U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 9
Station ID: 9075035 PUBLICATION DATE: 08/11/2017
Name: ESSEXVILLE, LAKE HURON
MI
NOAA Chart: 14867 Latitude: 43° 38.4' N ( 43.64040)
USGS Quad: Longitude: 83° 50.8' W ( -83.84680)
TO REACH THE NOS GAUGING STATION IN ESSEXVILLE, BAY COUNTY, MICHIGAN, FROM THE
INTERSECTION OF YOUNG DITCH RD AND PINE ST, PROCEED NORTH ON PINE ST FOR APPROX
3.35 MILE (5.39 KM) TO THE CONSUMERS POWER COMPANY, WEADOCK POWER PLANT, THENCE
1.6 KILOMETERS (1.00 MI) ALONG THE ASPHALT DRIVE TO THE MAIN J.C. WEADOCK PLANT
NEAR THE WATERS EDGE, AND THE NOAA GAUGE HOUSE LOCATED ON THE EAST SIDE OF THE
SAGINAW RIVER.
G R E A T L A K E S B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 5035 G 1990
DESIGNATION: 907 5035 G
MONUMENTATION: Bench Mark disk VM#: 13052
AGENCY: National Ocean Survey IDB PID#: AC6034
SETTING CLASSIFICATION: Stainless steel rod w/o sleeve OPUS PID:
LATITUDE: 43° 38.5' N ( 43.64153) LONGITUDE: 83° 50.7' W ( -83.84469)
The primary bench mark is a disk 32.9 m (107.9 ft) NW of the NW corner of a one
story double-wide training trailer, 21.5 m (70.5 ft) West of centerline of road
leading to parking lot, 18.4 m (60.4 ft) NE of 0.8 m (2.6 ft) diameter Dutch elm
tree, 5.9 m (19.4 ft) SSE of inside of parking lot curb, being highest point of
standard NOS bench mark disk, crimped atop a 15.8 m (51.8 ft) stainless steel
rod, encased in concrete kick block with 4-inch PVC pipe and cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 9
Station ID: 9075035 PUBLICATION DATE: 08/11/2017
Name: ESSEXVILLE, LAKE HURON
MI
NOAA Chart: 14867 Latitude: 43° 38.4' N ( 43.64040)
USGS Quad: Longitude: 83° 50.8' W ( -83.84680)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: CON 1947 GER
DESIGNATION: 907 5035 CON
MONUMENTATION: Survey disk VM#: 13047
AGENCY: US Lake Survey IDB PID#: OJ0526
SETTING CLASSIFICATION: Building OPUS PID:
LATITUDE: 43° 38.4' N ( 43.64078) LONGITUDE: 83° 50.7' W ( -83.84561)
The bench mark is a disk on the Consumers Power Company, Weadock Power Plant set
in the North face of the main building, on West side of entrance, 13.85 m (45.44
ft) SSE of flagpole, 8.8 m (28.9 ft) ENE of East face of West wing of building,
3.4 m (11.2 ft) WSW of center of building entrance door, 1.0 m (3.3 ft) above
the ground, being horizontal line of cross at center of bronze disk set into the
foundation.
BENCH MARK STAMPING:
DESIGNATION: 907 5035 DISC
MONUMENTATION: Bench Mark disk VM#: 13048
AGENCY: Army Corps of Engineers IDB PID#:
SETTING CLASSIFICATION: Foundation on gauge house OPUS PID:
LATITUDE: 43° 38.5' N ( 43.64100) LONGITUDE: 83° 50.8' W ( -83.84633)
The bench mark is a disk set flush with the surface of the concrete foundation
on the NE corner of the red brick water level gauge house, 8.00 m (26.25 ft)
West from center of street, 2.48 m (8.14 ft) North from South corner of gauge
house, and 0.15 m (0.49 ft) East from face of gauge house.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 9
Station ID: 9075035 PUBLICATION DATE: 08/11/2017
Name: ESSEXVILLE, LAKE HURON
MI
NOAA Chart: 14867 Latitude: 43° 38.4' N ( 43.64040)
USGS Quad: Longitude: 83° 50.8' W ( -83.84680)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: U.S.L.S. B.M. LEG 1947
DESIGNATION: 907 5035 LEG
MONUMENTATION: Bolt VM#: 13049
AGENCY: IDB PID#: OJ0523
SETTING CLASSIFICATION: Building OPUS PID:
LATITUDE: 43° 38.5' N ( 43.64106) LONGITUDE: 83° 50.8' W ( -83.84611)
The bench mark is a bolt set on downstream bent of two supporting conveyor
leading to the power plant building, 25.7 m (84.3 ft) NNW of centerline of road
leading to gauge house, 20.9 m (68.6 ft) East of the SE corner of brick gauge
house, 3.55 m (11.65 ft) SSE of SW corner of a brick garage, 0.43 m (1.41 ft)
above concrete footing of West leg of the bent, being highest point in square
field in top of the NW anchor bolt.
BENCH MARK STAMPING: 907 3035 FS 9
DESIGNATION: 907 5035 FS 9
MONUMENTATION: Metal Rod VM#: 13050
AGENCY: National Geodetic Survey IDB PID#: OJ0522
SETTING CLASSIFICATION: Iron rod OPUS PID:
LATITUDE: 43° 38.5' N ( 43.64175) LONGITUDE: 89° 50.8' W ( -89.84589)
The bench mark is an iron rod at the upstream end and on river side of long shed
over conveyor leading from the coal stock pile, 9.40 m (30.84 ft) NE of SE
corner of aluminum-sided garage running parallel to river, 0.20 m (0.66 ft)
North from the top of the concrete step at entrance to door, 0.18 m (0.59 ft)
West from river face of shed, 0.15 m (0.49 ft) North from concrete landing at
doorway, below the ground, being highest point on top of a 1 1/4 inch diameter
iron rod, 4.90 m (16.08 ft) long, 5-inch PVC kick block and aluminum access
cover with concrete flush with ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 9
Station ID: 9075035 PUBLICATION DATE: 08/11/2017
Name: ESSEXVILLE, LAKE HURON
MI
NOAA Chart: 14867 Latitude: 43° 38.4' N ( 43.64040)
USGS Quad: Longitude: 83° 50.8' W ( -83.84680)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: 5035 H 1992
DESIGNATION: 907 5035 H
MONUMENTATION: Bench Mark disk VM#: 13053
AGENCY: National Ocean Survey IDB PID#: AC6035
SETTING CLASSIFICATION: Stainless steel rod w/o sleeve OPUS PID:
LATITUDE: 43° 38.4' N ( 43.63956) LONGITUDE: 83° 50.5' W ( -83.84200)
The bench mark is a disk 12.2 m (40.0 ft) SW of centerline of main plant road,
11.85 m (38.88 ft) West of centerline of entrance road, 6.0 m (19.7 ft) ENE of
most East rail of railroad track, 1.5 m (4.9 ft) East of light pole, being
highest point of standard bench mark disk, crimped atop a 12.5 m (41.0 ft)
stainless steel rod, encased in concrete kick block with 5-inch PVC pipe and
cover.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 9
Station ID: 9075035 PUBLICATION DATE: 08/11/2017
Name: ESSEXVILLE, LAKE HURON
MI
NOAA Chart: 14867 Latitude: 43° 38.4' N ( 43.64040)
USGS Quad: Longitude: 83° 50.8' W ( -83.84680)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: ESSEX A 1994
DESIGNATION: ESSEX A
MONUMENTATION: Flange-encased Rod VM#: 13056
AGENCY: National Geodetic Survey IDB PID#: AA8053
SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID:
LATITUDE: 43° 37.7' N ( 43.62847) LONGITUDE: 83° 50.3' W ( -83.83828)
The bench mark is a stainless steel rod set in the back yard of the US Army
Corps of Engineers and near a tower, 52.9 m (173.6 ft) NW of the NW corner of a
concrete boat ramp, 46.1 m (151.2 ft) West of the West edge of the paved parking
lot, 41.2 m (135.2 ft) WSW of the SW corner of the maintenance building, 24.1 m
(79.1 ft) South of the North perimeter fence, and 9.2 m (30.2 ft) East of the
rock line along the river, BM is a punch hole top center on a steel rod encased
in a 6-inch PVC sleeve with aluminum cap 1 cm below ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 9
Station ID: 9075035 PUBLICATION DATE: 08/11/2017
Name: ESSEXVILLE, LAKE HURON
MI
NOAA Chart: 14867 Latitude: 43° 38.4' N ( 43.64040)
USGS Quad: Longitude: 83° 50.8' W ( -83.84680)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: ESSEX B 1994
DESIGNATION: ESSEX B
MONUMENTATION: Flange-encased Rod VM#: 13057
AGENCY: National Geodetic Survey IDB PID#: AA8054
SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID:
LATITUDE: 43° 37.7' N ( 43.62758) LONGITUDE: 83° 50.2' W ( -83.83633)
The bench mark is a stainless steel rod set in the grass near the front gate to
the USCG, 23.6 m (77.4 ft) ESE of a utility pole with light and transformer, and
22.9 m (75.1 ft) ENE of a telephone pedestal, 11.0 m (36.1 ft) West of the
centerline of Weadock road, 9.0 m (29.5 ft) NNW of a utility pole with light,
1.0 m (3.3 ft) South of the South edge of the South curb leading to the USCG,
and 1.0 m (3.3 ft) East of witness post. BM is a punch hole top center on a
steel rod encased in a PVC sleeve with aluminum cap set flush with the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 9
Station ID: 9075035 PUBLICATION DATE: 08/11/2017
Name: ESSEXVILLE, LAKE HURON
MI
NOAA Chart: 14867 Latitude: 43° 38.4' N ( 43.64040)
USGS Quad: Longitude: 83° 50.8' W ( -83.84680)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: YACHT USLS CBF 1960
DESIGNATION: YACHT
MONUMENTATION: Survey disk VM#: 13059
AGENCY: US Army Corps of Engineers IDB PID#: OJ0532
SETTING CLASSIFICATION: Building OPUS PID:
LATITUDE: 43° 37.5' N ( 43.62531) LONGITUDE: 83° 50.3' W ( -83.83875)
The bench mark is a disk set in the NE corner of a cinderblock building, 10.57 m
(34.68 ft) East of the NW corner of the yacht club building, 4.80 m (15.75 ft)
South of the center of a manhole cover, 0.41 m (1.35 ft) West of NE corner, 4
1/2 ft. above the ground, being horizontal line of cross at center of bronze
disk set into the block.
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 8 of 9
Station ID: 9075035 PUBLICATION DATE: 08/11/2017
Name: ESSEXVILLE, LAKE HURON
MI
NOAA Chart: 14867 Latitude: 43° 38.4' N ( 43.64040)
USGS Quad: Longitude: 83° 50.8' W ( -83.84680)
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 9 of 9
Station ID: 9075035 PUBLICATION DATE: 08/11/2017
Name: ESSEXVILLE, LAKE HURON
MI
NOAA Chart: 14867 Latitude: 43° 38.4' N ( 43.64040)
USGS Quad: Longitude: 83° 50.8' W ( -83.84680)
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/.