U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 8
Station ID: 9076027 PUBLICATION DATE: 08/11/2017
Name: WEST NEEBISH ISLAND, ST. MARYS RIVER
MI
NOAA Chart: Latitude: 46° 17.0' N ( 46.28331)
USGS Quad: Longitude: 84° 12.3' W ( -84.20500)
TO REACH THE NOS GAUGE STATION, IN BRUCE TOWNSHIP, BARBEAU, CHIPPEWA COUNTY,
MICHIGAN, FROM THE INTERSECTION OF FIFTEEN MILE ROAD AND THE POST OFFICE IN
BARBEAU, PROCEED EAST ON FIFTEEN MILE ROAD FOR 4.50 KM (2.80 MI) TO THE
INTERSECTION WITH SCENIC ROAD (RIVER RD), THEN PROCEED SOUTH ON SCENIC RD (RIVER
RD) FOR 1.10 KM (0.70 MI) TO AN ASPHALT RD ON THE EAST SIDE OF SCENIC DR RD,
LEADING TO THE NEEBISH ISLAND FERRY LANDING, THEN PROCEED ENE ALONG ASPHALT RD
FOR 0.24 KM (0.15 MI) TO FERRY LANDING. PROCEED ACROSS ST MARYS RIVER ON FERRY
TO NEEBISH ISLAND. THE NOAA WATER LEVEL GAUGING STATION IS LOCATED NEAR THE
WATERS EDGE ON THE SE AREA OF THE FERRY LANDING AND BOAT RAMP.
G R E A T L A K E S B E N C H M A R K S
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 8
Station ID: 9076027 PUBLICATION DATE: 08/11/2017
Name: WEST NEEBISH ISLAND, ST. MARYS RIVER
MI
NOAA Chart: Latitude: 46° 17.0' N ( 46.28331)
USGS Quad: Longitude: 84° 12.3' W ( -84.20500)
G R E A T L A K E S B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: E 297 1983
DESIGNATION: E 297
MONUMENTATION: Metal Rod VM#: 18381
AGENCY: National Geodetic Survey IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod w/o sleeve OPUS PID:
LATITUDE: 46° 17.3' N ( 46.28872) LONGITUDE: 84° 12.6' W ( -84.20997)
The bench mark is a stainless steel rod set in the are of the old ferry landing,
6.36m (20.87 ft) N of the approximate center of Fifteen Mile Rd, 2.42m (7.94 ft)
W of the W face of a residence, set 0.05m (0.16 ft) below the ground, being the
top of a stainless steel rod driven 3.05m (10.01 ft) and encased in a 5-inch NGS
logo cap.
BENCH MARK STAMPING: WEST NEEBISH 2006
DESIGNATION: 907 6027 WEST NEEBISH
MONUMENTATION: Bench Mark disk VM#: 18377
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: Rohn tower base OPUS PID:
LATITUDE: 46° 17.1' N ( 46.28467) LONGITUDE: 84° 12.6' W ( -84.20981)
The bench mark is a disk set in Rohn tower base at the NOAA water level gauging
station located near the water's edge on SE area of ferry landing and boat ramp,
48.29 meters (158.43 ft) WSW of an unmarked power pole with a transformer, 10.33
meters (33.89 ft) N of the approx centerline of a paved boat ramp, 6.04 meters
(19.82 ft) SSE of the SE corner of a white painted block utility bldg, 1.04
meters (3.41 ft) SE of the SE corner of the NOS water level gauging station.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 8
Station ID: 9076027 PUBLICATION DATE: 08/11/2017
Name: WEST NEEBISH ISLAND, ST. MARYS RIVER
MI
NOAA Chart: Latitude: 46° 17.0' N ( 46.28331)
USGS Quad: Longitude: 84° 12.3' W ( -84.20500)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: 6027 C 2006
DESIGNATION: 907 6027 C
MONUMENTATION: Bench Mark disk VM#: 18378
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 46° 17.1' N ( 46.28536) LONGITUDE: 84° 12.5' W ( -84.20767)
The bench mark is a disk on the N side of Ferry Rd at its intersection with
unmarked dirt service drive, 8.00 meters (26.25 ft) WNW of the centerline of
ferry rd, 3.45 meters (11.32 ft) S of power pole WQC TMC SPSKH 3-90 5-40, 3.10
meters (10.17 ft) SSE of the centerline of an unmarked dirt service dr, 0.27
meters (0.89 ft) S of a witness post. The BM is set in the top of a 5.5o' x
2.0' deep concrete monument encased in 2.0 ft (0.6 m) diameter PVC pipe.
BENCH MARK STAMPING: 907 6027 D 2006
DESIGNATION: 907 6027 D
MONUMENTATION: Flange-encased Rod VM#: 18379
AGENCY: National Geodetic Survey IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID:
LATITUDE: 46° 17.3' N ( 46.28822) LONGITUDE: 84° 12.5' W ( -84.20786)
The bench mark is a flange-encased rod set on the N side of Fifteen Mile Rd, on
E side of private residence (house number 7487) driveway, 23.41 m (76.80 ft) E
of an unmarked power pole, 15.50m (50.85 ft) W of an unmarked power pole with
transformer and guy wires, 6.39m (20.96 ft) N of the centerline of fifteen mile
rd, 0.45m (1.48 ft) S of a witness post set in the concrete monument and is
protected by a 5 inch PVC sleeve with alum access lid and witness post, encased
in a concrete filled monument 5.50' x 2.0' encased by a PVC pipe.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 8
Station ID: 9076027 PUBLICATION DATE: 08/11/2017
Name: WEST NEEBISH ISLAND, ST. MARYS RIVER
MI
NOAA Chart: Latitude: 46° 17.0' N ( 46.28331)
USGS Quad: Longitude: 84° 12.3' W ( -84.20500)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: DOCK USLS 69
DESIGNATION: 907 6027 DOCK
MONUMENTATION: Reference Mark disk VM#: 18380
AGENCY: US Lake Survey IDB PID#: RJ0186
SETTING CLASSIFICATION: Boulder OPUS PID:
LATITUDE: 46° 17.3' N ( 46.28850) LONGITUDE: 84° 12.6' W ( -84.21006)
The bench mark is a disk set in boulder on S side of fifteen mile rd, in the
area of the old ferry landing, 13.40 meters (43.96 ft) SSW of the approx center
of Fifteen Mile Rd, 1.29 meters (4.23 ft) W of unmarked power pole with
transformer and guy wires, 0.68 meters E of witness post, set in the top of a 3'
x 2' embedded boulder slightly above ground level, marked by a witness post.
BENCH MARK STAMPING: C6W 008 1988
DESIGNATION: 83 C6W 008
MONUMENTATION: Triangulation Station disk VM#: 18382
AGENCY: IDB PID#: RJ1308
SETTING CLASSIFICATION: Metal rod driven into the ground OPUS PID:
LATITUDE: 46° 17.3' N ( 46.28872) LONGITUDE: 84° 12.6' W ( -84.21061)
The bench mark is a disk in the area of the old ferry landing, on the W side of
old unmarked gravel ferry landing entrance drive, 21.49 m (70.51 ft) S of
flagpole behind residence number 14990, 6.04 m (19.82 ft) NW of the center of an
unmarked gravel drive, 2.44 m (8.01 ft) NE of unmarked power pole with guy wire,
marked with witness post and encased with concrete.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 8
Station ID: 9076027 PUBLICATION DATE: 08/11/2017
Name: WEST NEEBISH ISLAND, ST. MARYS RIVER
MI
NOAA Chart: Latitude: 46° 17.0' N ( 46.28331)
USGS Quad: Longitude: 84° 12.3' W ( -84.20500)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: 1952 TT5 EV
DESIGNATION: TT5 EV
MONUMENTATION: Bench Mark disk VM#: 22136
AGENCY: US Geological Survey IDB PID#:
SETTING CLASSIFICATION: Set in the top of a concrete monument OPUS PID:
LATITUDE: 46° 17.3' N ( 46.28797) LONGITUDE: 84° 11.6' W ( -84.19358)
The bench mark is a disk set in a concrete monument 25.2m (82.7 ft) SSE of the
NW corner of house number 8126 on 15 Mile Rd, 6.9m (22.6 ft) West of a telephone
junction box number 10950, 6.1m (20 ft) South of the centerline of 15 mile rd,
15.2 cm (6.0 inches) above the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 8
Station ID: 9076027 PUBLICATION DATE: 08/11/2017
Name: WEST NEEBISH ISLAND, ST. MARYS RIVER
MI
NOAA Chart: Latitude: 46° 17.0' N ( 46.28331)
USGS Quad: Longitude: 84° 12.3' W ( -84.20500)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: SALE USLS
MONUMENTATION: Bolt VM#: 22137
AGENCY: IDB PID#:
SETTING CLASSIFICATION: OPUS PID:
LATITUDE: 46° 17.3' N ( 46.28833) LONGITUDE: 84° 11.4' W ( -84.18944)
The bench mark is the high point on top of a 0.5 inch bolt set in top of a 5' by
6' boulder, 32m (105.0 ft) South of the approximate center of the road, 21.7m
(71.2 ft) West of the SE corner of the big buck ranch clubhouse, 18.4m (60.4 ft)
West of utility pole number NE2 18 A, is 0.91m above the ground.
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: 9076027 PUBLICATION DATE: 08/11/2017
Name: WEST NEEBISH ISLAND, ST. MARYS RIVER
MI
NOAA Chart: Latitude: 46° 17.0' N ( 46.28331)
USGS Quad: Longitude: 84° 12.3' W ( -84.20500)
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: 9076027 PUBLICATION DATE: 08/11/2017
Name: WEST NEEBISH ISLAND, ST. MARYS RIVER
MI
NOAA Chart: Latitude: 46° 17.0' N ( 46.28331)
USGS Quad: Longitude: 84° 12.3' W ( -84.20500)
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/.