U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 9
Station ID: 9044036 PUBLICATION DATE: 08/11/2017
Name: FORT WAYNE, DETROIT RIVER
MI
NOAA Chart: 14848 Latitude: 42° 17.9' N ( 42.29830)
USGS Quad: Longitude: 83° 5.6' W ( -83.09330)
TO REACH THE NOS GAUGING STATION IN FORT WAYNE, DETROIT, WAYNE COUNTY, MICHIGAN,
FROM THE INTERSECTION OF LIVERNOIS AVE, HWY 75 AND FORT ST, PROCEED SOUTH ON
LIVERNOIS AVE FOR APPROX 0.5 MILE (0.8 KM) TO THE ENTRANCE OF HISTORIC FORT
WAYNE, THEN PROCEED SOUTHEAST ON BRADY ST FOR APPROX 0.2 MILE (0.3 KM) TO THE
2ND SECURITY GATE, ON THE EAST SIDE OF BRADY ST, AT FORT WAYNE MILITARY
RESERVATION, AT THE BOATYARD OCCUPIED BY THE US ARMY CORPS OF ENGINEERS, THEN
PROCEED NORTHEAST APPROX 0.25 MILE (0.40 KM) ALONG PAVED BOATYARD ROAD TO THE
BOAT SLIP, TO THE NOAA GAUGE HOUSE, NEAR THE RIVERS EDGE AT THE NORTHEAST CORNER
OF COE 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: RAMP
DESIGNATION: 904 4036 RAMP
MONUMENTATION: Flange-encased Rod VM#: 12948
AGENCY: National Geodetic Survey IDB PID#: NE0622
SETTING CLASSIFICATION: Galvanized steel pipe in sleeve OPUS PID:
LATITUDE: 42° 18.0' N ( 42.29917) LONGITUDE: 83° 5.6' W ( -83.09328)
The bench mark is a galvanized steel pipe 53.3 m (174.9 ft) NW of the W corner
of the gauge house, 28.1 m (92.2 ft) E of S corner and 26.1 m (85.6 ft) SE of
the E corner of the boat house, 3.1 m (10.2 ft) W of the S corner of the ramp on
the NE side of slip, 1.7 m (5.6 ft) S of junction of W corner of ramp and
retaining wall, 0.46 m (1.51 ft) below the ground, being the highest point of a
stainless steel plug on top of a 3/8-inch galvanized steel pipe 26.8 m (87.9 ft)
long, protected by a 6-inch concrete pipe with cover 0.36 m (1.18 ft) below
ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 9
Station ID: 9044036 PUBLICATION DATE: 08/11/2017
Name: FORT WAYNE, DETROIT RIVER
MI
NOAA Chart: 14848 Latitude: 42° 17.9' N ( 42.29830)
USGS Quad: Longitude: 83° 5.6' W ( -83.09330)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: GAGE
DESIGNATION: 904 4036 GAGE
MONUMENTATION: Survey disk VM#: 12949
AGENCY: US Army Corps of Engineers IDB PID#: NE0623
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 42° 17.9' N ( 42.29894) LONGITUDE: 83° 5.6' W ( -83.09267)
The benchmark is a disk on the NE side and the E corner of the boat slip, set at
the W corner of the concrete foundation of the gauge house, 0.3 m (1.0 ft) NE of
the SW edge of foundation and 0.1 m (0.3 ft) SE of NW edge of foundation, 0.12 m
(0.39 ft) above the ground surface.
BENCH MARK STAMPING: GARAGE 1959
DESIGNATION: 904 4036 GARAGE
MONUMENTATION: Survey disk VM#: 12950
AGENCY: US Army Corps of Engineers IDB PID#: NE0618
SETTING CLASSIFICATION: Wall OPUS PID:
LATITUDE: 42° 17.9' N ( 42.29883) LONGITUDE: 83° 5.6' W ( -83.09375)
The bench mark is a bronze disc set vertically in the river (S) face of a
two-story brick building used as a garage, 39.6 m (129.9 ft) E of doorway
entrance to building 403 (garage), 23.2 m (76.1 ft) N of the NE corner of
building 414, 0.36 m (1.18 ft) SW of the E corner of building number 403, 1.5 m
(4.9 ft) above the asphalt.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 9
Station ID: 9044036 PUBLICATION DATE: 08/11/2017
Name: FORT WAYNE, DETROIT RIVER
MI
NOAA Chart: 14848 Latitude: 42° 17.9' N ( 42.29830)
USGS Quad: Longitude: 83° 5.6' W ( -83.09330)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: FORT
DESIGNATION: 904 4036 FORT
MONUMENTATION: Metal Rod VM#: 12951
AGENCY: National Geodetic Survey IDB PID#: NE0617
SETTING CLASSIFICATION: Metal rod driven into the ground OPUS PID:
LATITUDE: 42° 18.0' N ( 42.29967) LONGITUDE: 83° 5.6' W ( -83.09417)
The bench mark is a metal rod 22.6 meters (74.1 ft) NW of gas building, 10.1 m
(33.1 ft) NW of chain link fence that runs NE-SW, 7.0 m (23.0 ft) from a cross
cut on the curb above a catch basin, 4.5 m (14.8 ft) from another cross cut on
top of the roadway curb near a driveway, 3.9 m (12.8 ft) SW of SW edge of paved
parking lot, 3.5 m (11.5 ft) NE of chain link fence that runs NW-SE, at foot of
bank 1.2 m (3.9 ft) below level of parking area, being the top of a 1 3/8 inch
steel rod, 4.9 m (16.1 ft) long.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 9
Station ID: 9044036 PUBLICATION DATE: 08/11/2017
Name: FORT WAYNE, DETROIT RIVER
MI
NOAA Chart: 14848 Latitude: 42° 17.9' N ( 42.29830)
USGS Quad: Longitude: 83° 5.6' W ( -83.09330)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: TOWER
DESIGNATION: 904 4036 TOWER
MONUMENTATION: Pipe Cap VM#: 12954
AGENCY: National Geodetic Survey IDB PID#: NE0620
SETTING CLASSIFICATION: Galvanized steel pipe in sleeve OPUS PID:
LATITUDE: 42° 17.9' N ( 42.29800) LONGITUDE: 83° 5.6' W ( -83.09417)
The bench mark is a galvanized steel pipe at the E corner of building 401, 59 m
(193.6 ft) SE of the center of the road, 32.2 m (105.6 ft) S of the S corner of
office building 414, 8.1 m (26.6 ft) N of SE corner of building 401, 5.3 m (17.4
ft) NW of the W corner of a 18 by 20 foot (6.1 m) concrete foundation of a now
removed tower, 1.0 m (3.3 ft) N of the NW corner of tower foundation, and is the
highest point on top of a brass plug on top of a 3/8 inch galvanized pipe 95
feet (29.0 m) long, 0.36 m (1.18 ft) below ground, encased in a 1-inch
galvanized steel pipe, protected by a 6-inch concrete pipe with cover 0.30 m
(0.98 ft) below ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 9
Station ID: 9044036 PUBLICATION DATE: 08/11/2017
Name: FORT WAYNE, DETROIT RIVER
MI
NOAA Chart: 14848 Latitude: 42° 17.9' N ( 42.29830)
USGS Quad: Longitude: 83° 5.6' W ( -83.09330)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: S 234 1980
DESIGNATION: S 234
MONUMENTATION: Flange-encased Rod VM#: 12955
AGENCY: National Geodetic Survey IDB PID#: NE0868
SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID:
LATITUDE: 42° 18.0' N ( 42.30000) LONGITUDE: 83° 5.9' W ( -83.09881)
The bench mark is a stainless steel rod near the main entrance gate to
historical Fort Wayne, 8.2 m (26.9 ft) SE of the SE curb of Jefferson, 7.96 m
(26.12 ft) SW of the SW curb of a paved road leading SE into the fort, 7.95 m
(26.08 ft) NE of the face of an unmarked power/telephone pole, 3.12 m (10.24 ft)
SE of a 5-foot chain link fence, 1.47 m (4.82 ft) SW of the S corner of a small
block building.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 9
Station ID: 9044036 PUBLICATION DATE: 08/11/2017
Name: FORT WAYNE, DETROIT RIVER
MI
NOAA Chart: 14848 Latitude: 42° 17.9' N ( 42.29830)
USGS Quad: Longitude: 83° 5.6' W ( -83.09330)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: FORT WAYNE A 1994
DESIGNATION: FORT WAYNE A
MONUMENTATION: Flange-encased Rod VM#: 12956
AGENCY: National Geodetic Survey IDB PID#: AA8055
SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID:
LATITUDE: 42° 17.8' N ( 42.29733) LONGITUDE: 83° 5.7' W ( -83.09433)
The bench mark is a stainless steel rod in a grass strip between a paved area
and the river, 30.1 m (98.8 ft) SE of the SE corner of brick warehouse, 16.5 m
(54.1 ft) S of the S corner of the brick warehouse, 16.4 m (53.8 ft) NW of the
river edge, 8.2 m (26.9 ft) W of the most SW one of nine large ship tie-up
pillars, 4.4 m (14.4 ft) SE of the pavement edge, and 1.45 m (4.76 ft) NE of a
fiberglass witness post and fence post, mark is a punch hole top center on a
steel rod encased in a PVC pipe logo cap set in a concrete post 1 cm below
ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 9
Station ID: 9044036 PUBLICATION DATE: 08/11/2017
Name: FORT WAYNE, DETROIT RIVER
MI
NOAA Chart: 14848 Latitude: 42° 17.9' N ( 42.29830)
USGS Quad: Longitude: 83° 5.6' W ( -83.09330)
G R E A T L A K E S B E N C H M A R K S
BENCH MARK STAMPING: FORT WAYNE B 1994
DESIGNATION: FORT WAYNE B
MONUMENTATION: Flange-encased Rod VM#: 12957
AGENCY: National Geodetic Survey IDB PID#: AA8056
SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID:
LATITUDE: 42° 17.8' N ( 42.29694) LONGITUDE: 83° 5.9' W ( -83.09875)
The bench mark is a stainless steel rod on the E side of Gibbs St, at the W
corner of a parade ground, at the NW end of a dirt ridge, in a small grassy
triangle formed by the ridge, a gravel lane and a paved street, 18.3 m (60.0 ft)
SSE of a utility pole with yard light, 14.6 m (47.9 ft) SW of the extended
center of Shelby Street, 12.8 m (42.0 ft) SE of the center of Gibbs Street,12.4
m SW of the SE post of sign "Riverfront Promenade", 6.8 m (22.3 ft) W of the
center of a gravel lane, 14 m (45.9 ft) NE of the base of the ridge, 10.4 m
(34.1 ft) NW of a metal light pole, bench mark is a punch hole top center on a
steel rod encased in a PVC pipe with logo cap set in a concrete post 1 cm below
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 8 of 9
Station ID: 9044036 PUBLICATION DATE: 08/11/2017
Name: FORT WAYNE, DETROIT RIVER
MI
NOAA Chart: 14848 Latitude: 42° 17.9' N ( 42.29830)
USGS Quad: Longitude: 83° 5.6' W ( -83.09330)
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: 9044036 PUBLICATION DATE: 08/11/2017
Name: FORT WAYNE, DETROIT RIVER
MI
NOAA Chart: 14848 Latitude: 42° 17.9' N ( 42.29830)
USGS Quad: Longitude: 83° 5.6' W ( -83.09330)
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/.