U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 7 Station ID: 9414849 PUBLICATION DATE: 04/21/2003 Name: RICHMOND INNER HARBOR,S.F.BAY CA NOAA Chart: 18653 Latitude: 37° 54.6' N ( 37.91000) USGS Quad: RICHMOND Longitude: 122° 21.5' W (-122.35800) To reach the bench marks from Richmond, CA, proceed north on I-580 to the Harbour Way South exit, turn right on Cutting Street, follow the Richmond Terminals 2 & 3 signs. Turn right onto Harbour Way South and continue south to the end of the road. Proceed through the first gate and into the inner yard occupied by MAAS boats. The bench marks were in the vicinity and the tide gauge was on the east end of the dock directly south of MAAS boats. T I D A L B E N C H M A R K S
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 7 Station ID: 9414849 PUBLICATION DATE: 04/21/2003 Name: RICHMOND INNER HARBOR,S.F.BAY CA NOAA Chart: 18653 Latitude: 37° 54.6' N ( 37.91000) USGS Quad: RICHMOND Longitude: 122° 21.5' W (-122.35800) T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: BM 1 1932 DESIGNATION: TIDAL 1 STA III 22 MONUMENTATION: Tidal Station disk VM#: 8446 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: HT0923 SETTING CLASSIFICATION: Concrete foundation OPUS PID: LATITUDE: 37° 54.6' N ( 37.91000) LONGITUDE: 122° 21.5' W (-122.35800) The primary bench mark is a disk set flush in the top of the SE concrete footing which was used to support a water tower near the SE corner of the Old Ford plant, 29 m (96 ft) east of the SE corner of the oil house, 18 m (58 ft) north of the end of the grade at the shoreline, 0.64 m (2.1 ft) south of the center of the SE footing, and 1.31 m (4.3 ft) above grade.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 7 Station ID: 9414849 PUBLICATION DATE: 04/21/2003 Name: RICHMOND INNER HARBOR,S.F.BAY CA NOAA Chart: 18653 Latitude: 37° 54.6' N ( 37.91000) USGS Quad: RICHMOND Longitude: 122° 21.5' W (-122.35800) T I D A L B E N C H M A R K S BENCH MARK STAMPING: DESIGNATION: 941 4849 FORD ALIAS: NO STAMPING 1 MONUMENTATION: Pipe Cap VM#: 69 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: HT0924 SETTING CLASSIFICATION: Metal pipe OPUS PID: LATITUDE: 37° 54.6' N ( 37.91000) LONGITUDE: 122° 21.4' W (-122.35700) The bench mark is a 8 cm (0.25 ft) brass pipe cap, set in concrete on the fence line (fence removed except at the shore) on the east property line of the old Ford plant, 160 m (525 ft) east of the water tank footings, 17 m (55 ft) north of the end of the grade at the shoreline, 10.39 m (34.1 ft) north of the iron fence post at the top of the fill where the fence bends down towards the shore, and fastened to the top of an iron pipe set in concrete 0.06 m (0.2 ft) below the surface.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 7 Station ID: 9414849 PUBLICATION DATE: 04/21/2003 Name: RICHMOND INNER HARBOR,S.F.BAY CA NOAA Chart: 18653 Latitude: 37° 54.6' N ( 37.91000) USGS Quad: RICHMOND Longitude: 122° 21.5' W (-122.35800) T I D A L B E N C H M A R K S BENCH MARK STAMPING: BM 2 1932 DESIGNATION: TIDAL 2 STA III 22 MONUMENTATION: Tidal Station disk VM#: 8447 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: HT0920 SETTING CLASSIFICATION: Granite foundation OPUS PID: LATITUDE: 37° 54.6' N ( 37.91000) LONGITUDE: 122° 21.5' W (-122.35800) The bench mark is a disk set vertically in the granite foundation at the northern most entrance on the west side of the old Ford plant, 6.13 m (20.1 ft) north of a 1 m (3 ft) tall red fire main valve next to the west wall of the building, 3.87 m (12.7 ft) south of the northern most entrance on the west side of the building, and 0.15 m (0.5 ft) above ground. BENCH MARK STAMPING: LS 2769 DESIGNATION: 941 4849 LS 2769 MONUMENTATION: Bench Mark disk VM#: 8449 AGENCY: City of Richmond IDB PID#: SETTING CLASSIFICATION: Pavement OPUS PID: LATITUDE: 37° 54.6' N ( 37.91000) LONGITUDE: 122° 21.5' W (-122.35800) The bench mark is a disk set beneath a 0.23 m (0.8 ft) steel monument cover near the centerline of Harbor Way South, just north of the fence at the south end of the street, 27 m (87 ft) west of the west wall of the old Ford plant, 16 m (53 ft) WNW of bench mark 941 4849 GATE, 10.36 m (34.0 ft) east of the west edge of the street, 4 m (13 ft) north of the chain link fence at the south end of Harbor Way South, and 0.3 m (1 ft) below the street.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 7 Station ID: 9414849 PUBLICATION DATE: 04/21/2003 Name: RICHMOND INNER HARBOR,S.F.BAY CA NOAA Chart: 18653 Latitude: 37° 54.6' N ( 37.91000) USGS Quad: RICHMOND Longitude: 122° 21.5' W (-122.35800) T I D A L B E N C H M A R K S BENCH MARK STAMPING: DESIGNATION: 941 4849 GATE ALIAS: NO STAMPING 2 MONUMENTATION: Pipe Cap VM#: 8450 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: HT0921 SETTING CLASSIFICATION: Concrete foundation OPUS PID: LATITUDE: 37° 54.6' N ( 37.91000) LONGITUDE: 122° 21.5' W (-122.35800) The bench mark is a 8 cm (0.25 ft) brass pipe cap, set in the concrete footing of the first fence post east of the gate of the old Ford plant at the south end of Harbour Way South, 16 m (53 ft) east of bench mark LS 2769, 2.44 m (8.0 ft) east of the west edge of the sidewalk, 0.03 m (0.1 ft) north of the chain link fence across the end of Harbour Way South, and 0.06 m (0.2 ft) above grade.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 7 Station ID: 9414849 PUBLICATION DATE: 04/21/2003 Name: RICHMOND INNER HARBOR,S.F.BAY CA NOAA Chart: 18653 Latitude: 37° 54.6' N ( 37.91000) USGS Quad: RICHMOND Longitude: 122° 21.5' W (-122.35800) T I D A L D A T U M S Tidal datums at RICHMOND INNER HARBOR,S.F.BAY based on: LENGTH OF SERIES: 3 Months TIME PERIOD: November 1994 - January 1995 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 9414290 SAN FRANCISCO, SAN FRANCISCO BAY Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 1.841 MEAN HIGH WATER MHW = 1.652 MEAN TIDE LEVEL MTL = 0.997 MEAN SEA LEVEL MSL = 0.990 MEAN LOW WATER MLW = 0.342 North American Vertical Datum NAVD88 = 0.002 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW BM 1 1932 5.068 3.416 941 4849 FORD 4.552 2.900 BM 2 1932 4.902 3.250 LS 2769 4.228 2.576 941 4849 GATE 4.394 2.742
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 7 Station ID: 9414849 PUBLICATION DATE: 04/21/2003 Name: RICHMOND INNER HARBOR,S.F.BAY CA NOAA Chart: 18653 Latitude: 37° 54.6' N ( 37.91000) USGS Quad: RICHMOND Longitude: 122° 21.5' W (-122.35800) 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.