U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 6 PUBLICATION DATE: 07/26/2002 Station ID: 8639348 SUPERCEDED DATE: 04/21/2003 Name: MONEY POINT, S. BR. ELIZABETH RIVER VIRGINIA NOAA Chart: 12253 Latitude: 36° 46.7' N USGS Quad: NORFOLK SOUTH Longitude: 76° 18.1' W To reach the tidal bench marks from the Post Office in Chesapeake, Virginia, proceed north on Battlefield Boulevard for 0.8 km (0.5 mi), then continue west on Interstate 64 toward Suffolk to Exit 291A for I-664 toward Norfolk, then take I-664 to Freeman Avenue (Exit 3), turn left at the light and continue south on Freeman Avenue for 1.1 km (0.7 mi) to Buell Street, then left on Buell Street for 0.5 km (0.3 mi) to the Elizabeth River Terminal on the right. The bench marks are on the terminal property and the tide gage is located on the end of pier No. 2. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 9348 E 1997 DESIGNATION: 863 9348 E MONUMENTATION: Flange-encased Rod VM#: 13895 AGENCY: National Ocean Service (NOS) PID: SETTING CLASSIFICATION: Stainless steel rod in sleeve The primary bench mark is located near an oil storage tank in a grassy area, 60.50 m (198.5 ft) NNE of Warehouse No. 1, 24.29 m (79.7 ft) ESE of the SE corner of the office/break room, 16.09 m (52.8 ft) south of the SE corner of the electrical shop, 2.01 m (6.6 ft) NE of a witness post, and 1.80 m (5.9 ft) south of a telephone pole. The datum point is the top of a stainless steel rod driven 7.6 m (25 ft) to refusal, in a grease-filled sleeve extending to a depth of 0.91 m (3 ft), and encased inside a 5-inch logo cap. BENCH MARK STAMPING: 9348 A 1997 DESIGNATION: 863 9348 A MONUMENTATION: Tidal Station disk VM#: 13896 AGENCY: National Ocean Service (NOS) PID: SETTING CLASSIFICATION: Warehouse foundation The bench mark is a disk set in the concrete foundation on the west side of Warehouse No. 1, 39.01 m (128.0 ft) NE of the SE corner of Warehouse No. 2, 15.61 m (51.2 ft) SSE of the SE corner of the main switch building, 15.61 m (51.2 ft) NNW of the inside corner of Warehouse No. 1, 1.10 m (3.6 ft) NE of the NW corner of Warehouse No. 1, and 0.30 m (1.0 ft) above ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 6 PUBLICATION DATE: 07/26/2002 Station ID: 8639348 SUPERCEDED DATE: 04/21/2003 Name: MONEY POINT, S. BR. ELIZABETH RIVER VIRGINIA NOAA Chart: 12253 Latitude: 36° 46.7' N USGS Quad: NORFOLK SOUTH Longitude: 76° 18.1' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: 9348 B 1997 DESIGNATION: 863 9348 B MONUMENTATION: Tidal Station disk VM#: 13897 AGENCY: National Ocean Service (NOS) PID: SETTING CLASSIFICATION: Concrete foundation The bench mark is a disk set in the concrete foundation of the railroad train boxcar scale SE of Warehouse No. 6, 43.19 m (141.7 ft) NE of the NE corner of a warehouse, 41.51 m (136.2 ft) NNE of the NW corner of Warehouse No. 2, 13.41 m (44.0 ft) NE of the boxcar scale, 13.01 m (42.7 ft) SE of the SE corner of Warehouse No. 6, and 0.79 m (2.6 ft) SW of the SW corner of the scalehouse building. BENCH MARK STAMPING: 9348 C 1997 DESIGNATION: 863 9348 C MONUMENTATION: Tidal Station disk VM#: 13898 AGENCY: National Ocean Service (NOS) PID: SETTING CLASSIFICATION: Concrete foundation The bench mark is a disk set in the concrete foundation of the truck scale, 45.99 m (150.9 ft) SW of the SW corner of Warehouse No. 9, 22.40 m (73.5 ft) WNW of the SW corner of the office/locker room building, 19.69 m (64.6 ft) east of the NE corner of the mechanic's building, and 1.49 m (4.9 ft) north of the NW corner of the truck scale building.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 6 PUBLICATION DATE: 07/26/2002 Station ID: 8639348 SUPERCEDED DATE: 04/21/2003 Name: MONEY POINT, S. BR. ELIZABETH RIVER VIRGINIA NOAA Chart: 12253 Latitude: 36° 46.7' N USGS Quad: NORFOLK SOUTH Longitude: 76° 18.1' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: 9348 D 1997 DESIGNATION: 863 9348 D MONUMENTATION: Flange-encased Rod VM#: 13899 AGENCY: National Ocean Service (NOS) PID: SETTING CLASSIFICATION: Stainless steel rod in sleeve The bench mark is located near the Buell Street entrance to the Elizabeth River Terminal, 30.60 m (100.4 ft) NE of the NE corner of the main office building, 28.80 m (94.5 ft) south of Pratt Street, 12.71 m (41.7 ft) WNW of Buell Street, and 1.19 m (3.9 ft) SE of a witness post. The datum point is 0.09 m (0.3 ft) below ground, being the top of a stainless steel rod driven 7.6 m (25 ft) to refusal, in a grease-filled sleeve extending to a depth of 0.91 meter (3 ft), and encased in a 5-inch logo cap. BENCH MARK STAMPING: DRAW NO 1 1912 1959 DESIGNATION: DRAW RM 1 MONUMENTATION: Reference Mark disk VM#: 13900 AGENCY: US Coast & Geodetic Survey (USC&GS) PID#: FX0345 SETTING CLASSIFICATION: Concrete railroad abutment The bench mark is a disk set in the north edge of the east abutment at the NE corner of the Norfolk and Western Railway draw bridge (No 7) over the Southern Branch of the Elizabeth River, next to the U.S. Highway 460/13 Gilmerton Bridge, 28.93 m (94.9 ft) east of the Gilmerton draw span, 1.8 m (6 ft) south of the north edge of the abutment, 1.10 m (3.6 ft) north of the north rail of the railroad tracks, and 0.46 m (1.5 ft) below the track.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 6 PUBLICATION DATE: 07/26/2002 Station ID: 8639348 SUPERCEDED DATE: 04/21/2003 Name: MONEY POINT, S. BR. ELIZABETH RIVER VIRGINIA NOAA Chart: 12253 Latitude: 36° 46.7' N USGS Quad: NORFOLK SOUTH Longitude: 76° 18.1' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: DRAW NO 2 1912 1959 DESIGNATION: DRAW RM 2 MONUMENTATION: Reference Mark disk VM#: 13901 AGENCY: US Coast & Geodetic Survey (USC&GS) PID#: FX0346 SETTING CLASSIFICATION: Concrete bridge abutment The bench mark is a disk set in top of the south end of the back wall of the east concrete abutment of the Gilmerton Bridge over the Southern Branch of the Elizabeth River, 18.65 m (61.2 ft) north of the Gilmerton draw span, and 6.55 m (21.5 ft) south of the centerline of U.S. Highway 460/13.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 6 PUBLICATION DATE: 07/26/2002 Station ID: 8639348 SUPERCEDED DATE: 04/21/2003 Name: MONEY POINT, S. BR. ELIZABETH RIVER VIRGINIA NOAA Chart: 12253 Latitude: 36° 46.7' N USGS Quad: NORFOLK SOUTH Longitude: 76° 18.1' W T I D A L D A T U M S Tidal datums at MONEY POINT, S. BR. ELIZABETH RIVER based on: LENGTH OF SERIES: 4 YEARS TIME PERIOD: December 1997 - November 2001 TIDAL EPOCH: 1960-1978 CONTROL TIDE STATION: 8638610 SEWELLS POINT, HAMPTON ROADS Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (02/05/1998) = 2.309 MEAN HIGHER HIGH WATER MHHW = 0.993 MEAN HIGH WATER MHW = 0.928 North American Vertical Datum NAVD88 = 0.673 MEAN SEA LEVEL MSL = 0.488 MEAN TIDE LEVEL MTL = 0.485 MEAN LOW WATER MLW = 0.042 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (01/02/1998) = -0.696 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 9348 E 1997 3.527 2.599 9348 A 1997 3.054 2.126 9348 B 1997 3.089 2.161 9348 C 1997 3.308 2.380 9348 D 1997 2.152 1.224 DRAW NO 1 1912 1959 4.263 3.335 DRAW NO 2 1912 1959 5.183 4.255
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 6 PUBLICATION DATE: 07/26/2002 Station ID: 8639348 SUPERCEDED DATE: 04/21/2003 Name: MONEY POINT, S. BR. ELIZABETH RIVER VIRGINIA NOAA Chart: 12253 Latitude: 36° 46.7' N USGS Quad: NORFOLK SOUTH Longitude: 76° 18.1' 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.