U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 4 PUBLICATION DATE: 10/09/1987 Station ID: 8722939 SUPERCEDED DATE: 04/21/2003 Name: FORT LAUDERDALE, BAHIA MAR YACHT CLUB, NEW RIVER S FLORIDA NOAA Chart: 11470 Latitude: 26° 6.8' N USGS Quad: PORT EVERGLADES Longitude: 80° 6.5' W To reach the tidal bench marks from the intersection of State Highway Alternate A1A (Las Olas Blvd) and A1A at Fort Lauderdale, proceed south on State Highway A1A for 0.45 mile (0.72 km) to the municipal parking lot across from Bahia Mar Yacht Club. The bench marks are located throughout the marina property. The tide gage and staff were located on a pier at the south side of the North Yacht Basin. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: NO 1 1960 MONUMENTATION: Survey Disk VM#: 5695 AGENCY: PID#: AD2457 SETTING CLASSIFICATION: Concrete Sea Wall The bench mark is set flush in the top of a concrete sea wall at the north end of the fuel dock, 63.5 feet (19.4 m) north of the control tower of the Bahia Mar Yacht Club, 19.5 feet (5.9 m) west of the NW corner of the marine supply store, 17.5 feet (5.3 m) west of the NW corner of the parking lot, 12.5 feet (3.8 m) south of the south end of the westernmost finger pier of the North Yacht Basin, and 2.3 feet (0.7 m) SSW of the northernmost light post along the waterway. BENCH MARK STAMPING: NO 4 1967 MONUMENTATION: Survey Disk VM#: 5696 AGENCY: PID#: AD2458 SETTING CLASSIFICATION: Concrete Sea Wall The bench mark is set flush in the top of a east/west concrete sea wall, 302 feet (92 m) east of the NE corner of the marine supply store, 1 foot (0.3 m) south of the SE corner of dock G, 0.2 foot (0.1 m) north of the north edge of the parking lot, and at highway level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 4 PUBLICATION DATE: 10/09/1987 Station ID: 8722939 SUPERCEDED DATE: 04/21/2003 Name: FORT LAUDERDALE, BAHIA MAR YACHT CLUB, NEW RIVER S FLORIDA NOAA Chart: 11470 Latitude: 26° 6.8' N USGS Quad: PORT EVERGLADES Longitude: 80° 6.5' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: 2939 G 1981 MONUMENTATION: Survey Disk VM#: 5697 AGENCY: PID#: AD5870 SETTING CLASSIFICATION: Stainless Steel Rod in Sleeve The bench mark is 59.0 feet (21.0 m) east of the centerline of the northbound lane of State Highway A1A, 58.2 feet (17.7 m) SW of the SW corner of the parking lot toll booth, and 3.5 feet (1.1 m) SSW of a royal palm tree. The bench mark is the highest point of a stainless steel rod in sleeve surrounded by a pipe with stamped access cover. BENCH MARK STAMPING: 2939 H 1981 MONUMENTATION: Survey Disk VM#: 5698 AGENCY: PID#: AD5871 SETTING CLASSIFICATION: Stainless Steel Rod in Sleeve The bench mark is 112 feet (34 m) NW of Bench Mark 2939 G 1981, 102.7 feet (31.3 m) east of the north bound lane of State Highway A1A, 81 feet (25 m) NW of the NNW corner of the parking lot toll booth, 18.7 feet (5.7 m) north of the centerline of the northernmost driveway of the parking lot, and 4.9 feet (1.5 m) south of the south side of a sidewalk. The bench mark is the highest point of a stainless steel rod in sleeve surrounded by a pipe with access cover and is 0.3 foot (0.1 m) below ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 4 PUBLICATION DATE: 10/09/1987 Station ID: 8722939 SUPERCEDED DATE: 04/21/2003 Name: FORT LAUDERDALE, BAHIA MAR YACHT CLUB, NEW RIVER S FLORIDA NOAA Chart: 11470 Latitude: 26° 6.8' N USGS Quad: PORT EVERGLADES Longitude: 80° 6.5' W T I D A L D A T U M S Tidal datums at FORT LAUDERDALE, BAHIA MAR YACHT CLUB, NEW RIVER S based on: LENGTH OF SERIES: 1 YEAR TIME PERIOD: MAY 1970-APRIL 1971 TIDAL EPOCH: 1960-1978 CONTROL TIDE STATION: 8723170 MIAMI BEACH Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET: HIGHEST OBSERVED WATER LEVEL (10/14/1970) = 3.93 MEAN HIGHER HIGH WATER MHHW = 2.71 MEAN HIGH WATER MHW = 2.59 MEAN TIDE LEVEL MTL = 1.38 * NATIONAL GEODETIC VERTICAL DATUM NGVD29 = 0.84 MEAN LOW WATER MLW = 0.17 MEAN LOWER LOW WATER MLLW = 0.00 LOWEST OBSERVED WATER LEVEL (04/26/1971) = -0.92 * NGVD is based on elevations published in Quad 260802, 3/72 and NOS leveling of 1981. North American Vertical Datum (NAVD88) Bench Mark Elevation Information In FEET above: Stamping or Designation MLLW MHW NO 1 1960 5.88 3.29 NO 4 1967 5.46 2.87 2939 G 1981 14.56 11.91 2939 H 1981 14.04 11.42
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 4 PUBLICATION DATE: 10/09/1987 Station ID: 8722939 SUPERCEDED DATE: 04/21/2003 Name: FORT LAUDERDALE, BAHIA MAR YACHT CLUB, NEW RIVER S FLORIDA NOAA Chart: 11470 Latitude: 26° 6.8' N USGS Quad: PORT EVERGLADES Longitude: 80° 6.5' 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.