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Bench Mark Sheet for 8447191, Bournedale, Cape Cod Canal (Sta. 200) 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  5

                                                                                
Station ID: 8447191                         PUBLICATION DATE:  04/21/2003
Name:       STATION 200, CAPE COD CANAL                       
            MA
NOAA Chart: 13236                           Latitude:   41° 46.2' N (  41.77000)
USGS Quad:  SAGAMORE                        Longitude:  70° 33.7' W ( -70.56170)


To reach the tidal bench marks from the point on the Cape Cod Canal service road
where U.S. Highway 6 (Sagamore Bridge) crosses overhead, proceed west on the
service road for 1.8 km (1.1 mi) to station 200.  The bench marks are located
between the railroad tracks and along the service road.  The tide gage is
located on a small pile structure just offshore of station 200 on the south
shore of the canal.


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


                 PRIMARY BENCH MARK STAMPING:  7191 D 1982
                         DESIGNATION:          844 7191 D

MONUMENTATION:           Tidal Station disk                    VM#:         1530
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID#: BBBJ46
LATITUDE:   41° 46.2' N (  41.77000)          LONGITUDE:  70° 33.7' W ( -70.56170)


The primary bench mark is a disk located near station 197+50, 3.02 m (9.9 ft) SW
of the centerline of the service road, and 0.52 m (1.7 ft) NE of a pole with a
white cross painted on it.  The bench mark is crimped to a stainless steel rod
driven 9.8 m (32 ft), and encased in a PVC pipe with concrete kickblock.

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

                                                                                
Station ID: 8447191                         PUBLICATION DATE:  04/21/2003
Name:       STATION 200, CAPE COD CANAL                       
            MA
NOAA Chart: 13236                           Latitude:   41° 46.2' N (  41.77000)
USGS Quad:  SAGAMORE                        Longitude:  70° 33.7' W ( -70.56170)


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


                         BENCH MARK STAMPING:  7191 E 1982
                         DESIGNATION:          844 7191 E

MONUMENTATION:           Tidal Station disk                    VM#:         1531
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   41° 46.2' N (  41.77000)          LONGITUDE:  70° 33.7' W ( -70.56170)


The bench mark is a disk located 38.16 m (125.2 ft) SW of Station 200, 3.11 m
(10.2 ft) SW of the centerline of the service road, and 0.40 m (1.3 ft) SW of a
pole with a white cross painted on it.  The bench mark is crimped to a stainless
steel rod driven 12.2 m (40 ft), and encased in a PVC pipe with concrete block.



                         BENCH MARK STAMPING:  BM 2 57 STA 200 475 SO
                         DESIGNATION:          844 7191  BM 2 57 STA 200

MONUMENTATION:           Survey disk                           VM#:         1533
AGENCY:                  US Army Corps of Engineers (USE)      IDB PID#:        
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   41° 46.2' N (  41.77000)          LONGITUDE:  70° 33.7' W ( -70.56170)


The bench mark is a disk set in a concrete monument high on a bank along the
railroad above station 200, 28.93 m (94.9 ft) west of a 0.30 m (1.0 ft) square
concrete post with "58" painted on it, 27 m (90 ft) SE of power pole No. 200,
5.33 m (17.5 ft) NW of the north rail of the tracks, and 0.09 m (0.3 ft) above
ground.

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

                                                                                
Station ID: 8447191                         PUBLICATION DATE:  04/21/2003
Name:       STATION 200, CAPE COD CANAL                       
            MA
NOAA Chart: 13236                           Latitude:   41° 46.2' N (  41.77000)
USGS Quad:  SAGAMORE                        Longitude:  70° 33.7' W ( -70.56170)


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


                         BENCH MARK STAMPING:  CC 458 1974
                         DESIGNATION:          844 7191 CC 458

MONUMENTATION:           Survey disk                           VM#:         1534
AGENCY:                  US Army Corps of Engineers (USE)      IDB PID#:        
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   41° 46.2' N (  41.77000)          LONGITUDE:  70° 33.7' W ( -70.56170)


The bench mark is a disk set in a 0.15 m (0.5 ft) square concrete monument, on a
high bank along the railroad above station 200, 18.14 m (59.5 ft) NE of Bench
Mark BM 2 57 STA 200 475 SO, 17 m (56 ft) NW of a 0.30 (1.0 ft) square concrete
post with "58" painted on it, 9 m (31 ft) north of the north rail of the Bay
Colony Railroad tracks, and 9 m (30 ft) east of pole #200.



                         BENCH MARK STAMPING:  GPS 190 95
                         DESIGNATION:          844 7191 GPS 190

MONUMENTATION:           Survey disk                           VM#:        16512
AGENCY:                  US Army Corps of Engineers (USE)      IDB PID#:        
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   41° 46.2' N (  41.77000)          LONGITUDE:  70° 33.7' W ( -70.56170)


The bench mark is a disk set in a concrete monument between the service road and
the canal bank, 12.52 m (37.8 ft) west of power pole 190, 11.40 m (37.4 ft) SW
of another power pole with light, and 2.74 m (9.0 ft) NW of the centerline of
the service road.

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

                                                                                
Station ID: 8447191                         PUBLICATION DATE:  04/21/2003
Name:       STATION 200, CAPE COD CANAL                       
            MA
NOAA Chart: 13236                           Latitude:   41° 46.2' N (  41.77000)
USGS Quad:  SAGAMORE                        Longitude:  70° 33.7' W ( -70.56170)


                            T I D A L   D A T U M S 


Tidal datums at STATION 200, CAPE COD CANAL based on:

     LENGTH OF SERIES:      3 Months
     TIME PERIOD:           July 2001 - September 2001
     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   =  2.079
     MEAN HIGH WATER                            MHW    =  1.968
     MEAN SEA LEVEL                             MSL    =  1.070
     MEAN TIDE LEVEL                            MTL    =  1.026
     MEAN LOW WATER                             MLW    =  0.083
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     7191 D 1982                                 4.809    2.841
     7191 E 1982                                 4.796    2.828
     BM 2 57 STA 200 475 SO                     16.125   14.157
     CC 458 1974                                16.619   14.651
     GPS 190 95                                  4.880    2.912


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

                                                                                
Station ID: 8447191                         PUBLICATION DATE:  04/21/2003
Name:       STATION 200, CAPE COD CANAL                       
            MA
NOAA Chart: 13236                           Latitude:   41° 46.2' N (  41.77000)
USGS Quad:  SAGAMORE                        Longitude:  70° 33.7' W ( -70.56170)


                             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 8447191 Bournedale, Cape Cod Canal (Sta. 200), MA

Revised: 08/08/2018
NOAA / National Ocean Service
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