Bench Mark Sheet for 9465265, KULUKAK POINT AK

Superseded Epoch

Large map location marker Station Location
Small red map location marker Published bench mark
Small blue map location marker Unpublished bench mark

Bench mark positions only appear on the map if their coordinates in the CO-OPS database are at the precision of degrees/minutes/seconds/and tenths of seconds. If the coordinates are less precise, the mark will not appear.

Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  5

                                                                                
Station ID: 9465265                         PUBLICATION DATE:  03/19/2019
Name:       KULUKAK POINT                                     
            AK
NOAA Chart:                                 Latitude:   58° 50.4' N (  58.84000)
USGS Quad:                                  Longitude: 159° 38.8' W (-159.64700)





                         T I D A L   B E N C H   M A R K S


                 PRIMARY BENCH MARK STAMPING:  5265 A 1985
                         DESIGNATION:          946 5265 A 1985

MONUMENTATION:           Survey disk                           VM#:        15343
AGENCY:                  National Ocean Service (NOS)          IDB PID:         
SETTING CLASSIFICATION:  Bedrock                               OPUS PID:        
LATITUDE:   58° 50.4' N (  58.84000)          LONGITUDE: 159° 38.8' W (-159.64700)


The bench mark is a disk set in bedrock, 27.43 m (90.0 ft) east of Kulukak
Point, in the center of an islet which connects to the mainland at the apparent
low water.



                         BENCH MARK STAMPING:  5265 B 1985
                         DESIGNATION:          946 5265 B 1985

MONUMENTATION:           Survey disk                           VM#:        15344
AGENCY:                  National Ocean Service (NOS)          IDB PID:         
SETTING CLASSIFICATION:  Bedrock                               OPUS PID:        
LATITUDE:   58° 50.4' N (  58.84000)          LONGITUDE: 159° 38.8' W (-159.64700)


The bench mark is a disk set in bedrock at the barnacle line, and 12.95 m (42.5
ft) NE (033  magnetic) from bench mark 5265 A 1985.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  5

                                                                                
Station ID: 9465265                         PUBLICATION DATE:  03/19/2019
Name:       KULUKAK POINT                                     
            AK
NOAA Chart:                                 Latitude:   58° 50.4' N (  58.84000)
USGS Quad:                                  Longitude: 159° 38.8' W (-159.64700)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  5265 C 1985
                         DESIGNATION:          946 5265 C 1985

MONUMENTATION:           Survey disk                           VM#:        15345
AGENCY:                  National Ocean Service (NOS)          IDB PID:         
SETTING CLASSIFICATION:  Bedrock                               OPUS PID:        
LATITUDE:   58° 50.4' N (  58.84000)          LONGITUDE: 159° 38.8' W (-159.64700)


The bench mark is a disk set in bedrock, 4.21 m (13.8 ft) NE (030  magnetic)
from bench mark 5265 B 1985, and approximately 3 m (10 ft) above the approximate
high water line.



                         BENCH MARK STAMPING:  5265 D 1985
                         DESIGNATION:          946 5265 D 1985

MONUMENTATION:           Survey disk                           VM#:        15346
AGENCY:                  National Ocean Service (NOS)          IDB PID:         
SETTING CLASSIFICATION:  Bedrock                               OPUS PID:        
LATITUDE:   58° 50.4' N (  58.84000)          LONGITUDE: 159° 38.8' W (-159.64700)


The bench mark is a disk set in bedrock, located on a rock projection pointing
south 15.91 m (52.2 ft) SE (111  magnetic) from bench mark 5265 C 1985.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  5

                                                                                
Station ID: 9465265                         PUBLICATION DATE:  03/19/2019
Name:       KULUKAK POINT                                     
            AK
NOAA Chart:                                 Latitude:   58° 50.4' N (  58.84000)
USGS Quad:                                  Longitude: 159° 38.8' W (-159.64700)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  5265 E 1985
                         DESIGNATION:          946 5265 E 1985

MONUMENTATION:           Survey disk                           VM#:        15347
AGENCY:                  National Ocean Service (NOS)          IDB PID:         
SETTING CLASSIFICATION:  Bedrock                               OPUS PID:        
LATITUDE:   58° 50.4' N (  58.84000)          LONGITUDE: 159° 38.8' W (-159.64700)


The bench mark is a disk set in bedrock on a prominent rock outcropping on the
tip of Kulukak Point, and 13.08 m (42.9 ft) NW (301  magnetic) from bench mark
5265 C 1985.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  5

                                                                                
Station ID: 9465265                         PUBLICATION DATE:  03/19/2019
Name:       KULUKAK POINT                                     
            AK
NOAA Chart:                                 Latitude:   58° 50.4' N (  58.84000)
USGS Quad:                                  Longitude: 159° 38.8' W (-159.64700)


                            T I D A L   D A T U M S 


Tidal datums at KULUKAK POINT based on:

     LENGTH OF SERIES:      2 MONTHS
     TIME PERIOD:           July 1986 - August 1986
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  9463502 PORT MOLLER, BRISTOL BAY


Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:

     MEAN HIGHER HIGH WATER                     MHHW   =  3.362
     MEAN HIGH WATER                            MHW    =  3.000
     MEAN SEA LEVEL                             MSL    =  1.802
     MEAN TIDE LEVEL                            MTL    =  1.788
     MEAN LOW WATER                             MLW    =  0.575
     MEAN LOWER LOW WATER                       MLLW   =  0.000



Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     5265 A 1985                                 9.300    6.300
     5265 B 1985                                 7.839    4.839
     5265 C 1985                                10.330    7.330
     5265 D 1985                                 9.637    6.637
     5265 E 1985                                12.278    9.278


Foot Notes:

Data from this station was collected using methodology that does not meet CO-OPS
highest level of accuracy (no more than 10 cm, 95% Confidence Interval (CI)
referenced to a tidal datum). Recognizing that lower quality data can be used
for certain applications CO-OPS is making this data available to its users with
restraint. The average six-minute water level observations derived from this
system have an accuracy ranging from 10.0 - 30.0 cm, 95% CI on datum. Users are
cautioned to consider the accuracy of these data before using them for critical
navigational or coastal engineering purposes. 

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  5

                                                                                
Station ID: 9465265                         PUBLICATION DATE:  03/19/2019
Name:       KULUKAK POINT                                     
            AK
NOAA Chart:                                 Latitude:   58° 50.4' N (  58.84000)
USGS Quad:                                  Longitude: 159° 38.8' W (-159.64700)


                             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.

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