U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 6 Station ID: 8729154 PUBLICATION DATE: 02/13/2004 Name: BURNT MILL CREEK, WEST BAY FL NOAA Chart: 11390 Latitude: 30° 19.7' N ( 30.32830) USGS Quad: WEST BAY Longitude: 85° 45.8' W ( -85.76330) To reach the tidal bench marks from the intersection of State Highway 79 and State Road 388 in West Bay, proceed east on State Road 388 for 9.3 km (5.8 mi) to the intersection of South Burnt Mill Creek Road, then turn right and proceed south on South Burnt Mill Creek Road for 0.24 km (0.15 mi) to the residence of C.L. Boyd. The bench marks are in the vicintiy of the Boyd residence and along State Road 388. The tide gage and staff were located on the dock behind the Boyd residence. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 9154 A 1976 DESIGNATION: 872 9154 A TIDAL MONUMENTATION: Tidal Station disk VM#: 10027 AGENCY: National Ocean Survey (NOS) IDB PID#: BE2977 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 30° 19.7' N ( 30.32830) LONGITUDE: 85° 45.7' W ( -85.76170) The primary bench mark is a disk located 54.86 m (180.0 ft) east of bench mark 9154 C 1976, 13.78 m (45.2 ft) south of the centerline of State Road 388, 5.27 m (17.3 ft) east of the centerline of South Burnt Mill Creek Road, and 0.40 m (1.3 ft) west powerline pole #60207-48510. The bench mark is set 0.15 m (0.5 ft) below ground level, crimped to the top of a copper-clad steel rod driven an unspecified depth to refusal, 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 6 Station ID: 8729154 PUBLICATION DATE: 02/13/2004 Name: BURNT MILL CREEK, WEST BAY FL NOAA Chart: 11390 Latitude: 30° 19.7' N ( 30.32830) USGS Quad: WEST BAY Longitude: 85° 45.8' W ( -85.76330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 9154 B 1976 DESIGNATION: 872 9154 B TIDAL MONUMENTATION: Tidal Station disk VM#: 10028 AGENCY: National Ocean Survey (NOS) IDB PID#: BE2978 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 30° 19.6' N ( 30.32670) LONGITUDE: 85° 45.7' W ( -85.76170) The bench mark is a disk located on the property of C.L. Boyd, 221 m (726 ft) south of bench mark 9154 A 1976, 38.56 m (126.5 ft) east of the SE corner of the Boyd residence, 7.62 m (25.0 ft) WSW of the centerline of South Burnt Mill Creek Road, and 0.85 m (2.8 ft) north of a power pole. The bench mark is set 0.18 m (0.6 ft) below ground level, crimped to the top of a copper-clad steel rod driven an unspecified depth to refusal, and encased in a PVC pipe and concrete kickblock. BENCH MARK STAMPING: 9154 C 1976 DESIGNATION: 872 9154 C TIDAL MONUMENTATION: Tidal Station disk VM#: 10029 AGENCY: National Ocean Survey (NOS) IDB PID#: BE2979 SETTING CLASSIFICATION: Concrete culvert head wall OPUS PID#: BE2979 LATITUDE: 30° 19.7' N ( 30.32830) LONGITUDE: 85° 45.8' W ( -85.76330) The bench mark is a disk set in top center of a concrete culvert headwall, 67 m (220 ft) east of the east end of the State Road 388 bridge over Burnt Mill Creek, 46.33 m (152.0 ft) west of the centerline of South Burnt Mill Creek Road, and 8.17 m (26.8 ft) south of the centerline of the highway.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 6 Station ID: 8729154 PUBLICATION DATE: 02/13/2004 Name: BURNT MILL CREEK, WEST BAY FL NOAA Chart: 11390 Latitude: 30° 19.7' N ( 30.32830) USGS Quad: WEST BAY Longitude: 85° 45.8' W ( -85.76330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 9154 F DESIGNATION: 872 9154 F TIDAL FLDT MONUMENTATION: Survey disk VM#: 10032 AGENCY: Florida Department of Transportation (FLDT) IDB PID#: BE2980 SETTING CLASSIFICATION: Concrete bridge rail OPUS PID#: BE2980 LATITUDE: 30° 19.7' N ( 30.32830) LONGITUDE: 85° 45.8' W ( -85.76330) The bench mark is a disk set in the top of the bridge railing at the NE corner of the State Road 388 bridge over Burnt Mill Creek, 5.79 m (19.0 ft) north of the centerline of the highway, 1.07 m (3.5 ft) west of the east end of the railing, and 0.91 m (3.0 ft) above the level of the road.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 6 Station ID: 8729154 PUBLICATION DATE: 02/13/2004 Name: BURNT MILL CREEK, WEST BAY FL NOAA Chart: 11390 Latitude: 30° 19.7' N ( 30.32830) USGS Quad: WEST BAY Longitude: 85° 45.8' W ( -85.76330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: C 42 1934 20.738 DESIGNATION: C 42 MONUMENTATION: Bench Mark disk VM#: 10033 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: BE0615 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 30° 19.8' N ( 30.33000) LONGITUDE: 85° 45.7' W ( -85.76170) The bench mark is a disk set in the top of a concrete monument, 0.3 km (0.2 mi) east of the east end of the State Road 388 bridge over Burnt Mill Creek, 128 m (419 ft) north of the centerline of the highway, 13.72 m (45.0 ft) west of the centerline of another logging road, 0.3 m (1 ft) west of a witness post, and at ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 6 Station ID: 8729154 PUBLICATION DATE: 02/13/2004 Name: BURNT MILL CREEK, WEST BAY FL NOAA Chart: 11390 Latitude: 30° 19.7' N ( 30.32830) USGS Quad: WEST BAY Longitude: 85° 45.8' W ( -85.76330) T I D A L D A T U M S Tidal datums at BURNT MILL CREEK, WEST BAY based on: LENGTH OF SERIES: 3 MONTHS TIME PERIOD: October 1976 - December 1976 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8729840 PENSACOLA, PENSACOLA BAY Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 0.433 MEAN HIGH WATER MHW = 0.404 MEAN TIDE LEVEL MTL = 0.218 MEAN SEA LEVEL MSL = 0.205 North American Vertical Datum NAVD88 = 0.156 MEAN LOW WATER MLW = 0.033 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 9154 A 1976 5.031 4.627 9154 B 1976 3.729 3.325 9154 C 1976 4.524 4.120 9154 F 5.014 4.610 C 42 1934 20.738 6.357 5.953
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 6 Station ID: 8729154 PUBLICATION DATE: 02/13/2004 Name: BURNT MILL CREEK, WEST BAY FL NOAA Chart: 11390 Latitude: 30° 19.7' N ( 30.32830) USGS Quad: WEST BAY Longitude: 85° 45.8' W ( -85.76330) 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.