U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 7 Station ID: 8725744 PUBLICATION DATE: 01/06/2004 Name: PUNTA GORDA FL NOAA Chart: 11426 Latitude: 26° 55.7' N ( 26.92830) USGS Quad: PUNTA GORDA Longitude: 82° 3.9' W ( -82.06500) To reach the tidal bench marks from the town of Punta Gorda, proceed 0.3 km (0.2 mi) along Taylor Street from the courthouse, then turn left and proceed west along West Retta Esplanade for 1.8 km (1.1 mi) to the intersection with Maude Street, then turn left and proceed north on Maude Street until it reaches a dead end. The tide gage and staff were located near the Gulf Dil Docks. The bench marks are located in the vicinity of the seawall near Maude Street and the intersection of Berry Street and Retta Esplanade. T I D A L B E N C H M A R K S
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 7 Station ID: 8725744 PUBLICATION DATE: 01/06/2004 Name: PUNTA GORDA FL NOAA Chart: 11426 Latitude: 26° 55.7' N ( 26.92830) USGS Quad: PUNTA GORDA Longitude: 82° 3.9' W ( -82.06500) T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: GORDA 1934 DESIGNATION: GORDA MONUMENTATION: Triangulation Station disk VM#: 11154 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: AG1628 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 26° 55.9' N ( 26.93170) LONGITUDE: 82° 3.5' W ( -82.05830) The primary bench mark is a disk set in top of a 0.30 m (1.0 ft) diameter concrete post near the west corner of the lawn of the Kiwanis Scout House, 67.21 m (220.5 ft) NW of the centerline of Retta Esplanade, 23.01 m (75.5 ft) SE of the edge of the seawall along Peace River, 7.68 m (25.2 ft) SW of the west corner of the building, and 5.49 m (18.0 ft) NE of the NE edge of the concrete curb that is along the SW edge of the lawn. BENCH MARK STAMPING: BM 1 1955 DESIGNATION: 872 5744 TIDAL 1 MONUMENTATION: Tidal Station disk VM#: 11150 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: AG1630 SETTING CLASSIFICATION: Concrete base of brick supports OPUS PID: LATITUDE: 26° 55.7' N ( 26.92830) LONGITUDE: 82° 3.9' W ( -82.06500) The bench mark is a disk set in the top of the concrete base of the brick supports for storage tank No. 4 at the Gulf Oil Dock on the Municipal Pier off Maude Street, 10.82 m (35.5 ft) SSE of the south corner of the pump house building, and 3.26 m (10.7 ft) NE of the SW edge of the concrete dock. NOTE: Mark not found in 1989, 1994.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 7 Station ID: 8725744 PUBLICATION DATE: 01/06/2004 Name: PUNTA GORDA FL NOAA Chart: 11426 Latitude: 26° 55.7' N ( 26.92830) USGS Quad: PUNTA GORDA Longitude: 82° 3.9' W ( -82.06500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: BM 2 1955 DESIGNATION: 872 5744 TIDAL 2 MONUMENTATION: Tidal Station disk VM#: 11151 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: AG1631 SETTING CLASSIFICATION: Concrete foundation of garage OPUS PID: LATITUDE: 26° 55.7' N ( 26.92830) LONGITUDE: 82° 3.9' W ( -82.06500) The bench mark is a disk set in the top of the westernmost corner of the concrete foundation of the garage at the Gulf Oil Dock, 22 m (72 ft) SW of the centerline of Maude Street, 18.14 m (59.5 ft) NE of the SW edge of the dock, and 6.40 m (21.0 ft) NE of the most eastern corner of the concrete foundation of the main truck loading shed. NOTE: Mark not found in 1989, 1994 and 2001.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 7 Station ID: 8725744 PUBLICATION DATE: 01/06/2004 Name: PUNTA GORDA FL NOAA Chart: 11426 Latitude: 26° 55.7' N ( 26.92830) USGS Quad: PUNTA GORDA Longitude: 82° 3.9' W ( -82.06500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: GORDA NO 2 1934 DESIGNATION: GORDA RM 2 MONUMENTATION: Reference Mark disk VM#: 11155 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: AG1629 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 26° 55.9' N ( 26.93099) LONGITUDE: 82° 3.5' W ( -82.05879) The bench mark is a disk set in the top of a concrete monument at the south corner of the lawn at the Lou Calder Scout House, 32.31 m (106.0 ft) south of the south corner of the house, 8.69 m (28.5 ft) NW of the centerline of Retta Esplanade, 2.44 m (8.0 ft) SW of the centerline of the driveway leading to the house, 2.29 m (7.5 ft) SE of a lone 0.76 m (2.5 ft) diameter palm tree, 0.30 m (1.0 ft) NW of a metal witness post, and 0.06 m (0.2 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 7 Station ID: 8725744 PUBLICATION DATE: 01/06/2004 Name: PUNTA GORDA FL NOAA Chart: 11426 Latitude: 26° 55.7' N ( 26.92830) USGS Quad: PUNTA GORDA Longitude: 82° 3.9' W ( -82.06500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: GORDA 1934 NO 5 1974 DESIGNATION: GORDA RM 5 MONUMENTATION: Reference Mark disk VM#: 11156 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: AG1627 SETTING CLASSIFICATION: Concrete sea wall OPUS PID: LATITUDE: 26° 55.9' N ( 26.93136) LONGITUDE: 82° 3.6' W ( -82.05917) The bench mark is a disk set flush in the top of the concrete seawall at the Lou Calder Scout House, 63 m (208 ft) NW of the centerline of Retta Esplanade, 28 m (92 ft) WSW of the south corner of the Scout House, 13 m (43 ft) SW of the west corner of the house, 4.57 m (15.0 ft) SW of triangulation station GORDA 1934, and 0.12 m (0.4 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 7 Station ID: 8725744 PUBLICATION DATE: 01/06/2004 Name: PUNTA GORDA FL NOAA Chart: 11426 Latitude: 26° 55.7' N ( 26.92830) USGS Quad: PUNTA GORDA Longitude: 82° 3.9' W ( -82.06500) T I D A L D A T U M S Tidal datums at PUNTA GORDA based on: LENGTH OF SERIES: 8 MONTHS TIME PERIOD: July 1977 - February 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 = 0.598 MEAN HIGH WATER MHW = 0.519 North American Vertical Datum NAVD88 = 0.502 MEAN TIDE LEVEL MTL = 0.328 MEAN SEA LEVEL MSL = 0.326 MEAN LOW WATER MLW = 0.137 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW GORDA 1934 1.400 0.881 BM 1 1955 1.679 1.160 BM 2 1955 1.869 1.350 GORDA NO 2 1934 1.433 0.914 GORDA 1934 NO 5 1974 1.450 0.931
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 7 Station ID: 8725744 PUBLICATION DATE: 01/06/2004 Name: PUNTA GORDA FL NOAA Chart: 11426 Latitude: 26° 55.7' N ( 26.92830) USGS Quad: PUNTA GORDA Longitude: 82° 3.9' W ( -82.06500) 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.