Bench Mark Sheet for 8725685, CUTOFF SOUTH FL
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Published Bench Mark Sheet for 8725685 CUTOFF SOUTH FL
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 7 Station ID: 8725685 PUBLICATION DATE: 04/27/2012 Name: CUTOFF SOUTH FL NOAA Chart: 11426 Latitude: 26° 51.3' N ( 26.85500) USGS Quad: PLACIDA Longitude: 82° 18.2' W ( -82.30330) To reach the tidal bench marks at the southern end of Lemon Bay, proceed 10.5 km (6.5 mi) south along State Road 775 (Alternate 45) from Englewood, to a dirt road, continue west on the dirt road to the end and the Born residence. The gage site was at the wood pier and the bench marks are in the near area. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 5685 A 1977 DESIGNATION: 872 5685 A MONUMENTATION: Tidal Station disk VM#: 7384 AGENCY: National Ocean Survey (NOS) IDB PID#: AG7811 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 26° 51.4' N ( 26.85600) LONGITUDE: 82° 18.2' W ( -82.30286) The primary bench mark is a disk located 6 m (20 ft) SW of the SW corner of a porch attached to the dwelling, 4.27 m (14.0 ft) NNW of the end of the dock and 1.52 m (5.0 ft) NE of the shoreline. The bench mark is crimped to a 5/8 inch diameter copper-coated steel rod driven 7.32 m (24.0 ft) and encased in a PVC protector pipe and concrete.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 7 Station ID: 8725685 PUBLICATION DATE: 04/27/2012 Name: CUTOFF SOUTH FL NOAA Chart: 11426 Latitude: 26° 51.3' N ( 26.85500) USGS Quad: PLACIDA Longitude: 82° 18.2' W ( -82.30330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5685 B 1977 DESIGNATION: 872 5685 B MONUMENTATION: Tidal Station disk VM#: 7385 AGENCY: National Ocean Survey (NOS) IDB PID#: AG7807 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 26° 51.4' N ( 26.85600) LONGITUDE: 82° 18.2' W ( -82.30286) The bench mark is a disk located 19 m (62 ft) WSW of the SW corner of the dwelling, 18.29 m (60.0 ft) NW of Bench Mark 5685 A 1977, 3 m (10 ft) NE of the shoreline and 0.15 m (0.5 ft) north of a witness post. The bench mark is crimped to a 5/8 inch copper-coated steel rod driven 7.32 m (24.0 ft) and encased in a PVC protector pipe and concrete. BENCH MARK STAMPING: 5685 E 1977 DESIGNATION: 872 5685 E MONUMENTATION: Tidal Station disk VM#: 7387 AGENCY: National Ocean Survey (NOS) IDB PID#: AG7808 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 26° 51.4' N ( 26.85631) LONGITUDE: 82° 18.2' W ( -82.30311) The bench mark is a disk located 20 m (66 ft) WSW of Bench Mark 5685 C 1977, 17 m (56 ft) NNW of Bench Mark 5685 B 1977, 2.44 m (8.0 ft) north of the shoreline and 0.15 m (0.5 ft) north of a witness post. The bench mark is crimped to a 5/8 inch copper-coated steel rod driven 7.32 m (24.0 ft) and encased in a PVC protector pipe and concrete.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 7 Station ID: 8725685 PUBLICATION DATE: 04/27/2012 Name: CUTOFF SOUTH FL NOAA Chart: 11426 Latitude: 26° 51.3' N ( 26.85500) USGS Quad: PLACIDA Longitude: 82° 18.2' W ( -82.30330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5685 G 2008 DESIGNATION: 872 5685 G MONUMENTATION: Flange-encased Rod VM#: 19973 AGENCY: National Geodetic Survey (NGS)C IDB PID#: DM3213 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID#: DM3213 LATITUDE: 26° 51.4' N ( 26.85589) LONGITUDE: 82° 18.2' W ( -82.30264) The bench mark is a flange encased rod located 25.7 m (84.3 ft) south of a fishing pier, 21.9 m (71.8 ft) south of a wooden state park sign, 21.5 m (70.6 ft) SE of the approximate centerline of the Don Pedro State Park entrance road, and 0.8 m (2.6 ft) north of a carsonite witness post. BENCH MARK STAMPING: 5685 H 2008 DESIGNATION: 872 5685 H MONUMENTATION: Tidal Station disk VM#: 19974 AGENCY: Florida Dept. of Environmental Protection (FLDEP) IDB PID#: DM3212 SETTING CLASSIFICATION: Concrete pavement OPUS PID: LATITUDE: 26° 51.4' N ( 26.85736) LONGITUDE: 82° 18.0' W ( -82.30064) The bench mark is a disk located 16.4 m (53.7 ft) west of the SW corner of a restroom building, 15.8 m (51.7 ft) north of the Don Pedro State Park entrance road, 2.5 m (8.2 ft) east of a carsonite witness post, 0.4 m (1.3 ft) SW of the SW column of the picnic shelter, and 0.3 m (0.9 ft) NE of the SW corner of the concrete slab.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 7 Station ID: 8725685 PUBLICATION DATE: 04/27/2012 Name: CUTOFF SOUTH FL NOAA Chart: 11426 Latitude: 26° 51.3' N ( 26.85500) USGS Quad: PLACIDA Longitude: 82° 18.2' W ( -82.30330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: CHA 11 1983 DESIGNATION: CHA 11 MONUMENTATION: Survey disk VM#: 19975 AGENCY: Florida Dept. of Environmental Protection (FLDEP) IDB PID#: SETTING CLASSIFICATION: Concrete culvert headwall OPUS PID: LATITUDE: 26° 51.9' N ( 26.86500) LONGITUDE: 82° 18.0' W ( -82.30064) The bench mark is a disk set in the center of a culvert headwall, bearing 8.44 m (27.7 ft) east-NE of the centerline of State Road 775, 123 feet north-NW of the extended centerline of a private drive, 32.98 m (108.2 ft) NW of power pole 5-3033-1195-07, and 0.82 m (2.7 ft) SSE of a witness post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 7 Station ID: 8725685 PUBLICATION DATE: 04/27/2012 Name: CUTOFF SOUTH FL NOAA Chart: 11426 Latitude: 26° 51.3' N ( 26.85500) USGS Quad: PLACIDA Longitude: 82° 18.2' W ( -82.30330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: CHA 12 1983 DESIGNATION: CHA 12 MONUMENTATION: Survey disk VM#: 19976 AGENCY: Florida Dept. of Environmental Protection (FLDEP) IDB PID#: SETTING CLASSIFICATION: Concrete culvert headwall OPUS PID: LATITUDE: 26° 51.5' N ( 26.85753) LONGITUDE: 82° 17.8' W ( -82.29717) The bench mark is a disk set in the top center of a culvert headwall, bearing 13.11 m (43 ft) SW of the centerline of the road, 19.84 m (65.1 ft) SE of telephone box 392, 28.5 m (93.5 ft) SSW, across the highway from a power pole, 1.92 m (6.3 ft) NW of a witness post, and above level with the centerline of road.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 7 Station ID: 8725685 PUBLICATION DATE: 04/27/2012 Name: CUTOFF SOUTH FL NOAA Chart: 11426 Latitude: 26° 51.3' N ( 26.85500) USGS Quad: PLACIDA Longitude: 82° 18.2' W ( -82.30330) T I D A L D A T U M S Tidal datums at CUTOFF SOUTH based on: LENGTH OF SERIES: 3 MONTHS TIME PERIOD: March 1978 - May 1978 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8725110 NAPLES, GULF OF MEXICO Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 0.454 North American Vertical Datum NAVD88 = 0.385 MEAN HIGH WATER MHW = 0.377 MEAN SEA LEVEL MSL = 0.241 MEAN TIDE LEVEL MTL = 0.238 MEAN LOW WATER MLW = 0.099 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 5685 A 1977 0.721 0.344 5685 B 1977 0.813 0.436 5685 E 1977 0.866 0.489 5685 G 2008 0.685 0.308 5685 H 2008 1.533 1.156 CHA 11 1983 1.298 0.921 CHA 12 1983 1.842 1.465 Foot Notes: Geodetic heights of the bench marks meet all NOAA/NOS/NGS quality control standards for Second Order, Class 1 leveling. It is advised that a confirmation set of levels be established for bench marks 5685 G 2008, 5685 H 2008, CHA 11 1983, and CHA 12 1983 to verify height differences before using tidal bench mark elevation information.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 7 Station ID: 8725685 PUBLICATION DATE: 04/27/2012 Name: CUTOFF SOUTH FL NOAA Chart: 11426 Latitude: 26° 51.3' N ( 26.85500) USGS Quad: PLACIDA Longitude: 82° 18.2' W ( -82.30330) 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.