U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 4 PUBLICATION DATE: 09/04/1984 Station ID: 8727336 SUPERCEDED DATE: 04/21/2003 Name: DIXIE BAY, SALT RIVER FLORIDA NOAA Chart: 11409 Latitude: 28° 52.9' N USGS Quad: RED LEVEL Longitude: 82° 38.1' W To reach the tidal bench marks from the intersection of U.S. Highway 19-98 and State Highway 44 proceed west on S-44 2.35 miles (3.78 km) to its intersection with Suncoast Boulevard, turn left and proceed on Suncoast Boulevard 1.0 mile (1.6 km), turn left and proceed on Dixie Shore Drive 0.1 mile (0.2 km) to Bay Shore Drive, turn right and follow Bay Shore Dirve 0.4 mile (0.6 km) to a one story brick house on the left. The bench marks are located along Bayshore Drive. The tide gage and staff were located on the dock behind the private brick residence. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 7336 B 1978 MONUMENTATION: Survey Disk VM#: 7791 AGENCY: PID#: AL7758 SETTING CLASSIFICATION: Unspecified Steel Rod The bench mark is 178.0 feet (54.2 m) west of Bench Mark 7336 C 1978, 157.0 feet (47.9 m) SW of the sea wall end of the canal, 108.0 feet (32.9 m) NNW of the NW corner of a garage, and 4.3 feet (1.3 m) south of a witness sign nailed to power pole #234. The bench mark is crimped to a steel rod driven 24 feet (7 m) to refusal, and encased in a PVC pipe and concrete kickblock. BENCH MARK STAMPING: 7336 A 1978 MONUMENTATION: Survey Disk VM#: 7790 AGENCY: PID#: AL7759 SETTING CLASSIFICATION: Concrete Post The bench mark is near the private brick residence, 203.8 feet (62.1 m) NE of Bench Mark 7336 B 1978, 75.8 feet (23.1 m) south of the SW corner of garage of the private residence, 14.9 feet (4.5 m) NW of the centerline of Bay Shore Drive, 3.7 feet (1.1 m) SE of a witness sign nailed to telephone pole #41451, and set in a concrete post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 4 PUBLICATION DATE: 09/04/1984 Station ID: 8727336 SUPERCEDED DATE: 04/21/2003 Name: DIXIE BAY, SALT RIVER FLORIDA NOAA Chart: 11409 Latitude: 28° 52.9' N USGS Quad: RED LEVEL Longitude: 82° 38.1' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: 7336 C 1978 MONUMENTATION: Survey Disk VM#: 7792 AGENCY: PID#: AL7760 SETTING CLASSIFICATION: Concrete Post The bench mark is 336.0 feet (102.4 m) west of Bench Mark 7336 D 1978, 112.0 feet (34.1 m) south of the sea wall of the canal, 99.6 feet (30.3 m) north of the NE corner of a private residence, 20.0 feet (6.1 m) north of the centerline of Bay Shore Drive, 5.5 feet (1.7 m) east of power pole #233, and set in a concrete post. BENCH MARK STAMPING: 7336 D 1978 MONUMENTATION: Survey Disk VM#: 7793 AGENCY: PID#: AL7757 SETTING CLASSIFICATION: Unspecified Steel Rod The bench mark is 200.3 feet (61.1 m) west of Bench Mark 7336 E 1978, 41.8 feet (12.7 m) SE of power pole #445, 12.4 feet(3.8 m) south of the centerline of Bay Shore Drive, and 3.0 feet (0.9 m) north of witness sign nailed to power pole #442408. The bench mark is crimped to a steel rod driven 16 feet (5 m) to refusal and encased in a PVC pipe and concrete kickblock. BENCH MARK STAMPING: 7336 E 1978 MONUMENTATION: Survey Disk VM#: 7794 AGENCY: PID#: AL7756 SETTING CLASSIFICATION: Concrete Post The bench mark is 200.3 feet (61.1 m) east of Bench Mark 7336 D 1978, 79.0 feet (24.1 m) south of SW corner of a private residence, 13.0 feet (4.0 m) south of the centerline of Bay Shore Drive, 2.0 feet (0.6 m) north of a witness sign nailed to power pole #41446, and set in a concrete post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 4 PUBLICATION DATE: 09/04/1984 Station ID: 8727336 SUPERCEDED DATE: 04/21/2003 Name: DIXIE BAY, SALT RIVER FLORIDA NOAA Chart: 11409 Latitude: 28° 52.9' N USGS Quad: RED LEVEL Longitude: 82° 38.1' W T I D A L D A T U M S Tidal datums at DIXIE BAY, SALT RIVER based on: LENGTH OF SERIES: 2 MONTHS TIME PERIOD: JULY-AUGUST 1978 TIDAL EPOCH: 1960-1978 CONTROL TIDE STATION: 8727520 CEDAR KEY Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET: HIGHEST OBSERVED WATER LEVEL (12/05/1978) = 4.09 MEAN HIGHER HIGH WATER MHHW = 2.15 MEAN HIGH WATER MHW = 1.87 MEAN TIDE LEVEL MTL = 1.04 MEAN LOW WATER MLW = 0.21 MEAN LOWER LOW WATER MLLW = 0.00 LOWEST OBSERVED WATER LEVEL (06/11/1978) = 0.08 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In FEET above: Stamping or Designation MLLW MHW 7336 B 1978 4.97 3.10 7336 A 1978 4.61 2.74 7336 C 1978 5.28 3.41 7336 D 1978 5.40 3.53 7336 E 1978 5.69 3.82
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 4 PUBLICATION DATE: 09/04/1984 Station ID: 8727336 SUPERCEDED DATE: 04/21/2003 Name: DIXIE BAY, SALT RIVER FLORIDA NOAA Chart: 11409 Latitude: 28° 52.9' N USGS Quad: RED LEVEL Longitude: 82° 38.1' W 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 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.