U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
Station ID: 9491094 PUBLICATION DATE: 12/30/2020
Name: RED DOG DOCK
AK
NOAA Chart: 16005 Latitude: 67° 34.5' N ( 67.57581)
USGS Quad: NOATAK (C-5) Longitude: 164° 3.9' W (-164.06439)
To reach the tidal bench marks from the Red Dog Mine, proceed 84 km (52 mi) SW
on the Delong Mountain Transportation System haul road to the end of the road
and the Portside dock. Follow the overhead conveyor to cell 1 and take the
first exit. The bench marks are on the dock and alongside the haul road.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 1094 A 2003
DESIGNATION: 949 1094 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 17440
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete pad OPUS PID:
LATITUDE: 67° 34.6' N ( 67.57600) LONGITUDE: 164° 3.8' W (-164.06286)
The primary bench mark set flush in the concrete pad for the stairway and
conveyor support on the Red Dog gravel fill dock, 9.08 m (29.8 ft) south of the
north edge of the dock, 6.38 m (20.9 ft) south of bench mark 949 1094 PETE, 6.20
m (20.3 ft) SE of the west edge (seaward edge) of the dock, 4.33 m (14.2 ft)
east of the west edge of the concrete pad, 1.08 m (3.5 ft) north of the south
edge of the concrete pad, and below the stairway to the conveyor.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
Station ID: 9491094 PUBLICATION DATE: 12/30/2020
Name: RED DOG DOCK
AK
NOAA Chart: 16005 Latitude: 67° 34.5' N ( 67.57581)
USGS Quad: NOATAK (C-5) Longitude: 164° 3.9' W (-164.06439)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 1094 B 2003
DESIGNATION: 949 1094 B TIDAL
MONUMENTATION: Flange-encased Rod VM#: 17441
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: BBBD23
LATITUDE: 67° 34.6' N ( 67.57700) LONGITUDE: 164° 3.7' W (-164.06147)
The bench mark is set in the tundra 63.48 m (208.3 ft) north of bench mark 949
1094 X3, 34.75 m (114.0 ft) north of the centerline of the conveyor, and 33 m
(108 ft) west of the lowest point of the drainage ditch leading to the tundra
pond. The bench mark is set 15 cm (0.5 ft) below grade, being the top of rounded
off stainless steel rod with a punch mark driven 15.8 m (52 ft) to refusal and
encased in a 6-inch PVC pipe with NGS logo cap.
BENCH MARK STAMPING: 1094 C 2003
DESIGNATION: 949 1094 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 17442
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 67° 34.7' N ( 67.57786) LONGITUDE: 164° 3.5' W (-164.05764)
The bench mark is a disk set flush in a concrete footer near the SE corner of
the Red Dog portsite camp complex, 81.72 m (268.1 ft) west of bench mark 949
1094 X4, 11.08 m (36.4 ft) NW of the SE corner of the fire station, 1.32 m (4.33
ft) north of the north end of the most northerly of two garage doors, 0.30 m
(0.98 ft) west of the east edge of the concrete footer, 0.26 m (0.85 ft) south
of the north edge of the concrete footer, and 0.58 m (1.90 ft) below the metal
flashing on the side of the building.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 9491094 PUBLICATION DATE: 12/30/2020
Name: RED DOG DOCK
AK
NOAA Chart: 16005 Latitude: 67° 34.5' N ( 67.57581)
USGS Quad: NOATAK (C-5) Longitude: 164° 3.9' W (-164.06439)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: 949 1094 X3
ALIAS: 1094 X3 2003
MONUMENTATION: Bolt VM#: 17445
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Support base OPUS PID:
LATITUDE: 67° 34.6' N ( 67.57650) LONGITUDE: 164° 3.6' W (-164.06075)
The bench mark is a 0.04 m (0.13 ft) diameter bolt at the base of the first
vertical support for the conveyor as it approaches the dock, the NE'ly most
anchor bolt of four bolts at the base of the NE'ly most vertical support for the
dock conveyor, 107.7 m (353 ft) NE of bench mark 949 1094 PETE, 63.48 m (208.3
ft) south of bench mark 949 1094 B, 15.07 m (49.4 ft) west of the west wall of
the white metal P-10 drive house, 2.10 m (6.9 ft) south of a 0.3 m (1 ft)
diameter fuel pipe at waist height, 1.75 m (5.7 ft) north of the centerline of
the conveyor, and 0.06 m (0.2 ft) above the metal base of support.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 9491094 PUBLICATION DATE: 12/30/2020
Name: RED DOG DOCK
AK
NOAA Chart: 16005 Latitude: 67° 34.5' N ( 67.57581)
USGS Quad: NOATAK (C-5) Longitude: 164° 3.9' W (-164.06439)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: X
DESIGNATION: 949 1094 X4
ALIAS: X4
MONUMENTATION: Tidal Station disk VM#: 17446
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete pad OPUS PID:
LATITUDE: 67° 34.7' N ( 67.57778) LONGITUDE: 164° 3.3' W (-164.05553)
The bench mark is set in the NW corner of an octagonal concrete pad for a
cylindrical ore handling silo, 81.72 m (268.1 ft) east of bench mark 949 1094 C,
44.22 m (145.1 ft) WSW of bench mark 949 1094 D, 7.66 m (25.1 ft) west of the
western most bolt at the base of the center support beam under the silo, 0.25 m
(0.8 ft) east of the west edge of the octagonal concrete base, and 0.25 m (0.8
ft) SE of the NW edge of the octagonal concrete base.
BENCH MARK STAMPING:
DESIGNATION: 949 1094 X5
ALIAS: 1094 X5 2003
MONUMENTATION: Bolt VM#: 17739
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 67° 34.7' N ( 67.57825) LONGITUDE: 164° 3.2' W (-164.05403)
The bench mark is a 0.04 m (0.13 ft) diameter bolt, the NE'ly most anchor bolt
of four bolts at the base of an "A" frame supporting the round metal conveyor
leading up to the cylindrical ore handling silo, 54.56 m (179.0 ft) WSW of bench
mark 949 1094 X6, 48.06 m (157.7 ft) ENE of bench mark 949 1094 D, 8.4 m (28 ft)
SSE of the north edge of the gravel access road, 1.30 m (4.3 ft) NNW of the
centerline of the conveyor, and 0.06 m (0.20 ft) above the metal base of
support.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
Station ID: 9491094 PUBLICATION DATE: 12/30/2020
Name: RED DOG DOCK
AK
NOAA Chart: 16005 Latitude: 67° 34.5' N ( 67.57581)
USGS Quad: NOATAK (C-5) Longitude: 164° 3.9' W (-164.06439)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 1094 X6
DESIGNATION: 949 1094 X6
MONUMENTATION: Chiseled Cross VM#: 17740
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Steel girder OPUS PID:
LATITUDE: 67° 34.7' N ( 67.57864) LONGITUDE: 164° 3.2' W (-164.05308)
The bench mark is a chiseled cross cut in the NE'ly most corner of a double
girder steel support at the base of an expansion joint for the round steel
conveyor leading to the cylindrical ore handling silo, 54.56 m (179.0 ft) ENE of
bench mark 949 1094 X5, 6.9 m (23 ft) SSE of the north edge of the gravel access
road, 2.79 m (9.2 ft) NNW of the centerline of the conveyor, 0.57 m (1.9 ft) ENE
of a 0.36 m (1.2 ft) diameter vertical black pipe, and 1.40 m (5 ft) below the
gravel road.
BENCH MARK STAMPING: 1094 F 2005
DESIGNATION: 949 1094 F
MONUMENTATION: Flange-encased Rod VM#: 17887
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 67° 34.7' N ( 67.57903) LONGITUDE: 164° 3.5' W (-164.05883)
The bench mark is set in the tundra north of the portsite camp gravel pad, 100.4
m (329 ft) NE of bench mark 1094 E 2005, 100.3 m (329 ft) west of the anemometer
tower at the NE corner of the portsite camp gravel pad, 59.15 m (194.1 ft) NW of
the center of a 0.5 m (2 ft) diameter black pipe running ENE/WSW along the north
edge of the gravel pad. The bench mark is set 2 cm (0.1 ft) below grade, being
the top of a rounded off stainless steel rod with a punch mark driven 4.3 m (14
ft) to refusal and encased in a 6-inch PVC pipe with NGS logo cover.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
Station ID: 9491094 PUBLICATION DATE: 12/30/2020
Name: RED DOG DOCK
AK
NOAA Chart: 16005 Latitude: 67° 34.5' N ( 67.57581)
USGS Quad: NOATAK (C-5) Longitude: 164° 3.9' W (-164.06439)
T I D A L D A T U M S
Tidal datums at RED DOG DOCK based on:
LENGTH OF SERIES: 14 YEARS
TIME PERIOD: 11/04-10/05,5/06-4/07,7/07-6/14,2/15-1/20
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION:
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (02/25/2011) = 2.247
MEAN HIGHER HIGH WATER MHHW = 0.307
MEAN HIGH WATER MHW = 0.263
MEAN TIDE LEVEL MTL = 0.155
MEAN SEA LEVEL MSL = 0.150
MEAN LOW WATER MLW = 0.046
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (11/09/2005) = -1.773
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
1094 A 2003 3.100 2.837
1094 B 2003 2.993 2.730
1094 C 2003 8.132 7.869
949 1094 X3 3.656 3.393
X 8.700 8.437
949 1094 X5 7.707 7.444
1094 X6 6.367 6.104
1094 F 2005 6.684 6.421
Foot Notes:
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
Station ID: 9491094 PUBLICATION DATE: 12/30/2020
Name: RED DOG DOCK
AK
NOAA Chart: 16005 Latitude: 67° 34.5' N ( 67.57581)
USGS Quad: NOATAK (C-5) Longitude: 164° 3.9' W (-164.06439)
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.