U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 7 PUBLICATION DATE: 06/27/2001 Station ID: 8723214 SUPERCEDED DATE: 04/21/2003 Name: VIRGINIA KEY, BISCAYNE BAY FLORIDA NOAA Chart: 11465 Latitude: 25° 43.9' N USGS Quad: KEY BISCAYNE Longitude: 80° 9.7' W To reach the tidal bench marks from the intersection of U.S. Route 1 and Rickenbacker Causeway, proceed 5 km (3 mi) east on Rickenbacker Causeway to the entrance of the Rosenstiel School of Marine and Atmospheric Science (Univ. of Miami). The bench marks are located in the vicinity of the concrete pier and on the School grounds. The tide station is located at the outer end of the concrete pier. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 3214 B 1994 DESIGNATION: 872 3214 B MONUMENTATION: Tidal Station disk VM#: 12600 AGENCY: National Ocean Service (NOS) PID#: AH5251 SETTING CLASSIFICATION: Stainless steel rod The primary bench mark is a disk located at the shore end of the pier at the Rosenstiel School of Marine and Atmospheric Science, 38.70 m (127.0 ft) NE of the SE corner of the Alfred C. Glassell Jr. Lab, 7.71 m (25.3 ft) SE of the west corner of a 8.99 m x 7.16 m (29.5 ft x 23.5 ft) satellite dish foundation, 7.44 m (24.4 ft) NW of the west corner of a 1.19 m x 1.19 m (3.9 ft x 3.9 ft) satellite dish foundation, and 2.95 m (9.6 ft) ENE of the centerline of the concrete pier. The bench mark is 6 cm (0.2 ft) below ground level, crimped to a stainless steel rod driven 15.8 m (52 ft) to refusal, and encased in a 6-inch PVC pipe with concrete kickblock. BENCH MARK STAMPING: 3214 A 1994 DESIGNATION: 872 3214 A MONUMENTATION: Tidal Station disk VM#: 12599 AGENCY: National Ocean Service (NOS) PID#: AH5252 SETTING CLASSIFICATION: Concrete pier The bench mark is a disk set flush on the concrete pier of the Rosenstiel School between a bollard and a 6x6-inch wooden bumper, 24.60 m (80.7 ft) south of a lifting boom, 4.15 m (13.6 ft) west of a Rohn tower, and 0.15 m (0.5 ft) east of the west face of the pier.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 7 PUBLICATION DATE: 06/27/2001 Station ID: 8723214 SUPERCEDED DATE: 04/21/2003 Name: VIRGINIA KEY, BISCAYNE BAY FLORIDA NOAA Chart: 11465 Latitude: 25° 43.9' N USGS Quad: KEY BISCAYNE Longitude: 80° 9.7' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: 3214 C 1994 DESIGNATION: 872 3214 C MONUMENTATION: Tidal Station disk VM#: 12601 AGENCY: National Ocean Service (NOS) PID#: AH5250 SETTING CLASSIFICATION: Concrete step The bench mark is a disk set flush in a concrete step at the entrance to the Alfred C. Glassell Jr. Lab, 28.10 m (92.2 ft) SW of the SE corner of the Grosvenor Building, 6.95 m (22.8 ft) east of the NW corner of the lab, and 0.27 m (0.9 ft) SW of the NE corner of the first step of the north entrance to the lab. BENCH MARK STAMPING: 3214 D 1994 DESIGNATION: 872 3214 D MONUMENTATION: Tidal Station disk VM#: 12602 AGENCY: National Ocean Service (NOS) PID#: AH5248 SETTING CLASSIFICATION: Concrete step The bench mark a disk is set flush in a concrete step of the NW entrance to the Operations Building, 24.60 m (80.7 ft) NW of the east corner of the Grosvenor Building, 20.18 m (66.2 ft) west of the NW corner of the Grosvenor Building, and 0.18 m (0.6 ft) east of the east face of the first step to the NE entrance.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 7 PUBLICATION DATE: 06/27/2001 Station ID: 8723214 SUPERCEDED DATE: 04/21/2003 Name: VIRGINIA KEY, BISCAYNE BAY FLORIDA NOAA Chart: 11465 Latitude: 25° 43.9' N USGS Quad: KEY BISCAYNE Longitude: 80° 9.7' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: 3214 E 1994 DESIGNATION: 872 3214 E MONUMENTATION: Tidal Station disk VM#: 12603 AGENCY: National Ocean Service (NOS) PID#: DG7157 SETTING CLASSIFICATION: Stainless steel rod The bench mark is a disk set in the middle of three palm trees in a grassy median in the NW parking area at the Rosenstiel School, 19.99 m (65.6 ft) NE of the NW corner of the Gilbert H. Grosvenor lab, 6.10 m (20.0 ft) north of the centerline of the road leading into school property, and 1.25 m (4.1 ft) NW of a 3-inch diameter light pole. The bench mark is at ground level, crimped to a stainless steel rod driven 18.3 m (60 ft) to refusal, and encased in a 6-inch PVC pipe with concrete kickblock. BENCH MARK STAMPING: 3214 F 1997 DESIGNATION: 872 3214 F MONUMENTATION: Flange-encased Rod VM#: 13456 AGENCY: National Ocean Service (NOS) PID#: AH5246 SETTING CLASSIFICATION: Stainless steel rod in sleeve The bench mark is a flange-encased rod located SE of the main entrance to Rosenstiel School of Marine and Atmospheric Science, 79.00 m (259.2 ft) SE of the NW end of a concrete guardrail, 12.95 m (42.5 ft) north of the NW corner of the concrete building housing public rest rooms, 9.60 m (31.5 ft) SW of the eastbound lane of Rickenbacker Causeway, and 1.19 m (3.9 ft) SW of a 1 m (3 ft) concrete guardrail. The datum point is the top of a stainless steel rod driven 12.2 m (40 ft) to refusal, encased in a no-tox grease sleeve inside a 5-inch PVC pipe and NOS logo cap.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 7 PUBLICATION DATE: 06/27/2001 Station ID: 8723214 SUPERCEDED DATE: 04/21/2003 Name: VIRGINIA KEY, BISCAYNE BAY FLORIDA NOAA Chart: 11465 Latitude: 25° 43.9' N USGS Quad: KEY BISCAYNE Longitude: 80° 9.7' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: 3214 G 1998 DESIGNATION: 872 3214 G MONUMENTATION: Tidal Station disk VM#: 13894 AGENCY: National Ocean Service (NOS) PID#: AH5247 SETTING CLASSIFICATION: Concrete wing wall The bench mark is a disk set flush in the concrete wing wall on the NW side the Rickenbacker Causeway bridge over Bear Cut, next to the property of the Rosenstiel School of Marine and Atmospheric Sciences, 17.12 m (56.2 ft) NE of the corner of the chainlink fence at the NE corner of the school property, 8.85 m (29.0 ft) SSW of the SW metal rail of the bridge, 2.85 m (9.4 ft) NW of a chainlink fence that runs into the bridge, and 0.35 m (1.2 ft) SE of the end of the wing wall. BENCH MARK STAMPING: MI 6 RESET DESIGNATION: 872 3214 MI 6 RESET MONUMENTATION: See descriptive text VM#: 16188 AGENCY: Unknown PID#: AC2151 SETTING CLASSIFICATION: Sidewalk The bench mark is a nail and washer set in the top of the NW end of the SW concrete guard rail to the Bear Cut bridge over Biscayne Bay, 0.30 m (1.0 ft) SW of the SW curb of the bridge, 0.30 m (1.0 ft) SE of the NW end of the base, and 0.30 m (1.0 ft) above the level of the roadway.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 7 PUBLICATION DATE: 06/27/2001 Station ID: 8723214 SUPERCEDED DATE: 04/21/2003 Name: VIRGINIA KEY, BISCAYNE BAY FLORIDA NOAA Chart: 11465 Latitude: 25° 43.9' N USGS Quad: KEY BISCAYNE Longitude: 80° 9.7' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: U 313 1970 DESIGNATION: U 313 MONUMENTATION: Bench Mark disk VM#: 16189 AGENCY: National Geodetic Survey (NGS) PID#: AC2154 SETTING CLASSIFICATION: Concrete base The bench mark is a disk set in the top of the NW corner of the top step of the concrete base for two flagpoles at the City of Miami Marine Stadium along Rickenbacker Causeway, between the exit and entrance drive to the stadium, 0.27 m (0.9 ft) SE of the NW corner of the top step of the base, and 0.46 m (1.5 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 7 PUBLICATION DATE: 06/27/2001 Station ID: 8723214 SUPERCEDED DATE: 04/21/2003 Name: VIRGINIA KEY, BISCAYNE BAY FLORIDA NOAA Chart: 11465 Latitude: 25° 43.9' N USGS Quad: KEY BISCAYNE Longitude: 80° 9.7' W T I D A L D A T U M S Tidal datums at VIRGINIA KEY, BISCAYNE BAY based on: LENGTH OF SERIES: 69 MONTHS TIME PERIOD: February 1994 - December 1999 TIDAL EPOCH: 1960-1978 CONTROL TIDE STATION: 8724580 KEY WEST Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (11/15/1994) = 1.338 MEAN HIGHER HIGH WATER MHHW = 0.701 North American Vertical Datum NAVD88 = 0.683 MEAN HIGH WATER MHW = 0.679 MEAN TIDE LEVEL MTL = 0.359 MEAN SEA LEVEL MSL = 0.352 MEAN LOW WATER MLW = 0.038 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (03/29/1994) = -0.318 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 3214 B 1994 1.985 1.306 3214 A 1994 2.090 1.411 3214 C 1994 1.983 1.304 3214 D 1994 2.163 1.484 3214 E 1994 2.039 1.360 3214 F 1997 2.559 1.880 3214 G 1998 1.724 1.045 MI 6 RESET 3.576 2.897 U 313 1970 2.473 1.794
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 7 PUBLICATION DATE: 06/27/2001 Station ID: 8723214 SUPERCEDED DATE: 04/21/2003 Name: VIRGINIA KEY, BISCAYNE BAY FLORIDA NOAA Chart: 11465 Latitude: 25° 43.9' N USGS Quad: KEY BISCAYNE Longitude: 80° 9.7' 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.