U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 9 Station ID: 9433501 PUBLICATION DATE: 03/07/2018 Name: REEDSPORT OR NOAA Chart: 18584 Latitude: 43° 42.3' N ( 43.70500) USGS Quad: REEDSPORT Longitude: 124° 5.7' W (-124.09500) To reach the bench marks from the intersection of US highway 101 and State Highway 38 (Umpqua Avenue) in Reedsport, proceed southeast on Umpqua Avenue southeast for 0.9 km (0.6 mi) to Riverfront Way, take a sharp left and proceed 0.3 km (0.2 mi) to the entrance to the Umpqua Discovery Center. The bench marks are located at the Discovery Center, along Riverfront Way and along US Highway 101, the tide gauge is located on the Discovery Center dock. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 3501 A 2017 DESIGNATION: 943 3501 A MONUMENTATION: Tidal Station disk VM#: 22285 AGENCY: NOS IDB PID#: SETTING CLASSIFICATION: Floodwall OPUS PID#: BBFP75 LATITUDE: 43° 42.2' N ( 43.70358) LONGITUDE: 124° 5.7' W (-124.09425) The primary bench mark is a disk set in a floodwall, 28.81 m (94.5 ft) south of the southwest corner of a warehouse building, 25.87 m (84.9 ft) SE of west end of floodwall at Gate 4, 18.57 m (60.9 ft) SSE of a stop sign at the corner of Water and River Front Way, 2.92 m (9.6 ft) SE of concrete floodwall break, 0.52 m (1.7 ft) WSE of edge of pavement of River Front Way and 0.6 m (2.0 ft) above grade.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 9 Station ID: 9433501 PUBLICATION DATE: 03/07/2018 Name: REEDSPORT OR NOAA Chart: 18584 Latitude: 43° 42.3' N ( 43.70500) USGS Quad: REEDSPORT Longitude: 124° 5.7' W (-124.09500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: RAMP 1973 DESIGNATION: RAMP MONUMENTATION: Bench Mark disk VM#: 22286 AGENCY: USACE IDB PID#: SETTING CLASSIFICATION: Boat ramp OPUS PID: LATITUDE: 43° 42.3' N ( 43.70464) LONGITUDE: 124° 5.7' W (-124.09469) The bench mark is a disk set in a concrete boat launch ramp, 26.55 m (87.1 ft) east of the NE corner of a restaurant building, 12.00 m (39.4 ft) ESE of a wood sculpture of Steve Hanson holding a sturgeon, 6.16 m (20.2 ft) NNE of 30 mc (12 inch) diameter sewer drain, 3.26 m (10.7 ft) SSW of utility pole 118916, and 0.30 m (1.0 ft) northeast of the southwest corner of the ramp.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 9 Station ID: 9433501 PUBLICATION DATE: 03/07/2018 Name: REEDSPORT OR NOAA Chart: 18584 Latitude: 43° 42.3' N ( 43.70500) USGS Quad: REEDSPORT Longitude: 124° 5.7' W (-124.09500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: PATRICK 1998 DESIGNATION: PATRICK MONUMENTATION: Bench Mark disk VM#: 22287 AGENCY: Douglas County Oregon IDB PID#: SETTING CLASSIFICATION: Curb OPUS PID: LATITUDE: 43° 42.3' N ( 43.70519) LONGITUDE: 124° 5.7' W (-124.09558) The bench mark is a disk set in a curb, 46.42 m (152.3 ft) NE of the centerline of river front street, 14.64 m (48.0 ft) WNW of northwest building corner of the discovery center, 7.60 m (24.9 ft) north of utility pole number 118935, 4.49 m (14.7 ft) ESE of southeast building corner of the Schooner Cafe, and 0.80 m (2.6 ft) WNW of the edge of the curb at a crack.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 9 Station ID: 9433501 PUBLICATION DATE: 03/07/2018 Name: REEDSPORT OR NOAA Chart: 18584 Latitude: 43° 42.3' N ( 43.70500) USGS Quad: REEDSPORT Longitude: 124° 5.7' W (-124.09500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: REED 1989 DESIGNATION: REED MONUMENTATION: Survey disk VM#: 22288 AGENCY: Oregon Dept of Transportaiton IDB PID#: OA1622 SETTING CLASSIFICATION: Curb OPUS PID: LATITUDE: 43° 42.2' N ( 43.70314) LONGITUDE: 124° 5.3' W (-124.08789) The bench mark is a disk set in a concrete monument near the east end of a triangle shaped traffic island, 53.23 m (174.6 ft) SE of utility pole at the SW corner of the intersection of US Highway 101 and Umpqua avenue, 10.14 m (33.3 ft) SSW of the centerline of highway 38, 6.43 m (21.1 ft) SE of reference monument on north curb of Highway 38, 4.66 m (15.3 ft) NNE of reference monument on south curb of Highway 38 entrance ramp and 1.70 m (5.6 ft) north of a stop sign.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 9 Station ID: 9433501 PUBLICATION DATE: 03/07/2018 Name: REEDSPORT OR NOAA Chart: 18584 Latitude: 43° 42.3' N ( 43.70500) USGS Quad: REEDSPORT Longitude: 124° 5.7' W (-124.09500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: G 755 1988 DESIGNATION: G 755 MONUMENTATION: Flange-encased Rod VM#: 22289 AGENCY: NOS IDB PID#: OA0683 SETTING CLASSIFICATION: Stainless steel rod without sleeve OPUS PID: LATITUDE: 43° 42.1' N ( 43.70133) LONGITUDE: 124° 6.4' W (-124.10744) The bench mark is a flange encased rod set at the southwest corner of the intersection between US Highway 101 and 11th St, 21.40 m (70.2 ft) SE of the centerline of US Highway 101, 9.95 m (32.6 ft) NE of the GTE manhole cover on sidewalk of US Highway 101, 1.56 m (5.1 ft) south of 11th St edge of pavement, 0.90 m (3.0 ft) east of a utility pole numbered 119185, and 0.28 m (0.9 ft) north of an Oregon Department of Transportation witness post. The datum point is set 2 cm (1 inch) below grade being the top of a stainless steel rod encased in a 5-inch National Geodetic Survey logo cap.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 9 Station ID: 9433501 PUBLICATION DATE: 03/07/2018 Name: REEDSPORT OR NOAA Chart: 18584 Latitude: 43° 42.3' N ( 43.70500) USGS Quad: REEDSPORT Longitude: 124° 5.7' W (-124.09500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NORTH BASE 1 22 1934 DESIGNATION: NORTH BASE 1 MONUMENTATION: Bench Mark disk VM#: 22290 AGENCY: Oregon Highway Department IDB PID#: OA0326 SETTING CLASSIFICATION: Abutment OPUS PID: LATITUDE: 43° 42.4' N ( 43.70625) LONGITUDE: 124° 5.8' W (-124.09714) The bench mark is a disk set in the west sidewall of the bridge over the Umpqua river, 18.72 m (61.4 ft) NE of south end of a walkway, 1.34 m (4.4 ft) NW of the centerline of west track, 0.85 m (2.8 ft) SE of west side wall end and 0.20 m (0.7 ft) below the top of tracks.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 9 Station ID: 9433501 PUBLICATION DATE: 03/07/2018 Name: REEDSPORT OR NOAA Chart: 18584 Latitude: 43° 42.3' N ( 43.70500) USGS Quad: REEDSPORT Longitude: 124° 5.7' W (-124.09500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: B 56 1930 DESIGNATION: B 56 MONUMENTATION: Bench Mark disk VM#: 22291 AGENCY: CGS IDB PID#: OA0324 SETTING CLASSIFICATION: Abutment OPUS PID: LATITUDE: 43° 42.4' N ( 43.70625) LONGITUDE: 124° 5.8' W (-124.09711) The bench mark is a disk set in the south bridge wing wall abutment of a the rail bridge crossing the Umpqua river, 18.9 m (62.0 ft) NE of the end of walkway, 3.10 m (10.2 ft) SE of east rail, 0.18 m (0.6 ft) NW of bench mark 45.003 and 1.89 m (6.2 ft) below the bridge walkway decking. BENCH MARK STAMPING: 45.003 DESIGNATION: 45.003 MONUMENTATION: Bolt VM#: 22292 AGENCY: IDB PID#: OA0325 SETTING CLASSIFICATION: Abutment OPUS PID: LATITUDE: 43° 42.4' N ( 43.70619) LONGITUDE: 124° 5.8' W (-124.09708) The bench mark is a bolt set in the south bridge wing wall abutment of the rail bridge crossing the Umpqua river, 18.9 m (62.0 ft) NE of end of walkway, 3.42 m (11.2 ft) SSE of southeast rail, 0.32 m (1.0 ft) SSE of bench mark B56 and 1.89 m (6.2 ft) below the bridge walkway decking.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 8 of 9 Station ID: 9433501 PUBLICATION DATE: 03/07/2018 Name: REEDSPORT OR NOAA Chart: 18584 Latitude: 43° 42.3' N ( 43.70500) USGS Quad: REEDSPORT Longitude: 124° 5.7' W (-124.09500) T I D A L D A T U M S Tidal datums at REEDSPORT based on: LENGTH OF SERIES: 5 MONTHS TIME PERIOD: May 2017 - September 2017 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 = 2.262 MEAN HIGH WATER MHW = 2.062 MEAN SEA LEVEL MSL = 1.204 MEAN TIDE LEVEL MTL = 1.201 MEAN LOW WATER MLW = 0.340 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum NAVD88 = -0.022 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 3501 A 2017 5.724 3.662 RAMP 1973 3.459 1.397 PATRICK 1998 4.384 2.322 REED 1989 3.503 1.441 G 755 1988 3.392 1.330 NORTH BASE 1 22 1934 7.942 5.880 B 56 1930 6.042 3.980 45.003 6.024 3.962 Foot Notes: Bench marks 45.003, B 56 1930 and North Base 1 22 1934 are based on one differential leveling connection and do not meet the quality control standards of the NOS. Therefore, caution should be used when deriving elevations for these marks.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 9 of 9 Station ID: 9433501 PUBLICATION DATE: 03/07/2018 Name: REEDSPORT OR NOAA Chart: 18584 Latitude: 43° 42.3' N ( 43.70500) USGS Quad: REEDSPORT Longitude: 124° 5.7' W (-124.09500) 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.