U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
Station ID: 8513398 PUBLICATION DATE: 04/17/2014
Name: MORICHES INLET (OPEN COAST)
NY
NOAA Chart: 12352 Latitude: 40° 45.9' N ( 40.76442)
USGS Quad: MORICHES Longitude: 72° 45.4' W ( -72.75597)
To reach the tide station from the south side of the traffic circle on William
Floyd Parkway south of the Smith Point Bridge to Fire Island National Seashore,
proceed ENE on William Floyd Parkway 0.9 km (0.5 mi) to the end of the asphalt
road and the gatehouse for 4 wheel drive beach access, continue ENE 0.6 km (0.4
mi) on the sand track onto the sand beach, continue ENE 5.0 km (3.1 mi) on the
beach to a sand ramp off of the beach to the sand track behind the dunes,
continue ENE on the sand track 3.5 km (2.2 mi) to the end of the sand track and
Moriches Inlet channel, turn right and proceed south 0.2 km (0.1 mi) to the edge
of the vegetation along the sand berm and a row of large rocks preventing
vehicle access to the beach. The tide gauge enclosure is among the large rocks
on top of the sand berm and the orifice is 80 m (250 ft) east bolted to the rock
jetty. The tidal bench marks are along the rock jetty and also near the end of
the sand track access road.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 3398 D 2013
DESIGNATION: 851 3398 D
MONUMENTATION: Flange-encased Rod VM#: 20923
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID:
LATITUDE: 40° 46.0' N ( 40.76650) LONGITUDE: 72° 45.4' W ( -72.75614)
The primary bench mark is a flange-encased rod located in a sand and grass
median at the end of the sand track road leading to Moriches Inlet, 69.95 m
(229.5 ft) S of bench mark 851 3398 C, 68.15 m (223.59 ft) NE of bench mark 851
3398 E, 44.40 m (145.7 ft) WNW of the eastern (offshore) edge of the rock
revetment along the channel, 27.11 m (88.9 ft) ENE of the centerline of the sand
track road leading to Moriches Inlet where it forks to the N and S, and 0.56 m
(1.8 ft) SW of an orange carsonite witness post. The datum point is set 12 cm
(0.4 ft) below ground, being the top of a stainless steel rod driven 28.0 m (92
ft) to substantial resistance, in a sleeve extending to a depth of 0.9 m (3 ft)
and encased in a 5-inch NOS logo cap with concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
Station ID: 8513398 PUBLICATION DATE: 04/17/2014
Name: MORICHES INLET (OPEN COAST)
NY
NOAA Chart: 12352 Latitude: 40° 45.9' N ( 40.76442)
USGS Quad: MORICHES Longitude: 72° 45.4' W ( -72.75597)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 3398 A 2013
DESIGNATION: 851 3398 A
MONUMENTATION: Bench Mark disk VM#: 20924
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: Boulder OPUS PID:
LATITUDE: 40° 45.9' N ( 40.76494) LONGITUDE: 72° 45.4' W ( -72.75606)
The bench mark is a disk set flush in a 1.8 m x 2.0 m x 1.3 m (6 ft x 7 ft x 4
ft) boulder on the W edge of the rock revetment along the W bank of the Moriches
Inlet channel, 46.72 m (153.3 ft) ENE of the trees on the sand berm near the W
end of the line of boulders blocking vehicle access to the beach, 43.90 m (144.0
ft) of the E end of the large boulders blocking vehicle access to beach, 32.70 m
(107.2 ft) E of the N S sand vehicle track along the channel, and 4.35 m (14.3
ft) W of the E side of the top of the rock revetment.
BENCH MARK STAMPING: 3398 B 2013
DESIGNATION: 851 3398 B
MONUMENTATION: Bench Mark disk VM#: 20925
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: Boulder OPUS PID:
LATITUDE: 40° 46.0' N ( 40.76731) LONGITUDE: 72° 45.3' W ( -72.75519)
The bench mark is a disk set flush in a 2.0 m x 2.5 m x 1.0 m (7 ft x 8 ft x 3
ft) boulder on the W edge of the rock revetment along the W bank of the Moriches
Inlet channel, 73.95 m (242.6 ft) S of bench mark W MORICHES 1 RM 2, 66.50 m
(218.2 ft) ESE of bench mark 851 3398 B, 23.10 m (75.8 ft) ESE of the centerline
of the N S sand vehicle track, and 4.19 m (13.7 ft) W of the E side of the top
of the rock revetment.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 8513398 PUBLICATION DATE: 04/17/2014
Name: MORICHES INLET (OPEN COAST)
NY
NOAA Chart: 12352 Latitude: 40° 45.9' N ( 40.76442)
USGS Quad: MORICHES Longitude: 72° 45.4' W ( -72.75597)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 3398 C 2013
DESIGNATION: 851 3398 C
MONUMENTATION: Flange-encased Rod VM#: 20926
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID:
LATITUDE: 40° 46.0' N ( 40.76711) LONGITUDE: 72° 45.4' W ( -72.75594)
The bench mark is a flange-encased rod located at the edge of the brush line on
the W side of Moriches Inlet, 66.50 m (218.2 ft) WSW of bench mark 851 3398 B,
48.40 m (158.8 ft) WNW of the western landward edge of the rock revetment, 16.66
m (54.6 ft) WNW of the N S sand vehicle track, 0.74 m (2.4 ft) S of an orange
carsonite witness post, and 0.45 m (1.5 ft) N of the brush line. The datum
point is set 15 cm (0.5 ft) below ground, being the top of a stainless steel rod
driven 28.0 m (92 ft) to substantial resistance, in a sleeve extending to a
depth of 0.9 m (3 ft) and encased in a 5-inch NOS logo cap with concrete
kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 8513398 PUBLICATION DATE: 04/17/2014
Name: MORICHES INLET (OPEN COAST)
NY
NOAA Chart: 12352 Latitude: 40° 45.9' N ( 40.76442)
USGS Quad: MORICHES Longitude: 72° 45.4' W ( -72.75597)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 3398 E 2013
DESIGNATION: 851 3398 E
MONUMENTATION: Flange-encased Rod VM#: 20927
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID#: BBDG79
LATITUDE: 40° 46.0' N ( 40.76619) LONGITUDE: 72° 45.4' W ( -72.75683)
The bench mark is a flange-encased rod set in a clearing on the S side of the
sand vehicle track leading to Moriches Inlet, 68.15 m (223.6 ft) WSW of bench
mark 851 3398 D, 36.20 m (118.8 ft) WSW of No Day Tripping sign, 29.84 m (97.9
ft) SW of a line of boulders used to prevent vehicle access to clearing, 16.01 m
(52.5 ft) SSE of the centerline of the sand vehicle track, 14.22 m (46.7 ft) N
of the brush line on the S side of the clearing, and 0.94 m (3.1 ft) NNW of an
orange carsonite witness post. The datum point is set 12 cm (0.4 ft) below
grade, being the top of a stainless steel rod driven 28.0 m (92 ft) to
substantial resistance, in a sleeve extending to a depth of 0.9 m (3 ft) and
encased in a 5-inch NOS logo cap with a concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
Station ID: 8513398 PUBLICATION DATE: 04/17/2014
Name: MORICHES INLET (OPEN COAST)
NY
NOAA Chart: 12352 Latitude: 40° 45.9' N ( 40.76442)
USGS Quad: MORICHES Longitude: 72° 45.4' W ( -72.75597)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: W MORICHES NO 1 NO2 1962
DESIGNATION: W MORICHES 1 RM 2
MONUMENTATION: Reference Mark disk VM#: 20928
AGENCY: US Coast & Geodetic Survey IDB PID#:
SETTING CLASSIFICATION: Concrete Monument OPUS PID:
LATITUDE: 40° 46.1' N ( 40.76794) LONGITUDE: 72° 45.3' W ( -72.75519)
The bench mark is a disk set flush in the center of a round 0.49 m (1.6 ft)
diameter concrete post, 73.95 m (242.6 ft) N of bench mark 851 3398 B, 31.80 m
(104.3 ft) WNW of the centerline of the rock revetment along the channel, 13.41
m (44.0 ft) SSW of the stump of a cut off power pole, 4.30 m (14.1 ft) WNW of
the centerline of the N S sand vehicle track, 3.82 m (12.5 ft) ESE of the
vegetation line, 0.53 m (1.7 ft) ESE of an orange carsonite witness post, and
1.05 m (3.4 ft) above the sand vehicle track.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
Station ID: 8513398 PUBLICATION DATE: 04/17/2014
Name: MORICHES INLET (OPEN COAST)
NY
NOAA Chart: 12352 Latitude: 40° 45.9' N ( 40.76442)
USGS Quad: MORICHES Longitude: 72° 45.4' W ( -72.75597)
T I D A L D A T U M S
Tidal datums at MORICHES INLET (OPEN COAST) based on:
LENGTH OF SERIES: 2 MONTHS
TIME PERIOD: November 2013 - December 2013
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8531680 SANDY HOOK
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.974
MEAN HIGH WATER MHW = 0.906
MEAN SEA LEVEL MSL = 0.491
MEAN TIDE LEVEL MTL = 0.476
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
3398 D 2013 4.555 3.649
3398 A 2013 2.710 1.804
3398 B 2013 2.705 1.799
3398 C 2013 4.497 3.591
3398 E 2013 4.237 3.331
W MORICHES NO 1 NO2 1962 4.903 3.997
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
Station ID: 8513398 PUBLICATION DATE: 04/17/2014
Name: MORICHES INLET (OPEN COAST)
NY
NOAA Chart: 12352 Latitude: 40° 45.9' N ( 40.76442)
USGS Quad: MORICHES Longitude: 72° 45.4' W ( -72.75597)
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.