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Bench Mark Sheet for 9099018, Marquette C.G. MI

Superseded Epoch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Small blue map location marker Unpublished bench mark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  6

                                                                                
Station ID: 9099018                         PUBLICATION DATE:  08/11/2017
Name:       MARQUETTE C.G, LAKE SUPERIOR                      
            MI
NOAA Chart: 14970                           Latitude:   46° 32.7' N (  46.54556)
USGS Quad:                                  Longitude:  87° 22.7' W ( -87.37861)


TO REACH THE NOS GAUGE HOUSE IN MARQUETTE, MARQUETTE COUNTY, MICHIGAN, FROM THE
INTERSECTION OF WASHINGTON ST AND LAKESHORE BLVD, PROCEED NORTH ON LAKESHORE
BLVD FOR 0.72 KM (0.45 MI) TO THE INTERSECTION WITH COAST GUARD RD, THEN PROCEED
EAST ON COAST GUARD ROAD FOR APPROX 0.08 KM (0.05 MI) TO THE NOS WATER LEVEL
GAUGE HOUSE ON THE EAST SIDE OF ROAD.


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


                 PRIMARY BENCH MARK STAMPING:  U.S.B.M NO. 11
                         DESIGNATION:          909 9018 11

MONUMENTATION:           Chiseled Square                       VM#:        13367
AGENCY:                                                        IDB PID#:  RK0113
SETTING CLASSIFICATION:  Water table foundation on rock        OPUS PID:        
LATITUDE:   46° 32.7' N (  46.54539)          LONGITUDE:  87° 22.8' W ( -87.37956)


The bench mark is a chisled square 25.0m (82.0 ft) South of the NW corner of the
building,24.8m (81.36 ft) North of the centerline of the street named Coast
Guard Rd, 6.50m (21.33 ft) West of the centerline of the door entrance to the
building, 1.0m (3.3 ft) above the ground, 24.4 cm East of the SW corner of the
building, inscribed in stone 'USBM NO 11'

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  6

                                                                                
Station ID: 9099018                         PUBLICATION DATE:  08/11/2017
Name:       MARQUETTE C.G, LAKE SUPERIOR                      
            MI
NOAA Chart: 14970                           Latitude:   46° 32.7' N (  46.54556)
USGS Quad:                                  Longitude:  87° 22.7' W ( -87.37861)


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


                         BENCH MARK STAMPING:  9018 L 1998
                         DESIGNATION:          909 9018 L

MONUMENTATION:           Tidal Station disk                    VM#:        13369
AGENCY:                  National Ocean Service (NOS)          IDB PID#:  RK0450
SETTING CLASSIFICATION:  Rock outcrop                          OPUS PID:        
LATITUDE:   46° 32.8' N (  46.54617)          LONGITUDE:  87° 22.6' W ( -87.37667)


The bench mark is a disk set in a large rock outcrop on the South side of the
Lighthouse Point, 47.4 m (155.68 ft) South of the centerline of the red stairs
leading up to the Lighthouse, 33.8 m (111.1 ft ) SW of the SW concrete
foundation post, approximately 17 m ( 55.8 ft) West of the East edge of the rock
point, approximately 16.5 m (54.1 ft) East of the West edge of the rock point,
12.9 m (42.3 ft) North of the upper bedrock point, set flush with the ground
surface.



                         BENCH MARK STAMPING:   
                         DESIGNATION:          909 9018 TRI

MONUMENTATION:           Bench Mark disk                       VM#:        13370
AGENCY:                  Coast and Geodetic Survey             IDB PID#:  RK0421
SETTING CLASSIFICATION:  Top of concrete monument              OPUS PID:        
LATITUDE:   46° 32.8' N (  46.54708)          LONGITUDE:  87° 22.7' W ( -87.37842)


The benchmark is a disk set on the East side of Coast Guard Road, 62 m (203.4
ft) North of the NE corner of the Marquette Coast Guard Office Building, 25.8 m
(84.6 ft) East of the corner of the chain linked fence, 17.2 m (56.4 ft) East of
the NE corner of a garage, and 1.60 m (5.25 ft) North of a chain linked fence.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  6

                                                                                
Station ID: 9099018                         PUBLICATION DATE:  08/11/2017
Name:       MARQUETTE C.G, LAKE SUPERIOR                      
            MI
NOAA Chart: 14970                           Latitude:   46° 32.7' N (  46.54556)
USGS Quad:                                  Longitude:  87° 22.7' W ( -87.37861)


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


                         BENCH MARK STAMPING:   
                         DESIGNATION:          909 9018 LIGHTHOUSE N

MONUMENTATION:           Not specified (see descriptive text)  VM#:        13371
AGENCY:                                                        IDB PID#:  RK0420
SETTING CLASSIFICATION:  Stone doorsill foundation             OPUS PID:        
LATITUDE:   46° 32.8' N (  46.54653)          LONGITUDE:  87° 22.6' W ( -87.37622)


The BM is on the point of land North and East of inner end of the breakwater, on
the lighthouse, at main entrance to the light tower, directly under and to the
right of numerals 1866 carved in stone above the doorway, at the North end of
the stone doorsill, 1.95 meters (6.40 ft) NNW of SE corner of main entrance,
1.03 meters (3.38 ft) SSE of NE corner of doorsill, 0.48 meter (1.57 ft) North
of the centerline of the door, being the highest point at extreme outer edge of
the sill.



                         BENCH MARK STAMPING:   
                         DESIGNATION:          909 9018 BM

MONUMENTATION:           Bench Mark disk                       VM#:        13372
AGENCY:                  National Ocean Survey                 IDB PID#:  RK0451
SETTING CLASSIFICATION:  Small pad attached to foundation      OPUS PID:        
LATITUDE:   46° 32.7' N (  46.54558)          LONGITUDE:  87° 22.7' W ( -87.37908)


The bench mark is a disk set in a corner concrete pad at the SW corner of the
water level gauge house builing foundation, 91.3 m (299.5 ft) South of the SW
corner of the Coast Guard Office Building, 11.3 m (37.1 ft) East of the center
of the road, and 0.5 m (1.6 ft) SW of the SW corner of the NOS water level gauge
house.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  6

                                                                                
Station ID: 9099018                         PUBLICATION DATE:  08/11/2017
Name:       MARQUETTE C.G, LAKE SUPERIOR                      
            MI
NOAA Chart: 14970                           Latitude:   46° 32.7' N (  46.54556)
USGS Quad:                                  Longitude:  87° 22.7' W ( -87.37861)


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


                         BENCH MARK STAMPING:  9018 K 1995
                         DESIGNATION:          909 9018 K

MONUMENTATION:           Bench Mark disk                       VM#:        17799
AGENCY:                  National Ocean Service (NOS)          IDB PID#:  AH7272
SETTING CLASSIFICATION:  Rock outcrop                          OPUS PID:        
LATITUDE:   46° 32.8' N (  46.54650)          LONGITUDE:  87° 22.7' W ( -87.37872)


The bench mark is a disk set in granite rock outcroping on the North side of the
Marquette Coast Guard property, 36.9m (121.1 ft) WNW of the centerline of the
Coast Guard Radio/ Antenne Tower, 28.3m (92.8 ft) South of SW corner of The
Coast Guard garage, 13.8m (45.3 ft) East of the centerline of the road, 0.25m
(0.82 ft ) North of a witness post, 0.15m (0.49 ft) above ground level.



                         BENCH MARK STAMPING:  9018 M 2013
                         DESIGNATION:          909 9018 M

MONUMENTATION:           Bench Mark disk                       VM#:        20846
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Brick pump house                      OPUS PID:        
LATITUDE:   46° 32.7' N (  46.54467)          LONGITUDE:  87° 22.9' W ( -87.38111)


The bench mark is a disk 18.55 m (60.9 ft) SSW of the centerline of Lakeshore Dr
to the North face of the Brick Pump House, 11.35 m (37.2 ft) WNW of the East
face of the Brick Pump House, 6.78 m (22.2 ft) NNE of the South face of the
Brick Pump House, 1.35 m (4.4 ft) 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  5 of  6

                                                                                
Station ID: 9099018                         PUBLICATION DATE:  08/11/2017
Name:       MARQUETTE C.G, LAKE SUPERIOR                      
            MI
NOAA Chart: 14970                           Latitude:   46° 32.7' N (  46.54556)
USGS Quad:                                  Longitude:  87° 22.7' W ( -87.37861)


                             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  6 of  6

                                                                                
Station ID: 9099018                         PUBLICATION DATE:  08/11/2017
Name:       MARQUETTE C.G, LAKE SUPERIOR                      
            MI
NOAA Chart: 14970                           Latitude:   46° 32.7' N (  46.54556)
USGS Quad:                                  Longitude:  87° 22.7' W ( -87.37861)


                             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 9099018 Marquette C.G., MI

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