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Bench Mark Sheet for 9463502, Port Moller 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 9463502                         PUBLICATION DATE:  05/03/2013
Name:       PORT MOLLER, BRISTOL BAY                          
            AK
NOAA Chart: 16363                           Latitude:   55° 59.4' N (  55.99000)
USGS Quad:  PORT MOLLER (D-2)               Longitude: 160° 33.7' W (-160.56200)


To reach the tide station from the Port Moller Hotel, proceed 186 m (610 ft) ESE
(120  T) to the end of the dock, turn right and proceed 20 m (66 ft) SSW (200 
T) to the water tank.  The gauge is located inside of a 3 m x 3 m (10 ft x 10
ft) room at the SE corner of the room beneath the water tank.  The orifice is
located SW of the gauge on the SW pile of the  Rine tank platform.  The bench
marks are located south of the hotel and along the spit.


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


                 PRIMARY BENCH MARK STAMPING:   
                         DESIGNATION:          946 3502 B TIDAL
                         ALIAS:                 NO STAMPING 2

MONUMENTATION:           Metal Rod                             VM#:         3136
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   55° 59.2' N (  55.98731)          LONGITUDE: 160° 34.6' W (-160.57667)


The primary bench mark is set on a small rise in a private fenced off yard for a
two story tin sided home, 17.98 m (59.0 ft) NE of the NE corner of the chain
link fence which surrounds the fuel tank farm, 13.89 m (45.6 ft) north of the
Southwestely most of two main doors on the NW face of a pole barn, 7.42 m (24.3
ft) SW of the SE corner of the two story home, and 4.11 m (13.5 ft) SE of the SE
corner of a tin garage located SW of the two story home.  The datum point is set
0.05 m (0.2 ft) above ground, being the top of a stainless steel rod driven 18.3
m (60 ft) to refusal, and encased in a 4-inch diameter x 0.2 m (0.7 ft) high PVC
pipe with cap.



                         BENCH MARK STAMPING:   
                         DESIGNATION:          946 3502 C TIDAL
                         ALIAS:                 NO STAMPING 3

MONUMENTATION:           Metal Rod                             VM#:         3137
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID#: BBFH90
LATITUDE:   55° 59.3' N (  55.98786)          LONGITUDE: 160° 34.7' W (-160.57783)


The bench mark is set near the NW end of the boardwalk and is surrounded by two
2 inch x 4 inch red wooden witness posts and one carsonite witness post, 38.51 m
(126.3 ft) NNW of 946 3502 UNSTAMPED, 20.86 m (68.4 ft) west of the door handle
to the door on the SW side of a tin home sided home, 16.40 m (53.8 ft) south of
the door handle to a single story grey painted home the Northwesterly most on
the boardwalk, and 9.63 m (31.6 ft) SW of the SW edge of the wooden sidewalk. 
The bench mark is set 0.25 m (0.8 ft) above ground, being the top of a stainless
steel rod driven 18.3 m (60 ft) to refusal, and encased in a (0.3 ft) diameter x
0.25 m (0.8 ft) high PVC pipe with cap.

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

                                                                                
Station ID: 9463502                         PUBLICATION DATE:  05/03/2013
Name:       PORT MOLLER, BRISTOL BAY                          
            AK
NOAA Chart: 16363                           Latitude:   55° 59.4' N (  55.99000)
USGS Quad:  PORT MOLLER (D-2)               Longitude: 160° 33.7' W (-160.56200)


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


                         BENCH MARK STAMPING:   
                         DESIGNATION:          946 3502 D TIDAL
                         ALIAS:                 NO STAMPING 4

MONUMENTATION:           Metal Rod                             VM#:         3138
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   55° 59.2' N (  55.98614)          LONGITUDE: 160° 34.7' W (-160.57797)


The bench mark is set in the grassy spit SW of the cannery and is surrounded by
four carsonite witness posts, 57.05 m (187.2 ft) south of bench mark 946 3502 H
TIDAL, 37.73 m (123.8 ft) east of a 2.5 m (8 ft) high abandonded rusted boiler,
and 29.75 m (97.6 ft) NE of bench mark 946 3502 E TIDAL.  The bench mark is set
0.11 m (0.4 ft) above ground, being the top of a stainless steel rod driven 18.3
m (60 ft) to refusal, and encased in a 4-inch diameter x 0.11 m (0.4 ft) high
PVC pipe with cap.



                         BENCH MARK STAMPING:   
                         DESIGNATION:          946 3502 F TIDAL
                         ALIAS:                 NO STAMPING 6

MONUMENTATION:           Aluminum marker                       VM#:         3140
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Aluminum cap                          OPUS PID:        
LATITUDE:   55° 59.2' N (  55.98742)          LONGITUDE: 160° 34.6' W (-160.57650)


The bench mark is the top of an aluminum cap set in the flower garden on the
north side of the two story tin sided home, 5.27 m (17.3 ft) NNW of the NE
corner of the home, 2.93 m (9.6 ft) east of the door centered on the north wall
of the building, 1.7 m (5.6 ft) north of the building foundation, 1.1 m (3.6 ft)
south of the south edge of the wooden sidewalk, and 0.08 m (0.3 ft) south of the
south edge of the log wall around the flower garden.  The bench mark is set
flush with the flower garden, being the top of an aluminum cap threaded onto a 1
inch by 3.0 m (10.0 ft) steel Arctic Foundation Thermopile pressurized with 600
psi of carbon dioxide and driven 3.0 m (10.0 ft) into the ground.

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

                                                                                
Station ID: 9463502                         PUBLICATION DATE:  05/03/2013
Name:       PORT MOLLER, BRISTOL BAY                          
            AK
NOAA Chart: 16363                           Latitude:   55° 59.4' N (  55.99000)
USGS Quad:  PORT MOLLER (D-2)               Longitude: 160° 33.7' W (-160.56200)


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


                         BENCH MARK STAMPING:   
                         DESIGNATION:          946 3502 G TIDAL
                         ALIAS:                 NO STAMPING 7

MONUMENTATION:           Aluminum marker                       VM#:         3141
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Aluminum cap                          OPUS PID:        
LATITUDE:   55° 59.3' N (  55.98756)          LONGITUDE: 160° 34.6' W (-160.57742)


The bench mark is the top of an aluminum cap set west of the cannery and is
surrounded by two 2 inch x 4 inch red wooden witness posts, 6.95 m (22.8 ft) SSW
of the west corner of the transformer building, 4.26 m (14.0 ft) ESE of 946 3502
UNSTAMPED, 2.43 m (8.0 ft) east of the SE leg of the satellite dish support, and
1.00 m (3.3 ft) east of the east corner of the concrete pad for the satellite
dish.  The bench mark is set 0.22 m (0.7 ft) above ground being the top of an
aluminum cap threaded onto a 1 inch by 3.0 m (10.0 ft) steel Arctic Foundation
Thermopile pressurized with 600 psi of carbon dioxide and driven 3.0 m (10.0 ft)
into the ground.



                         BENCH MARK STAMPING:   
                         DESIGNATION:          946 3502 H TIDAL
                         ALIAS:                 NO STAMPING 8

MONUMENTATION:           Aluminum marker                       VM#:         3142
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Aluminum cap                          OPUS PID#: BBBH47
LATITUDE:   55° 59.2' N (  55.98661)          LONGITUDE: 160° 34.7' W (-160.57819)


The bench mark is set in the grassy spit west of the cannery and is surrounded
by three 2 inch x 4 inch red wooden witness posts and one carsonite witness
post, 79.41 m (260.5 ft) SW of the SW corner of the chainlink fence which
surrounds the fuel tank farm, 57.05 m (187.2 ft) north of 946 3502 D TIDAL, and
10.81 m (35.5 ft) WNW of the driveshaft of an abandoned rusted diesel generator
with a winch.  The bench mark is set 0.12 m (0.4 ft) above ground, being the top
of an aluminum cap threaded onto a 1 inch by 3.0 m (10.0 ft) steel Arctic
Foundation Thermopile pressurized with 600 psi of carbon dioxide and driven 3.0
m (10.0 ft) into the ground.

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

                                                                                
Station ID: 9463502                         PUBLICATION DATE:  05/03/2013
Name:       PORT MOLLER, BRISTOL BAY                          
            AK
NOAA Chart: 16363                           Latitude:   55° 59.4' N (  55.99000)
USGS Quad:  PORT MOLLER (D-2)               Longitude: 160° 33.7' W (-160.56200)


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


                         BENCH MARK STAMPING:   
                         DESIGNATION:          946 3502 UNSTAMPED
                         ALIAS:                 NO STAMPING 9

MONUMENTATION:           Tidal Station disk                    VM#:        18235
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete pad                          OPUS PID:        
LATITUDE:   55° 59.3' N (  55.98758)          LONGITUDE: 160° 34.6' W (-160.57750)


The bench mark is a disk set flush in the concrete pad for the satellite dish on
the west side of the cannery, 38.51 m (126.3 ft) SSE of 946 3502 C TIDAL, 7.93 m
(26.0 ft) WSW of the west corner of the transformer building, 4.26 m (14.0 ft)
WNW of 946 3502 G TIDAL, 1.03 m (3.4 ft) WSW of the NE leg of the satellite
dish, 0.67 m (2.2 ft) ENE of the western leg of the satellite dish and 0.58 m
(1.9 ft) SSW (197  T) of the north edge of the concrete pad.



                         BENCH MARK STAMPING:  3502 J 2008
                         DESIGNATION:          946 3502 J

MONUMENTATION:           Tidal Station disk                    VM#:        18913
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete                              OPUS PID:        
LATITUDE:   55° 59.2' N (  55.98619)          LONGITUDE: 160° 34.5' W (-160.57428)


The bench mark is a disk set flush in concrete midway along the pier, 15.54 m
(51.0 ft) north of a fixed ladder to the water on the NE side of the pier, 4.55
m (14.9 ft) SW of the wooden bullrail, 0.71 m (2.3 ft) east of the northern most
support of the northern most and largest of two horizontal cylinders stamped
"RECEIVER", and 0.17 m (1.6 ft) SW of the edge of concrete.

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

                                                                                
Station ID: 9463502                         PUBLICATION DATE:  05/03/2013
Name:       PORT MOLLER, BRISTOL BAY                          
            AK
NOAA Chart: 16363                           Latitude:   55° 59.4' N (  55.99000)
USGS Quad:  PORT MOLLER (D-2)               Longitude: 160° 33.7' W (-160.56200)


                            T I D A L   D A T U M S 


Tidal datums at PORT MOLLER, BRISTOL BAY based on:

     LENGTH OF SERIES:      5 YEARS
     TIME PERIOD:           July 2007 - June 2010 & Sep 2010 - Aug 2012
     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:

     HIGHEST OBSERVED WATER LEVEL (12/27/2007)         =  4.341
     MEAN HIGHER HIGH WATER                     MHHW   =  3.174
     MEAN HIGH WATER                            MHW    =  2.921
     MEAN TIDE LEVEL                            MTL    =  1.795
     MEAN SEA LEVEL                             MSL    =  1.778
     MEAN LOW WATER                             MLW    =  0.670
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (12/13/2008)         = -1.376

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     946 3502 B TIDAL                            6.525    3.604
     946 3502 C TIDAL                            7.141    4.220
     946 3502 D TIDAL                            6.050    3.129
     946 3502 F TIDAL                            5.909    2.988
     946 3502 G TIDAL                            4.816    1.895
     946 3502 H TIDAL                            4.640    1.719
     946 3502 UNSTAMPED                          4.763    1.842
     3502 J 2008                                 5.506    2.585


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

                                                                                
Station ID: 9463502                         PUBLICATION DATE:  05/03/2013
Name:       PORT MOLLER, BRISTOL BAY                          
            AK
NOAA Chart: 16363                           Latitude:   55° 59.4' N (  55.99000)
USGS Quad:  PORT MOLLER (D-2)               Longitude: 160° 33.7' W (-160.56200)


                             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 9463502 Port Moller, AK

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services