Bench Mark Sheet for 1631428, Pago Bay, Guam United States of America

Superseded Epoch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Small blue map location marker Unpublished bench mark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: 1631428                         PUBLICATION DATE:  11/22/2011
Name:       PAGO BAY, GUAM, PACIFIC OCEAN                     
NOAA Chart: 81048                           Latitude:   13° 25.7' N (  13.42830)
USGS Quad:  AGANA                           Longitude: 144° 47.8' E ( 144.79700)


To reach the tidal bench marks from the Guam International Airport, exit the
airport and turn right (north) on Highway 10A, follow it to the intersection
with Highway 16 and turn right, follow 16 to the intersection with Highway 10
and turn left, follow 10 to the turn off for Highway 32 and turn left.  Highway
32 will take you onto the campus of the University of Guam, stay on it past the
main campus buildings to a three way stop, continue straight, and down a steep
hill, to the Marine Laboratory building.  The tidal bench marks are located on
the University of Guam property.  The tide gauge instruments are located on the
east wall of room 104, in the lower level of the Marine Lab.


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


                 PRIMARY BENCH MARK STAMPING:  1428 B 2004
                         DESIGNATION:          163 1428 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        17608
AGENCY:                  National Ocean Service (NOS)          IDB PID#:  DH3105
SETTING CLASSIFICATION:  Beach limestone outcrop               OPUS PID:        
LATITUDE:   13° 25.7' N (  13.42769)          LONGITUDE: 144° 47.9' E ( 144.79886)


The primary bench mark is set in a limestone outcrop on the beach to the west of
the sea water intake sump for the University of Guam Marine Laboratory in
Mangilao, Guam, 11.03 m (36.2 ft) west of the SW corner of a cyclone fence
around the sump, 1.46 m (4.8 ft) south of the SW corner of the concrete sea wall
at the bottom of a concrete ramp between the Marine Lab and the beach, 0.61 m
(2.0 ft) east of the west face of limestone outcrop, and  1.37 m (4.5 ft) above
the apparent high water line.

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

                                                                                
Station ID: 1631428                         PUBLICATION DATE:  11/22/2011
Name:       PAGO BAY, GUAM, PACIFIC OCEAN                     
NOAA Chart: 81048                           Latitude:   13° 25.7' N (  13.42830)
USGS Quad:  AGANA                           Longitude: 144° 47.8' E ( 144.79700)


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


                         BENCH MARK STAMPING:  1428 A 2004
                         DESIGNATION:          163 1428 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        17607
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Bedrock beach                         OPUS PID:        
LATITUDE:   13° 25.0' N (  13.41675)          LONGITUDE: 144° 48.0' E ( 144.79917)


The bench mark is set in the bedrock beach to the east of the sea water intake
sump for the University of Guam Marine Laboratory in Mangilao, Guam, 16.30 m
(53.5 ft) east of the SE corner of a cyclone fence around the sump, 5.54 m (18.2
ft) west of the 15 m (49 ft) cliff bordering the shore,  2 m (6.5 ft) north of
the apparent high water line, and 0.6 m (2.0 ft) above the apparent high water
line.



                         BENCH MARK STAMPING:  1428 C 2004
                         DESIGNATION:          163 1428 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        17609
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete pad                          OPUS PID:        
LATITUDE:   13° 25.7' N (  13.42814)          LONGITUDE: 144° 47.9' E ( 144.79892)


The bench mark is set in the SW corner of a 4.9 m x 3.6 m (16 ft x 12 ft)
concrete pad in the lawn on the south side of the University of Guam Marine Lab
building in Mangilao, Guam,  5.73 m (18.8 ft)  south of the cinder block
retaining wall bordering the south side of the Marine Lab, 4.42 m (14.5 ft) 
west of the east side of the concrete pad, 3.29 m (10.8 ft)  east of the SE
corner of a stairway to the Marine Lab, and 0.15 m (0.5 ft) above the grade of
the lawn.

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

                                                                                
Station ID: 1631428                         PUBLICATION DATE:  11/22/2011
Name:       PAGO BAY, GUAM, PACIFIC OCEAN                     
NOAA Chart: 81048                           Latitude:   13° 25.7' N (  13.42830)
USGS Quad:  AGANA                           Longitude: 144° 47.8' E ( 144.79700)


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


                         BENCH MARK STAMPING:  1428 D 2004
                         DESIGNATION:          163 1428 D TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        17610
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete utility vault                OPUS PID:        
LATITUDE:   13° 25.7' N (  13.42856)          LONGITUDE: 144° 47.9' E ( 144.79886)


The bench mark is set in the NW corner of a 1.37 m (4.5 ft) square concrete
utility vault on the north side of the University of Guam Marine Laboratory
building in Mangilao, Guam, 2.59 m (8.5 ft) north of the Marine Lab building,
1.74 m (5.7 ft) west of the west concrete base of a stairway hand rail, and 0.37
m (1.2 ft) east of the NE corner of a concrete block supporting an air
conditioning unit.



                         BENCH MARK STAMPING:  1428 E 2004
                         DESIGNATION:          163 1428 E TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        17611
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete retaining wall               OPUS PID:        
LATITUDE:   13° 25.7' N (  13.42864)          LONGITUDE: 144° 48.0' E ( 144.79925)


The bench mark is set in the top of a concrete retaining wall on the north side
of the Water & Environmental Research Institute (WERI) of the Western Pacific
building on the University of Guam campus in Mangilao, Guam, 3.08 m (10.1 ft)
west of the east end of the retaining wall of the WERI building, 2.18 m (7.2 ft)
north of the north wall of WERI, 0.97 m (3.2 ft) south of the curb around the
parking lot, and 0.73 m (2.4 ft) above the sidewalk on the north side of the
WERI building.

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

                                                                                
Station ID: 1631428                         PUBLICATION DATE:  11/22/2011
Name:       PAGO BAY, GUAM, PACIFIC OCEAN                     
NOAA Chart: 81048                           Latitude:   13° 25.7' N (  13.42830)
USGS Quad:  AGANA                           Longitude: 144° 47.8' E ( 144.79700)


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


                         BENCH MARK STAMPING:  1214
                         DESIGNATION:          163 1428 GGN 1214

MONUMENTATION:           Survey disk                           VM#:        17612
AGENCY:                  Guam Geodetic Network                 IDB PID#:  DH2988
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   13° 25.7' N (  13.42869)          LONGITUDE: 144° 47.9' E ( 144.79839)


The bench mark is set in the top of a concrete monument, set in the ground at
the NW corner of the parking lot of the University of Guam Marine Laboratory in
Mangilao, Guam, 13.01 m (42.7 ft) north of the south edge of the parking lot,
0.49 m (1.6 ft) south of the north edge of the parking lot, and 0.37 m (1.2 ft)
east of the west edge of the parking lot, and 9 cm (0.3 ft) below grade in a
0.22 m (0.75 ft) diameter hand hole covered with a steel lid labeled "SURVEY
MARK".

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

                                                                                
Station ID: 1631428                         PUBLICATION DATE:  11/22/2011
Name:       PAGO BAY, GUAM, PACIFIC OCEAN                     
NOAA Chart: 81048                           Latitude:   13° 25.7' N (  13.42830)
USGS Quad:  AGANA                           Longitude: 144° 47.8' E ( 144.79700)


                            T I D A L   D A T U M S 


Tidal datums at PAGO BAY, GUAM, PACIFIC OCEAN based on:

     LENGTH OF SERIES:      3 YEARS
     TIME PERIOD:           Feb. 2005 - Jan. 2006 and Feb. 2009 - Jan. 2011
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  1630000 APRA HARBOR, GUAM, PACIFIC OCEAN


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

     HIGHEST OBSERVED WATER LEVEL (10/20/2004)         =  1.258
     MEAN HIGHER HIGH WATER                     MHHW   =  0.525
     MEAN HIGH WATER                            MHW    =  0.492
     MEAN TIDE LEVEL                            MTL    =  0.322
     MEAN SEA LEVEL                             MSL    =  0.309
     MEAN LOW WATER                             MLW    =  0.151
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (12/25/2004)         = -0.384



Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     1428 B 2004                                 2.568    2.076
     1428 A 2004                                 1.623    1.131
     1428 C 2004                                10.983   10.491
     1428 D 2004                                13.137   12.645
     1428 E 2004                                17.549   17.057
     1214                                       16.644   16.152


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

                                                                                
Station ID: 1631428                         PUBLICATION DATE:  11/22/2011
Name:       PAGO BAY, GUAM, PACIFIC OCEAN                     
NOAA Chart: 81048                           Latitude:   13° 25.7' N (  13.42830)
USGS Quad:  AGANA                           Longitude: 144° 47.8' E ( 144.79700)


                             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 any other fixed island datum.

This tide station location has a local island datum.  Island datums
are specific fixed geodetic datums whose elevation relationship 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/.

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