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.