U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  8

                                                                                
Station ID: 9435380                         PUBLICATION DATE:  10/28/2015
Name:       SOUTH BEACH, YAQUINA RIVER                        
            OR
NOAA Chart: 18581                           Latitude:   44° 37.5' N (  44.62500)
USGS Quad:  NEWPORT SOUTH                   Longitude: 124°  2.6' W (-124.04300)


To reach the tidal bench marks from the Highway 101 bridge over the Yaquina
River in Newport, Oregon, proceed 1 km (0.6 mi) south to first exit on the right
and follow the signs to OSU - Marine Science Center.  Proceed 1.2 km (0.8 mi) on
Marine Science Drive to the Marine Science Center's main gate.  Turn left after
entering main gate and continue to the Marine Science Center's dock.  The bench
marks are located in the vicinity of the tide house on the Property of Oregon
State University Marine Science center.  The tide house is located on the east
end of the dock.


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


                 PRIMARY BENCH MARK STAMPING:  C 590 1965
                         DESIGNATION:          C 590

MONUMENTATION:           Tidal Station disk                    VM#:         1057
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  QE1114
SETTING CLASSIFICATION:  Concrete pier                         OPUS PID#: QE1114
LATITUDE:   44° 37.5' N (  44.62525)          LONGITUDE: 124°  2.7' W (-124.04528)


The primary bench mark is set in the top of the SW corner of the Oregon State
University Marine Science Center cement pier, 2.13 m (7.0 ft) west of the
centerline of the dock, 0.30 m (1 ft) north of the junction of the blacktop road
and the concrete pier, and 0.30 (1 ft) east of the west edge of the pier.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  8

                                                                                
Station ID: 9435380                         PUBLICATION DATE:  10/28/2015
Name:       SOUTH BEACH, YAQUINA RIVER                        
            OR
NOAA Chart: 18581                           Latitude:   44° 37.5' N (  44.62500)
USGS Quad:  NEWPORT SOUTH                   Longitude: 124°  2.6' W (-124.04300)


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


                         BENCH MARK STAMPING:  5380 G 1997
                         DESIGNATION:          943 5380 G

MONUMENTATION:           Tidal Station disk                    VM#:        13870
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete pad                          OPUS PID:        
LATITUDE:   44° 37.5' N (  44.62564)          LONGITUDE: 124°  2.7' W (-124.04486)


The bench mark is set flush in concrete pad supporting a large bollard on OSU
ship operations pier, 27.20 m (89.2 ft) NE of the NE corner of a 3-car garage
located on pier, 18.25 m (59.9 ft) north of the Aquatrak well of the tide gauge,
and 0.50 m (1.6 ft) east of the bollard.



                         BENCH MARK STAMPING:  5380 J 1997
                         DESIGNATION:          943 5380 J

MONUMENTATION:           Tidal Station disk                    VM#:        13872
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID#: BBCJ23
LATITUDE:   44° 37.3' N (  44.62092)          LONGITUDE: 124°  2.8' W (-124.04744)


The bench mark is east of the east entrance to the South Beach Marina, along the
section of OSU Drive running in the north/south direction, 10 m (33 ft) east of
center line of OSU Drive, 3.50 m (11.5 ft) NE of west post of a blue and white
"Newport Marina" sign along OSU Drive, and 0.70 m (2.3 ft) west of a NOS orange
fiberglass witness post and cyclone fence bordering the west side of the OSU
campus.  The bench mark is crimped to the top of a stainless steel rod driven to
a depth of 30.5 m (100 ft) to refusal.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  8

                                                                                
Station ID: 9435380                         PUBLICATION DATE:  10/28/2015
Name:       SOUTH BEACH, YAQUINA RIVER                        
            OR
NOAA Chart: 18581                           Latitude:   44° 37.5' N (  44.62500)
USGS Quad:  NEWPORT SOUTH                   Longitude: 124°  2.6' W (-124.04300)


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


                         BENCH MARK STAMPING:  5380 L 1997
                         DESIGNATION:          943 5380 L

MONUMENTATION:           Tidal Station disk                    VM#:        13874
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete bridge support               OPUS PID:        
LATITUDE:   44° 37.1' N (  44.61858)          LONGITUDE: 124°  3.1' W (-124.05231)


The bench mark is set flush in concrete support of the Yaquina Bridge (Highway
101) at the 5th pair of supports starting from the south end of the bridge, in
the NE corner of the easterly support, 18.20 m (59.7 ft) west of utility pole
No. FI7G-26, 10.40 m (34.1 ft) north of the center line of SW 26th Street, 0.22
m (0.7 ft) south of the edge of the bridge support, and 0.5 m (1.6 ft) above the
natural grade of the terrain.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  8

                                                                                
Station ID: 9435380                         PUBLICATION DATE:  10/28/2015
Name:       SOUTH BEACH, YAQUINA RIVER                        
            OR
NOAA Chart: 18581                           Latitude:   44° 37.5' N (  44.62500)
USGS Quad:  NEWPORT SOUTH                   Longitude: 124°  2.6' W (-124.04300)


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


                         BENCH MARK STAMPING:  Y2 1936
                         DESIGNATION:          Y2

MONUMENTATION:           Bench Mark disk                       VM#:        13875
AGENCY:                  National Ocean Service (NOS)          IDB PID#:  QE1111
SETTING CLASSIFICATION:  Concrete walkway                      OPUS PID:        
LATITUDE:   44° 37.1' N (  44.61789)          LONGITUDE: 124°  3.1' W (-124.05169)


The bench mark is a disk set in a concrete walkway at the south end and SW side
of the Yaquina Bay Bridge, 4.11 m (13.5 ft) SW of the centerline of U. S.
Highway 101, 1.22 m (4.0 ft) east of SE corner of 1.38 m x 1.07 m x 2.13 m (4.5
ft x 3.5 ft x 7.0 ft) concrete abutment, and 0.15 m (0.5 ft) from the edge of
the curb.



                         BENCH MARK STAMPING:  5380 M 2014
                         DESIGNATION:          943 5380 M

MONUMENTATION:           Bench Mark disk                       VM#:        21095
AGENCY:                  National Ocean Service                IDB PID#:        
SETTING CLASSIFICATION:  Concrete pad                          OPUS PID#: BBDV28
LATITUDE:   44° 37.5' N (  44.62528)          LONGITUDE: 124°  2.6' W (-124.04389)


The bench mark is a disk set flush in the concrete pad supporting a large
bollard on the E satellite platform of the OSU ship operations pier. The mark is
80 m (262.5 ft) SE of bench mark g, 29.3 m (96.1 ft) SE of the entrance to the
catwalk on the E edge of the pier, 2.8 m (9.2 ft) S of the center of the bollard
set in the center of the platform and 1.9 m (6.2 ft) N or the S corner of the
bollard platform.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  8

                                                                                
Station ID: 9435380                         PUBLICATION DATE:  10/28/2015
Name:       SOUTH BEACH, YAQUINA RIVER                        
            OR
NOAA Chart: 18581                           Latitude:   44° 37.5' N (  44.62500)
USGS Quad:  NEWPORT SOUTH                   Longitude: 124°  2.6' W (-124.04300)


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


                         BENCH MARK STAMPING:  5380 N 2014
                         DESIGNATION:          943 5380 N

MONUMENTATION:           Bench Mark disk                       VM#:        21096
AGENCY:                  National Ocean Service                IDB PID#:        
SETTING CLASSIFICATION:  Concrete bridge support               OPUS PID:        
LATITUDE:   44° 37.2' N (  44.61945)          LONGITUDE: 124°  3.2' W (-124.05361)


The bench mark is a disk set flush in the concrete support of the Yaquina bridge
(highway 101) at the 10th pair of supports starting from the S end of the
bridge. The mark is 74.5 m (244.4 ft) SW of red rogue brewery silo, 46.9 m
(153.9 ft) NW of the ninth pair of bridge supports, 44.6 m (146.3 ft) W of the
fish cleaning station and 3.5 m (11.5 ft) NE of the SW edge of the 10th bridge
support.



                         BENCH MARK STAMPING:  5380 P 2014
                         DESIGNATION:          943 5380 P

MONUMENTATION:           Bench Mark disk                       VM#:        21097
AGENCY:                  National Ocean Service                IDB PID#:        
SETTING CLASSIFICATION:  Concrete bridge support               OPUS PID:        
LATITUDE:   44° 37.1' N (  44.61889)          LONGITUDE: 124°  3.2' W (-124.05278)


The bench mark is a disk set flush in the concrete support of the Yaquina bridge
(highway 101) in the middle of the 8th pair of supports starting from the S end
of the bridge. The mark is 37.7 m (123.7 ft) SW of the fish cleaning station,
9.1 m (29.9 ft) NW of center line of SE marine science drive and 6.3 m (20.7 ft)
NE of SW edge of eighth set of bridge supports. The mark is 1.2 m (3.9 ft) above
ground level.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  8

                                                                                
Station ID: 9435380                         PUBLICATION DATE:  10/28/2015
Name:       SOUTH BEACH, YAQUINA RIVER                        
            OR
NOAA Chart: 18581                           Latitude:   44° 37.5' N (  44.62500)
USGS Quad:  NEWPORT SOUTH                   Longitude: 124°  2.6' W (-124.04300)


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


                         BENCH MARK STAMPING:  S 220 2011
                         DESIGNATION:          S 220

MONUMENTATION:           Bench Mark disk                       VM#:        21098
AGENCY:                  National Ocean Service                IDB PID#:        
SETTING CLASSIFICATION:  Concrete abutment                     OPUS PID#: BBCN88
LATITUDE:   44° 37.5' N (  44.62556)          LONGITUDE: 124°  2.9' W (-124.04833)


The bench mark is a disk set flush in the concrete curb on the SE corner of the
W approach to the NOAA pier, 29 cm (11 inches) above ground level. The mark is a
coast survey horizontal control mark 17.7 m (58.1 ft) SE of light post #b6, 5.1
m (16.7 ft) NW of the centerpoint of sewer manhole cover labeled with the letter
ESS. It is 3.8 m (12.5 ft) W of light post #16 which is next to a yellow fire
hydrant.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of  8

                                                                                
Station ID: 9435380                         PUBLICATION DATE:  10/28/2015
Name:       SOUTH BEACH, YAQUINA RIVER                        
            OR
NOAA Chart: 18581                           Latitude:   44° 37.5' N (  44.62500)
USGS Quad:  NEWPORT SOUTH                   Longitude: 124°  2.6' W (-124.04300)


                            T I D A L   D A T U M S 


Tidal datums at SOUTH BEACH, YAQUINA RIVER based on:

     LENGTH OF SERIES:      19 YEARS
     TIME PERIOD:           January 1983 - December 2001
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:   


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

     HIGHEST OBSERVED WATER LEVEL (12/11/1969)         =  3.790
     MEAN HIGHER HIGH WATER                     MHHW   =  2.543
     MEAN HIGH WATER                            MHW    =  2.331
     MEAN TIDE LEVEL                            MTL    =  1.376
     MEAN SEA LEVEL                             MSL    =  1.358
     MEAN LOW WATER                             MLW    =  0.421
     North American Vertical Datum              NAVD88 =  0.234
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (06/01/1973)         = -1.017

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METER above:

     Stamping or Designation                    MLLW        MHW

     C 590 1965                                  4.750    2.419
     5380 G 1997                                 4.567    2.236
     5380 J 1997                                 5.194    2.863
     5380 L 1997                                 7.754    5.423
     Y2 1936                                    16.028   13.697
     5380 M 2014                                 4.389    2.058
     5380 N 2014                                 5.966    3.635
     5380 P 2014                                 7.941    5.610
     S 220 2011                                  5.467    3.136


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

                                                                                
Station ID: 9435380                         PUBLICATION DATE:  10/28/2015
Name:       SOUTH BEACH, YAQUINA RIVER                        
            OR
NOAA Chart: 18581                           Latitude:   44° 37.5' N (  44.62500)
USGS Quad:  NEWPORT SOUTH                   Longitude: 124°  2.6' W (-124.04300)


                             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.