U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 PUBLICATION DATE: 03/09/1989 Station ID: 8725366 SUPERCEDED DATE: 04/21/2003 Name: ESTERO ISLAND, MATANZAS PASS FLORIDA NOAA Chart: 11426 Latitude: 26° 27.4' N USGS Quad: FORT MYERS BEACH Longitude: 81° 57.2' W To reach the tidal bench marks from the State Highway 865 swing bridge over Matanzas Pass, proceed south on State Highway 865 and take the first right turn to Beach Marina at the SE end of the bridge. The bench marks are located near the marina and on the west side of Highway 865. The tide gage and staff were located near the shoreward end of the marina pier. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: BM 2 1965 MONUMENTATION: Survey Disk VM#: 7299 AGENCY: PID#: AD1372 SETTING CLASSIFICATION: Concrete Sea Wall The bench mark is set flush in the top of the sea wall at Beach Marina, 162 feet (49 m) east of Bench Mark BM 1 1965, 50 feet (15 m) west of a curve in the sea wall, and 44 feet (13 m) east of the east edge of the boat dock. BENCH MARK STAMPING: BM 1 1965 MONUMENTATION: Survey Disk VM#: 7298 AGENCY: PID#: AD1373 SETTING CLASSIFICATION: Concrete Sea Wall The bench mark is set flush in the top of a concrete sea wall at Beach Marina, 135 feet (41 m) east of the centerline of the highway measured from the south end of the bridge, 90 feet (27 m) NW of a utility pole with transformer, 29.5 feet (9.0 m) NE of the NE corner of the marina, and 2 feet (1 m) east of the east edge of the boat dock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 PUBLICATION DATE: 03/09/1989 Station ID: 8725366 SUPERCEDED DATE: 04/21/2003 Name: ESTERO ISLAND, MATANZAS PASS FLORIDA NOAA Chart: 11426 Latitude: 26° 27.4' N USGS Quad: FORT MYERS BEACH Longitude: 81° 57.2' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 3 1965 MONUMENTATION: Survey Disk VM#: 7300 AGENCY: PID#: AD1374 SETTING CLASSIFICATION: Concrete Flag Pole Base The bench mark is set flush in the top of a 4-foot (1 m) square concrete base of the parking lot flag pole, 75 feet (23 m) north of the NW post on an open boat shed, 73 feet (22 m) west of the centerline of the highway, and 18 feet (5 m) SW of the approximate shoreline. BENCH MARK STAMPING: 5366 D 1984 MONUMENTATION: Survey Disk VM#: 7301 AGENCY: PID#: AD7850 SETTING CLASSIFICATION: Bridge Pier The bench mark is set in the foundation for the seventh bridge pier north of the south end of the bridge, 11 feet (3 m) NW of the steps to the catwalk under the bridge, and 1.5 feet (0.5 m) west of the westernmost pile. BENCH MARK STAMPING: 5366 E 1984 MONUMENTATION: Survey Disk VM#: 7302 AGENCY: PID#: AD7851 SETTING CLASSIFICATION: Loading Platform The bench mark is set in the top of the loading platform at the U.S. Post Office in Fort Myers Beach, 3 feet (1 m) SE of the north corner of the post office.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 PUBLICATION DATE: 03/09/1989 Station ID: 8725366 SUPERCEDED DATE: 04/21/2003 Name: ESTERO ISLAND, MATANZAS PASS FLORIDA NOAA Chart: 11426 Latitude: 26° 27.4' N USGS Quad: FORT MYERS BEACH Longitude: 81° 57.2' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5366 F MONUMENTATION: Survey Disk VM#: 7303 AGENCY: PID#: AD7852 SETTING CLASSIFICATION: Bridge Rail The bench mark is set in the top of the bridge rail over the SW abutment of the bridge, 350 feet (107 m) NE of the SW end of the railing, and 20.5 feet (6.2 m) SE of the centerline of the bridge. BENCH MARK STAMPING: 5366 G MONUMENTATION: Survey Disk VM#: 7304 AGENCY: PID#: AD7844 SETTING CLASSIFICATION: Bridge Rail The bench mark is set in the top of the bridge rail over the NE abutment of the bridge, 250 feet (76 m) SW of the NE end of the railing, and 21 feet (6 m) NW of the centerline of the bridge.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 PUBLICATION DATE: 03/09/1989 Station ID: 8725366 SUPERCEDED DATE: 04/21/2003 Name: ESTERO ISLAND, MATANZAS PASS FLORIDA NOAA Chart: 11426 Latitude: 26° 27.4' N USGS Quad: FORT MYERS BEACH Longitude: 81° 57.2' W T I D A L D A T U M S Tidal datums at ESTERO ISLAND, MATANZAS PASS based on: LENGTH OF SERIES: 12 MONTHS TIME PERIOD: JUNE 1965-MAY 1966 TIDAL EPOCH: 1960-1978 CONTROL TIDE STATION: 8725110 NAPLES Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET: HIGHEST OBSERVED WATER LEVEL (09/09/1965) = 4.52 MEAN HIGHER HIGH WATER MHHW = 2.70 MEAN HIGH WATER MHW = 2.44 MEAN TIDE LEVEL MTL = 1.49 * NATIONAL GEODETIC VERTICAL DATUM NGVD29 = 1.04 MEAN LOW WATER MLW = 0.55 MEAN LOWER LOW WATER MLLW = 0.00 LOWEST OBSERVED WATER LEVEL (02/05/1966) = -1.74 * NGVD reference based on elevations published in Quad 260813, 1969, and NOS leveling of 1974. North American Vertical Datum (NAVD88) Bench Mark Elevation Information In FEET above: Stamping or Designation MLLW MHW BM 2 1965 4.50 2.06 BM 1 1965 4.48 2.04 NO 3 1965 7.28 4.84 5366 D 1984 4.60 2.16 5366 E 1984 8.08 5.64 5366 F 24.83 22.39 5366 G 24.69 22.25
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 PUBLICATION DATE: 03/09/1989 Station ID: 8725366 SUPERCEDED DATE: 04/21/2003 Name: ESTERO ISLAND, MATANZAS PASS FLORIDA NOAA Chart: 11426 Latitude: 26° 27.4' N USGS Quad: FORT MYERS BEACH Longitude: 81° 57.2' W 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 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.