U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 9458819 PUBLICATION DATE: 04/21/2003
Name: KUJULIK BAY (NORTH SHORE)
AK
NOAA Chart: 16566 Latitude: 56° 36.8' N ( 56.61330)
USGS Quad: SUTWIK ISLAND (C-6) Longitude: 157° 59.0' W (-157.98300)
To reach the tidal bench marks from Southwestern Alaska Peninsula, go to Kujulik
Bay. The bench marks and gauge were located on rock outcrop at the bottom of a
20 m (66 ft) high cliff with grass on top, the middle point of three prominent
points found on the northern coast of the Kujulik Bay.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 2
DESIGNATION: 945 8819 TIDAL 2
MONUMENTATION: Survey disk VM#: 13151
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: Boulder OPUS PID:
LATITUDE: 56° 36.0' N ( 56.60000) LONGITUDE: 157° 59.0' W (-157.98300)
The primary bench mark is a disk set on the highest point of a large
triangular-shaped rock 3 m long X 2 m wide (9 ft X 6 ft) at extreme width, and
about 2 m (6 ft) above the beach.
BENCH MARK STAMPING: 3
DESIGNATION: 945 8819 TIDAL 3
MONUMENTATION: Survey disk VM#: 13152
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: Rock outcrop OPUS PID:
LATITUDE: 56° 36.0' N ( 56.60000) LONGITUDE: 157° 59.0' W (-157.98300)
The bench mark is a disk set on the highest point of a large rock approximately
3 m x 2 m (9 ft x 6 ft), 70 m (230 ft) west of bench mark 2, 17 m (56 ft) east
of a large projecting conical-shaped rock about 4 m (12 ft) high and 6 m (20 ft)
in diameter, and 2 m (5 ft) above the beach.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 9458819 PUBLICATION DATE: 04/21/2003
Name: KUJULIK BAY (NORTH SHORE)
AK
NOAA Chart: 16566 Latitude: 56° 36.8' N ( 56.61330)
USGS Quad: SUTWIK ISLAND (C-6) Longitude: 157° 59.0' W (-157.98300)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 8819 D 1996
DESIGNATION: 945 8819 D
MONUMENTATION: Tidal Station disk VM#: 13153
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Rock ledge OPUS PID:
LATITUDE: 56° 36.0' N ( 56.60000) LONGITUDE: 157° 59.0' W (-157.98300)
The bench mark is a disk set on a rock ledge, 60 m (197 ft) SE (150 degrees
magnetic) from bench mark 2, 6 m (20 ft) from the cliff face, and 0.50 m (1.6
ft) above the apparent high water line.
BENCH MARK STAMPING: 8819 E 1996
DESIGNATION: 945 8819 E
MONUMENTATION: Tidal Station disk VM#: 13154
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Rock ledge OPUS PID:
LATITUDE: 56° 36.0' N ( 56.60000) LONGITUDE: 157° 59.0' W (-157.98300)
The bench mark is a disk set on a rock ledge, 80 m (262 ft) west (270 degrees
magnetic) from bench mark 2, 40 m (131 ft) SE (100 degrees magnetic) from bench
mark 3, 5 m (16 ft) from the cliff face, and 0.50 m (1.6 ft) above the apparent
high water line.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 9458819 PUBLICATION DATE: 04/21/2003
Name: KUJULIK BAY (NORTH SHORE)
AK
NOAA Chart: 16566 Latitude: 56° 36.8' N ( 56.61330)
USGS Quad: SUTWIK ISLAND (C-6) Longitude: 157° 59.0' W (-157.98300)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 8819 F 1996
DESIGNATION: 945 8819 F
MONUMENTATION: Tidal Station disk VM#: 13155
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Rock ledge OPUS PID:
LATITUDE: 56° 36.0' N ( 56.60000) LONGITUDE: 157° 59.0' W (-157.98300)
The bench mark is a disk set on a rock ledge, 70 m (230 ft) NW (300 degrees
magnetic) from bench mark 3, and 0.50 m (1.6 ft) above the apparent high water
line.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 9458819 PUBLICATION DATE: 04/21/2003
Name: KUJULIK BAY (NORTH SHORE)
AK
NOAA Chart: 16566 Latitude: 56° 36.8' N ( 56.61330)
USGS Quad: SUTWIK ISLAND (C-6) Longitude: 157° 59.0' W (-157.98300)
T I D A L D A T U M S
Tidal datums at KUJULIK BAY (NORTH SHORE) based on:
LENGTH OF SERIES: 1 Month
TIME PERIOD: June 1996 - June 1996
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 9459450 SAND POINT, POPOF ISLAND
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 2.893
MEAN HIGH WATER MHW = 2.643
MEAN TIDE LEVEL MTL = 1.549
MEAN SEA LEVEL MSL = 1.512
MEAN LOW WATER MLW = 0.455
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
2 4.428 1.785
3 3.534 0.891
8819 D 1996 3.026 0.382
8819 E 1996 2.742 0.099
8819 F 1996 3.388 0.744
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 9458819 PUBLICATION DATE: 04/21/2003
Name: KUJULIK BAY (NORTH SHORE)
AK
NOAA Chart: 16566 Latitude: 56° 36.8' N ( 56.61330)
USGS Quad: SUTWIK ISLAND (C-6) Longitude: 157° 59.0' W (-157.98300)
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.