U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 7 Station ID: 8725809 PUBLICATION DATE: 06/02/2011 Name: MANASOTA FL NOAA Chart: 11424 Latitude: 27° 0.7' N ( 27.01170) USGS Quad: VENICE Longitude: 82° 24.6' W ( -82.41000) To reach the tidal bench marks from the junction of US Highway 41 and State Road 775 south of Venice, proceed south on State Road 775 for 3.5 km (2.2 mi) to junction of Manasota Beach Road, then turn right and proceed west on Manasota Beach Road for 2.6 km (1.6 mi) to the bridge over the Intracoastal Waterway. The bench marks are located along Manasota Beach Road and near its' intersection with Manasota Key Road. The tide gage and staff were located SSW of the west end of the bridge, on a wood dock on the east side of a boat ramp. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 5809 F 1977 DESIGNATION: 872 5809 F TIDAL MONUMENTATION: Tidal Station disk VM#: 6081 AGENCY: National Ocean Survey (NOS) IDB PID#: AG7851 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 27° 0.6' N ( 27.01000) LONGITUDE: 82° 24.7' W ( -82.41170) The primary bench mark is a disk bearing 10.65 m (35 ft) SW of the centerline of Manasota Key Road, 10.97 m (36 ft) NW of the extended centerline of Manasota Beach road, and 0.76 m (2.5 ft) SW of power pole 5-2344-1561-04. The bench mark is set atop a copper-coated steel rod driven to refusal and encased in a PVC pipe that is flush with the ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 7 Station ID: 8725809 PUBLICATION DATE: 06/02/2011 Name: MANASOTA FL NOAA Chart: 11424 Latitude: 27° 0.7' N ( 27.01170) USGS Quad: VENICE Longitude: 82° 24.6' W ( -82.41000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5809 E 1977 DESIGNATION: 872 5809 E TIDAL MONUMENTATION: Tidal Station disk VM#: 6080 AGENCY: National Ocean Survey (NOS) IDB PID#: AG7848 SETTING CLASSIFICATION: Concrete storm drain OPUS PID: LATITUDE: 27° 0.6' N ( 27.01000) LONGITUDE: 82° 24.7' W ( -82.41170) The bench mark is a disk set in the top of a concrete storm drain, bearing 6.25 m (20.5 ft) NW of the centerline of Manasota Beach Road, 29.87 m (98 ft) NE of the centerline of Manasota Key Road, and about 91.44 m (300 ft) SW of the west corner of the bridge over the intra-coastal waterway. BENCH MARK STAMPING: 17 84 C14 DESIGNATION: 17 84 C14 MONUMENTATION: Survey disk VM#: 19916 AGENCY: Florida Dept. of Environmental Protection (FLDEP) IDB PID#: DL2727 SETTING CLASSIFICATION: Round concrete monument OPUS PID: LATITUDE: 26° 59.5' N ( 26.99222) LONGITUDE: 82° 24.2' W ( -82.40253) The bench mark is a disk set in the top of a round concrete monument, recessed 0.2 m (0.6 ft) below the level of the ground and about 0.2 m (0.5 ft) below the level of Manasota Key Road, 30.7 m (100.5 ft) NW of the approximate centerline of a driveway at 7830 Manasota Key Road, 11.0 m (36.0 ft) NW of a power pole number 5-2343-7828-00, 4.4 m (14.3 ft) SW of the approximate centerline of Manasota Key Road and 1.6 m (5.2 ft) NE of a carsonite witness post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 7 Station ID: 8725809 PUBLICATION DATE: 06/02/2011 Name: MANASOTA FL NOAA Chart: 11424 Latitude: 27° 0.7' N ( 27.01170) USGS Quad: VENICE Longitude: 82° 24.6' W ( -82.41000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: E 702 2007 DESIGNATION: E 702 MONUMENTATION: Flange-encased Rod VM#: 19917 AGENCY: National Geodetic Survey (NGS) IDB PID#: DL2728 SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 27° 0.1' N ( 27.00178) LONGITUDE: 82° 24.4' W ( -82.40697) The bench mark is a stainless steel rod located 8.8 M (29.0 ft) NE of the approximate centerline of Manasota Key Road, 3.4 m (11.0 ft) SE of the approximate centerline of a driveway at 8210 Manasota Key Road, and 0.5 m (1.8 ft) SW of a carsonite witness post. The bench mark is a stainless steel rod driven to refusal at a depth of 8.0 m (26.4 ft) with an NGS logo cap (the datum point recessed 0.1 M (0.3 f)t (0.1 m) below the level of the NGS logo cap) flush with the ground and level with Manasota Key Road.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 7 Station ID: 8725809 PUBLICATION DATE: 06/02/2011 Name: MANASOTA FL NOAA Chart: 11424 Latitude: 27° 0.7' N ( 27.01170) USGS Quad: VENICE Longitude: 82° 24.6' W ( -82.41000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: SAR 24 DESIGNATION: SAR 24 MONUMENTATION: Survey disk VM#: 19918 AGENCY: Florida Department of Transportation (FLDT) IDB PID#: AG7846 SETTING CLASSIFICATION: Bridge curb OPUS PID: LATITUDE: 27° 0.7' N ( 27.01225) LONGITUDE: 82° 24.5' W ( -82.40889) The bench mark is a disk set in the bridge curbing, 1.37 m (4.5 ft) NW of the east corner of the bridge, 4.11 m (13.5 ft) SE of the centerline of the road, and 0.03 m (1 ft) above centerline of road.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 7 Station ID: 8725809 PUBLICATION DATE: 06/02/2011 Name: MANASOTA FL NOAA Chart: 11424 Latitude: 27° 0.7' N ( 27.01170) USGS Quad: VENICE Longitude: 82° 24.6' W ( -82.41000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: SAR 25 DESIGNATION: SAR 25 MONUMENTATION: Survey disk VM#: 19919 AGENCY: Florida Department of Transportation (FLDT) IDB PID#: AG7847 SETTING CLASSIFICATION: Bridge curb OPUS PID: LATITUDE: 27° 0.7' N ( 27.01133) LONGITUDE: 82° 24.6' W ( -82.41050) The bench mark is a disk set in the bridge curbing, 1.31 m (4.3 ft) NW of the south corner of the bridge, 3.81 m (12.5 ft) SE of the centerline of the road, and 0.03 m (1 ft) above centerline of road.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 7 Station ID: 8725809 PUBLICATION DATE: 06/02/2011 Name: MANASOTA FL NOAA Chart: 11424 Latitude: 27° 0.7' N ( 27.01170) USGS Quad: VENICE Longitude: 82° 24.6' W ( -82.41000) T I D A L D A T U M S Tidal datums at MANASOTA based on: LENGTH OF SERIES: 3 MONTHS TIME PERIOD: November 1977 - January 1978 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8725744 PUNTA GORDA Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 0.512 MEAN HIGH WATER MHW = 0.424 North American Vertical Datum NAVD88 = 0.410 MEAN SEA LEVEL MSL = 0.266 MEAN TIDE LEVEL MTL = 0.263 MEAN LOW WATER MLW = 0.103 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 5809 F 1977 3.449 3.025 5809 E 1977 2.565 2.141 17 84 C14 1.690 1.266 E 702 2007 1.566 1.141 SAR 24 4.485 4.061 SAR 25 8.413 7.989 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 17 84 C14, E 702 2007, SAR 24, and SAR 25 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: 8725809 PUBLICATION DATE: 06/02/2011 Name: MANASOTA FL NOAA Chart: 11424 Latitude: 27° 0.7' N ( 27.01170) USGS Quad: VENICE Longitude: 82° 24.6' W ( -82.41000) 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.