U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 PUBLICATION DATE: 02/04/1993 Station ID: 9440875 SUPERCEDED DATE: 04/21/2003 Name: SOUTH BEND, WILLAPA RIVER WASHINGTON NOAA Chart: 18504 Latitude: 46° 39.8' N USGS Quad: SOUTH BEND Longitude: 123° 47.9' W To reach the tidal bench marks from the intersection of Kendrick Street and Robert Bush Drive (U.S. Highway 101) in South Bend, proceed SW on Robert Bush Drive for 0.25 mile (0.40 km) to Peterson and Sons Seafoods, Inc. processing plant on the north side of Robert Bush Drive. The bench marks are along Robert Bush Drive and Kendrick Street. The tide gage and staff were on the wharf on the north side of the processing plant. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 0875A 1982 MONUMENTATION: Survey Disk VM#: 8966 AGENCY: PID#: SC0954 SETTING CLASSIFICATION: Concrete Foundation The primary bench mark is set in the NE corner of a raised ledge along the north face of the concrete foundation for Buds Lumber Company single story wood building, 44 feet (13 m) south of the centerline of Robert Bush Drive (U.S. Highway 101), 2.4 feet (0.7 m) south of the north edge of the ledge, 0.6 foot (0.2 m) north of the north face of Buds Lumber Company building, and 0.6 foot (0.2 m) west of the east edge of the ledge. BENCH MARK STAMPING: 0875B 1982 MONUMENTATION: Survey Disk VM#: 8967 AGENCY: PID#: SC0956 SETTING CLASSIFICATION: Concrete Foundation The bench mark is set in the NE corner of a concrete footing for the steps to Gavel Lodge, 73 feet (22 m) south of the centerline of Robert Bush Drive (U.S. Highway 101), 15 feet (5 m) north of the north face of the building, 5.6 feet (1.7 m) north of the south face of a 3.5 X 6 X 4-foot (1.1 X 2 X 1 m) brick planter, and 3.7 feet (1.1 m) east of the east edge of the steps.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 PUBLICATION DATE: 02/04/1993 Station ID: 9440875 SUPERCEDED DATE: 04/21/2003 Name: SOUTH BEND, WILLAPA RIVER WASHINGTON NOAA Chart: 18504 Latitude: 46° 39.8' N USGS Quad: SOUTH BEND Longitude: 123° 47.9' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: 0875C 1982 MONUMENTATION: Survey Disk VM#: 8968 AGENCY: PID#: SC0957 SETTING CLASSIFICATION: Concrete Door Sill The bench mark is set in an abandoned concrete door sill NW of Gavel Lodge and near an old abandoned brick wall, 77.5 feet (23.6 m) NW of the NW corner of the concrete footing for the brick planter west of the entrance stairs to Gavel Lodge, 71.5 feet (21.8 m) north of the NW corner of Gavel Lodge, 41.5 feet (12.6 m) south of the centerline of Robert Bush Drive (U.S. Highway 101), 4 feet (1 m) west of a 1.5-foot (0.5 m) square brick column, and 1 foot (0.3 m) east of the old 14 foot (4 m) brick wall. BENCH MARK STAMPING: 0875D 1982 MONUMENTATION: Survey Disk VM#: 8969 AGENCY: PID#: SC0955 SETTING CLASSIFICATION: Concrete Retaining Wall The bench mark is set in the NE corner of the retaining wall for a concrete planter at the Country Bowl single story wood frame building, 76.5 feet (23.3 m) south of the centerline of Robert Bush Drive (U.S. Highway 101), 2.2 feet (0.7 m) west of the west facing corner of the building entrance, and 1.6 feet (0.5 m) north of the north face of the building.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 PUBLICATION DATE: 02/04/1993 Station ID: 9440875 SUPERCEDED DATE: 04/21/2003 Name: SOUTH BEND, WILLAPA RIVER WASHINGTON NOAA Chart: 18504 Latitude: 46° 39.8' N USGS Quad: SOUTH BEND Longitude: 123° 47.9' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: 0875E 1982 MONUMENTATION: Survey Disk VM#: 8970 AGENCY: PID#: SC0953 SETTING CLASSIFICATION: Concrete Foundation The bench mark is set vertically in the north face of St. Lawrences Church, 88 feet (27 m) north of the centerline of First Street, 64 feet (20 m) west of the centerline of Kendrick Street, 9 feet (3 m) west of the NE corner of the church, and 1 foot (0.3 m) above the ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 PUBLICATION DATE: 02/04/1993 Station ID: 9440875 SUPERCEDED DATE: 04/21/2003 Name: SOUTH BEND, WILLAPA RIVER WASHINGTON NOAA Chart: 18504 Latitude: 46° 39.8' N USGS Quad: SOUTH BEND Longitude: 123° 47.9' W T I D A L D A T U M S Tidal datums at SOUTH BEND, WILLAPA RIVER based on: LENGTH OF SERIES: 128 HIGHS, 127 LOWS TIME PERIOD: May 15 - July 19, 1982 TIDAL EPOCH: 1960-1978 CONTROL TIDE STATION: 9440910 TOKE POINT Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET: HIGHEST OBSERVED WATER LEVEL (06/21/1982) = 11.17 MEAN HIGHER HIGH WATER MHHW = 9.72 MEAN HIGH WATER MHW = 9.02 MEAN TIDE LEVEL MTL = 5.21 MEAN LOW WATER MLW = 1.40 LOWEST OBSERVED WATER LEVEL (05/24/1982) = -3.93 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In FEET above: Stamping or Designation MLLW MHW 0875A 1982 15.62 6.60 0875B 1982 24.79 15.77 0875C 1982 25.69 16.67 0875D 1982 15.85 6.83 0875E 1982 14.60 5.58
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 PUBLICATION DATE: 02/04/1993 Station ID: 9440875 SUPERCEDED DATE: 04/21/2003 Name: SOUTH BEND, WILLAPA RIVER WASHINGTON NOAA Chart: 18504 Latitude: 46° 39.8' N USGS Quad: SOUTH BEND Longitude: 123° 47.9' 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 (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 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.