U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 6 Station ID: 8668482 PUBLICATION DATE: 02/05/2004 Name: BAILEYS LANDING, OKATEE RIVER SC NOAA Chart: 11513 Latitude: 32° 20.8' N ( 32.34670) USGS Quad: JASPER Longitude: 80° 53.4' W ( -80.89000) To reach the tidal bench marks from the south end of Broad River Bridge, proceed SE on State Highway 170 for 8.7 km (5.4 mi) to County Road S-7-18 (Old Baileys Road), then turn left and proceed south and west on County Road S-7-18 for 2.7 km (1.7 mi) to a dirt driveway on the left leading to the Nimmer residence, then turn left and proceed 0.2 km (0.1 mi) to the Nimmer residence. The bench marks are located on the river bluff behind the house, and along the county road. The tide gage and staff were located on the dock behind the house. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: NO 3 DESIGNATION: 866 8482 TIDAL 3 MONUMENTATION: Tidal Station disk VM#: 4490 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: CK0820 SETTING CLASSIFICATION: Tile pipe surrounded by concrete OPUS PID: LATITUDE: 32° 20.7' N ( 32.34500) LONGITUDE: 80° 53.3' W ( -80.88830) The primary bench mark is a disk set flush in a tile pipe surrounded by concrete, located near the river bluff, 24 m (79 ft) east of bench mark NO 5 1973, 17.89 m (58.7 ft) SE of the SE corner of the Nimmer residence, 14.72 m (48.3 ft) SW of the NW corner of the Hightown residence, 12 m (39 ft) NE of the river bluff, and 10.36 m (34.0 ft) west of the SW corner of the Hightown residence. BENCH MARK STAMPING: NO 5 1973 DESIGNATION: 866 8482 TIDAL 5 ALIAS: MONUMENTATION: Tidal Station disk VM#: 4491 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: SETTING CLASSIFICATION: Concrete post OPUS PID: LATITUDE: 32° 20.8' N ( 32.34670) LONGITUDE: 80° 53.4' W ( -80.89000) The bench mark is a disk set flush in concrete near the dock, 24 m (79 ft) west of bench mark NO 3, 20.73 m (68.0 ft) SE of the brick support stairway of the Nimmer residence, 14.30 m (46.9 ft) SW of the SE corner of the residence, 2.32 m (7.6 ft) east of the concrete walkway to the dock, 0.61 m (2.0 ft) north of the river bluff, and at ground level. NOTE: The mark is badly scarred and the "N" is obliterated from the original stamping.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 6 Station ID: 8668482 PUBLICATION DATE: 02/05/2004 Name: BAILEYS LANDING, OKATEE RIVER SC NOAA Chart: 11513 Latitude: 32° 20.8' N ( 32.34670) USGS Quad: JASPER Longitude: 80° 53.4' W ( -80.89000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 8482 D 1978 DESIGNATION: 866 8482 D TIDAL MONUMENTATION: Tidal Station disk VM#: 4492 AGENCY: National Ocean Survey (NOS) IDB PID#: CK2144 SETTING CLASSIFICATION: Galvanized steel rod OPUS PID: LATITUDE: 32° 20.8' N ( 32.34670) LONGITUDE: 80° 53.4' W ( -80.89000) The bench mark is a disk located beside the dirt driveway just west of the Nimmer driveway, 102.72 m (337.0 ft) NNW of bench mark NO 3, 84 m (276 ft) SE of bench mark 8482 E 1978, 10.52 m (34.5 ft) south of the centerline of County Road S-7-18, 8.53 m (28.0 ft) north of a 0.61 m (2.0 ft) diameter oak tree, and 3.66 m (12.0 ft) east of the centerline of a dirt driveway. The bench mark is set at ground level, crimped to the top of a galvanized steel rod driven 7.0 m (23 ft) to refusal, and encased in a PVC pipe and concrete kickblock. BENCH MARK STAMPING: 8482 E 1978 DESIGNATION: 866 8482 E TIDAL MONUMENTATION: Tidal Station disk VM#: 4493 AGENCY: National Ocean Survey (NOS) IDB PID#: CK2143 SETTING CLASSIFICATION: Galvanized steel rod OPUS PID: LATITUDE: 32° 20.9' N ( 32.34830) LONGITUDE: 80° 53.5' W ( -80.89170) The bench mark is a disk located along the county road west of bench mark 8482 D 1978 near a white concrete driveway marker, 91.44 m (300.0 ft) north of bench mark Pinckney No 4 1957, 23.77 m (78.0 ft) north of a multi-trunk oak tree, 9.30 m (30.5 ft) north of telephone junction box #RP6R3, 8.38 m (27.5 ft) west of the centerline of the road, 5.18 m (17.0 ft) east of the corner of a wire mesh fence, and 5.18 m (17.0 ft) south of a dirt driveway to the Okatee River Estates. The bench mark is set at ground level, crimped to the top of a galvanized steel rod driven 9.8 m (32 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 3 of 6 Station ID: 8668482 PUBLICATION DATE: 02/05/2004 Name: BAILEYS LANDING, OKATEE RIVER SC NOAA Chart: 11513 Latitude: 32° 20.8' N ( 32.34670) USGS Quad: JASPER Longitude: 80° 53.4' W ( -80.89000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 8482 F 1978 DESIGNATION: 866 8482 F TIDAL MONUMENTATION: Tidal Station disk VM#: 4494 AGENCY: National Ocean Survey (NOS) IDB PID#: CK2142 SETTING CLASSIFICATION: Galvanized steel rod OPUS PID: LATITUDE: 32° 20.9' N ( 32.34830) LONGITUDE: 80° 53.5' W ( -80.89170) The bench mark is a disk located near an old pecan orchard 0.2 km (0.1 mi) west of the Nimmer driveway, 95.71 m (314.0 ft) north of bench mark 8482 E 1978, 10 m (33 ft) south of the centerline of a dirt driveway, 9.75 m (32.0 ft) west of the centerline of the county road, and 2.44 m (8.0 ft) south of a 0.61 m (2.0 ft) diameter pecan tree. The bench mark is set at ground level, crimped to the top of a galvanized steel rod driven 7.0 m (23 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 6 Station ID: 8668482 PUBLICATION DATE: 02/05/2004 Name: BAILEYS LANDING, OKATEE RIVER SC NOAA Chart: 11513 Latitude: 32° 20.8' N ( 32.34670) USGS Quad: JASPER Longitude: 80° 53.4' W ( -80.89000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: PINCKNEY NO 4 1957 DESIGNATION: PINCKNEY RM 4 MONUMENTATION: Reference Mark disk VM#: 4495 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: CK0816 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 32° 20.8' N ( 32.34670) LONGITUDE: 80° 53.5' W ( -80.89170) The bench mark is a disk located along the west bend in County Road S-7-18, 91.44 m (300.0 ft) south of bench mark 8482 E 1978, 12.19 m (40.0 ft) east of the centerline of a dirt driveway leading to a pond dike, 4.27 m (14.0 ft) west of a wire mesh fence, 1.28 m (4.2 ft) north of a 4-foot (1.2 m) diameter live oak tree, and 0.06 m (0.2 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 6 Station ID: 8668482 PUBLICATION DATE: 02/05/2004 Name: BAILEYS LANDING, OKATEE RIVER SC NOAA Chart: 11513 Latitude: 32° 20.8' N ( 32.34670) USGS Quad: JASPER Longitude: 80° 53.4' W ( -80.89000) T I D A L D A T U M S Tidal datums at BAILEYS LANDING, OKATEE RIVER based on: LENGTH OF SERIES: 1 YEAR TIME PERIOD: March 1978 - February 1979 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8667999 BEAUFORT Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (07/19/1978) = 3.262 MEAN HIGHER HIGH WATER MHHW = 2.663 MEAN HIGH WATER MHW = 2.536 North American Vertical Datum NAVD88 = 1.461 MEAN SEA LEVEL MSL = 1.439 MEAN TIDE LEVEL MTL = 1.304 MEAN LOW WATER MLW = 0.071 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (01/29/1979) = -0.935 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW NO 3 7.831 5.295 NO 5 1973 7.881 5.345 8482 D 1978 7.820 5.284 8482 E 1978 7.924 5.388 8482 F 1978 7.788 5.252 PINCKNEY NO 4 1957 7.550 5.014
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 6 Station ID: 8668482 PUBLICATION DATE: 02/05/2004 Name: BAILEYS LANDING, OKATEE RIVER SC NOAA Chart: 11513 Latitude: 32° 20.8' N ( 32.34670) USGS Quad: JASPER Longitude: 80° 53.4' W ( -80.89000) 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.