U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 9063007 PUBLICATION DATE: 08/11/2017
Name: ASHLAND AVE., NIAGARA FALLS, NIAGARA R.
NY
NOAA Chart: 14822 Latitude: 43° 6.0' N ( 43.09992)
USGS Quad: Longitude: 79° 3.6' W ( -79.05992)
TO REACH THE NOS GAUGING STATION AT ASHLAND AVENUE, NIAGARA FALLS, NEW YORK, ON
THE WESTERLY SIDE OF ROBERT MOSES PARKWAY, BETWEEN EXTENDED CENTERLINES OF
ASHLAND AND ELMWOOD AEVENUES, AT THE LOWER LEVEL OF NIAGARA FALLS DISPOSAL
PLANT,GAUGE HOUSE IS LOCATED NEAR WATERS EDGE.
G R E A T L A K E S B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: POOL 1958
DESIGNATION: 906 3007 POOL
MONUMENTATION: Bench Mark disk VM#: 12758
AGENCY: Army Corps of Engineers IDB PID#: OG0229
SETTING CLASSIFICATION: Concrete gauge house OPUS PID:
LATITUDE: 43° 6.0' N ( 43.09992) LONGITUDE: 79° 3.6' W ( -79.05992)
The bench mark is a disk 7.8 meters (25.6 ft) NE of the NW corner of concrete
lower contact tank, 1.4 meters (4.6 ft) above the doorsill, 18.3 cm E of the E
side of doorway and on south face of the concrete gauge house, being a
horizontal line of cross on bronze disc set into the concrete,set vertical in
the face of the gauge house enclosure to the right of door.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 9063007 PUBLICATION DATE: 08/11/2017
Name: ASHLAND AVE., NIAGARA FALLS, NIAGARA R.
NY
NOAA Chart: 14822 Latitude: 43° 6.0' N ( 43.09992)
USGS Quad: Longitude: 79° 3.6' W ( -79.05992)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: ASH 1976
DESIGNATION: 906 3007 ASH
MONUMENTATION: Bench Mark disk VM#: 12759
AGENCY: National Ocean Survey IDB PID#: OG0342
SETTING CLASSIFICATION: Tank OPUS PID:
LATITUDE: 43° 6.0' N ( 43.09992) LONGITUDE: 79° 3.6' W ( -79.06008)
The bench mark is a disk 4.7 meters (15.4 ft) NW of the NW face of second tank
from the bottom, 1.3 meters (4.3 ft) S of S corner of walkway leading to gage
house, 0.9 meters (3.0 ft) SE of NW face, 0.9 meters (3.0 ft) NE of SW face of
lower contact tank, being highest point over line in center of bronze national
ocean survey disk, set in the top of the last concrete tank landing by the last
set of stairs to the gage house enclosure.
BENCH MARK STAMPING: OUTFALL 1976
DESIGNATION: 906 3007 OUTFALL
MONUMENTATION: Bench Mark disk VM#: 12760
AGENCY: National Ocean Survey IDB PID#: OG0340
SETTING CLASSIFICATION: Concrete shaft OPUS PID:
LATITUDE: 43° 6.0' N ( 43.09950) LONGITUDE: 79° 3.6' W ( -79.06019)
The bench mark is a disk 48.8 meters (160.1 ft) SW of water level gauge house,
14.5 meters (47.6 ft) SE of concrete retaining wall supporting outfall from
pumping station, on top of N corner of a 6' x 7' foot concrete access shaft to
outfall, 10.67 meters from NE face of concrete shaft, 9.75 meters from NW face,
1.3 meters (4.3 ft) above the ground surface, being highest point over cross at
center of bronze disk set into the top of the concrete shaft directly across the
grassy slope from the gauging station.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 9063007 PUBLICATION DATE: 08/11/2017
Name: ASHLAND AVE., NIAGARA FALLS, NIAGARA R.
NY
NOAA Chart: 14822 Latitude: 43° 6.0' N ( 43.09992)
USGS Quad: Longitude: 79° 3.6' W ( -79.05992)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: 3007 E 1977
DESIGNATION: 906 3007 E
MONUMENTATION: Bench Mark disk VM#: 12761
AGENCY: National Ocean Survey IDB PID#: OG0339
SETTING CLASSIFICATION: Concrete tank OPUS PID:
LATITUDE: 43° 6.0' N ( 43.09922) LONGITUDE: 79° 3.6' W ( -79.06033)
The bench mark is a disk 91.4 meters (299.9 ft) S of the water level gauge
house, on top of the upstream set of concrete tanks, 4.8 meters (15.7 ft) SE of
the NW face of tank, 3.0 meters (9.8 ft) NE of the SW face of the tank, 0.7
meters (2.3 ft) SW of the SE corner of the second tank from the top, being
highest point on brass disk set flush into the top of the tank.
BENCH MARK STAMPING: WING 1976
DESIGNATION: 906 3007 WING
MONUMENTATION: Bench Mark disk VM#: 12762
AGENCY: National Ocean Survey IDB PID#: OG0341
SETTING CLASSIFICATION: Top of wing wall OPUS PID:
LATITUDE: 43° 6.0' N ( 43.09947) LONGITUDE: 79° 3.6' W ( -79.06028)
The bench mark is a disk 11.0 meters (36.1 ft) NE of the SW end of concrete
wall, 0.3 meters (1.0 ft) SE of the NW face of the wall, on centerline and 0.3
meters (1.0 ft) from the downriver end of the wing wall, being highest point
over cross at center of bronze disk set into the top of the concrete wall, set
on the top of the N corner of sewage outfall structure going into the river at
the water's edge
Foot Notes:
Above marks are published for informational purposes only. Long term stability
has not been reviewed prior to publication.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 9063007 PUBLICATION DATE: 08/11/2017
Name: ASHLAND AVE., NIAGARA FALLS, NIAGARA R.
NY
NOAA Chart: 14822 Latitude: 43° 6.0' N ( 43.09992)
USGS Quad: Longitude: 79° 3.6' W ( -79.05992)
D E F I N I T I O N S
The International Great Lakes Datum (IGLD) is the vertical height reference
datum used in the Great Lakes/St. Lawrence River System for engineering,
charting, channel dredging, navigation safety, power generation, and water
resource management. It is a coordinated datum between the United States and
Canada that ensures both countries are using the same reference for projects
in the Great Lakes basin. The datum origin, or zero, is defined as Mean Sea
Level at Pointe-au-Pere /Rimouski, Quebec, Canada at the mouth of the
St. Lawrence River. IGLD requires updating approximately every 25-30 years
to account for varying changes in the land surface elevations following the
retreat of the glaciers during the last ice age, referred to as Glacial
Isostatic Adjustment (GIA). The current IGLD 1985 was implemented in 1992.
IGLD 1985 uses dynamic heights as the vertical reference standard and lakes
station water level elevations are adjusted to provide a level geopotential
plane for lake level reference.
Dynamic height is the potential difference along the plumbline between the
vertical datum and a point of interest divided by a constant value of
gravity. In Canada and USA, the constant value of gravity is the
"normal gravity" on the ellipsoid at latitude 45° (9.806199 ms-2). Dynamic
heights have no geometric meaning. They are mainly used for the management
of water in large lakes, rivers and channels. The surface of a lake has a
constant dynamic height if undisturbed by currents, winds, atmospheric
pressure, etc.
The Hydraulic Corrector (HC) is the difference in the long term water level
mean between Subordinate and Master station. The difference (HC) is
subtracted algebraically at the subordinate gauge referencing the same
elevation as the master station. Thus all water levels on a given lake can
be referenced to the same lakes LWD/Chart Datum reference elevation.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 9063007 PUBLICATION DATE: 08/11/2017
Name: ASHLAND AVE., NIAGARA FALLS, NIAGARA R.
NY
NOAA Chart: 14822 Latitude: 43° 6.0' N ( 43.09992)
USGS Quad: Longitude: 79° 3.6' W ( -79.05992)
D E F I N I T I O N S
A Master Stations is the control point for determining water level
elevations on a particular lake of the Great Lakes. Since water surfaces
of the Great Lakes are considered to be at geopotential equal, all Mean
Water Level (MWL) values for stations on a particular lake should have the
same dynamic height. Therefore, all subordinate water level station MWL
values are adjusted to match the dynamic water level elevation of the Master
Station through the use of a hydraulic corrector. In the establishment of
International Great Lakes Datum (1985) the connecting waterways station
dynamic elevations were calculated through the use of a linear regression
while constraining the end points of the regression with the dynamic
elevations of the corresponding master station above and below the
connecting channel.
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 toNAVD88 are available from NGS through the World Wide
Web at National Geodetic Survey.
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/.