U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 8 Station ID: 8720686 PUBLICATION DATE: 08/29/2017 Name: FORT MATANZAS FL NOAA Chart: 11486 Latitude: 29° 42.9' N ( 29.71500) USGS Quad: MANTANZAS Longitude: 81° 14.3' W ( -81.23830) To reach the tidal bench marks from Marineland, proceed 5.6 km (3.5 mi) NNW on State Highway A1A to the Fort Matanzas National Monument entrance at 8635 A1A S, then west to Fort Matanzas Visitors Center. The bench marks are located within the park. The tide gauge and staff are located on the Fort Matanzas National Monument dock. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 1 1974 DESIGNATION: 872 0686 TIDAL 1 MONUMENTATION: Tidal Station disk VM#: 5232 AGENCY: National Ocean Survey (NOS) IDB PID#: AQ1557 SETTING CLASSIFICATION: Rock wall OPUS PID: LATITUDE: 29° 42.9' N ( 29.71472) LONGITUDE: 81° 14.0' W ( -81.23333) The primary bench mark is a disk set flush in the top of a 0.43 m (1.4 ft) thick coquina wall at the SE corner of a raised 1.80 m by 4.66 m (5.9 ft by 15.3 ft) garden box north of the north face of the visitors center building, in the top center of a 0.76 m (2.5 ft) coquina fence wall at the SE corner of a garden box; 13.72 m (45.0 ft) north of the north face of the Visitors Center building; 4.42 m (14.5 ft) south of the SE corner of the rangers office building; 0.46 m (1.5 ft) below and 0.30 m (1.0 ft) west of the top of a 1.37 m (4.5 ft) high coquina fence wall, and 0.91 m (3.0 ft) above the ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 8 Station ID: 8720686 PUBLICATION DATE: 08/29/2017 Name: FORT MATANZAS FL NOAA Chart: 11486 Latitude: 29° 42.9' N ( 29.71500) USGS Quad: MANTANZAS Longitude: 81° 14.3' W ( -81.23830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: Q 321 1970 DESIGNATION: Q 321 MONUMENTATION: Tidal Station disk VM#: 5231 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: AQ0448 SETTING CLASSIFICATION: Concrete monument OPUS PID#: AQ0448 LATITUDE: 29° 43.0' N ( 29.71722) LONGITUDE: 81° 14.0' W ( -81.23389) The bench mark is a disk set in the top of concrete monument, 0.06 m (0.2 ft) below the level of the ground, 46.76 m (153.4 ft) north of the centerline of the entrance road to Fort Matanzas National Monument, 13.17 m (43.2 ft) west of the centerline of State Road A1A, 12.19 m (40.0 ft) south of the center of a private drive at 8585 State Road A1A, 10.15 m (33.3 ft) south of the south edge of a concrete driveway at 8585 State Road A1A, 7.44 m (24.4 ft) north of wood power pole No. 35411440, 4.1 m (13.4 ft) SE of a 15.24 m by 15.24 m (6 in by 6 in) concrete right of way marker projecting 0.30 m (1.0 ft) above the ground, 1.83 m (6.0 ft) north of a 15.24 m by 12.70 m (6 in by 5 in) concrete marker projecting 1.8 m (1.8 ft) above the level of the ground, 1.07 m (3.5 ft) west of the west edge of a 1.83 m (6.0 ft) concrete sidewalk, 0.61 m (2.0 ft) NE of a metal witness post, and 0.30 m (1.0 ft) east of a carsonite witness post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 8 Station ID: 8720686 PUBLICATION DATE: 08/29/2017 Name: FORT MATANZAS FL NOAA Chart: 11486 Latitude: 29° 42.9' N ( 29.71500) USGS Quad: MANTANZAS Longitude: 81° 14.3' W ( -81.23830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 2 1974 DESIGNATION: 872 0686 TIDAL 2 MONUMENTATION: Survey disk VM#: 5233 AGENCY: National Ocean Survey (NOS) IDB PID#: AQ1556 SETTING CLASSIFICATION: Rock retaining wall OPUS PID: LATITUDE: 29° 42.9' N ( 29.71472) LONGITUDE: 81° 14.2' W ( -81.23667) The bench mark is a disk set flush in the coquina retaining wall, 1.49 m (4.9 ft) above the level of the concrete sidewalk, in a coquina retaining wall near the tunnel through the Visitors Center building; 22.01 m (72.2 ft) SW of the centerline of the entrance road, 2.99 m (9.8 ft) SE of the center of the east side of the tunnel, and 0.21 m (0.7 ft) NE of the northeast face of the visitors center building. BENCH MARK STAMPING: 3 1974 DESIGNATION: 872 0686 TIDAL 3 MONUMENTATION: Tidal Station disk VM#: 5234 AGENCY: National Ocean Survey (NOS) IDB PID#: AQ1555 SETTING CLASSIFICATION: Rock culvert OPUS PID: LATITUDE: 29° 42.9' N ( 29.71528) LONGITUDE: 81° 14.0' W ( -81.23389) The bench mark is a disk set flush in the top center on the west side of the culvert and 0.49 m (1.6 ft) below the level of the park entrance road, in the top center at the west end of an 2.44 m (8.0 ft) long coquina culvert located near the center of the north side of the park area circled by the drive; 83.21 m (273.0 ft) east of the Visitors Center building; 42.45 m (139.3 ft) north of the NE corner of the park restrooms building; south of the centerline of the park entrance road and 0.30 m (1.0 ft) east of the west end of the culvert.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 8 Station ID: 8720686 PUBLICATION DATE: 08/29/2017 Name: FORT MATANZAS FL NOAA Chart: 11486 Latitude: 29° 42.9' N ( 29.71500) USGS Quad: MANTANZAS Longitude: 81° 14.3' W ( -81.23830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 0686 A 2005 DESIGNATION: 872 0686 A TIDAL MONUMENTATION: Flange-encased Rod VM#: 19381 AGENCY: FL Department of Environmental Protection (FLDEP) IDB PID#: SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 29° 43.3' N ( 29.72167) LONGITUDE: 81° 14.0' W ( -81.23333) The bench mark is a flange-encased rod located 36.45 m (119.6 ft) south of the approximate centerline of the entrance road to the Fort Matanzas National Monument, 28.65 m (94.0 ft) NE of a fire hydrant, 13.11 m (43.0 ft) west of the approximate centerline of State Highway A1A, 9.75 m (32.0 ft) NE of a concrete right of way marker, 1.62 m (5.3 ft) west of a 1.83 m (6.0 ft) concrete sidewalk and 0.91 m (3.0 ft) north of a wooden power pole with stamping KOP GA SPSKS 4-04 3-45 FPL. The datum point is recessed 0.09 m (0.3 ft) below the level of the NGS logo cap, being the top of a stainless steel rod, driven to refusal at a depth of 12.07 m (39.6 ft) encased in a 5-inch NGS logo cap flush with the ground. A carsonite witness post has been driven on the east side of the power pole projecting 0.30 m (1.0 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 8 Station ID: 8720686 PUBLICATION DATE: 08/29/2017 Name: FORT MATANZAS FL NOAA Chart: 11486 Latitude: 29° 42.9' N ( 29.71500) USGS Quad: MANTANZAS Longitude: 81° 14.3' W ( -81.23830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: COVEF 1934 1978 DESIGNATION: COVE RESET MONUMENTATION: Tidal Station disk VM#: 19382 AGENCY: National Geodetic Survey (NGS) IDB PID#: AQ0452 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 29° 41.9' N ( 29.69861) LONGITUDE: 81° 13.6' W ( -81.22611) The bench mark is a disk set in the top of a round concrete monument recessed 0.03 m (0.1 ft) below the level of the ground and 2.44 m (8.0 ft) below the level of State Highway A1A, 27.58 m (90.5 ft) north of the centerline of Gene Johnson Road, 27.10 m (88.9 ft) south of the center of a driveway, 18.20 m (59.7 ft) east of the centerline of A1A, and 0.40 m (1.3 ft) west of a metal witness post. NOTES: A magnet was embedded in the ground on the south side of the monument. Stamping is COVEF 1934 1978.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 8 Station ID: 8720686 PUBLICATION DATE: 08/29/2017 Name: FORT MATANZAS FL NOAA Chart: 11486 Latitude: 29° 42.9' N ( 29.71500) USGS Quad: MANTANZAS Longitude: 81° 14.3' W ( -81.23830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: COVE 1934 1978 DESIGNATION: COVE AZ MK MONUMENTATION: Tidal Station disk VM#: 19383 AGENCY: National Geodetic Survey (NGS) IDB PID#: SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 29° 42.1' N ( 29.70139) LONGITUDE: 81° 13.6' W ( -81.22722) The bench mark is a disk set in the top of a round concrete monument recessed 0.09 m (0.3 ft) below the level of the ground and 0.30 m (1.0 ft) below the level of State Highway A1A, 15.73 m (51.6 ft) west of the centerline of State Highway A1A, 7.62 m (25.0 ft) south of the approximate centerline of a driveway at 8911 A1A South, 4.72 m (15.5 ft) NW of a power pole and 0.40 m (1.3 ft) east of a wire fence and a metal witness post. NOTE: A magnet was embedded in the ground on the south side of the monument.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 8 Station ID: 8720686 PUBLICATION DATE: 08/29/2017 Name: FORT MATANZAS FL NOAA Chart: 11486 Latitude: 29° 42.9' N ( 29.71500) USGS Quad: MANTANZAS Longitude: 81° 14.3' W ( -81.23830) T I D A L D A T U M S Tidal datums at FORT MATANZAS based on: LENGTH OF SERIES: 1 YEAR TIME PERIOD: May 1974 - April 1975 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8720220 MAYPORT (FERRY DEPOT), SAINT JOHNS RIVER Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (10/06/1974) = 2.027 MEAN HIGHER HIGH WATER MHHW = 1.326 MEAN HIGH WATER MHW = 1.231 North American Vertical Datum NAVD88 = 0.807 MEAN SEA LEVEL MSL = 0.667 MEAN TIDE LEVEL MTL = 0.644 MEAN LOW WATER MLW = 0.056 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (02/26/1975) = -0.530 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 1 1974 4.057 2.826 Q 321 1970 4.686 3.455 2 1974 4.740 3.509 3 1974 2.730 1.499 0686 A 2005 4.379 3.148 COVEF 1934 1978 2.394 1.163 COVE 1934 1978 2.461 1.230 Foot Notes: Bench marks 0686 A 2005, COVEF 1934 1978, and COV 1934 1978 are based on one differential leveling connection and do not meet the quality control standards of the NOS. Therefore, caution should be used when deriving elevations for these marks.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 8 of 8 Station ID: 8720686 PUBLICATION DATE: 08/29/2017 Name: FORT MATANZAS FL NOAA Chart: 11486 Latitude: 29° 42.9' N ( 29.71500) USGS Quad: MANTANZAS Longitude: 81° 14.3' W ( -81.23830) 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.