U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8662245 PUBLICATION DATE: 02/09/2017 Name: OYSTER LANDING, CRAB HAUL CREEK SC NOAA Chart: 11532 Latitude: 33° 21.1' N ( 33.35170) USGS Quad: PLANTERSVILLE Longitude: 79° 11.2' W ( -79.18670) From the intersection of US Highways 17 and 701 in Georgetown, proceed east on US Highway 17 for apporximately 7 km (4 mi) to the entrance to the Belle W. Baruch Institute for Marine Biology and Coastal Research, then turn right onto the entrance road and proceed for 0.08 km (0.05 mi) to an electric gate, then proceed past the gate for 0.5 km (0.3 mi) to a sand road on the left and a forked sand road up ahead, then turn left on the sand road and proceed for 3.62 km (2.25 mi) to a gravel parking lot for the lab on the left, then turn left through the parking lot for 0.08 mi (0.05 mi) to a T-junction with a sand road, then turn left onto the sand road and proceed for 0.2 km (0.1 mi) to the maintenance shed, then continue on the causeway leading to the research pier. The bench marks are along the road leading from the maintenace shed to the pier. The tide station is located at the end of the pier. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 2245 A 1982 DESIGNATION: 866 2245 A TIDAL MONUMENTATION: Tidal Station disk VM#: 16408 AGENCY: National Ocean Survey (NOS) IDB PID#: DD1345 SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: DD1345 LATITUDE: 33° 21.0' N ( 33.35000) LONGITUDE: 79° 11.4' W ( -79.19000) The primary bench mark is a disk set near the Belle Baruch Institute lab boat landing on Crab Haul Creek, 8.11 m (26.6 ft) ENE of the north corner of a concrete boat landing, 4.45 m (14.6 ft) north of power pole No. 70915 with a security light, 0.52 m (1.7 ft) SSE of power pole No. 0656 with three transformers, and 0.46 m (1.5 ft) ESE of a witness post. The bench mark is set 10 cm (0.3 ft) below ground level, crimped to the top of a stainless steel rod driven 11.3 m (37 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: 8662245 PUBLICATION DATE: 02/09/2017 Name: OYSTER LANDING, CRAB HAUL CREEK SC NOAA Chart: 11532 Latitude: 33° 21.1' N ( 33.35170) USGS Quad: PLANTERSVILLE Longitude: 79° 11.2' W ( -79.18670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 2245 B 1982 DESIGNATION: 866 2245 B TIDAL MONUMENTATION: Tidal Station disk VM#: 16409 AGENCY: National Ocean Survey (NOS) IDB PID#: DD1344 SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 33° 21.0' N ( 33.35000) LONGITUDE: 79° 11.5' W ( -79.19170) The bench mark is a disk set along the road leading to the lab boat ramp and pier, 45.35 m (148.8 ft) west of power pole No. 50908, 29.29 m (96.1 ft) SE of power pole No. 0657, 4.57 m (14.99 ft) SSW of the center of the road, 0.24 m (0.8 ft) north of a metal witness post, and 0.76 m (2.5 ft) below the road. The bench mark is set 18 cm (0.6 ft) below ground level, crimped to the top of a stainless steel rod driven 13.4 m (44 ft) to refusal, and encased in a PVC pipe and concrete kickblock. BENCH MARK STAMPING: 2245 C 1982 DESIGNATION: 866 2245 C TIDAL MONUMENTATION: Tidal Station disk VM#: 16410 AGENCY: National Ocean Survey (NOS) IDB PID#: DD1343 SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 33° 21.0' N ( 33.35000) LONGITUDE: 79° 11.5' W ( -79.19170) The bench mark is a disk set along the dirt road leading to the lab boat ramp and pier, 3.35 m (11.0 ft) NNE of the center of the road, 1.52 m (5.0 ft) east of a witness post, 0.94 m (3.1 ft) NW of a power pole with guy wire, and 0.15 m (0.5 ft) below the road. The bench mark is crimped to the top of a stainless steel rod driven 11.0 m (36 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 5 Station ID: 8662245 PUBLICATION DATE: 02/09/2017 Name: OYSTER LANDING, CRAB HAUL CREEK SC NOAA Chart: 11532 Latitude: 33° 21.1' N ( 33.35170) USGS Quad: PLANTERSVILLE Longitude: 79° 11.2' W ( -79.18670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 2245 D 1982 DESIGNATION: 866 2245 D TIDAL MONUMENTATION: Tidal Station disk VM#: 16411 AGENCY: National Ocean Survey (NOS) IDB PID#: DD4668 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 33° 21.1' N ( 33.35170) LONGITUDE: 79° 11.6' W ( -79.19330) The bench mark is a disk set in top of a concrete monument near the boat sheds along the road leading to the lab boat ramp and pier, 22.56 m (74.0 ft) north of the center of the road, 7.13 m (23.4 ft) NE of the SW corner of the maintenance shed, 0.58 m (1.9 ft) east of the east corner of the shed, 6 cm (0.2 ft) below ground level, and about level with the road. BENCH MARK STAMPING: 2245 E 1982 DESIGNATION: 866 2245 E TIDAL MONUMENTATION: Tidal Station disk VM#: 16412 AGENCY: National Ocean Survey (NOS) IDB PID#: DD4667 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 33° 21.1' N ( 33.35170) LONGITUDE: 79° 11.6' W ( -79.19330) The bench mark is a disk set in top of a concrete monument near the boat sheds along the road leading to the lab boat ramp and pier, 49.38 m (162.0 ft) WNW of the west corner of the maintenance shed, 0.82 m (2.7 ft) WNW of the southernmost pole of the boat shed (Bay 1), 0.18 m (0.6 ft) SE of a witness post, and at ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8662245 PUBLICATION DATE: 02/09/2017 Name: OYSTER LANDING, CRAB HAUL CREEK SC NOAA Chart: 11532 Latitude: 33° 21.1' N ( 33.35170) USGS Quad: PLANTERSVILLE Longitude: 79° 11.2' W ( -79.18670) T I D A L D A T U M S Tidal datums at OYSTER LANDING, CRAB HAUL CREEK based on: LENGTH OF SERIES: 9 Years TIME PERIOD: 9/04-8/10 & 1/12-12/13 & 1/15-12/15 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8661070 SPRINGMAID PIER, ATLANTIC OCEAN Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (10/08/2016) = 2.971 MEAN HIGHER HIGH WATER MHHW = 1.557 MEAN HIGH WATER MHW = 1.450 North American Vertical Datum NAVD88 = 0.825 MEAN SEA LEVEL MSL = 0.817 MEAN TIDE LEVEL MTL = 0.754 MEAN LOW WATER MLW = 0.057 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (03/12/2005) = -0.582 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 2245 A 1982 1.747 0.297 2245 B 1982 2.327 0.877 2245 C 1982 2.553 1.103 2245 D 1982 1.907 0.457 2245 E 1982 2.235 0.785
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8662245 PUBLICATION DATE: 02/09/2017 Name: OYSTER LANDING, CRAB HAUL CREEK SC NOAA Chart: 11532 Latitude: 33° 21.1' N ( 33.35170) USGS Quad: PLANTERSVILLE Longitude: 79° 11.2' W ( -79.18670) 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.