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: 9063090                         PUBLICATION DATE:  08/11/2017
Name:       FERMI POWER PLANT, LAKE ERIE                      
            MI
NOAA Chart: 14830                           Latitude:   41° 57.6' N (  41.96010)
USGS Quad:  STONY POINT                     Longitude:  83° 15.4' W ( -83.25690)


TO REACH THE NOS GAUGING STATION, IN MONROE COUNTY, MICHIGAN, FROM THE
INTERSECTION OF HWY 75 AND DIXIE HWY, PROCEED ESE ON DIXIE HWY FOR APPROX 5.0
MILES (8.0 KM) TO THE INTERSECTION WITH THE ENTRANCE TO THE ENRICO FERMI NUCLEAR
POWER PLANT, ON THE SOUTH SIDE OF DIXIE HWY, THEN PROCEED EAST ON PAVED FERMI
DRIVE FOR APPROX 1.0 MILES, TO THE PLANTS SECURITY GATE, THEN CONTINUE TO
PROCEED SE THRU GATE FOR APPROX 1.05 MILES (1.69 KM) TO THE NOS WATER LEVEL
GAUGE HOUSE.


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


                 PRIMARY BENCH MARK STAMPING:  POWER 1961
                         DESIGNATION:          906 3090 POWER

MONUMENTATION:           Survey disk                           VM#:        12851
AGENCY:                  Army Corp of Engineers                IDB PID#:  MC0873
SETTING CLASSIFICATION:  Screen well wall footing              OPUS PID:        
LATITUDE:   41° 57.6' N (  41.95972)          LONGITUDE:  83° 15.4' W ( -83.25711)


The bench mark is a disk on the SE corner of the screen wells of the intake
canal on the E face of the turbine building, 15.56m (51.05 ft) S of the NE
corner of the building, 9.45m (31.00 ft) N of the S inside corner of the old
loading dock, 6.88m (22.57 ft) W of the center line of the roadway, 1.3m (4.3
ft) from the E face of the building, 0.8ft (24.4 cm) from the SE corner of the
screen well, 0.3m (1.0 ft) above the ground being highest point over cross at
center of bronze disc set into the top of the concrete screen well.

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

                                                                                
Station ID: 9063090                         PUBLICATION DATE:  08/11/2017
Name:       FERMI POWER PLANT, LAKE ERIE                      
            MI
NOAA Chart: 14830                           Latitude:   41° 57.6' N (  41.96010)
USGS Quad:  STONY POINT                     Longitude:  83° 15.4' W ( -83.25690)


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


                         BENCH MARK STAMPING:   
                         DESIGNATION:          906 3090 ATOMIC USE

MONUMENTATION:           Bench Mark disk                       VM#:        12852
AGENCY:                  Army Corp of Engineers                IDB PID#:  MC0874
SETTING CLASSIFICATION:  Concrete wall (vertical)              OPUS PID:        
LATITUDE:   41° 57.6' N (  41.96006)          LONGITUDE:  83° 15.4' W ( -83.25703)


The bench mark is a disk at the NE corner and on the E face of the plant service
building, 17.0m (55.8 ft) SSW of the center column of the 200 ft (61.0 m) tall
water tower, 4.97m (16.31 ft) E of power pole that is nearest to the gauge
house, 0.62m (2.03 ft) N of the N edge of an electric service box, 0.60m (1.97
ft) from the NE corner, 0.80 m (2.62 ft) above the ground, being horizontal line
of cross at center of bronze disc set vertically into the concrete wall.



                         BENCH MARK STAMPING:  3090 E 1977
                         DESIGNATION:          906 3090 E

MONUMENTATION:           Tidal Station disk                    VM#:        12853
AGENCY:                  National Ocean Service (NOS)          IDB PID#:  MC0872
SETTING CLASSIFICATION:  Foundation                            OPUS PID:        
LATITUDE:   41° 57.6' N (  41.95950)          LONGITUDE:  83° 15.5' W ( -83.25761)


The bench mark is a disk set horizontally in the foundation of the destroyed
boiler building, 41.33m (135.60 ft) NW of a fire hydrant near the fence which
surrounds the high voltage transformers, 18.25m (59.88 ft) S of the S face of
building, 9.90m (32.48 ft) N of a 7-foot fence surrounding the high voltage
lines, 5.75m (18.86 ft) N of the center line of roadway, 1.52m (4.99 ft) NE of
the NE corner of a manhole cover concrete foundation. The concrete foundation
edge that the BM is set on, has been covered with 0.1 m (0.3 ft) of hard packed
gravel and is being used as a parking lot and refuse area. An aluminum access
lid has been placed over BM and is flush with current ground surface.

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

                                                                                
Station ID: 9063090                         PUBLICATION DATE:  08/11/2017
Name:       FERMI POWER PLANT, LAKE ERIE                      
            MI
NOAA Chart: 14830                           Latitude:   41° 57.6' N (  41.96010)
USGS Quad:  STONY POINT                     Longitude:  83° 15.4' W ( -83.25690)


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


                         BENCH MARK STAMPING:  EXHIBITS
                         DESIGNATION:          906 3090 EXHIBITS USLS

MONUMENTATION:           Metal Rod                             VM#:        12854
AGENCY:                  National Geodetic Survey              IDB PID#:  MC0871
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   41° 57.6' N (  41.95947)          LONGITUDE:  83° 15.6' W ( -83.25942)


The bench mark is a copper-clad steel rod at the NE corner of the exhibits
building, in line with the N face, 22.48m (73.75 ft) N of the center line of
main roadway leading into plant, 16.90m (55.45 ft) S of the most S rail of the
railroad tracks, and 0.74m (2.43 ft) E of the NE corner of the building, 0.15m
(0.49 ft) below the ground surface, protected by 5" diameter PVC sleeve and
aluminum access lid, being highest point on top of a 5/8-inch diameter copper
coated steel rod, 2.4m (7.9 ft) long.



                         BENCH MARK STAMPING:  3090 F 1983
                         DESIGNATION:          906 3090 F

MONUMENTATION:           Survey disk                           VM#:        12855
AGENCY:                  National Ocean Service (NOS)          IDB PID#:  AB6931
SETTING CLASSIFICATION:  Concrete foundation                   OPUS PID:        
LATITUDE:   41° 57.6' N (  41.95989)          LONGITUDE:  83° 15.5' W ( -83.25831)


The bench mark is a disk 22.85m (74.97 ft) W of the W face of the turbine
building, 14.8m (48.6 ft) S of SW corner of Fermi 1 office building, 10.4m (34.2
ft) SE of center of flagpole, and 0.62m (2.03 ft) above ground level, being
highest point on a bronze disk set flush in SW corner of concrete foundation
housing pumps for oily waste pump pit.

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

                                                                                
Station ID: 9063090                         PUBLICATION DATE:  08/11/2017
Name:       FERMI POWER PLANT, LAKE ERIE                      
            MI
NOAA Chart: 14830                           Latitude:   41° 57.6' N (  41.96010)
USGS Quad:  STONY POINT                     Longitude:  83° 15.4' W ( -83.25690)


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


                         BENCH MARK STAMPING:  3090 G 1997
                         DESIGNATION:          906 3090 G

MONUMENTATION:           Bench Mark disk                       VM#:        17067
AGENCY:                  National Ocean Service (NOS)          IDB PID#:  AH9238
SETTING CLASSIFICATION:  6' x 8' concrete foundation           OPUS PID:        
LATITUDE:   41° 57.5' N (  41.95900)          LONGITUDE:  83° 15.7' W ( -83.26111)


The bench mark is a disk is on the N side of Fermi drive just S of the
exhibits/visitor center, on SW corner of a 6' x 8' concrete foundation, housing
2 sewer access mains,  30.6m (100.4 ft) ENE of power pole no.4857 which is on
the S side of Fermi Dr, 31.92m (104.72 ft) WNW of power pole no.4858 located on
the S side of Fermi Dr., 4.1m (13.5 ft) N of center line of Fermi Dr., 2.7m (8.9
ft) S of most S rail of R/R tracks running E to W, being highest point over
center of bronze disc set flush with concrete.



                         BENCH MARK STAMPING:  3090 H 2013
                         DESIGNATION:          906 3090 H

MONUMENTATION:           Survey disk                           VM#:        20723
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Gauge house foundation                OPUS PID:        
LATITUDE:   41° 57.6' N (  41.96003)          LONGITUDE:  83° 15.4' W ( -83.25694)


The bench mark is a disc set flush in the NW most corner in the foundation of
the gauge house. 23.86 m (78.3 ft) SE of the center pillar of a water tower,
9.28m (30.4 ft) NE of the N face of bulding adjacent to gauge house, 1.52 m (5.0
ft) SW of the sea wall, and 0.36 m (1.2 ft) N of the NE corner of gauge house.





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: 9063090                         PUBLICATION DATE:  08/11/2017
Name:       FERMI POWER PLANT, LAKE ERIE                      
            MI
NOAA Chart: 14830                           Latitude:   41° 57.6' N (  41.96010)
USGS Quad:  STONY POINT                     Longitude:  83° 15.4' W ( -83.25690)


                             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: 9063090                         PUBLICATION DATE:  08/11/2017
Name:       FERMI POWER PLANT, LAKE ERIE                      
            MI
NOAA Chart: 14830                           Latitude:   41° 57.6' N (  41.96010)
USGS Quad:  STONY POINT                     Longitude:  83° 15.4' W ( -83.25690)


                             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/.