U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 6 Station ID: 8727097 PUBLICATION DATE: 04/19/2005 Name: ARIPEKA FL NOAA Chart: 11409 Latitude: 28° 26.0' N ( 28.43330) USGS Quad: ARIPEKA Longitude: 82° 40.1' W ( -82.66830) To reach the tidal bench marks from the intersection of U.S. Highway 19 and County Road C-595 SE of Aripeka, proceed west on County Road C-595 for 3.4 km (2.1 mi) to Hammond Creek Bridge (Number 14). The bench marks are located in the area around the bridge. The tide gage and staff were located on the bridge. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 7097 A 1977 DESIGNATION: 872 7097 A TIDAL MONUMENTATION: Tidal Station disk VM#: 7731 AGENCY: National Ocean Survey (NOS) IDB PID#: AL7338 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 28° 26.0' N ( 28.43330) LONGITUDE: 82° 40.1' W ( -82.66830) The bench mark is a disk crimped to a copper-coated steel rod, located 5 m (18 ft) west of the centerline of State Road 595, 4 m (12 ft) SE of a palm tree, 1 m (4 ft) north of a fence, 1 m (3 ft) NW of power pole number 14266OR and 1 m (3 ft) NW of a witness post. The bench mark is level with the ground, crimped to a copper-coated steel rod driven 3 m (10 ft) to refusal and encased in PVC pipe and a concrete kickblock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 6 Station ID: 8727097 PUBLICATION DATE: 04/19/2005 Name: ARIPEKA FL NOAA Chart: 11409 Latitude: 28° 26.0' N ( 28.43330) USGS Quad: ARIPEKA Longitude: 82° 40.1' W ( -82.66830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 7097 B 1977 DESIGNATION: 872 7097 B TIDAL MONUMENTATION: Tidal Station disk VM#: 7732 AGENCY: National Ocean Survey (NOS) IDB PID#: AL7337 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 28° 26.1' N ( 28.43500) LONGITUDE: 82° 40.0' W ( -82.66670) The primary bench mark is a disk set in the top of a concrete monument, 12.04 m (39.5 ft) SSW of telephone pole #R3082, 8.93 m (29.3 ft) west of a concrete fence, 8.23 m (27.0 ft) south of the centerline of Sunset Drive, 4.48 m (14.7 ft) west of the centerline of County Road C-595, 0.30 m (1.0 ft) east of a witness post, and 0.06 m (0.2 ft) below ground level. BENCH MARK STAMPING: 7097 C DESIGNATION: 872 7097 C TIDAL MONUMENTATION: Tidal Station disk VM#: 7733 AGENCY: National Ocean Survey (NOS) IDB PID#: AL7336 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 28° 26.2' N ( 28.43670) LONGITUDE: 82° 39.9' W ( -82.66500) The bench mark is a disk set in the top of a concrete monument, 15 m (49 ft) ENE of the north end post of a board post, 6 m (19 ft) east of the centerline of County Road C-595, 5.94 m (19.5 ft) south of a powerline pole, 0.61 m (2 ft) west of a witness post, and 0.12 m (0.4 ft) below ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 6 Station ID: 8727097 PUBLICATION DATE: 04/19/2005 Name: ARIPEKA FL NOAA Chart: 11409 Latitude: 28° 26.0' N ( 28.43330) USGS Quad: ARIPEKA Longitude: 82° 40.1' W ( -82.66830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: SMITH NO 2 1934 DESIGNATION: SMITH RM 2 MONUMENTATION: Reference Mark disk VM#: 7734 AGENCY: U.S. Coastal & Geodetic Survey (USC&GS) IDB PID#: AL7343 SETTING CLASSIFICATION: Concrete post OPUS PID: LATITUDE: 28° 26.0' N ( 28.43330) LONGITUDE: 82° 40.1' W ( -82.66830) The bench mark is a disk set in the top of a concrete post, 21 m (69 ft) south of a post for a playground, 11 m (37 ft) NE of the south end of a sea wall, 8 m (27 ft) east of a sea wall and 0.30 m (1.0 ft) from a witness post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 6 Station ID: 8727097 PUBLICATION DATE: 04/19/2005 Name: ARIPEKA FL NOAA Chart: 11409 Latitude: 28° 26.0' N ( 28.43330) USGS Quad: ARIPEKA Longitude: 82° 40.1' W ( -82.66830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: SMITH NO 3 1934 DESIGNATION: SMITH RM 3 MONUMENTATION: Reference Mark disk VM#: 7735 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: AL7342 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 28° 26.1' N ( 28.43500) LONGITUDE: 82° 40.0' W ( -82.66670) The bench mark is a disk set in the top of a concrete monument, 11 m (37 ft) north of a driveway, 11 m (36 ft) west of the centerline of County Road C-595, 6 m (21 ft) west of a picket fence, 3 m (9 ft) north of a palm tree, 0.3 m (1 ft) east from a witness post, and 0.30 m (1.0 ft) from a witness post, and 0.09 m (0.3 ft) above ground level. NOTE: Mark not found in 1994 by US Power Squadron.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 6 Station ID: 8727097 PUBLICATION DATE: 04/19/2005 Name: ARIPEKA FL NOAA Chart: 11409 Latitude: 28° 26.0' N ( 28.43330) USGS Quad: ARIPEKA Longitude: 82° 40.1' W ( -82.66830) T I D A L D A T U M S Tidal datums at ARIPEKA based on: LENGTH OF SERIES: 8 MONTHS TIME PERIOD: January 1978 - August 1978 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8727520 CEDAR KEY, GULF OF MEXICO Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 0.967 MEAN HIGH WATER MHW = 0.851 North American Vertical Datum NAVD88 = 0.552 MEAN TIDE LEVEL MTL = 0.484 MEAN SEA LEVEL MSL = 0.456 MEAN LOW WATER MLW = 0.117 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 7097 A 1977 1.621 0.770 7097 B 1977 1.440 0.589 7097 C 1.273 0.422 SMITH NO 2 1934 1.293 0.442 SMITH NO 3 1934 1.313 0.462
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 6 Station ID: 8727097 PUBLICATION DATE: 04/19/2005 Name: ARIPEKA FL NOAA Chart: 11409 Latitude: 28° 26.0' N ( 28.43330) USGS Quad: ARIPEKA Longitude: 82° 40.1' W ( -82.66830) 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.