U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 10 Station ID: 9410650 PUBLICATION DATE: 05/15/2003 Name: CABRILLO BEACH CA NOAA Chart: 18751 Latitude: 33° 42.4' N ( 33.70670) USGS Quad: LONG BEACH Longitude: 118° 16.4' W (-118.27300) To reach the tidal bench marks from Interstate Highway 110 southbound (Harbor Freeway), take the Gaffey Street exit, proceed on Gaffey Street and turn left onto 9th Street, then proceed on 9th Street to turn right onto Pacific Street and proceed, turning left at the sign for Cabrillo Beach State Park. The bench marks are in the vicinity of the park and along the breakwater. The tide gage was located in the pump room behind the restrooms at the fishing pier concession stand near the breakwater. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: NO 12 1973 DESIGNATION: 941 0650 TIDAL 12 MONUMENTATION: Tidal Station disk VM#: 8011 AGENCY: National Ocean Survey (NOS) IDB PID#: DY2506 SETTING CLASSIFICATION: Concrete base OPUS PID: LATITUDE: 33° 42.5' N ( 33.70830) LONGITUDE: 118° 16.7' W (-118.27800) The primary bench mark is a disk set flush in the base of the fourth concrete street light in a series running from the fishing pier along the road leading approximately SE-NW towards the Juan Rodriguez Cabrillo statue, 560 m (1837 ft) SE of the Juan Rodriguez Cabrillo statue, 40 m (130 ft) SE of a pole-gate with chain and lock, 13 m (44 ft) SW of the NW edge of the old granite breakwater, 4.57 m (15.0 ft) SW of the centerline of the paved road, and 0.94 m (3.1 ft) SW of the SW side of the asphalt curb of the road leading to the pier. NOTE: The section of the light pole base at the described location of the mark is missing and the mark is assumed to be destroyed.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 10 Station ID: 9410650 PUBLICATION DATE: 05/15/2003 Name: CABRILLO BEACH CA NOAA Chart: 18751 Latitude: 33° 42.4' N ( 33.70670) USGS Quad: LONG BEACH Longitude: 118° 16.4' W (-118.27300) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 3 1950 DESIGNATION: TIDAL 3 STA II 16 MONUMENTATION: Tidal Station disk VM#: 8005 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: DY1101 SETTING CLASSIFICATION: Granite boulder OPUS PID: LATITUDE: 33° 42.4' N ( 33.70670) LONGITUDE: 118° 16.5' W (-118.27500) The bench mark is a disk set in top of a gray granite boulder in the centerline of the breakwater rocks, 174 m (570 ft) SE of bench mark NO 11 1973, 73 m (240 ft) NW of the 0.91 m (3 ft) high ruins of a concrete structure in the center of the breakwater, 64 m (210 ft) SE of the tangent to the SE side of the building on the pier, 2 m (7 ft) south of the remains of a piece of concrete pedestal once used to hold a pipeline, and 0.76 m (2.5 ft) SW of the centerline of the breakwater. NOTE: The stamping has eroded away and is no longer legible. BENCH MARK STAMPING: NO 4 1950 DESIGNATION: 941 0650 TIDAL 4 MONUMENTATION: Tidal Station disk VM#: 8006 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: DY1100 SETTING CLASSIFICATION: Concrete walk OPUS PID: LATITUDE: 33° 42.6' N ( 33.71000) LONGITUDE: 118° 17.0' W (-118.28300) The bench mark is a disk set in the concrete sidewalk near the SW corner of the museum and cafe (abandoned) at Cabrillo Beach, 46.21 m (151.6 ft) south of the center of the south lane of the traffic circle around the Cabrillo statue, 0.30 m (1 ft) east of the SW corner of the building, and 0.21 m (0.7 ft) south of the south side of the building.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 10 Station ID: 9410650 PUBLICATION DATE: 05/15/2003 Name: CABRILLO BEACH CA NOAA Chart: 18751 Latitude: 33° 42.4' N ( 33.70670) USGS Quad: LONG BEACH Longitude: 118° 16.4' W (-118.27300) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 5 1950 DESIGNATION: 941 0650 TIDAL 5 MONUMENTATION: Tidal Station disk VM#: 8007 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: DY1099 SETTING CLASSIFICATION: Concrete foundation OPUS PID: LATITUDE: 33° 42.6' N ( 33.71000) LONGITUDE: 118° 17.1' W (-118.28500) The bench mark is a disk set in top and near the center of the SE edge of the concrete base for the statue of Juan Rodriguez Cabrillo which is located near the center of a traffic circle, 18.81 m (61.7 ft) north of the center of the south lane of the circle, 16.18 m (53.1 ft) NE of the north end of a sign (Cabrillo Beach), 0.91 m (3 ft) west of the SW corner of the statue base, and 0.79 m (2.6 ft) above the level of the traffic circle. BENCH MARK STAMPING: NO 9 1973 DESIGNATION: 941 0650 TIDAL 9 MONUMENTATION: Tidal Station disk VM#: 8008 AGENCY: National Ocean Survey (NOS) IDB PID#: DY2509 SETTING CLASSIFICATION: Concrete pier OPUS PID: LATITUDE: 33° 42.4' N ( 33.70670) LONGITUDE: 118° 16.5' W (-118.27500) The bench mark is a disk set flush in the concrete pier deck on the SE side of the concession building, 5 m (17 ft) NE of a wire gage fence, 3.51 m (11.5 ft) south of the NE corner of the building, 1.49 m (4.9 ft) SE of the SE wall of the building, 0.21 m (0.7 ft) NW of the NW edge of the pier, and 0.18 m (0.6 ft) NW of the SE railing surrounding three sides of the walkway around the concession building.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 10 Station ID: 9410650 PUBLICATION DATE: 05/15/2003 Name: CABRILLO BEACH CA NOAA Chart: 18751 Latitude: 33° 42.4' N ( 33.70670) USGS Quad: LONG BEACH Longitude: 118° 16.4' W (-118.27300) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 10 1973 DESIGNATION: 941 0650 TIDAL 10 MONUMENTATION: Tidal Station disk VM#: 8009 AGENCY: National Ocean Survey (NOS) IDB PID#: DY2508 SETTING CLASSIFICATION: Concrete pier OPUS PID: LATITUDE: 33° 42.5' N ( 33.70830) LONGITUDE: 118° 16.6' W (-118.27700) The bench mark is a disk set in a concrete pier deck, about midway between the NW end of the fishing pier and the concession building on the pier at Cabrillo beach, 0.85 km (0.53 mi) SE of the Juan Rodriguez Cabrillo statue, 2.50 m (8.2 ft) SW of the centerline of the pier, 0.70 m (2.3 ft) NW of the fifth light pole SE of the access pier to the main pier and 0.61 m (2.0 ft) NE of the SW edge of the concrete pier deck. The bench mark is set 0.09 m (0.3 ft) below the level of the pier deck and is encased in a 5-inch logo cap.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 10 Station ID: 9410650 PUBLICATION DATE: 05/15/2003 Name: CABRILLO BEACH CA NOAA Chart: 18751 Latitude: 33° 42.4' N ( 33.70670) USGS Quad: LONG BEACH Longitude: 118° 16.4' W (-118.27300) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 11 1973 DESIGNATION: 941 0650 TIDAL 11 MONUMENTATION: Tidal Station disk VM#: 8010 AGENCY: National Ocean Survey (NOS) IDB PID#: DY2507 SETTING CLASSIFICATION: Concrete abutment OPUS PID: LATITUDE: 33° 42.5' N ( 33.70830) LONGITUDE: 118° 16.6' W (-118.27700) The bench mark is a disk set the concrete abutment and deck of the fishing pier, 0.74 km (0.46 mi) SE of the Juan Rodriguez Cabrillo statue, 32 m (106 ft) NE of the southeasternmost concrete street lamp (the last of a series running from NW to SE from inshore to the pier), 10 m (33 ft) NE of the centerline of the asphalt road leading to the pier, 4.72 m (15.5 ft) NE of the NE corner of a 1.37 m (4.5 ft) high concrete construction monument at the beginning of the pier, 3.66 m (12.0 ft) SE of the centerline of the SW to NE running portion of the pier and 0.79 m (2.6 ft) north of the SW end of a guardrail. The benchmark is is set 0.09 m (0.3 ft) below grade and is covered by a 5-inch logo cap. NOTE: The disk has been mutilated and the "No." and part of the first "1" are illegible.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 10 Station ID: 9410650 PUBLICATION DATE: 05/15/2003 Name: CABRILLO BEACH CA NOAA Chart: 18751 Latitude: 33° 42.4' N ( 33.70670) USGS Quad: LONG BEACH Longitude: 118° 16.4' W (-118.27300) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 13 1973 DESIGNATION: 941 0650 TIDAL 13 MONUMENTATION: Tidal Station disk VM#: 8012 AGENCY: National Ocean Survey (NOS) IDB PID#: DY2505 SETTING CLASSIFICATION: Concrete base OPUS PID: LATITUDE: 33° 42.6' N ( 33.71000) LONGITUDE: 118° 16.8' W (-118.28000) The bench mark is a disk set in the NE corner of the concrete base for the first light pole NW of the fishing pier parking area, 0.3 km (0.2 mi) SE of the Juan Rodriguez Cabrillo statue, 8.29 m (27.2 ft) NW of the center of the NW entrance road to the parking area, 4.51 m (14.8 ft) SW of the centerline of the road leading to the pier, 1.07 m (3.5 ft) NNE of the NE end of a woven wire fence at the NW end of the pier parking lot, and 1.01 m (3.3 ft) SW of the SW curb of the asphalt road leading to the pier, and is 0.21 m (0.7 ft) below grade.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 10 Station ID: 9410650 PUBLICATION DATE: 05/15/2003 Name: CABRILLO BEACH CA NOAA Chart: 18751 Latitude: 33° 42.4' N ( 33.70670) USGS Quad: LONG BEACH Longitude: 118° 16.4' W (-118.27300) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 0650 S 1980 DESIGNATION: 941 0650 S TIDAL MONUMENTATION: Tidal Station disk VM#: 8013 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 33° 42.4' N ( 33.70670) LONGITUDE: 118° 16.4' W (-118.27300) The bench mark is a disk located in the southernmost of two eucalyptus tree planters at the Cabrillo Beach boat trailer parking lot, 104 m (340 ft) NE of the NE corner of the northernmost of two Cabrillo Beach Marine Museum buildings located in the parking lot, 52 m (171 ft) SW of the SW corner of the public restrooms nearest the boat landing ramp, 16 m (51 ft) north of a concrete base metal light post, 5.70 m (18.7 ft) north of the SW corner of the planter curb, 0.76 m (2.5 ft) NNW of a 4-inch square wooden witness post, and 0.61 m (2.0 ft) east of the planter curb. The bench mark is crimped to a copper-clad steel rod and driven to a depth of 5.6 m (18 ft).
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 8 of 10 Station ID: 9410650 PUBLICATION DATE: 05/15/2003 Name: CABRILLO BEACH CA NOAA Chart: 18751 Latitude: 33° 42.4' N ( 33.70670) USGS Quad: LONG BEACH Longitude: 118° 16.4' W (-118.27300) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 0650 T 1980 DESIGNATION: 941 0650 T TIDAL MONUMENTATION: Tidal Station disk VM#: 8014 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 33° 42.4' N ( 33.70670) LONGITUDE: 118° 16.4' W (-118.27300) The bench mark is a disk located at the SE corner of the Cabrillo Beach Heavy Equipment Yard and Maintenance Building, 160 m (525 ft) NW of the Juan Rodriguez Cabrillo statue, 42 m (138 ft) south of the SE corner of the loading platform on the south side of the northernmost of two Cabrillo Beach Marine Museum buildings, 1.52 m (5.0 ft) east of the SE corner of the Cabrillo Beach Maintenance Building, and 0.55 m (1.8 ft) west of a 4-inch square wooden witness post and sign. The bench mark is crimped to a copper-clad steel rod driven to a depth of 4.3 m (14 ft).
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 9 of 10 Station ID: 9410650 PUBLICATION DATE: 05/15/2003 Name: CABRILLO BEACH CA NOAA Chart: 18751 Latitude: 33° 42.4' N ( 33.70670) USGS Quad: LONG BEACH Longitude: 118° 16.4' W (-118.27300) T I D A L D A T U M S Tidal datums at CABRILLO BEACH based on: LENGTH OF SERIES: 5 Years TIME PERIOD: January 1974 - December 1980 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 9410660 LOS ANGELES, OUTER HARBOR Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (01/07/1974) = 2.267 MEAN HIGHER HIGH WATER MHHW = 1.671 MEAN HIGH WATER MHW = 1.446 MEAN TIDE LEVEL MTL = 0.866 MEAN SEA LEVEL MSL = 0.860 MEAN LOW WATER MLW = 0.286 North American Vertical Datum NAVD88 = 0.075 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (12/08/1980) = -0.976 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW NO 12 1973 4.257 2.811 NO 3 1950 3.620 2.174 NO 4 1950 4.221 2.775 NO 5 1950 5.496 4.050 NO 9 1973 4.227 2.781 NO 10 1973 4.212 2.766 NO 11 1973 4.189 2.743 NO 13 1973 4.370 2.924 0650 S 1980 3.792 2.346 0650 T 1980 4.411 2.965
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 10 of 10 Station ID: 9410650 PUBLICATION DATE: 05/15/2003 Name: CABRILLO BEACH CA NOAA Chart: 18751 Latitude: 33° 42.4' N ( 33.70670) USGS Quad: LONG BEACH Longitude: 118° 16.4' W (-118.27300) 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.