U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8665737 PUBLICATION DATE: 05/27/2003 Name: JACKSONBORO CAMP, EDISTO RIVER SC NOAA Chart: 11521 Latitude: 32° 45.2' N ( 32.75330) USGS Quad: COTTAGEVILLE Longitude: 80° 27.0' W ( -80.45000) To reach the tidal bench marks from the west end of the U.S. Highway 17 bridge over Edisto River near Jacksonboro, proceed west on U.S. Highway 17 for 0.8 km (0.5 mi) to State Road S-15-30 in Jacksonboro, turn south onto State Road S-15-30 and go 1.6 km (1.0 mi) to a dirt road on the left side of the road, turn left (east) onto the dirt road and go 0.5 km (0.3 mi) to Edisto River. The bench marks are along the row of cottages on the river. The tide gage and staff were on the wooden sea wall beside a floating dock. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 5737 A 1977 DESIGNATION: 866 5737 A TIDAL MONUMENTATION: Tidal Station disk VM#: 4226 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 32° 45.2' N ( 32.75330) LONGITUDE: 80° 27.0' W ( -80.45000) The primary bench mark is a disk crimped to a copper-clad steel rod, located 10.49 m (34.4 ft) SSE of the SE corner of a red house on stilts, 9.75 m (32.0 ft) NNE of the NE corner of a brown house on stilts, 4.02 m (13.2 ft) SW of the SW corner of a wooden dock, 2.90 m (9.5 ft) west of the river shoreline, and 0.76 m (2.5 ft) north of the north edge of a homemade concrete boat landing. The bench mark is 0.03 m (0.1 ft) below ground level, crimped to a copper-clad steel rod driven 6 m (20 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: 8665737 PUBLICATION DATE: 05/27/2003 Name: JACKSONBORO CAMP, EDISTO RIVER SC NOAA Chart: 11521 Latitude: 32° 45.2' N ( 32.75330) USGS Quad: COTTAGEVILLE Longitude: 80° 27.0' W ( -80.45000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5737 C 1977 DESIGNATION: 866 5737 C TIDAL MONUMENTATION: Tidal Station disk VM#: 4228 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 32° 45.2' N ( 32.75330) LONGITUDE: 80° 27.0' W ( -80.45000) The bench mark is a disk crimped to a copper-clad steel rod, located near the dirt road leading to State Road S-15-30, 51.39 m (168.6 ft) north of Bench Mark 5737 G 1982, 19.81 m (65.0 ft) SW of the SW corner of a brown house on stilts, 8.08 m (26.5 ft) west of the metal anchor supporting the guy wire to power pole #85800, 6.71 m (22.0 ft) ENE of the centerline of the dirt road from State Road S-15-30, and 1.22 m (4.0 ft) west of power pole #85800. The bench mark is 0.03 m (0.1 ft) below ground level, crimped to a copper-clad steel rod driven 6 m (20 ft) to refusal, and encased in a 4-inch PVC pipe and concrete kickblock. BENCH MARK STAMPING: 5737 E 1977 DESIGNATION: 866 5737 E TIDAL MONUMENTATION: Tidal Station disk VM#: 4230 AGENCY: National Ocean Survey (NOS) IDB PID#: CK3121 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 32° 45.3' N ( 32.75500) LONGITUDE: 80° 27.0' W ( -80.45000) The bench mark is a disk crimped to a copper-clad steel rod, located 29.78 m (97.7 ft) SW of the SW corner of a green house on stilts, 25.91 m (85.0 ft) north of a tidal canal perpendicular to the river, 15.36 m (50.4 ft) NW of the NW corner of a white cinderblock house, 13.75 m (45.1 ft) west of the SW corner of a white shingle house, and 1.46 m (5.0 ft) NE of power pole #175950. The bench mark is 0.03 m (0.1 ft) below ground level, crimped to a copper-clad steel rod driven 4 m (12 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: 8665737 PUBLICATION DATE: 05/27/2003 Name: JACKSONBORO CAMP, EDISTO RIVER SC NOAA Chart: 11521 Latitude: 32° 45.2' N ( 32.75330) USGS Quad: COTTAGEVILLE Longitude: 80° 27.0' W ( -80.45000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5737 F 1982 DESIGNATION: 866 5737 F TIDAL MONUMENTATION: Tidal Station disk VM#: 7482 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 32° 45.2' N ( 32.75330) LONGITUDE: 80° 27.0' W ( -80.45000) The bench mark is a disk set in a concrete monument 49.74 m (163.2 ft) north of Bench Mark 5737 C 1977, 34.99 m (114.8 ft) NW of Bench Mark 5737 A 1977, 16.40 m (53.8 ft) NW of the NW corner of a red house on stilts, 9.94 m (32.6 ft) NNE of the NE corner of an open boat shed, 3 m (10 ft) SSW of underground cable box #A39L1L1, 0.73 m (2.4 ft) SSW of power pole #175952, and at ground level. BENCH MARK STAMPING: 5737 G 1982 DESIGNATION: 866 5737 G TIDAL MONUMENTATION: Tidal Station disk VM#: 7483 AGENCY: National Ocean Survey (NOS) IDB PID#: CK3120 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 32° 45.3' N ( 32.75500) LONGITUDE: 80° 27.0' W ( -80.45000) The bench mark is a disk set in a concrete monument near a green house on stilts, 41.27 m (135.4 ft) NNE of Bench Mark 5737 E 1977, 15.61 m (51.2 ft) NE of the NE corner of a green aluminum-sided house, 3.26 m (10.7 ft) east ofthe centerline of a dirt road, 1.43 m (4.7 ft) north of power pole #175951, and 0.03 m (0.1 ft) below ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8665737 PUBLICATION DATE: 05/27/2003 Name: JACKSONBORO CAMP, EDISTO RIVER SC NOAA Chart: 11521 Latitude: 32° 45.2' N ( 32.75330) USGS Quad: COTTAGEVILLE Longitude: 80° 27.0' W ( -80.45000) T I D A L D A T U M S Tidal datums at JACKSONBORO CAMP, EDISTO RIVER based on: LENGTH OF SERIES: 7 MONTHS TIME PERIOD: June 1978 - December 1978 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8665530 CHARLESTON, COOPER RIVER ENTRANCE Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 1.353 MEAN HIGH WATER MHW = 1.289 MEAN SEA LEVEL MSL = 0.753 MEAN TIDE LEVEL MTL = 0.674 North American Vertical Datum NAVD88 = 0.401 MEAN LOW WATER MLW = 0.059 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 5737 A 1977 1.696 0.407 5737 C 1977 2.097 0.808 5737 E 1977 1.632 0.343 5737 F 1982 1.812 0.523 5737 G 1982 1.776 0.487
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8665737 PUBLICATION DATE: 05/27/2003 Name: JACKSONBORO CAMP, EDISTO RIVER SC NOAA Chart: 11521 Latitude: 32° 45.2' N ( 32.75330) USGS Quad: COTTAGEVILLE Longitude: 80° 27.0' W ( -80.45000) 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.