U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 8 Station ID: 9438772 PUBLICATION DATE: 02/06/2014 Name: CATHCART LANDING, YOUNGS RIVER OR NOAA Chart: 18521 Latitude: 46° 7.5' N ( 46.12425) USGS Quad: OLNEY Longitude: 123° 48.3' W (-123.80433) The reach the station from the intersection of US Highway 101 and Oregon State Highway 202 (Nehalem Hwy) proceed east on Highway 202 for 7.7 km (4.8 mi) to the intersection with Haven View Drive, turn right on Haven View Drive and proceed S for 0.3 km (0.2 mi) to the end of the road at property 91340 Haven View Drive. The station is located at the private property dock. The benchmarks are located on the private property and north 0.5 km (0.2 mi) along Oregon State Highway 202. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 8772 A 2013 DESIGNATION: 943 8772 A MONUMENTATION: Tidal Station disk VM#: 20804 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Large round concrete cistern OPUS PID#: BBDC26 LATITUDE: 46° 7.5' N ( 46.12439) LONGITUDE: 123° 48.2' W (-123.80272) The bench mark is a disk set in the NW side of a round 9.0 M (29.5 FT) diameter by 2.45 M (8.0 FT) tall cement tank at the S end of the property, 21.82 M (71.6 FT) SSE of S corner of the red barn, 18.79 M (61.6 FT) SSE of the E corner of a 0.85 M (2.8 FT) tall foundation wall, 5.12 M (16.8 FT) SSW of the S corner of a galvanized corrugated barn and 1.09 M (3.6 FT) WSW of the W corner of NW drain grate which is 0.70 M (2.3 FT) by 1.07 M (3.5 FT) in size.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 8 Station ID: 9438772 PUBLICATION DATE: 02/06/2014 Name: CATHCART LANDING, YOUNGS RIVER OR NOAA Chart: 18521 Latitude: 46° 7.5' N ( 46.12425) USGS Quad: OLNEY Longitude: 123° 48.3' W (-123.80433) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 8772 B 2013 DESIGNATION: 943 8772 B MONUMENTATION: Tidal Station disk VM#: 20805 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete mat pad OPUS PID: LATITUDE: 46° 7.5' N ( 46.12472) LONGITUDE: 123° 48.2' W (-123.80328) The bench mark is a disk set in a concrete slab NW of a large galvanized shop building, 255.7 m (839 ft) SSW of bench mark T 193, 35.84 m (117.6 ft) SSE of the brick corner of the main residence, 21.62 m (70.9 ft) SSW of a power pole, 14.97 m (49.1 ft) NW of a center post of the large galvanized shop and 0.25 m (0.8 ft) SE of the NW corner of the slab.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 8 Station ID: 9438772 PUBLICATION DATE: 02/06/2014 Name: CATHCART LANDING, YOUNGS RIVER OR NOAA Chart: 18521 Latitude: 46° 7.5' N ( 46.12425) USGS Quad: OLNEY Longitude: 123° 48.3' W (-123.80433) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 79 T 193 1927 DESIGNATION: T 193 MONUMENTATION: Bench Mark disk VM#: 20806 AGENCY: Utility company IDB PID#: SC0636 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 46° 7.6' N ( 46.12689) LONGITUDE: 123° 48.1' W (-123.80208) The bench mark is a disk set in a concrete post, 255.7 m (839 ft) NNE of bench mark 943 8772 B, 13.74 m (45.1 ft) NNW of a utility pole numbered 147, 7.72 m (25.3 ft) NNE of the centerline of State Highway 202, 2.84 m (9.3 ft) WNW of the centerline of a driveway, 2.37 m (7.8 ft) E of a utility pole numbered 147A2 and about 0.09 m (0.3 ft) above the ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 8 Station ID: 9438772 PUBLICATION DATE: 02/06/2014 Name: CATHCART LANDING, YOUNGS RIVER OR NOAA Chart: 18521 Latitude: 46° 7.5' N ( 46.12425) USGS Quad: OLNEY Longitude: 123° 48.3' W (-123.80433) T I D A L B E N C H M A R K S BENCH MARK STAMPING: LEAHY 1935 23 DESIGNATION: LEAHY MONUMENTATION: Triangulation Station disk VM#: 20807 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: SC0633 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 46° 7.7' N ( 46.12828) LONGITUDE: 123° 48.4' W (-123.80708) The bench mark is a disk set in a concrete post on the S side of the road, 21.05 m (69.1 ft) W of bench mark LEAHY RM 1, 18.00 m (59.1 ft) SSE of a utility pole numbered 0809 334103, 10.32 m (33.9 ft) WSW of the centerline of Highway 202, 6.35 m (20.8 ft) WSW of the edge of the pavement, 0.55 m (1.8 ft) SSE of a witness post and set in the top of a 30-cm (12 inch) concrete post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 8 Station ID: 9438772 PUBLICATION DATE: 02/06/2014 Name: CATHCART LANDING, YOUNGS RIVER OR NOAA Chart: 18521 Latitude: 46° 7.5' N ( 46.12425) USGS Quad: OLNEY Longitude: 123° 48.3' W (-123.80433) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 2 1935 DESIGNATION: LEAHY RM 2 MONUMENTATION: Reference Mark disk VM#: 20808 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: SC0634 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 46° 7.7' N ( 46.12814) LONGITUDE: 123° 48.4' W (-123.80700) The bench mark is a disk set in a concrete post on the S side of the road, 23.74 m (77.9 ft) SW of bench mark LEAHY RM 1, 15.78 m (51.8 ft) WNW of a power pole numbered 0809 334102, 13.64 m (44.8 ft) SW of the centerline of Highway 202, 9.67 m (31.7 ft) SW of the edge of the pavement, 0.363 m (1.2 ft) NNE of a witness post and set in the top of a 30-cm (12 inch) square concrete post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 8 Station ID: 9438772 PUBLICATION DATE: 02/06/2014 Name: CATHCART LANDING, YOUNGS RIVER OR NOAA Chart: 18521 Latitude: 46° 7.5' N ( 46.12425) USGS Quad: OLNEY Longitude: 123° 48.3' W (-123.80433) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 1 1935 DESIGNATION: LEAHY RM 1 MONUMENTATION: Reference Mark disk VM#: 20809 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: SC0635 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 46° 7.7' N ( 46.12831) LONGITUDE: 123° 48.4' W (-123.80683) The bench mark is a disk set in a concrete post on the N side of the road. It is 40.16 m (131.8 ft) WNW of the NW corner of a shed at property 91195 Highway 202, 24.52 m (80.4 ft) N of a power pole numbered 0908 334102, 17.30 m (56.8 ft) SW of the edge of the lawn at property 91195 Highway 202, 8.15 m (26.7 ft) NE of the centerline of Highway 202, 6.54 m (21.5 ft) NE of edge of a bluff leading down to the road and about 4.05 m (13.3 ft) higher than the road.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 8 Station ID: 9438772 PUBLICATION DATE: 02/06/2014 Name: CATHCART LANDING, YOUNGS RIVER OR NOAA Chart: 18521 Latitude: 46° 7.5' N ( 46.12425) USGS Quad: OLNEY Longitude: 123° 48.3' W (-123.80433) T I D A L D A T U M S Tidal datums at CATHCART LANDING, YOUNGS RIVER based on: LENGTH OF SERIES: 4 MONTHS TIME PERIOD: June 2013 - September 2013 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: MEAN HIGHER HIGH WATER MHHW = 2.692 MEAN HIGH WATER MHW = 2.480 MEAN SEA LEVEL MSL = 1.418 MEAN TIDE LEVEL MTL = 1.415 MEAN LOW WATER MLW = 0.349 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum NAVD88 = -0.021 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 8772 A 2013 10.650 8.170 8772 B 2013 11.614 9.134 79 T 193 1927 25.561 23.081 LEAHY 1935 23 8.184 5.704 NO 2 1935 8.881 6.401 NO 1 1935 11.321 8.841
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 8 of 8 Station ID: 9438772 PUBLICATION DATE: 02/06/2014 Name: CATHCART LANDING, YOUNGS RIVER OR NOAA Chart: 18521 Latitude: 46° 7.5' N ( 46.12425) USGS Quad: OLNEY Longitude: 123° 48.3' W (-123.80433) 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.