Bench Mark Sheet for 8414888, PULPIT HARBOR, PENOBSCOT BAY ME

Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8414888                         PUBLICATION DATE:  05/21/2004
Name:       PULPIT HARBOR, PENOBSCOT BAY                      
            ME
NOAA Chart: 13302                           Latitude:   44°  9.4' N (  44.15670)
USGS Quad:  VINALHAVEN                      Longitude:  68° 53.2' W ( -68.88670)


To reach the tidal bench marks by boat, travel to the northern shore of North
Haven Island to Pulpit Harbor.  Proceed into Pulpit Harbor to the small inlet on
the north shore of Pulpit Harbor.  The bench marks are located on the east shore
of the small inlet 0.5 km (0.3 mi) ESE of Pulpit Rock.


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


                 PRIMARY BENCH MARK STAMPING:  NO 5 1944
                         DESIGNATION:          841 4888 TIDAL 5

MONUMENTATION:           Tidal Station disk                    VM#:         1862
AGENCY:                  US Coast & Geodetic Survey
                         (USC&GS)                                 IDB PID#:        
SETTING CLASSIFICATION:  Rock outcrop                          OPUS PID:        
LATITUDE:   44°  9.4' N (  44.15670)          LONGITUDE:  68° 53.2' W ( -68.88670)


The primary bench mark is a disk set on the higher and northerly one of two
fairly prominent rock outcrops in the field, 6.1 m (20 ft) west of a narrow dirt
road leading north from the gage site toward a house on the hill.



                         BENCH MARK STAMPING:  NO 6 1944
                         DESIGNATION:          841 4888 TIDAL 6

MONUMENTATION:           Tidal Station disk                    VM#:         1863
AGENCY:                  US Coast & Geodetic Survey
                         (USC&GS)                                 IDB PID#:        
SETTING CLASSIFICATION:  Rock ledge                            OPUS PID:        
LATITUDE:   44°  9.4' N (  44.15670)          LONGITUDE:  68° 53.2' W ( -68.88670)


The bench mark is a disk set in a crevice in an only rock ledge outcrop on the
western entrance point of the most westerly small inlet on the north shore of
Pulpit Harbor, 60 m (200 ft) SW of bench mark NO 5 1944, 12 m (40 ft) north of
the shoreline.

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

                                                                                
Station ID: 8414888                         PUBLICATION DATE:  05/21/2004
Name:       PULPIT HARBOR, PENOBSCOT BAY                      
            ME
NOAA Chart: 13302                           Latitude:   44°  9.4' N (  44.15670)
USGS Quad:  VINALHAVEN                      Longitude:  68° 53.2' W ( -68.88670)


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


                         BENCH MARK STAMPING:  NO 7 1944
                         DESIGNATION:          841 4888 TIDAL 7

MONUMENTATION:           Tidal Station disk                    VM#:         1864
AGENCY:                  US Coast & Geodetic Survey
                         (USC&GS)                                 IDB PID#:        
SETTING CLASSIFICATION:  Rock ledge                            OPUS PID:        
LATITUDE:   44°  9.4' N (  44.15670)          LONGITUDE:  68° 53.2' W ( -68.88670)


The bench mark is a disk set in a rock ledge outcrop on the east shore of the
most westerly small inlet on the north shore of Pulpit Harbor, 49 m (160 ft)
south of the east end of the small bridge on the second ledge south of the
bridge.



                         BENCH MARK STAMPING:  NO 8 1946
                         DESIGNATION:          841 4888 TIDAL 8

MONUMENTATION:           Tidal Station disk                    VM#:         1865
AGENCY:                  US Coast & Geodetic Survey
                         (USC&GS)                                 IDB PID#:        
SETTING CLASSIFICATION:  Rock outcrop                          OPUS PID:        
LATITUDE:   44°  9.4' N (  44.15670)          LONGITUDE:  68° 53.2' W ( -68.88670)


The bench mark is a disk set in a rock ledge outcrop, 12 m (40 ft) SE of bench
mark NO 6 1944, 1 m (3 ft) above the shore line.

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

                                                                                
Station ID: 8414888                         PUBLICATION DATE:  05/21/2004
Name:       PULPIT HARBOR, PENOBSCOT BAY                      
            ME
NOAA Chart: 13302                           Latitude:   44°  9.4' N (  44.15670)
USGS Quad:  VINALHAVEN                      Longitude:  68° 53.2' W ( -68.88670)


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


                         BENCH MARK STAMPING:  4888 E 1983
                         DESIGNATION:          841 4888 E TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         1866
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Rock outcrop                          OPUS PID:        
LATITUDE:   44°  9.4' N (  44.15670)          LONGITUDE:  68° 53.2' W ( -68.88670)


The bench mark is a disk set in a rock outcrop, 55.7 m (182.8 ft) NE of bench
mark NO 6 1944, 31.5 m (103.2 ft) west of bench mark NO 5 1944, and 19.4 m (63.8
ft) east of the east side of a red barn.

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

                                                                                
Station ID: 8414888                         PUBLICATION DATE:  05/21/2004
Name:       PULPIT HARBOR, PENOBSCOT BAY                      
            ME
NOAA Chart: 13302                           Latitude:   44°  9.4' N (  44.15670)
USGS Quad:  VINALHAVEN                      Longitude:  68° 53.2' W ( -68.88670)


                            T I D A L   D A T U M S 


Tidal datums at PULPIT HARBOR, PENOBSCOT BAY based on:

     LENGTH OF SERIES:      2 MONTHS
     TIME PERIOD:           July 1983 - August 1983
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8418150 PORTLAND, CASCO BAY


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

     MEAN HIGHER HIGH WATER                     MHHW   =  3.245
     MEAN HIGH WATER                            MHW    =  3.114
     MEAN SEA LEVEL                             MSL    =  1.636
     MEAN TIDE LEVEL                            MTL    =  1.614
     MEAN LOW WATER                             MLW    =  0.113
     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 5 1944                                   9.730    6.616
     NO 6 1944                                   7.050    3.936
     NO 7 1944                                   3.990    0.876
     NO 8 1946                                   4.182    1.068
     4888 E 1983                                10.025    6.911


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

                                                                                
Station ID: 8414888                         PUBLICATION DATE:  05/21/2004
Name:       PULPIT HARBOR, PENOBSCOT BAY                      
            ME
NOAA Chart: 13302                           Latitude:   44°  9.4' N (  44.15670)
USGS Quad:  VINALHAVEN                      Longitude:  68° 53.2' W ( -68.88670)


                             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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