U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 9451346 PUBLICATION DATE: 11/13/2003 Name: PAPKE'S LANDING, WRANGELL NARROWS AK NOAA Chart: 17375 Latitude: 56° 40.6' N ( 56.67670) USGS Quad: PETERSBURG (C-3) Longitude: 132° 56.0' W (-132.93300) To reach the tidal bench marks from the Alaska State Ferry Terminal in Petersburg, Alaska, proceed south on the Mitkof Highway for 14 km (9 mi) to Papke's Landing Road. Turn right and proceed west on Papke's Landing Road for 0.8 km (0.5 mi) to its terminus. The tidal bench marks are located on the eastern side of Wrangell Narrows on either side of the State Warf. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 1346 E 2003 DESIGNATION: 945 1346 E MONUMENTATION: Tidal Station disk VM#: 17257 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Boulder OPUS PID#: BBBC61 LATITUDE: 56° 40.6' N ( 56.67670) LONGITUDE: 132° 56.0' W (-132.93300) The bench mark is a disk set in the top of a large, flat topped boulder in SW corner of a blast rock pile forming parking area/pull-off for a private gravel road paralleling Wrangell Narrows, 53 m (174 ft) south of eastern end of state wharf walkway, 48.31 m (158.5 ft) south of bench mark 1346 D 2003, and 9 m (30 ft) west of road centerline.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 9451346 PUBLICATION DATE: 11/13/2003 Name: PAPKE'S LANDING, WRANGELL NARROWS AK NOAA Chart: 17375 Latitude: 56° 40.6' N ( 56.67670) USGS Quad: PETERSBURG (C-3) Longitude: 132° 56.0' W (-132.93300) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 1346 A 2003 DESIGNATION: 945 1346 A MONUMENTATION: Tidal Station disk VM#: 17253 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete boat ramp OPUS PID: LATITUDE: 56° 40.7' N ( 56.67830) LONGITUDE: 132° 56.1' W (-132.93500) The bench mark is a disk set vertically in the southern edge of a concrete boat ramp, 60 m (197 ft) north of the eastern end of the state wharf walkway, 30 m (98 ft) SW of log sorting area, 25 m (81 ft) NW of bench mark 1346 B 2003, and 12 m (39 ft) west of the SE edge of the concrete boat ramp. BENCH MARK STAMPING: 1346 B 2003 DESIGNATION: 945 1346 B MONUMENTATION: Tidal Station disk VM#: 17254 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Boulder OPUS PID: LATITUDE: 56° 40.7' N ( 56.67830) LONGITUDE: 132° 56.0' W (-132.93300) The bench mark is a disk set in top of the largest of two rounded boulders, 54 m (178 ft) north of bench mark 1346 C 2003, 40 m (131 ft) north of eastern end of state wharf walkway, 25 m (81 ft) SE of bench mark 1346 A 2003, 2 m (6 ft) west of grass line, and slightly below apparent high water mark.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 9451346 PUBLICATION DATE: 11/13/2003 Name: PAPKE'S LANDING, WRANGELL NARROWS AK NOAA Chart: 17375 Latitude: 56° 40.6' N ( 56.67670) USGS Quad: PETERSBURG (C-3) Longitude: 132° 56.0' W (-132.93300) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 1346 C 2003 DESIGNATION: 945 1346 C MONUMENTATION: Tidal Station disk VM#: 17255 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Boulder OPUS PID: LATITUDE: 56° 40.6' N ( 56.67670) LONGITUDE: 132° 56.0' W (-132.93300) The bench mark is a disk set in the top of a large, flat boulder in an area of medium sized boulders on a cobble beach, 54 m (178 ft) south of bench mark 1346 B 2003, 12 m (39 ft) west of bench mark 1346 D 2003, 4 m (13 ft) south of eastern end of state wharf walkway, 0.21 m (0.7 ft) south of an iron stem in drill hole, and 8 m (26 ft) below high water line. Note: The bench mark is generally under water at high tide. BENCH MARK STAMPING: 1346 D 2003 DESIGNATION: 945 1346 D MONUMENTATION: Tidal Station disk VM#: 17256 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Boulder OPUS PID: LATITUDE: 56° 40.6' N ( 56.67670) LONGITUDE: 132° 56.0' W (-132.93300) The bench mark is a disk set in top of the easternmost large flat boulder in cluster of three boulders at grass line, 48.31 m (158.5 ft) north of bench mark 1346 E 2003, 12 m (39 ft) east of bench mark 1346 C 2003, 5.00 m (16.4 ft) south of eastern end of state wharf walkway, and 1 m (3 ft) north of 50 m (164 ft) tall Sitka Spruce tree.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 9451346 PUBLICATION DATE: 11/13/2003 Name: PAPKE'S LANDING, WRANGELL NARROWS AK NOAA Chart: 17375 Latitude: 56° 40.6' N ( 56.67670) USGS Quad: PETERSBURG (C-3) Longitude: 132° 56.0' W (-132.93300) T I D A L D A T U M S Tidal datums at PAPKE'S LANDING, WRANGELL NARROWS based on: LENGTH OF SERIES: 2 MONTHS TIME PERIOD: August 2003 - September 2003 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 9450460 KETCHIKAN, TONGASS NARROWS Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 4.997 MEAN HIGH WATER MHW = 4.725 MEAN TIDE LEVEL MTL = 2.604 MEAN SEA LEVEL MSL = 2.603 MEAN LOW WATER MLW = 0.483 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 1346 E 2003 5.442 0.717 1346 A 2003 6.326 1.601 1346 B 2003 5.481 0.756 1346 C 2003 4.624 -0.101 1346 D 2003 6.063 1.338
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 9451346 PUBLICATION DATE: 11/13/2003 Name: PAPKE'S LANDING, WRANGELL NARROWS AK NOAA Chart: 17375 Latitude: 56° 40.6' N ( 56.67670) USGS Quad: PETERSBURG (C-3) Longitude: 132° 56.0' W (-132.93300) 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.