U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 9459949 PUBLICATION DATE: 11/21/2013 Name: COLD BAY (2 MILES W OF DELTA PT) AK NOAA Chart: 16549 Latitude: 55° 12.5' N ( 55.20830) USGS Quad: COLD BAY (A-3) Longitude: 162° 41.9' W (-162.69800) From the shack on the Cold Bay Pier, proceed SW along the pier for 154.7 m on a course on the edge of the boat ramp entrance, then proceed 45.2 m on a course near the telephone booth. The bench marks are located along and near the Cold Bay pier. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 9949 D 2013 DESIGNATION: 945 9949 D MONUMENTATION: Tidal Station disk VM#: 20854 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Cemented into peir OPUS PID: LATITUDE: 55° 12.3' N ( 55.20550) LONGITUDE: 162° 42.0' W (-162.70050) The benchmark is a disk set flush into the Cold Bay pier approximately 356.8 m (1170.6 ft) SW from the shack at the end of the pier, 293.9 m (964.2 ft) NE from bench mark 945 9949 A, 259.4 m (851.0 ft) NE from bench mark 945 9949 B, 204.1 m (669.3 ft) SW from bench mark 945 9949 E, and 147.7 m (484.6 ft) NE from bench mark 945 9949 C.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 9459949 PUBLICATION DATE: 11/21/2013 Name: COLD BAY (2 MILES W OF DELTA PT) AK NOAA Chart: 16549 Latitude: 55° 12.5' N ( 55.20830) USGS Quad: COLD BAY (A-3) Longitude: 162° 41.9' W (-162.69800) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 9949 E 2013 DESIGNATION: 945 9949 E MONUMENTATION: Tidal Station disk VM#: 20853 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Cemented into peir OPUS PID: LATITUDE: 55° 12.4' N ( 55.20650) LONGITUDE: 162° 41.9' W (-162.69800) The bench mark is a disk set flush into the Cold Bay pier located 497.7 m NE of bench mark 945 9949 A, 463.8 m (1521.7 ft) NE of bench mark 945 9949 B, 352.1 m (1155.2 ft) of 945 9949 bench mark C, 204.1 m (669.6 ft) NE of bench mark 949 9949 D, and 155.7 m (510.8 ft) SW of the shack at the end of the pier. BENCH MARK STAMPING: 9949 C 2013 DESIGNATION: 945 9949 C MONUMENTATION: Tidal Station disk VM#: 20855 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Cemented into the peir OPUS PID: LATITUDE: 55° 12.3' N ( 55.20467) LONGITUDE: 162° 42.1' W (-162.70233) The benchmark is a disk set flush into the Cold Bay pier approximately 504.5 m (1,655.2 ft) SW from the shack at the end of the pier, 352.4 m (1,156.2 ft) SW from bench mark 945 9949 E, 147.7 m (484.6 ft) SW from bench mark 945 9949 D, 147.4 m (483.6 ft) NE from bench mark 945 9949 A, and 112.6 m (369.4 ft) NE from bench mark 945 9949 B.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 9459949 PUBLICATION DATE: 11/21/2013 Name: COLD BAY (2 MILES W OF DELTA PT) AK NOAA Chart: 16549 Latitude: 55° 12.5' N ( 55.20830) USGS Quad: COLD BAY (A-3) Longitude: 162° 41.9' W (-162.69800) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 9949 B 2013 DESIGNATION: 945 9949 B MONUMENTATION: Tidal Station disk VM#: 20856 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Cemented into concrete boat ramp OPUS PID: LATITUDE: 55° 12.3' N ( 55.20417) LONGITUDE: 162° 42.2' W (-162.70400) The benchmark is a disk set flush into the concrete boat ramp at the base of the Cold Bay pier approximately 616.6 m (2023.0 ft) SW from the shack at the end of the pier, 464.0 m (1522.3 ft) SW from bench mark 945 9949 E, 259.8 m (852.4 ft) SW from bench mark 945 9949 D, 112.6 m (369.4 ft) SW from bench mark 945 9949 C, and 45.9 m (150.6 ft) north from bench mark 945 9949 A. BENCH MARK STAMPING: 9949 A 2013 DESIGNATION: 945 9949 A MONUMENTATION: Tidal Station disk VM#: 20857 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Cemented into telephone booth foundationOPUS PID: LATITUDE: 55° 12.2' N ( 55.20367) LONGITUDE: 162° 42.3' W (-162.70417) The benchmark is a disk set flush into the cement base of the telephone booth near the base of the Cold Bay pier approximately 650.9 m (2135.5 ft) SW from the shack at the end of the pier, 497.9 m (1633.5 ft) SW from bench makr 945 9949 E, 294 m (964.6 ft) SW from bench mark 945 9949 D, 147.4 m (483.6 ft) SW from bench mark 945 9949 C, and 45.9 m (150.6 ft) south from bench mark 945 9949 A.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 9459949 PUBLICATION DATE: 11/21/2013 Name: COLD BAY (2 MILES W OF DELTA PT) AK NOAA Chart: 16549 Latitude: 55° 12.5' N ( 55.20830) USGS Quad: COLD BAY (A-3) Longitude: 162° 41.9' W (-162.69800) T I D A L D A T U M S Tidal datums at COLD BAY (2 MILES W OF DELTA PT) based on: LENGTH OF SERIES: 1 MONTH TIME PERIOD: August 24, 2013 - September 23, 2013 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 9459881 KING COVE, DEER PASSAGE, PACIFIC OCEAN Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 2.262 MEAN HIGH WATER MHW = 2.048 MEAN TIDE LEVEL MTL = 1.228 MEAN SEA LEVEL MSL = 1.216 MEAN LOW WATER MLW = 0.408 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 9949 D 2013 5.857 3.809 9949 E 2013 5.868 3.821 9949 C 2013 6.594 4.546 9949 B 2013 13.624 11.576 9949 A 2013 15.161 13.113
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 9459949 PUBLICATION DATE: 11/21/2013 Name: COLD BAY (2 MILES W OF DELTA PT) AK NOAA Chart: 16549 Latitude: 55° 12.5' N ( 55.20830) USGS Quad: COLD BAY (A-3) Longitude: 162° 41.9' W (-162.69800) 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.