U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 9457391 PUBLICATION DATE: 06/29/2018 Name: PORT LIONS, KODIAK ISLAND AK NOAA Chart: 165942 Latitude: 57° 52.4' N ( 57.87347) USGS Quad: KODIAK (D-5) Longitude: 152° 52.0' W (-152.86711) To reach the bench marks from the Kodiak airport travel by vehicle 8.8 km (7.2 mi) NE to St. Paul s Harbor in the city of Kodiak, then from St. Paul s Harbor travel 9.6 km (5.2 nm) NE by boat out the Near Island Channel until the red # 4 navigation aid is to port, then keep the navigation aid to port and turn to the NW for 25.9 km (14.0 nm) entering Narrow Strait and Ouzinkie Narrows. Once past Three Brothers light and Shakmanof Point, turn SW into Kizhuyak Bay for 15.7 km (8.5 nm) and enter Settler Cove into Port Lions Harbor. The tidal bench marks are located in the vicinity of the beach. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 7391 C 2009 DESIGNATION: 945 7391 C MONUMENTATION: Tidal Station disk VM#: 19374 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Bedrock OPUS PID#: BBBL13 LATITUDE: 57° 52.4' N ( 57.87347) LONGITUDE: 152° 52.0' W (-152.86711) The primary bench mark is set flush in smooth, black shale outcrop, on the east side of a gravel launch ramp at the south end of Port Lions Small Boat Harbor, 110.00 m (360.9 ft) NE of bench mark 945 7391 B, 48.00 m (147.5 ft) WSW of bench mark 945 7391 D, 32.15 m ( 105.5 ft) east of the NE corner of the wood framed Harbor Masters building,and 7.11 m (23.3 ft) SE of the centerline of a gravel boat launch.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 9457391 PUBLICATION DATE: 06/29/2018 Name: PORT LIONS, KODIAK ISLAND AK NOAA Chart: 165942 Latitude: 57° 52.4' N ( 57.87347) USGS Quad: KODIAK (D-5) Longitude: 152° 52.0' W (-152.86711) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 7391 A 2009 DESIGNATION: 945 7391 A MONUMENTATION: Tidal Station disk VM#: 19375 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Boulder OPUS PID: LATITUDE: 57° 52.4' N ( 57.87281) LONGITUDE: 152° 52.2' W (-152.86947) The bench mark is set flush in smooth, black shale outcropping rock 2.13 m (7.0 ft) long by 1.00 m (3.3 ft) wide, 73.45 m (241.0 ft) SSW of bench mark 945 7391 B, 9.45 m (31.0 ft) NW of the second prominent shale point SW of Port Lions small boat harbor, 2.60 m (8.5 ft) north of a 10 m (32.8 ft) high shale cliff and 0.36 m (1.2 ft) above beach level. BENCH MARK STAMPING: 7391 B 2009 DESIGNATION: 945 7391 B MONUMENTATION: Tidal Station disk VM#: 19376 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Bedrock outcrop OPUS PID: LATITUDE: 57° 52.4' N ( 57.87319) LONGITUDE: 152° 52.1' W (-152.86858) The bench mark is set flush in smooth, black shale ledge on a 10.0 m (32.8 ft) cliff , 110.0 m (360.9 ft) SW of bench mark 945 7397 C, 73.45 m (241.0 ft) N NE of bench mark 945 7391 A, 10.33 m (33.9 ft) north of the first prominent shale point west of Port Lions small boat harbor, 2.65 m (8.7 ft) south SW of toe of granite rip rap, and 0.55 m (1.8 ft) above beach level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 9457391 PUBLICATION DATE: 06/29/2018 Name: PORT LIONS, KODIAK ISLAND AK NOAA Chart: 165942 Latitude: 57° 52.4' N ( 57.87347) USGS Quad: KODIAK (D-5) Longitude: 152° 52.0' W (-152.86711) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 7391 D 2009 DESIGNATION: 945 7391 D MONUMENTATION: Tidal Station disk VM#: 19377 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Boulder OPUS PID: LATITUDE: 57° 52.4' N ( 57.87344) LONGITUDE: 152° 52.0' W (-152.86633) The bench mark is set flush in a 1.90 m by 2.25 m by 0.88 m granite boulder near the NW end of the breakwater, 48.00 m (157.5 ft) ENE of bench mark 945 7391 C, 45.72 m (150.0 ft) NE of a lamp standard on the north side of Port Lions Pier where the pier meets the shore, and 31.08 m (101.2 ft) east of the south side of parking area where a gravel road leads to a shale beach on the north side of the pier. BENCH MARK STAMPING: 7391 E 2009 DESIGNATION: 945 7391 E MONUMENTATION: Tidal Station disk VM#: 19378 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Bedrock outcrop OPUS PID: LATITUDE: 57° 52.4' N ( 57.87408) LONGITUDE: 152° 52.0' W (-152.86650) The bench mark is set flush in a rectangular 2.44 m by 1.37 m smooth black shale boulder on a small shale beach north (outside) of the breakwater, 66.0 m (216.5 ft) NNW of bench mark 945 7391 D, 9.63 m (31.6 ft) north of the end of granite rip rap armoring the coast north of the breakwater, 2.80 m (9.2 ft) NE of overhanging shale cliff 10.00 m high, and 0.54m (1.8 ft) above beach level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 9457391 PUBLICATION DATE: 06/29/2018 Name: PORT LIONS, KODIAK ISLAND AK NOAA Chart: 165942 Latitude: 57° 52.4' N ( 57.87347) USGS Quad: KODIAK (D-5) Longitude: 152° 52.0' W (-152.86711) T I D A L D A T U M S Tidal datums at PORT LIONS, KODIAK ISLAND based on: LENGTH OF SERIES: 30 DAYS TIME PERIOD: Jul 7 2009 - Aug 5 2009 TIDAL EPOCH: 2012-2016 CONTROL TIDE STATION: 9457292 KODIAK ISLAND, WOMENS BAY Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 2.854 MEAN HIGH WATER MHW = 2.576 MEAN TIDE LEVEL MTL = 1.463 MEAN SEA LEVEL MSL = 1.462 MEAN LOW WATER MLW = 0.350 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 7391 C 2009 3.350 0.773 7391 A 2009 2.620 0.043 7391 B 2009 2.781 0.204 7391 D 2009 2.445 -0.131 7391 E 2009 2.559 -0.017
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 9457391 PUBLICATION DATE: 06/29/2018 Name: PORT LIONS, KODIAK ISLAND AK NOAA Chart: 165942 Latitude: 57° 52.4' N ( 57.87347) USGS Quad: KODIAK (D-5) Longitude: 152° 52.0' W (-152.86711) 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.