U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8725272 PUBLICATION DATE: 11/13/2003 Name: FISH TRAP BAY FL NOAA Chart: 11426 Latitude: 26° 20.2' N ( 26.33670) USGS Quad: BONITA SPRINGS Longitude: 81° 50.7' W ( -81.84500) To reach the tidal bench marks from the intersection of U.S. Highway 41 and Bonita Beach Road (County 864), proceed west and north on Bonita Beach Road (Hickory Boulevard) for 4.3 km (2.7 mi) to its intersection with Forrester Drive, then turn right and proceed east on Forrester Drive for 0.08 km (0.05 mi) to where the road turns to the north, then continue north for 0.3 km (0.2 mi) on road to the house #27312. The bench marks are along Forrester Drive and Bonita Beach Road. The tide gage and staff were located behind house #27312. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 5272 D 1978 DESIGNATION: 872 5272 D TIDAL MONUMENTATION: Tidal Station disk VM#: 7873 AGENCY: National Ocean Survey (NOS) IDB PID#: AD7882 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 26° 20.0' N ( 26.33330) LONGITUDE: 81° 50.7' W ( -81.84500) The primary bench mark is a disk located at the SE corner of the intersection of Forrester Drive and the dirt road leading to the gage site, 77.72 m (255.0 ft) east from the intersection of Hickory Boulevard and Forrester Drive, 18.59 m (61.0 ft) SW of the south entrance to Kings Kew, 4.57 m (15.0 ft) south of the centerline of Forrester Drive, 0.61 m (2.0 ft) north of utility pole No. 442912 and 0.15 m (0.5 ft) north of a witness post. The bench mark is crimped to the top of a copper-coated steel rod driven 5.2 m (17 ft) to refusal, and encased in a PVC pipe and concrete kickblock. NOTE: Mark recovered in poor condition in 1998 by US Power Squadron.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 8725272 PUBLICATION DATE: 11/13/2003 Name: FISH TRAP BAY FL NOAA Chart: 11426 Latitude: 26° 20.2' N ( 26.33670) USGS Quad: BONITA SPRINGS Longitude: 81° 50.7' W ( -81.84500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5272 A 1978 DESIGNATION: 872 5272 A TIDAL MONUMENTATION: Tidal Station disk VM#: 7870 AGENCY: National Ocean Survey (NOS) IDB PID#: AD7885 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 26° 20.1' N ( 26.33500) LONGITUDE: 81° 50.7' W ( -81.84500) The bench mark is a disk set into the top of a concrete monument, 8.53 m (28.0 ft) west of the water's edge of Fish Trap Bay, 2.16 m (7.1 ft) west of a large Norfolk pine tree, 1.37 m (4.5 ft) east of the NE corner of the fence around the yard at house #27312, 0.30 m (1.0 ft) south of the north property boundary, and 0.24 m (0.8 ft) east of a witness post. NOTE: Mark not found in 1998 by US Power Squadron. BENCH MARK STAMPING: 5272 B 1978 DESIGNATION: 872 5272 B TIDAL MONUMENTATION: Tidal Station disk VM#: 7871 AGENCY: National Ocean Survey (NOS) IDB PID#: AD7884 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 26° 20.1' N ( 26.33500) LONGITUDE: 81° 50.7' W ( -81.84500) The bench mark is a disk set into the top of a concrete monument, 11.0 m (36 ft) north of the centerline of the driveway to house #27312, 4.88 m (16.0 ft) east of the centerline of Forrester Drive, 0.61 m (2.0 ft) SW of the end post of a white fence, 0.61 m (2.0 ft) south of the north edge of the property line, and 0.24 m (0.8 ft) west of a witness post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 8725272 PUBLICATION DATE: 11/13/2003 Name: FISH TRAP BAY FL NOAA Chart: 11426 Latitude: 26° 20.2' N ( 26.33670) USGS Quad: BONITA SPRINGS Longitude: 81° 50.7' W ( -81.84500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5272 C 1978 DESIGNATION: 872 5272 C TIDAL MONUMENTATION: Tidal Station disk VM#: 7872 AGENCY: National Ocean Survey (NOS) IDB PID#: AD7883 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 26° 20.1' N ( 26.33500) LONGITUDE: 81° 50.7' W ( -81.84500) The bench mark is a disk set into the top of a concrete monument located north of Forrester Drive along the west side of the dirt road, 7.53 m (24.7 ft) west of the centerline of the Forrester Drive, and 1.07 m (3.5 ft) west of a utility pole with a witness sign attached. NOTE: Mark not found in 1998 by US Power Squadron.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8725272 PUBLICATION DATE: 11/13/2003 Name: FISH TRAP BAY FL NOAA Chart: 11426 Latitude: 26° 20.2' N ( 26.33670) USGS Quad: BONITA SPRINGS Longitude: 81° 50.7' W ( -81.84500) T I D A L D A T U M S Tidal datums at FISH TRAP BAY based on: LENGTH OF SERIES: 2 MONTHS TIME PERIOD: April 1978 - May 1978 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 = 0.302 North American Vertical Datum NAVD88 = 0.247 MEAN HIGH WATER MHW = 0.239 MEAN TIDE LEVEL MTL = 0.144 MEAN SEA LEVEL MSL = 0.143 MEAN LOW WATER MLW = 0.049 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 5272 D 1978 1.424 1.185 5272 A 1978 1.328 1.089 5272 B 1978 0.858 0.619 5272 C 1978 1.282 1.043
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8725272 PUBLICATION DATE: 11/13/2003 Name: FISH TRAP BAY FL NOAA Chart: 11426 Latitude: 26° 20.2' N ( 26.33670) USGS Quad: BONITA SPRINGS Longitude: 81° 50.7' W ( -81.84500) 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.