U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 4 PUBLICATION DATE: 12/16/1991 Station ID: 8722706 SUPERCEDED DATE: 04/21/2003 Name: BOYNTON BEACH, LAKE WORTH FLORIDA NOAA Chart: 11466 Latitude: 26° 32.9' N USGS Quad: LAKE WORTH Longitude: 80° 3.2' W To reach the tidal bench marks from the junction of State Highway 804 (NE 2nd Avenue) with U.S. Highway 1 in Boynton Beach, proceed north on U.S. Highway 1 for 1.4 miles (2.3 km) to the entrance to Shooters Restaurant located at 2280 North Federal Highway, continue east on the paved drive for 0.1 mile (0.2 km) to the restaurant. The bench marks are on the bulkhead, north of the restaurant, and across U.S. Highway 1 at the entrance. The tide gauge and staff were on the north side of the restaurant boat basin. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: U 233 1965 MONUMENTATION: Survey Disk VM#: 7453 AGENCY: PID#: AD2743 SETTING CLASSIFICATION: Concrete Monument The primary bench mark is set in the top of a concrete monument across U.S. Highway 1 from the entrance to Shooters Restaurant, 0.2 mile (0.3 km) north of mile post 311, 186.0 feet (56.7 m) south of a road crossing, 22.9 feet (7.0 m) west of the west rail of the railroad tracks, 3.0 feet (0.9 m) south of the first power pole south of the crossing, 1.5 feet (0.5 m) north of a witness post, and level with the rail. BENCH MARK STAMPING: 2706 F 1986 MONUMENTATION: Survey Disk VM#: 7454 AGENCY: PID#: AD8076 SETTING CLASSIFICATION: Concrete Sea Wall The bench mark is set in the top of the north end of a concrete sea wall just to the north of the boat basin at Shooters Restaurant, at the east end of Las Palmas Avenue, and 115 feet (35 m) north of the extended centerline of Las Palmas Avenue and a wooden dock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 4 PUBLICATION DATE: 12/16/1991 Station ID: 8722706 SUPERCEDED DATE: 04/21/2003 Name: BOYNTON BEACH, LAKE WORTH FLORIDA NOAA Chart: 11466 Latitude: 26° 32.9' N USGS Quad: LAKE WORTH Longitude: 80° 3.2' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: 2706 G 1986 MONUMENTATION: Survey Disk VM#: 7455 AGENCY: PID#: AD8077 SETTING CLASSIFICATION: Concrete Sea Wall The bench mark is set in the top of and near the center of a concrete sea wall just to the north of the boat basin at Shooters Restaurant, 110 feet (34 m) south of the north end of the sea wall, 100 feet (30 m) east of the end of Las Palmas Avenue, and 4 feet (1 m) north of the centerline of a wooden dock. BENCH MARK STAMPING: 2706 H 1986 MONUMENTATION: Survey Disk VM#: 7456 AGENCY: PID#: AD8078 SETTING CLASSIFICATION: Concrete Sea Wall The bench mark is set in the top of the south end of a concrete sea wall just to the north of the boat basin at Shooters Restaurant, 110 feet (34 m) south of the centerline of a wooden dock. BENCH MARK STAMPING: 2706 J 1986 MONUMENTATION: Survey Disk VM#: 7457 AGENCY: PID#: AD8075 SETTING CLASSIFICATION: Concrete Storm Drain The bench mark is set in the top of a concrete drain 275 feet (84 m) south of the centerline of Las Palmas Avenue, 72.5 feet (22.1 m) south of the centerline of the south entrance drive to Shooters Restaurant and 12 feet (4 m) north of powerline pole #6-8111-7019-0-5.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 4 PUBLICATION DATE: 12/16/1991 Station ID: 8722706 SUPERCEDED DATE: 04/21/2003 Name: BOYNTON BEACH, LAKE WORTH FLORIDA NOAA Chart: 11466 Latitude: 26° 32.9' N USGS Quad: LAKE WORTH Longitude: 80° 3.2' W T I D A L D A T U M S Tidal datums at BOYNTON BEACH, LAKE WORTH based on: LENGTH OF SERIES: 40 MONTHS TIME PERIOD: MAY 1970 - OCTOBER 1973 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 (10/25/1973) = 4.86 MEAN HIGHER HIGH WATER MHHW = 2.86 MEAN HIGH WATER MHW = 2.69 MEAN TIDE LEVEL MTL = 1.43 * NATIONAL GEODETIC VERTICAL DATUM NGVD29 = 0.95 MEAN LOW WATER MLW = 0.16 MEAN LOWER LOW WATER MLLW = 0.00 LOWEST OBSERVED WATER LEVEL (04/24/1970) = -0.81 * NGVD is based on elevations published in Quad 260801, 2/72 and NOS leveling of 1981. North American Vertical Datum (NAVD88) Bench Mark Elevation Information In FEET above: Stamping or Designation MLLW MHW U 233 1965 12.35 9.66 2706 F 1986 6.21 3.52 2706 G 1986 6.21 3.52 2706 H 1986 6.18 3.49 2706 J 1986 11.04 8.35
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 4 PUBLICATION DATE: 12/16/1991 Station ID: 8722706 SUPERCEDED DATE: 04/21/2003 Name: BOYNTON BEACH, LAKE WORTH FLORIDA NOAA Chart: 11466 Latitude: 26° 32.9' N USGS Quad: LAKE WORTH Longitude: 80° 3.2' 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.