U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8729538 PUBLICATION DATE: 06/02/2003 Name: GARNIER BAYOU, SHALIMAR FL NOAA Chart: 11385 Latitude: 30° 26.1' N ( 30.43500) USGS Quad: FORT WALTON BEACH Longitude: 86° 35.2' W ( -86.58670) To reach the tidal bench marks from the Shalimar Post Office at the junction of Cherokee Road and State Highway 85, proceed south on Cherokee Road for 0.6 km (0.4 mi) to the Shalimar Yacht Basin. The bench marks are at the Yacht Basin and along State Highway 85. The tide gage and staff were located on the wharf at the Yacht Basin. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 1 1973 DESIGNATION: 872 9538 TIDAL 1 MONUMENTATION: Tidal Station disk VM#: 10153 AGENCY: National Ocean Survey (NOS) IDB PID#: BG3403 SETTING CLASSIFICATION: Concrete retaining wall OPUS PID#: BG3403 LATITUDE: 30° 26.1' N ( 30.43500) LONGITUDE: 86° 35.1' W ( -86.58500) The primary bench mark is a disk set in the top center of a 0.30 m (1.0 ft) wide and 1.83 m (6.0 ft) high concrete retaining wall, on the SE side of the Shalimar Yacht Basin, and 6.40 m (21.0 ft) NW of the centerline of Old Ferry Road. BENCH MARK STAMPING: 2 1973 DESIGNATION: 872 9538 TIDAL 2 MONUMENTATION: Tidal Station disk VM#: 10154 AGENCY: National Ocean Survey (NOS) IDB PID#: BG3402 SETTING CLASSIFICATION: Concrete slab OPUS PID: LATITUDE: 30° 26.2' N ( 30.43670) LONGITUDE: 86° 35.1' W ( -86.58500) The bench mark is a disk set flush in a concrete slab at the Shalimar Yacht Basin, 76 m (250 ft) NW along Gardner Drive from Old Ferry Road, 26 m (85 ft) SW of the centerline of Gardner Drive, 0.3 m (1 ft) SW of the west corner of a one story building, and 0.15 m (0.5 ft) SW of the SW face of the building.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 8729538 PUBLICATION DATE: 06/02/2003 Name: GARNIER BAYOU, SHALIMAR FL NOAA Chart: 11385 Latitude: 30° 26.1' N ( 30.43500) USGS Quad: FORT WALTON BEACH Longitude: 86° 35.2' W ( -86.58670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: Q 297 1967 DESIGNATION: Q 297 MONUMENTATION: Bench Mark disk VM#: 10156 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: BG2047 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 30° 26.9' N ( 30.44830) LONGITUDE: 86° 34.8' W ( -86.58000) The bench mark is a disk set in the top of a concrete monument, 0.3 km (0.2 mi) east along Richbourg Avenue from the east end of Meigs Junior High School in Shalimar, 46 m (151 ft) NW of and across Richbourg Avenue from the west bound lane of State Highway 85, 9.45 m (31.0 ft) east of the centerline of Carl Brandt Drive, 7.62 m (25.0 ft) north of the centerline of Richbourg Avenue, 1.37 m (4.5 ft) SE of the SW corner post of a fence around a park, 0.30 m (1 ft) north of the north edge of a sidewalk along the north side of the avenue, and at ground level. BENCH MARK STAMPING: 3 1973 DESIGNATION: 872 9538 TIDAL 3 MONUMENTATION: Tidal Station disk VM#: 10157 AGENCY: National Ocean Survey (NOS) IDB PID#: BG3399 SETTING CLASSIFICATION: Concrete base OPUS PID#: BG3399 LATITUDE: 30° 26.5' N ( 30.44170) LONGITUDE: 86° 34.9' W ( -86.58170) The bench mark is a disk set in the top of the concrete base for a sign, 7 m (23 ft) NE of the centerline of Cherokee Road, 15 m (50 ft) SE of the centerline of State Highway 85, and 2.44 m (8.0 ft) east of powerline pole # 355.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 8729538 PUBLICATION DATE: 06/02/2003 Name: GARNIER BAYOU, SHALIMAR FL NOAA Chart: 11385 Latitude: 30° 26.1' N ( 30.43500) USGS Quad: FORT WALTON BEACH Longitude: 86° 35.2' W ( -86.58670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 4 1973 DESIGNATION: 872 9538 TIDAL 4 MONUMENTATION: Tidal Station disk VM#: 10158 AGENCY: National Ocean Survey (NOS) IDB PID#: BG3400 SETTING CLASSIFICATION: Concrete base OPUS PID: LATITUDE: 30° 26.4' N ( 30.44000) LONGITUDE: 86° 35.1' W ( -86.58500) The bench mark is a disk set in the top of a 1 m x 2 m (4 ft x 7 ft) concrete base near the north side of the Shalimar Post Office, 5 m (15 ft) NE of the east corner of the Post Office, 38 m (125 ft) NW of the centerline of State Highway 85, 12 m (40 ft) SW of the centerline of Turner Trail, and 2 m (8 ft) SE of a flagpole. BENCH MARK STAMPING: 5 1989 DESIGNATION: 872 9538 TIDAL 5 MONUMENTATION: Tidal Station disk VM#: 10159 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete flagpole foundation OPUS PID: LATITUDE: 30° 26.1' N ( 30.43500) LONGITUDE: 86° 35.2' W ( -86.58670) The bench mark is a disk set flush in the concrete flagpole foundation in front of the Shalimar Police Department Building, 7 m (22 ft) west of the Police Department door step, 17 m (56 ft) south of utility pole # 34364-52917, 8 m (25 ft) east of the centerline of Cherokee Road, 29 m (95 ft) north of a utility pole with a street lamp on it, 0.40 m (1.3 ft) NE from the base of the flagpole, and 0.21 m (0.7 ft) of the NE edge of the concrete base.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8729538 PUBLICATION DATE: 06/02/2003 Name: GARNIER BAYOU, SHALIMAR FL NOAA Chart: 11385 Latitude: 30° 26.1' N ( 30.43500) USGS Quad: FORT WALTON BEACH Longitude: 86° 35.2' W ( -86.58670) T I D A L D A T U M S Tidal datums at GARNIER BAYOU, SHALIMAR based on: LENGTH OF SERIES: 2 YEARS TIME PERIOD: June 1976 - May 1978 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8729840 PENSACOLA, PENSACOLA BAY Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (10/04/1992) = 0.805 MEAN HIGHER HIGH WATER MHHW = 0.124 MEAN HIGH WATER MHW = 0.119 MEAN TIDE LEVEL MTL = 0.064 MEAN SEA LEVEL MSL = 0.059 MEAN LOW WATER MLW = 0.008 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum NAVD88 = -0.060 LOWEST OBSERVED WATER LEVEL (07/08/1992) = 0.104 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 1 1973 2.916 2.797 2 1973 2.194 2.075 Q 297 1967 4.760 4.641 3 1973 3.911 3.792 4 1973 2.940 2.821 5 1989 3.831 3.712
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8729538 PUBLICATION DATE: 06/02/2003 Name: GARNIER BAYOU, SHALIMAR FL NOAA Chart: 11385 Latitude: 30° 26.1' N ( 30.43500) USGS Quad: FORT WALTON BEACH Longitude: 86° 35.2' W ( -86.58670) 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.