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Superseded Bench Mark Sheet for 9468756, Nome, Norton Sound AK

Present Epoch

Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  9

                                                   PUBLICATION DATE:  09/21/2000
Station ID: 9468756                                SUPERCEDED DATE:   04/21/2003
Name:       NOME, NORTON SOUND                                
            ALASKA
NOAA Chart: 16206                                  Latitude:         64° 30.0' N
USGS Quad:  NOME (C-1)                             Longitude:       165° 25.8' W


To reach the tidal bench marks from the Airport, follow sign to Nome and take
the first right turn.  The Post Office Annex is on the right side facing this
road and a bridge crosses the Snake River.  This is the road to the causeway. 
Follow the road to the intersection, turn left, and continue to end of causeway.
 Tide house is on the right, and orifice assembly is attached to south cell on
the left.  Bench marks are located in the general vicinity.


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


                 PRIMARY BENCH MARK STAMPING:   
                         DESIGNATION:          946 8756 SHEET PILE C
                         ALIAS:                 NO STAMPING 2, SHEET PILE C 1992

MONUMENTATION:           Bolt                                      VM#:    12150
AGENCY:                  Unknown                                   PID:         
SETTING CLASSIFICATION:  Sheet pile


The primary bench mark is a bolt installed in a section of the north sheet pile
cell of the Nome Causeway, located at the north end of a yellow pipe railing on
sheet pile, 23.59 m (77.4 ft) west of the southern-most bollard, 12.31 m (40.4
ft) north of the southern end of railing, 0.70 m (2.3 ft) below top of railing,
and at ground level. Note: The high point is east edge of a perpendicular plate
welded on the southern end of sheet pile cell.



                         BENCH MARK STAMPING:   
                         DESIGNATION:          946 8756 SHEET PILE B
                         ALIAS:                 NO STAMPING 1, SHEET PILE B 1992

MONUMENTATION:           Bolt                                      VM#:    12149
AGENCY:                  Unknown                                   PID:         
SETTING CLASSIFICATION:  Sheet pile


The bench mark is a 316 SS 3/8-inch bolt, welded to the southern sheet pile cell
driven to a depth of 19.81 m (65.0 ft), located on the second vertical plate
from the north end of the cell on the Nome Causeway, 16.49 m (54.1 ft) SW of the
top of orifice assembly, and 0.30 m (1.0 ft) from north end, and 0.46 m (1.5 ft)
above grade.  

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  9

                                                   PUBLICATION DATE:  09/21/2000
Station ID: 9468756                                SUPERCEDED DATE:   04/21/2003
Name:       NOME, NORTON SOUND                                
            ALASKA
NOAA Chart: 16206                                  Latitude:         64° 30.0' N
USGS Quad:  NOME (C-1)                             Longitude:       165° 25.8' W


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


                         BENCH MARK STAMPING:  8756 D 1992
                         DESIGNATION:          946 8756 D

MONUMENTATION:           Tidal Station disk                        VM#:    12151
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Concrete abutment


The bench mark is a disk set in the SE concrete bridge abutment on the Nome
Causeway, 4.79 m (15.7 ft) east of middle of road, 0.18 m (0.6 ft) east of the
east bridge railing, and 0.18 m (0.6 ft) north of the south edge of abutment.



                         BENCH MARK STAMPING:  8756 E 1992
                         DESIGNATION:          946 8756 E

MONUMENTATION:           Tidal Station disk                        VM#:    12152
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Concrete foundation


The bench mark is a disk set in a concrete foundation at the south end of the
southern-most of three roll-up doors of a large metal building at the north end
of causeway, 1.01 m (3.3 ft) north of the SE corner of the building, 0.14 m
(0.45 ft) west of the east edge of foundation, and 0.06 m (0.2 ft) north of the
south end of door way.  

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  9

                                                   PUBLICATION DATE:  09/21/2000
Station ID: 9468756                                SUPERCEDED DATE:   04/21/2003
Name:       NOME, NORTON SOUND                                
            ALASKA
NOAA Chart: 16206                                  Latitude:         64° 30.0' N
USGS Quad:  NOME (C-1)                             Longitude:       165° 25.8' W


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


                         BENCH MARK STAMPING:   
                         DESIGNATION:          946 8756 F
                         ALIAS:                 NO STAMPING 3, F 1992

MONUMENTATION:           Tidal Station disk                        VM#:    12153
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Thermopile deep rod


The bench mark is an Arctic thermopile mark installed in a 3 m (10 ft) augured
hole and back filled with a sand slurry, located near the east corner of the
State of Alaska Department of Transportation Building, 5.49 m (18.0 ft) SW of
the center of the road, 1.80 m (5.9 ft) NE of the east corner of the building,
1.04 m (3.4 ft) north of telephone pole # C17, and 0.12 m (0.4 ft) north of NOS
witness post.



                         BENCH MARK STAMPING:   
                         DESIGNATION:          946 8756 G
                         ALIAS:                 NO STAMPING 4, G 1992

MONUMENTATION:           Tidal Station disk                        VM#:    12154
AGENCY:                  National Ocean Survey (NOS)               PID:         
SETTING CLASSIFICATION:  Thermopile deep rod


The bench mark is an Arctic thermopile mark installed in a 3 m (10 ft) augured
hole and back filled with a sand slurry, located near the NE corner of the State
of Alaska Department of Transportation Building, 54.86 m (180.0 ft) NW of bench
mark 946 8756 F, 8.38 m (27.5 ft) SW of the center of the road, 4.36 m (14.3 ft)
SE of the NE corner of the building, 1.28 m (4.2 ft) SE of telephone pole # C16,
and 0.15 m (0.5 ft) SW of orange NOS witness post.  Note: Aluminum cover has
stamping BM G.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  9

                                                   PUBLICATION DATE:  09/21/2000
Station ID: 9468756                                SUPERCEDED DATE:   04/21/2003
Name:       NOME, NORTON SOUND                                
            ALASKA
NOAA Chart: 16206                                  Latitude:         64° 30.0' N
USGS Quad:  NOME (C-1)                             Longitude:       165° 25.8' W


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


                         BENCH MARK STAMPING:   
                         DESIGNATION:          946 8756 H
                         ALIAS:                 NO STAMPING 5,  H 1992

MONUMENTATION:           Tidal Station disk                        VM#:    12155
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Thermopile deep rod


The bench mark is an Arctic thermopile mark installed in a 3 m (10 ft) augured
hole and back filled with a sand slurry, located 27 m (90 ft) NE from the
entrance to the Post Office Annex, 6.40 m (21.0 ft) SE of the center of the
road, 5.91 m (19.4 ft) NE of the light pole in parking lot, 1.04 m (3.4 ft) SE
of power pole # C13, and 0.15 m (0.5 ft) NE of orange NOS witness post.  Note:
Aluminum cover has stamping BM H.



                         BENCH MARK STAMPING:  8756 K 1992
                         DESIGNATION:          946 8756 K

MONUMENTATION:           Tidal Station disk                        VM#:    12156
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Stainless steel rod


The bench mark is a disk set inside a guard rail on the east corner of the
intersection of the highway and road to causeway, 7.41 m (24.3 ft) NE of the NE
corner of the bridge over Snake River, 2.90 m (9.5 ft) east of the railing, 2.68
m (8.8 ft) NE of the stop sign, and 0.12 m (0.4 ft) NE of the orange NOS witness
post. The bench mark is set 15 cm (0.5 ft) below ground, crimped to a 1/2-inch
stainless steel deep rod driven to a depth of 8.5 m (28 ft) to refusal.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  9

                                                   PUBLICATION DATE:  09/21/2000
Station ID: 9468756                                SUPERCEDED DATE:   04/21/2003
Name:       NOME, NORTON SOUND                                
            ALASKA
NOAA Chart: 16206                                  Latitude:         64° 30.0' N
USGS Quad:  NOME (C-1)                             Longitude:       165° 25.8' W


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


                         BENCH MARK STAMPING:  8756 L 1992
                         DESIGNATION:          946 8756 L

MONUMENTATION:           Tidal Station disk                        VM#:    12157
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Stainless steel rod


The bench mark is a disk set under tower for wind sock and airport flood lights
on south side of highway, 12.80 m (42.0 ft) north of power pole #FAA7, 4.75 m
(15.6 ft) south of the highway guard rail, 0.91 m (3.0 ft) SE of the NW corner
of tower, and 0.15 m (0.5 ft) NW of orange NOS witness post.  The bench mark is
set 15 cm (0.5 ft) below ground, crimped to a 1/2-inch stainless steel deep rod
driven to a depth of 8.5 m (28 ft) to refusal.



                         BENCH MARK STAMPING:  8756 M 1992
                         DESIGNATION:          946 8756 M

MONUMENTATION:           Tidal Station disk                        VM#:    12158
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Unspecified deep rod


The bench mark is a disk located in fenced off area for Public Health, east of
the road leading to causeway, 17.83 m (58.5 ft) east of a cyclone fence,15.39 m
(50.5 ft) north of the north side of quonset hut, 0.43 m (1.4 ft) north of power
pole, and 0.18 m (0.6 ft) west of an orange NOS witness post. The bench mark is
set 15 cm (0.5 ft) below ground, crimped to an unspecified rod driven to a depth
of 15.2 m (50 ft) to refusal.  Note: Aluminum cover has stamping M.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  9

                                                   PUBLICATION DATE:  09/21/2000
Station ID: 9468756                                SUPERCEDED DATE:   04/21/2003
Name:       NOME, NORTON SOUND                                
            ALASKA
NOAA Chart: 16206                                  Latitude:         64° 30.0' N
USGS Quad:  NOME (C-1)                             Longitude:       165° 25.8' W


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


                         BENCH MARK STAMPING:  BM 3 1969
                         DESIGNATION:          946 8756 BM 3

MONUMENTATION:           Tidal Station disk                        VM#:    12160
AGENCY:                  US Coast & Geodetic Survey (USC&GS)       PID:         
SETTING CLASSIFICATION:  Concrete slab


The bench mark is a disk set flush in a concrete slab inside entrance to Weather
Bureau which is on the north side of the FAA Flight Services Building at the
east end of the Nome Airport, 0.61 m (2.0 ft) east of the west side of slab, and
0.30 m (1.0 ft) north of the south side. 

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of  9

                                                   PUBLICATION DATE:  09/21/2000
Station ID: 9468756                                SUPERCEDED DATE:   04/21/2003
Name:       NOME, NORTON SOUND                                
            ALASKA
NOAA Chart: 16206                                  Latitude:         64° 30.0' N
USGS Quad:  NOME (C-1)                             Longitude:       165° 25.8' W


                            T I D A L   D A T U M S 


Tidal datums at NOME, NORTON SOUND based on:

     LENGTH OF SERIES:      2 YEARS
     TIME PERIOD:           December 1997 - November 1999
     TIDAL EPOCH:           1960-1978
     CONTROL TIDE STATION:   


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

     HIGHEST OBSERVED WATER LEVEL (10/06/1992)         =  2.648
     MEAN HIGHER HIGH WATER                     MHHW   =  0.451
     MEAN HIGH WATER                            MHW    =  0.401
     MEAN TIDE LEVEL                            MTL    =  0.246
     MEAN SEA LEVEL                             MSL    =  0.245
     MEAN LOW WATER                             MLW    =  0.090
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (01/09/1999)         = -1.715



Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     946 8756 SHEET PILE C                       4.530    4.129
     946 8756 SHEET PILE B                       5.012    4.611
     8756 D 1992                                 5.047    4.646
     8756 E 1992                                 5.108    4.706
     946 8756 F                                  3.928    3.526
     946 8756 G                                  3.966    3.564
     946 8756 H                                  3.767    3.365
     8756 K 1992                                 4.190    3.788
     8756 L 1992                                 4.223    3.822
     8756 M 1992                                 3.989    3.588
     BM 3 1969                                   5.108    4.707


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  8 of  9

                                                   PUBLICATION DATE:  09/21/2000
Station ID: 9468756                                SUPERCEDED DATE:   04/21/2003
Name:       NOME, NORTON SOUND                                
            ALASKA
NOAA Chart: 16206                                  Latitude:         64° 30.0' N
USGS Quad:  NOME (C-1)                             Longitude:       165° 25.8' W


Foot Notes:

Nome, Alaska has tidal datums based on an average from two years of record with
no control station available in the region to refer the tidal datums to a 19
year National Tidal Datum Epoch (NTDE).  Based on the available data, historical
and present, there appears to be an anomalous sea level change compared to most
other geographical locations in the United States.  As additional years of data
become available, the tidal datums will be updated and anomalous sea level
changes assessed further.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  9 of  9

                                                   PUBLICATION DATE:  09/21/2000
Station ID: 9468756                                SUPERCEDED DATE:   04/21/2003
Name:       NOME, NORTON SOUND                                
            ALASKA
NOAA Chart: 16206                                  Latitude:         64° 30.0' N
USGS Quad:  NOME (C-1)                             Longitude:       165° 25.8' W


                             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 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 9468756 Nome, Norton Sound, AK

Revised: 08/08/2018
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