U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 8
Station ID: 9052076 PUBLICATION DATE: 08/11/2017
Name: OLCOTT, LAKE ONTARIO
NY
NOAA Chart: 14806 Latitude: 43° 20.3' N ( 43.33839)
USGS Quad: NEWFANE Longitude: 78° 43.6' W ( -78.72733)
TO REACH THE NOS GAUGING STATION, IN NIAGARA COUNTY, NEW YORK, FROM THE
INTERSECTION OF I-78 AND I-18, PROCEED WEST ON I-18 FOR 0.5 KM (0.30 MI) TO THE
INTERSECTION WITH JACKSON STREET, THEN PROCEED NORTH ON JACKSON STREET FOR 0.16
KM (0.10 MI) TO THE INTERSECTION WITH MAIN STREET, THEN PROCEED WEST ON WEST
MAIN STREET FOR 0.8 KM (0.50 MI) TO THE INTERSECTION WITH CLINTON STREET, THEN
PROCEED NORTH ON CLINTON STREET WHICH TURNS INTO WEST BLUFF RD FOR 0.69 KM, THE
GAUGE HOUSE IS A 3.1 M (10.2 FT)X 6.1 M (20.0 FT) OLD PUMP HOUSE ON THE SOUTH
SIDE OF WEST BLUFF RD.
G R E A T L A K E S B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: WEST 1967
DESIGNATION: 905 2076 WEST
MONUMENTATION: Flange-encased Rod VM#: 12860
AGENCY: National Geodetic Survey IDB PID#: OG0098
SETTING CLASSIFICATION: Galvanized steel pipe in sleeve OPUS PID:
LATITUDE: 43° 20.3' N ( 43.33836) LONGITUDE: 78° 43.6' W ( -78.72728)
The bench mark is a galvanized steel pipe 16.8m (55.1 ft) S of the center of
Bluff Rd, 12.8m (42.0 ft) S of a powerline pole no. 18 with street light, 9.8m
(32.2 ft) NE of the SE corner, 7.9m (25.9 ft) E of the NE corner of the gauging
station building, 0.5m (1.6 ft) below the ground surface, being highest point on
top of a stainless steel plug on top of a 3/8-inch galvanized steel pipe, 4.6m
(15.1 ft) long. The pipe is encased in a 1-inch steel pipe and the mark is
protected by a 6-inch diameter concrete pipe with a pvc sleeve inserted with
aluminum access lid, surrounded with concrete, about 0.5 meters (1.6 ft) below
ground surface.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 8
Station ID: 9052076 PUBLICATION DATE: 08/11/2017
Name: OLCOTT, LAKE ONTARIO
NY
NOAA Chart: 14806 Latitude: 43° 20.3' N ( 43.33839)
USGS Quad: NEWFANE Longitude: 78° 43.6' W ( -78.72733)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: 905 2076 GAGE
MONUMENTATION: Chiseled Square VM#: 12861
AGENCY: IDB PID#: OG0096
SETTING CLASSIFICATION: Rim of manhole OPUS PID:
LATITUDE: 43° 20.3' N ( 43.33833) LONGITUDE: 78° 43.6' W ( -78.72739)
The bench mark is a chiseled square 10.4m (34.1 ft) S of the centerline of W
Bluff Rd, 7.7m (25.3 ft) NE from NE corner of water level gauging station, 6.2m
(20.3 ft) S of utility pole no. 18, on NW corner of a 1.0m (3.3 ft) square steel
manhole rim, being highest point in a 1-inch square cut in top of the rim.
BENCH MARK STAMPING: 2076 F 1979
DESIGNATION: 905 2076 F
MONUMENTATION: Bench Mark disk VM#: 12862
AGENCY: National Ocean Survey (NOS) IDB PID#: AC6291
SETTING CLASSIFICATION: Concrete Culvert OPUS PID:
LATITUDE: 43° 20.1' N ( 43.33556) LONGITUDE: 78° 43.3' W ( -78.72128)
The bench mark is a disk 28.0m (91.9 ft) SW of centerline of intersection of W
Main St and Clinton St, 19.6m (64.3 ft) W of fire hydrant at intersection of W
Main St and Clinton St, 8.7m (28.5 ft) ESE of center of sewer manhole, 0.75m
(2.46 ft) E of a orange witness post, being a standard nos disc located on the E
edge of a 3.0m (9.8 ft) long concrete culvert, stamped 2076 f 1979.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 8
Station ID: 9052076 PUBLICATION DATE: 08/11/2017
Name: OLCOTT, LAKE ONTARIO
NY
NOAA Chart: 14806 Latitude: 43° 20.3' N ( 43.33839)
USGS Quad: NEWFANE Longitude: 78° 43.6' W ( -78.72733)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: A1 1976
DESIGNATION: 905 2076 A 1
MONUMENTATION: Metal Rod VM#: 12863
AGENCY: National Geodetic Survey IDB PID#: OG0298
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 43° 20.3' N ( 43.33856) LONGITUDE: 78° 43.5' W ( -78.72542)
The bench mark is a copper-clad steel rod 19.8m (65.0 ft) SW of the SE corner of
a cream colored car garage, house number 5699, 3.7m (12.1 ft) S of the
centerline of street, 0.9m (3.0 ft) W of a powerline pole no. NM5692-14, 0.5m
(1.6 ft) below the ground surface, being 5/8-inch copper coated steel rod, 5.5m
(18.0 ft) long, and is protected by a 5-in diameter pvc pipe, set in a 12-in
diameter concrete block, with an aluminum access cover stamped a-1 and witness
post.
BENCH MARK STAMPING: MOTTS 1967
DESIGNATION: 905 2076 MOTTS
MONUMENTATION: Metal Rod VM#: 12864
AGENCY: National Geodetic Survey IDB PID#: OG0095
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 43° 20.3' N ( 43.33783) LONGITUDE: 78° 43.4' W ( -78.72275)
The bench mark is a copper-clad steel rod 209.1m (686.0 ft) N of West Bluff St
from Main St near SW corner of attached garage at 1537 W Bluff St, 3.8m (12.5
ft) E of centerline of street, 2.8m (9.2 ft) SW of a 12-inch maple, 1.0m (3.3
ft) W and in line with S face of the garage in a flower bed, 15.2cm below the
ground surface, being highest point on top of a 5/8-inch diameter copper-coated
steel rod, 4.9m (16.1 ft) long and is protected by 5" pvc sleeve with aluminum
access lid.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 8
Station ID: 9052076 PUBLICATION DATE: 08/11/2017
Name: OLCOTT, LAKE ONTARIO
NY
NOAA Chart: 14806 Latitude: 43° 20.3' N ( 43.33839)
USGS Quad: NEWFANE Longitude: 78° 43.6' W ( -78.72733)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: 2076 G 1988
DESIGNATION: 905 2076 G
MONUMENTATION: Bench Mark disk VM#: 12865
AGENCY: National Ocean Service (NOS) IDB PID#: AH6670
SETTING CLASSIFICATION: Wingwall of Culvert OPUS PID:
LATITUDE: 43° 20.3' N ( 43.33883) LONGITUDE: 78° 43.6' W ( -78.72744)
The bench mark is a disk 30.9m (101.4 ft) N of N edge of W Bluff St, 7.5m (24.6
ft) E of concrete breakwall at 5659 W Bluff St, 4.0m (13.1 ft) W of concrete
patio of 5663 W Bluff St, set flush in the top of concrete abutment in E end,
24.4cm W of E edge, abutment is 12.2cm above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 8
Station ID: 9052076 PUBLICATION DATE: 08/11/2017
Name: OLCOTT, LAKE ONTARIO
NY
NOAA Chart: 14806 Latitude: 43° 20.3' N ( 43.33839)
USGS Quad: NEWFANE Longitude: 78° 43.6' W ( -78.72733)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: HEDLEY LDK 1942
DESIGNATION: HEDLEY USLS
MONUMENTATION: Survey disk VM#: 12869
AGENCY: US Lake Survey IDB PID#: OG0102
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 43° 20.3' N ( 43.33850) LONGITUDE: 78° 43.0' W ( -78.71747)
The bench mark is a disk 53.3m (174.9 ft) E of inner end of the entrance pier,
in S face of the hedley boat company building, 6.4m (21.0 ft) N of the
approximate center of Ontario St, 2.4m (7.9 ft) NW of a fire hydrant, 0.3m (1.0
ft) E of the SW corner of the building, 0.9ft (27.4 cm) from corner nearer the
harbor, 2.25ft (0.69 m) above the ground, being horizontal line of cross in
bronze disc set vertical into the concrete foundation.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 8
Station ID: 9052076 PUBLICATION DATE: 08/11/2017
Name: OLCOTT, LAKE ONTARIO
NY
NOAA Chart: 14806 Latitude: 43° 20.3' N ( 43.33839)
USGS Quad: NEWFANE Longitude: 78° 43.6' W ( -78.72733)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: P409 1977
DESIGNATION: P 409
MONUMENTATION: Bench Mark disk VM#: 12871
AGENCY: National Geodetic Survey IDB PID#: OG0297
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 43° 20.2' N ( 43.33600) LONGITUDE: 78° 43.3' W ( -78.72136)
The bench mark is a disk 20.1m (65.9 ft) N of a fire hydrant on S side of W Main
St, 14.3m (46.9 ft) SE of the SE corner of a two story house at 5756 W Main St,
10.7m (35.1 ft) NW of the center of the intersection of Clinton St and W Main
St, 1.5m (4.9 ft) SW of power pole 246. Survey mark is encased in a 5-inch pvc
sleeve with an aluminum access lid and witness post.
BENCH MARK STAMPING: 2076 H 1997
DESIGNATION: 905 2076 H
MONUMENTATION: Metal Rod VM#: 17051
AGENCY: National Geodetic Survey IDB PID#: AH9233
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 43° 20.1' N ( 43.33444) LONGITUDE: 78° 43.2' W ( -78.71942)
The bench mark is a stainless steel rod 59.1m (193.9 ft) W of the NW corner of a
two door corrugated metal boat shed, 26.4m (86.6 ft) S of the centerline of I-18
W, 9.0m (29.5 ft) E of the centerline of the E most entrance road to the harbor
motel and restraunt, 4.8m (15.7 ft) SSE of the witness post, 0.2 ft below ground
surface, being the highest point on top of a stainless steel rod and is
protected by a 5-inch pvc pipe with an aluminum access cover stamped 2076 H
1997.
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 7 of 8
Station ID: 9052076 PUBLICATION DATE: 08/11/2017
Name: OLCOTT, LAKE ONTARIO
NY
NOAA Chart: 14806 Latitude: 43° 20.3' N ( 43.33839)
USGS Quad: NEWFANE Longitude: 78° 43.6' W ( -78.72733)
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 8 of 8
Station ID: 9052076 PUBLICATION DATE: 08/11/2017
Name: OLCOTT, LAKE ONTARIO
NY
NOAA Chart: 14806 Latitude: 43° 20.3' N ( 43.33839)
USGS Quad: NEWFANE Longitude: 78° 43.6' W ( -78.72733)
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/.