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Bench Mark Sheet for 9087057, Milwaukee WI

Superseded Epoch

Large map location marker Station Location
Small red map location marker Published bench mark
Small blue map location marker Unpublished bench mark

Bench mark positions only appear on the map if their coordinates in the CO-OPS database are at the precision of degrees/minutes/seconds/and tenths of seconds. If the coordinates are less precise, the mark will not appear.

Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  7

                                                                                
Station ID: 9087057                         PUBLICATION DATE:  08/11/2017
Name:       MILWAUKEE, LAKE MICHIGAN                          
            WI
NOAA Chart: 14924                           Latitude:   43°  0.1' N (  43.00200)
USGS Quad:                                  Longitude:  87° 53.3' W ( -87.88760)


TO REACH THE NOS GAUGING STATION, IN MILWAUKEE, MILWAUKEE COUNTY, WISCONSIN,
FROM THE INTERSECTION OF I-794 AND CARFERRY ST, PROCEED EAST ON CARFERRY ST FOR
0.48 KM (0.30 MI) TO THE INTERSECTION WITH LINCOLN MEMORIAL DRIVE, THEN PROCEED
SOUTH ON LINCOLN MEMORIAL DRIVE FOR 0.08 KM (0.05MI) TO THE U.S. NAVAL AND
MARINE CORP RESERVE TRAINING CENTER, THE GAUGE HOUSE IS LOCATED BEHIND THE MAIN
BUILDING IN FRONT OF THE BOAT DOCK.


                    G R E A T  L A K E S   B E N C H   M A R K S


                 PRIMARY BENCH MARK STAMPING:  NAVY 1963 WJM
                         DESIGNATION:          908 7057 NAVY

MONUMENTATION:           Survey disk                           VM#:        13205
AGENCY:                  Army Corps of Engineers               IDB PID#:  OL0278
SETTING CLASSIFICATION:  Building pillar foundation            OPUS PID:        
LATITUDE:   43°  0.1' N (  43.00108)          LONGITUDE:  87° 53.4' W ( -87.88981)


The bench mark is a disk 57.6 m (189.0 ft) SW of the center line of South
Lincoln Memorial Drive, 6.09 m (19.98 ft) NE of the center of the S entrance to
reserve building, 0.20 m (0.66 ft) West of the SE corner of reserve building,
set vertically in the SE face of the concrete pillar of brick building, 21.3 cm
SW of the East corner and 1.1 m (3.6 ft) above the level of the ground.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  7

                                                                                
Station ID: 9087057                         PUBLICATION DATE:  08/11/2017
Name:       MILWAUKEE, LAKE MICHIGAN                          
            WI
NOAA Chart: 14924                           Latitude:   43°  0.1' N (  43.00200)
USGS Quad:                                  Longitude:  87° 53.3' W ( -87.88760)


                    G R E A T  L A K E S   B E N C H   M A R K S


                         BENCH MARK STAMPING:  RARITAN 1969 USLS CMEG
                         DESIGNATION:          908 7057 RARITAN

MONUMENTATION:           Survey disk                           VM#:        13206
AGENCY:                  Army Corps of Engineers               IDB PID#:  OL0281
SETTING CLASSIFICATION:  Concrete foundation sill              OPUS PID:        
LATITUDE:   43°  0.1' N (  43.00197)          LONGITUDE:  87° 53.3' W ( -87.88764)


The bench mark is a disk 53.6 m (175.9 ft) North of the North corner of the
barracks, 16.8 m (55.1 ft) SW of a steel bulkhead at boat dock, at the South
corner of an 8-by-8 brick building for the NOS gauging station, 3.40 m (11.15
ft) East of the East edge of boat lift drive way, set in the top of the South
corner of the concrete foundation of the building, 15.2 cm SW of the South
corner of the building and 17.78 cm (7 in) above the level of the ground.



                         BENCH MARK STAMPING:  7057 G 1991
                         DESIGNATION:          908 7057 G

MONUMENTATION:           Survey disk                           VM#:        13207
AGENCY:                  National Ocean Service                IDB PID#:  AC8303
SETTING CLASSIFICATION:  Stainless steel rod w/o sleeve        OPUS PID:        
LATITUDE:   43°  0.1' N (  43.00172)          LONGITUDE:  87° 53.4' W ( -87.89025)


The bench mark is a disk 33.8 m (110.9 ft) NW of the North most gun in front of
training center, 6.4 m (21.0 ft) East of the entrance on the North side of
building, 1.1 m (3.6 ft) South of South edge of East-West sidewalk, 1.1 m (3.6
ft) North of North face and at the NE corner of training center building, 15.2
cm below ground with access through 5 inch PVC cover.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  7

                                                                                
Station ID: 9087057                         PUBLICATION DATE:  08/11/2017
Name:       MILWAUKEE, LAKE MICHIGAN                          
            WI
NOAA Chart: 14924                           Latitude:   43°  0.1' N (  43.00200)
USGS Quad:                                  Longitude:  87° 53.3' W ( -87.88760)


                    G R E A T  L A K E S   B E N C H   M A R K S


                         BENCH MARK STAMPING:  7057 F 1985
                         DESIGNATION:          908 7057 F

MONUMENTATION:           Survey disk                           VM#:        13208
AGENCY:                  National Ocean Survey                 IDB PID#:  AC8302
SETTING CLASSIFICATION:  4.5 x 4.5 concrete base               OPUS PID:        
LATITUDE:   43°  0.1' N (  43.00131)          LONGITUDE:  87° 53.3' W ( -87.88892)


The bench mark is a disk 31.1 m (102.0 ft) South of the NW corner and 31.0 m
(101.7 ft) NW of the SW corner of the main coast guard building, 14.2 m (46.6
ft) West of the center of the doorway to main Coast Guard building, 3.8 m (12.5
ft) ENE of fire hydrant, set in top of a 4.5 x 4.5 ft. (1.4 m) concrete flagpole
base.



                         BENCH MARK STAMPING:   
                         DESIGNATION:          908 7057 CAP

MONUMENTATION:           Chiseled Square                       VM#:        13210
AGENCY:                                                        IDB PID#:  OL0282
SETTING CLASSIFICATION:  Bulkhead                              OPUS PID:        
LATITUDE:   43°  0.1' N (  43.00206)          LONGITUDE:  87° 53.3' W ( -87.88761)


The bench mark is a chiseled square 39.3 m (128.9 ft) SE of the West corner of
the Coast Guard boat basin, 14.3 meters (46.9 ft) NE of the North corner of the
NOS gauge house, 0.4 m (1.3 ft) SE of the SE edge of a catwalk and SE track for
boat hoist, a 1 1/2 inch square formed by cut lines on the top of a 14 inch wide
and 8.5 m (27.9 ft) long steel bulkhead and directly over the staff, 35.56 cm
(14.0 inches) above the level of the dock.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  7

                                                                                
Station ID: 9087057                         PUBLICATION DATE:  08/11/2017
Name:       MILWAUKEE, LAKE MICHIGAN                          
            WI
NOAA Chart: 14924                           Latitude:   43°  0.1' N (  43.00200)
USGS Quad:                                  Longitude:  87° 53.3' W ( -87.88760)


                    G R E A T  L A K E S   B E N C H   M A R K S


                         BENCH MARK STAMPING:  MILWAUKEE A 1994
                         DESIGNATION:          908 7057 MILWAUKEE A

MONUMENTATION:           Flange-encased Rod                    VM#:        13212
AGENCY:                  National Geodetic Survey              IDB PID#:  AA8061
SETTING CLASSIFICATION:  Stainless steel rod in sleeve         OPUS PID:        
LATITUDE:   43°  0.2' N (  43.00281)          LONGITUDE:  87° 53.3' W ( -87.88906)


The bench mark is a stainless steel rod 45.28 m (148.56 ft) SSE of the N fence
around compound, 31.55 m (103.51 ft) North of the NW corner of concrete pad, and
30.20 m (99.08 ft) NNW of the NE corner of the concrete pad, 15.8 meters (51.8
ft) SW from a fence, 9.7 meters (31.8 ft) NE from the East edge of pavement. 
Protected by PVC sleeve, alum access lid and witness post.



                         BENCH MARK STAMPING:  MILWAUKEE B 1994
                         DESIGNATION:          908 7057 MILWAUKEE B

MONUMENTATION:           Flange-encased Rod                    VM#:        13213
AGENCY:                  National Geodetic Survey              IDB PID#:  AA8062
SETTING CLASSIFICATION:  Stainless steel rod in sleeve         OPUS PID:        
LATITUDE:   43°  0.1' N (  43.00239)          LONGITUDE:  87° 53.4' W ( -87.89019)


The bench mark is a stainless steel rod 14.0 m (45.9 ft) NNW from a yield sign,
13.4 m (44.0 ft) SW from a light pole, 11.45 m (37.57 ft) ENE from a light pole,
and 11.0 m (36.1 ft) SSE from the edge of paved drive to parking lot, with
5-inch PVC pipe and aluminum access cover surrounded by concrete and flush with
the ground and witness post.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  7

                                                                                
Station ID: 9087057                         PUBLICATION DATE:  08/11/2017
Name:       MILWAUKEE, LAKE MICHIGAN                          
            WI
NOAA Chart: 14924                           Latitude:   43°  0.1' N (  43.00200)
USGS Quad:                                  Longitude:  87° 53.3' W ( -87.88760)


                    G R E A T  L A K E S   B E N C H   M A R K S


                         BENCH MARK STAMPING:  77 15 1977 KEWAUNEE PROJECT OFF
                         DESIGNATION:          908 7057 77 15

MONUMENTATION:           Bench Mark disk                       VM#:        21726
AGENCY:                  Army Corps of Engineers               IDB PID#:        
SETTING CLASSIFICATION:  Concrete Cell                         OPUS PID:        
LATITUDE:   43°  0.2' N (  43.00281)          LONGITUDE:  87° 53.2' W ( -87.88736)


The bench mark is a disk 19.4m (63.6 ft) North of a steel cleat (2nd one South
of North end of USCG boat basin), 15.5m (50.9 ft) South of NW bollard, 8.8m
(28.9 ft) West of a light pole, 1.85m (6.1 ft) East of seawell, set in a massive
concrete cell





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: 9087057                         PUBLICATION DATE:  08/11/2017
Name:       MILWAUKEE, LAKE MICHIGAN                          
            WI
NOAA Chart: 14924                           Latitude:   43°  0.1' N (  43.00200)
USGS Quad:                                  Longitude:  87° 53.3' W ( -87.88760)


                             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: 9087057                         PUBLICATION DATE:  08/11/2017
Name:       MILWAUKEE, LAKE MICHIGAN                          
            WI
NOAA Chart: 14924                           Latitude:   43°  0.1' N (  43.00200)
USGS Quad:                                  Longitude:  87° 53.3' W ( -87.88760)


                             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/.


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Products available at 9087057 Milwaukee, WI

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services