U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8728311 PUBLICATION DATE: 05/20/2004 Name: ST. TERESA BEACH FL NOAA Chart: 11405 Latitude: 29° 55.7' N ( 29.92830) USGS Quad: ST. TERESA BEACH Longitude: 84° 26.8' W ( -84.44670) To reach the tidal bench marks from the south end of the U.S. Highway 98 bridge over Ochlockonee Bay, proceed south and west on U.S. Highway 98 for 9.5 km (5.9 mi) to a dirt road on the right and a set of multiple driveways to the left. The bench marks are in the area around the driveways. The tide gage and staff were located on the NW corner of a boat landing platform at the SE end of a 107 m (350 ft) long dock on Alligator Harbor in front of the Bickerstaff beach house (the second driveway on the left in the set of multiple driveways). T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 8311 A 1976 DESIGNATION: 872 8311 A TIDAL MONUMENTATION: Tidal Station disk VM#: 9804 AGENCY: Florida Department of Natural Resources (FLDNR) IDB PID#: AS0913 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 29° 55.8' N ( 29.93000) LONGITUDE: 84° 26.9' W ( -84.44830) The primary bench mark is a disk located 55 m (180 ft) SE of the Laing beach house (second driveway to the left in the set of multiple driveways), 50.02 m (164.1 ft) SE of the Bickerstaff beach house, 5.67 m (18.6 ft) south of a line of pine trees running east-west, and 0.67 m (2.2 ft) west of the beginning of the dock. The bench mark is crimped to the top of a copper-clad steel rod driven 7.3 m (24 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: 8728311 PUBLICATION DATE: 05/20/2004 Name: ST. TERESA BEACH FL NOAA Chart: 11405 Latitude: 29° 55.7' N ( 29.92830) USGS Quad: ST. TERESA BEACH Longitude: 84° 26.8' W ( -84.44670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: THERESA 1935 DESIGNATION: THERESA MONUMENTATION: Triangulation Station disk VM#: 9803 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: AS0620 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 29° 55.8' N ( 29.93000) LONGITUDE: 84° 26.9' W ( -84.44830) The bench mark is a disk set in the top of a concrete monument, along the third driveway to the left in the set of multiple driveways, 43 m (140 ft) north of the gate to a beach cottage at the south end of the third driveway on the left, 6.49 m (21.3 ft) west of the centerline of the drive, and 0.24 m (0.8 ft) east of a metal witness post. BENCH MARK STAMPING: 8311 B 1976 DESIGNATION: 872 8311 B TIDAL MONUMENTATION: Tidal Station disk VM#: 9805 AGENCY: Florida Department of Natural Resources (FLDNR) IDB PID#: AS0912 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 29° 55.8' N ( 29.93000) LONGITUDE: 84° 26.9' W ( -84.44830) The bench mark is a disk located south on the second driveway to the left in the set of mutiple driveways, in the middle of a triangular shaped median bordered by three drives,16.82 m (55.2 ft) north of a fence line, 10.91 m (35.8 ft) east of the certerline of the north-south drive, 7.10 m (23.3 ft) SW of the centerline of the NW-SE drive, and 6.95 m (22.8 ft) north of the center of the east/west drive. The bench mark is crimped to the top of a copper-clad steel rod driven an unspecified depth 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: 8728311 PUBLICATION DATE: 05/20/2004 Name: ST. TERESA BEACH FL NOAA Chart: 11405 Latitude: 29° 55.7' N ( 29.92830) USGS Quad: ST. TERESA BEACH Longitude: 84° 26.8' W ( -84.44670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 8311 C 1976 DESIGNATION: 872 8311 C TIDAL MONUMENTATION: Tidal Station disk VM#: 9806 AGENCY: Florida Department of Natural Resources (FLDNR) IDB PID#: AS0364 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 29° 56.0' N ( 29.93330) LONGITUDE: 84° 27.0' W ( -84.45000) The bench mark is a disk located 13.35 m (43.8 ft) east of the centerline of a dirt road, 11.37 m (37.3 ft) north of the centerline of U.S. Highway 98, 4 m (13 ft) NW of a highway information sign, and 0.49 m (1.6 ft) west of a metal witness post. The bench mark is set at ground level, crimped to the top of a copper-clad steel rod driven 15.2 m (50 ft) to refusal, and encased in a 4-inch diameter PVC pipe and concrete kickblock. NOTE: Mark not found in 1998 by US Power Squadron. BENCH MARK STAMPING: 8311 D 1976 DESIGNATION: 872 8311 D TIDAL MONUMENTATION: Tidal Station disk VM#: 9807 AGENCY: Florida Department of Natural Resources (FLDNR) IDB PID#: AS0911 SETTING CLASSIFICATION: Concrete culvert head wall OPUS PID: LATITUDE: 29° 56.0' N ( 29.93330) LONGITUDE: 84° 27.1' W ( -84.45170) The bench mark is a disk set in the top of the east end of a concrete culvert head wall, 0.5 km (0.3 mi) west of the junction of the driveways and U.S. Highway 98, 6.92 m (22.7 ft) south of the centerline of the highway, and 0.46 m (1.5 ft) below the level of the highway
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8728311 PUBLICATION DATE: 05/20/2004 Name: ST. TERESA BEACH FL NOAA Chart: 11405 Latitude: 29° 55.7' N ( 29.92830) USGS Quad: ST. TERESA BEACH Longitude: 84° 26.8' W ( -84.44670) T I D A L D A T U M S Tidal datums at ST. TERESA BEACH based on: LENGTH OF SERIES: 2 MONTHS TIME PERIOD: April 1976 - May 1976 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8728360 TURKEY POINT Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 0.837 MEAN HIGH WATER MHW = 0.773 North American Vertical Datum NAVD88 = 0.494 MEAN TIDE LEVEL MTL = 0.476 MEAN SEA LEVEL MSL = 0.460 MEAN LOW WATER MLW = 0.178 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 8311 A 1976 2.208 1.435 THERESA 1935 6.687 5.914 8311 B 1976 6.798 6.025 8311 C 1976 5.494 4.721 8311 D 1976 4.053 3.280
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8728311 PUBLICATION DATE: 05/20/2004 Name: ST. TERESA BEACH FL NOAA Chart: 11405 Latitude: 29° 55.7' N ( 29.92830) USGS Quad: ST. TERESA BEACH Longitude: 84° 26.8' W ( -84.44670) 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.