U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8725331 PUBLICATION DATE: 07/26/2004 Name: OSTEGO BAY, ESTERO BAY FL NOAA Chart: 11426 Latitude: 26° 24.8' N ( 26.41330) USGS Quad: FORT MYERS BEACH Longitude: 81° 53.9' W ( -81.89830) To reach the tidal bench marks from the draw bridge over Big Carlos Pass, proceed WNW on County Road 865 (Estero Boulevard) for 2.4 km (1.5 mi) to the Fish Tale Marina at 7105 Estero Boulevard. The bench marks are located on the western and the southern sea walls of the marina. The tide gage and staff were located at the end of the walkway leading to a boat shed. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: NO 1 1973 DESIGNATION: 872 5331 TIDAL 1 MONUMENTATION: Tidal Station disk VM#: 8021 AGENCY: National Ocean Survey (NOS) IDB PID#: AD7858 SETTING CLASSIFICATION: Concrete sea wall OPUS PID: LATITUDE: 26° 24.8' N ( 26.41330) LONGITUDE: 81° 54.0' W ( -81.90000) The primary bench mark is a disk set flush in the concrete sea wall south of a boat lift, 21.28 m (69.8 ft) north of bench mark NO 2 1973, and 18.71 m (61.4 ft) north of the south edge of a walkway leading to the boathouse. BENCH MARK STAMPING: NO 2 1973 DESIGNATION: 872 5331 TIDAL 2 MONUMENTATION: Tidal Station disk VM#: 8022 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete sea wall OPUS PID: LATITUDE: 26° 24.8' N ( 26.41330) LONGITUDE: 81° 53.9' W ( -81.89830) The bench mark is a disk set flush in the concrete sea wall south of a boat lift, 28.44 m (93.3 ft) north of bench mark NO 3 1973, 21.28 m (69.8 ft) south of bench mark NO 1 1973, and 2.56 m (8.4 ft) south of the south edge of a walkway leading to the boathouse.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 8725331 PUBLICATION DATE: 07/26/2004 Name: OSTEGO BAY, ESTERO BAY FL NOAA Chart: 11426 Latitude: 26° 24.8' N ( 26.41330) USGS Quad: FORT MYERS BEACH Longitude: 81° 53.9' W ( -81.89830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 3 1973 DESIGNATION: 872 5331 TIDAL 3 MONUMENTATION: Tidal Station disk VM#: 8023 AGENCY: National Ocean Survey (NOS) IDB PID#: AD7859 SETTING CLASSIFICATION: Concrete sea wall OPUS PID: LATITUDE: 26° 24.8' N ( 26.41330) LONGITUDE: 81° 54.0' W ( -81.90000) The bench mark is a disk set flush in the concrete sea wall, 28.44 m (93.3 ft) south of bench mark NO 2 1973, 7.47 m (24.5 ft) west of the NW corner of the boat shed, and 1.25 m (4.1 ft) south of the south edge of the walkway leading to the boat shed. NOTE: Mark not found in 1996 and 1998 by US Power Squadron. BENCH MARK STAMPING: NO 4 1973 DESIGNATION: 872 5331 TIDAL 4 MONUMENTATION: Tidal Station disk VM#: 8024 AGENCY: National Ocean Survey (NOS) IDB PID#: AD7860 SETTING CLASSIFICATION: Concrete sea wall OPUS PID: LATITUDE: 26° 24.8' N ( 26.41330) LONGITUDE: 81° 54.0' W ( -81.90000) The bench mark is a disk set flush in the concrete sea wall at the SW corner of the marina, 37.25 m (122.2 ft) south of bench mark NO 3 1973, 19.35 m (63.5 ft) west of bench mark NO 5 1973, and 1.10 m (3.6 ft) north of the south end of the sea wall. NOTE: Mark not found in 1996 and 1998 by US Power Squadron.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 8725331 PUBLICATION DATE: 07/26/2004 Name: OSTEGO BAY, ESTERO BAY FL NOAA Chart: 11426 Latitude: 26° 24.8' N ( 26.41330) USGS Quad: FORT MYERS BEACH Longitude: 81° 53.9' W ( -81.89830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 5 1973 DESIGNATION: 872 5331 TIDAL 5 MONUMENTATION: Tidal Station disk VM#: 8025 AGENCY: National Ocean Survey (NOS) IDB PID#: AD7861 SETTING CLASSIFICATION: Concrete sea wall OPUS PID: LATITUDE: 26° 24.8' N ( 26.41330) LONGITUDE: 81° 54.0' W ( -81.90000) The bench mark is a disk set flush in the concrete sea wall, 19.35 m (63.5 ft) east of the SW corner of the sea wall, and 19.35 m (63.5 ft) east of bench mark NO 4 1973. NOTE: Mark not found in 1996 and 1998 by US Power Squadron.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8725331 PUBLICATION DATE: 07/26/2004 Name: OSTEGO BAY, ESTERO BAY FL NOAA Chart: 11426 Latitude: 26° 24.8' N ( 26.41330) USGS Quad: FORT MYERS BEACH Longitude: 81° 53.9' W ( -81.89830) T I D A L D A T U M S Tidal datums at OSTEGO BAY, ESTERO BAY based on: LENGTH OF SERIES: 1 MONTH TIME PERIOD: June 1973 - June 1973 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8725110 NAPLES, GULF OF MEXICO Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 0.758 MEAN HIGH WATER MHW = 0.675 MEAN SEA LEVEL MSL = 0.417 MEAN TIDE LEVEL MTL = 0.408 MEAN LOW WATER MLW = 0.141 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW NO 1 1973 1.441 0.766 NO 2 1973 1.445 0.770 NO 3 1973 1.423 0.748 NO 4 1973 1.485 0.810 NO 5 1973 1.236 0.561
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8725331 PUBLICATION DATE: 07/26/2004 Name: OSTEGO BAY, ESTERO BAY FL NOAA Chart: 11426 Latitude: 26° 24.8' N ( 26.41330) USGS Quad: FORT MYERS BEACH Longitude: 81° 53.9' W ( -81.89830) 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.