U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8672875 PUBLICATION DATE: 08/09/2012 Name: SUNBURY, SUNBURY CH.,MEDWAY R. GA NOAA Chart: 11511 Latitude: 31° 46.0' N ( 31.76670) USGS Quad: LIMERICK SE Longitude: 81° 16.7' W ( -81.27830) To reach the tidal bench marks from the intersection of Interstate I-95 and State Road 38, south of Savannah, Georgia. Travel 16.1 km (10 mi) SE on State Road 38 to the intersection of a unmarked county road. Turn left (NE) and proceed approximately 11.3 km (7 mi) to the town of Sunbury, on Sunbury Channel. The bench marks are on the property of Mr. W. Fillingame. The tide gage and staff were on the pier, south of the Morgan residence and SE of the Fillingame residence. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: SUNBURY 1933 DESIGNATION: 867 2875 SUNBURY 1933 MONUMENTATION: Triangulation Station disk VM#: 4751 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: BR0546 SETTING CLASSIFICATION: Concrete post OPUS PID: LATITUDE: 31° 46.0' N ( 31.76731) LONGITUDE: 81° 16.7' W ( -81.27869) The bench mark is a disk set flush in top of a concrete post projecting 0.1 m (0.3 ft) above ground level, in the backyard of the W. Fillingame residence, 49 m (160 ft) NW of Bench Mark NO 1, 46 m (150 ft) north of Bench Mark Sunbury NO 1 1933, 30 m (99 ft) SE of the SE corner of the Fillingame residence (a 2 storied frame house), 16 m (52 ft) west of the shoreline 6 m (21 ft) NW of SW corner of south brick pillar of first brick wall, east of the house, and 4 m (12 ft) west of brick wall.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 8672875 PUBLICATION DATE: 08/09/2012 Name: SUNBURY, SUNBURY CH.,MEDWAY R. GA NOAA Chart: 11511 Latitude: 31° 46.0' N ( 31.76670) USGS Quad: LIMERICK SE Longitude: 81° 16.7' W ( -81.27830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: SUNBURY NO 1 1933 DESIGNATION: 867 2875 SUNBURY 1 1933 MONUMENTATION: Reference Mark disk VM#: 4752 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: BR0544 SETTING CLASSIFICATION: Concrete post OPUS PID: LATITUDE: 31° 46.0' N ( 31.76686) LONGITUDE: 81° 16.7' W ( -81.27867) The bench mark is a disk set flush in top of a concrete post projecting 0.06 m (0.2 ft) above ground level, in the backyard of the W. Fillingame residence, 76 m (249 ft) SE of the SE corner of the Fillingame residence, 46 m (150 ft) south of Bench Mark NO 1, 6 m (20 ft) NW of a large cedar tree, 2 m (8 ft) SE of the NE corner of a brick pump house, 2.29 m (7.5 ft) NE of the SE corner of the pump house. BENCH MARK STAMPING: 2875 F 2011 DESIGNATION: 867 2875 F MONUMENTATION: See descriptive text VM#: 20386 AGENCY: IDB PID#: SETTING CLASSIFICATION: see text OPUS PID: LATITUDE: 31° 45.9' N ( 31.76458) LONGITUDE: 81° 16.9' W ( -81.28231) The bench mark is a metal rod located 12.1 km (7.5 mi) ESE of Dorchester, 11.4 km (7.1 mi) SSW of Oak Leve, 5.0 km (3.1 mi) ENE of Seabrook, 40.6 m (133.2 ft) east of utility pole numbered 309, 36.5 m (119.8 ft) SSE of a gazebo, 15.8 m (51.8 ft) NE of a do not enter sign, 5.5 m (18.0 ft) N of the centerline of Fort Morris Road, 0.7 m (2.3 ft) south of utility pole numbered 619. The bench mark is recessed 0.2 m (0.7 ft), being the top of a stainless steel rod driven 12 m (39.3 ft) to refusal, and encased in a 5-inch logo cap.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 8672875 PUBLICATION DATE: 08/09/2012 Name: SUNBURY, SUNBURY CH.,MEDWAY R. GA NOAA Chart: 11511 Latitude: 31° 46.0' N ( 31.76670) USGS Quad: LIMERICK SE Longitude: 81° 16.7' W ( -81.27830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 2875 G 2011 DESIGNATION: 2875 G 2011 MONUMENTATION: See descriptive text VM#: 20387 AGENCY: IDB PID#: SETTING CLASSIFICATION: see text OPUS PID: LATITUDE: 31° 45.9' N ( 31.76553) LONGITUDE: 81° 16.9' W ( -81.28214) The bench mark is a metal rod located 12.1 km (7.5 mi) ESE of Dorchester, 11.3 km (7.0 mi) SSW of Oak Leve, 5.1 km (3.2 mi) ENE of Seabrook, 47.2 m (154.9 ft) ESE of the shoreline of a pond, 27.1 m (88.9 ft) WNW of a 15 mph speed limit sign, 19.5 m (64.0 ft) WNW of utility pole numbered 1292, 7.8 m (25.6 ft) W of the centerline of brigantine dunmore road, 0.5 m (1.6 ft) ESE of a utility pole. The bench mark is recessed 0.2 m (0.7 ft), being the top of a stainless steel rod driven 20 m (65.6 ft) to refusal, and encased in a 5-inch Logo cap. BENCH MARK STAMPING: 2875 H 2011 DESIGNATION: 2875 H 2011 MONUMENTATION: See descriptive text VM#: 20388 AGENCY: IDB PID#: SETTING CLASSIFICATION: see text OPUS PID#: BBCT07 LATITUDE: 31° 45.9' N ( 31.76442) LONGITUDE: 81° 16.7' W ( -81.27861) The bench mark is a disk located 12.5 km (7.8 mi) ESE of Dorchester, 11.3 km (7.0 mi) SSW of Oak Leve, 5.3 km (3.3 mi) ENE of Seabrook, 14.9 m (48.9 ft) north of utility pole numbered 50, 8.8 m (28.9 ft) north of the centerline of a boat ramp, 4.2 m (13.8 ft) E of the centerline of the road turnaround, 1.4 m (4.6 ft) S of the Centerline of the dock walkway entrance, 00.2 m (0.7 ft) E of the eastern edge of the sidewalk. The bench mark is a disk set flush on top of base for concrete dock 0.3 m (1.0 ft) above the ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8672875 PUBLICATION DATE: 08/09/2012 Name: SUNBURY, SUNBURY CH.,MEDWAY R. GA NOAA Chart: 11511 Latitude: 31° 46.0' N ( 31.76670) USGS Quad: LIMERICK SE Longitude: 81° 16.7' W ( -81.27830) T I D A L D A T U M S Tidal datums at SUNBURY, SUNBURY CH.,MEDWAY R. based on: LENGTH OF SERIES: 3 MONTHS TIME PERIOD: February 2012 - April 2012 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8670870 FORT PULASKI, SAVANNAH RIVER Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 2.396 MEAN HIGH WATER MHW = 2.289 MEAN SEA LEVEL MSL = 1.294 MEAN TIDE LEVEL MTL = 1.179 MEAN LOW WATER MLW = 0.068 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW SUNBURY 1933 7.392 5.103 SUNBURY NO 1 1933 6.970 4.681 2875 F 2011 8.106 5.817 2875 G 2011 7.861 5.572 2875 H 2011 3.199 0.910
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8672875 PUBLICATION DATE: 08/09/2012 Name: SUNBURY, SUNBURY CH.,MEDWAY R. GA NOAA Chart: 11511 Latitude: 31° 46.0' N ( 31.76670) USGS Quad: LIMERICK SE Longitude: 81° 16.7' W ( -81.27830) 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.