U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8720059 PUBLICATION DATE: 08/19/2011 Name: MELTON NELSON MEM PK, VAUGHNS LDG FL NOAA Chart: 11488 Latitude: 30° 37.8' N ( 30.63000) USGS Quad: AMELIA ISLAND Longitude: 81° 34.6' W ( -81.57670) To reach from the intersection of Interstate 95 and SR 200/A1A proceed east 7.9 km (4.9 mi) to Melton Nelson Park on the right just past the bridge crossing Lofton Creek. The bench marks are located in the vicinity. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 0059 A 2008 DESIGNATION: 872 0059 A MONUMENTATION: Tidal Station disk VM#: 18641 AGENCY: National Ocean Survey/Service (NOS) IDB PID#: SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: BBFC47 LATITUDE: 30° 37.7' N ( 30.62908) LONGITUDE: 81° 34.2' W ( -81.57075) The primary bench mark is a disk located on the Melton Nelson Park property,13.10 m (42.98 ft) NW of a 0.5 m diameter palm tree, 8.92 m (29.27 ft) south of the centerline of the ramp, 8.72m (28.61 ft) ESE of the creek bulkhead on south side of the ramp, 3 m (9.8 ft) east of bench mark 872 0059 E, 2.74 m (8.99 ft) NNW of a carsonite witness post. The bench mark is recessed below ground, crimped to a stainless steel rod driven 14.1 m (46.2 ft) to refusal.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 8720059 PUBLICATION DATE: 08/19/2011 Name: MELTON NELSON MEM PK, VAUGHNS LDG FL NOAA Chart: 11488 Latitude: 30° 37.8' N ( 30.63000) USGS Quad: AMELIA ISLAND Longitude: 81° 34.6' W ( -81.57670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 0059 B 2008 DESIGNATION: 872 0059 B MONUMENTATION: Tidal Station disk VM#: 18642 AGENCY: National Ocean Survey/Service (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete monument OPUS PID#: BBFC44 LATITUDE: 30° 37.8' N ( 30.62919) LONGITUDE: 81° 34.2' W ( -81.57075) The bench mark is a disk set flush with the concrete, 26.10 m (85.63 ft) SSW of a 1.2 m (3.94 ft) tall concrete Southern Bell telephone monument, 15.15 m (49.70 ft) SW of a power pole, 6.92 m (22.70 ft) SSE of 0.5 m (1.6 ft) diameter palm tree, 1.86 m (6.10 ft) NNE of a light post, 1.92 m (6.30 ft) NE of a carsonite witness post. BENCH MARK STAMPING: 0059 C 2008 DESIGNATION: 872 0059 C MONUMENTATION: Tidal Station disk VM#: 18643 AGENCY: National Ocean Survey/Service (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete monument OPUS PID#: BBFC43 LATITUDE: 30° 37.8' N ( 30.62925) LONGITUDE: 81° 34.2' W ( -81.57078) The bench mark is a disk set flush with the concrete, 12.8m (41.98 ft) ESE of Lofton creek bulkhead on the north side of the ramp, 8.76 m (28.74 ft) NW of a light pole, 3.37 m (11.06 ft) west of a 0.5 m diameter palm tree.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 8720059 PUBLICATION DATE: 08/19/2011 Name: MELTON NELSON MEM PK, VAUGHNS LDG FL NOAA Chart: 11488 Latitude: 30° 37.8' N ( 30.63000) USGS Quad: AMELIA ISLAND Longitude: 81° 34.6' W ( -81.57670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 0059 D 2008 DESIGNATION: 872 0059 D MONUMENTATION: Tidal Station disk VM#: 18644 AGENCY: National Ocean Survey/Service (NOS) IDB PID#: SETTING CLASSIFICATION: Bridge support OPUS PID: LATITUDE: 30° 37.8' N ( 30.62931) LONGITUDE: 81° 34.2' W ( -81.57081) The bench mark is a disc set flush in the concrete support of the bridge crossing Lofton Creek, 19.95 m (65.45 ft) NE of 0.5 m (1.6 ft) diameter palm tree on the north side of the ramp, 10.04 m (32.94 ft) ESE of the Lofton Creek bulkhead on the north side of the ramp, 1.44 m (4.72 ft) down from the top surface of the bridge railing on the southern side of the east bound traffic lane. BENCH MARK STAMPING: 872 0059 E 2008 DESIGNATION: 872 0059 E MONUMENTATION: Tidal Station disk VM#: 18645 AGENCY: NOS IDB PID#: SETTING CLASSIFICATION: Concrete monument OPUS PID#: BBFC42 LATITUDE: 30° 37.7' N ( 30.62908) LONGITUDE: 81° 34.2' W ( -81.57078) The bench mark is a disk set flush with the concrete, 14.31 m (46.95 ft) south of a light post number 1440707842, 11.81 m (38.75 ft) ESE of the Lofton Creek bulkhead on the south side of the ramp, 11.22 m (36.81 ft) NNW of a 0.5 diameter palm tree on the south side of the ramp, 3 m (9.8 ft) west of bench mark 872 0059 A, 2.31 m (7.58 ft) NE of a carsonite witness post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8720059 PUBLICATION DATE: 08/19/2011 Name: MELTON NELSON MEM PK, VAUGHNS LDG FL NOAA Chart: 11488 Latitude: 30° 37.8' N ( 30.63000) USGS Quad: AMELIA ISLAND Longitude: 81° 34.6' W ( -81.57670) T I D A L D A T U M S Tidal datums at MELTON NELSON MEM PK, VAUGHNS LDG based on: LENGTH OF SERIES: 2 YEARS TIME PERIOD: Sept. 2008 - Aug. 2009 and Feb. 2010 - Jan. 2011 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8720030 FERNANDINA BEACH, AMELIA RIVER Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (05/21/2009) = 1.397 MEAN HIGHER HIGH WATER MHHW = 0.915 MEAN HIGH WATER MHW = 0.884 MEAN SEA LEVEL MSL = 0.558 MEAN TIDE LEVEL MTL = 0.484 MEAN LOW WATER MLW = 0.084 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (02/14/2011) = -0.731 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 0059 A 2008 1.388 0.504 0059 B 2008 1.517 0.633 0059 C 2008 1.478 0.594 0059 D 2008 3.568 2.684 872 0059 E 2008 1.437 0.553
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8720059 PUBLICATION DATE: 08/19/2011 Name: MELTON NELSON MEM PK, VAUGHNS LDG FL NOAA Chart: 11488 Latitude: 30° 37.8' N ( 30.63000) USGS Quad: AMELIA ISLAND Longitude: 81° 34.6' W ( -81.57670) 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.