U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 6 Station ID: 8768094 PUBLICATION DATE: 12/31/2020 Name: CALCASIEU PASS, EAST JETTY LA NOAA Chart: 11347 Latitude: 29° 46.1' N ( 29.76817) USGS Quad: CAMERON Longitude: 93° 20.6' W ( -93.34289) To reach the tidal bench marks from Cameron, proceed SW along State Highway 27and then at the end of Davis Street. The bench marks are in the vicinity of Cameron Parish property known as "Jetty Fishing Pier Facility". The tide station is located on the Jetty Fishing Pier. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 8094 G 2011 DESIGNATION: 876 8094 G MONUMENTATION: Metal Rod VM#: 20224 AGENCY: IDB PID: SETTING CLASSIFICATION: Stainless Steel rod. OPUS PID#: BBFT37 LATITUDE: 29° 46.0' N ( 29.76639) LONGITUDE: 93° 20.6' W ( -93.34281) The primary bench mark is a flange-encased rod set in the grass next to a utility pole (no number) off the west side of Davis Road, 75.30 m (247.0 ft) SSE of Calcasieu Pass channel marker 48, 17.80 m (58.5 ft) west of electric pole 540, 7.00 m (23.0 ft) west of the centerline of Davis Road, 6.70 m (22.0 ft) SW of curve warning road sign, 1.10 m (3.5 ft) east of electric support pole 535. The datum point is set 1.5 m (4.9 ft) above grade, being the top of a stainless steel rod driven 27.5 m (90.0 ft) to refusal, and encased in a 5-inch PVC pipe, with no logo cap and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 6 Station ID: 8768094 PUBLICATION DATE: 12/31/2020 Name: CALCASIEU PASS, EAST JETTY LA NOAA Chart: 11347 Latitude: 29° 46.1' N ( 29.76817) USGS Quad: CAMERON Longitude: 93° 20.6' W ( -93.34289) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 8094 A 2002 DESIGNATION: 876 8094 A MONUMENTATION: Tidal Station disk VM#: 16827 AGENCY: National Ocean Service (NOS) IDB PID: SETTING CLASSIFICATION: Concrete pier OPUS PID#: BBFY25 LATITUDE: 29° 45.9' N ( 29.76417) LONGITUDE: 93° 20.6' W ( -93.34264) The bench mark is a disk set flush in concrete pier at the shore end and on the north side of a concrete fishing pier known as the Jetty Fishing Pier Facility, 29.9 m (98.1ft) east of the west face or the off shore end of the fishing pier, 18.00 m (59.1 ft) south of the NW corner of the concrete parking area for the fishing pier, 3.1m (10.2 ft) west of the east edge of the walkway leading to the pier, 2.5 m (8.2 ft) north of the south face of the pier, 0.3 m (0.98 ft) south of the north face of the pier. BENCH MARK STAMPING: 8094 B 2002 DESIGNATION: 876 8094 B MONUMENTATION: Tidal Station disk VM#: 16828 AGENCY: National Ocean Service (NOS) IDB PID: SETTING CLASSIFICATION: Boulder OPUS PID#: BBFY26 LATITUDE: 29° 45.9' N ( 29.76481) LONGITUDE: 93° 20.6' W ( -93.34283) The bench mark is a disk set flush in the top of a large boulder located in the NW section of the Jetty Fishing Pier Facility, 73.2 m (240.2 ft) north of the north face of the fishing pier, 23.4 m (76.8 ft) west of the NW corner of a small corrogated guard shed, 17.3 m (56.8 ft) south of the fence line on the northern property line, and 0.6 m (1.97 ft) east of the west face of the boulder.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 6 Station ID: 8768094 PUBLICATION DATE: 12/31/2020 Name: CALCASIEU PASS, EAST JETTY LA NOAA Chart: 11347 Latitude: 29° 46.1' N ( 29.76817) USGS Quad: CAMERON Longitude: 93° 20.6' W ( -93.34289) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 8094 C 2002 DESIGNATION: 876 8094 C MONUMENTATION: Tidal Station disk VM#: 16829 AGENCY: National Ocean Service (NOS) IDB PID: SETTING CLASSIFICATION: Boat ramp OPUS PID#: BBFY27 LATITUDE: 29° 46.1' N ( 29.76783) LONGITUDE: 93° 20.5' W ( -93.34217) The bench mark is a disk set flush in the south side of a boat ramp that is just north of the Jetty Fishing Pier property, 37.9 m (124.3 ft) NW of the centerline of Davis Road, 9.0 m (29.5 ft) south of the north side of the boat ramp (south side of the wooden walkway), 5.5 m (18.0 ft) north of a wooden light pole (no number), and 0.03 m (0.10 ft) north of the south side of the boat ramp (north of the wooden walkway). BENCH MARK STAMPING: 8094 F 2008 DESIGNATION: 876 8094 F MONUMENTATION: Flange-encased Rod VM#: 18828 AGENCY: National Ocean Survey/Service (NOS) IDB PID#: SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID: LATITUDE: 29° 45.9' N ( 29.76494) LONGITUDE: 93° 20.5' W ( -93.34236) The bench mark is a flange-encased rod located 10.4 m (34.1 ft) SE of utility pole (number 61), 19.3 m (63.3 ft) east of the centerline of Davis RD., 54.6 m (179.1ft) east of the centerline of the east Rock Jetty of the Calcasieu Ship Channel, 70.1 m (230.0 ft) south of utility pole (no number) located north of utility pole (number 61), 0.8 m (2.6 ft) west of witness post, being a stainless steel rod is driven 24 m (78.7 ft) to refusal and encased in a 5-inch PVC pipe and concrete kick block, set flush with the ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 6 Station ID: 8768094 PUBLICATION DATE: 12/31/2020 Name: CALCASIEU PASS, EAST JETTY LA NOAA Chart: 11347 Latitude: 29° 46.1' N ( 29.76817) USGS Quad: CAMERON Longitude: 93° 20.6' W ( -93.34289) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 876 8094 SPIP 2008 DESIGNATION: 876 8094 SPIP MONUMENTATION: Tidal Station disk VM#: 18835 AGENCY: National Ocean Survey/Service (NOS) IDB PID: SETTING CLASSIFICATION: Disk on the sentinal platform OPUS PID: LATITUDE: 29° 46.1' N ( 29.76814) LONGITUDE: 93° 20.6' W ( -93.34292) The bench mark is a disk set flush on top of the SE corner of the Davit Plate located on the NW corner of the 3m x 3m (9.8 ft x 9.8 ft) platform, 1.6 m (5.2 ft) SE of the NW corner of the 3m x 3m (9.8 ft x 9.8 ft) platform, 2.3 m (7.5 ft) NE of the SW corner of the 3m x 3m (9.8 ft x 9.8 ft) platform, 3.2 m (10.5 ft) NW of the SE corner of the 3m x 3m (9.8 ft x 9.8 ft) platform 2.2 m (7.2 ft) SW of the NE corner of the 3m x 3m (9.8 ft x 9.8 ft) platform.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 6 Station ID: 8768094 PUBLICATION DATE: 12/31/2020 Name: CALCASIEU PASS, EAST JETTY LA NOAA Chart: 11347 Latitude: 29° 46.1' N ( 29.76817) USGS Quad: CAMERON Longitude: 93° 20.6' W ( -93.34289) T I D A L D A T U M S Tidal datums at CALCASIEU PASS, EAST JETTY based on: LENGTH OF SERIES: 14 YEARS TIME PERIOD: 03/2004-02/2008, 11/2008-10/2018 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8771450 GALVESTON PIER 21, GALVESTON CHANNEL Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (09/13/2008) = 3.622 MEAN HIGHER HIGH WATER MHHW = 0.551 MEAN HIGH WATER MHW = 0.520 North American Vertical Datum NAVD88 = 0.429 MEAN SEA LEVEL MSL = 0.340 MEAN TIDE LEVEL MTL = 0.335 MEAN LOW WATER MLW = 0.150 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (01/02/2003) = -1.017 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 8094 G 2011 0.970 0.450 8094 A 2002 1.801 1.281 8094 B 2002 1.369 0.849 8094 C 2002 1.190 0.670 8094 F 2008 1.202 0.682 876 8094 SPIP 2008 9.872 9.352 Foot Notes:
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 6 Station ID: 8768094 PUBLICATION DATE: 12/31/2020 Name: CALCASIEU PASS, EAST JETTY LA NOAA Chart: 11347 Latitude: 29° 46.1' N ( 29.76817) USGS Quad: CAMERON Longitude: 93° 20.6' W ( -93.34289) 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.