U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 4 Station ID: 8722982 PUBLICATION DATE: 02/13/2004 Name: WEST LAKE, SOUTH END FL NOAA Chart: 11466 Latitude: 26° 2.0' N ( 26.03330) USGS Quad: PORT EVERGLADES Longitude: 80° 7.4' W ( -80.12330) To reach the tidal bench marks from the junction of State Highway A1A and County Road 822 (Sheridan Street) in Hollywood Beach, proceed west on County Road 822 for 0.2 km (0.1 mi) to the bridge over the Intracoastal Waterway; continue for another 0.6 km (0.4 mi) to the bridge over West Lake. The bench marks are located on the bridge over West Lake. The tide gage and staff were located at the West Lake bridge. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: NO 3 1973 DESIGNATION: 872 2982 TIDAL 3 MONUMENTATION: Tidal Station disk VM#: 5736 AGENCY: National Ocean Survey (NOS) IDB PID#: AD5895 SETTING CLASSIFICATION: Concrete bulkhead OPUS PID: LATITUDE: 26° 2.0' N ( 26.03330) LONGITUDE: 80° 7.4' W ( -80.12330) The primary bench mark is a disk set flush in the U-shaped concrete bulkhead for the east side of the bridge, 16 m (52 ft) west of the SE end of the bulkhead. BENCH MARK STAMPING: NO 4 1973 DESIGNATION: 872 2982 TIDAL 4 MONUMENTATION: Tidal Station disk VM#: 5737 AGENCY: National Ocean Survey (NOS) IDB PID#: AD5896 SETTING CLASSIFICATION: Concrete bulkhead OPUS PID: LATITUDE: 26° 2.1' N ( 26.03500) LONGITUDE: 80° 7.4' W ( -80.12333) The bench mark is a disk set flush in the U-shaped concrete bulkhead located directly under the east end of the bridge and on the south side of the highway, 18 m (60 ft) south of the north 45 degree corner of the bulkhead, 16 m (52 ft) north of the south 45 degree corner of the bulkhead.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 4 Station ID: 8722982 PUBLICATION DATE: 02/13/2004 Name: WEST LAKE, SOUTH END FL NOAA Chart: 11466 Latitude: 26° 2.0' N ( 26.03330) USGS Quad: PORT EVERGLADES Longitude: 80° 7.4' W ( -80.12330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 5 1973 DESIGNATION: 872 2982 TIDAL 5 MONUMENTATION: Tidal Station disk VM#: 5738 AGENCY: National Ocean Survey (NOS) IDB PID#: AD5897 SETTING CLASSIFICATION: Concrete bulkhead OPUS PID: LATITUDE: 26° 2.0' N ( 26.03333) LONGITUDE: 80° 7.4' W ( -80.12333) The bench mark is a disk set flush in the U-shaped concrete bulkhead for the east side of the bridge, 24 m (78 ft) west of the NE end of the bulkhead. BENCH MARK STAMPING: 1 16.925 DESIGNATION: 1 16.925 FLHD MONUMENTATION: Bench Mark disk VM#: 5739 AGENCY: Florida Highway Division (FLHD) IDB PID#: AD5899 SETTING CLASSIFICATION: Concrete bridge curbing OPUS PID: LATITUDE: 26° 2.0' N ( 26.03330) LONGITUDE: 80° 7.4' W ( -80.12330) The bench mark is a disk set in the concrete curbing located at the SW end of the bridge, 8 m (27 ft) south of the centerline of the bridge, and 0.15 m (0.5 ft) east of the west end of the bridge. BENCH MARK STAMPING: 2 16.925 DESIGNATION: 2 16.925 FLHD MONUMENTATION: Bench Mark disk VM#: 5740 AGENCY: Florida Highway Division (FLHD) IDB PID#: AD5898 SETTING CLASSIFICATION: Concrete bridge curbing OPUS PID: LATITUDE: 26° 2.0' N ( 26.03330) LONGITUDE: 80° 7.4' W ( -80.12330) The bench mark is a disk set in the concrete curbing located at the NE corner of the bridge, 8 m (27 ft) north of the centerline of the bridge, and 0.15 m (0.5 ft) west of the east end of the bridge.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 4 Station ID: 8722982 PUBLICATION DATE: 02/13/2004 Name: WEST LAKE, SOUTH END FL NOAA Chart: 11466 Latitude: 26° 2.0' N ( 26.03330) USGS Quad: PORT EVERGLADES Longitude: 80° 7.4' W ( -80.12330) T I D A L D A T U M S Tidal datums at WEST LAKE, SOUTH END based on: LENGTH OF SERIES: 1 MONTH TIME PERIOD: August 1973 - August 1973 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8723170 MIAMI BEACH (CITY PIER) Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 0.672 MEAN HIGH WATER MHW = 0.648 North American Vertical Datum NAVD88 = 0.630 MEAN SEA LEVEL MSL = 0.349 MEAN TIDE LEVEL MTL = 0.347 MEAN LOW WATER MLW = 0.046 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 1973 1.261 0.613 NO 4 1973 1.313 0.665 NO 5 1973 1.316 0.668 1 16.925 5.253 4.605 2 16.925 5.246 4.598
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 4 Station ID: 8722982 PUBLICATION DATE: 02/13/2004 Name: WEST LAKE, SOUTH END FL NOAA Chart: 11466 Latitude: 26° 2.0' N ( 26.03330) USGS Quad: PORT EVERGLADES Longitude: 80° 7.4' W ( -80.12330) 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.