U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 8 Station ID: 8729757 PUBLICATION DATE: 04/29/2004 Name: MILTON FL NOAA Chart: 11382 Latitude: 30° 37.6' N ( 30.62670) USGS Quad: MILTON SOUTH Longitude: 87° 2.2' W ( -87.03670) To reach the tidal bench marks from the intersection of Willing Street and U.S. Highway 90, at the west end of the U.S. Highway 90 bridge over the Blackwater River, proceed NW on Willing Street for 0.2 km (0.1 mi) to Broad Street, then proceed north on Broad Street for 0.3 km (0.2 mi) to its intersection with Madison Street, then turn right and proceed east on Madison Street to a lot at the end of the street. The bench marks are along U.S. Highway 90, Broad Street, and near the river's edge from the railroad bridge to Madison Street. The tide gage and staff were on a dock near a grass field at the foot of Madison Street. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 9757 A 1977 DESIGNATION: 872 9757 A TIDAL MONUMENTATION: Tidal Station disk VM#: 10229 AGENCY: National Ocean Survey (NOS) IDB PID#: BG4548 SETTING CLASSIFICATION: Concrete box drain OPUS PID: LATITUDE: 30° 37.6' N ( 30.62670) LONGITUDE: 87° 2.2' W ( -87.03670) The primary bench mark is a disk set in top of the SE corner of a concrete box drain, 13.72 m (45.0 ft) west of the centerline of the driveway leading to the last brick house on the north side of Madison Street, 4.79 m (15.7 ft) north of centerline of Madison Street, and 2.10 m (6.9 ft) south of powerline pole NO 467E305. Note: The disk is damaged.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 8 Station ID: 8729757 PUBLICATION DATE: 04/29/2004 Name: MILTON FL NOAA Chart: 11382 Latitude: 30° 37.6' N ( 30.62670) USGS Quad: MILTON SOUTH Longitude: 87° 2.2' W ( -87.03670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 9757 B 1977 DESIGNATION: 872 9757 B TIDAL MONUMENTATION: Tidal Station disk VM#: 10230 AGENCY: National Ocean Survey (NOS) IDB PID#: BG4547 SETTING CLASSIFICATION: Concrete abutment OPUS PID: LATITUDE: 30° 37.6' N ( 30.62670) LONGITUDE: 87° 2.3' W ( -87.03830) The bench mark is a disk set in top of the south abutment of a small bridge, 0.2 km (0.1 mi) north of the junction of Broad Street and Willing Street, 180 m (590 ft) SSW of bench mark 9757 A 1977, 19.90 m (65.3 ft) north of a 35 mph speed limit sign, and 4.85 m (15.9 ft) east of the centerline of Broad Street.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 8 Station ID: 8729757 PUBLICATION DATE: 04/29/2004 Name: MILTON FL NOAA Chart: 11382 Latitude: 30° 37.6' N ( 30.62670) USGS Quad: MILTON SOUTH Longitude: 87° 2.2' W ( -87.03670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 1 1935 DESIGNATION: TIDAL 1 STA III 93 MONUMENTATION: Tidal Station disk VM#: 10231 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: BG0232 SETTING CLASSIFICATION: Terra cotta tile pipe and concrete OPUS PID: LATITUDE: 30° 37.4' N ( 30.62330) LONGITUDE: 87° 2.1' W ( -87.03500) The bench mark is a disk set in the top of a 0.15 m (0.5 ft) diameter terra cotta tile pipe and concrete, 46 m (150 ft) NE of the intersection of U.S. Highway 90 and Willing Street, 14.94 m (49.0 ft) SW of the south corner of the bridge over Blackwater River, 5.79 m (19.0 ft) SE of the centerline of the highway, 6 m (19 ft) NE of the centerline of Simpson Street, 3.20 m (10.5 ft) west of the west corner of a small brick building, and 0.03 m (0.1 ft) above ground. NOTE: Mark not recovered in 1985.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 8 Station ID: 8729757 PUBLICATION DATE: 04/29/2004 Name: MILTON FL NOAA Chart: 11382 Latitude: 30° 37.6' N ( 30.62670) USGS Quad: MILTON SOUTH Longitude: 87° 2.2' W ( -87.03670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: TT 67 G RESET 1951 1934 DESIGNATION: TT 67 G RESET MONUMENTATION: Survey disk VM#: 10232 AGENCY: US Geological Survey (USGS) IDB PID#: BG0229 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 30° 37.3' N ( 30.62170) LONGITUDE: 87° 2.2' W ( -87.03670) The bench mark is a disk set in the top of a concrete monument, on the lawn of the Santa Rosa County Courthouse, 12.62 m (41.4 ft) SE of the SE curb of U.S. Highway 90, 8.75 m (28.7 ft) NE of the NE curb of Elmira Street, 8.23 m (27.0 ft) WNW of the west corner of the courthouse, 0.76 m (2.5 ft) above the level of the road, and 6 cm (0.2 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 8 Station ID: 8729757 PUBLICATION DATE: 04/29/2004 Name: MILTON FL NOAA Chart: 11382 Latitude: 30° 37.6' N ( 30.62670) USGS Quad: MILTON SOUTH Longitude: 87° 2.2' W ( -87.03670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: V 9 1918 2.316 DESIGNATION: V 9 MONUMENTATION: Bench Mark disk VM#: 10233 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: BG0231 SETTING CLASSIFICATION: Bridge pier OPUS PID: LATITUDE: 30° 37.3' N ( 30.62170) LONGITUDE: 87° 2.0' W ( -87.03330) The bench mark is a disk set in the top of the sest corner of the SW concrete bridge pier foundation for the Louisville and Nashville Railroad bridge over the Blackwater River, 3.35 m (11.0 ft) NW of the NW rail of the tracks, 0.24 m (0.8 ft) east of the west corner of the pier, 12.50 m (41.0 ft) NE of the SW end of the bridge, 2.29 m (7.5 ft) below the track level, and 0.3 km (0.2 mi) SE along Willing Street from the Santa Rosa Count Courthouse.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 8 Station ID: 8729757 PUBLICATION DATE: 04/29/2004 Name: MILTON FL NOAA Chart: 11382 Latitude: 30° 37.6' N ( 30.62670) USGS Quad: MILTON SOUTH Longitude: 87° 2.2' W ( -87.03670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: T 301 1968 DESIGNATION: T 301 MONUMENTATION: Bench Mark disk VM#: 17270 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: BG0236 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 30° 36.9' N ( 30.61500) LONGITUDE: 87° 2.3' W ( -87.03830) The bench mark is a disk set in the top of a concrete monument, 0.6 km (0.4 mi) SW along the railroad from bench mark V 9 1918 2.316, at the crossing of County Road C-191 (Canal Street), 29.81 m (97.8 ft) SSE of the east corner of the railroad station, 14.69 m (48.2 ft) SE of the SE rail of the main track, 14.87 m (48.8 ft) SW of the centerline of Canal Street, 0.3 m (1.0 ft) NW of a fence, 0.6 m (2.0 ft) NE of a witness post, and 3 cm (0.1 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 8 Station ID: 8729757 PUBLICATION DATE: 04/29/2004 Name: MILTON FL NOAA Chart: 11382 Latitude: 30° 37.6' N ( 30.62670) USGS Quad: MILTON SOUTH Longitude: 87° 2.2' W ( -87.03670) T I D A L D A T U M S Tidal datums at MILTON based on: LENGTH OF SERIES: 2 MONTHS TIME PERIOD: August 1977 - September 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 = 0.482 MEAN HIGH WATER MHW = 0.444 MEAN TIDE LEVEL MTL = 0.243 MEAN SEA LEVEL MSL = 0.240 North American Vertical Datum NAVD88 = 0.145 MEAN LOW WATER MLW = 0.042 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 9757 A 1977 1.596 1.152 9757 B 1977 2.532 2.088 NO 1 1935 3.166 2.722 TT 67 G RESET 1951 1934 5.130 4.686 V 9 1918 2.316 0.748 0.304 T 301 1968 2.798 2.354
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 8 of 8 Station ID: 8729757 PUBLICATION DATE: 04/29/2004 Name: MILTON FL NOAA Chart: 11382 Latitude: 30° 37.6' N ( 30.62670) USGS Quad: MILTON SOUTH Longitude: 87° 2.2' W ( -87.03670) 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.