U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
Station ID: 9087072 PUBLICATION DATE: 08/11/2017
Name: STURGEON BAY CANAL, LAKE MICHIGAN
WI
NOAA Chart: 14919 Latitude: 44° 47.7' N ( 44.79558)
USGS Quad: Longitude: 87° 18.9' W ( -87.31433)
TO REACH THE NOS GAUGING STATION IN STURGEON BAY, DOOR COUNTY, WISCONSIN, FROM
THE INTERSECTION OF HWY 42/57 AND UTAH ROAD, PROCEED EAST ON UTAH ROAD FOR
APPROX 0.48 KM (0.30 MI) TO THE INTERSECTION WITH COLE ROAD, THEN PROCEED SOUTH
ON COLE RD FOR APPROX 0.40 KM (0.25 MI) TO THE INTERSECTION WITH CANAL RD, THEN
PROCEED ESE ON CANAL RD FOR APPROX 4.18 KM (2.60 MI) TO THE USCG PROPERTY, CANAL
RD DEAD ENDS INTO THE USCG PROPERTY, THE NOS GAUGE HOUSE IS LOCATED ON THE
SOUTHWEST SIDE OF THE MAIN COAST GUARD BUILDING WHICH IS NEAR THE EDGE OF THE
CANAL.
G R E A T L A K E S B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: GARAGE
DESIGNATION: 908 7072 GARAGE
MONUMENTATION: Metal Rod VM#: 13220
AGENCY: National Geodetic Survey IDB PID#: PM0361
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 44° 47.7' N ( 44.79528) LONGITUDE: 87° 18.8' W ( -87.31317)
The bench mark is a metal rod 30.8m (101.0 ft) North of the Sturgeon Bay Canal
Lighthouse, near the East corner of the garage and utility building, 14.2m (46.6
ft) NE from the SW corner of the building, 6.4m (21.0 ft) SW of the centerline
of Canal Road, 1.1m (3.6 ft) SW of the NE corner and 0.9ft (27.4 cm) from the SE
face of the building, about 15.2 cm below the ground, being the highest point of
a 5/8-inch diameter copper-coated steel rod, 6.1m (20.0 ft) long, protected by
PVC sleeve with alum NGS cover stamped "Garage", with witness post.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
Station ID: 9087072 PUBLICATION DATE: 08/11/2017
Name: STURGEON BAY CANAL, LAKE MICHIGAN
WI
NOAA Chart: 14919 Latitude: 44° 47.7' N ( 44.79558)
USGS Quad: Longitude: 87° 18.9' W ( -87.31433)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: FLAG A 1955
DESIGNATION: 908 7072 FLAG A
MONUMENTATION: Metal Rod VM#: 13221
AGENCY: National Geodetic Survey IDB PID#: PM0363
SETTING CLASSIFICATION: Metal rod driven into the ground OPUS PID:
LATITUDE: 44° 47.7' N ( 44.79444) LONGITUDE: 87° 18.8' W ( -87.31303)
The bench mark is a metal rod 14.0m (45.9 ft) East of the SW corner of USCG
bldg, 10.75m (35.27 ft) SW of the SW corner of the cinder block storage
building, 2.0m (6.56 ft) WNW of the West edge of a sidewalk running North and
South, 0.36m (1.18 ft) ESE of a metal pole with air temp sensor and white
housing, about flush with the ground, being the highest point on top of a 1-inch
diameter iron rod, 3.70m (12.14 ft) long. Mark protected by PVC sleeve with kick
block.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 9087072 PUBLICATION DATE: 08/11/2017
Name: STURGEON BAY CANAL, LAKE MICHIGAN
WI
NOAA Chart: 14919 Latitude: 44° 47.7' N ( 44.79558)
USGS Quad: Longitude: 87° 18.9' W ( -87.31433)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: CANAL 1953
DESIGNATION: CANAL
MONUMENTATION: Triangulation Station disk VM#: 13222
AGENCY: Coast and Geodetic Survey IDB PID#: PM0379
SETTING CLASSIFICATION: Concrete base OPUS PID:
LATITUDE: 44° 47.7' N ( 44.79497) LONGITUDE: 87° 18.8' W ( -87.31322)
The bench mark is a disk on the West side of the lighthouse, 7.80m (25.59 ft)
East of the North corner of the emergency generator building, 2.63m (8.63 ft)
East of the West edge of the concrete base of lighthouse, 0.60m (1.97 ft) West
of the lighthouse shaft, in the concrete base, being the highest point of the
center of a bronze disk, set into concrete.
BENCH MARK STAMPING: DWELLING A
DESIGNATION: 908 7072 DWELLING A
MONUMENTATION: Metal Rod VM#: 13223
AGENCY: National Geodetic Survey IDB PID#: PM0362
SETTING CLASSIFICATION: Metal rod driven into the ground OPUS PID:
LATITUDE: 44° 47.7' N ( 44.79478) LONGITUDE: 87° 18.8' W ( -87.31253)
The bench mark is a metal rod 37.1 m (121.7 ft) ENE of the NE corner of a cinder
block storage building, 17.5 m (57.4 ft) South of the SE corner of a transformer
box, 3.10 meters (10.17 ft) NW of the NW edge of parking lot, 0.15 m (0.49 ft)
below the ground, being the highest point on top of a 1-inch diameter iron rod
4.3 m (14.1 ft) long, protected by a PVC sleeve with alum access lid and witness
post.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 9087072 PUBLICATION DATE: 08/11/2017
Name: STURGEON BAY CANAL, LAKE MICHIGAN
WI
NOAA Chart: 14919 Latitude: 44° 47.7' N ( 44.79558)
USGS Quad: Longitude: 87° 18.9' W ( -87.31433)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: 7072 F 1990
DESIGNATION: 908 7072 F
MONUMENTATION: Bench Mark disk VM#: 13224
AGENCY: National Ocean Service (NOS) IDB PID#: AC8311
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 44° 47.7' N ( 44.79492) LONGITUDE: 87° 18.8' W ( -87.31414)
The bench mark is a disk 37.8m (124.0 ft) NW of North corner of gauge house,
8.0m (26.3 ft) North of North side of second bollard NW of gauge house, 7.8m
(25.6 ft) South of South side of thrid bollard NW of gauge house, 4.5m (14.8 ft)
NE of water edge of bulkhead, being highest point of standard NOS disk, 15.2cm
(0.5 ft) below the ground surface, 5in pvc pipe with a standard aluminum cover
and kickblock.
BENCH MARK STAMPING: 77-G 1977
DESIGNATION: 77-G
MONUMENTATION: Survey disk VM#: 13225
AGENCY: Army Corps of Engineers IDB PID#: AA8058
SETTING CLASSIFICATION: Concrete breakwall OPUS PID:
LATITUDE: 44° 47.7' N ( 44.79483) LONGITUDE: 87° 18.7' W ( -87.31233)
The bench mark is a disk 42.40m (139.11 ft) East of light pole, 7.50m (24.61 ft)
SE of the shore end of break wall, 6.20m (20.34 ft) North of the first a-frame
walkway support, 3.70m (12.14 ft) NE of the SW face, and 0.90m (2.95 ft) SW of
the NE face of the break wall, being the highest point on a brass disc set flush
in the top of a concrete break wall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
Station ID: 9087072 PUBLICATION DATE: 08/11/2017
Name: STURGEON BAY CANAL, LAKE MICHIGAN
WI
NOAA Chart: 14919 Latitude: 44° 47.7' N ( 44.79558)
USGS Quad: Longitude: 87° 18.9' W ( -87.31433)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: STURGEON A 1994
DESIGNATION: STURGEON A 1994
MONUMENTATION: Flange-encased Rod VM#: 13226
AGENCY: National Geodetic Survey IDB PID#: AA8057
SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID:
LATITUDE: 44° 47.7' N ( 44.79525) LONGITUDE: 87° 18.8' W ( -87.31392)
The bench mark is a stainless steel rod 53.3m (174.9 ft) West of the lighthouse,
38.7m (127.0 ft) NW from the NE corner of the residence on Coast Guard base,
23.2m (76.1 ft) SW from the SE corner of the maintenance garage, 6.0m (19.7 ft)
North of a yellow standpipe, being the highest point of a stainless steel rod
driven 9.45m (31.00 ft) , protected by a PVC sleeve with alum access lid and
witness post, flush with the ground.
BENCH MARK STAMPING: BM 1
DESIGNATION: 908 7072 1
MONUMENTATION: Bolt VM#: 18383
AGENCY: IDB PID#: PM0380
SETTING CLASSIFICATION: Base of lighthouse shaft OPUS PID:
LATITUDE: 44° 47.7' N ( 44.79494) LONGITUDE: 87° 18.8' W ( -87.31322)
The bench mark is a bolt on the South side of the lighthouse, opposite the hinge
of the side door into the base of the lighthouse shaft, on the outer end of the
South outer leg, 4.13 m (13.55 ft) South of the steel lighthouse shaft wall and
on top of the West anchor bolt, being the highest point of a cross cut in top of
the bolt.
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: 9087072 PUBLICATION DATE: 08/11/2017
Name: STURGEON BAY CANAL, LAKE MICHIGAN
WI
NOAA Chart: 14919 Latitude: 44° 47.7' N ( 44.79558)
USGS Quad: Longitude: 87° 18.9' W ( -87.31433)
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: 9087072 PUBLICATION DATE: 08/11/2017
Name: STURGEON BAY CANAL, LAKE MICHIGAN
WI
NOAA Chart: 14919 Latitude: 44° 47.7' N ( 44.79558)
USGS Quad: Longitude: 87° 18.9' W ( -87.31433)
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/.