Bench Mark Sheet for 8639219, SOUTH END, LAKE RUDEE VA

Superseded Epoch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Small blue map location marker Unpublished bench mark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  5

                                                                                
Station ID: 8639219                         PUBLICATION DATE:  07/02/2003
Name:       SOUTH END, LAKE RUDEE                             
            VA
NOAA Chart: 12207                           Latitude:   36° 49.5' N (  36.82500)
USGS Quad:  VIRGINIA BEACH                  Longitude:  75° 58.9' W ( -75.98170)


To reach the tidal bench marks from the south end of the bridge over Rudee Inlet
in Virginia Beach, proceed south on General Booth Boulevard for 1.05 km (0.65
mi) to the entrance of Owl Creek Municipal Boat Ramp.  The bench marks are in
the vicinity of Owl Creek Municipal Boat Ramp and the bridge over Rudee Inlet. 
The tide gage and staff were on the end of the westernmost wood pier.


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


                 PRIMARY BENCH MARK STAMPING:  9219 A 1984
                         DESIGNATION:          863 9219 A

MONUMENTATION:           Tidal Station disk                    VM#:         3522
AGENCY:                  National Ocean Service (NOS) 
        IDB PID#:        
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   36° 49.4' N (  36.82330)          LONGITUDE:  75° 58.9' W ( -75.98170)


The primary bench mark is a disk set in a concrete monument on the south side of
the Owl Creek Municipal Boat Ramp parking lot, near the NW corner of the boat
ramp, 18 m (59 ft) NNE of the SW corner piling of the westernmost wood pier,
11.8 m (38.7 ft) NW of the SE corner piling of the westernmost wood pier, 0.3 m
(1 ft) west of the west edge of a concrete walk, and 0.1 m (0.3 ft) below ground
level.



                         BENCH MARK STAMPING:  F 311 RESET 1967
                         DESIGNATION:          863 9219 F 311 RESET 1967

MONUMENTATION:           Bench Mark disk                       VM#:         3519
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  FW0085
SETTING CLASSIFICATION:  Bridge wing wall                      OPUS PID:        
LATITUDE:   36° 49.8' N (  36.83000)          LONGITUDE:  75° 58.4' W ( -75.97330)


The bench mark is a disk set flush in a bridge wing wall at the SE end of Rudee
Inlet Bridge, and 1.07 m (3.5 ft) above the level of the bridge floor.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  5

                                                                                
Station ID: 8639219                         PUBLICATION DATE:  07/02/2003
Name:       SOUTH END, LAKE RUDEE                             
            VA
NOAA Chart: 12207                           Latitude:   36° 49.5' N (  36.82500)
USGS Quad:  VIRGINIA BEACH                  Longitude:  75° 58.9' W ( -75.98170)


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


                         BENCH MARK STAMPING:  NO 6 1967
                         DESIGNATION:          863 9219 TIDAL 6

MONUMENTATION:           Tidal Station disk                    VM#:         3520
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  FW0086
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   36° 49.2' N (  36.82000)          LONGITUDE:  75° 58.9' W ( -75.98170)


The bench mark is a disk set on top of a concrete monument on the NE side of
Rudee Inlet Bridge, 2.90 m (9.5 ft) SW of a 0.2 m (0.5 ft) diameter pine tree,
and 0.61 m (2.0 ft) east of the edge of the roadway.



                         BENCH MARK STAMPING:  9219 B 1984
                         DESIGNATION:          863 9219 B

MONUMENTATION:           Tidal Station disk                    VM#:         3523
AGENCY:                  National Ocean Service (NOS) 
        IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   36° 49.4' N (  36.82330)          LONGITUDE:  75° 58.9' W ( -75.98170)


The bench mark is a disk set on the south side of the Owl Creek Municipal Boat
Ramp parking lot in a small marshy area, 28.65 m (94.0 ft) NW of the NW corner
of the westernmost wood pier, 24.38 m (80.0 ft) NW of the NW corner of the boat
ramp, 24.08 m (79.0 ft) NW of bench mark 9219 A 1984, 9.75 m (32.0 ft) south of
the south edge of the parking lot, and 6.10 m (20.0 ft) west of the west edge of
the parking lot.  The bench mark crimped to the top of a stainless steel rod
driven 12.2 m (40 ft), and encased in a PVC pipe and concrete kickblock.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  5

                                                                                
Station ID: 8639219                         PUBLICATION DATE:  07/02/2003
Name:       SOUTH END, LAKE RUDEE                             
            VA
NOAA Chart: 12207                           Latitude:   36° 49.5' N (  36.82500)
USGS Quad:  VIRGINIA BEACH                  Longitude:  75° 58.9' W ( -75.98170)


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


                         BENCH MARK STAMPING:  9219 E 1984
                         DESIGNATION:          863 9219 E

MONUMENTATION:           Tidal Station disk                    VM#:         3526
AGENCY:                  National Ocean Service (NOS) 
        IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   36° 49.4' N (  36.82330)          LONGITUDE:  75° 58.9' W ( -75.98170)


The bench mark is a disk set on the north side of the Owl Creek Municipal Boat
Ramp parking lot on the edge of a marshy area, 18.59 m (61.0 ft) NE of a 0.1 m
(0.3 ft) diameter pine tree, and 10.88 m (35.7 ft) north of the north edge of
the parking lot.  The bench mark is crimped to the top of a stainless steel rod
driven 12.2 m (40 ft), and encased in a PVC pipe and concrete kickblock.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  5

                                                                                
Station ID: 8639219                         PUBLICATION DATE:  07/02/2003
Name:       SOUTH END, LAKE RUDEE                             
            VA
NOAA Chart: 12207                           Latitude:   36° 49.5' N (  36.82500)
USGS Quad:  VIRGINIA BEACH                  Longitude:  75° 58.9' W ( -75.98170)


                            T I D A L   D A T U M S 


Tidal datums at SOUTH END, LAKE RUDEE based on:

     LENGTH OF SERIES:      4 MONTHS
     TIME PERIOD:           March 1984 - June 1984
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8638610 SEWELLS POINT, HAMPTON ROADS


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

     MEAN HIGHER HIGH WATER                     MHHW   =  1.182
     MEAN HIGH WATER                            MHW    =  1.079
     North American Vertical Datum              NAVD88 =  0.711
     MEAN SEA LEVEL                             MSL    =  0.569
     MEAN TIDE LEVEL                            MTL    =  0.563
     MEAN LOW WATER                             MLW    =  0.046
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     9219 A 1984                                 1.489    0.410
     F 311 RESET 1967                           11.464   10.385
     NO 6 1967                                   7.998    6.919
     9219 B 1984                                 1.903    0.824
     9219 E 1984                                 1.971    0.892


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

                                                                                
Station ID: 8639219                         PUBLICATION DATE:  07/02/2003
Name:       SOUTH END, LAKE RUDEE                             
            VA
NOAA Chart: 12207                           Latitude:   36° 49.5' N (  36.82500)
USGS Quad:  VIRGINIA BEACH                  Longitude:  75° 58.9' W ( -75.98170)


                             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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