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Bench Mark Sheet for 9494168, Wainwright Inlet 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  6

                                                                                
Station ID: 9494168                         PUBLICATION DATE:  08/06/2009
Name:       WAINWRIGHT INLET, CHUKCHI SEA                     
            AK
NOAA Chart: 16085                           Latitude:   70° 35.9' N (  70.59830)
USGS Quad:  WAINWRIGHT (C-2)                Longitude: 160°  6.5' W (-160.10800)


To reach the tidal bench marks from the Wainwright Inlet boat launch 0.5 mi (1.6
km) SSE of the school, proceed by boat 3.7 mi (5.95 km) SSW on the inlet to
Point Collie, then proceed 0.9 mi (1.46 km) NW around the point, and then
proceed 0.4 mi (0.64 km) NNE to the north side of a manmade channel. The bench
marks located are north and east of the tide station on the perimeter of a
grassy plateau.


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


                 PRIMARY BENCH MARK STAMPING:  4168 TIDAL 3
                         DESIGNATION:          949 4168 TIDAL 3

MONUMENTATION:           Survey disk                           VM#:        18769
AGENCY:                  US Coast and Geodetic Survey (USCGS)  IDB PID#:        
SETTING CLASSIFICATION:  Metal pipe                            OPUS PID:        
LATITUDE:   70° 35.9' N (  70.59875)          LONGITUDE: 160°  7.0' W (-160.11611)


The primary bench mark is a disk welded to the top of an iron pipe set on top of
an old sod home, 308.5 m (1012.1 ft) NNE of bench mark 949 4168 A, 83.28 m
(273.2 ft) SE of bench mark 949 4168 C, 78.25 m (256.7 ft) east of bench mark
949 4168 B, 60.83 m (199.6 ft) SW of bench mark 949 4168 E, and 0.27 m (0.88 ft)
above ground.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  6

                                                                                
Station ID: 9494168                         PUBLICATION DATE:  08/06/2009
Name:       WAINWRIGHT INLET, CHUKCHI SEA                     
            AK
NOAA Chart: 16085                           Latitude:   70° 35.9' N (  70.59830)
USGS Quad:  WAINWRIGHT (C-2)                Longitude: 160°  6.5' W (-160.10800)


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


                         BENCH MARK STAMPING:  4168 A 2008
                         DESIGNATION:          949 4168 A

MONUMENTATION:           Metal Rod                             VM#:        18764
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   70° 35.8' N (  70.59619)          LONGITUDE: 160°  7.2' W (-160.11933)


The bench mark is set 308.5 m (1012.1 ft) SSW of bench mark 949 4168 Tidal 3,
299.3 m (981.9 ft) south of bench mark 949 4168 B, 29 m (95 ft) east of the west
point of land, 10 m (33 ft) north of the dredged channel, 3.0 m (9.8 ft) south
of the centerline of a trail between two gravel berms. The bench mark is set
0.14 m (0.5 ft) below grade, being the top of a stainless steel rod driven 1.60
m (5.2 ft) to refusal, and encased in an 8-inch PVC pipe with NOS logo cover.



                         BENCH MARK STAMPING:  4168 B 2008
                         DESIGNATION:          949 4168 B

MONUMENTATION:           Metal Rod                             VM#:        18765
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   70° 35.9' N (  70.59861)          LONGITUDE: 160°  7.1' W (-160.11814)


The bench mark is set 299.29 m (981.9 ft) north of bench mark 9494168 A, 78.25 m
(256.7 ft) east of bench mark 9494168 Tidal 3, 57.06 m (187.2 ft) SSW of bench
mark 9494168 C, 18.91 m (62.0 ft) east of vegetation edge, 7.65 m (25.1 ft)
south of wooden boat and airplane constructed duck blind. The bench mark is set
0.08 m (0.3 ft) below grade, being the top of a stainless steel rod driven 1.70
m (5.6 ft) to refusal, and encased in an 8-inch PVC pipe with NOS logo cover.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  6

                                                                                
Station ID: 9494168                         PUBLICATION DATE:  08/06/2009
Name:       WAINWRIGHT INLET, CHUKCHI SEA                     
            AK
NOAA Chart: 16085                           Latitude:   70° 35.9' N (  70.59830)
USGS Quad:  WAINWRIGHT (C-2)                Longitude: 160°  6.5' W (-160.10800)


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


                         BENCH MARK STAMPING:  4168 C 2008
                         DESIGNATION:          949 4168 C

MONUMENTATION:           Metal Rod                             VM#:        18766
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   70° 36.0' N (  70.59931)          LONGITUDE: 160°  7.1' W (-160.11750)


The bench mark is set 83.28 m (273.2 ft) NW of bench mark 9494168 Tidal 3, 60.87
m (199.8 ft) south of bench mark 9494168 D, 57.06 m (187.2 ft) NNE of bench mark
9494168 B, 35.4 m (116.1 ft) east of the edge of vegetation, and 23.4 m (76.8
ft) south of the centerline of a 1 m (3 ft) deep ravine. The bench mark is set
0.10 m (0.3 ft) below grade, being the top of a stainless steel rod driven 2.78
m (9.1 ft) to refusal, and encased in an 8-inch PVC pipe with NOS logo cover.



                         BENCH MARK STAMPING:  4168 D 2008
                         DESIGNATION:          949 4168 D

MONUMENTATION:           Metal Rod                             VM#:        18767
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID#: BBBG53
LATITUDE:   70° 36.0' N (  70.59989)          LONGITUDE: 160°  7.1' W (-160.11783)


The bench mark is set 133.5 m (438.0 ft) NW of bench mark 9494168 E, 60.87 m
(199.8 ft) north of bench mark 9494168 C, 13.6 m (44.6 ft) east of the edge of
vegetation, 0.5 m (1.6 ft) west of the base of a 3 m (10 ft) high bluff. The
bench mark is set 0.17 m (0.6 ft) below grade, being the top of a stainless
steel rod driven 7.28 m (23.9 ft) to refusal, and encased in an 8-inch PVC pipe
with NOS logo cover.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  6

                                                                                
Station ID: 9494168                         PUBLICATION DATE:  08/06/2009
Name:       WAINWRIGHT INLET, CHUKCHI SEA                     
            AK
NOAA Chart: 16085                           Latitude:   70° 35.9' N (  70.59830)
USGS Quad:  WAINWRIGHT (C-2)                Longitude: 160°  6.5' W (-160.10800)


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


                         BENCH MARK STAMPING:  4168 E 2008
                         DESIGNATION:          949 4168 E

MONUMENTATION:           Metal Rod                             VM#:        18768
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   70° 35.9' N (  70.59917)          LONGITUDE: 160°  6.9' W (-160.11497)


The bench mark is set 133.47 m (438.0 ft) SE of bench mark 9494168 D, 60.83 m
(199.6 ft) NW of bench mark 9494168 Tidal 3, and 54 m (177 ft) SW of the
southern side of a pond. The bench mark is set 0.09 m (0.3 ft) below grade,
being the top of a stainless steel rod driven 1.92 m (6.3 ft) to refusal.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  6

                                                                                
Station ID: 9494168                         PUBLICATION DATE:  08/06/2009
Name:       WAINWRIGHT INLET, CHUKCHI SEA                     
            AK
NOAA Chart: 16085                           Latitude:   70° 35.9' N (  70.59830)
USGS Quad:  WAINWRIGHT (C-2)                Longitude: 160°  6.5' W (-160.10800)


                            T I D A L   D A T U M S 


Tidal datums at WAINWRIGHT INLET, CHUKCHI SEA based on:

     LENGTH OF SERIES:      2 MONTHS
     TIME PERIOD:           August 2008 - September 2008
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:   


Elevations of tidal datums referred to Mean Sea Level (MSL), in METERS:

     MEAN SEA LEVEL                             MSL    =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                                MSL

     4168 TIDAL 3                                         2.299
     4168 A 2008                                          1.672
     4168 B 2008                                          1.593
     4168 C 2008                                          1.333
     4168 D 2008                                          1.432
     4168 E 2008                                          1.285


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

                                                                                
Station ID: 9494168                         PUBLICATION DATE:  08/06/2009
Name:       WAINWRIGHT INLET, CHUKCHI SEA                     
            AK
NOAA Chart: 16085                           Latitude:   70° 35.9' N (  70.59830)
USGS Quad:  WAINWRIGHT (C-2)                Longitude: 160°  6.5' W (-160.10800)


                             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 9494168 Wainwright Inlet, AK

Revised: 10/15/2013
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services