U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 9469439 PUBLICATION DATE: 03/19/2009 Name: TIN CITY, BERING SEA AK NOAA Chart: 16204 Latitude: 65° 33.5' N ( 65.55830) USGS Quad: TELLER (C-7) Longitude: 167° 58.5' W (-167.97500) To reach the tidal bench marks from the bay door on the ENE side of the USAF living quarters, proceed 0.15 km (0.1 mi) WSW on the gravel road, turn right at the intersection with another gravel road and proceed NW 0.2 km (0.12 mi) and then 0.35 km (0.2 mi) SSW around a U shaped bend to the base of the tram which leads up to the radar, leave the road to continue around the tram building and turn left and proceed SE downhill 0.2 km (0.12 mi), then turn right and continue SW around the base of the bluff 0.4 km (0.25 mi) to a gully which leads down to the beach. The tide gauge was located on top of the bluff and the orifice was located on the rock outcrop at the base of the bluff. The bench marks are located in rock outcrops along 0.5 km (0.3 mi) of the shoreline east of the gully. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: TIN CITY NO 2 1960 DESIGNATION: 946 9439 TIDAL 2 MONUMENTATION: Tidal Station disk VM#: 18436 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: SETTING CLASSIFICATION: Rock outcrop OPUS PID#: BBCC46 LATITUDE: 65° 33.5' N ( 65.55911) LONGITUDE: 167° 58.7' W (-167.97900) The primary bench mark is a disk set in a large rock outcrop, 31.90 m (104.6 ft) SW of the east end of the rock outcrop, 25.40 m (83.3 ft) NE of the western edge of the outcrop and a small channel separating an offshore outcrop, 20.20 m (66.3 ft) south of the base of the dirt bluff, 17.80 m (58.4 ft) NNW of the seaward extent of the rock outcrop, and 9.97 m (32.7 ft) west of the orifice pipe.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 9469439 PUBLICATION DATE: 03/19/2009 Name: TIN CITY, BERING SEA AK NOAA Chart: 16204 Latitude: 65° 33.5' N ( 65.55830) USGS Quad: TELLER (C-7) Longitude: 167° 58.5' W (-167.97500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 9439 A 2007 DESIGNATION: 946 9439 A MONUMENTATION: Tidal Station disk VM#: 18437 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Rock outcrop OPUS PID: LATITUDE: 65° 33.6' N ( 65.56000) LONGITUDE: 167° 58.6' W (-167.97658) The bench mark is a disk set flush in an offshore rock outcrop, 32.6 m (106.9 ft) SE of the 30 m (100 ft) tall dirt bluff, 13 m (44 ft) SE of the beach line, 6 m (19 ft) SW of the east end of the rock outcrop, 5 m (16 ft) NE of the west end of the outcrop, and 4 m (14 ft) NNW of the seaward extent of the rock outcrop. BENCH MARK STAMPING: 9439 B 2007 DESIGNATION: 946 9439 B MONUMENTATION: Tidal Station disk VM#: 18438 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Rock outcrop OPUS PID: LATITUDE: 65° 33.6' N ( 65.56042) LONGITUDE: 167° 58.4' W (-167.97300) The bench mark is a disk set flush in a black rock outcrop that is nearly level with the beach, 61.30 m (201.0 ft) west of bench mark 946 9439 C, 2.40 m (7.9 ft) south of a 1 m (3 ft) high rock out crop above this bench mark, and 2.40 m (7.9 ft) north of the seaward edge of the rock outcrop.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 9469439 PUBLICATION DATE: 03/19/2009 Name: TIN CITY, BERING SEA AK NOAA Chart: 16204 Latitude: 65° 33.5' N ( 65.55830) USGS Quad: TELLER (C-7) Longitude: 167° 58.5' W (-167.97500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 9439 C 2007 DESIGNATION: 946 9439 C MONUMENTATION: Tidal Station disk VM#: 18439 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Rock outcrop OPUS PID: LATITUDE: 65° 33.6' N ( 65.56036) LONGITUDE: 167° 58.3' W (-167.97169) The bench mark is a disk set flush in the east end of a large gray and white rock outcrop, 103.20 m (338.6 ft) west of bench mark 946 9439 D, 61.30 m (201.1 ft) east of bench mark 946 9439 B, 0.72 m (2.4 ft) NNW of the seaward edge of the rock outcrop, and 0.44 m (1.4 ft) above the rock and sand beach. BENCH MARK STAMPING: 9439 D 2007 DESIGNATION: 946 9439 D MONUMENTATION: Tidal Station disk VM#: 18440 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Rock outcrop OPUS PID#: BBBG46 LATITUDE: 65° 33.6' N ( 65.56022) LONGITUDE: 167° 58.2' W (-167.96947) The bench mark is set flush in prominent dark gray rock outcrop, 103.20 m (338.6 ft) ENE of bench mark 946 9439 C, 17.79 m (58.4 ft) SW of the east edge of the high rock outcrop, 10.30 m (33.8 ft) south of the base of the dirt bluff, 8.90 m (29.2 ft) east of the west edge of the high rock outcrop, 6.54 m (21.4 ft) NW of the seaward extent of the rock outcrop, and approximately 2.60 m (9 ft) above the sand beach.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 9469439 PUBLICATION DATE: 03/19/2009 Name: TIN CITY, BERING SEA AK NOAA Chart: 16204 Latitude: 65° 33.5' N ( 65.55830) USGS Quad: TELLER (C-7) Longitude: 167° 58.5' W (-167.97500) T I D A L D A T U M S Tidal datums at TIN CITY, BERING SEA based on: LENGTH OF SERIES: 1 MONTH TIME PERIOD: September 2007 - September 2007 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 9491094 RED DOG DOCK Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 0.311 MEAN HIGH WATER MHW = 0.252 MEAN SEA LEVEL MSL = 0.144 MEAN TIDE LEVEL MTL = 0.141 MEAN LOW WATER MLW = 0.030 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW TIN CITY NO 2 1960 2.405 2.153 9439 A 2007 0.861 0.609 9439 B 2007 1.263 1.011 9439 C 2007 1.261 1.009 9439 D 2007 2.847 2.595
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 9469439 PUBLICATION DATE: 03/19/2009 Name: TIN CITY, BERING SEA AK NOAA Chart: 16204 Latitude: 65° 33.5' N ( 65.55830) USGS Quad: TELLER (C-7) Longitude: 167° 58.5' W (-167.97500) 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.