U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 8423005 PUBLICATION DATE: 05/24/2017
Name: ATLANTIC TERMINALS T14A
NH
NOAA Chart: 13285 Latitude: 43° 7.0' N ( 43.11670)
USGS Quad: PORTSMOUTH Longitude: 70° 48.7' W ( -70.81170)
The station is located at the Sprague Terminal, Oil & Natural Gas Company,
approximately 6 km (3.7 mi) north of Route 95, Exit 4 off of Route 4, Spalding
Turnpike North, travel 521 m (1,712 ft) from Shattuck way main gate,
approximately 59.7 m (196 ft) along the dock, from the edge of the service road,
and 41.8 m (137 ft) SE of the SE corner of a building on the banks of the
Piscataqua River near the boat pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 3 1975
DESIGNATION: 842 3005 TIDAL 3
MONUMENTATION: Bench Mark disk VM#: 22215
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete OPUS PID:
LATITUDE: 43° 7.0' N ( 43.11603) LONGITUDE: 70° 48.7' W ( -70.81214)
The bench mark is set in concrete in the west corner of a 1.22 m by 1.22 m (4 ft
by 4 ft) square concrete pad located near the bank of Piscataqua River, 45.48 m
(149.2 ft) SSE of BASIN B 2016, 19.81 m (65.0 ft) north of the red fire
department call box, 14.20 m (46.6 ft) south of the guard rail, and 11.64 m
(38.2 ft) east of the eastern edge of the concrete apron for the concrete silo.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 8423005 PUBLICATION DATE: 05/24/2017
Name: ATLANTIC TERMINALS T14A
NH
NOAA Chart: 13285 Latitude: 43° 7.0' N ( 43.11670)
USGS Quad: PORTSMOUTH Longitude: 70° 48.7' W ( -70.81170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: BASIN 2015
DESIGNATION: 842 3005 BASIN
MONUMENTATION: Bench Mark disk VM#: 22209
AGENCY: US Army Corp of Engineers (USACE) IDB PID#:
SETTING CLASSIFICATION: Concrete deck OPUS PID:
LATITUDE: 43° 7.0' N ( 43.11589) LONGITUDE: 70° 48.6' W ( -70.81011)
The bench mark is set in a concrete deck in the NW corner of the southernmost
mooring dolphin, located 4.45 m (14.6 ft) NW of the SE edge of the pier, 2.53 m
(8.3 ft) NW of the yellow bollard, 1.00 m (3.2 ft) SW of the NE corner of the
pier, and 0.58 m (1.9 ft) SE of the NW edge of the pier.
BENCH MARK STAMPING: BASIN A 2016
DESIGNATION: 842 3005 BASIN A
MONUMENTATION: Bench Mark disk VM#: 22211
AGENCY: US Army Corp of Engineers (USACE) IDB PID#:
SETTING CLASSIFICATION: Pavement OPUS PID:
LATITUDE: 43° 6.9' N ( 43.11547) LONGITUDE: 70° 48.7' W ( -70.81197)
The bench mark is set in the bottom of a concrete retaining wall at the edge of
a service road where the concrete meets pavement, located 35.91 m (117.8 ft)
south of the southern bay door truck entrance for the concrete silo, 34.99 m
(114.8 ft) NNW of top of the stairwell of the wooden auxiliary boat pier, 7.44 m
(24.4 ft) SW of the SW corner of the steel structural beam of the cement truck
loader, and 0.65 m (2.13 ft) east of a concrete block wall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 8423005 PUBLICATION DATE: 05/24/2017
Name: ATLANTIC TERMINALS T14A
NH
NOAA Chart: 13285 Latitude: 43° 7.0' N ( 43.11670)
USGS Quad: PORTSMOUTH Longitude: 70° 48.7' W ( -70.81170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: BASIN B 2016
DESIGNATION: 842 3005 BASIN B
MONUMENTATION: Bench Mark disk VM#: 22212
AGENCY: US Army Corp of Engineers (USACE) IDB PID#:
SETTING CLASSIFICATION: Pavement OPUS PID:
LATITUDE: 43° 7.0' N ( 43.11619) LONGITUDE: 70° 48.8' W ( -70.81264)
The bench mark is set in concrete at the edge of a service road where the
concrete meets pavement near storage silos, located 26.00 m (85.3 ft) north of
the northern bay door truck entrance for the concrete silo, 12.86 m (42.2 ft)
north of the base of a galvanized steel stairwell, 6.06 m (19.9 ft) west of the
guard rail, and 1.86 m (6.1 ft) SE of a steel Wrong Way sign post.
BENCH MARK STAMPING: BASIN C 2016
DESIGNATION: 842 3005 BASIN C
MONUMENTATION: Bench Mark disk VM#: 22213
AGENCY: US Army Corp of Engineers (USACE) IDB PID#:
SETTING CLASSIFICATION: Concrete headwall OPUS PID:
LATITUDE: 43° 6.9' N ( 43.11444) LONGITUDE: 70° 48.7' W ( -70.81197)
The bench mark is set in the top of a concrete headwall at the NE corner of the
northernmost headwall where utility pipes run under the service road, located
24.78 m (81.3 ft) west of the SW corner of the wood stairs, 17.2 m (56.4 ft) WNW
of black metal light pole, 4.85 m (15.9 ft) west of the centerline of the road,
0.17 m (.55 ft) east of the western edge of the concrete, and 0.61 m (2 ft)
below grade of road.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 8423005 PUBLICATION DATE: 05/24/2017
Name: ATLANTIC TERMINALS T14A
NH
NOAA Chart: 13285 Latitude: 43° 7.0' N ( 43.11670)
USGS Quad: PORTSMOUTH Longitude: 70° 48.7' W ( -70.81170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: BASIN D 2016
DESIGNATION: 842 3005 BASIN D
MONUMENTATION: Bench Mark disk VM#: 22214
AGENCY: US Army Corp of Engineers (USACE) IDB PID#:
SETTING CLASSIFICATION: Concrete pad OPUS PID:
LATITUDE: 43° 6.9' N ( 43.11525) LONGITUDE: 70° 49.0' W ( -70.81694)
The bench mark is set in concrete at the edge of a service road at the corner of
a concrete pad at a large storage silo, located 21.88 m (71.8 ft) north of the
NW corner of a maintenance building, 10.61 m (34.8 ft) west of the base of metal
stairs, 5.61 m (18.4 ft) SE from a yellow sign post labeled "North Road Loading
Rack", and 1.10 m (3.6 ft) SE from the NW corner of the concrete pad.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 8423005 PUBLICATION DATE: 05/24/2017
Name: ATLANTIC TERMINALS T14A
NH
NOAA Chart: 13285 Latitude: 43° 7.0' N ( 43.11670)
USGS Quad: PORTSMOUTH Longitude: 70° 48.7' W ( -70.81170)
T I D A L D A T U M S
Tidal datums at ATLANTIC TERMINALS T14A based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: October 2016 - December 2016
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8423898 FORT POINT, NEWCASTLE ISLAND
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 2.248
MEAN HIGH WATER MHW = 2.133
North American Vertical Datum NAVD88 = 1.216
MEAN SEA LEVEL MSL = 1.128
MEAN TIDE LEVEL MTL = 1.106
MEAN LOW WATER MLW = 0.080
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 3 1975 5.167 3.034
BASIN 2015 4.340 2.207
BASIN A 2016 6.284 4.151
BASIN B 2016 6.736 4.603
BASIN C 2016 7.949 5.816
BASIN D 2016 7.034 4.901
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 8423005 PUBLICATION DATE: 05/24/2017
Name: ATLANTIC TERMINALS T14A
NH
NOAA Chart: 13285 Latitude: 43° 7.0' N ( 43.11670)
USGS Quad: PORTSMOUTH Longitude: 70° 48.7' W ( -70.81170)
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.