U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 4 PUBLICATION DATE: 05/01/1987 Station ID: 8722334 SUPERCEDED DATE: 04/21/2003 Name: NORTH FORK, ST. LUCIE RIVER FLORIDA NOAA Chart: 11474 Latitude: 27° 14.6' N USGS Quad: PALM CITY Longitude: 80° 18.8' W To reach the tidal bench marks from the NW end of the U.S. Highway 1 bridge over the St. Lucie River in Stuart, proceed 4.3 miles (6.9 km) north on U.S. Highway 1 to Westmoreland Boulevard (entrance for the Sandpiper Bay Resort), proceed 1.3 miles (2.1 km) west on Westmoreland Boulevard to Pine Valley Road, then proceed 1.4 miles (2.3 km) south on Pine Valley Road to the St. Lucie Hilton Country Club Marina. The bench marks are on the Hilton Marina property, along the concrete walk and seawall. The tide gage and staff were on the Hilton Marina pier. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: NO 2 1972 MONUMENTATION: Survey Disk VM#: 5437 AGENCY: PID#: AF6948 SETTING CLASSIFICATION: Concrete Seawall The bench mark is set flush in the top of the concrete seawall, 60 feet (18 m) SW of the SW corner of the dock master's office, 2.6 feet (0.8 m) NE of the SW corner of the seawall and boat ramp, 2.0 feet (0.6 m) SW of a 4-inch pipe base supporting a Standard Oil sign, and 1.8 feet (0.5 m) east of the east wall of the boat ramp. BENCH MARK STAMPING: NO 3 1972 MONUMENTATION: Survey Disk VM#: 5438 AGENCY: PID#: AF6949 SETTING CLASSIFICATION: Concrete Seawall The bench mark is set flush in the top of the concrete seawall, 162 feet (49 m) west of the SW corner of the dock master's office, and 0.8 foot (0.2 m) NE of the SW corner of the seawall and boat ramp.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 4 PUBLICATION DATE: 05/01/1987 Station ID: 8722334 SUPERCEDED DATE: 04/21/2003 Name: NORTH FORK, ST. LUCIE RIVER FLORIDA NOAA Chart: 11474 Latitude: 27° 14.6' N USGS Quad: PALM CITY Longitude: 80° 18.8' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 4 1972 MONUMENTATION: Survey Disk VM#: 5439 AGENCY: PID#: AF6946 SETTING CLASSIFICATION: Concrete Dock The bench mark is set flush in the concrete dock of the St. Lucie Hilton Country Club, just south of the tennis courts, 231.5 feet (70.6 m) west of the NE corner of the dock, 109.5 feet (33.4 m) east of the NW corner of the dock, 9.5 feet (2.9 m) north of the south edge of the dock, and 0.5 foot (0.2 m) south of the north edge of the dock. BENCH MARK STAMPING: NO 5 1972 MONUMENTATION: Survey Disk VM#: 5440 AGENCY: PID#: AF6945 SETTING CLASSIFICATION: Concrete Dock The bench mark is set flush in the concrete dock of the St. Lucie Hilton Country Club Marina, just south of the tennis courts, 180.3 feet (60.0 m) east of Bench Mark N0 4 1972, 51.2 feet (15.6 m) east of the NE corner of the dock, 9.5 feet (2.9 m) north of the south edge of the dock, and 0.4 foot (0.1 m) south of the north edge of the dock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 4 PUBLICATION DATE: 05/01/1987 Station ID: 8722334 SUPERCEDED DATE: 04/21/2003 Name: NORTH FORK, ST. LUCIE RIVER FLORIDA NOAA Chart: 11474 Latitude: 27° 14.6' N USGS Quad: PALM CITY Longitude: 80° 18.8' W T I D A L D A T U M S Tidal datums at NORTH FORK, ST. LUCIE RIVER based on: LENGTH OF SERIES: 5 MONTHS TIME PERIOD: AUGUST-DECEMBER 1972 TIDAL EPOCH: 1960-1978 CONTROL TIDE STATION: 8722371 SEWALL POINT Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET: HIGHEST OBSERVED WATER LEVEL (10/22/1972) = 2.64 MEAN HIGHER HIGH WATER MHHW = 1.23 MEAN HIGH WATER MHW = 1.12 MEAN TIDE LEVEL MTL = 0.63 MEAN LOW WATER MLW = 0.13 MEAN LOWER LOW WATER MLLW = 0.00 LOWEST OBSERVED WATER LEVEL (08/02/1972) = -0.44 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In FEET above: Stamping or Designation MLLW MHW NO 2 1972 5.03 3.91 NO 3 1972 5.01 3.89 NO 4 1972 4.34 3.22 NO 5 1972 4.31 3.19
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 4 PUBLICATION DATE: 05/01/1987 Station ID: 8722334 SUPERCEDED DATE: 04/21/2003 Name: NORTH FORK, ST. LUCIE RIVER FLORIDA NOAA Chart: 11474 Latitude: 27° 14.6' N USGS Quad: PALM CITY Longitude: 80° 18.8' 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.