U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 6 Station ID: 9415266 PUBLICATION DATE: 07/14/2003 Name: PIERCE HARBOR,GOODYEAR SLOUGH CA NOAA Chart: 18656 Latitude: 38° 7.6' N ( 38.12670) USGS Quad: FAIRFIELD SOUTH Longitude: 122° 6.0' W (-122.10000) To reach the tidal bench marks from Benicia, proceed north along Interstate 680, then exit at Parish Road heading towards Pierce, then turn and proceed north along Goodyear Road for 1.3 km (0.8 mi) to Pierce Lane, then turn right and proceed east on Pierce Lane for 0.5 km (0.3 mi) to the Southern Pacific Railroad tracks. The bench marks are along Pierce Lane and the railroad tracks. The tide gage and staff were located on Pierce Harbor on the southernmost dock. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 5266 E 1977 DESIGNATION: 941 5266 E MONUMENTATION: Tidal Station disk VM#: 6707 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Unspecified deep rod OPUS PID: LATITUDE: 38° 7.6' N ( 38.12670) LONGITUDE: 122° 6.0' W (-122.10000) The primary bench mark is a disk located on the east side of the Southern Pacific railroad tracks, 219 m (720 ft) south of the centerline of the paved access road to Pierce Harbor, 152 m (500 ft) north of bench mark 2 1932, 17 m (55 ft) east of the easternmost rail of railroad tracks, and 8 m (25 ft) east of a fence. The bench mark is crimped to the top of a rod driven 12.5 m (41 ft) to substantial resistance.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 6 Station ID: 9415266 PUBLICATION DATE: 07/14/2003 Name: PIERCE HARBOR,GOODYEAR SLOUGH CA NOAA Chart: 18656 Latitude: 38° 7.6' N ( 38.12670) USGS Quad: FAIRFIELD SOUTH Longitude: 122° 6.0' W (-122.10000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: BM 2 1932 DESIGNATION: TIDAL 2 MONUMENTATION: Tidal Station disk VM#: 6704 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: JT0161 SETTING CLASSIFICATION: Concrete footing OPUS PID: LATITUDE: 38° 7.3' N ( 38.12170) LONGITUDE: 122° 6.1' W (-122.10200) The bench mark is a disk set in the northern part of the concrete footing of signal tower No. 398, four telephone line poles south of mile post 40, just east of the railroad tracks, 0.5 km (0.3 mi) SW of the road across the railroad tracks at the Pierce Station, 9 m (31 ft) SE of a telephone line pole, 6 m (21 ft) north of the center of the motor car platform, 2.90 m (9.5 ft) east of the east rail of the railroad tracks, and 0.15 m (0.5 ft) below the top of the rail. BENCH MARK STAMPING: 5266 C 1977 DESIGNATION: 941 5266 C MONUMENTATION: Tidal Station disk VM#: 6705 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete foundation OPUS PID: LATITUDE: 38° 7.6' N ( 38.12670) LONGITUDE: 122° 6.0' W (-122.10000) The bench mark is a disk set in a concrete foundation for a telephone booth and supports a 9.14 m (30.0 ft) high antenna near the intersection of the railroad tracks and Pierce Lane, 32 m (104 ft) SW of bench mark 5266 D 1977, 0.76 m (2.5 ft) north of the Pierce Harbor Cafe, and flush with the foundation.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 6 Station ID: 9415266 PUBLICATION DATE: 07/14/2003 Name: PIERCE HARBOR,GOODYEAR SLOUGH CA NOAA Chart: 18656 Latitude: 38° 7.6' N ( 38.12670) USGS Quad: FAIRFIELD SOUTH Longitude: 122° 6.0' W (-122.10000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5266 D 1977 DESIGNATION: 941 5266 D MONUMENTATION: Tidal Station disk VM#: 6706 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Launching ramp OPUS PID: LATITUDE: 38° 7.6' N ( 38.12670) LONGITUDE: 122° 6.0' W (-122.10000) The bench mark is a disk set in the north side of the launching ramp at Pierce Harbor, 5 m (15 ft) east of the NW corner of the boat ramp, 0.3 m (1 ft) south of the edge of the boat ramp, and flush with the north side of the boat ramp. BENCH MARK STAMPING: 5266 F 1977 DESIGNATION: 941 5266 F MONUMENTATION: Tidal Station disk VM#: 6708 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Unspecified deep rod OPUS PID: LATITUDE: 38° 7.6' N ( 38.12670) LONGITUDE: 122° 6.0' W (-122.10000) The bench mark is a disk located on the NW corner of Pierce Lane and a dirt road leading to the West Family Duck Club, west of the railroad tracks, 81 m (266 ft) east of bench mark 5166 G 1977, 21 m (68 ft) west of the westernmost of four rails, and 4 m (12 ft) north of the centerline of the paved road. The bench mark is crimped to the top of a rod driven 13.4 m (44 ft) to substantial resistance, and encased in a PVC pipe.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 6 Station ID: 9415266 PUBLICATION DATE: 07/14/2003 Name: PIERCE HARBOR,GOODYEAR SLOUGH CA NOAA Chart: 18656 Latitude: 38° 7.6' N ( 38.12670) USGS Quad: FAIRFIELD SOUTH Longitude: 122° 6.0' W (-122.10000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5266 G 1977 DESIGNATION: 941 5266 G MONUMENTATION: Tidal Station disk VM#: 6709 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Unspecified deep rod OPUS PID: LATITUDE: 38° 7.6' N ( 38.12670) LONGITUDE: 122° 6.0' W (-122.10000) The bench mark is a disk set on the north side of Pierce Lane, 0.32 km (0.2 mi) east of Goodyear Road, 99 m (324 ft) west of the westmost of four rails, and 4 m (12 ft) north of the centerline. The bench mark is crimped to the top of a rod and driven 10.7 m (35 ft) to substantial resistance.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 6 Station ID: 9415266 PUBLICATION DATE: 07/14/2003 Name: PIERCE HARBOR,GOODYEAR SLOUGH CA NOAA Chart: 18656 Latitude: 38° 7.6' N ( 38.12670) USGS Quad: FAIRFIELD SOUTH Longitude: 122° 6.0' W (-122.10000) T I D A L D A T U M S Tidal datums at PIERCE HARBOR,GOODYEAR SLOUGH based on: LENGTH OF SERIES: 1 YEAR TIME PERIOD: June 1977 - May 1978 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 9415144 PORT CHICAGO, SUISUN BAY Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (02/05/1978) = 1.889 MEAN HIGHER HIGH WATER MHHW = 1.498 MEAN HIGH WATER MHW = 1.351 MEAN SEA LEVEL MSL = 0.785 MEAN TIDE LEVEL MTL = 0.784 MEAN LOW WATER MLW = 0.217 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (05/27/1978) = -0.349 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 5266 E 1977 1.761 0.410 BM 2 1932 2.389 1.038 5266 C 1977 1.490 0.139 5266 D 1977 1.859 0.508 5266 F 1977 1.192 -0.159 5266 G 1977 1.321 -0.030
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 6 Station ID: 9415266 PUBLICATION DATE: 07/14/2003 Name: PIERCE HARBOR,GOODYEAR SLOUGH CA NOAA Chart: 18656 Latitude: 38° 7.6' N ( 38.12670) USGS Quad: FAIRFIELD SOUTH Longitude: 122° 6.0' W (-122.10000) 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.