U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 6 Station ID: 8518995 PUBLICATION DATE: 12/05/2011 Name: ALBANY, HUDSON RIVER NY NOAA Chart: 12348 Latitude: 42° 39.0' N ( 42.65000) USGS Quad: TROY SOUTH Longitude: 73° 44.8' W ( -73.74670) To reach the tidal bench marks from the junction of Broadway and Quay Street in Albany, proceed NE on Quay Street for 0.8 km (0.5 mi) to the NE end of the Albany Riverside Pumping Station property. The bench marks are along Interstate Highway 787, along the bike path in Riverfront Preserve Erastus Corning Second Park, and near an air conditioning plant. The tide gage and electric tape gage were located in the COE/USGS water level station, about 152 m (500 ft) north of the air conditioning plant. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 8995 A 1981 DESIGNATION: 851 8995 A TIDAL MONUMENTATION: Tidal Station disk VM#: 2399 AGENCY: National Ocean Survey (NOS) IDB PID#: MZ1409 SETTING CLASSIFICATION: Concrete foundation OPUS PID: LATITUDE: 42° 39.0' N ( 42.65000) LONGITUDE: 73° 44.9' W ( -73.74830) The primary bench mark is a disk set in a concrete foundation at the SE corner of the COE/USGS water level station, 61 m (200 ft) NE of a small abandoned brick building with a red tile roof, 1.22 m (4.0 ft) SE of the center of the station's entrance door, 0.82 m ( 2.7 ft) north of the north corner of the top concrete step of the SW entrance of the building, and 0.76 m (2.5 ft) above the ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 6 Station ID: 8518995 PUBLICATION DATE: 12/05/2011 Name: ALBANY, HUDSON RIVER NY NOAA Chart: 12348 Latitude: 42° 39.0' N ( 42.65000) USGS Quad: TROY SOUTH Longitude: 73° 44.8' W ( -73.74670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 8995 B 1981 DESIGNATION: 851 8995 B TIDAL MONUMENTATION: Tidal Station disk VM#: 2400 AGENCY: National Ocean Survey (NOS) IDB PID#: MZ1408 SETTING CLASSIFICATION: Concrete foundation OPUS PID: LATITUDE: 42° 39.0' N ( 42.65000) LONGITUDE: 73° 44.9' W ( -73.74830) The bench mark is a disk set in concrete in the NW extended foundation of the SW entrance of a small abandoned brick building with a red tile roof, 61 m (200 ft) SW of the COE/USGS water level station, 6 m (20 ft) NW of the approximate river bank, 1.65 m (5.4 ft) SE of the west corner of the building, and 0.61 m (2.0 ft) above the ground. BENCH MARK STAMPING: 8995 C 1981 DESIGNATION: 851 8995 C TIDAL MONUMENTATION: Tidal Station disk VM#: 2401 AGENCY: National Ocean Survey (NOS) IDB PID#: MZ1410 SETTING CLASSIFICATION: Concrete retaining wall OPUS PID: LATITUDE: 42° 38.9' N ( 42.64830) LONGITUDE: 73° 44.9' W ( -73.74830) The bench mark is a disk set in the top of a concrete retaining wall near the NE end of an approach ramp to Interstate Highway 787 directly across Quay Street from the NE side of the Albany Riverside Pumping Station property, 9.75 m (32.0 ft) NE of an aluminum lamp post on the retaining wall, 5.18 m (17.0 ft) NW of the centerline of Quay Street, 0.67 m (2.2 ft) SW of the NE end of the retaining wall, and 0.91 m (3.0 ft) above the street.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 6 Station ID: 8518995 PUBLICATION DATE: 12/05/2011 Name: ALBANY, HUDSON RIVER NY NOAA Chart: 12348 Latitude: 42° 39.0' N ( 42.65000) USGS Quad: TROY SOUTH Longitude: 73° 44.8' W ( -73.74670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 851 8995 D 1982 DESIGNATION: 851 8995 D TIDAL MONUMENTATION: Bench Mark disk VM#: 2402 AGENCY: National Geodetic Survey (NGS) IDB PID#: MZ1406 SETTING CLASSIFICATION: Retaining wall OPUS PID: LATITUDE: 42° 39.3' N ( 42.65500) LONGITUDE: 73° 44.6' W ( -73.74330) The bench mark is a disk set in the top of the SW end of a curved concrete retaining wall along the west bank of the Hudson River, 85 m (279 ft) ENE of the center of the entrance and exit of the parking area of the park, 32 m (105 ft) SSE of the SE corner of the west stone brick abutment of the railroad bridge over the river, 5.70 m (18.7 ft) SW of an aluminum lamp post on the retaining wall, 3.20 m (10.5 ft) SE of the SE face of a metal guardrail on the NW side of the paved bike path, 1.43 m (4.7 ft) NE of a witness post, 0.52 m (1.7 ft) NE of the SW end of the concrete retaining wall, and 0.61 m (2.0 ft) above the bike path.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 6 Station ID: 8518995 PUBLICATION DATE: 12/05/2011 Name: ALBANY, HUDSON RIVER NY NOAA Chart: 12348 Latitude: 42° 39.0' N ( 42.65000) USGS Quad: TROY SOUTH Longitude: 73° 44.8' W ( -73.74670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 851 8995 E 1982 DESIGNATION: 851 8995 E TIDAL MONUMENTATION: Bench Mark disk VM#: 2403 AGENCY: National Geodetic Survey (NGS) IDB PID#: MZ1407 SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 42° 39.1' N ( 42.65170) LONGITUDE: 73° 44.8' W ( -73.74670) The bench mark is a disk set at the SE end of the NE stone block retaining wall of the bridge across a pond in the park, about 0.24 km (0.15 mi) NE of the pumping station property, 14 m (46 ft) NW of the centerline of the bike path, 2.13 m (7.0 ft) NE of the center of the bridge, 0.61 m (2.0 ft) SE of the SE face of the NE stone block retaining wall of the bridge, and 0.61 m (2.0 ft) south of a witness post. The bench mark is set about level with the bike path, crimped to the top of a stainless steel rod driven 7.0 m (23 ft) to refusal, and encased in a pipe. BENCH MARK STAMPING: 851 8995 F 1982 DESIGNATION: 851 8995 F TIDAL MONUMENTATION: Flange-encased Rod VM#: 2404 AGENCY: National Geodetic Survey (NGS) IDB PID#: MZ1411 SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID: LATITUDE: 42° 38.9' N ( 42.64830) LONGITUDE: 73° 45.0' W ( -73.75000) The bench mark is a flange-encased rod set near the air conditioning plant, on the NE side of a chain link fence running NW/SE, 8.99 m (29.5 ft) SE of the SE curb of Quay Street, 2.83 m (9.3 ft) SE of the SE face of a stone block wall on the NW side of the Albany Riverside Pumping Station property, 2.74 m (9.0 ft) ENE of the NW end chain link fence post, and 0.61 m (2.0 ft) NE of the chain link fence. The datum point is the top of a stainless steel rod driven 7.9 m (26 ft) to substantial resistance, in a sleeve extending to a depth of 6.1 m (20 ft), and encased in a pipe with a an NGS logo cover.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 6 Station ID: 8518995 PUBLICATION DATE: 12/05/2011 Name: ALBANY, HUDSON RIVER NY NOAA Chart: 12348 Latitude: 42° 39.0' N ( 42.65000) USGS Quad: TROY SOUTH Longitude: 73° 44.8' W ( -73.74670) T I D A L D A T U M S Tidal datums at ALBANY, HUDSON RIVER based on: LENGTH OF SERIES: 5 YEARS TIME PERIOD: July 1982 - June 1987 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8518750 THE BATTERY, NEW YORK HARBOR Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (05/31/1984) = 3.376 MEAN HIGHER HIGH WATER MHHW = 1.702 MEAN HIGH WATER MHW = 1.586 MEAN SEA LEVEL MSL = 0.869 MEAN TIDE LEVEL MTL = 0.827 North American Vertical Datum NAVD88 = 0.550 MEAN LOW WATER MLW = 0.067 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (03/08/1986) = -1.062 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 8995 A 1981 4.732 3.146 8995 B 1981 5.229 3.643 8995 C 1981 7.566 5.980 851 8995 D 1982 5.355 3.769 851 8995 E 1982 3.485 1.899 851 8995 F 1982 6.654 5.068
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 6 Station ID: 8518995 PUBLICATION DATE: 12/05/2011 Name: ALBANY, HUDSON RIVER NY NOAA Chart: 12348 Latitude: 42° 39.0' N ( 42.65000) USGS Quad: TROY SOUTH Longitude: 73° 44.8' W ( -73.74670) 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.