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

Bench Mark Sheet for 8446121, Provincetown MA

Superseded Epoch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Small blue map location marker Unpublished bench mark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  6

                                                                                
Station ID: 8446121                         PUBLICATION DATE:  10/26/2010
Name:       PROVINCETOWN, CAPE COD                            
            MA
NOAA Chart: 13249                           Latitude:   42°  3.0' N (  42.04959)
USGS Quad:  PROVINCETOWN                    Longitude:  70° 10.9' W ( -70.18216)


To reach the bench marks from the intersection of US highway 6 and Conwell
Street proceed SE on Conwell Street for 0.6 km (0.4 mi) to the intersection with
Bradford Street Ext, then SW on Bradford Street for 0.3 km (0.2 mi) to its
intersection with Standish Street, then SSW on Standish Street for 0.1 km (0.1
mi) to Lopes Square continue SSW across Commercial street and through Lopes
Square for 0.2 km (0.1 mi) to the base of MacMillan Wharf.  The bench marks are
along Ryder Street, near the parking lot and along the seawall.  The tide gauge
and staff were located near the end of the pier across from the harbor master's
office.


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


                 PRIMARY BENCH MARK STAMPING:  7 1933
                         DESIGNATION:          844 6121 TIDAL 7

MONUMENTATION:           Tidal Station disk                    VM#:        19587
AGENCY:                  USC&GS                                IDB PID#:        
SETTING CLASSIFICATION:  Granite footing                       OPUS PID:        
LATITUDE:   42°  3.1' N (  42.05189)          LONGITUDE:  70° 11.3' W ( -70.18794)


The primary bench mark is a disk set in granite on the northeast side of the top
step of the footing of the Bas-Relief freestanding wall monument on Bradford
Street, 88.19 m (289.3 ft) NW of 8446121 TIDAL 10, 26.97 m (88.5 ft) WNW of
light pole number 246AL, 25.76 m (84.5 ft) NNW of the edge of pavement of the
western side of Bradford St, 1.87 m (6.1 ft) NNW of front edge of bottom step of
monument, 0.16 m (0.52 ft) NE of the outside curved surface of the monument
wall.    

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  6

                                                                                
Station ID: 8446121                         PUBLICATION DATE:  10/26/2010
Name:       PROVINCETOWN, CAPE COD                            
            MA
NOAA Chart: 13249                           Latitude:   42°  3.0' N (  42.04959)
USGS Quad:  PROVINCETOWN                    Longitude:  70° 10.9' W ( -70.18216)


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


                         BENCH MARK STAMPING:   
                         DESIGNATION:          844 6121 TIDAL 10

MONUMENTATION:           Chiseled Cross                        VM#:        19588
AGENCY:                                                        IDB PID#:        
SETTING CLASSIFICATION:  Granite                               OPUS PID:        
LATITUDE:   42°  3.1' N (  42.05131)          LONGITUDE:  70° 11.2' W ( -70.18722)


The bench mark is a 1" (0.03 m) "X" chiseled into the NE corner of the lowest
step of the World War I monument in the eastern corner of the town hall lawn,
88.19 m (289.3 ft) SE of 8446121 TIDAL 7, 15.72 m (51.57 ft) NW of the NW edge
of Commercial St, 5.13 m (16.8 ft) SW of the SW edge of Ryder St, 0.09 m (0.3
ft) of NW edge of granite step, 0.35 m (1.2 ft) above grade.   



                         BENCH MARK STAMPING:  6121 A 2010
                         DESIGNATION:          844 6121 A

MONUMENTATION:           Tidal Station disk                    VM#:        19589
AGENCY:                  NOS                                   IDB PID#:        
SETTING CLASSIFICATION:  Concrete footing                      OPUS PID:        
LATITUDE:   42°  3.1' N (  42.05083)          LONGITUDE:  70° 11.2' W ( -70.18608)


The bench mark is a disk set flush in the top of the SW side of the 0.71 m x
0.71 m x 0.60 m tall(2.32 ft x 2.32 ft x 1.96 ft tall) concrete footing of a
fiberglass light pole numbered 3 in the western corner of the Macmillan Warf
parking lot, 67.67 m (222.0 ft) NNW of bench mark 8446121 B, 27.48 m (90.2 ft)
SSE of the center of the entrance to a covered bus stop, 18.93 m (62.1 ft) ENE
of power pole with light #65, 0.10 m (0.3 ft) NE of the SW edge of concrete
footing and 0.60 m (2.00 ft) above pavement.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  6

                                                                                
Station ID: 8446121                         PUBLICATION DATE:  10/26/2010
Name:       PROVINCETOWN, CAPE COD                            
            MA
NOAA Chart: 13249                           Latitude:   42°  3.0' N (  42.04959)
USGS Quad:  PROVINCETOWN                    Longitude:  70° 10.9' W ( -70.18216)


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


                         BENCH MARK STAMPING:  6121 B 2010
                         DESIGNATION:          844 6121 B

MONUMENTATION:           Survey disk                           VM#:        19590
AGENCY:                  NOS                                   IDB PID#:        
SETTING CLASSIFICATION:  Concrete Sea Wall                     OPUS PID:        
LATITUDE:   42°  3.0' N (  42.05025)          LONGITUDE:  70° 11.1' W ( -70.18558)


The bench mark is a disk set flush in the top of the sea wall forming the SW
edge of the Macmillan Warf parking lot area, 67.67 m (222.0 ft) SSE of bench
mark 8446121 A, 41.84 m (137.3 ft) SE of a stainless steel power box along Ryder
St East, 9.48 m (31.1 ft) west of the front door to #9 Ryder St East, 0.20 m
(0.7 ft) SW of NE edge of sea wall, 0.47 m (1.54 ft) above pavement.



                         BENCH MARK STAMPING:  6121 C 2010
                         DESIGNATION:          844 6121 C

MONUMENTATION:           Tidal Station disk                    VM#:        19591
AGENCY:                  NOS                                   IDB PID#:        
SETTING CLASSIFICATION:  Concrete sea wall                     OPUS PID#: BBBV11
LATITUDE:   42°  3.0' N (  42.05069)          LONGITUDE:  70° 11.1' W ( -70.18461)


The bench mark is a disk set flush in the top of the sea wall forming the SE
edge of the Macmillan Warf parking lot area, 35.78 m (117.4 ft) NE of center of
ramp down to public floating dock, 28.89 m (94.8 ft) SW of the eastern most
corner of sea wall at the base of MacMillan Warf, 4.98 m (16.3 ft) SE of edge of
pavement of SE side of parking lot, 0.15 m (0.5 ft) SE of inside edge of sea
wall, 0.32 m (1.04 ft) above boardwalk.    

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  6

                                                                                
Station ID: 8446121                         PUBLICATION DATE:  10/26/2010
Name:       PROVINCETOWN, CAPE COD                            
            MA
NOAA Chart: 13249                           Latitude:   42°  3.0' N (  42.04959)
USGS Quad:  PROVINCETOWN                    Longitude:  70° 10.9' W ( -70.18216)


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


                         BENCH MARK STAMPING:  6121 D 2010
                         DESIGNATION:          844 6121 D

MONUMENTATION:           Tidal Station disk                    VM#:        19592
AGENCY:                  NOS                                   IDB PID#:        
SETTING CLASSIFICATION:  Concrete Pier Deck                    OPUS PID:        
LATITUDE:   42°  3.0' N (  42.04964)          LONGITUDE:  70° 10.9' W ( -70.18231)


The bench mark is a disk set flush in the top of the concrete base of a large
cleat on the southeastern side of MacMillan Pier across from the Harbor Masters
Office, 62.45 m (204.9 ft) NW of the foot traffic ramp down to the Boston Ferry
floating dock, 17.08 m (56.0 ft) west of the center of the front door to the
Provincetown Harbor Master Office, 12.01 m (39.4 ft) SE of white power
transformer box along the southeastern edge of the pier, 0.33 m (1.1 ft) above
the pier deck.  

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  6

                                                                                
Station ID: 8446121                         PUBLICATION DATE:  10/26/2010
Name:       PROVINCETOWN, CAPE COD                            
            MA
NOAA Chart: 13249                           Latitude:   42°  3.0' N (  42.04959)
USGS Quad:  PROVINCETOWN                    Longitude:  70° 10.9' W ( -70.18216)


                            T I D A L   D A T U M S 


Tidal datums at PROVINCETOWN, CAPE COD based on:

     LENGTH OF SERIES:      4 MONTHS
     TIME PERIOD:           April 2010 - July 2010
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8443970 BOSTON, BOSTON HARBOR


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

     MEAN HIGHER HIGH WATER                     MHHW   =  3.072
     MEAN HIGH WATER                            MHW    =  2.933
     MEAN SEA LEVEL                             MSL    =  1.533
     MEAN TIDE LEVEL                            MTL    =  1.517
     MEAN LOW WATER                             MLW    =  0.100
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     7 1933                                      4.218    1.285
     844 6121 TIDAL 10                           4.602    1.669
     6121 A 2010                                 5.319    2.386
     6121 B 2010                                 5.203    2.270
     6121 C 2010                                 5.204    2.271
     6121 D 2010                                 5.030    2.097


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

                                                                                
Station ID: 8446121                         PUBLICATION DATE:  10/26/2010
Name:       PROVINCETOWN, CAPE COD                            
            MA
NOAA Chart: 13249                           Latitude:   42°  3.0' N (  42.04959)
USGS Quad:  PROVINCETOWN                    Longitude:  70° 10.9' W ( -70.18216)


                             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 8446121 Provincetown, MA

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