U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 8
Station ID: 8410140 PUBLICATION DATE: 04/21/2003
Name: EASTPORT, PASSAMAQUODDY BAY
ME
NOAA Chart: 13328 Latitude: 44° 54.2' N ( 44.90330)
USGS Quad: EASTPORT Longitude: 66° 59.1' W ( -66.98500)
To reach the tidal bench marks from the intersection of U.S. Highway 1 and State
Highway 190 proceed south on State Route 190 to downtown Eastport. From the
post office proceed south along Water Street to the Municipal Pier. The bench
marks are within 1.6 km (1 mi) radius of the tide station. The tide station is
located at the east end of the pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 3 1918
DESIGNATION: 841 0140 TIDAL 3
MONUMENTATION: Tidal Station disk VM#: 143
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: PD0006
SETTING CLASSIFICATION: Stone steps OPUS PID:
LATITUDE: 44° 54.3' N ( 44.90425) LONGITUDE: 66° 59.1' W ( -66.98503)
The primary bench mark is a disk set in the steps leading to the Peavey Library,
located in downtown Eastport at the NW corner of the intersection of Key and
Water Streets, 15.54 m (51.0 ft) north of the NE curb of Key Street, 6.85 m
(22.5 ft) west of the west curb of Water Street, and 0.76 m (2.5 ft) above the
sidewalk.
BENCH MARK STAMPING: MAINE 40 1907
DESIGNATION: 40 USGS
MONUMENTATION: Bench Mark disk VM#: 141
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: PD0003
SETTING CLASSIFICATION: Granite belting course OPUS PID:
LATITUDE: 44° 54.3' N ( 44.90583) LONGITUDE: 66° 58.1' W ( -66.96842)
The bench mark is a disk set vertically in the west face of the SW corner of
granite belting course of the U.S. Post Office Building, 10.20 m (33.5 ft) ESE
of the flagpole on the Post Office property, 8.05 m (26.5 ft) south of the south
face of the loading ramp on the west side of the Post Office, 4.36 m (14.3 ft)
NNW of the NW corner of the Post Office Building, and 0.98 m (3.2 ft) above the
level of the surrounding pavement.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 8
Station ID: 8410140 PUBLICATION DATE: 04/21/2003
Name: EASTPORT, PASSAMAQUODDY BAY
ME
NOAA Chart: 13328 Latitude: 44° 54.2' N ( 44.90330)
USGS Quad: EASTPORT Longitude: 66° 59.1' W ( -66.98500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 2 1918
DESIGNATION: 841 0140 TIDAL 2
MONUMENTATION: Tidal Station disk VM#: 142
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: PD0005
SETTING CLASSIFICATION: Granite step support OPUS PID:
LATITUDE: 44° 54.2' N ( 44.90375) LONGITUDE: 66° 59.1' W ( -66.98506)
The bench mark is a disk set in the top of the granite step support of the steps
leading to Fleet Bank, located at the corner of Water Street and Bank Square,
21.43 m (70.3 ft) SW of the SE corner of the Masonic Lodge Cornerstone of the
Mason Building, 9.20 m (30.2 ft) NW of the centerline of Water Street, and 0.82
m (2.7 ft) above the concrete pavement.
BENCH MARK STAMPING: NO 4 1930
DESIGNATION: 841 0140 TIDAL 4
MONUMENTATION: Tidal Station disk VM#: 144
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: PD0007
SETTING CLASSIFICATION: Bedrock OPUS PID:
LATITUDE: 44° 54.2' N ( 44.90389) LONGITUDE: 66° 59.1' W ( -66.98567)
The bench mark is a disk set in bedrock located behind the Peavey Library, 26.49
m (86.9 ft) NE of the SE corner of the residence at 7 Key Street, 24.08 m (79.0
ft) west of the NW corner of the library, 11.83 m (38.8 ft) WSW of the junction
of the west and SW faces of a public gazebo, and 0.09 m (0.3 ft) below ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 8
Station ID: 8410140 PUBLICATION DATE: 04/21/2003
Name: EASTPORT, PASSAMAQUODDY BAY
ME
NOAA Chart: 13328 Latitude: 44° 54.2' N ( 44.90330)
USGS Quad: EASTPORT Longitude: 66° 59.1' W ( -66.98500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 8 1975
DESIGNATION: 841 0140 TIDAL 8
MONUMENTATION: Tidal Station disk VM#: 145
AGENCY: National Ocean Survey (NOS) IDB PID#: PD0520
SETTING CLASSIFICATION: Granite curb OPUS PID:
LATITUDE: 44° 54.4' N ( 44.90611) LONGITUDE: 66° 59.1' W ( -66.98536)
The bench mark is a disk set in a granite curb, located at the NE corner of the
U.S. Post Office Building on Water Street, 20.88 m (68.5 ft) north of the SE
corner of the Post Office, 8.96 m (29.4 ft) west of the centerline of Water
Street, 1.52 m (5.0 ft) ENE of the NE corner of the Post Office, and 0.15 m (0.5
ft) above the sidewalk.
BENCH MARK STAMPING: NO 9 1975
DESIGNATION: 841 0140 TIDAL 9
MONUMENTATION: Tidal Station disk VM#: 146
AGENCY: National Ocean Survey (NOS) IDB PID#: PD0526
SETTING CLASSIFICATION: Concrete step OPUS PID:
LATITUDE: 44° 54.3' N ( 44.90447) LONGITUDE: 66° 59.1' W ( -66.98417)
The bench mark is a disk set in the bottom concrete step leading to the WA-CO
Diner on Water Street, 21.9 m (72 ft) NE of the north side of the Source Bangor
Savings Bank (formerly the Eastport Savings Bank), 11.58 m (38.0 ft) east of the
centerline of Water Street, 11.28 m (37.0 ft) south of the Arts and Crafts
Center, and 0.12 m (0.4 ft) above ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 8
Station ID: 8410140 PUBLICATION DATE: 04/21/2003
Name: EASTPORT, PASSAMAQUODDY BAY
ME
NOAA Chart: 13328 Latitude: 44° 54.2' N ( 44.90330)
USGS Quad: EASTPORT Longitude: 66° 59.1' W ( -66.98500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 10 1975
DESIGNATION: 841 0140 TIDAL 10
MONUMENTATION: Tidal Station disk VM#: 147
AGENCY: National Ocean Survey (NOS) IDB PID#: PD0527
SETTING CLASSIFICATION: Concrete step OPUS PID:
LATITUDE: 44° 54.2' N ( 44.90375) LONGITUDE: 66° 59.1' W ( -66.98506)
The bench mark is a disk set in the first concrete step of the Source Bangor
Savings Bank (formerly the Eastport Savings Bank) on the side facing Water
Street, 22.34 m (73.3 ft) SE of the SE corner of the Masonic Lodge Cornerstone,
12.19 m (40.0 ft) SSW of the NW corner of the bank, 7.41 m (24.3 ft) east of the
centerline of Water Street, and 0.21 m (0.7 ft) above the sidewalk.
BENCH MARK STAMPING: 0140 K 1976
DESIGNATION: 841 0140 K TIDAL
MONUMENTATION: Tidal Station disk VM#: 148
AGENCY: National Ocean Survey (NOS) IDB PID#: PD0524
SETTING CLASSIFICATION: Granite step OPUS PID:
LATITUDE: 44° 54.3' N ( 44.90583) LONGITUDE: 66° 59.1' W ( -66.98442)
The bench mark is a disk set in the granite step to the building at 101 Water
Street, 12.13 m (39.8 ft) east of power pole numbered 18, 6.19 m (20.3 ft) east
of the centerline of Water Street, 3.81 m (12.5 ft) north of the SW corner of
the building, 2.26 m (7.4 ft) south of the NW corner of the building, and 0.15 m
(0.5 ft) above the sidewalk.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 8
Station ID: 8410140 PUBLICATION DATE: 04/21/2003
Name: EASTPORT, PASSAMAQUODDY BAY
ME
NOAA Chart: 13328 Latitude: 44° 54.2' N ( 44.90330)
USGS Quad: EASTPORT Longitude: 66° 59.1' W ( -66.98500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0140 L 1990
DESIGNATION: 841 0140 L
MONUMENTATION: Tidal Station disk VM#: 151
AGENCY: National Ocean Service (NOS) IDB PID#: AI8357
SETTING CLASSIFICATION: Concrete retaining wall OPUS PID:
LATITUDE: 44° 54.3' N ( 44.90422) LONGITUDE: 66° 59.1' W ( -66.98500)
The bench mark is a disk set in a concrete retaining wall on the north side of
the inshore end of the City Pier, 9.63 m (31.6 ft) NE of a cast iron lamp pole,
3.35 m (11.0 ft) north of the centerline of the pavement leading to the tide
house, and 0.15 m (0.5 ft) south of the north face of the northernmost abutment
at the west end of the pier.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 8
Station ID: 8410140 PUBLICATION DATE: 04/21/2003
Name: EASTPORT, PASSAMAQUODDY BAY
ME
NOAA Chart: 13328 Latitude: 44° 54.2' N ( 44.90330)
USGS Quad: EASTPORT Longitude: 66° 59.1' W ( -66.98500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: EASTPORT 1989
DESIGNATION: EASTPORT
MONUMENTATION: Horizontal Station disk VM#: 152
AGENCY: National Geodetic Survey (NGS) IDB PID#: PD1179
SETTING CLASSIFICATION: Pier abutment OPUS PID#: PD1179
LATITUDE: 44° 54.3' N ( 44.90456) LONGITUDE: 66° 59.0' W ( -66.98356)
The bench mark is a disk set in the south side of the inshore end of the City
Pier, 37.34 m (122.5 ft) east of the inshore end of the pier, 7.99 m (26.2 ft)
SW of an iron boat ballard, 7.95 m (26.1 ft) south of the concrete pier cap on
the north side of the pier, 3.90 m (12.8 ft) NW of the first light pole from the
inshore end of the pier, and 0.91 m (3.0 ft) east of the metal edge of the west
rim of a 21 inch diameter manhole cover.
BENCH MARK STAMPING: 8519208
DESIGNATION: 851 9208
MONUMENTATION: Tidal Station disk VM#: 6448
AGENCY: National Ocean Survey (NOS) IDB PID#: PD1174
SETTING CLASSIFICATION: Concrete pier OPUS PID:
LATITUDE: 44° 54.3' N ( 44.90478) LONGITUDE: 66° 59.0' W ( -66.98275)
The bench mark is located at the east end of the City Pier, 8.41 m (27.6 ft) NE
of the NE corner of the NOAA tide station, 0.91 m (3.0 ft) west of the end of
the pier, and 0.80 m (2.6 ft) NW of a metal ladder leading to the water. *Note*
fishing net may be on end of pier, call in advance.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 8
Station ID: 8410140 PUBLICATION DATE: 04/21/2003
Name: EASTPORT, PASSAMAQUODDY BAY
ME
NOAA Chart: 13328 Latitude: 44° 54.2' N ( 44.90330)
USGS Quad: EASTPORT Longitude: 66° 59.1' W ( -66.98500)
T I D A L D A T U M S
Tidal datums at EASTPORT, PASSAMAQUODDY BAY based on:
LENGTH OF SERIES: 19 Years
TIME PERIOD: January 1983 - December 2001
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION:
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (01/10/1997) = 7.383
MEAN HIGHER HIGH WATER MHHW = 5.874
MEAN HIGH WATER MHW = 5.729
North American Vertical Datum NAVD88 = 3.029
MEAN SEA LEVEL MSL = 2.958
MEAN TIDE LEVEL MTL = 2.932
MEAN LOW WATER MLW = 0.136
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (08/09/1972) = -1.426
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
NO 3 1918 14.223 8.494
MAINE 40 1907 15.199 9.470
NO 2 1918 10.779 5.050
NO 4 1930 15.139 9.409
NO 8 1975 11.791 6.062
NO 9 1975 7.974 2.245
NO 10 1975 9.732 4.003
0140 K 1976 12.114 6.385
0140 L 1990 7.975 2.245
EASTPORT 1989 7.855 2.126
8519208 7.961 2.231
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 8
Station ID: 8410140 PUBLICATION DATE: 04/21/2003
Name: EASTPORT, PASSAMAQUODDY BAY
ME
NOAA Chart: 13328 Latitude: 44° 54.2' N ( 44.90330)
USGS Quad: EASTPORT Longitude: 66° 59.1' W ( -66.98500)
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.