U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 7 Station ID: 8729868 PUBLICATION DATE: 02/05/2004 Name: PENSACOLA, NAVAL AIR STATION FL NOAA Chart: 11382 Latitude: 30° 20.7' N ( 30.34500) USGS Quad: FORT BARRANCAS Longitude: 87° 16.4' W ( -87.27330) To reach the tidal bench marks from the main entrance to the Pensacola Naval Air Station, proceed 2.33 km (1.45 mi) SE on Murry Boulevard to Saufley Street, then turn left and proceed east on Saufley Street for 0.5 km (0.3 mi) to East Avenue, then turn right and proceed south on East Avenue for 0.5 km (0.3 mi) to Dallas Avenue, then turn right and proceed 0.40 km (0.25 mi) west on Dallas Avenue to Building No. 75 on the south side of Dallas Avenue. The bench marks are located in area along Dallas Avenue and the sea wall. The tide gage and staff were located on a concrete dock south of building No. 75. T I D A L B E N C H M A R K S
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 7 Station ID: 8729868 PUBLICATION DATE: 02/05/2004 Name: PENSACOLA, NAVAL AIR STATION FL NOAA Chart: 11382 Latitude: 30° 20.7' N ( 30.34500) USGS Quad: FORT BARRANCAS Longitude: 87° 16.4' W ( -87.27330) T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 7.792 K 9 1918 DESIGNATION: K 9 MONUMENTATION: Bench Mark disk VM#: 10281 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: BG1813 SETTING CLASSIFICATION: Brick wall OPUS PID: LATITUDE: 30° 20.8' N ( 30.34670) LONGITUDE: 87° 16.3' W ( -87.27170) The primary bench mark is a disk set vertically in the west face of a brick wall between Jayne and West Avenues, 18.75 m (61.5 ft) east and across Jayne Avenue from the SE corner of building No. 216, 11.58 m (38.0 ft) north of the centerline of Dallas Street, 6.40 m (21.0 ft) east of the centerline of Jayne Avenue, and 0.30 m (1.0 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 7 Station ID: 8729868 PUBLICATION DATE: 02/05/2004 Name: PENSACOLA, NAVAL AIR STATION FL NOAA Chart: 11382 Latitude: 30° 20.7' N ( 30.34500) USGS Quad: FORT BARRANCAS Longitude: 87° 16.4' W ( -87.27330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 7.507 L 9 1918 DESIGNATION: L 9 MONUMENTATION: Bench Mark disk VM#: 10282 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: BG1814 SETTING CLASSIFICATION: Building wall OPUS PID: LATITUDE: 30° 20.7' N ( 30.34500) LONGITUDE: 87° 16.2' W ( -87.27000) The bench mark is a disk set vertically in the north face of building No. 27, 91 m (300 ft) SSE of the junction of South and West Avenues, 78 m (255 ft) south of the centerline of South Avenue, 0.27 m (0.9 ft) west of the NE corner of building No. 27, and 0.61 m (2.0 ft) above the level of the pavement. BENCH MARK STAMPING: NO 1 1934 DESIGNATION: 872 9868 TIDAL 1 MONUMENTATION: Tidal Station disk VM#: 10283 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: BG1815 SETTING CLASSIFICATION: Concrete curb OPUS PID: LATITUDE: 30° 20.7' N ( 30.34500) LONGITUDE: 87° 16.1' W ( -87.26830) The bench mark is a disk set the in top of the concrete curb of the south foundation of building No. 71, 87 m (285 ft) south of the centerline of South Avenue, 9.14 m (30.0 ft) north of the sea wall on the north shore of Pensacola Bay, and 0.15 m (0.5 ft) above pavement level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 7 Station ID: 8729868 PUBLICATION DATE: 02/05/2004 Name: PENSACOLA, NAVAL AIR STATION FL NOAA Chart: 11382 Latitude: 30° 20.7' N ( 30.34500) USGS Quad: FORT BARRANCAS Longitude: 87° 16.4' W ( -87.27330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: B 161 1955 DESIGNATION: B 161 MONUMENTATION: Bench Mark disk VM#: 10284 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: BG1810 SETTING CLASSIFICATION: Concrete pillar OPUS PID: LATITUDE: 30° 20.9' N ( 30.34830) LONGITUDE: 87° 16.6' W ( -87.27670) The bench mark is a disk set vertically in the west face of a large concrete pillar at the SW corner of the porch of building No. 624, at the junction of Fisher Avenue and Dallas Street, on the south side of the building, 0.30 m (1.0 ft) north of the SW corner of the porch, and 0.55 m (1.8 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 7 Station ID: 8729868 PUBLICATION DATE: 02/05/2004 Name: PENSACOLA, NAVAL AIR STATION FL NOAA Chart: 11382 Latitude: 30° 20.7' N ( 30.34500) USGS Quad: FORT BARRANCAS Longitude: 87° 16.4' W ( -87.27330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: C 161 1955 DESIGNATION: C 161 MONUMENTATION: Bench Mark disk VM#: 10285 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: BG1809 SETTING CLASSIFICATION: Building foundation OPUS PID: LATITUDE: 30° 20.8' N ( 30.34670) LONGITUDE: 87° 16.8' W ( -87.28000) The bench mark is a disk set vertically in the north face of the concrete foundation of building No. 632, 5.49 m (18.0 ft) south of the south curb of Dallas Street, 0.46 m (1.5 ft) west of the NE corner of the building, and 0.61 m (2.0 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 7 Station ID: 8729868 PUBLICATION DATE: 02/05/2004 Name: PENSACOLA, NAVAL AIR STATION FL NOAA Chart: 11382 Latitude: 30° 20.7' N ( 30.34500) USGS Quad: FORT BARRANCAS Longitude: 87° 16.4' W ( -87.27330) T I D A L D A T U M S Tidal datums at PENSACOLA, NAVAL AIR STATION based on: LENGTH OF SERIES: 4 MONTHS TIME PERIOD: March 1977 - June 1977 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 = 0.364 MEAN HIGH WATER MHW = 0.354 MEAN TIDE LEVEL MTL = 0.183 MEAN SEA LEVEL MSL = 0.177 North American Vertical Datum NAVD88 = 0.086 MEAN LOW WATER MLW = 0.011 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 7.792 K 9 1918 2.403 2.049 7.507 L 9 1918 2.313 1.959 NO 1 1934 1.571 1.217 B 161 1955 3.734 3.380 C 161 1955 3.508 3.154
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 7 Station ID: 8729868 PUBLICATION DATE: 02/05/2004 Name: PENSACOLA, NAVAL AIR STATION FL NOAA Chart: 11382 Latitude: 30° 20.7' N ( 30.34500) USGS Quad: FORT BARRANCAS Longitude: 87° 16.4' W ( -87.27330) 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.