U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
Station ID: 8570280 PUBLICATION DATE: 06/13/2003
Name: OCEAN CITY, FISHING PIER
MD
NOAA Chart: 12211 Latitude: 38° 19.6' N ( 38.32670)
USGS Quad: OCEAN CITY Longitude: 75° 5.0' W ( -75.08330)
To reach the tidal bench marks from the junction of the east end of the U.S.
Highway 50 bridge and Philadelphia Avenue in Ocean City, proceed south on
Philadelphia Avenue for 0.3 km (0.2 mi) to Wicomico Street, turn left onto
Wicomico Street and continue east to the Ocean City Fishing Pier. The bench
marks are near the pier, on Dorchester Street, and at the U.S. Coast Guard
Station. The tide gage and electric tape gage were at the offshore end of the
pier.
T I D A L B E N C H M A R K S
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
Station ID: 8570280 PUBLICATION DATE: 06/13/2003
Name: OCEAN CITY, FISHING PIER
MD
NOAA Chart: 12211 Latitude: 38° 19.6' N ( 38.32670)
USGS Quad: OCEAN CITY Longitude: 75° 5.0' W ( -75.08330)
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: F 104 1962
DESIGNATION: F 104
MONUMENTATION: Bench Mark disk VM#: 402
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: HU0366
SETTING CLASSIFICATION: Brick wall OPUS PID:
LATITUDE: 38° 19.8' N ( 38.33000) LONGITUDE: 75° 5.3' W ( -75.08830)
The primary bench mark is a disk set vertically in the NE brick face of the
Police Department building on the south side of Dorchester Street between
Baltimore and Philadelphia Avenues, 7.25 m (23.8 ft) SW of the centerline of
Dorchester Street, 6.40 m (21.0 ft) NW of the centerline of the entrance to the
police building, 3.14 m (10.3 ft) SE of the centerline of a driveway, 0.30 m
(1.0 ft) SE of the NW corner of the building, and 0.67 m (2.2 ft) above the
ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 8570280 PUBLICATION DATE: 06/13/2003
Name: OCEAN CITY, FISHING PIER
MD
NOAA Chart: 12211 Latitude: 38° 19.6' N ( 38.32670)
USGS Quad: OCEAN CITY Longitude: 75° 5.0' W ( -75.08330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6 1931
DESIGNATION: TIDAL 6 STA 1
MONUMENTATION: Tidal Station disk VM#: 403
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: HU0267
SETTING CLASSIFICATION: Concrete chimney foundation OPUS PID:
LATITUDE: 38° 19.7' N ( 38.32830) LONGITUDE: 75° 5.2' W ( -75.08670)
The bench mark is a disk set flush in the NW corner of the concrete chimney
foundation for a four-story boarding house on the south side of Somerset Street
at Baltimore Avenue, 9.97 m (32.7 ft) SW of the centerline of Somerset Street,
1.80 m (5.9 ft) WSW of the NW corner of the house, 0.18 m (0.6 ft) NW of the NW
corner of the chimney, and 0.34 m (1.1 ft) above the ground.
BENCH MARK STAMPING: NO 2 1975
DESIGNATION: 857 0280 TIDAL 2
MONUMENTATION: Tidal Station disk VM#: 404
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete sidewalk OPUS PID:
LATITUDE: 38° 19.6' N ( 38.32670) LONGITUDE: 75° 5.0' W ( -75.08330)
The bench mark is a disk set in the concrete sidewalk on the south side of
Wicomico Street between Baltimore Avenue and the boardwalk, 40.23 m (132.0 ft)
ESE of the centerline of Baltimore Avenue, 5.24 m (17.2 ft) SSW of the
centerline of Wicomico Street, and 1.46 m (4.8 ft) east of the NE corner of the
Bearded Clam bar.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 8570280 PUBLICATION DATE: 06/13/2003
Name: OCEAN CITY, FISHING PIER
MD
NOAA Chart: 12211 Latitude: 38° 19.6' N ( 38.32670)
USGS Quad: OCEAN CITY Longitude: 75° 5.0' W ( -75.08330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0280 A 1978
DESIGNATION: 857 0280 A
MONUMENTATION: Tidal Station disk VM#: 405
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete loading ramp OPUS PID:
LATITUDE: 38° 19.6' N ( 38.32670) LONGITUDE: 75° 5.0' W ( -75.08330)
The bench mark is a disk located on the SW corner of the concrete loading ramp
at the east end of Wicomico Street, 20.21 m (66.3 ft) NW of the centerline of
the boardwalk, 4.66 m (15.3 ft) SW of the centerline of Wicomico Street, 2.96 m
(9.7 ft) north of the NE corner of Buds Deli and the NW corner of Dolles candy
shop, and 0.76 m (2.5 ft) above the ground.
BENCH MARK STAMPING: 0280 G 1978
DESIGNATION: 857 0280 G
MONUMENTATION: Tidal Station disk VM#: 406
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete pier deck OPUS PID:
LATITUDE: 38° 19.6' N ( 38.32670) LONGITUDE: 75° 5.0' W ( -75.08330)
The bench mark is a disk set flush in the concrete pier deck of the amusement
pier near the SW corner of a passageway to the boardwalk, 26.03 m (85.4 ft) east
of the centerline of the boardwalk, 22.34 m (73.3 ft) north of the north curb of
the parking lot, 3.05 m (10.0 ft) SSW of the centerline of the pier, and 0.34 m
(1.1 ft) SE of the bottom step to the second story of the pier.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
Station ID: 8570280 PUBLICATION DATE: 06/13/2003
Name: OCEAN CITY, FISHING PIER
MD
NOAA Chart: 12211 Latitude: 38° 19.6' N ( 38.32670)
USGS Quad: OCEAN CITY Longitude: 75° 5.0' W ( -75.08330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0280 H 1980
DESIGNATION: 857 0280 H
MONUMENTATION: Tidal Station disk VM#: 407
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 38° 19.6' N ( 38.32670) LONGITUDE: 75° 5.0' W ( -75.08330)
The bench mark is a disk located on the north side of the U.S. Coast Guard
Station on Worcester Street and Philadelphia Avenue, 40.26 m (132.1 ft) north of
the NW corner of the Coast Guard building, 9.14 m (30.0 ft) WNW of the
centerline of the drive to the Coast Guard station, 8.23 m (27.0 ft) SW of the
centerline of Worcester Street, 0.43 m (1.4 ft) SW of a concrete block wall, and
0.37 m (1.2 ft) east of the NE corner of a chain link fence. The bench mark is
crimped to a stainless steel rod driven 11.0 m (36 ft) to refusal, and encased
in a 4-inch PVC pipe and concrete kickblock.
BENCH MARK STAMPING: 0280 J 1982
DESIGNATION: 857 0280 J
MONUMENTATION: Tidal Station disk VM#: 408
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: DL8731
LATITUDE: 38° 19.6' N ( 38.32670) LONGITUDE: 75° 5.0' W ( -75.08330)
The bench mark is a disk located on the south side of the U.S. Coast Guard
Station, 28.65 m (94.0 ft) SSE of the east leg of a steel radio tower, 18.99 m
(62.3 ft) SSW of the SW corner of the Coast Guard barracks, 4.63 m (15.2 ft) NNE
of the SE corner of a chain link fence, 1.34 m (4.4 ft) WSW of the chain link
fence, and 0.37 m (1.2 ft) NNE of a wooden antenna pole. The bench mark is set 9
cm (0.3 ft) below ground, crimped to a stainless steel rod driven 12.8 m (42 ft)
to refusal, and encased in a 4-inch PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
Station ID: 8570280 PUBLICATION DATE: 06/13/2003
Name: OCEAN CITY, FISHING PIER
MD
NOAA Chart: 12211 Latitude: 38° 19.6' N ( 38.32670)
USGS Quad: OCEAN CITY Longitude: 75° 5.0' W ( -75.08330)
T I D A L D A T U M S
Tidal datums at OCEAN CITY, FISHING PIER based on:
LENGTH OF SERIES: 10 YEARS
TIME PERIOD: November 1981 - October 1991
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8557380 LEWES, FT. MILES
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (09/27/1985) = 2.216
MEAN HIGHER HIGH WATER MHHW = 1.187
MEAN HIGH WATER MHW = 1.073
North American Vertical Datum NAVD88 = 0.707
MEAN SEA LEVEL MSL = 0.567
MEAN TIDE LEVEL MTL = 0.561
MEAN LOW WATER MLW = 0.048
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (03/16/1980) = -0.963
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
F 104 1962 2.433 1.360
6 1931 2.890 1.817
NO 2 1975 2.536 1.463
0280 A 1978 3.945 2.872
0280 G 1978 4.035 2.962
0280 H 1980 2.264 1.191
0280 J 1982 2.731 1.658
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
Station ID: 8570280 PUBLICATION DATE: 06/13/2003
Name: OCEAN CITY, FISHING PIER
MD
NOAA Chart: 12211 Latitude: 38° 19.6' N ( 38.32670)
USGS Quad: OCEAN CITY Longitude: 75° 5.0' W ( -75.08330)
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.