U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8724557 PUBLICATION DATE: 06/10/2003 Name: WHITE STREET PIER FL NOAA Chart: 11447 Latitude: 24° 32.7' N ( 24.54500) USGS Quad: KEY WEST Longitude: 81° 47.0' W ( -81.78330) To reach the tidal bench marks from the intersection of Truman Avenue and White Street in Key West, proceed SE on White Street for 1.2 km (0.75 mi) to the pier at the foot of White Street. The bench marks are on the L shaped pier. The tide gage and staff were near the SE end of the pier. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: NO 1 1974 DESIGNATION: 872 4557 TIDAL 1 MONUMENTATION: Tidal Station disk VM#: 9622 AGENCY: National Ocean Survey (NOS) IDB PID#: AA0919 SETTING CLASSIFICATION: Concrete walkway OPUS PID: LATITUDE: 24° 32.7' N ( 24.54500) LONGITUDE: 81° 47.0' W ( -81.78330) The primary bench mark is a disk set flush in a concrete walkway located on the White Street pier at the L junction, 0.3 m (1 ft) north of the east/west sidewalk, 0.30 m (1.0 ft) west of the north/south sidewalk, and 0.30 m (1.0 ft) above the road. BENCH MARK STAMPING: NO 2 1974 DESIGNATION: 872 4557 TIDAL 2 MONUMENTATION: Tidal Station disk VM#: 9623 AGENCY: National Ocean Survey (NOS) IDB PID#: AA0918 SETTING CLASSIFICATION: Concrete walkway OPUS PID: LATITUDE: 24° 32.7' N ( 24.54500) LONGITUDE: 81° 47.0' W ( -81.78330) The bench mark is a disk set flush in a concrete walkway located on the east side of the White Street pier, 79 m (259 ft) north of bench mark NO 1 1974, 2 m (7 ft) east of the second light pole on the east side of the pier, 0.30 m (1.0 ft) east of the north/south sidewalk on the east side of the pier, and 0.30 m (1.0 ft) above the road.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 8724557 PUBLICATION DATE: 06/10/2003 Name: WHITE STREET PIER FL NOAA Chart: 11447 Latitude: 24° 32.7' N ( 24.54500) USGS Quad: KEY WEST Longitude: 81° 47.0' W ( -81.78330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 3 1974 DESIGNATION: 872 4557 TIDAL 3 MONUMENTATION: Tidal Station disk VM#: 9624 AGENCY: National Ocean Survey (NOS) IDB PID#: AA0915 SETTING CLASSIFICATION: Concrete walkway OPUS PID: LATITUDE: 24° 32.7' N ( 24.54500) LONGITUDE: 81° 47.0' W ( -81.78330) The bench mark is a disk set flush in a concrete walkway located on the east side of the White Street pier, 56 m (185 ft) NE of bench mark NO 4 1974, 0.18 m (0.6 ft) south of the north end of the walkway and the pier, and 0.30 m (1.0 ft) above the road. BENCH MARK STAMPING: NO 4 1974 DESIGNATION: 872 4557 TIDAL 4 MONUMENTATION: Tidal Station disk VM#: 9625 AGENCY: National Ocean Survey (NOS) IDB PID#: AA0916 SETTING CLASSIFICATION: Concrete walkway OPUS PID: LATITUDE: 24° 32.7' N ( 24.54500) LONGITUDE: 81° 47.0' W ( -81.78330) The bench mark is a disk set flush in a concrete walkway located on the west side of the White Street pier, 85 m (278 ft) NNW of bench mark NO 5 1974, 0.21 m (0.7 ft) north of the edge of a wingwall located at the end of a seawall projection west from the pier, and 0.30 m (1.0 ft) above the road.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 8724557 PUBLICATION DATE: 06/10/2003 Name: WHITE STREET PIER FL NOAA Chart: 11447 Latitude: 24° 32.7' N ( 24.54500) USGS Quad: KEY WEST Longitude: 81° 47.0' W ( -81.78330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 5 1974 DESIGNATION: 872 4557 TIDAL 5 MONUMENTATION: Tidal Station disk VM#: 9626 AGENCY: National Ocean Survey (NOS) IDB PID#: AA0917 SETTING CLASSIFICATION: Concrete walkway OPUS PID: LATITUDE: 24° 32.7' N ( 24.54500) LONGITUDE: 81° 47.0' W ( -81.78330) The bench mark is a disk set flush in a concrete walkway located on the west side of the White Street pier, 54 m (176 ft) west of bench mark NO 2 1974, 2 m (8 ft) west of the first light pole on the west side of the pier, 0.30 m (1.0 ft) west of the north/south sidewalk, and 0.30 m (1.0 ft) above the road.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8724557 PUBLICATION DATE: 06/10/2003 Name: WHITE STREET PIER FL NOAA Chart: 11447 Latitude: 24° 32.7' N ( 24.54500) USGS Quad: KEY WEST Longitude: 81° 47.0' W ( -81.78330) T I D A L D A T U M S Tidal datums at WHITE STREET PIER based on: LENGTH OF SERIES: 1 MONTH TIME PERIOD: September 1974 - September 1974 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8724580 KEY WEST Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 0.588 North American Vertical Datum NAVD88 = 0.552 MEAN HIGH WATER MHW = 0.496 MEAN SEA LEVEL MSL = 0.288 MEAN TIDE LEVEL MTL = 0.281 MEAN LOW WATER MLW = 0.066 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 1 1974 1.362 0.866 NO 2 1974 1.356 0.860 NO 3 1974 1.362 0.866 NO 4 1974 1.380 0.884 NO 5 1974 1.364 0.868
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8724557 PUBLICATION DATE: 06/10/2003 Name: WHITE STREET PIER FL NOAA Chart: 11447 Latitude: 24° 32.7' N ( 24.54500) USGS Quad: KEY WEST Longitude: 81° 47.0' W ( -81.78330) 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.