U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8744671 PUBLICATION DATE: 10/29/2014 Name: POPPS FERRY, BACK BAY OF BILOXI MS NOAA Chart: 11373 Latitude: 30° 24.8' N ( 30.41330) USGS Quad: BILOXI Longitude: 88° 58.5' W ( -88.97500) To reach the tidal bench marks from the intersection of U.S. Highway 90 and Beauvoir Road in Biloxi, proceed 0.8 m (1.3 km) north on Beauvoir Road to the intersection of Beauvoir Avenue and Pass Road; then 0.2 m (0.3 km) west on Pass Road to the intersection of Pass Road and Popps Ferry Road; then 0.8 m (1.3 km) north on Popps Ferry Road to the Popps Ferry Fish Camp at the south end of the bridge over Back Bay. The bench marks are located in the vicinity of the fish camp and north along Popps Ferry Road. The tide gage and staff were located on the south side of the Fish Camp pier just east of the gasoline pump. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 4671C 1979 DESIGNATION: 874 4671 C MONUMENTATION: Tidal Station disk VM#: 11544 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 30° 24.8' N ( 30.41330) LONGITUDE: 88° 58.5' W ( -88.97500) The bench mark is a disk crimped to a steel rod, located on the east side of Popps Ferry Road, 72 m (236 ft) south of bench mark 4671A 1979, 14.39 m (47.2 ft) east of the centerline of Popps Ferry Road, and 4 m (12 ft) SW of power pole #MI-CO,678,SPC,440. The bench mark is 0.09 m (0.3 ft) below ground level, crimped to a steel rod driven 14 m (45 ft) to refusal and encased in a 4-inch PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 8744671 PUBLICATION DATE: 10/29/2014 Name: POPPS FERRY, BACK BAY OF BILOXI MS NOAA Chart: 11373 Latitude: 30° 24.8' N ( 30.41330) USGS Quad: BILOXI Longitude: 88° 58.5' W ( -88.97500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 4671A 1979 DESIGNATION: 874 4671 A MONUMENTATION: Tidal Station disk VM#: 11543 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Bridge abutment OPUS PID: LATITUDE: 30° 24.8' N ( 30.41330) LONGITUDE: 88° 58.5' W ( -88.97500) The primary bench mark is a disk set on the SE corner abutment of the Popps Ferry Road bridge over Back Bay, 34 m (110 ft) west of the shoreline of a bayou, 31.49 m (103.3 ft) south of the SW corner of the Popps Ferry Fish Camp building, and 9.24 m (30.3 ft) east of the centerline of the bridge. BENCH MARK STAMPING: 4671D 1979 DESIGNATION: 874 4671 D MONUMENTATION: Tidal Station disk VM#: 11545 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 30° 24.8' N ( 30.41330) LONGITUDE: 88° 58.5' W ( -88.97500) The bench mark is a disk crimped to a steel rod, located on the west side of Popps Ferry Road, 75 m (246 ft) SW of bench mark 4671C 1979, 36 m (118 ft) south of a fence corner, 7 m (24 ft) west of the centerline of Popps Ferry road, 1.43 m (4.7 ft) SW of power pole #8, and 0.61 m (2.0 ft) west of a fence line. The bench mark is 0.09 m (0.3 ft) below ground level, crimped to a steel rod driven 12 m (40 ft) to refusal and encased in a 4-inch PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 8744671 PUBLICATION DATE: 10/29/2014 Name: POPPS FERRY, BACK BAY OF BILOXI MS NOAA Chart: 11373 Latitude: 30° 24.8' N ( 30.41330) USGS Quad: BILOXI Longitude: 88° 58.5' W ( -88.97500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 4671G 1982 DESIGNATION: 874 4671 G MONUMENTATION: Tidal Station disk VM#: 11547 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 30° 24.8' N ( 30.41330) LONGITUDE: 88° 58.5' W ( -88.97500) The bench mark is a disk crimped to a stainless steel rod, located 88 m (289 ft) south of bench mark 4671D 1979, 84 m (277 ft) NNW of the first fire hydrant north of the intersection of Popps Ferry Road and Old Bay Road, 40 m (131 ft) north of power pole #5, 7 m (24 ft) west of the centerline of Popps Ferry Road, and 2 m (6 ft) west of power pole #6 which bears a witness sign on its west face. The bench mark is 0.09 m (0.3 ft) below ground level, crimped to a stainless steel rod driven 16 m (52 ft) to substantial resistance, and encased in a 4-inch PVC pipe and concrete kickblock. BENCH MARK STAMPING: 4671 F 1982 DESIGNATION: 874 4671 F MONUMENTATION: Tidal Station disk VM#: 17873 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 30° 24.8' N ( 30.41330) LONGITUDE: 88° 58.5' W ( -88.97500) The bench mark is a stainless steel rod, located 6.4 m (21.0 ft) east of the centerline of the sidewalk leading to the dock at Popps Ferry Fish Camp, 5.8 m (19.0 ft) NE of the NE corner of Popps Ferry Restaurant, 4.3 m (14.0 ft) west of the intersection of the NE bulkhead and the east bulkhead surrounding the fish camp, 2.4 m (8.0 ft) north of the easternly light pole in a set of 4 light poles at the north side of the restaurant, and driven 15.24 m (50.0 ft) to refusal.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8744671 PUBLICATION DATE: 10/29/2014 Name: POPPS FERRY, BACK BAY OF BILOXI MS NOAA Chart: 11373 Latitude: 30° 24.8' N ( 30.41330) USGS Quad: BILOXI Longitude: 88° 58.5' W ( -88.97500) T I D A L D A T U M S Tidal datums at POPPS FERRY, BACK BAY OF BILOXI based on: LENGTH OF SERIES: 3 YEARS TIME PERIOD: January 1980 - December 1982 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8743735 BILOXI (CADET POINT), BILOXI BAY Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (01/20/1983) = 1.572 MEAN HIGHER HIGH WATER MHHW = 0.597 MEAN HIGH WATER MHW = 0.554 MEAN SEA LEVEL MSL = 0.309 MEAN TIDE LEVEL MTL = 0.299 MEAN LOW WATER MLW = 0.044 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (09/13/1979) = -1.076 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 4671C 1979 4.470 3.916 4671A 1979 4.314 3.760 4671D 1979 6.491 5.937 4671G 1982 6.912 6.358 4671 F 1982 0.874 0.320
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8744671 PUBLICATION DATE: 10/29/2014 Name: POPPS FERRY, BACK BAY OF BILOXI MS NOAA Chart: 11373 Latitude: 30° 24.8' N ( 30.41330) USGS Quad: BILOXI Longitude: 88° 58.5' W ( -88.97500) 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.