U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8725319 PUBLICATION DATE: 11/13/2003 Name: COCONUT POINT, ESTERO BAY FL NOAA Chart: 11426 Latitude: 26° 24.0' N ( 26.40000) USGS Quad: ESTERO Longitude: 81° 50.6' W ( -81.84330) To reach the tidal bench marks from the U.S. Highway 41 bridge over Imperial River, proceed 5.6 km (3.5 mi) north on U.S. Highway 41 to Coconut Road, then 2.9 km (1.8 mi) west on Coconut Road to its end at Coconut Ice House. The bench marks are in the vicinity of Coconut Ice House and an abandoned church. The tide gauge and staff were off the Coconut Ice House dock. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: NO 3 1965 DESIGNATION: 872 5319 TIDAL 3 MONUMENTATION: Tidal Station disk VM#: 7882 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: AD1330 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 26° 23.9' N ( 26.39830) LONGITUDE: 81° 50.4' W ( -81.84000) The primary bench mark is a disk set in the top of a concrete monument at the SW corner of an abandoned church, 19 m (63 ft) NE of the centerline of Coconut Road, 12.34 m (40.5 ft) east of the centerline of the gravel road to the ice house, 12 m (39 ft) SW of the front steps of the abandoned church, 0.76 m (2.5 ft) west of a telephone pole, and 0.09 m (0.3 ft) above ground level. NOTE: Mark not found by US Power Squadron in 1991, 1992 and 1998.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 8725319 PUBLICATION DATE: 11/13/2003 Name: COCONUT POINT, ESTERO BAY FL NOAA Chart: 11426 Latitude: 26° 24.0' N ( 26.40000) USGS Quad: ESTERO Longitude: 81° 50.6' W ( -81.84330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: J 246 1965 DESIGNATION: J 246 MONUMENTATION: Bench Mark disk VM#: 7883 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: AD1329 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 26° 23.9' N ( 26.39830) LONGITUDE: 81° 50.1' W ( -81.83500) The bench mark is 0.2 km (0.1 mi) east of bench mark 5319 E 1984, 9.08 m (29.8 ft) north of the centerline of Coconut Road, 1 m (3 ft) east of the eighth telephone pole east of where the road turns north, and 0.30 m (1.0 ft) east of a witness post. The bench mark is crimped to the top of a copper-clad steel rod driven 24.4 m (80 ft) to refusal, and encased in a steel pipe projecting 0.12 m (0.4 ft) above ground level. BENCH MARK STAMPING: 5319 D 1984 DESIGNATION: 872 5319 D TIDAL MONUMENTATION: Tidal Station disk VM#: 7884 AGENCY: National Ocean Survey (NOS) IDB PID#: AD7875 SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 26° 23.9' N ( 26.39830) LONGITUDE: 81° 50.4' W ( -81.84000) The bench mark is a disk located south of bench mark NO 3 1965, 7.86 m (25.8 ft) NE of the centerline of Coconut Road, 4.82 m (15.8 ft) north of the telephone pole anchor, 3.66 m (12.0 ft) NNW of a telephone pole, 2 m (7 ft) west of a fence, and 0.30 m (1.0 ft) west of a witness post. The bench mark is crimped to the top of a stainless steel rod driven 13.4 m (44 ft) 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: 8725319 PUBLICATION DATE: 11/13/2003 Name: COCONUT POINT, ESTERO BAY FL NOAA Chart: 11426 Latitude: 26° 24.0' N ( 26.40000) USGS Quad: ESTERO Longitude: 81° 50.6' W ( -81.84330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5319 E 1984 DESIGNATION: 872 5319 E TIDAL MONUMENTATION: Tidal Station disk VM#: 7885 AGENCY: National Ocean Survey (NOS) IDB PID#: AD7874 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 26° 23.9' N ( 26.39830) LONGITUDE: 81° 50.2' W ( -81.83670) The bench mark is a disk set in the top of a concrete monument, 0.3 km (0.2 mi) east of bench mark 5319 D 1984, 19.45 m (63.8 ft) north of the centerline of Coconut Road, 5.79 m (19.0 ft) west of the centerline of a dirt road leading north,1.98 m (6.5 ft) NE of a utility pole, 0.34 m (1.1 ft) east of a witness post, and 0.06 m (0.2 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8725319 PUBLICATION DATE: 11/13/2003 Name: COCONUT POINT, ESTERO BAY FL NOAA Chart: 11426 Latitude: 26° 24.0' N ( 26.40000) USGS Quad: ESTERO Longitude: 81° 50.6' W ( -81.84330) T I D A L D A T U M S Tidal datums at COCONUT POINT, 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 = 0.756 MEAN HIGH WATER MHW = 0.675 North American Vertical Datum NAVD88 = 0.534 MEAN SEA LEVEL MSL = 0.419 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 3 1965 1.135 0.460 J 246 1965 1.609 0.934 5319 D 1984 1.067 0.392 5319 E 1984 1.056 0.381
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8725319 PUBLICATION DATE: 11/13/2003 Name: COCONUT POINT, ESTERO BAY FL NOAA Chart: 11426 Latitude: 26° 24.0' N ( 26.40000) USGS Quad: ESTERO Longitude: 81° 50.6' W ( -81.84330) 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.