U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8744117 PUBLICATION DATE: 08/09/2005 Name: BILOXI, BAY OF BILOXI MS NOAA Chart: 11372 Latitude: 30° 24.7' N ( 30.41170) USGS Quad: BILOXI Longitude: 88° 54.2' W ( -88.90330) To reach the bench marks from Highway 110, travel into Biloxi and take the Bayview Avenue exit, which is the first exit after the bridge. Turn south on Bayview Avenue and proceed 2.1 km (1.3 mi) to the Forrest Avenue pier. The bench marks are located down Bayview Avenue toward the bridge and the water. The tide station is located on the pier. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 4117 E 2004 DESIGNATION: 874 4117 E MONUMENTATION: Flange-encased Rod VM#: 17644 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID: LATITUDE: 30° 24.7' N ( 30.41170) LONGITUDE: 88° 54.0' W ( -88.90000) The primary bench mark is located on the north side of Bayview Ave in a grassy area, 39.68 m (130.2 ft) east of a light pole number 6-99 / 3-40, 39.50 m (129.6 ft) west of the center line of Bayshore Drive, 19.70 m (64.6 ft) west of the southernly most live oak tree, 13.08 m (42.9 ft) north of the north curb of Bayview Ave, and 8.11 m (26.6 ft) south of a light pole number 12-99 / 3-40 with NOAA witness post. The mark being the top of a stainless steel rod, driven to 24.1 m (79 ft) to refusal and encased with a concrete kickblock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 8744117 PUBLICATION DATE: 08/09/2005 Name: BILOXI, BAY OF BILOXI MS NOAA Chart: 11372 Latitude: 30° 24.7' N ( 30.41170) USGS Quad: BILOXI Longitude: 88° 54.2' W ( -88.90330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 4117 A 2004 DESIGNATION: 974 4117 A MONUMENTATION: Flange-encased Rod VM#: 17640 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID: LATITUDE: 30° 24.7' N ( 30.41170) LONGITUDE: 88° 54.2' W ( -88.90330) The bench mark is located south of the SE corner of Forest Ave Pier parking lot across from the Forrest Ave pier, 33.50 m (109.9 ft) west of the west curb of Forrest Ave, 28.68 m (94.1 ft) south of the south curb of Bayview Ave, 28.4 m (93.2 ft) east of the NW corner of a black metal fence, 2.59 m (8.5 ft) north of a black metal fence, and 1.0 m (3.3 ft) north of a NOAA witness post. The mark being the top of a stainless steel rod, driven to 7.9 m (26 ft) to refusal and encased with a concrete kickblock. BENCH MARK STAMPING: 4117 B 2004 DESIGNATION: 874 4117 B MONUMENTATION: Tidal Station disk VM#: 17641 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete seawall OPUS PID: LATITUDE: 30° 24.7' N ( 30.41170) LONGITUDE: 88° 54.2' W ( -88.90330) The benchmark is a disk set in a concrete seawall, across the street from residence at 1091 Bayview Ave, 42.49 m (139.4 ft) east of the west end of the seawall, 9.0 m (29.5 ft) west of the center line of a wooden pier, 2.86 m (9.4 ft) west of the west curb of Bayview Ave, and 0.24 m (0.8 ft) above the road.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 8744117 PUBLICATION DATE: 08/09/2005 Name: BILOXI, BAY OF BILOXI MS NOAA Chart: 11372 Latitude: 30° 24.7' N ( 30.41170) USGS Quad: BILOXI Longitude: 88° 54.2' W ( -88.90330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 4117 C 2004 DESIGNATION: 874 4117 C MONUMENTATION: Tidal Station disk VM#: 17642 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete seawall OPUS PID: LATITUDE: 30° 24.7' N ( 30.41170) LONGITUDE: 88° 54.1' W ( -88.90170) The benchmark is a disk set in a concrete seawall, near the intersection of Bayview Ave and Porter Ave on the north side of Bayview Ave, 22.80 m (74.8 ft) east of a yellow fire hydrant number 4 across from residence at 1067 Bayview Ave, 2.75 m (9.0 ft) east of the east curb of Bayview, 1.31 m (4.3 ft) south of the centerline of the Porter Ave pier, 0.30 m (1.0 ft) above the road. BENCH MARK STAMPING: 4117 D 2004 DESIGNATION: 874 4117 D MONUMENTATION: Tidal Station disk VM#: 17643 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete seawall OPUS PID: LATITUDE: 30° 24.7' N ( 30.41170) LONGITUDE: 88° 54.0' W ( -88.90000) The benchmark is a disk set in a concrete seawall, across from residence at 1049 Bayview Ave on the north side of Bayview Ave, 56.11 m (184.1 ft) west of a light pole with electric box and transformer, 3.38 m (11.1 ft) east of a private dock, 2.71 m (8.9 ft) north of the north curb of Bayview Ave, and 0.30 m (1.0 ft) above the road.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8744117 PUBLICATION DATE: 08/09/2005 Name: BILOXI, BAY OF BILOXI MS NOAA Chart: 11372 Latitude: 30° 24.7' N ( 30.41170) USGS Quad: BILOXI Longitude: 88° 54.2' W ( -88.90330) T I D A L D A T U M S Tidal datums at BILOXI, BAY OF BILOXI based on: LENGTH OF SERIES: 5 MONTHS TIME PERIOD: August 2004 - December 2004 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8747766 WAVELAND, MISSISSIPPI SOUND Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 0.542 MEAN HIGH WATER MHW = 0.516 MEAN TIDE LEVEL MTL = 0.280 MEAN SEA LEVEL MSL = 0.276 MEAN LOW WATER MLW = 0.045 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 4117 E 2004 2.184 1.668 4117 A 2004 2.927 2.411 4117 B 2004 2.344 1.828 4117 C 2004 2.356 1.840 4117 D 2004 1.894 1.378
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8744117 PUBLICATION DATE: 08/09/2005 Name: BILOXI, BAY OF BILOXI MS NOAA Chart: 11372 Latitude: 30° 24.7' N ( 30.41170) USGS Quad: BILOXI Longitude: 88° 54.2' W ( -88.90330) 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.