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National Ocean Service
Datums Page Page 1 of 8
Station ID: 8770653 PUBLICATION DATE: 07/08/2021
Name: CYPRESS, SAN JACINTO RIVER
NOAA Chart: 11329 Latitude: 29° 50.8' N ( 29.84670)
USGS Quad: HIGHLANDS Longitude: 95° 5.3' W ( -95.08830)
From the U.S. Post Office at 608 S. Main St. in Highland, Texas proceed North on
Main St. 2.6 miles to Grace Lane, turn left onto Grace Lane and continue West
1.8 miles to Lake Road, turn right onto Lake Road and proceed 0.2 miles to a
boat launch and the end of the road. The bench marks are located along Lake Rd,
Grace Lane and Crosby Lynchburg Road. The gauge is 300 feet Northwest of the
parking lot at the corner of the seawall along the San Jacinto River.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 0653 G 2019
DESIGNATION: 877 0653 G
MONUMENTATION: Flange-encased Rod VM#: 23294
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: OPUS PID:
LATITUDE: 29° 50.7' N ( 29.84547) LONGITUDE: 95° 5.3' W ( -95.08819)
The primary bench mark is a flange-encased rod set in the grass at the eastern
corner of Grace Lane and Lake Eoad, 16.30 m (53.5 ft) SEof the centerline of
Lake Road, 16.0 m (52.5 ft) NNE of power pole k252, 13.97 m (45.8 ft) north of
the centerline of Lake Road, 7.30 m (24.0 ft) SSE of a power pole, 7.25 m (23.8
ft) SW of a 17 inch pine tree and 0.30 m (1.0 ft) south of a carsonite post.
The datum point is set 10 cm (4 inches) below the ground, being the top of a
stainless-steel rod driven 10.97 m (36.0 ft) and encased in a 7.25-in (18 cm)
NOS logo cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 8
Station ID: 8770653 PUBLICATION DATE: 07/08/2021
Name: CYPRESS, SAN JACINTO RIVER
NOAA Chart: 11329 Latitude: 29° 50.8' N ( 29.84670)
USGS Quad: HIGHLANDS Longitude: 95° 5.3' W ( -95.08830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0653 A 1983
DESIGNATION: 877 0653 A 1983
MONUMENTATION: Tidal Station disk VM#: 11205
AGENCY: Conrad Blucher Institute (CBI) IDB PID:
SETTING CLASSIFICATION: Concrete ramp OPUS PID#: BBBR54
LATITUDE: 29° 50.8' N ( 29.84736) LONGITUDE: 95° 5.3' W ( -95.08794)
The bench mark is a disk set in the NE corner of a boat ramp, 42.37 m (139.0 ft)
NE of the SW corner of a boat launch, 41.00 m (134.5 ft) west of a power pole
with a street lamp, 15.0 m (49.2 ft) SW of the centerline of Lake Road, 9.32 m
(30.6 ft) SE of the sign for Harris City and 0.76 m (2.5 ft) NWof a 5x5 steel
post.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 8
Station ID: 8770653 PUBLICATION DATE: 07/08/2021
Name: CYPRESS, SAN JACINTO RIVER
NOAA Chart: 11329 Latitude: 29° 50.8' N ( 29.84670)
USGS Quad: HIGHLANDS Longitude: 95° 5.3' W ( -95.08830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: R 1202 1972
DESIGNATION: R 1202
MONUMENTATION: Vertical Control disk VM#: 23295
AGENCY: National Geodetic Survey (NGS) IDB PID#: AW0404
SETTING CLASSIFICATION: Copper clad steel rod OPUS PID:
LATITUDE: 29° 51.3' N ( 29.85486) LONGITUDE: 95° 3.5' W ( -95.05914)
The bench mark is a disk crimped to the top of a copper rod set along the
western side of Crosby Lynchburg Road, 37.90 m (124.3 ft) SSE of a white
cemetery sign, 11.70 m (38.4 ft) west of of the centerline of Crosby Lynchburg
Road, 1.00 m (3.3 ft) south of a concrete curb, 0.53 m (1.7 ft) south of a power
pole, 0.43 m (1.4 ft) southeast of a fence corner and 0.30 m (1.0 ft) north of a
witness post.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 8
Station ID: 8770653 PUBLICATION DATE: 07/08/2021
Name: CYPRESS, SAN JACINTO RIVER
NOAA Chart: 11329 Latitude: 29° 50.8' N ( 29.84670)
USGS Quad: HIGHLANDS Longitude: 95° 5.3' W ( -95.08830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: HGCSD 22 1986
DESIGNATION: HGCSD 22
MONUMENTATION: Flange-encased Rod VM#: 23296
AGENCY: National Geodetic Survey (NGS) IDB PID#: AW5657
SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID#: AW5657
LATITUDE: 29° 51.4' N ( 29.85744) LONGITUDE: 95° 3.6' W ( -95.05947)
The bench mark is a flange-encased rod set in the grass along the western side
of Crosby Lynchburg Road, 46.15 m (151.4 ft) north of a curb, 45.0 m (147.6 ft)
NNW of a power pole, 16.30 m (53.5 ft) west of the centerline of Crosby
Lynchburg Road, 4.15 m (13.6 ft) west of the corner of a fence, 0.55 m (1.8 ft)
south of a fence and 0.55 m (1.8 ft) south of a carsonite post. The datum point
is set 8 cm (3 inches) below the ground, being the top of a stainless-steel rod
encased in a 5-in (13 cm) NGS logo cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 8
Station ID: 8770653 PUBLICATION DATE: 07/08/2021
Name: CYPRESS, SAN JACINTO RIVER
NOAA Chart: 11329 Latitude: 29° 50.8' N ( 29.84670)
USGS Quad: HIGHLANDS Longitude: 95° 5.3' W ( -95.08830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: N 1019 1954
DESIGNATION: N 1019
MONUMENTATION: Bench Mark disk VM#: 23297
AGENCY: US Coast and Geodetic Survey (USCGS) IDB PID:
SETTING CLASSIFICATION: Headwall OPUS PID:
LATITUDE: 29° 50.5' N ( 29.84178) LONGITUDE: 95° 3.5' W ( -95.05769)
The bench mark is a disk set in a concrete wall near the NE corner of Crosby
Lynchburg Road and Barbers Hill Road, 32.50 m (106.6 ft) NNE of a power pole,
27.80 m (91.2 ft) NNW of power pole 26497, 18.80 m (61.7 ft) north of the
centerline of Barbers Hill Road, 12.10 m (39.7 ft) NW of a power pole and 7.50 m
(24.6 ft) east of the centerline of Crosby Lynchburg Road.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 8
Station ID: 8770653 PUBLICATION DATE: 07/08/2021
Name: CYPRESS, SAN JACINTO RIVER
NOAA Chart: 11329 Latitude: 29° 50.8' N ( 29.84670)
USGS Quad: HIGHLANDS Longitude: 95° 5.3' W ( -95.08830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: RM 070120 2002
DESIGNATION: RM 070120
MONUMENTATION: Flange-encased Rod VM#: 23452
AGENCY: IDB PID:
SETTING CLASSIFICATION: Aluminu alloy rod OPUS PID:
LATITUDE: 29° 50.8' N ( 29.84742) LONGITUDE: 95° 5.3' W ( -95.08800)
The bench mark is an alluminum alloy rod set in the NE corner of a boat ramp,
47.65 m (156.3 ft) WNW of a power pole with a street lamp, 45.95 m (150.8 ft)
NNE of the SW corner of a boat launch, 13.00 m (42.7 ft) SW of the centerline of
Lake Road, 9.45 m (31.0 ft) NW of a 5x5 steel post and 2.67 m (8.8 ft) east of a
sign for Harris City. The datum point is set 8 cm (3 inches) below the ground,
being the top of a stainless steel rod driven 6.1m into the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 8
Station ID: 8770653 PUBLICATION DATE: 07/08/2021
Name: CYPRESS, SAN JACINTO RIVER
NOAA Chart: 11329 Latitude: 29° 50.8' N ( 29.84670)
USGS Quad: HIGHLANDS Longitude: 95° 5.3' W ( -95.08830)
T I D A L D A T U M S
Tidal datums at CYPRESS, SAN JACINTO RIVER based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: December 2019 - February 2020
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8770777 MANCHESTER, HOUSTON SHIP CHANNEL
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.487
MEAN HIGH WATER MHW = 0.464
MEAN TIDE LEVEL MTL = 0.285
MEAN SEA LEVEL MSL = 0.270
MEAN LOW WATER MLW = 0.107
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum NAVD88 = -0.096
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
0653 G 2019 2.567 2.103
0653 A 1983 2.781 2.317
R 1202 1972 13.420 12.956
HGCSD 22 1986 13.163 12.699
N 1019 1954 12.882 12.418
RM 070120 2002 2.790 2.326
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 8
Station ID: 8770653 PUBLICATION DATE: 07/08/2021
Name: CYPRESS, SAN JACINTO RIVER
NOAA Chart: 11329 Latitude: 29° 50.8' N ( 29.84670)
USGS Quad: HIGHLANDS Longitude: 95° 5.3' W ( -95.08830)
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.