U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 8 Station ID: 9464212 PUBLICATION DATE: 06/17/2019 Name: VILLAGE COVE, ST. PAUL ISLAND AK NOAA Chart: 16382 Latitude: 57° 7.5' N ( 57.12530) USGS Quad: PRIBILOF ISLANDS (C-4) Longitude: 170° 17.1' W (-170.28520) To reach the tidal bench marks from the U.S. Post Office in Village Cove, proceed 0.2 km (0.1 mi) south to a stop sign, then 0.3 km (0.2 mi) west to the AC Store, then 0.2 km (0.1 mi) NNW to the dry dock, then 0.3 km (0.2 mi) NW to the City dock. The bench marks are located along the road from the AC Store to the City dock. The tide gauge are located in the City fuel shed on the southern end of the City dock. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: RBD 1 1994 DESIGNATION: 946 4212 RBD 1 MONUMENTATION: Survey disk VM#: 16795 AGENCY: US Army Corps of Engineers (USE) IDB PID: SETTING CLASSIFICATION: Boulder OPUS PID: LATITUDE: 57° 7.4' N ( 57.12386) LONGITUDE: 170° 17.1' W (-170.28472) The primary bench mark is a disk painted red and white and set flush in a 2 m x 1 m x 1 m (6 ft x 4 ft x 4 ft) high boulder, 59.30 m (194.6 ft) SSE of the furthest south light pole on the east side of the seawall, 46 m (151 ft) SW of the centerline of the elbow in the road, 5 m (16 ft) SW of the east edge of the rip rap, and 3 m (10 ft) WNW of the edge of the bluff.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 8 Station ID: 9464212 PUBLICATION DATE: 06/17/2019 Name: VILLAGE COVE, ST. PAUL ISLAND AK NOAA Chart: 16382 Latitude: 57° 7.5' N ( 57.12530) USGS Quad: PRIBILOF ISLANDS (C-4) Longitude: 170° 17.1' W (-170.28520) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 4 1946 DESIGNATION: 946 4212 TIDAL 4 MONUMENTATION: Tidal Station disk VM#: 9653 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID: SETTING CLASSIFICATION: Concrete foundation OPUS PID: LATITUDE: 57° 7.3' N ( 57.12161) LONGITUDE: 170° 16.8' W (-170.28056) The bench mark is set vertically in the north side of a concrete foundation of a one-story blue and white building, 30.50 m (100.1 ft) SW of the SW corner of the AC Store, 14.33 m (47.0 ft) SE from the center of a fire hydrant, 7.10 m (23.3 ft) SE from the center of a manhole cover, 7.00 m (23.0 ft) west from the centerline of the road, 0.62 m (2.0 ft) west of the east wall of the building, and 0.42 m (1.4 ft) above the ground. BENCH MARK STAMPING: NO 3 1946 DESIGNATION: 946 4212 TIDAL 3 MONUMENTATION: Tidal Station disk VM#: 16791 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID: SETTING CLASSIFICATION: Concrete step OPUS PID: LATITUDE: 57° 7.4' N ( 57.12300) LONGITUDE: 170° 16.9' W (-170.28150) The bench mark is set flush in the north corner of a 0.6 m x 0.6 m x 0.8 m (1.9 ft x 1.9 ft x 2.6 ft) triangular shaped lower concrete step in front of the doorway of the Machine Shop, 19.81 m (65.0 ft) north of the SE corner of the Machine Shop, 15.35 m (50.4 ft) west of a fire hydrant, 0.56 m (1.8 ft) ENE of the SE side of the door jam, 0.15 m (0.5 ft) below the door to the Machine Shop, and 0.03 m (0.1 ft) above ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 8 Station ID: 9464212 PUBLICATION DATE: 06/17/2019 Name: VILLAGE COVE, ST. PAUL ISLAND AK NOAA Chart: 16382 Latitude: 57° 7.5' N ( 57.12530) USGS Quad: PRIBILOF ISLANDS (C-4) Longitude: 170° 17.1' W (-170.28520) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 4212 N 2002 DESIGNATION: 946 4212 N MONUMENTATION: Tidal Station disk VM#: 16792 AGENCY: National Ocean Service (NOS) IDB PID: SETTING CLASSIFICATION: Concrete dock OPUS PID: LATITUDE: 57° 7.5' N ( 57.12531) LONGITUDE: 170° 17.1' W (-170.28514) The bench mark is set flush in the SE corner of the city fuel dock, 13.10 m (43.0 ft) SE of the center of a concrete well 1 m (3 ft) high and 1.10 m (3.5 ft) in diameter, 12.05 m (39.5 ft) east of a light pole, 9.51 m (31.2 ft) east of the SE corner of the city tool shed, 8.07 m (26.5 ft) south of a 1.20 m (4.0 ft) high bollard which measures 0.17 m (0.55 ft) in diameter, 3.05 m (10.0 ft) east of the southeasterly-most fuel valve, 1.40 m (4.6 ft) east of the east side of a dock ladder, 1.31 m (4.3 ft) west of the east face of the dock, 0.67 m (2.2 ft) north of the south face of the dock, and 0.27 m (0.9 ft) south of the south edge of a 2.44 m (8.0 ft) concrete catch basin.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 8 Station ID: 9464212 PUBLICATION DATE: 06/17/2019 Name: VILLAGE COVE, ST. PAUL ISLAND AK NOAA Chart: 16382 Latitude: 57° 7.5' N ( 57.12530) USGS Quad: PRIBILOF ISLANDS (C-4) Longitude: 170° 17.1' W (-170.28520) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 4212 P 2002 DESIGNATION: 946 4212 P MONUMENTATION: Tidal Station disk VM#: 16793 AGENCY: National Ocean Service (NOS) IDB PID: SETTING CLASSIFICATION: Concrete pad OPUS PID#: BBBH46 LATITUDE: 57° 7.5' N ( 57.12567) LONGITUDE: 170° 17.1' W (-170.28572) The bench mark is set flush in a concrete pad on the city fuel dock, 21.25 m (69.7 ft) NNE of the NE corner of a shed attached to the Harbor Master's Office, 21.25 m (69.7 ft) WSW from the center of the northern-most bollard on the east edge of the dock, 8.70 m (28.5 ft) west of a lightpole on the north edge of the dock, 1.90 m (6.2 ft) east of the center of three holes on top of the metal anchor for ship lines, 1.80 m (5.9 ft) south of the NE corner of the concrete pad, and 0.34 m (1.1 ft) west of the east edge of the concrete pad. BENCH MARK STAMPING: TERRA SURVEYS SP-3 USACE 2001 DESIGNATION: 946 4212 TERRA SP3 MONUMENTATION: Survey disk VM#: 16794 AGENCY: US Army Corp of Engineers (USACE) IDB PID: SETTING CLASSIFICATION: Concrete block OPUS PID#: BBCN02 LATITUDE: 57° 7.5' N ( 57.12422) LONGITUDE: 170° 16.9' W (-170.28139) The bench mark is set flush in a concrete block 3.07 m x 2.77 m x 0.98 m high (10.1 ft x 9.1 ft x 3.2 ft) the length of which bears northerly, 34.44 m (113.0 ft) ESE of the SE corner of a concrete pier, 14.63 m (48.0 ft) south of the top of the breakwater, 1.78 m (5.8 ft) north of the south edge of the block, and 1.25 m (4.1 ft) west of the east edge of the block.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 8 Station ID: 9464212 PUBLICATION DATE: 06/17/2019 Name: VILLAGE COVE, ST. PAUL ISLAND AK NOAA Chart: 16382 Latitude: 57° 7.5' N ( 57.12530) USGS Quad: PRIBILOF ISLANDS (C-4) Longitude: 170° 17.1' W (-170.28520) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 4212 Q 2008 DESIGNATION: 946 4212 Q MONUMENTATION: Tidal Station disk VM#: 18989 AGENCY: National Ocean Service (NOS) IDB PID: SETTING CLASSIFICATION: Bedrock OPUS PID: LATITUDE: 57° 7.4' N ( 57.12361) LONGITUDE: 170° 17.1' W (-170.28419) The bench mark is set flush in a bedrock outcrop midway up the bluff south of the Trident Seafood building and below the fuel tanks, 16.25 m (53.3 ft) south up the slope from the SE corner of a small shed at the base of the bluff, 16.02 m (52.6 ft) NNE on the slope down from the top of the bluff, 11.21 m (36.8 ft) west from the highest point of a prominent rock pile slightly higher than the bench mark, and 2.19 m (7.2 ft) east from a 1/2 inch metal pipe and a 1 1/2 inch PVC conduit running from the top of the bluff down to the shed at the base of the bluff. BENCH MARK STAMPING: 4212 R 2008 DESIGNATION: 946 4212 R MONUMENTATION: Tidal Station disk VM#: 18990 AGENCY: National Ocean Service (NOS) IDB PID: SETTING CLASSIFICATION: Bedrock OPUS PID: LATITUDE: 57° 7.4' N ( 57.12344) LONGITUDE: 170° 17.0' W (-170.28308) The bench mark is set flush in a bedrock outcrop midway up the bluff south of the Trident Seafood building and below the fuel tanks, 28.70 m (94.16 ft) east from the center of a 0.16 m diameter gas pipeline from the Delta Western fuel tanks running downhill to the truck filling station, 10.59 m (34.7 ft) up the slope SSW from the top of a fire hydrant, 7.30 m (24.0 ft) up the slope south from the center of a vertical 0.60 m (2.0 ft) diameter corrugated culvert pipe, and 0.74 m (2.4 ft) above the surrounding slope.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 8 Station ID: 9464212 PUBLICATION DATE: 06/17/2019 Name: VILLAGE COVE, ST. PAUL ISLAND AK NOAA Chart: 16382 Latitude: 57° 7.5' N ( 57.12530) USGS Quad: PRIBILOF ISLANDS (C-4) Longitude: 170° 17.1' W (-170.28520) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 4212 S 2008 DESIGNATION: 946 4212 S MONUMENTATION: Tidal Station disk VM#: 18991 AGENCY: National Ocean Service (NOS) IDB PID: SETTING CLASSIFICATION: Bedrock OPUS PID: LATITUDE: 57° 7.4' N ( 57.12281) LONGITUDE: 170° 16.9' W (-170.28139) The bench mark is set flush in a bedrock outcrop west of a gravel driveway leading to the south side of the Machine Shop, 24.11 m (79.1 ft) NW of a 0.10 m (0.3 ft) square by 0.83 m (2.7 ft) high metal monitoring well box, 18.01 m (59.1 ft) SSE from the west side of the double door on the south side of the Machine Shop, 17.88 m (58.7 ft) SW from the SW corner of a gray 2.0 m (6 ft) tall electrical junction box, and 1.00 m (3.3 ft) above the gravel driveway. BENCH MARK STAMPING: 4212 T 2008 DESIGNATION: 946 4212 T MONUMENTATION: Tidal Station disk VM#: 18992 AGENCY: National Ocean Service (NOS) IDB PID: SETTING CLASSIFICATION: Concrete pad OPUS PID: LATITUDE: 57° 7.6' N ( 57.12728) LONGITUDE: 170° 17.2' W (-170.28683) The bench mark is set flush in a concrete pad on the northern most pier in the harbor, 33.15 m (108.8 ft) SSW from the NE corner of the gravel fill pier, 30.35 m (99.6 ft) NE from the base of the rip rap sea wall across the road, 21.52 m (70.6 ft) west from the bollard at the SE corner of the pier, 9.36 m (30.7 ft) WSW from the west side of mounted yellow case containing a life ring, 4.95 m (16.2 ft) from the center of a 0.5 m (2 ft) high valve, and 0.31 m (1.0 ft) west of the east edge of the concrete pad.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 8 Station ID: 9464212 PUBLICATION DATE: 06/17/2019 Name: VILLAGE COVE, ST. PAUL ISLAND AK NOAA Chart: 16382 Latitude: 57° 7.5' N ( 57.12530) USGS Quad: PRIBILOF ISLANDS (C-4) Longitude: 170° 17.1' W (-170.28520) T I D A L D A T U M S Tidal datums at VILLAGE COVE, ST. PAUL ISLAND based on: LENGTH OF SERIES: 9 YEARS TIME PERIOD: 3/07-2/10, 10/10-9/11, 1/13-12/17 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 9462620 UNALASKA, DUTCH HARBOR Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (12/08/2006) = 1.549 MEAN HIGHER HIGH WATER MHHW = 0.986 MEAN HIGH WATER MHW = 0.912 MEAN TIDE LEVEL MTL = 0.596 MEAN SEA LEVEL MSL = 0.573 MEAN LOW WATER MLW = 0.280 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum NAVD88 = -0.222 LOWEST OBSERVED WATER LEVEL (12/06/2010) = -0.695 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW RBD 1 1994 8.635 7.723 NO 4 1946 9.841 8.929 NO 3 1946 4.657 3.745 4212 N 2002 3.232 2.320 4212 P 2002 3.742 2.830 TERRA SURVEYS SP-3 USACE 2001 4.637 3.725 4212 Q 2008 12.715 11.803 4212 R 2008 11.607 10.695 4212 S 2008 8.948 8.036 4212 T 2008 3.726 2.814
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 8 of 8 Station ID: 9464212 PUBLICATION DATE: 06/17/2019 Name: VILLAGE COVE, ST. PAUL ISLAND AK NOAA Chart: 16382 Latitude: 57° 7.5' N ( 57.12530) USGS Quad: PRIBILOF ISLANDS (C-4) Longitude: 170° 17.1' W (-170.28520) 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.