U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 7 Station ID: 9432895 PUBLICATION DATE: 07/26/2004 Name: NORTH BEND, COOS BAY OR NOAA Chart: 18587 Latitude: 43° 24.6' N ( 43.41000) USGS Quad: NORTH BEND Longitude: 124° 13.1' W (-124.21800) To reach the tidal bench marks from the North Bend Post Office at the intersection of McPherson and Connecticut Avenues, proceed south on McPherson Avenue for one block, then turn left and proceed east on California Avenue for 0.5 km (0.3 mi) to Sea Term Services Inc. on the north side of California Avenue, then enter through the south gate and proceed north for 0.3 km (0.2 mi) to a dock located on the east side of the yard. The bench marks are along the Southern Pacific Railroad tracks. The tide gage was on the inside SW corner of the dock, and the staff was lag bolted on the southernmost dock piling. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: BENCH MARK NO 3 1960 PORTLAND DIST. 1960 DESIGNATION: 943 2895 TIDAL 3 MONUMENTATION: Tidal Station disk VM#: 8809 AGENCY: US Army Corps of Engineers (USE) IDB PID#: OA0654 SETTING CLASSIFICATION: Sidewalk OPUS PID#: OA0654 LATITUDE: 43° 24.5' N ( 43.40830) LONGITUDE: 124° 13.3' W (-124.22200) The primary bench mark is a disk set flush in a sidewalk located on the south side and east end of California Avenue at the NE corner of the Jones Oregon Stevedoring Company building, 71 m (232 ft) east of the centerline of the main line of the railroad tracks, 9 m (31 ft) south of the centerline of California Avenue, 0.3 m (1 ft) west of the east end of a 2 m (5 ft) wide concrete sidewalk, and at ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 7 Station ID: 9432895 PUBLICATION DATE: 07/26/2004 Name: NORTH BEND, COOS BAY OR NOAA Chart: 18587 Latitude: 43° 24.6' N ( 43.41000) USGS Quad: NORTH BEND Longitude: 124° 13.1' W (-124.21800) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 23 1917 DESIGNATION: 23 MONUMENTATION: Survey disk VM#: 8808 AGENCY: US Geological Survey (USGS) IDB PID#: OA0499 SETTING CLASSIFICATION: Concrete bannister OPUS PID: LATITUDE: 43° 24.3' N ( 43.40500) LONGITUDE: 124° 13.3' W (-124.22200) The bench mark is a disk set flush in the SE concrete bannister at the top of a flight of concrete stairs, SW of the intersection of Washington Avenue and the Southern Pacific railroad tracks, 18 m (59 ft) south of utility pole #PPL 2513 158707 on the north side of Washington Avenue, 11 m (36 ft) west of the centerline of the main line of the railroad tracks, and 6 m (21 ft) NE of the centerline of Stanton Avenue.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 7 Station ID: 9432895 PUBLICATION DATE: 07/26/2004 Name: NORTH BEND, COOS BAY OR NOAA Chart: 18587 Latitude: 43° 24.6' N ( 43.41000) USGS Quad: NORTH BEND Longitude: 124° 13.1' W (-124.21800) T I D A L B E N C H M A R K S BENCH MARK STAMPING: HLT 6 1965 DESIGNATION: HLT 6 MONUMENTATION: Survey disk VM#: 8810 AGENCY: US Army Corps of Engineers (USE) IDB PID#: OA0626 SETTING CLASSIFICATION: Concrete step OPUS PID: LATITUDE: 43° 24.3' N ( 43.40500) LONGITUDE: 124° 13.3' W (-124.22200) The bench mark is a disk set flush in the top NW corner of a flight of concrete stairs, SW of the intersection of Washington Avenue and the Southern Pacific railroad tracks, 16 m (53 ft) south of utility pole #PPL 2513 158707 on the north side of Washington Avenue, 13 m (44 ft) west of the centerline of the main line of the railroad tracks, and 5 m (18 ft) NE of the centerline of Stanton Avenue.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 7 Station ID: 9432895 PUBLICATION DATE: 07/26/2004 Name: NORTH BEND, COOS BAY OR NOAA Chart: 18587 Latitude: 43° 24.6' N ( 43.41000) USGS Quad: NORTH BEND Longitude: 124° 13.1' W (-124.21800) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NORTH BEND TIDAL NO 1 1976 DESIGNATION: NORTH BEND TIDAL 1 MONUMENTATION: Survey disk VM#: 8811 AGENCY: US Army Corps of Engineers (USE) IDB PID#: SETTING CLASSIFICATION: Ground OPUS PID: LATITUDE: 43° 24.6' N ( 43.41000) LONGITUDE: 124° 13.1' W (-124.21800) The bench mark is a disk set into the ground amongst gravel next to the railroad tracks, 91 m (300 ft) north of the driveway of Sea Term Services Inc., 2 m (6 ft) east of the railroad tracks, and 1 m (2 ft) south of railroad siding switch #3755. BENCH MARK STAMPING: NORTH BEND TIDAL 2 1976 DESIGNATION: 943 2895 TIDAL N BEND 2 MONUMENTATION: Tidal Station disk VM#: 8812 AGENCY: US Army Corps of Engineers (USE) IDB PID#: OA0656 SETTING CLASSIFICATION: Concrete foundation OPUS PID: LATITUDE: 43° 24.5' N ( 43.40830) LONGITUDE: 124° 13.3' W (-124.22200) The bench mark is a disk set in short foundation remains just outside the main doorway of Sea Term Services, Inc. warehouse, at the east side of the doorway, and 0.3 m (1 ft) south of the wall.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 7 Station ID: 9432895 PUBLICATION DATE: 07/26/2004 Name: NORTH BEND, COOS BAY OR NOAA Chart: 18587 Latitude: 43° 24.6' N ( 43.41000) USGS Quad: NORTH BEND Longitude: 124° 13.1' W (-124.21800) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 2895 A 1982 DESIGNATION: 943 2895 A TIDAL MONUMENTATION: Tidal Station disk VM#: 8814 AGENCY: National Ocean Survey (NOS) IDB PID#: OA0655 SETTING CLASSIFICATION: Concrete pad OPUS PID: LATITUDE: 43° 24.5' N ( 43.40830) LONGITUDE: 124° 13.3' W (-124.22200) The bench mark is a disk set flush in the west edge of a concrete pad located between the two westernmost fuel tanks, south of the Sea Term Services, Inc. yard, 36 m (118 ft) north of the centerline of California Street, 10 m (34 ft) south of the chainlink fence marking the southern boundary of the Sea Term Services yard, 8.38 m (27.5 ft) east of the south entrance to the yard, and at ground level. NOTE: The mark is now under fill and pavemenet of the California Street Boat Ramp Parking Area. It is marked on the surface by a stainless steel washer and bolt embedded in the pavement. (Reported in 2001 by US Power Squadron)
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 7 Station ID: 9432895 PUBLICATION DATE: 07/26/2004 Name: NORTH BEND, COOS BAY OR NOAA Chart: 18587 Latitude: 43° 24.6' N ( 43.41000) USGS Quad: NORTH BEND Longitude: 124° 13.1' W (-124.21800) T I D A L D A T U M S Tidal datums at NORTH BEND, COOS BAY based on: LENGTH OF SERIES: 1 MONTH TIME PERIOD: September 1982 - September 1982 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 9432780 CHARLESTON, COOS BAY Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 2.568 MEAN HIGH WATER MHW = 2.370 MEAN SEA LEVEL MSL = 1.424 MEAN TIDE LEVEL MTL = 1.387 MEAN LOW WATER MLW = 0.404 North American Vertical Datum NAVD88 = 0.295 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW BENCH MARK NO 3 1960 PORTLAND DIST. 1960 3.926 1.556 23 1917 8.396 6.026 HLT 6 1965 8.031 5.661 NORTH BEND TIDAL NO 1 1976 4.948 2.578 NORTH BEND TIDAL 2 1976 4.706 2.336 2895 A 1982 4.189 1.819
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 7 Station ID: 9432895 PUBLICATION DATE: 07/26/2004 Name: NORTH BEND, COOS BAY OR NOAA Chart: 18587 Latitude: 43° 24.6' N ( 43.41000) USGS Quad: NORTH BEND Longitude: 124° 13.1' W (-124.21800) 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.