U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 9414711 PUBLICATION DATE: 02/26/2004 Name: OAKLAND AIRPORT, SAN FRANCISCO BAY CA NOAA Chart: 18649 Latitude: 37° 43.9' N ( 37.73170) USGS Quad: SAN LEANDRO Longitude: 122° 12.5' W (-122.20800) To reach the tidal bench marks from Oakland, proceed along State Route 17 and exit at Hegenberger Road south, then proceed SW along Hegenberger Road for 1.8 km (1.1 mi) to Doolittle Drive, then turn right and proceed NW on Doolittle Drive for 1.1 km (0.7 mi) to the southernmost end of airport channel. The bench marks are along Doolittle Drive and Ehrhart Road. The tide gage and staff were located on the airport channel wharf off Doolittle Drive south of San Leandro Bay. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 2 1936 DESIGNATION: 941 4711 TIDAL 2 MONUMENTATION: Tidal Station disk VM#: 8388 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: HT0277 SETTING CLASSIFICATION: Concrete block OPUS PID: LATITUDE: 37° 43.8' N ( 37.73000) LONGITUDE: 122° 12.6' W (-122.21000) The primary bench mark is a disk set on the top of a concrete block at the NE corner of Hangar 4 (United Airlines), located on the south side of San Leandro Bay at Oakland Airport, 3.47 m (11.4 ft) SW of the SW curb of the drive, 0.94 m (3.1 ft) SW of the north corner of the hangar, and 1 m (2 ft) above the sidewalk.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 9414711 PUBLICATION DATE: 02/26/2004 Name: OAKLAND AIRPORT, SAN FRANCISCO BAY CA NOAA Chart: 18649 Latitude: 37° 43.9' N ( 37.73170) USGS Quad: SAN LEANDRO Longitude: 122° 12.5' W (-122.20800) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 3 1936 DESIGNATION: 941 4711 TIDAL 3 MONUMENTATION: Tidal Station disk VM#: 8389 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: HT0279 SETTING CLASSIFICATION: Concrete block OPUS PID: LATITUDE: 37° 43.8' N ( 37.73000) LONGITUDE: 122° 12.5' W (-122.20800) The bench mark is a disk set on the top of a concrete block at the NE corner of Hangar 3 (U.S. Navy) located on the south side of San Leandro Bay at Oakland Airport, and 0.61 m (2.0 ft) above the street. BENCH MARK STAMPING: 4 RESET 1961 DESIGNATION: 941 4711 TIDAL 4 RESET MONUMENTATION: Tidal Station disk VM#: 8390 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: HT0257 SETTING CLASSIFICATION: Concrete wall OPUS PID: LATITUDE: 37° 43.6' N ( 37.72670) LONGITUDE: 122° 12.1' W (-122.20200) The bench mark is a disk set vertically in NE wall of square concrete telephone terminal building located near the main entrance to Oakland Airport, 160 m (525 ft) NW of the intersection of Hegenberger Road, 98th Avenue, Doolittle Drive and Earhart Road, 33 m (107 ft) SW of the center of Doolittle Drive, 20 m (66 ft) SW of a guyed telephone powerline pole, 9.66 m (31.7 ft) north of the SE corner of Trans-International Airliner building, and 1 m (3 ft) above the pavement.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 9414711 PUBLICATION DATE: 02/26/2004 Name: OAKLAND AIRPORT, SAN FRANCISCO BAY CA NOAA Chart: 18649 Latitude: 37° 43.9' N ( 37.73170) USGS Quad: SAN LEANDRO Longitude: 122° 12.5' W (-122.20800) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 4711 F 1977 DESIGNATION: 941 4711 F TIDAL MONUMENTATION: Tidal Station disk VM#: 8391 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 37° 43.9' N ( 37.73170) LONGITUDE: 122° 12.5' W (-122.20800) The bench mark is a disk located 0.6 km (0.4 mi) NW along Doolittle Drive from the intersection of Doolittle Drive and Hegenberger Road, 24.7 m (81 ft) WSW of railroad right of way, 7.53 m (24.7 ft) WNW of the NW corner of the East Bay Municipal Utility District (Special District No. 1 sewage pumping station 6), and 2.07 m (6.8 ft) ENE of the NE corner post in the fenced yard of the Port of Oakland Airport maintenance yard. The bench mark is crimped to the top of a copper-clad steel rod driven 9.8 m (32 ft) to refusal. BENCH MARK STAMPING: 4711 G 1977 DESIGNATION: 941 4711 G TIDAL MONUMENTATION: Tidal Station disk VM#: 8392 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 37° 43.9' N ( 37.73170) LONGITUDE: 122° 12.5' W (-122.20800) The bench mark is a disk located 0.3 km (0.2 mi) NW along Doolittle Drive from the intersection of Doolittle Drive and Hegenberger Drive, 17.53 m (57.5 ft) east of the SE corner of Space Air Supply Company Building No. 151 at Oakland Airport, and 4.18 m (13.7 ft) SE of the southeasternmost corner of a corner post for a wire fence around building No. 151 at the south edge of an abandoned railroad right of way. The bench mark is crimped to the top of a copper-clad steel rod driven 14.6 m (48 ft) to refusal.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 9414711 PUBLICATION DATE: 02/26/2004 Name: OAKLAND AIRPORT, SAN FRANCISCO BAY CA NOAA Chart: 18649 Latitude: 37° 43.9' N ( 37.73170) USGS Quad: SAN LEANDRO Longitude: 122° 12.5' W (-122.20800) T I D A L D A T U M S Tidal datums at OAKLAND AIRPORT, SAN FRANCISCO BAY based on: LENGTH OF SERIES: 3 MONTHS TIME PERIOD: April 1977 - June 1977 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 9414750 ALAMEDA, SAN FRANCISCO BAY Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 2.060 MEAN HIGH WATER MHW = 1.867 MEAN TIDE LEVEL MTL = 1.104 MEAN SEA LEVEL MSL = 1.087 MEAN LOW WATER MLW = 0.342 North American Vertical Datum NAVD88 = 0.073 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 2 1936 1.710 -0.157 3 1936 2.069 0.202 4 RESET 1961 2.984 1.117 4711 F 1977 1.913 0.046 4711 G 1977 1.748 -0.119
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 9414711 PUBLICATION DATE: 02/26/2004 Name: OAKLAND AIRPORT, SAN FRANCISCO BAY CA NOAA Chart: 18649 Latitude: 37° 43.9' N ( 37.73170) USGS Quad: SAN LEANDRO Longitude: 122° 12.5' W (-122.20800) 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.