U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 7 Station ID: 9437540 PUBLICATION DATE: 04/21/2003 Name: GARIBALDI OREGON NOAA Chart: 18558 Latitude: 45° 33.3' N USGS Quad: NEHALEM Longitude: 123° 54.7' W To reach the tidal bench marks from the intersection of State Highway 6 and U.S. Highway 101, proceed north on U.S. Highway 101 for 14 km (9 mi) to the U.S. Coast Guard Tillamook Bay Station in Garibaldi. The bench marks are located in the areas around the U.S. Coast Guard station and the Oceanside Lumber Company. The tide gage and staff were located on the Coast Guard pier. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: TIDAL BM 7540 A 1978 DESIGNATION: 943 7540 TIDAL A MONUMENTATION: Tidal Station disk VM#: 8864 AGENCY: National Ocean Survey (NOS) PID: SETTING CLASSIFICATION: Concrete apron The bench mark is a disk set in a concrete apron around the restrooms at the U.S. Coast Guard station, 36.58 m (120.0 ft) north of the NE corner of the Troller Restaurant, 20.12 m (66.0 ft) west of the centerline of South Mooring Drive, 1.22 m (4.0 ft) SE of the SE corner of the restrooms, and 0.15 m (0.5 ft) north of the edge of the concrete apron. BENCH MARK STAMPING: 6 1927 DESIGNATION: 943 7540 TIDAL 6 MONUMENTATION: Tidal Station disk VM#: 8859 AGENCY: US Coast and Geodetic Survey (USC&GS) PID#: RD1243 SETTING CLASSIFICATION: Concrete monument The bench mark is a disk set in the top of a concrete monument, 183 m (600 ft) west of a large cement stack at Oceanside Lumber Company, 30.78 m (101.0 ft) east of Second Street between buildings 114 and 116, 9.60 m (31.5 ft) north of U.S. Highway 101 at the SW corner of a one-story building, and 1 m (3 ft) north of the west end of a concrete walk in front of an empty store.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 7 Station ID: 9437540 PUBLICATION DATE: 04/21/2003 Name: GARIBALDI OREGON NOAA Chart: 18558 Latitude: 45° 33.3' N USGS Quad: NEHALEM Longitude: 123° 54.7' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 7 1957 DESIGNATION: 943 7540 TIDAL 7 MONUMENTATION: Tidal Station disk VM#: 8860 AGENCY: US Coast and Geodetic Survey (USC&GS) PID: SETTING CLASSIFICATION: Concrete retaining wall The bench mark is a disk set in the top of a 1.07 m (3.5 ft) high concrete retaining wall at the southwesterly corner of Gregs Marine Service (formerly Oregon-Washington Plywood Company), 27 m (87 ft) NE of the centerline of a dirt road, 3.63 m (11.9 ft) NE of the NE edge of a 4 m x 5 m (12 ft x 16 ft) concrete slab, and 1.98 m (6.5 ft) SE of the SW corner of the building. BENCH MARK STAMPING: TIDAL 10 1970 DESIGNATION: 943 7540 TIDAL 10 MONUMENTATION: Tidal Station disk VM#: 8861 AGENCY: National Ocean Survey (NOS) PID: SETTING CLASSIFICATION: Concrete slab The primary bench mark is a disk set near the SW corner of a 1.52 m x 1.83 m (5.0 ft x 6.0 ft) concrete slab at the inshore end of the walkway to the U.S. Coast Guard Station, 24.69 m (81.0 ft) SE of a utility pole with light and electric meter, 17.53 m (57.5 ft) north of a 90o bend in the guard rail, 13.26 m (43.5 ft) west of the west wall of the U.S. Coast Guard boathouse, 10 m (33 ft) south of the SE corner of a green fuel storage tank, and 2.29 m (7.5 ft) SW of a lamp post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 7 Station ID: 9437540 PUBLICATION DATE: 04/21/2003 Name: GARIBALDI OREGON NOAA Chart: 18558 Latitude: 45° 33.3' N USGS Quad: NEHALEM Longitude: 123° 54.7' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: TIDAL 11 1970 DESIGNATION: 943 7540 TIDAL 11 MONUMENTATION: Tidal Station disk VM#: 8862 AGENCY: National Ocean Survey (NOS) PID: SETTING CLASSIFICATION: Concrete slab The bench mark is a disk set near the NW corner of a 7.47 m (24.5 ft) square concrete slab attached to the west wall of a fish cleaning building, near the NW corner of the boat basin, 38 m (124 ft) east of the west end of the boat basin extended, 11 m (35 ft) south of the centerline of an east/west blacktop road, 6.25 m (20.5 ft) north of utility pole #GA-A-48 L5-L1-SPL, 0.30 m (1.0 ft) south of a metal post supporting a roof, and 0.15 m (0.5 ft) east of the west edge and south of the north edge of the concrete slab. BENCH MARK STAMPING: TIDAL BM 12 1974 DESIGNATION: 943 7540 TIDAL 12 MONUMENTATION: Tidal Station disk VM#: 8863 AGENCY: National Ocean Survey (NOS) PID: SETTING CLASSIFICATION: Concrete wall The bench mark is a disk set vertically in the east wall of the Garibaldi Municipal Building, located at the SW corner of South Street and Acacia Avenue, 20.73 m (68.0 ft) south of the street corner, 0.61 m (2.0 ft) north of the door leading to the city offices, and 0.3 m (1 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 7 Station ID: 9437540 PUBLICATION DATE: 04/21/2003 Name: GARIBALDI OREGON NOAA Chart: 18558 Latitude: 45° 33.3' N USGS Quad: NEHALEM Longitude: 123° 54.7' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: TIDAL BM 7540 B 1978 DESIGNATION: 943 7540 TIDAL B MONUMENTATION: Tidal Station disk VM#: 8865 AGENCY: National Ocean Survey (NOS) PID: SETTING CLASSIFICATION: Concrete walkway The bench mark is a disk set in a 1.52 m (5.0 ft) wide walkway along South Commerial Drive at the corner of South Commerial Drive and South Mooring Drive, 24.69 m (81.0 ft) south of the SW corner of Joes Charter Cafe, 24 m (79 ft) east of the NE corner of the Bayside Restaurant, 22.86 m (75.0 ft) north of the breakwater, 10.67 m (35.0 ft) south of the centerline of South Commerial Drive, 1 m (3 ft) north of a fire hydrant, and 0.21 m (0.7 ft) north of the edge of the walkway. BENCH MARK STAMPING: NO 8 1957 MONUMENTATION: Tidal Station disk VM#: 16835 AGENCY: US Coast and Geodetic Survey (USC&GS) PID: SETTING CLASSIFICATION: Concrete curb The bench mark is a disk set in top of concrete curb at the SE corner of Municipal parking lot, 36.58 m (120.0 ft) south of the centerline of U.S. Highway 101, about 21.79 m (71.5 ft) west of the centerline of Large Street, 15.24 m (50.0 ft) north of the north rail of Southern Pacific main track and 8 m (26 ft) south of frame building, 5.49 m (18.0 ft) NNE of the NW corner of an old wood frame building that is next to the railroad tracks, and 0.61 m (2.0 ft) east of utility pole # GA-A-41-SP2.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 7 Station ID: 9437540 PUBLICATION DATE: 04/21/2003 Name: GARIBALDI OREGON NOAA Chart: 18558 Latitude: 45° 33.3' N USGS Quad: NEHALEM Longitude: 123° 54.7' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: TIDAL BM 13 1975 MONUMENTATION: Tidal Station disk VM#: 16836 AGENCY: National Ocean Survey (NOS) PID: SETTING CLASSIFICATION: Concrete pad The bench mark is a disk set flush in the SE corner of a 6.25 m x 15.24 m (20.5 ft x 50.0 ft) concrete pad supporting three oil tanks, 44.20 m (145.0 ft) south of the south railroad rail, 10.36 m (34.0 ft) west of the centerline of 7th Street, and 0.52 m (1.7 ft) NW of the SE corner.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 7 Station ID: 9437540 PUBLICATION DATE: 04/21/2003 Name: GARIBALDI OREGON NOAA Chart: 18558 Latitude: 45° 33.3' N USGS Quad: NEHALEM Longitude: 123° 54.7' W T I D A L D A T U M S Tidal datums at GARIBALDI based on: LENGTH OF SERIES: 9 Years TIME PERIOD: 1/1971-12/1978 ; 1-12/1980 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 9439040 ASTORIA, TONGUE POINT, COLUMBIA RIVER Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (02/07/1978) = 3.596 MEAN HIGHER HIGH WATER (MHHW) = 2.484 MEAN HIGH WATER (MHW) = 2.263 MEAN SEA LEVEL (MSL) = 1.346 MEAN TIDE LEVEL (MTL) = 1.333 MEAN LOW WATER (MLW) = 0.404 MEAN LOWER LOW WATER (MLLW) = 0.000 LOWEST OBSERVED WATER LEVEL (06/01/1973) = -0.882 National Geodetic Vertical Datum (NGVD 29) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW TIDAL BM 7540 A 1978 4.662 2.399 6 1927 4.301 2.038 NO 7 1957 4.632 2.369 TIDAL 10 1970 4.432 2.169 TIDAL 11 1970 4.786 2.523 TIDAL BM 12 1974 7.890 5.627 TIDAL BM 7540 B 1978 4.582 2.319 NO 8 1957 5.001 2.738 TIDAL BM 13 1975 4.957 2.694
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 7 Station ID: 9437540 PUBLICATION DATE: 04/21/2003 Name: GARIBALDI OREGON NOAA Chart: 18558 Latitude: 45° 33.3' N USGS Quad: NEHALEM Longitude: 123° 54.7' W 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 (NAVD 88). NGVD 29 is a fixed datum adopted as a national standard geodetic reference for heights but is now considered superseded. NGVD 29 is sometimes referred to as Sea Level Datum of 1929 or as Mean Sea Level on some early issues of Geological Survey Topographic Quads. NGVD 29 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 NGVD 29 are available from the National Geodetic Survey (NGS) data base via the World Wide Web at National Geodetic Survey. NAVD 88 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. NAVD 88 replaces NGVD 29 as the national standard geodetic reference for heights. Bench mark elevations relative to NAVD 88 are available from NGS through the World Wide Web at National Geodetic Survey. NGVD 29 and NAVD 88 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 NAVD 88 elevation is shown on the Elevations of Tidal Datums Table Referred to MLLW only when two or more of the bench marks listed have NAVD 88 elevations. The NAVD 88 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, NAVD 88 bench mark elevations computed indirectly from the tidal datums elevation table may differ slightly from NAVD 88 elevations listed for each bench mark in the NGS database.