U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 7 Station ID: 8723747 PUBLICATION DATE: 04/01/2004 Name: TAVERNIER HAWK CHANNEL FL NOAA Chart: 11463 Latitude: 25° 0.3' N ( 25.00500) USGS Quad: TAVERNIER Longitude: 80° 31.0' W ( -80.51670) To reach the tidal bench marks from the post office at Tavernier, proceed about 0.6 km (0.4 mi) SW on U.S. Highway 1 to the intersection of U.S. Highway 1 and Lowe Street, then 0.5 km (0.3 mi) south along Lowe Street to Point Lowe. The bench marks are located near the boat dock, south of the road, and adjacent to the intersection of U.S. Highway 1 and Ocean Boulevard. The tide gage and staff were located on the boat dock at the boat slip at the end of Lowe Street. T I D A L B E N C H M A R K S
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 7 Station ID: 8723747 PUBLICATION DATE: 04/01/2004 Name: TAVERNIER HAWK CHANNEL FL NOAA Chart: 11463 Latitude: 25° 0.3' N ( 25.00500) USGS Quad: TAVERNIER Longitude: 80° 31.0' W ( -80.51670) T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: LOWE RM 1 1934 DESIGNATION: LOWE RM 1 MONUMENTATION: Reference Mark disk VM#: 5999 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: AC0440 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 25° 0.2' N ( 25.00330) LONGITUDE: 80° 31.1' W ( -80.51830) The primary bench mark is a disk set in the top of a 0.30 m x 0.30 m (1.0 ft x 1.0 ft) concrete post, located near Dressing Point SE of Tavernier, 0.2 km (0.1 mi) south of the boat dock, 27 m (88 ft) NW of the edge of the water, and 0.15 m (0.5 ft) above the level of a coral rock. BENCH MARK STAMPING: NO 1 1935 DESIGNATION: 872 3747 TIDAL 1 MONUMENTATION: Tidal Station disk VM#: 6000 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: AC0441 SETTING CLASSIFICATION: Concrete filled terra cotta pipe OPUS PID: LATITUDE: 25° 0.2' N ( 25.00330) LONGITUDE: 80° 31.0' W ( -80.51670) The bench mark is a disk set in the top of a 0.15 m (0.5 ft) diameter terra cotta pipe filled with concrete, located near Point Lowe in the vicinity of the boat dock, 20 m (67 ft) south of the centerline of Lowe Street, 14.69 m (48.2 ft) NW of a 2-inch iron pipe which supports a gas yard light, 12.65 m (41.5 ft) south of a power pole, 11.13 m (36.5 ft) east of the centerline of the driveway to the Dressing residence, 5.52 m (18.1 ft) north of the NE corner of the house, 0.3 m (1 ft) west of the extended east wall of the house, level with the street, and 0.18 m (0.6 ft) below ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 7 Station ID: 8723747 PUBLICATION DATE: 04/01/2004 Name: TAVERNIER HAWK CHANNEL FL NOAA Chart: 11463 Latitude: 25° 0.3' N ( 25.00500) USGS Quad: TAVERNIER Longitude: 80° 31.0' W ( -80.51670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: U 327 1970 DESIGNATION: U 327 MONUMENTATION: Bench Mark disk VM#: 6001 AGENCY: National Geodetic Survey (NGS) IDB PID#: AC0444 SETTING CLASSIFICATION: Boulder OPUS PID: LATITUDE: 25° 0.2' N ( 25.00330) LONGITUDE: 80° 31.0' W ( -80.51670) The bench mark is a disk set in the top of a large coral boulder, located near Point Lowe at the SW corner of the boat, 14 m (45 ft) NE of the north corner of a guard rail at the end of the dock, 12 m (39 ft) east of a light pole, 0.30 m (1.0 ft) north of a wooden guard rail, about 1 m (2 ft) above the level of Lowe Street, and 0.46 m (1.5 ft) above the level of the dock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 7 Station ID: 8723747 PUBLICATION DATE: 04/01/2004 Name: TAVERNIER HAWK CHANNEL FL NOAA Chart: 11463 Latitude: 25° 0.3' N ( 25.00500) USGS Quad: TAVERNIER Longitude: 80° 31.0' W ( -80.51670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: V 327 1970 DESIGNATION: V 327 MONUMENTATION: Bench Mark disk VM#: 6002 AGENCY: National Geodetic Survey (NGS) IDB PID#: AC0443 SETTING CLASSIFICATION: Boulder OPUS PID: LATITUDE: 25° 0.2' N ( 25.00330) LONGITUDE: 80° 31.0' W ( -80.51670) The bench mark is a disk set in the top of a 1 m (4 ft) coral boulder, located near Point Lowe in the vicinity of the boat dock, 45 m (147 ft) south of the south end of a metal guard rail at the end of Lowe Street, 39 m (127 ft) SE of the SE corner of a two-story house, 0.30 m (1.0 ft) above ground, and about level with Lowe Street. BENCH MARK STAMPING: 3747 F 1982 DESIGNATION: 872 3747 F TIDAL MONUMENTATION: Tidal Station disk VM#: 6003 AGENCY: Florida Department of Natural Resources (FLDNR) IDB PID#: AC3363 SETTING CLASSIFICATION: Concrete foundation OPUS PID: LATITUDE: 25° 0.3' N ( 25.00500) LONGITUDE: 80° 31.3' W ( -80.52170) The bench mark is a disk set in the top of the west corner of a 6 m x 3 m (20 ft x 11 ft) concrete foundation for the water pipe line, located near the intersection of U.S. Highway 1 and Ocean Boulevard, 22 m (72 ft) NW of the intersection of U.S. Highway 1 and Ocean Boulevard, 2.53 m (8.3 ft) SSE of the curb of the southbound lane of U.S. Highway 1, SE of McDonalds restaurant, and about level with the ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 7 Station ID: 8723747 PUBLICATION DATE: 04/01/2004 Name: TAVERNIER HAWK CHANNEL FL NOAA Chart: 11463 Latitude: 25° 0.3' N ( 25.00500) USGS Quad: TAVERNIER Longitude: 80° 31.0' W ( -80.51670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 3747 G 1982 DESIGNATION: 872 3747 G TIDAL MONUMENTATION: Tidal Station disk VM#: 6004 AGENCY: Florida Department of Natural Resources (FLDNR) IDB PID#: AC3364 SETTING CLASSIFICATION: Concrete foundation OPUS PID: LATITUDE: 25° 0.3' N ( 25.00500) LONGITUDE: 80° 31.0' W ( -80.51670) The bench mark is a disk set in the top of the concrete foundation for a power pole, located near the intersection of U.S. Highway 1 and Ocean Boulevard, 113 m (370 ft) SW of the centerline of Ocean Boulevard, 25.48 m (83.6 ft) SE of the SE side of U.S. Highway 1, south of McDonalds restaurant, and 0.46 m (1.5 ft) above the level of the ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 7 Station ID: 8723747 PUBLICATION DATE: 04/01/2004 Name: TAVERNIER HAWK CHANNEL FL NOAA Chart: 11463 Latitude: 25° 0.3' N ( 25.00500) USGS Quad: TAVERNIER Longitude: 80° 31.0' W ( -80.51670) T I D A L D A T U M S Tidal datums at TAVERNIER HAWK CHANNEL based on: LENGTH OF SERIES: 1 YEAR TIME PERIOD: January 1971 - December 1971 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8724580 KEY WEST Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (11/02/1971) = 0.973 MEAN HIGHER HIGH WATER MHHW = 0.716 MEAN HIGH WATER MHW = 0.681 North American Vertical Datum NAVD88 = 0.638 MEAN SEA LEVEL MSL = 0.376 MEAN TIDE LEVEL MTL = 0.370 MEAN LOW WATER MLW = 0.058 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (02/10/1971) = -0.438 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW LOWE RM 1 1934 0.880 0.199 NO 1 1935 1.248 0.567 U 327 1970 1.808 1.127 V 327 1970 1.287 0.606 3747 F 1982 2.838 2.157 3747 G 1982 1.368 0.687
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 7 Station ID: 8723747 PUBLICATION DATE: 04/01/2004 Name: TAVERNIER HAWK CHANNEL FL NOAA Chart: 11463 Latitude: 25° 0.3' N ( 25.00500) USGS Quad: TAVERNIER Longitude: 80° 31.0' W ( -80.51670) 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.