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Bench Mark Sheet for 9433501, REEDSPORT

Superseded Epoch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Small blue map location marker Unpublished bench mark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  9

                                                                                
Station ID: 9433501                         PUBLICATION DATE:  03/07/2018
Name:       REEDSPORT                                         
            OR
NOAA Chart: 18584                           Latitude:   43° 42.3' N (  43.70500)
USGS Quad:  REEDSPORT                       Longitude: 124°  5.7' W (-124.09500)


To reach the bench marks from the intersection of US highway 101 and State
Highway 38 (Umpqua Avenue) in Reedsport, proceed southeast on Umpqua Avenue
southeast for 0.9 km (0.6 mi) to Riverfront Way, take a sharp left and proceed
0.3 km (0.2 mi) to the entrance to the Umpqua Discovery Center. The bench marks
are located at the Discovery Center, along Riverfront Way and along US Highway
101, the tide gauge is located on the Discovery Center dock.


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


                 PRIMARY BENCH MARK STAMPING:  3501 A 2017
                         DESIGNATION:          943 3501 A

MONUMENTATION:           Tidal Station disk                    VM#:        22285
AGENCY:                  NOS                                   IDB PID#:        
SETTING CLASSIFICATION:  Floodwall                             OPUS PID#: BBFP75
LATITUDE:   43° 42.2' N (  43.70358)          LONGITUDE: 124°  5.7' W (-124.09425)


The primary bench mark is a disk set in a floodwall, 28.81 m (94.5 ft) south of
the southwest corner of a warehouse building, 25.87 m (84.9 ft) SE of west end
of floodwall at Gate 4, 18.57 m (60.9 ft) SSE of a stop sign at the corner of
Water and River Front Way, 2.92 m (9.6 ft) SE of concrete floodwall break, 0.52
m (1.7 ft) WSE of edge of pavement of River Front Way and 0.6 m (2.0 ft) above
grade.

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

                                                                                
Station ID: 9433501                         PUBLICATION DATE:  03/07/2018
Name:       REEDSPORT                                         
            OR
NOAA Chart: 18584                           Latitude:   43° 42.3' N (  43.70500)
USGS Quad:  REEDSPORT                       Longitude: 124°  5.7' W (-124.09500)


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


                         BENCH MARK STAMPING:  RAMP 1973
                         DESIGNATION:          RAMP

MONUMENTATION:           Bench Mark disk                       VM#:        22286
AGENCY:                  USACE                                 IDB PID#:        
SETTING CLASSIFICATION:  Boat ramp                             OPUS PID:        
LATITUDE:   43° 42.3' N (  43.70464)          LONGITUDE: 124°  5.7' W (-124.09469)


The bench mark is a disk set in a concrete boat launch ramp, 26.55 m (87.1 ft)
east of the NE corner of a restaurant building, 12.00 m (39.4 ft) ESE of a wood
sculpture of Steve Hanson holding a sturgeon, 6.16 m (20.2 ft) NNE of 30 mc (12
inch) diameter sewer drain, 3.26 m (10.7 ft) SSW of utility pole 118916, and
0.30 m (1.0 ft) northeast of the southwest corner of the ramp.

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

                                                                                
Station ID: 9433501                         PUBLICATION DATE:  03/07/2018
Name:       REEDSPORT                                         
            OR
NOAA Chart: 18584                           Latitude:   43° 42.3' N (  43.70500)
USGS Quad:  REEDSPORT                       Longitude: 124°  5.7' W (-124.09500)


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


                         BENCH MARK STAMPING:  PATRICK 1998
                         DESIGNATION:          PATRICK

MONUMENTATION:           Bench Mark disk                       VM#:        22287
AGENCY:                  Douglas County Oregon                 IDB PID#:        
SETTING CLASSIFICATION:  Curb                                  OPUS PID:        
LATITUDE:   43° 42.3' N (  43.70519)          LONGITUDE: 124°  5.7' W (-124.09558)


The bench mark is a disk set in a curb, 46.42 m (152.3 ft) NE of the centerline
of river front street, 14.64 m (48.0 ft) WNW of northwest building corner of the
discovery center, 7.60 m (24.9 ft) north of utility pole number 118935, 4.49 m
(14.7 ft) ESE of southeast building corner of the Schooner Cafe, and 0.80 m (2.6
ft) WNW of the edge of the curb at a crack.

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

                                                                                
Station ID: 9433501                         PUBLICATION DATE:  03/07/2018
Name:       REEDSPORT                                         
            OR
NOAA Chart: 18584                           Latitude:   43° 42.3' N (  43.70500)
USGS Quad:  REEDSPORT                       Longitude: 124°  5.7' W (-124.09500)


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


                         BENCH MARK STAMPING:  REED 1989
                         DESIGNATION:          REED

MONUMENTATION:           Survey disk                           VM#:        22288
AGENCY:                  Oregon Dept of Transportaiton         IDB PID#:  OA1622
SETTING CLASSIFICATION:  Curb                                  OPUS PID:        
LATITUDE:   43° 42.2' N (  43.70314)          LONGITUDE: 124°  5.3' W (-124.08789)


The bench mark is a disk set in a concrete monument near the east end of a
triangle shaped traffic island, 53.23 m (174.6 ft) SE of utility pole at the SW
corner of the intersection of US Highway 101 and Umpqua avenue, 10.14 m (33.3
ft) SSW of the centerline of highway 38, 6.43 m (21.1 ft) SE of reference
monument on north curb of Highway 38, 4.66 m (15.3 ft) NNE of reference monument
on south curb of Highway 38 entrance ramp and 1.70 m (5.6 ft) north of a stop
sign.

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

                                                                                
Station ID: 9433501                         PUBLICATION DATE:  03/07/2018
Name:       REEDSPORT                                         
            OR
NOAA Chart: 18584                           Latitude:   43° 42.3' N (  43.70500)
USGS Quad:  REEDSPORT                       Longitude: 124°  5.7' W (-124.09500)


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


                         BENCH MARK STAMPING:  G 755 1988
                         DESIGNATION:          G 755

MONUMENTATION:           Flange-encased Rod                    VM#:        22289
AGENCY:                  NOS                                   IDB PID#:  OA0683
SETTING CLASSIFICATION:  Stainless steel rod without sleeve    OPUS PID:        
LATITUDE:   43° 42.1' N (  43.70133)          LONGITUDE: 124°  6.4' W (-124.10744)


The bench mark is a flange encased rod set at the southwest corner of the
intersection between US Highway 101 and 11th St, 21.40 m (70.2 ft) SE of the
centerline of US Highway 101, 9.95 m (32.6 ft) NE of the GTE manhole cover on
sidewalk of US Highway 101, 1.56 m (5.1 ft) south of 11th St edge of pavement,
0.90 m (3.0 ft) east of a utility pole numbered 119185, and 0.28 m (0.9 ft)
north of an Oregon Department of Transportation witness post. The datum point is
set 2 cm (1 inch) below grade being the top of a stainless steel rod encased in
a 5-inch National Geodetic Survey logo cap.

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

                                                                                
Station ID: 9433501                         PUBLICATION DATE:  03/07/2018
Name:       REEDSPORT                                         
            OR
NOAA Chart: 18584                           Latitude:   43° 42.3' N (  43.70500)
USGS Quad:  REEDSPORT                       Longitude: 124°  5.7' W (-124.09500)


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


                         BENCH MARK STAMPING:  NORTH BASE 1 22 1934
                         DESIGNATION:          NORTH BASE 1

MONUMENTATION:           Bench Mark disk                       VM#:        22290
AGENCY:                  Oregon Highway Department             IDB PID#:  OA0326
SETTING CLASSIFICATION:  Abutment                              OPUS PID:        
LATITUDE:   43° 42.4' N (  43.70625)          LONGITUDE: 124°  5.8' W (-124.09714)


The bench mark is a disk set in the west sidewall of the bridge over the Umpqua
river, 18.72 m (61.4 ft) NE of south end of a walkway, 1.34 m (4.4 ft) NW of the
centerline of west track, 0.85 m (2.8 ft) SE of west side wall end and 0.20 m
(0.7 ft) below the top of tracks.

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

                                                                                
Station ID: 9433501                         PUBLICATION DATE:  03/07/2018
Name:       REEDSPORT                                         
            OR
NOAA Chart: 18584                           Latitude:   43° 42.3' N (  43.70500)
USGS Quad:  REEDSPORT                       Longitude: 124°  5.7' W (-124.09500)


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


                         BENCH MARK STAMPING:  B 56 1930
                         DESIGNATION:          B 56

MONUMENTATION:           Bench Mark disk                       VM#:        22291
AGENCY:                  CGS                                   IDB PID#:  OA0324
SETTING CLASSIFICATION:  Abutment                              OPUS PID:        
LATITUDE:   43° 42.4' N (  43.70625)          LONGITUDE: 124°  5.8' W (-124.09711)


The bench mark is a disk set in the south bridge wing wall abutment of a the
rail bridge crossing the Umpqua river, 18.9 m (62.0 ft) NE of the end of
walkway, 3.10 m (10.2 ft) SE of east rail, 0.18 m (0.6 ft) NW of bench mark
45.003 and 1.89 m (6.2 ft) below the bridge walkway decking.



                         BENCH MARK STAMPING:  45.003
                         DESIGNATION:          45.003

MONUMENTATION:           Bolt                                  VM#:        22292
AGENCY:                                                        IDB PID#:  OA0325
SETTING CLASSIFICATION:  Abutment                              OPUS PID:        
LATITUDE:   43° 42.4' N (  43.70619)          LONGITUDE: 124°  5.8' W (-124.09708)


The bench mark is a bolt set in the south bridge wing wall abutment of the rail
bridge crossing the Umpqua river, 18.9 m (62.0 ft) NE of end of walkway, 3.42 m
(11.2 ft) SSE of southeast rail, 0.32 m (1.0 ft) SSE of bench mark B56 and 1.89
m (6.2 ft) below the bridge walkway decking.

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

                                                                                
Station ID: 9433501                         PUBLICATION DATE:  03/07/2018
Name:       REEDSPORT                                         
            OR
NOAA Chart: 18584                           Latitude:   43° 42.3' N (  43.70500)
USGS Quad:  REEDSPORT                       Longitude: 124°  5.7' W (-124.09500)


                            T I D A L   D A T U M S 


Tidal datums at REEDSPORT based on:

     LENGTH OF SERIES:      5 MONTHS
     TIME PERIOD:           May 2017 - September 2017
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  9432780 CHARLESTON, COOS BAY


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

     MEAN HIGHER HIGH WATER                     MHHW   =  2.262
     MEAN HIGH WATER                            MHW    =  2.062
     MEAN SEA LEVEL                             MSL    =  1.204
     MEAN TIDE LEVEL                            MTL    =  1.201
     MEAN LOW WATER                             MLW    =  0.340
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     North American Vertical Datum              NAVD88 = -0.022

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     3501 A 2017                                 5.724    3.662
     RAMP 1973                                   3.459    1.397
     PATRICK 1998                                4.384    2.322
     REED 1989                                   3.503    1.441
     G 755 1988                                  3.392    1.330
     NORTH BASE 1 22 1934                        7.942    5.880
     B 56 1930                                   6.042    3.980
     45.003                                      6.024    3.962


Foot Notes:

Bench marks 45.003, B 56 1930 and North Base 1 22 1934 are based on one
differential leveling connection and do not meet the quality control standards
of the NOS. Therefore, caution should be used when deriving elevations for these
marks.

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

                                                                                
Station ID: 9433501                         PUBLICATION DATE:  03/07/2018
Name:       REEDSPORT                                         
            OR
NOAA Chart: 18584                           Latitude:   43° 42.3' N (  43.70500)
USGS Quad:  REEDSPORT                       Longitude: 124°  5.7' W (-124.09500)


                             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 9433501 REEDSPORT,

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