U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
Station ID: 9063085 PUBLICATION DATE: 08/11/2017
Name: TOLEDO, LAKE ERIE
OH
NOAA Chart: 14847 Latitude: 41° 41.6' N ( 41.69356)
USGS Quad: OREGON Longitude: 83° 28.3' W ( -83.47228)
TO REACH THE NOS GAUGE HOUSE, IN TOLEDO, LUCAS COUNTY, OHIO, FROM THE
INTERSECTION OF INTERSTATE 280 AND SUMMIT ST, PROCEED NORTH ON SUMMIT ST FOR
APPROX 5.0 KM (3.10 MI) TO ITS INTERSECTION WITH UNNAMED ENTRANCE RD TO THE BAY
VIEW YACHT BASIN, ON THE EAST SIDE OF SUMMIT ST, THEN PROCEED EAST ON UNMARKED
RD FOR APPROX 0.1 MILE (0.2 KM) TO 2ND UNMARKED RD ON NORTH SIDE OF ROAD, THEN
PROCEED NNE APPROX 0.60 MILE (0.97 KM) ALONG ROAD LEADING TO THE U.S.C.G BASE
AND THE NOS GAUGE HOUSE, WHICH IS LOCATED ON THE NORTH SIDE OF ROAD, ON THE
CORPS OF ENGINEERS PROPERTY ADJACENT TO THE U.S.C.G. PROPERTY.
G R E A T L A K E S B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NAVAL
DESIGNATION: 906 3085 NAVAL
MONUMENTATION: Metal Rod VM#: 12839
AGENCY: National Geodetic Survey IDB PID#: MC0269
SETTING CLASSIFICATION: Galvanized steel rod in sleeve OPUS PID:
LATITUDE: 41° 41.5' N ( 41.69197) LONGITUDE: 83° 28.5' W ( -83.47569)
The bench mark is a galvanized steel rod close to and on W side of old crumbling
brick wall, 15.6 m (51.2 ft) SW of a utility pole with 2 Guy cables, 8.25 m
(27.07 ft) SW of the center of the road, 5.15 m (16.90 ft) NW of a brick wall,
2.40 m (7.87 ft) N of a witness post, and 0.15 m (0.49 ft) below the level of
the road. Note - the mark is a stainless steel plug on the top of a 3/8 inch
galvanized steel pipe 9.45 m (31.00 ft) long. The pipe is enclosed in a 1-inch
diameter steel pipe and the mark is protected by a 5-inch diameter PVC pipe with
an aluminum access cover and witness post, the mark is 0.4 m (1.3 ft) below the
ground surface.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
Station ID: 9063085 PUBLICATION DATE: 08/11/2017
Name: TOLEDO, LAKE ERIE
OH
NOAA Chart: 14847 Latitude: 41° 41.6' N ( 41.69356)
USGS Quad: OREGON Longitude: 83° 28.3' W ( -83.47228)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: CORNER
DESIGNATION: 906 3085 CORNER
MONUMENTATION: Metal Rod VM#: 12840
AGENCY: National Geodetic Survey IDB PID#: MC0274
SETTING CLASSIFICATION: Copper-clad steel rod w/o sleeve OPUS PID:
LATITUDE: 41° 41.6' N ( 41.69350) LONGITUDE: 83° 28.4' W ( -83.47286)
The bench mark is a copper-clad steel rod 37.5 m (123.0 ft) W of the W corner of
the office, 20.42 m (66.99 ft) W of the center of a paved driveway leading to
the corp., 4.56 m (14.96 ft) NE of the center of the road, 0.7 m (2.3 ft) Eof
the W corner a chain-link fence, 0.45 m (1.48 ft) SE of the fence, 0.4 m (1.3
ft) NE of the fence, and 0.3 m (1.0 ft) above the level of the road, mark
protected by PVC sleeve with an aluminum access lid.
BENCH MARK STAMPING:
DESIGNATION: 906 3085 WHSE
MONUMENTATION: Metal Rod VM#: 12841
AGENCY: National Geodetic Survey IDB PID#: MC0277
SETTING CLASSIFICATION: Galvanized steel pipe in sleeve OPUS PID:
LATITUDE: 41° 41.6' N ( 41.69375) LONGITUDE: 83° 28.3' W ( -83.47228)
The bench mark is a galvanized steel pipe 3.7 m (12.1 ft) S of the NE corner of
the office, 2.9 m (9.5 ft) WSW of an 18-inch cottonwood tree, 2.05 m (6.73 ft)
SE of the SE face of the office, 1.25 m (4.10 ft) ENE of the corner of the SE
entrance to the office, 0.2 m (0.7 ft) SE of the SE edge of a sidewalk. Note -
the datum point is the top of a stainless steel plug attached to the top of a
3/8 inch galvanized steel pipe 13.1 m (43.0 ft) long. The pipe is enclosed in a
1-inch diameter steel pipe and is protected by a 5-inch diameter PVC pipe with a
5-inch aluminum access cover, 0.4 m (1.3 ft) below the ground surface.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 9063085 PUBLICATION DATE: 08/11/2017
Name: TOLEDO, LAKE ERIE
OH
NOAA Chart: 14847 Latitude: 41° 41.6' N ( 41.69356)
USGS Quad: OREGON Longitude: 83° 28.3' W ( -83.47228)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: WL 104 1935 MCK
DESIGNATION: 906 3085 WL 104
MONUMENTATION: Survey disk VM#: 12842
AGENCY: USLS IDB PID#: MC0270
SETTING CLASSIFICATION: Foundation OPUS PID:
LATITUDE: 41° 41.5' N ( 41.69233) LONGITUDE: 83° 28.4' W ( -83.47300)
The bench mark is a disk 34.45 m (113.02 ft) SW of the SW edge of a steel
bulkhead on the S side of canal, 29.25 m (95.96 ft) E of the NE corner of the
old recruiting building, 8.8 m (28.9 ft) SE of the center of the road, 0.56 m
(1.84 ft) E of the W edge of a concrete foundation for the (now removed)
Manhattan front range light, and 0.3 m (1.0 ft) above the level of the road.
BENCH MARK STAMPING: WL 105 1935 MCK
DESIGNATION: 906 3085 WL 105
MONUMENTATION: Survey disk VM#: 12843
AGENCY: USLS IDB PID#: MC0267
SETTING CLASSIFICATION: Building OPUS PID:
LATITUDE: 41° 41.6' N ( 41.69258) LONGITUDE: 83° 28.5' W ( -83.47528)
The bench mark is a disk set vertically in the SE face and at the lower E corner
of the concrete window sill and at the E corner of the Toledo Yacht Club
building, 60.8 m (199.5 ft) NE of the center of the road, 37.52 m (123.10 ft) E
of the extended line of the entrance gate, 5.10 m (16.73 ft) SW of the center of
the SE entrance door of the building, 2.50 m (8.20 ft) N of the N edge of
sidewalk in front of yacht club grill, and 0.4 m (1.3 ft) W of a drain pipe and
1.2 m (3.9 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 9063085 PUBLICATION DATE: 08/11/2017
Name: TOLEDO, LAKE ERIE
OH
NOAA Chart: 14847 Latitude: 41° 41.6' N ( 41.69356)
USGS Quad: OREGON Longitude: 83° 28.3' W ( -83.47228)
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 3085 STEEL PILE
MONUMENTATION: See descriptive text VM#: 12845
AGENCY: IDB PID#: MC0272
SETTING CLASSIFICATION: BULKHEAD OPUS PID:
LATITUDE: 41° 41.6' N ( 41.69328) LONGITUDE: 83° 28.4' W ( -83.47372)
The bench mark is 40.2 m (131.9 ft) WSW of the W corner of the Coast Guard
operations building, 16.0 m (52.5 ft) S of the S corner of a Coast Guard boat
house, 12.3 m (40.4 ft) SE of the W corner of the foundation of a small
building, 3.4 m (11.2 ft) W of the W edge of a boat dock. Note - the datum
point is the high point between 2 cut lines on a steel bulkhead.
BENCH MARK STAMPING:
DESIGNATION: 906 3085 STEP
MONUMENTATION: Survey disk VM#: 12846
AGENCY: US Engineers IDB PID#: MC0276
SETTING CLASSIFICATION: Foundation OPUS PID:
LATITUDE: 41° 41.6' N ( 41.69356) LONGITUDE: 83° 28.3' W ( -83.47228)
The bench mark is a disk 41.4 m (134.8 ft) SW of the SW corner of the office,
0.9 m (3 ft) W of the center of the door of the gauge house, and 0.1 m (0.3 ft)
above the level of the ground surface.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
Station ID: 9063085 PUBLICATION DATE: 08/11/2017
Name: TOLEDO, LAKE ERIE
OH
NOAA Chart: 14847 Latitude: 41° 41.6' N ( 41.69356)
USGS Quad: OREGON Longitude: 83° 28.3' W ( -83.47228)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: D 313 1968
DESIGNATION: D 313
MONUMENTATION: Bench Mark disk VM#: 12848
AGENCY: Coast and Geodetic Survey IDB PID#: MC0266
SETTING CLASSIFICATION: Footing OPUS PID:
LATITUDE: 41° 41.7' N ( 41.69458) LONGITUDE: 83° 28.8' W ( -83.48028)
The bench mark is a disk on the N side of unnamed rd in top of a concrete
footing for a street light pole, at the intersection of Summit St and the
unnamed rd, 17.46 m (57.28 ft) SE of the centerline of the street, 4.3 m (14.1
ft) N of the center of the entrance road leading to the Toledo Yacht Club, 0.2 m
(0.7 ft) SE of the NW corner of a concrete footing for a street light pole, 0.1
m (0.3 ft) SWof the utility pole, marked with a witness post.
BENCH MARK STAMPING: 3085 G 1997
DESIGNATION: 906 3085 G
MONUMENTATION: Bench Mark disk VM#: 17044
AGENCY: National Ocean Service (NOS) IDB PID#: AH9237
SETTING CLASSIFICATION: Steel and Concrete bulkhead cap OPUS PID#: AH9237
LATITUDE: 41° 41.6' N ( 41.69283) LONGITUDE: 83° 28.3' W ( -83.47228)
The bench mark is a disk on the SE corner of Coast Guard property, 116.0 ft
(35.4 m) SE of SW corner of Coast Guard housing bldg, 6.0 ft (1.8 m) SW of NE
edge of steel and concrete bulkhead cap, 3.4 ft (1.0 m) NW of the SE edge of the
bulkhead, set flush in steel and concrete bulkhead cap on the E side of the
Coast Guard property along the river'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 6 of 7
Station ID: 9063085 PUBLICATION DATE: 08/11/2017
Name: TOLEDO, LAKE ERIE
OH
NOAA Chart: 14847 Latitude: 41° 41.6' N ( 41.69356)
USGS Quad: OREGON Longitude: 83° 28.3' W ( -83.47228)
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 7 of 7
Station ID: 9063085 PUBLICATION DATE: 08/11/2017
Name: TOLEDO, LAKE ERIE
OH
NOAA Chart: 14847 Latitude: 41° 41.6' N ( 41.69356)
USGS Quad: OREGON Longitude: 83° 28.3' W ( -83.47228)
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/.