U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 4 PUBLICATION DATE: 04/27/1984 Station ID: 8729849 SUPERCEDED DATE: 04/21/2003 Name: WARRINGTON, BAYOU CHICO FLORIDA NOAA Chart: 11383 Latitude: 30° 24.1' N USGS Quad: WEST PENSACOLA Longitude: 87° 15.2' W To reach the tidal bench marks from the intersection of Pace Boulevard (SR 292) and West Garden Street (U.S. Highway 98 Business) in Pensacola, proceed south for 1.3 miles (2.1 km) on Pace Boulevard to the intersection of Barrancas Avenue and Lakewood Road, along Lakewood Road 0.4 miles (0.6 km) to Audusson Avenue, then 0.1 miles (0.2 km) on Audusson Avenue to Recho Bell Marine Service and Bayou Chico. The bench marks are located on the Recho Bell Marine Service property and near the WCOA Radio Station and the tide gage and staff were located on the easternmost dock at Recho Bell Marine Service. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 9849 A 1977 MONUMENTATION: Survey Disk VM#: 10273 AGENCY: PID#: BG3653 SETTING CLASSIFICATION: Concrete Wall The bench mark is set flush in the concrete wall along the east property line of the Recho Bell Marine Service, 70 feet (21 m) east of the NE corner of Mr. Recho Bells residence, 58.5 feet (17.8 m) SSE of the north end of the concrete wall at the waters edge, and 2 feet (1 m) north of the south end of the concrete wall. BENCH MARK STAMPING: 9849 B 1977 MONUMENTATION: Survey Disk VM#: 10274 AGENCY: PID#: BG3652 SETTING CLASSIFICATION: Copper-Clad Steel Rod The bench mark is NE of the intersection of Audusson Avenue and Lakewood Road, 47 feet (14 m) west of the SW corner of house at 3 Audusson Avenue, 31 feet (9 m) SE of centerline of Audusson Avenue, 27 feet (8 m) NNW of centerline of Lakewood Road, and 3.4 feet (1.0 m) east of power pole. The bench mark is 0.4 foot (0.1 m) below ground level, crimped to a copper-clad steel rod driven 40 feet (12 m), and encased in a PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 4 PUBLICATION DATE: 04/27/1984 Station ID: 8729849 SUPERCEDED DATE: 04/21/2003 Name: WARRINGTON, BAYOU CHICO FLORIDA NOAA Chart: 11383 Latitude: 30° 24.1' N USGS Quad: WEST PENSACOLA Longitude: 87° 15.2' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: 9849 C 1977 MONUMENTATION: Survey Disk VM#: 10275 AGENCY: PID#: BG3649 SETTING CLASSIFICATION: Copper-Clad Steel Rod The bench mark is SE of the dirt drive leading SW from Lakewood Road to the broadcast towers, 110 feet (34 m) west of the NE corner of the broadcast building at the WCOA Radio Station, 43 feet (13 m) SW of the centerline of Lakewood Road, and 3.5 feet (1.1 m) west of a power pole with a witness sign. The bench mark is 0.3 foot (0.1 m) below ground level, crimped to a copperclad steel rod driven 40 feet (12 m), and encased in a PVC pipe and concrete kickblock. BENCH MARK STAMPING: 9849 D 1977 MONUMENTATION: Survey Disk VM#: 10276 AGENCY: PID#: BG3651 SETTING CLASSIFICATION: Concrete Foundation The bench mark is set flush in the foundation of a storage building behind the WCOA Radio Station, 165.5 feet (50.4 m) SSW ofthe centerline of Lakewood Road, 27.3 feet (8.3 m) SW of the SW corner of the WCOA Broadcast Building, and 1.8 feet (0.5 m) east of the NW corner of the storage building foundation. BENCH MARK STAMPING: 9849 E 1977 MONUMENTATION: Survey Disk VM#: 10277 AGENCY: PID#: BG3650 SETTING CLASSIFICATION: Concrete Footing The bench mark is set flush in the SW corner of the easternmost radio tower footing, and 361 feet (110 m) south of the SE corner of the WCOA Radio Station Broadcast Building on Lakewood Road.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 4 PUBLICATION DATE: 04/27/1984 Station ID: 8729849 SUPERCEDED DATE: 04/21/2003 Name: WARRINGTON, BAYOU CHICO FLORIDA NOAA Chart: 11383 Latitude: 30° 24.1' N USGS Quad: WEST PENSACOLA Longitude: 87° 15.2' W T I D A L D A T U M S Tidal datums at WARRINGTON, BAYOU CHICO based on: LENGTH OF SERIES: 3 MONTHS TIME PERIOD: MARCH-MAY 1977 TIDAL EPOCH: 1960-1978 CONTROL TIDE STATION: 8729840 PENSACOLA Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET: HIGHEST OBSERVED WATER LEVEL (04/20/1977) = 2.00 MEAN HIGHER HIGH WATER MHHW = 1.25 MEAN HIGH WATER MHW = 1.20 MEAN TIDE LEVEL MTL = 0.63 MEAN LOW WATER MLW = 0.05 MEAN LOWER LOW WATER MLLW = 0.00 LOWEST OBSERVED WATER LEVEL (03/01/1977) = -1.23 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In FEET above: Stamping or Designation MLLW MHW 9849 A 1977 12.21 11.01 9849 B 1977 19.49 18.29 9849 C 1977 22.07 20.87 9849 D 1977 22.79 21.59 9849 E 1977 25.07 23.87
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 4 PUBLICATION DATE: 04/27/1984 Station ID: 8729849 SUPERCEDED DATE: 04/21/2003 Name: WARRINGTON, BAYOU CHICO FLORIDA NOAA Chart: 11383 Latitude: 30° 24.1' N USGS Quad: WEST PENSACOLA Longitude: 87° 15.2' 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.