U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 9415056 PUBLICATION DATE: 06/30/2014 Name: PINOLE POINT, SAN PABLO BAY CA NOAA Chart: 18654 Latitude: 38° 0.9' N ( 38.01500) USGS Quad: SAN QUENTIN Longitude: 122° 21.8' W (-122.36300) To reach the tidal bench marks from Berkeley, proceed north on Highway 80 to El Cerrito, then proceed west on Cutting Boulevard to 23rd Street, then turn right and proceed north on 23rd Street/San Pablo Avenue for 8.9 km (5.5 mi) to Richmond Parkway, then turn left and proceed west on Richmond Parkway for 400 m (1300 ft), then turn right and proceed NW on Atlas Road to the Point Pinole Regional Park, and continue to the paved road in the park to where there is a fishing pier and ruins of the Atlas Powder Company pier. The bench marks are located in the park, along the road leading to the pier. The tide gage and staff were located 137 m (450 ft) from the shore on a piling among the ruins of the powder company pier. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 5056 A 1976 DESIGNATION: 941 5056 A TIDAL MONUMENTATION: Tidal Station disk VM#: 8514 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID#: BBCN55 LATITUDE: 38° 0.7' N ( 38.01164) LONGITUDE: 122° 21.9' W (-122.36419) The primary bench mark is a disk located 183 m (600 ft) E of a magazine, 23 m (75 ft) SW of Sandy Beach, 21 m (69 ft) SE of the concrete at the S end of Point Pinole pier, 6 m (21 ft) NE of the top of an embankment overlooking the mark, and 1 m (4 ft) ENE of a witness post. The bench mark is set 0.21 m (0.7 ft) above the grade, crimped to the top of a copper-clad steel rod driven 12.2 m (40 ft) to substantial resistance and encased in a PVC pipe.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 9415056 PUBLICATION DATE: 06/30/2014 Name: PINOLE POINT, SAN PABLO BAY CA NOAA Chart: 18654 Latitude: 38° 0.9' N ( 38.01500) USGS Quad: SAN QUENTIN Longitude: 122° 21.8' W (-122.36300) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5056 B 1976 DESIGNATION: 941 5056 B TIDAL MONUMENTATION: Tidal Station disk VM#: 8515 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 38° 0.7' N ( 38.01108) LONGITUDE: 122° 21.8' W (-122.36406) The bench mark is a disk located 123 m (405 ft) NNE of a square concrete slab, 122 m (400 ft) NE of a magazine, 77 m (253 ft) NE of chemical toilets on a concrete slab, 62 m (205 ft) SSE of bench mark 5056 A 1976, 20 m (66 ft) WSW of the inshore end of the beach, and 1.04 m (3.4 ft) WSW of a witness post. The bench mark is set 0.21 m (0.7 ft) above grade, crimped to the top of a copper-clad steel rod driven 7.3 m (24 ft) to substantial resistance and encased in a PVC pipe. BENCH MARK STAMPING: 5056 D 1976 DESIGNATION: 941 5056 D TIDAL MONUMENTATION: Tidal Station disk VM#: 8517 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 38° 0.5' N ( 38.00853) LONGITUDE: 122° 21.9' W (-122.36514) The bench mark is a disk located 229 m (750 ft) SE of a water tank on a knoll above a magazine, 137 m (450 ft) SSE of bench mark 5056 C 1976, 102 m (336 ft) WNW of yellow brick kilns in a brick wall, 45 m (148 ft) WSW of a paved road, 1.37 m (4.5 ft) SE of a witness post, and 0.24 m (0.8 ft) above the grade. The bench mark is crimped to the top of a copper-clad steel rod driven 7.6 m (25 ft) to substantial resistance and encased in a PVC pipe.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 9415056 PUBLICATION DATE: 06/30/2014 Name: PINOLE POINT, SAN PABLO BAY CA NOAA Chart: 18654 Latitude: 38° 0.9' N ( 38.01500) USGS Quad: SAN QUENTIN Longitude: 122° 21.8' W (-122.36300) T I D A L B E N C H M A R K S BENCH MARK STAMPING: POINT PINOLE 4 1940/1977 DESIGNATION: 941 5056 POINT PINOLE 4 R MONUMENTATION: Bench Mark disk VM#: 20353 AGENCY: National Geodetic Survey (NGS) IDB PID#: JT2895 SETTING CLASSIFICATION: Concrete monument OPUS PID#: JT2895 LATITUDE: 38° 0.7' N ( 38.01156) LONGITUDE: 122° 22.0' W (-122.36675) To reach the benchmark from the S end of the Point Pinole fishing pier, proceed SSW along the access road for 165 m (543 ft) to an intersection, then go WNW for 212 m (695 ft) to the station which is on a bluff W of the road BENCH MARK STAMPING: POINT PINOLE 4 No. 5 1940/1977 MONUMENTATION: Bench Mark disk VM#: 20354 AGENCY: National Geodetic Survey IDB PID#: JT0568 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 38° 0.7' N ( 38.01172) LONGITUDE: 122° 22.0' W (-122.36664) The bench mark is a disk set in the top of a concrete post located on a bluff at the southwest side of Pinole Point, 17.98 m (59 ft) SW of the SW corner of a pit for Magazine 85, 13.78 m (45.2 ft) NE of Point Pinole 4 Triangulation Station, 10.36 m (34 ft) S of the edge of the bluff, 1.37 m (4.5 ft) NE of the NE edge of a firebreak and projects 0.12 m (0.4 ft) above the ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 9415056 PUBLICATION DATE: 06/30/2014 Name: PINOLE POINT, SAN PABLO BAY CA NOAA Chart: 18654 Latitude: 38° 0.9' N ( 38.01500) USGS Quad: SAN QUENTIN Longitude: 122° 21.8' W (-122.36300) T I D A L D A T U M S Tidal datums at PINOLE POINT, SAN PABLO BAY based on: LENGTH OF SERIES: 3 MONTHS TIME PERIOD: December 2010 - February 2011 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 9414863 RICHMOND, CHEVRON OIL PIER Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 1.902 MEAN HIGH WATER MHW = 1.721 MEAN TIDE LEVEL MTL = 1.027 MEAN SEA LEVEL MSL = 1.014 MEAN LOW WATER MLW = 0.332 North American Vertical Datum NAVD88 = 0.019 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 5056 A 1976 2.232 0.511 5056 B 1976 6.394 4.673 5056 D 1976 12.151 10.430 POINT PINOLE 4 1940/1977 20.946 19.225 POINT PINOLE 4 No. 5 1940/1977 19.735 18.014
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 9415056 PUBLICATION DATE: 06/30/2014 Name: PINOLE POINT, SAN PABLO BAY CA NOAA Chart: 18654 Latitude: 38° 0.9' N ( 38.01500) USGS Quad: SAN QUENTIN Longitude: 122° 21.8' W (-122.36300) 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.