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Bench Mark Sheet for 9459949, Cold Bay 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 9459949                         PUBLICATION DATE:  11/21/2013
Name:       COLD BAY (2 MILES W OF DELTA PT)                  
            AK
NOAA Chart: 16549                           Latitude:   55° 12.5' N (  55.20830)
USGS Quad:  COLD BAY (A-3)                  Longitude: 162° 41.9' W (-162.69800)


From the shack on the Cold Bay Pier, proceed SW along the pier for 154.7 m on a
course on the edge of the boat ramp entrance, then proceed 45.2 m on a course
near the telephone booth. The bench marks are located along and near the Cold
Bay pier.


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


                 PRIMARY BENCH MARK STAMPING:  9949 D 2013
                         DESIGNATION:          945 9949 D

MONUMENTATION:           Tidal Station disk                    VM#:        20854
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Cemented into peir                    OPUS PID:        
LATITUDE:   55° 12.3' N (  55.20550)          LONGITUDE: 162° 42.0' W (-162.70050)


The benchmark is a disk set flush into the Cold Bay pier approximately 356.8 m
(1170.6 ft) SW from the shack at the end of the pier, 293.9 m (964.2 ft) NE 
from bench mark 945 9949 A, 259.4 m (851.0 ft) NE from bench mark 945 9949 B,
204.1 m (669.3 ft) SW from bench mark 945 9949 E, and 147.7 m (484.6 ft) NE from
bench mark 945 9949 C.

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

                                                                                
Station ID: 9459949                         PUBLICATION DATE:  11/21/2013
Name:       COLD BAY (2 MILES W OF DELTA PT)                  
            AK
NOAA Chart: 16549                           Latitude:   55° 12.5' N (  55.20830)
USGS Quad:  COLD BAY (A-3)                  Longitude: 162° 41.9' W (-162.69800)


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


                         BENCH MARK STAMPING:  9949 E 2013
                         DESIGNATION:          945 9949 E

MONUMENTATION:           Tidal Station disk                    VM#:        20853
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Cemented into peir                    OPUS PID:        
LATITUDE:   55° 12.4' N (  55.20650)          LONGITUDE: 162° 41.9' W (-162.69800)


The  bench mark is a disk set flush into the Cold Bay pier located 497.7 m NE of
bench mark 945 9949 A, 463.8 m (1521.7 ft) NE of bench mark 945 9949 B, 352.1 m
(1155.2 ft) of 945 9949 bench mark C, 204.1 m (669.6 ft) NE of bench mark 949
9949 D, and 155.7 m (510.8 ft) SW of  the shack at the end of the pier.



                         BENCH MARK STAMPING:  9949 C 2013
                         DESIGNATION:          945 9949 C

MONUMENTATION:           Tidal Station disk                    VM#:        20855
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Cemented into the peir                OPUS PID:        
LATITUDE:   55° 12.3' N (  55.20467)          LONGITUDE: 162° 42.1' W (-162.70233)


The benchmark is a disk set flush into the Cold Bay pier approximately 504.5 m
(1,655.2 ft) SW from the shack at the end of the pier, 352.4 m (1,156.2 ft) SW
from bench mark 945 9949 E, 147.7 m (484.6 ft) SW from bench mark 945 9949 D,
147.4 m (483.6 ft) NE from bench mark 945 9949 A, and 112.6 m (369.4 ft) NE from
bench mark 945 9949 B.

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

                                                                                
Station ID: 9459949                         PUBLICATION DATE:  11/21/2013
Name:       COLD BAY (2 MILES W OF DELTA PT)                  
            AK
NOAA Chart: 16549                           Latitude:   55° 12.5' N (  55.20830)
USGS Quad:  COLD BAY (A-3)                  Longitude: 162° 41.9' W (-162.69800)


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


                         BENCH MARK STAMPING:  9949 B 2013
                         DESIGNATION:          945 9949 B

MONUMENTATION:           Tidal Station disk                    VM#:        20856
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Cemented into concrete boat ramp      OPUS PID:        
LATITUDE:   55° 12.3' N (  55.20417)          LONGITUDE: 162° 42.2' W (-162.70400)


The benchmark is a disk set flush into the concrete boat ramp at the base of the
Cold Bay pier approximately 616.6 m (2023.0 ft) SW from the shack at the end of
the pier, 464.0 m (1522.3 ft) SW from bench mark 945 9949 E, 259.8 m (852.4 ft)
SW from bench mark 945 9949 D, 112.6 m (369.4 ft) SW from bench mark 945 9949 C,
and 45.9  m (150.6 ft) north from bench mark 945 9949 A.



                         BENCH MARK STAMPING:  9949 A 2013
                         DESIGNATION:          945 9949 A

MONUMENTATION:           Tidal Station disk                    VM#:        20857
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Cemented into telephone booth foundationOPUS PID:        
LATITUDE:   55° 12.2' N (  55.20367)          LONGITUDE: 162° 42.3' W (-162.70417)


The benchmark is a disk set flush into the cement base of the telephone booth
near the base of the Cold Bay pier approximately 650.9 m (2135.5 ft) SW from the
shack at the end of the pier, 497.9 m (1633.5 ft) SW from bench makr 945 9949 E,
294 m (964.6 ft) SW from bench mark 945 9949 D, 147.4 m (483.6 ft) SW from bench
mark 945 9949 C, and 45.9 m (150.6 ft) south from bench mark 945 9949 A.

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

                                                                                
Station ID: 9459949                         PUBLICATION DATE:  11/21/2013
Name:       COLD BAY (2 MILES W OF DELTA PT)                  
            AK
NOAA Chart: 16549                           Latitude:   55° 12.5' N (  55.20830)
USGS Quad:  COLD BAY (A-3)                  Longitude: 162° 41.9' W (-162.69800)


                            T I D A L   D A T U M S 


Tidal datums at COLD BAY (2 MILES W OF DELTA PT) based on:

     LENGTH OF SERIES:      1 MONTH
     TIME PERIOD:           August 24, 2013 - September 23, 2013
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  9459881 KING COVE, DEER PASSAGE, PACIFIC OCEAN


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

     MEAN HIGHER HIGH WATER                     MHHW   =  2.262
     MEAN HIGH WATER                            MHW    =  2.048
     MEAN TIDE LEVEL                            MTL    =  1.228
     MEAN SEA LEVEL                             MSL    =  1.216
     MEAN LOW WATER                             MLW    =  0.408
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     9949 D 2013                                 5.857    3.809
     9949 E 2013                                 5.868    3.821
     9949 C 2013                                 6.594    4.546
     9949 B 2013                                13.624   11.576
     9949 A 2013                                15.161   13.113


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

                                                                                
Station ID: 9459949                         PUBLICATION DATE:  11/21/2013
Name:       COLD BAY (2 MILES W OF DELTA PT)                  
            AK
NOAA Chart: 16549                           Latitude:   55° 12.5' N (  55.20830)
USGS Quad:  COLD BAY (A-3)                  Longitude: 162° 41.9' W (-162.69800)


                             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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Products available at 9459949 Cold Bay, AK

Revised: 08/08/2018
NOAA / National Ocean Service
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