U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 6 Station ID: 8726364 PUBLICATION DATE: 04/21/2003 Name: MULLET KEY, TAMPA BAY FL NOAA Chart: 11414 Latitude: 27° 36.9' N ( 27.61500) USGS Quad: ANNA MARIA Longitude: 82° 43.6' W ( -82.72670) To reach the tidal bench marks from the post office at the intersection of 1st Avenue North and 4th Street in St Petersburg, proceed west on 1st Avenue North for 4.0 km (2.5 mi) to 34th Street (U.S. Highway 19), then south on U.S. Highway 19 for 5.8 km (3.6 mi) to Pinellas Bayway, then west on Pinellas Bayway for 3.7 km (2.3 mi), continue south on Pinellas Bayway for 10.6 km (6.6 mi) to Anderson Boulevard, go SW on Anderson Boulevard for 1.69 km (l.05 mi) to old Fort DeSoto, then 0.6 km (0.4 mi) south along a paved road that leads to the parking area and fishing pier at the old fort. The bench marks are in the area between the fort and the fishing pier. The tide gage and staff were on the fishing pier. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 6364 A 1976 DESIGNATION: 872 6364 A TIDAL MONUMENTATION: Tidal Station disk VM#: 11302 AGENCY: National Ocean Survey (NOS) IDB PID#: AG0290 SETTING CLASSIFICATION: Concrete culvert OPUS PID: LATITUDE: 27° 36.9' N ( 27.61500) LONGITUDE: 82° 43.8' W ( -82.73000) The primary bench mark is a disk set in the top of a concrete culvert in Fort Desoto Park between pier 1 and pier 2, 70 m (231 ft) north of the shoreline, 9 m (29 ft) east of the centerline of the asphalt road, and 3.11 m (10.2 ft) NW of the SE end of the culvert.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 6 Station ID: 8726364 PUBLICATION DATE: 04/21/2003 Name: MULLET KEY, TAMPA BAY FL NOAA Chart: 11414 Latitude: 27° 36.9' N ( 27.61500) USGS Quad: ANNA MARIA Longitude: 82° 43.6' W ( -82.72670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 10 1957 DESIGNATION: 872 6364 TIDAL 10 ALIAS: TIDAL 10 STA III 34 MONUMENTATION: Tidal Station disk VM#: 11300 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: AG5204 SETTING CLASSIFICATION: Concrete base OPUS PID: LATITUDE: 27° 36.9' N ( 27.61500) LONGITUDE: 82° 44.2' W ( -82.73670) The bench mark is a disk set in the top of the NE corner of a 1.83 m (6.0 ft) square concrete and shell base for a partially destroyed 12 m (40 ft) high observation tower, about 0.4 km (0.3 mi) SW of Fort Desoto, 89 m (291 ft) SE of the SE corner of the fishing pier, 32.09 m (105.3 ft) NE of a sea wall, and 1 m (3 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 6 Station ID: 8726364 PUBLICATION DATE: 04/21/2003 Name: MULLET KEY, TAMPA BAY FL NOAA Chart: 11414 Latitude: 27° 36.9' N ( 27.61500) USGS Quad: ANNA MARIA Longitude: 82° 43.6' W ( -82.72670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 12 1957 DESIGNATION: 872 6364 TIDAL 12 ALIAS: TIDAL 12 STA III 34 MONUMENTATION: Tidal Station disk VM#: 11301 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: AG5203 SETTING CLASSIFICATION: Concrete platform OPUS PID: LATITUDE: 27° 36.8' N ( 27.61330) LONGITUDE: 82° 44.2' W ( -82.73670) The bench mark is a disk set in the top of the SE corner of a 5 x 4 x 1 m (16 x 12 x 2 ft) high concrete platform, 180 m (592 ft) east of Bench Mark 10 1957, 122 m (400 ft) north of the shoreline, 46 m (150 ft) west of the centerline of the brick pavement, and 30 m (100 ft) north of the projected centerline of the east-west brick pavement. BENCH MARK STAMPING: 6364 B 1990 DESIGNATION: 872 6364 B TIDAL MONUMENTATION: Flange-encased Rod VM#: 11303 AGENCY: National Ocean Service (NOS) IDB PID#: AG9426 SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: AG9426 LATITUDE: 27° 37.0' N ( 27.61670) LONGITUDE: 82° 43.6' W ( -82.72670) The bench mark is a flange-encased rod located near the west end of the sign for the fishing pier, 73 m (240 ft) NE of the east edge of the south entrance to the pier parking lot, 22.10 m (72.5 ft) SE of a paved road, 19.23 m (63.1 ft) north of the north edge of the parking lot, and 1.28 m (4.2 ft) NW of the SW corner of the fishing pier sign. The datum point is the top of a stainless steel rod driven 18.3 m (60 ft) to refusal, and encased in 5-inch logo cap.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 6 Station ID: 8726364 PUBLICATION DATE: 04/21/2003 Name: MULLET KEY, TAMPA BAY FL NOAA Chart: 11414 Latitude: 27° 36.9' N ( 27.61500) USGS Quad: ANNA MARIA Longitude: 82° 43.6' W ( -82.72670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: DESIGNATION: PINELLAS ALIAS: 872 6364 TIDAL MONUMENTATION: Survey disk VM#: 11304 AGENCY: Pinellas County IDB PID#: AG9428 SETTING CLASSIFICATION: Sea wall OPUS PID: LATITUDE: 27° 36.9' N ( 27.61500) LONGITUDE: 82° 43.6' W ( -82.72670) The bench mark is a disk set in the surface of the concrete sea wall on the NE side of the fishing pier, 83 m (272 ft) NW of the concession building, 57 m (186 ft) east of the rest room building, 52 m (169 ft) SE of the SE edge of the paved parking lot, 5 m (15 ft) NE of the NE side of the concrete pier, and 1 m (3 ft) below pier level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 6 Station ID: 8726364 PUBLICATION DATE: 04/21/2003 Name: MULLET KEY, TAMPA BAY FL NOAA Chart: 11414 Latitude: 27° 36.9' N ( 27.61500) USGS Quad: ANNA MARIA Longitude: 82° 43.6' W ( -82.72670) T I D A L D A T U M S Tidal datums at MULLET KEY, TAMPA BAY based on: LENGTH OF SERIES: 2 Years TIME PERIOD: June 1990 - May 1991 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8726520 ST. PETERSBURG, TAMPA BAY Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (12/03/1990) = 1.041 MEAN HIGHER HIGH WATER MHHW = 0.634 MEAN HIGH WATER MHW = 0.556 North American Vertical Datum NAVD88 = 0.464 MEAN SEA LEVEL MSL = 0.338 MEAN TIDE LEVEL MTL = 0.331 MEAN LOW WATER MLW = 0.106 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (01/19/1977) = -0.659 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 6364 A 1976 1.417 0.861 10 1957 2.088 1.532 12 1957 2.742 2.186 6364 B 1990 1.276 0.720 PINELLAS 2.283 1.727
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 6 Station ID: 8726364 PUBLICATION DATE: 04/21/2003 Name: MULLET KEY, TAMPA BAY FL NOAA Chart: 11414 Latitude: 27° 36.9' N ( 27.61500) USGS Quad: ANNA MARIA Longitude: 82° 43.6' W ( -82.72670) 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.