U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 8
Station ID: 8638489 PUBLICATION DATE: 01/06/2004
Name: PUDDLEDOCK SAND & GRAVEL, APPOMATTOX R.
VA
NOAA Chart: 12251 Latitude: 37° 16.0' N ( 37.26670)
USGS Quad: HOPEWELL Longitude: 77° 22.3' W ( -77.37170)
To reach the tidal bench marks from the entrance to the Camp Lee Federal
Reformatory on State Route 645, proceed 3.78 km (2.35 mi) south on State Route
645, then continue 1.6 km (1.0 mi) SW on Puddledock Road, then 0.2 km (0.1 mi)
south on Puddledock Road, then 0.6 km (0.4 mi) west on Fine Street (State Route
684) to its end, then 0.2 km (0.1 mi) north and 0.2 km (0.1 mi) west along the
entrance road to the Appomattox Small Boat Harbor. The bench marks are located
at the boat harbor, along Puddledock Road, and within the property of Vulcan
Sand and Gravel Company and Puddledock Sand and Gravel Company. The tide gauge
was located on pier at the small boat harbor.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 8489-A 1978
DESIGNATION: 863 8489 A
MONUMENTATION: Tidal Station disk VM#: 17193
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Conveyor pad OPUS PID:
LATITUDE: 37° 16.0' N ( 37.26670) LONGITUDE: 77° 22.3' W ( -77.37170)
The bench mark is a disk set on a concrete conveyor pad west of an office and
radio tower at the plant entrance, 7.19 m (23.6ft) SW of the SW corner of a wood
building on the dock, 6.61 m (21.7 ft) SE of the SE corner of a wooden shed,
6.19 m (20.3 ft) NE of the SE end of the iron retaining wall, and 0.15 m (0.5
ft) NW of the SE edge of the concrete.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 8
Station ID: 8638489 PUBLICATION DATE: 01/06/2004
Name: PUDDLEDOCK SAND & GRAVEL, APPOMATTOX R.
VA
NOAA Chart: 12251 Latitude: 37° 16.0' N ( 37.26670)
USGS Quad: HOPEWELL Longitude: 77° 22.3' W ( -77.37170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 8489-E 1978
DESIGNATION: 863 8489 E
MONUMENTATION: Tidal Station disk VM#: 17194
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Radio tower foundation OPUS PID:
LATITUDE: 37° 15.8' N ( 37.26330) LONGITUDE: 77° 21.8' W ( -77.36330)
The bench mark is a disk set in the concrete pad of a radio tower, NW of the
plant entrance on the north side of the the dirt road, 37.5 m (123.0 ft) east of
a power pole (with a meter and camera attached), 10.30 m (33.8 ft) SW of the SW
edge of the scale foundation, and 1.31 m (4.3 ft) south of the center of the
radio tower, and 0.20 m (.7 ft) below the surface grade.
BENCH MARK STAMPING: 8469 F 2003
DESIGNATION: 863 8489 F
MONUMENTATION: Flange-encased Rod VM#: 17195
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID:
LATITUDE: 37° 15.4' N ( 37.25670) LONGITUDE: 77° 22.4' W ( -77.37330)
The bench mark is a flang-encased rod located in the lawn of 1602 Fine Street,
36.91 m (121.1 ft) NW of power pole AE89, 11.89 m ( 39.0 ft) NE of the NE corner
of the one-story residence located at 1602 Fine Street, and 3.30 m (10.8 ft)
south of the south edge of the pavement. The datum point is 10 cm (0.3 ft)
below ground, being the top of the stainless steel rod driven 24.4 m (80 ft) in
a sleeve extending to a depth of 0.91 m (3.0 ft), and encased in a NOS logo
cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 8
Station ID: 8638489 PUBLICATION DATE: 01/06/2004
Name: PUDDLEDOCK SAND & GRAVEL, APPOMATTOX R.
VA
NOAA Chart: 12251 Latitude: 37° 16.0' N ( 37.26670)
USGS Quad: HOPEWELL Longitude: 77° 22.3' W ( -77.37170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 8469 G 2003
DESIGNATION: 863 8489 G
MONUMENTATION: Flange-encased Rod VM#: 17196
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID:
LATITUDE: 37° 15.5' N ( 37.25830) LONGITUDE: 77° 21.8' W ( -77.36330)
The bench mark is a flange-encased rod located along the entrance to The Vulcan
Sand and Gravel Company on the west side of the road, 48.89 m (160.4 ft) SSW of
power pole 1054G and 24.29 m (79.69 ft) NW of power pole 1054F. The bench mark
is set 10 m (0.3 ft) below ground, crimped to a stainless steel rod driven 17.0
m (56 ft) to refusal, in a sleeve extending 0.91 m (3.0 ft), and encased in a
NOS logo cap.
BENCH MARK STAMPING: 8469 H 2003
DESIGNATION: 863 8489 H
MONUMENTATION: Flange-encased Rod VM#: 17197
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID:
LATITUDE: 37° 15.4' N ( 37.25670) LONGITUDE: 77° 21.9' W ( -77.36500)
The bench mark is a flange-encased rod at the NE corner of the intersection of
Puddledock Road with the entrance to Vulcan Sand and Gravel Company, 19.81 m
(65.0 ft) north of power pole GE54, 7.10 m (23.3 ft) NW of a large Vulcan Sign (
made of stone), and 2.71 m (8.9 ft) east of the edge of the pavement. The datum
point is 10 m (0.3 ft) below ground, being the top of a stainless steel rod
driven 24.4 m (80 ft), in a sleeve extending 0.91 m (3.0 ft), and encased in a
NOS logo cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 8
Station ID: 8638489 PUBLICATION DATE: 01/06/2004
Name: PUDDLEDOCK SAND & GRAVEL, APPOMATTOX R.
VA
NOAA Chart: 12251 Latitude: 37° 16.0' N ( 37.26670)
USGS Quad: HOPEWELL Longitude: 77° 22.3' W ( -77.37170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: RV 80 N AND W RY
DESIGNATION: RV 80 NWRR
MONUMENTATION: Rivet VM#: 17325
AGENCY: Norfolk and Western Railroad (NWRR) IDB PID#: GV1938
SETTING CLASSIFICATION: Abutment OPUS PID:
LATITUDE: 37° 14.2' N ( 37.23670) LONGITUDE: 77° 23.1' W ( -77.38500)
The bench mark is a rivet set in top of the SW end of the NW abutment, SE of
Union Station at Bridge NO.25 over State Highway 36, 3.29 m (10.8 ft) SE of the
NW end of the wing wall of the abutment, 1.74 m (5.7 ft) SW of th SW rail, and
0.22 m (0.2 ft) NE of the SW edge of the 17-inch wide wing wall of the abutment.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 8
Station ID: 8638489 PUBLICATION DATE: 01/06/2004
Name: PUDDLEDOCK SAND & GRAVEL, APPOMATTOX R.
VA
NOAA Chart: 12251 Latitude: 37° 16.0' N ( 37.26670)
USGS Quad: HOPEWELL Longitude: 77° 22.3' W ( -77.37170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: U 380 1959
DESIGNATION: U 380
MONUMENTATION: Bench Mark disk VM#: 17358
AGENCY: US Coast & Geodetic Survey
(USC&GS) IDB PID#: GV1855
SETTING CLASSIFICATION: Abutment OPUS PID:
LATITUDE: 37° 13.9' N ( 37.23170) LONGITUDE: 77° 23.8' W ( -77.39670)
The bench mark is set in top of the south wing wall of the east abutment of the
Bank Street Bridge over a stream, 9.45 m (31.0 ft) west of the west edge of
Interstate Highway 95 overpass over Bank Street, 2.44 m (8.01 ft) south of the
douth curb line of Bank Street, 0.15 m (0.5 ft) north of the south end of the
wing wall, and about 0.15 m (0.5 ft) about the level of Bank Street.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 8
Station ID: 8638489 PUBLICATION DATE: 01/06/2004
Name: PUDDLEDOCK SAND & GRAVEL, APPOMATTOX R.
VA
NOAA Chart: 12251 Latitude: 37° 16.0' N ( 37.26670)
USGS Quad: HOPEWELL Longitude: 77° 22.3' W ( -77.37170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 86.562 J 49 1934 1941
DESIGNATION: J 49
MONUMENTATION: Bench Mark disk VM#: 17359
AGENCY: US Coast & Geodetic Survey
(USC&GS) IDB PID#: GV1978
SETTING CLASSIFICATION: Abutment curb OPUS PID:
LATITUDE: 37° 13.7' N ( 37.22830) LONGITUDE: 77° 25.1' W ( -77.41830)
The bench mark is a disk set in the top of the NW curbing of the SW concrete
abutment of the Seaboard Air Line railway overpass over High Street, 19.51 m
(64.0 ft) SW of a fire hydrant, 15.76 (51.7 ft) of pole No. 148A, 3.44 m (11.3
ft) NW of the NW rail and about 0.23 m (0.8 ft) above the level of the track.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 8
Station ID: 8638489 PUBLICATION DATE: 01/06/2004
Name: PUDDLEDOCK SAND & GRAVEL, APPOMATTOX R.
VA
NOAA Chart: 12251 Latitude: 37° 16.0' N ( 37.26670)
USGS Quad: HOPEWELL Longitude: 77° 22.3' W ( -77.37170)
T I D A L D A T U M S
Tidal datums at PUDDLEDOCK SAND & GRAVEL, APPOMATTOX R. based on:
LENGTH OF SERIES: 2 MONTHS
TIME PERIOD: August 2003 - September 2003
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8638433 SCOTLAND, JAMES RIVER
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.966
MEAN HIGH WATER MHW = 0.899
North American Vertical Datum NAVD88 = 0.560
MEAN SEA LEVEL MSL = 0.523
MEAN TIDE LEVEL MTL = 0.473
MEAN LOW WATER MLW = 0.047
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
8489-A 1978 2.947 2.048
8489-E 1978 9.343 8.443
8469 F 2003 6.480 5.581
8469 G 2003 11.086 10.187
8469 H 2003 10.403 9.504
RV 80 N AND W RY 12.356 11.456
U 380 1959 4.589 3.689
86.562 J 49 1934 1941 26.591 25.691
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 8
Station ID: 8638489 PUBLICATION DATE: 01/06/2004
Name: PUDDLEDOCK SAND & GRAVEL, APPOMATTOX R.
VA
NOAA Chart: 12251 Latitude: 37° 16.0' N ( 37.26670)
USGS Quad: HOPEWELL Longitude: 77° 22.3' W ( -77.37170)
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.