U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 7 PUBLICATION DATE: 05/07/1986 Station ID: 8575512 SUPERCEDED DATE: 04/21/2003 Name: ANNAPOLIS (U.S. NAVAL ACADEMY), SEVERN RIVER, CHES MARYLAND NOAA Chart: 12282 Latitude: 38° 59.0' N USGS Quad: ANNAPOLIS Longitude: 76° 28.8' W To reach the tidal bench marks from gate number 8 of the U.S. Naval Academy, proceed SE on Bowyer Road over a bridge to McNair Road, continue NE on McNair Road to Santee Road, proceed on Santee Road for 0.3 mile (0.5 km) to Santee Basin. The bench marks are located within the U.S. Naval Academys grounds. The gage and staff are located on Santee Pier in the Oceanography Laboratory Building. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 7 MONUMENTATION: Survey Disk VM#: 438 AGENCY: PID#: HV0207 SETTING CLASSIFICATION: Concrete Monument The bench mark is located near the northern corner of Luce Hall, 18.2 feet (5.5 m) SW of the edge of the sidewalk on the south side of Santee Road, 14.6 feet (4.5 m) NE of the NE edge of the sidewalk entrance to Luce Hall, 10.6 feet (3.2 m) NW of the ironwood (locust tree), and 9 feet (3 m) SE of the oriental monument, and is set in a concrete monument, 0.2 foot (0.1 m) below ground level. BENCH MARK STAMPING: 4A 1928 MONUMENTATION: Survey Disk VM#: 439 AGENCY: PID#: HV0203 SETTING CLASSIFICATION: Concrete Monument The bench mark is located along the walk parallel to the SW face of Sampson Hall, 100 feet (30 m) NW of the Maryland Ave. curb, and 52 feet (16 m) NE of the Decatur Road curb, and is level with the ground, set flush in the top of a concrete monument.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 7 PUBLICATION DATE: 05/07/1986 Station ID: 8575512 SUPERCEDED DATE: 04/21/2003 Name: ANNAPOLIS (U.S. NAVAL ACADEMY), SEVERN RIVER, CHES MARYLAND NOAA Chart: 12282 Latitude: 38° 59.0' N USGS Quad: ANNAPOLIS Longitude: 76° 28.8' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: 1 1928 MONUMENTATION: Survey Disk VM#: 440 AGENCY: PID#: HV0208 SETTING CLASSIFICATION: Concrete Monument The bench mark is located near the NE face of Luce Hall, 45 feet (14 m) SW of the centerline of Santee Road, 37.7 feet (11.5 m) NW of the Civil War Histor- ical sign, 29 feet (9 m) SE of the centerline of Luce Hall, 26.5 feet (8.1 m) SSW of the fire hydrant, 6 feet (2 m) SW of the SW edge of the sidewalk, and 4.2 feet (1.3 m) NE of the NE face of Luce Hall, and is 0.1 foot (0.03 m) below ground level, set flush in the top of a concrete monument. BENCH MARK STAMPING: 2 1928 MONUMENTATION: Survey Disk VM#: 441 AGENCY: PID#: HV0206 SETTING CLASSIFICATION: Concrete Monument The bench mark is located in the area bounded by Chauvenet Walk, Stribling Walks, Chapel Walks, and Buchanan Road, 202 feet (62 m) SE of the centerline of Chapel Walks, 136 feet (41 m) SW of the centerline of Stribling Walks, and 69.1 feet (21.1 m) NE of the northern edge of Chauvenet Walk, and is 0.2 foot (0.1 m) below ground level, set flush in the top of a concrete monument.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 7 PUBLICATION DATE: 05/07/1986 Station ID: 8575512 SUPERCEDED DATE: 04/21/2003 Name: ANNAPOLIS (U.S. NAVAL ACADEMY), SEVERN RIVER, CHES MARYLAND NOAA Chart: 12282 Latitude: 38° 59.0' N USGS Quad: ANNAPOLIS Longitude: 76° 28.8' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: 3 1928 MONUMENTATION: Survey Disk VM#: 442 AGENCY: PID#: HV0205 SETTING CLASSIFICATION: Concrete Monument The bench mark is located in an area bounded by Stribling Walks, Chauvenet Walk, Chapel Walks, and Maryland Avenue, approximately 200 feet (61 m) NW of the centerline of Chapel Walks, 60.5 feet (18.4 m) SE of a tree between Chapel Walks, 59.4 feet (18.1 m) west from the center of a manhole cover. The bench mark is 0.2 foot (0.1 m) below ground level, and set flush in the top of a concrete monument. BENCH MARK STAMPING: 5 1928 MONUMENTATION: Survey Disk VM#: 443 AGENCY: PID#: HV0204 SETTING CLASSIFICATION: Concrete Monument The bench mark is located in an area bounded by Chauvenet Walk, Blake Road, Maryland Avenue and Chapel Walks, 138 feet (42 m) SE of the SE curb of Maryland Avenue, 101.5 feet (30.9 m) SW of the SW edge of Chauvenet Walk, 65.5 feet (20.0 m) NE of the NE curb of Blake Road, 44 feet (13 m) south of the south edge of an east-west walk, and is level with the ground, set flush in a concrete monument.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 7 PUBLICATION DATE: 05/07/1986 Station ID: 8575512 SUPERCEDED DATE: 04/21/2003 Name: ANNAPOLIS (U.S. NAVAL ACADEMY), SEVERN RIVER, CHES MARYLAND NOAA Chart: 12282 Latitude: 38° 59.0' N USGS Quad: ANNAPOLIS Longitude: 76° 28.8' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5510 A 1978 MONUMENTATION: Survey Disk VM#: 444 AGENCY: PID: SETTING CLASSIFICATION: Stainless Steel Rod The bench mark is located near the SE face of Luce Hall, 20.2 feet (6.2 m) SW of the east corner of Luce Hall, 14.3 feet (4.4 m) NE of the centerline of the SE entrance to Luce Hall, and 1.7 feet (0.5 m) SE of the SE wall of Luce Hall. The bench mark is 0.1 foot (0.03 m) below ground level, crimped to a stainless steel rod driven 42 feet (13 m) to refusal, and encased in a 4-inch PVC pipe and concrete kickblock. BENCH MARK STAMPING: 5510 C 1979 MONUMENTATION: Survey Disk VM#: 445 AGENCY: PID#: AC6863 SETTING CLASSIFICATION: Concrete Foundation The bench mark is located near the west end of Santee Basin, 115.0 feet (35.1 m) east of the centerline of Sims Road, 27.0 feet (8.2 m) south of the centerline of Santee Pier, and 4.4 feet (1.3 m) north of the south edge of the pier, and is set flush in the SE corner of a 5-foot by 5-foot (2 m x 2 m) concrete foundation of a small boat crane. BENCH MARK STAMPING: 5510 D 1979 MONUMENTATION: Survey Disk VM#: 446 AGENCY: PID#: HV8839 SETTING CLASSIFICATION: Concrete Pier Cap The bench mark is located at the NE corner of Santee Pier, 35.8 feet (10.9 m) east of the NE corner of the wooden pump house, 32.0 feet (9.8 m) NE of the NE corner of the oceanographic field laboratory, and 13.0 feet (4.0 m) SE of the northerly set of bollards. The bench mark is set flush in a concrete pier cap.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 7 PUBLICATION DATE: 05/07/1986 Station ID: 8575512 SUPERCEDED DATE: 04/21/2003 Name: ANNAPOLIS (U.S. NAVAL ACADEMY), SEVERN RIVER, CHES MARYLAND NOAA Chart: 12282 Latitude: 38° 59.0' N USGS Quad: ANNAPOLIS Longitude: 76° 28.8' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5510 B 1978 MONUMENTATION: Survey Disk VM#: 1409 AGENCY: PID#: AC6864 SETTING CLASSIFICATION: Stainless Steel Rod The bench mark is located in the immediate vicinity of the NW face of Luce Hall, 22.7 feet (6.9 m) NE of the centerline of the NW entrance to Luce Hall, 11.7 feet (3.6 m) SW of the north corner of Luce Hall, and 1.4 feet (0.4 m) NW of the NW wall of Luce Hall. The bench mark is 0.1 foot (0.03 m) below ground level, crimped to a stainless steel rod driven 36 feet (11 m) to refusal, and encased in a 4-inch PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 7 PUBLICATION DATE: 05/07/1986 Station ID: 8575512 SUPERCEDED DATE: 04/21/2003 Name: ANNAPOLIS (U.S. NAVAL ACADEMY), SEVERN RIVER, CHES MARYLAND NOAA Chart: 12282 Latitude: 38° 59.0' N USGS Quad: ANNAPOLIS Longitude: 76° 28.8' W T I D A L D A T U M S Tidal datums at ANNAPOLIS (U.S. NAVAL ACADEMY), SEVERN RIVER, CHES based on: LENGTH OF SERIES: 18 YEARS TIME PERIOD: 1960-1978 TIDAL EPOCH: 1960-1978 CONTROL TIDE STATION: Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET: HIGHEST OBSERVED WATER LEVEL (08/23/1933) = 6.40 MEAN HIGHER HIGH WATER MHHW = 1.43 MEAN HIGH WATER MHW = 1.17 MEAN TIDE LEVEL MTL = 0.70 MEAN LOW WATER MLW = 0.24 * NATIONAL GEODETIC VERTICAL DATUM NGVD29 = 0.16 LOWEST OBSERVED WATER LEVEL (12/31/1962) = -3.70 * NGVD reference based on elevations published in Quad 380761, 1973, and NOS leveling of 1984. North American Vertical Datum (NAVD88) Bench Mark Elevation Information In FEET above: Stamping or Designation MLLW MHW 7 5.14 3.97 4A 1928 15.46 14.29 1 1928 5.38 4.21 2 1928 20.27 19.10 3 1928 16.70 15.53 5 1928 22.22 21.05 5510 A 1978 5.74 4.57 5510 C 1979 7.70 6.53 5510 D 1979 5.68 4.51 5510 B 1978 5.85 4.68
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 7 PUBLICATION DATE: 05/07/1986 Station ID: 8575512 SUPERCEDED DATE: 04/21/2003 Name: ANNAPOLIS (U.S. NAVAL ACADEMY), SEVERN RIVER, CHES MARYLAND NOAA Chart: 12282 Latitude: 38° 59.0' N USGS Quad: ANNAPOLIS Longitude: 76° 28.8' 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.