Station ID: 8452154                         PUBLICATION DATE:  01/14/2016
Name:       BRISTOL HIGHLANDS, NARRAGENSETT BAY               
            RI
NOAA Chart: 13224                           Latitude:   41° 41.8' N (  41.69670)
USGS Quad:  Bristol                         Longitude:  71° 17.6' W ( -71.29330)


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


                         BENCH MARK STAMPING:  2154 A 1977
                         DESIGNATION:          845 2154 A 1977

MONUMENTATION:           DB                                    VM#:         2159
AGENCY:                  National Ocean Service                IDB PID#:        
SETTING CLASSIFICATION:  Massive retaining walls               OPUS PID:        
LATITUDE:   41° 41.8' N (  41.69619)          LONGITUDE:  71° 17.5' W ( -71.29219)


The bench mark is a disk set flush in top of the N end of a north-south concrete
seawall located within the grounds of the Bristol Highlands Improvement
Association (BHIA) Park, 35.20 m (115.5 ft) W of a 2 m (5 ft) high stone and
cement column set in the fence along the E side of the park, 23.41 m (76.8 ft)
SW of the SW corner of the park, and 19 m (61 ft) N of the centerline of the
concrete steps in the seawall, which lead to the beach.



                         BENCH MARK STAMPING:  2154 B 1977
                         DESIGNATION:          845 2154 B 1977

MONUMENTATION:           DB                                    VM#:         2160
AGENCY:                  National Ocean Service                IDB PID#:        
SETTING CLASSIFICATION:  Massive retaining walls               OPUS PID:        
LATITUDE:   41° 41.8' N (  41.69611)          LONGITUDE:  71° 17.5' W ( -71.29219)


The bench mark is a disk set flush in top of a north-south concrete seawall
located within the grounds of the Bristol Highlands Improvement Association
(BHIA) park, 37.95 m (124.5 ft) W of the centerline of the road paralleling the
shoreline on the E side of the park, 8 m (25 ft) NW of the NW corner of a cement
and wood pavilion in the center of BHIA Park, and 6 m (20 ft) north of the
centerline of the concrete steps in the seawall, which lead to the beach.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  7

                                                                                
Station ID: 8452154                         PUBLICATION DATE:  01/14/2016
Name:       BRISTOL HIGHLANDS, NARRAGENSETT BAY               
            RI
NOAA Chart: 13224                           Latitude:   41° 41.8' N (  41.69670)
USGS Quad:  Bristol                         Longitude:  71° 17.6' W ( -71.29330)


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


                         BENCH MARK STAMPING:  2154 D 1977
                         DESIGNATION:          845 2154 D 1977

MONUMENTATION:           DB                                    VM#:         2162
AGENCY:                  National Ocean Service                IDB PID#:        
SETTING CLASSIFICATION:  Massive retaining walls               OPUS PID:        
LATITUDE:   41° 41.8' N (  41.69592)          LONGITUDE:  71° 17.5' W ( -71.29233)


The bench mark is a disk located where the seawall begins to curve to the SW, 
set flush in top of a north-south concrete seawall located within the grounds of
the Bristol Highlands Improvement Association (BHIA) park, 12 m (38 ft) S of the
centerline of the steps leading to the beach, in the seawall, and 6.86 m (22.5
ft) SW of the SW corner of the pavilion in the center of the park.



                         BENCH MARK STAMPING:  2154 G 2015
                         DESIGNATION:          845 2154 G

MONUMENTATION:           F                                     VM#:        21434
AGENCY:                  National Ocean Service                IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod in sleeve         OPUS PID:        
LATITUDE:   41° 41.7' N (  41.69561)          LONGITUDE:  71° 17.5' W ( -71.29203)


The primary bench mark is a flange encased rod set 32.86 m (107.8 ft) SE of the
S corner of a wooden bench overlooking the ocean, 30.51 m (100.1 ft) SSW of a 1
ft (0.3 m) by 1 ft (0.3 m) by 3 ft (0.9 m) tall granite right-of-way marker,
16.45 m (54.0 ft) ENE of the face of a 30 inch (76 cm) diameter tree, 12.02 m
(39.4 ft) NNW of the face of a 24 inch (61 cm) diameter tree and 11.82 m (38.8
ft) W of the W post of the private beach parking only sign.  The datum point is
set 4 cm (2 inches) below the ground, being the top of a stainless steel rod
driven 3.9 m (12.8 ft) to refusal and encased in a 7-inch (18 cm) nos logo cap.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  7

                                                                                
Station ID: 8452154                         PUBLICATION DATE:  01/14/2016
Name:       BRISTOL HIGHLANDS, NARRAGENSETT BAY               
            RI
NOAA Chart: 13224                           Latitude:   41° 41.8' N (  41.69670)
USGS Quad:  Bristol                         Longitude:  71° 17.6' W ( -71.29330)


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


                         BENCH MARK STAMPING:  2154 F 2015
                         DESIGNATION:          845 2154 F

MONUMENTATION:           DB                                    VM#:        21435
AGENCY:                  National Ocean Service                IDB PID#:        
SETTING CLASSIFICATION:  In a boulder                          OPUS PID:        
LATITUDE:   41° 41.8' N (  41.69617)          LONGITUDE:  71° 17.5' W ( -71.29186)


The bench mark is a disk set in an embedded boulder 27.29 m (89.5 ft) ESE of a
post for shower head E of the seawall, 18.40 m (60.4 ft) NNW of a light pole
numbered 61 at NE corner of Gibson and shore roads, 16.49 m (54.1 ft) NE of the
NE corner of a pavilion on a concrete slab, 13.99 m (45.9 ft) N of a utility
pole numbered 61-1 and 12.72 m (41.7 ft) S of a 2.5 ft (0.8 m) by 2.5 ft (0.8 m)
by 4 ft (1.2 m) tall stone post at the N end of a 3 ft (0.9 m) wood fence.



                         BENCH MARK STAMPING:  2154 H 2015
                         DESIGNATION:          845 2154 H

MONUMENTATION:           F                                     VM#:        21436
AGENCY:                  National Ocean Service                IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod in sleeve         OPUS PID#: BBDV58
LATITUDE:   41° 41.7' N (  41.69575)          LONGITUDE:  71° 17.4' W ( -71.29081)


The bench mark is flange encased rod set on the E side of a sloping field S of
Gibson road, 54.01 m (177.2 ft) N of a power pole numbered nec01, 31.85 m (104.5
ft) NW of a flagpole with a small cannon, 21.51 m (70.6 ft) SW of the face of a
34 inch (86 cm) diameter pine tree at the SE corner of ledge street and Gibson
street, 19.10 m (62.7 ft) SSE of a power pole numbered neco31 and 5.70 m (18.7
ft) W of the centerline of ledge road.  The datum point is set 7 cm (3 inches)
below ground being the top of a stainless steel rod driven 5.4 m (17.7 ft) to
refusal and encased in a 7 inch (18 cm) NOS logo cap.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  7

                                                                                
Station ID: 8452154                         PUBLICATION DATE:  01/14/2016
Name:       BRISTOL HIGHLANDS, NARRAGENSETT BAY               
            RI
NOAA Chart: 13224                           Latitude:   41° 41.8' N (  41.69670)
USGS Quad:  Bristol                         Longitude:  71° 17.6' W ( -71.29330)


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


                         BENCH MARK STAMPING:  ELEV BM NO 441
                         DESIGNATION:          441

MONUMENTATION:           DB                                    VM#:        21437
AGENCY:                  Rhode Island Burea of Public Roads    IDB PID#:  LW0562
SETTING CLASSIFICATION:  Set into the top of a concrete monumentOPUS PID:        
LATITUDE:   41° 41.3' N (  41.68822)          LONGITUDE:  71° 16.8' W ( -71.27919)


The bench mark is a brass disk set in a 1 ft (0.3 m) by 1 ft (0.3 m) square
concrete post near the intersection with asylum road, 13.40 m (44.0 ft) S of
utility pole 140, 11.64 m (38.2 ft) N of utility pole 141, 11.55 m (37.9 ft) N
of the NE corner of the marble block corner of the wall along the sidewalk N of
asylum road, 10.48 m (34.4 ft) W of the centerline of route 114, 0.31 m (1.0 ft)
E of a 1.5 ft (0.5 m) tall and 2 ft (0.6 m) wide marble wall and set about 0.30
m (1.0 ft) higher than the ground.



                         BENCH MARK STAMPING:  ELEV BM NO 440
                         DESIGNATION:          440

MONUMENTATION:           DB                                    VM#:        21438
AGENCY:                  Rhode Island Burea of Public Roads    IDB PID#:  LW0561
SETTING CLASSIFICATION:  Set into the top of a concrete monumentOPUS PID:        
LATITUDE:   41° 42.1' N (  41.70244)          LONGITUDE:  71° 16.8' W ( -71.28000)


The bench mark is a brass disk set in a 1 ft (0.3 m) by 1 ft (0.3 m) square
concrete post 20.19 m (66.2 ft) SE of power pole 34 on the N side of beach road,
18.70 m (61.4 ft) N of utility pole 85 on the W side of route 114, 13.09 m (42.9
ft) S of utility pole 35 on the NW corner of beach road and route 114, 4.14 m
(13.6 ft) E of a stop sign on the S side of beach road, 2.39 m (7.8 ft) NW of a
fire hydrant at the SW corner of beach road at route 114 and about 0.15 m (0.5
ft) higher than the ground.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  7

                                                                                
Station ID: 8452154                         PUBLICATION DATE:  01/14/2016
Name:       BRISTOL HIGHLANDS, NARRAGENSETT BAY               
            RI
NOAA Chart: 13224                           Latitude:   41° 41.8' N (  41.69670)
USGS Quad:  Bristol                         Longitude:  71° 17.6' W ( -71.29330)


                            T I D A L   D A T U M S 


Tidal datums at BRISTOL HIGHLANDS, NARRAGENSETT BAY based on:

     LENGTH OF SERIES:      5 MONTHS
     TIME PERIOD:           April 2015 - August 2015
     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   =  1.381
     MEAN HIGH WATER                            MHW    =  1.308
     North American Vertical Datum              NAVD88 =  0.716
     MEAN TIDE LEVEL                            MTL    =  0.680
     MEAN SEA LEVEL                             MSL    =  0.634
     MEAN LOW WATER                             MLW    =  0.051
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     2154 E 1977                                 2.906    1.598
     2154 A 1977                                 2.591    1.283
     2154 B 1977                                 2.532    1.224
     2154 D 1977                                 2.303    0.995
     2154 G 2015                                 4.502    3.194
     2154 F 2015                                 6.891    5.583
     2154 H 2015                                14.505   13.197
     ELEV BM NO 441                             18.143   16.835
     ELEV BM NO 440                             35.598   34.290


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of  7

                                                                                
Station ID: 8452154                         PUBLICATION DATE:  01/14/2016
Name:       BRISTOL HIGHLANDS, NARRAGENSETT BAY               
            RI
NOAA Chart: 13224                           Latitude:   41° 41.8' N (  41.69670)
USGS Quad:  Bristol                         Longitude:  71° 17.6' W ( -71.29330)


                             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.

Return to Top
Products available at 8452154 Bristol Highlands, RI

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services