U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 8 Station ID: 8740166 PUBLICATION DATE: 07/08/2013 Name: GRAND BAY NERR, MISSISSIPPI SOUND MS NOAA Chart: 11373 Latitude: 30° 24.8' N ( 30.41300) USGS Quad: Kreole Longitude: 88° 24.2' W ( -88.40272) T I D A L B E N C H M A R K S
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 8 Station ID: 8740166 PUBLICATION DATE: 07/08/2013 Name: GRAND BAY NERR, MISSISSIPPI SOUND MS NOAA Chart: 11373 Latitude: 30° 24.8' N ( 30.41300) USGS Quad: Kreole Longitude: 88° 24.2' W ( -88.40272) T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 0166 B 2010 DESIGNATION: 874 0166 B ALIAS: 0166 B 2010 MONUMENTATION: Metal Rod VM#: 19679 AGENCY: Conrad Blucher Institute IDB PID#: DO5987 SETTING CLASSIFICATION: Metal rod driven into the ground OPUS PID#: DO5987 LATITUDE: 30° 24.8' N ( 30.41300) LONGITUDE: 88° 24.2' W ( -88.40333) The primary bench mark is a metal rod located 8.5 m (27.9 ft) north of center of the main road, 44.2 m (145.0 ft) west of 874 0166 A, and 33.3 m (109.3 ft) west of the north corner of ramp walkway to boat dock. The stainless steel rod is driven into the ground 92 ft (28.0 m) until refusal, encased in a 6" PVC pipe that projects 10" from the ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 8 Station ID: 8740166 PUBLICATION DATE: 07/08/2013 Name: GRAND BAY NERR, MISSISSIPPI SOUND MS NOAA Chart: 11373 Latitude: 30° 24.8' N ( 30.41300) USGS Quad: Kreole Longitude: 88° 24.2' W ( -88.40272) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 0166 A 2010 DESIGNATION: 874 0166 A ALIAS: 0166 A 2010 MONUMENTATION: Bench Mark disk VM#: 19680 AGENCY: Conrad Blucher Institute IDB PID#: DO5988 SETTING CLASSIFICATION: OPUS PID: LATITUDE: 30° 24.8' N ( 30.41303) LONGITUDE: 88° 24.2' W ( -88.40289) The bench mark is a disk set into the corner of the concrete walkway located 8.52 m (27.95 ft) south of the entrance to the ramp walkway leading to tide gauge, 20.4 m (66.9 ft) NE of the northern corner of the ramp leading to the boat dock, and 44.2 m (145.0 ft) east of 847 0166 B.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 8 Station ID: 8740166 PUBLICATION DATE: 07/08/2013 Name: GRAND BAY NERR, MISSISSIPPI SOUND MS NOAA Chart: 11373 Latitude: 30° 24.8' N ( 30.41300) USGS Quad: Kreole Longitude: 88° 24.2' W ( -88.40272) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 0166 C 2010 DESIGNATION: 874 0166 C ALIAS: 0166 C 2010 MONUMENTATION: Metal Rod VM#: 19681 AGENCY: Conrad Blucher Institute IDB PID#: DO5986 SETTING CLASSIFICATION: OPUS PID: LATITUDE: 30° 24.8' N ( 30.41300) LONGITUDE: 88° 24.2' W ( -88.40406) The bench mark is a metal rod located 6.3 m (20.7 ft) west of center of Cereal LN, 7.4 m (24.28 ft) north of center of main paved road, and 11.7 m (38.4 ft) north/NW of green cable route marker. The metal rod is a stainless steel rod driven 28.0 m (92 ft) until refusal.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 8 Station ID: 8740166 PUBLICATION DATE: 07/08/2013 Name: GRAND BAY NERR, MISSISSIPPI SOUND MS NOAA Chart: 11373 Latitude: 30° 24.8' N ( 30.41300) USGS Quad: Kreole Longitude: 88° 24.2' W ( -88.40272) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 0166 D 2010 DESIGNATION: 874 0166 D ALIAS: 0166 D 2010 MONUMENTATION: Metal Rod VM#: 19682 AGENCY: Conrad Blucher Institute IDB PID#: SETTING CLASSIFICATION: OPUS PID: LATITUDE: 30° 24.9' N ( 30.41436) LONGITUDE: 88° 24.2' W ( -88.40403) The bench mark is a metal rod located 5.8 m (19.0 ft) NW of center of Cereal LN, 14.8 m (48.6 ft) SW of telephone pole number 99N, and 77.8 m (255.2 ft) north of cable route marker near driveway. The metal rod is a stainless steel rod driven 28.0 m (92 ft) until refusal.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 8 Station ID: 8740166 PUBLICATION DATE: 07/08/2013 Name: GRAND BAY NERR, MISSISSIPPI SOUND MS NOAA Chart: 11373 Latitude: 30° 24.8' N ( 30.41300) USGS Quad: Kreole Longitude: 88° 24.2' W ( -88.40272) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 0166 E 2010 DESIGNATION: 874 0166 E ALIAS: 0166 E 2010 MONUMENTATION: Metal Rod VM#: 19683 AGENCY: Conrad Blucher Institute IDB PID#: DO5985 SETTING CLASSIFICATION: OPUS PID: LATITUDE: 30° 24.9' N ( 30.41436) LONGITUDE: 88° 24.2' W ( -88.40403) The bench mark is a metal rod located 12.0 m (39.4 ft) south of the main paved road, 12.0 m (39.4 ft) SE of cable route marker P63, and 0.3 m (1.0 ft) NE of chain link fence. The metal rod is a stainless steel rod driven 31.7 m (104 ft) until refusal.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 8 Station ID: 8740166 PUBLICATION DATE: 07/08/2013 Name: GRAND BAY NERR, MISSISSIPPI SOUND MS NOAA Chart: 11373 Latitude: 30° 24.8' N ( 30.41300) USGS Quad: Kreole Longitude: 88° 24.2' W ( -88.40272) T I D A L D A T U M S Tidal datums at GRAND BAY NERR, MISSISSIPPI SOUND based on: LENGTH OF SERIES: 6 MONTHS TIME PERIOD: March 2011 - August 2011 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8741533 PASCAGOULA NOAA LAB, PASCAGOULA RIVER Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 0.485 MEAN HIGH WATER MHW = 0.456 MEAN TIDE LEVEL MTL = 0.248 MEAN SEA LEVEL MSL = 0.236 North American Vertical Datum NAVD88 = 0.183 MEAN LOW WATER MLW = 0.039 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 0166 B 2010 0.703 0.247 0166 A 2010 1.206 0.750 0166 C 2010 1.156 0.700 0166 D 2010 0.893 0.437 0166 E 2010 0.838 0.382
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 8 of 8 Station ID: 8740166 PUBLICATION DATE: 07/08/2013 Name: GRAND BAY NERR, MISSISSIPPI SOUND MS NOAA Chart: 11373 Latitude: 30° 24.8' N ( 30.41300) USGS Quad: Kreole Longitude: 88° 24.2' W ( -88.40272) 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.