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Datums Page Page 1 of 8
Station ID: 8411250 PUBLICATION DATE: 06/23/2010
Name: CUTLER NAVAL BASE, MACHIAS BAY
ME
NOAA Chart: 13327 Latitude: 44° 38.5' N ( 44.64170)
USGS Quad: MACHIAS BAY Longitude: 67° 17.8' W ( -67.29670)
To reach the tidal bench marks from the junction of U.S. Highway 1 and State
Route 191 in East Machias, proceed east on State Route 191 to the main gate of
Cutler Naval Communications Center. Obtain permission and a pass to visit the
tide station from the guard at the gate. Continue east on State Route 191 for
approximately 4.8 km (3 mi) to the bay, follow the road to the right through a
gate to the fuel pier. The bench marks are located within a 1.6 km (1 mi)
radius of the station. The tide house is located on the northern end of the
pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 1250 M 1991
DESIGNATION: 841 1250 M TIDAL
MONUMENTATION: Tidal Station disk VM#: 13801
AGENCY: National Ocean Service (NOS) IDB PID#: AJ2727
SETTING CLASSIFICATION: Bedrock outcrop OPUS PID:
LATITUDE: 44° 38.5' N ( 44.64139) LONGITUDE: 67° 17.7' W ( -67.29489)
The primary bench mark is a disk set in a bedrock outcrop located on the north
side of the road leading to the fuel pier, 51.51 m (169.0 ft) WSW of the face of
the concrete fuel pumping station, 40.35 m (132.4 ft) east of the NE corner of
Building number 121, 21.94 m (72.0 ft) NNE of the centerline of the road leading
to the fuel pier, and 0.18 m (0.6 ft) above ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 8
Station ID: 8411250 PUBLICATION DATE: 06/23/2010
Name: CUTLER NAVAL BASE, MACHIAS BAY
ME
NOAA Chart: 13327 Latitude: 44° 38.5' N ( 44.64170)
USGS Quad: MACHIAS BAY Longitude: 67° 17.8' W ( -67.29670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 1250 A 1978
DESIGNATION: 841 1250 A
MONUMENTATION: Tidal Station disk VM#: 153
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete bollard foundation OPUS PID:
LATITUDE: 44° 38.5' N ( 44.64136) LONGITUDE: 67° 17.8' W ( -67.29717)
The bench mark is a disk set in the concrete foundation for the bollard located
at the NW corner of the fuel pier, 5.46 m (17.9 ft) west of the entrance to the
seawater pump house, 4.39 m (14.4 ft) SW of the west side of the catwalk leading
to the northern octagon shaped pier, and 0.61 m (2.0 ft) north of the bollard.
BENCH MARK STAMPING: 1250 B 1978
DESIGNATION: 841 1250 B
MONUMENTATION: Tidal Station disk VM#: 154
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete bollard foundation OPUS PID:
LATITUDE: 44° 38.5' N ( 44.64119) LONGITUDE: 67° 17.8' W ( -67.29725)
The bench mark is a disk set in the concrete foundation for the bollard located
at the SW corner of the fuel pier, 19.02 m (62.4 ft) SW of the SW corner of the
seawater pump house, 6.07 m (19.9 ft) NW of the west side of the catwalk leading
to the southern octagon shaped pier, 0.70 m (2.3 ft) NW of the SW face of the
pier, and 0.61 m (2.0 ft) NW of the bollard.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 8
Station ID: 8411250 PUBLICATION DATE: 06/23/2010
Name: CUTLER NAVAL BASE, MACHIAS BAY
ME
NOAA Chart: 13327 Latitude: 44° 38.5' N ( 44.64170)
USGS Quad: MACHIAS BAY Longitude: 67° 17.8' W ( -67.29670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 1250 C 1978
DESIGNATION: 841 1250 C
MONUMENTATION: Tidal Station disk VM#: 155
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 44° 38.5' N ( 44.64150) LONGITUDE: 67° 17.8' W ( -67.29694)
The bench mark is a disk set in the concrete foundation of the light pole
located in the vicinity of the seawater pump house on the fuel pier, 7.89 m
(25.9 ft) south of the south corner of the seawater pump house, 2.74 m (9.0 ft)
south of the pier centerline, and 0.18 m (0.6 ft) north of the south face of the
pier.
BENCH MARK STAMPING: 1250 D 1978
DESIGNATION: 841 1250 D
MONUMENTATION: Tidal Station disk VM#: 156
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete retaining wall OPUS PID:
LATITUDE: 44° 38.5' N ( 44.64128) LONGITUDE: 67° 17.7' W ( -67.29547)
The bench mark is a disk set in the concrete retaining wall located along the
southern side of the fuel pier, 10.12 m (33.2 ft) SW of the SW corner of the
stripper pump house, 4.36 m (14.3 ft) west of the fire hydrant on the south face
of the pier, 2.87 m (9.4 ft) south of the pier centerline, 3.11 m (10.2 ft)
south of the centerline of the concrete walkway leading to the tide house, and
0.52 m (1.7 ft) south of the west end of the wooden guard railing.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 8
Station ID: 8411250 PUBLICATION DATE: 06/23/2010
Name: CUTLER NAVAL BASE, MACHIAS BAY
ME
NOAA Chart: 13327 Latitude: 44° 38.5' N ( 44.64170)
USGS Quad: MACHIAS BAY Longitude: 67° 17.8' W ( -67.29670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 1250 E 1978
DESIGNATION: 841 1250 E
MONUMENTATION: Tidal Station disk VM#: 157
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete retaining wall OPUS PID:
LATITUDE: 44° 38.5' N ( 44.64172) LONGITUDE: 67° 17.7' W ( -67.29567)
The bench mark is a disk set in the concrete retaining wall located along the
north side of the fuel pier, 8.90 m (29.2 ft) west of the NW corner of the
stripper pump house, 6.40 m (21.0 ft) north of the pier centerline, and 0.43 m
(1.4 ft) east of the west face of the wall.
BENCH MARK STAMPING: 1250 H 1978
DESIGNATION: 841 1250 H
MONUMENTATION: Tidal Station disk VM#: 159
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete step OPUS PID:
LATITUDE: 44° 38.5' N ( 44.64153) LONGITUDE: 67° 17.7' W ( -67.29439)
The bench mark is a disk set in the bottom step of the NE entrance to the power
plant, building number 103, 23.68 m (77.7 ft) west of the centerline of the road
around the building, 9.85 m (32.3 ft) north of the NW corner of the chain link
fence surrounding transformers, 0.85 m (2.8 ft) east of the east wall, and 0.12
m (0.4 ft) above ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 8
Station ID: 8411250 PUBLICATION DATE: 06/23/2010
Name: CUTLER NAVAL BASE, MACHIAS BAY
ME
NOAA Chart: 13327 Latitude: 44° 38.5' N ( 44.64170)
USGS Quad: MACHIAS BAY Longitude: 67° 17.8' W ( -67.29670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 1250 J 1978
DESIGNATION: 841 1250 J
MONUMENTATION: Tidal Station disk VM#: 160
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Telephone manhole OPUS PID:
LATITUDE: 44° 38.6' N ( 44.64258) LONGITUDE: 67° 17.5' W ( -67.29194)
The bench mark is a disk set on top of a telephone manhole located along the
road leading to the power plant, 0.2 km (0.1 mi) east of the intersection of the
power plant road and the road leading to the pier, 18.50 m (60.7 ft) north of
the power plant road centerline, 2.80 m (9.2 ft) SW of another manhole, and 0.85
m (2.8 ft) above ground.
BENCH MARK STAMPING: 1250 K 1978
DESIGNATION: 841 1250 K
MONUMENTATION: Tidal Station disk VM#: 161
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Telephone manhole OPUS PID:
LATITUDE: 44° 38.6' N ( 44.64314) LONGITUDE: 67° 17.4' W ( -67.29056)
The bench mark is a disk set on top of a telephone manhole located along the
road leading to the power plant, 0.3 km (0.2 mi) east of the intersection of the
road leading to the pier and the power plant road, 19.90 m (65.3 ft) north of
power plant road centerline, 2.83 m (9.3 ft) SW of the center of the easterly
manhole, and 0.85 m (2.8 ft) above ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 8
Station ID: 8411250 PUBLICATION DATE: 06/23/2010
Name: CUTLER NAVAL BASE, MACHIAS BAY
ME
NOAA Chart: 13327 Latitude: 44° 38.5' N ( 44.64170)
USGS Quad: MACHIAS BAY Longitude: 67° 17.8' W ( -67.29670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 1250 L 1978
DESIGNATION: 841 1250 L
MONUMENTATION: Tidal Station disk VM#: 162
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Foundation for large antenna OPUS PID:
LATITUDE: 44° 38.7' N ( 44.64500) LONGITUDE: 67° 17.4' W ( -67.29000)
The bench mark is a disk set in the westernmost concrete foundation supporting
tower number 385 of radio tower N-7, located along dirt road H north of the dirt
road's intersection with the road leading to the power plant, 27 m (89 ft) east
of the centerline of road H, 5.15 m (16.9 ft) east of the east side of building
number 388, and 1 m (2 ft) above ground.
BENCH MARK STAMPING: 1250 N 1991
DESIGNATION: 841 1250 N
MONUMENTATION: Tidal Station disk VM#: 13802
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: In bedrock OPUS PID:
LATITUDE: 44° 38.6' N ( 44.64308) LONGITUDE: 67° 17.4' W ( -67.28956)
The bench mark is a disk set in bedrock located on the south side of the road
leading to the power plant, 69 m (225 ft) SW of the centerline of the power
plant road and dirt road H intersection, 49 m (160 ft) east of the SE corner of
a drain culvert, 26.52 m (87.0 ft) SSE of the centerline of the road leading to
the power plant, and 0.21 m (0.7 ft) above ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 8
Station ID: 8411250 PUBLICATION DATE: 06/23/2010
Name: CUTLER NAVAL BASE, MACHIAS BAY
ME
NOAA Chart: 13327 Latitude: 44° 38.5' N ( 44.64170)
USGS Quad: MACHIAS BAY Longitude: 67° 17.8' W ( -67.29670)
T I D A L D A T U M S
Tidal datums at CUTLER NAVAL BASE, MACHIAS BAY based on:
LENGTH OF SERIES: 10 YEARS
TIME PERIOD: September 1999 - August 2009
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8418150 PORTLAND, CASCO BAY
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (01/10/1997) = 5.367
MEAN HIGHER HIGH WATER MHHW = 4.132
MEAN HIGH WATER MHW = 4.004
MEAN TIDE LEVEL MTL = 2.059
MEAN SEA LEVEL MSL = 2.057
MEAN LOW WATER MLW = 0.115
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (03/16/1980) = -1.013
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
1250 M 1991 8.854 4.850
1250 A 1978 7.118 3.114
1250 B 1978 7.125 3.121
1250 C 1978 7.113 3.109
1250 D 1978 6.627 2.623
1250 E 1978 6.643 2.639
1250 H 1978 11.511 7.507
1250 J 1978 15.532 11.528
1250 K 1978 15.372 11.368
1250 L 1978 14.975 10.971
1250 N 1991 16.654 12.650
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 8
Station ID: 8411250 PUBLICATION DATE: 06/23/2010
Name: CUTLER NAVAL BASE, MACHIAS BAY
ME
NOAA Chart: 13327 Latitude: 44° 38.5' N ( 44.64170)
USGS Quad: MACHIAS BAY Longitude: 67° 17.8' W ( -67.29670)
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.