U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 4 PUBLICATION DATE: 02/20/1985 Station ID: 9414819 SUPERCEDED DATE: 04/21/2003 Name: SAUSALITO, COE DOCK, RICHARDSON BAY, SAN FRANCISCO CALIFORNIA NOAA Chart: 18649 Latitude: 37° 51.9' N USGS Quad: SAN FRANCISCO NORTH Longitude: 122° 29.6' W To reach the tidal bench marks in Sausalito, proceed east along Bridgeway Street and then along Marinship Way to the U.S. Army Corps of Engineers (COE) San Francisco Bay Model building facilities. The bench marks are along Bridgeway and east of the Corps of Engineers soil lab building and the tide gage and staff were on the east side of the inshore portion of the Corps of Engineers dock. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: SAUSALITO NO 2 1917 MONUMENTATION: Survey Disk VM#: 8431 AGENCY: PID#: HT1070 SETTING CLASSIFICATION: Face of Building The bench mark is set vertically in the NW brick face of the Caledonia Market building at the east corner of the intersection of Pine and Caledonia Streets, 6.0 feet (1.8 m) NE of the west corner of the building, and 1.0 foot (0.3 m) above the sidewalk. BENCH MARK STAMPING: 32 1948 MONUMENTATION: Survey Disk VM#: 8432 AGENCY: PID#: HT1067 SETTING CLASSIFICATION: Concrete Slab The bench mark is set in top of the south corner of a concrete slab, 39.8 feet (12.1 m) SE of the south corner of the laboratory storage building, 36.5 feet (11.1 m) NE of the east corner of a chain link fence at the Corps of Engineers laboratory yard, 14 feet (4 m) NW of the projected centerline of the road, 11.5 feet (3.5 m) NE of the NE rail of a spur track, 0.5 foot (0.2 m) north of the south corner of the slab, and flush with the ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 4 PUBLICATION DATE: 02/20/1985 Station ID: 9414819 SUPERCEDED DATE: 04/21/2003 Name: SAUSALITO, COE DOCK, RICHARDSON BAY, SAN FRANCISCO CALIFORNIA NOAA Chart: 18649 Latitude: 37° 51.9' N USGS Quad: SAN FRANCISCO NORTH Longitude: 122° 29.6' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: 33 1948 MONUMENTATION: Survey Disk VM#: 8433 AGENCY: PID#: HT1066 SETTING CLASSIFICATION: Concrete Slab The bench mark is set in top of a concrete slab at the center of an asphalt road, at the crossing of a spur track, 60.6 feet (18.5 m) south of Bench Mark 32 1948, 44.0 feet (13.4 m) SE of the SE rail of a spur track, 34.7 feet (10.6 m) south of the east fence corner of a chain link fence at the Corps of Engineers laboratory yard, 30.0 feet (9.1 m) NW of the fence line, and flush with the ground. BENCH MARK STAMPING: LS 3221 (4819 C) MONUMENTATION: Survey Disk VM#: 8434 AGENCY: PID#: HT3535 SETTING CLASSIFICATION: Pavement The bench mark is located in the center of the intersection of Napa Street and Bridgeway Avenue, under an iron cover marked MONUMENT, 15 feet (5 m) south of concrete divider, and 1.0 foot (0.3 m) below the pavement. (Designated 4819 C) BENCH MARK STAMPING: LS 3221 (4819 D) MONUMENTATION: Survey Disk VM#: 8435 AGENCY: PID#: HT3536 SETTING CLASSIFICATION: Pavement The bench mark is in the center of the intersection of Litho Street and Bridgeway Avenue, under an iron cover marked MONUMENT, 15 feet (5 m) south of a concrete divider, and 1.0 foot (0.3 m) below the pavement. (Designated 4819 D)
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 4 PUBLICATION DATE: 02/20/1985 Station ID: 9414819 SUPERCEDED DATE: 04/21/2003 Name: SAUSALITO, COE DOCK, RICHARDSON BAY, SAN FRANCISCO CALIFORNIA NOAA Chart: 18649 Latitude: 37° 51.9' N USGS Quad: SAN FRANCISCO NORTH Longitude: 122° 29.6' W T I D A L D A T U M S Tidal datums at SAUSALITO, COE DOCK, RICHARDSON BAY, SAN FRANCISCO based on: LENGTH OF SERIES: 8 MONTHS TIME PERIOD: SEPTEMBER 1978-APRIL 1979 TIDAL EPOCH: 1960-1978 CONTROL TIDE STATION: 9414290 SAN FRANCISCO Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET: HIGHEST OBSERVED WATER LEVEL (12/30/1978) = 7.09 MEAN HIGHER HIGH WATER MHHW = 5.73 MEAN HIGH WATER MHW = 5.14 MEAN TIDE LEVEL MTL = 3.13 MEAN LOW WATER MLW = 1.13 MEAN LOWER LOW WATER MLLW = 0.00 LOWEST OBSERVED WATER LEVEL (01/27/1979) = -1.56 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In FEET above: Stamping or Designation MLLW MHW SAUSALITO NO 2 1917 16.46 11.32 32 1948 11.79 6.65 33 1948 11.69 6.55 LS 3221 (4819 C) 12.15 7.01 LS 3221 (4819 D) 8.84 3.70
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 4 PUBLICATION DATE: 02/20/1985 Station ID: 9414819 SUPERCEDED DATE: 04/21/2003 Name: SAUSALITO, COE DOCK, RICHARDSON BAY, SAN FRANCISCO CALIFORNIA NOAA Chart: 18649 Latitude: 37° 51.9' N USGS Quad: SAN FRANCISCO NORTH Longitude: 122° 29.6' 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.