U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8661593 PUBLICATION DATE: 08/03/2004 Name: WINEA PLANTATION, BLACK RIVER SC NOAA Chart: 11532 Latitude: 33° 32.1' N ( 33.53500) USGS Quad: RHEMS Longitude: 79° 23.3' W ( -79.38830) To reach the tidal bench marks from the intersection of U.S. Highway 521 and State Highway 41 in Andrews, proceed north on State Highway 41 for 18.5 km (11.5 mi), then turn right on State Highway 51and proceed south for 8.2 km (5.1 mi) to a dirt road entrance at Winea Plantation, then turn left onto the dirt road and proceed through the wooden gates for 0.3 km (0.2 mi) to the parking area on the rise overlooking the wooden boat house. Caution should be exercised while parking, as the ground can become very soft. The bench marks are located in the vicinity of the parking area and the nearby woods. The tide gage and staff were located in the boat house. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 1593 C 1982 DESIGNATION: 866 1593 C TIDAL MONUMENTATION: Tidal Station disk VM#: 3831 AGENCY: National Ocean Survey (NOS) IDB PID#: DD2212 SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 33° 32.1' N ( 33.53500) LONGITUDE: 79° 23.4' W ( -79.39000) The primary bench mark is a disk located near the boat house along a barbed wire fence and a 0.97 m (3.2 ft) cypress tree, 21.03 m (69.0 ft) WNW of the wooden boat house, 14.84 m (48.7 ft) NNW of the northwestern corner of a concrete block pumphouse, 1.71 m (5.6 ft) SSW of the fence, and 0.55 m (1.8 ft) SSW of a witness post and sign. The bench mark is set 0.03 m (0.1 ft) below ground level, crimped to the top of a stainless steel rod driven 4.9 m (16 ft) to refusal, and encased in a PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 8661593 PUBLICATION DATE: 08/03/2004 Name: WINEA PLANTATION, BLACK RIVER SC NOAA Chart: 11532 Latitude: 33° 32.1' N ( 33.53500) USGS Quad: RHEMS Longitude: 79° 23.3' W ( -79.38830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 35 SY 48 1934 DESIGNATION: 35 SY 48 MONUMENTATION: Bench Mark disk VM#: 3829 AGENCY: US Geological Survey (USGS) IDB PID#: DD2210 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 33° 32.1' N ( 33.53500) LONGITUDE: 79° 23.4' W ( -79.39000) The bench mark is a disk set in a concrete monument located near a wire fence NW of the Winea plantation entrance, 52.97 m (173.8 ft) west of bench mark 1593 E 1982, 33.56 m (110.1 ft) NNW of the northern most pillar to the entrance of the property, 19.90 m (65.3 ft) WNW of a 1 m (3 ft) diameter tree (measured at the west face), 2.71 m (8.9 ft) NE of the wooden fence line, 0.49 m (1.6 ft) NE of a metal witness post and sign, and 0.06 m (0.2 ft) above the ground. BENCH MARK STAMPING: 1593 B 1982 DESIGNATION: 866 1593 B TIDAL MONUMENTATION: Tidal Station disk VM#: 3830 AGENCY: National Ocean Survey (NOS) IDB PID#: DD2213 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 33° 32.1' N ( 33.53500) LONGITUDE: 79° 23.4' W ( -79.39000) The bench mark is a disk set in a concrete monument located in a partially cleared wooded area, 66.11 m (216.9 ft) NE of bench mark 1593 E 1982, 41.00 m (134.5 ft) NW of bench mark 1593 C 1982, 11.06 m (36.3 ft) west of a barbed wire fence, 7.38 m (24.2 ft) south of a woven wire fence, and 0.06 m (0.2 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 8661593 PUBLICATION DATE: 08/03/2004 Name: WINEA PLANTATION, BLACK RIVER SC NOAA Chart: 11532 Latitude: 33° 32.1' N ( 33.53500) USGS Quad: RHEMS Longitude: 79° 23.3' W ( -79.38830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 1593 D 1982 DESIGNATION: 866 1593 D TIDAL MONUMENTATION: Tidal Station disk VM#: 3832 AGENCY: National Ocean Survey (NOS) IDB PID#: DD2209 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 33° 32.1' N ( 33.53500) LONGITUDE: 79° 23.4' W ( -79.39000) The bench mark is a disk set in a concrete monument located near the SW entrance of the Winea plantation, 43.77 m (143.6 ft) SW of bench mark 1593 E 1982, 33.56 m (110.1 ft) SSE of bench mark ELEV 35 FT SY 48 1934, 14.72 m (48.3 ft) SE of the north wooden pillar at the entrance to the property, 5.94 m (19.5 ft) south of the centerline of the dirt road, 5.82 m (19.1 ft) NE of a fence post. BENCH MARK STAMPING: 1593 E 1982 DESIGNATION: 866 1593 E TIDAL MONUMENTATION: Tidal Station disk VM#: 3833 AGENCY: National Ocean Survey (NOS) IDB PID#: DD2211 SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 33° 32.1' N ( 33.53500) LONGITUDE: 79° 23.4' W ( -79.39000) The bench mark is a disk located in an open area near a group of pine trees, 52.97 m (173.8 ft) east of bench mark 35 SY 48 1934, 17.37 m (57.0 ft) NNW of the centerline of the dirt road, 5.52 m (18.1 ft) south of an irrigation pipe head extending 1 m (3 ft) above the ground, and 0.40 m (1.3 ft) SSE of a metal witness post and sign. The bench mark is set at ground level, crimped to the top of a stainless steel rod driven 6.1 m (20 ft) to refusal, and encased in a PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8661593 PUBLICATION DATE: 08/03/2004 Name: WINEA PLANTATION, BLACK RIVER SC NOAA Chart: 11532 Latitude: 33° 32.1' N ( 33.53500) USGS Quad: RHEMS Longitude: 79° 23.3' W ( -79.38830) T I D A L D A T U M S Tidal datums at WINEA PLANTATION, BLACK RIVER based on: LENGTH OF SERIES: 3 MONTHS TIME PERIOD: April 1982 - June 1982 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8661139 BUCKSPORT, WACCAMAW RIVER Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 0.803 MEAN HIGH WATER MHW = 0.769 MEAN SEA LEVEL MSL = 0.458 MEAN TIDE LEVEL MTL = 0.408 North American Vertical Datum NAVD88 = 0.326 MEAN LOW WATER MLW = 0.048 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 1593 C 1982 3.576 2.807 35 SY 48 1934 10.816 10.047 1593 B 1982 5.847 5.078 1593 D 1982 10.656 9.887 1593 E 1982 9.206 8.437
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8661593 PUBLICATION DATE: 08/03/2004 Name: WINEA PLANTATION, BLACK RIVER SC NOAA Chart: 11532 Latitude: 33° 32.1' N ( 33.53500) USGS Quad: RHEMS Longitude: 79° 23.3' W ( -79.38830) 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.