U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8770733 PUBLICATION DATE: 10/26/2017
Name: LYNCHBURG LANDING, SAN JACINTO RIVER
TX
NOAA Chart: 11326 Latitude: 29° 45.9' N ( 29.76486)
USGS Quad: HIGHLANDS Longitude: 95° 4.7' W ( -95.07886)
From the junction of Interstate 10 and Crosby-Lynchburg Road (Exit 787), proceed
south on Lynchburg Road for 3.6 km (2.3 mi) to the Lynchburg Landing Ferry
Facility on the left. The station is located SE of the ferry landing inside the
fence at the NW corner of Lynchburg Landing Ferry Facility, 14.0 m (45.9 ft)
west of the NW corner of main building.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: LUB 0733 C 1995
DESIGNATION: 877 0733 C
MONUMENTATION: Bench Mark disk VM#: 16091
AGENCY: Lamar University Beaumont (LUB) IDB PID#: AJ4423
SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: AJ4423
LATITUDE: 29° 45.9' N ( 29.76469) LONGITUDE: 95° 4.7' W ( -95.07836)
The primary bench mark is a brass disk set on the grounds of the Lynchburg
Landing Ferry facility, 25.51 m (83.7 ft) NW of a fence on the SE side of the
compound, 10.88 m (35.7 ft) WSW of the NE corner of the main ferry building, and
4.81 m (15.8 ft) ENE of the SE corner of the main building. The bench mark
recessed 10 cm (0.3 ft) below grade and is crimped to the top of a stainless
steel rod driven 16.8 m (55 ft) to refusal, and encased in a 6-inch PVC pipe
with concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8770733 PUBLICATION DATE: 10/26/2017
Name: LYNCHBURG LANDING, SAN JACINTO RIVER
TX
NOAA Chart: 11326 Latitude: 29° 45.9' N ( 29.76486)
USGS Quad: HIGHLANDS Longitude: 95° 4.7' W ( -95.07886)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: C 1277 1978
DESIGNATION: C 1277
MONUMENTATION: Bench Mark disk VM#: 11774
AGENCY: National Geodetic Survey (NGS) IDB PID#: AW0942
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 29° 45.9' N ( 29.76464) LONGITUDE: 95° 4.7' W ( -95.07811)
The bench mark is a brass disk set on the grounds of the Lynchburg Landing Ferry
facility, 31.30 m (102.7 ft) SW of the NW corner of maintenance building, 29.50
m (96.8 ft) east of the SE corner of main building, 10.70 m (35.1 ft) NW of a
fence on the SE side of property, 0.55 m (1.8 ft) SE of a utility pole and 0.21
m (0.7 ft) NE of a metal witness post. The bench mark is recessed 30 cm (1.0 ft)
below grade and is a brass disk crimped to a stainless steel rod driven 16.80 m
(55.1 ft) to refusal.
BENCH MARK STAMPING: LUB 0733 D 1995
DESIGNATION: 877 0733 D
MONUMENTATION: Bench Mark disk VM#: 16092
AGENCY: Lamar University Beaumont (LUB) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 29° 45.9' N ( 29.76469) LONGITUDE: 95° 4.7' W ( -95.07864)
The bench mark is a brass disk set on the grounds of the Lynchburg Landing Ferry
facility, 12.19 m (40.0 ft) NNW of the NW corner of the main ferry building,
11.61 m (38.1 ft) south of the centerline of Crosby Lynchburg Road, and 2.56 m
(8.4 ft) WSW of a flag pole. The bench mark is recessed 10 cm (0.3 ft) below
grade and is crimped to a stainless steel rod driven 16.8 m (55.1 ft) to
refusal, and encased in a 6-inch PVC pipe with concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8770733 PUBLICATION DATE: 10/26/2017
Name: LYNCHBURG LANDING, SAN JACINTO RIVER
TX
NOAA Chart: 11326 Latitude: 29° 45.9' N ( 29.76486)
USGS Quad: HIGHLANDS Longitude: 95° 4.7' W ( -95.07886)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: LUB 0733 E 1995
DESIGNATION: 877 0733 E
MONUMENTATION: See descriptive text VM#: 16093
AGENCY: Lamar University Beaumont (LUB) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 29° 45.9' N ( 29.76481) LONGITUDE: 95° 4.7' W ( -95.07789)
The bench mark is a brass disk crimped to a stainless steel deep rod set on the
grounds of the Lynchburg Landing Ferry Facility, 15.5 m (50.8 ft) west of
telephone pole #313282, 13.0 m (42.6 ft) south of the centerline of
Crosby-Lynchburg Road, 0.55 m (1.8 ft) SE of a utility pole , 0.5 m (1.6 ft)
south of the facility chain link fence, and 0.21 m (0.7 ft) NE of a metal
witness post, driven 16.8 m (55.1 ft) to refusal, recessed 10 cm (0.3 ft) below
grade and encased in a 6-inch PVC pipe with concrete kickblock.
BENCH MARK STAMPING: LUB 0733 F 1995
DESIGNATION: 877 0733 F
MONUMENTATION: Bench Mark disk VM#: 16094
AGENCY: Lamar University Beaumont (LUB) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 29° 45.9' N ( 29.76500) LONGITUDE: 95° 4.7' W ( -95.07819)
The bench mark is a brass disk crimped to a stainless steel deep rod set to the
north of Crosby-Lynchburg Road, 23.6 m (77.7 ft) north of the Lynchburg Landing
Ferry Facility east gate, 11.3 m (37.1 ft) north of the centerline of
Crosby-Lynchburg Road, 0.5 m (1.6 ft) SSE of a telephone pole #c4060b, the bench
mark is recessed 10 cm (0.3 ft) below grade and is a brass disk crimped to a
stainless steel rod driven 16.8 m (55.1 ft) to refusal, and encased in a 6-inch
pvc pipe with concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8770733 PUBLICATION DATE: 10/26/2017
Name: LYNCHBURG LANDING, SAN JACINTO RIVER
TX
NOAA Chart: 11326 Latitude: 29° 45.9' N ( 29.76486)
USGS Quad: HIGHLANDS Longitude: 95° 4.7' W ( -95.07886)
T I D A L D A T U M S
Tidal datums at LYNCHBURG LANDING, SAN JACINTO RIVER based on:
LENGTH OF SERIES: 4 Years
TIME PERIOD: 8/1995-7/1996, 1/2001-12/2002, 1/2016-12/2016
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8770613 MORGANS POINT, BARBOURS CUT
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (08/27/2017) = 2.056
MEAN HIGHER HIGH WATER MHHW = 0.453
MEAN HIGH WATER MHW = 0.424
MEAN SEA LEVEL MSL = 0.246
MEAN TIDE LEVEL MTL = 0.239
MEAN LOW WATER MLW = 0.054
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum NAVD88 = -0.011
LOWEST OBSERVED WATER LEVEL (01/19/1996) = -1.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
LUB 0733 C 1995 2.197 1.773
C 1277 1978 1.009 0.585
LUB 0733 D 1995 2.137 1.713
LUB 0733 E 1995 1.302 0.878
LUB 0733 F 1995 0.793 0.369
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8770733 PUBLICATION DATE: 10/26/2017
Name: LYNCHBURG LANDING, SAN JACINTO RIVER
TX
NOAA Chart: 11326 Latitude: 29° 45.9' N ( 29.76486)
USGS Quad: HIGHLANDS Longitude: 95° 4.7' W ( -95.07886)
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.