Bench Mark Sheet for 9044020, Gibraltar 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  9

                                                                                
Station ID: 9044020                         PUBLICATION DATE:  08/11/2017
Name:       GIBRALTAR, DETROIT RIVER                          
            MI
NOAA Chart: 14848                           Latitude:   42°  5.5' N (  42.09169)
USGS Quad:                                  Longitude:  83° 11.2' W ( -83.18669)


TO REACH THE NOS GAUGING STATION, IN GIBRALTAR, WAYNE COUNTY, MICHIGAN, FROM THE
INTERSECTION OF GIBRALTAR AND ADAMS ST, PROCEED SOUTH ON ADAMS ST FOR APPPROX
0.30 MILE (0.48 KM) TO THE INTERSECTION WITH GRANDVIEW ST, THEN PROCEED EAST ON
GRANDVIEW ST FOR APPROX 0.05 MILE (0.08 KM) TO ITS INTERSECTION WITH LOWELL ST.
THE NOS WATER LEVEL GAUGING STATION IS AT 29901 LOWELL ST., WHICH IS ALSO AT THE
SE EDGE OF PROPERTY OF RESIDENCE ON 29879 LOWELL STREET.


                    G R E A T  L A K E S   B E N C H   M A R K S
                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  9

                                                                                
Station ID: 9044020                         PUBLICATION DATE:  08/11/2017
Name:       GIBRALTAR, DETROIT RIVER                          
            MI
NOAA Chart: 14848                           Latitude:   42°  5.5' N (  42.09169)
USGS Quad:                                  Longitude:  83° 11.2' W ( -83.18669)


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


                 PRIMARY BENCH MARK STAMPING:  M 234 1980
                         DESIGNATION:          M 234

MONUMENTATION:           Flange-encased Rod                    VM#:        12932
AGENCY:                  National Geodetic Survey              IDB PID#:  NE0857
SETTING CLASSIFICATION:  Stainless steel rod in sleeve         OPUS PID:        
LATITUDE:   42°  5.5' N (  42.09117)          LONGITUDE:  83° 11.2' W ( -83.18633)


The bench mark is a stainless steel rod at the junction of Grandview and Lowell
Streets, 12.5 m (41.0 ft) ENE of the NE corner of the most N addition on a
2-story house, 24.7 m (81.0 ft) W of the SW corner of the NOAA gauge house, 2.6
m (8.5 ft) E of E face of power pole with two guy wires and pole identification
no. burned into wood B-11-96 SPSK 5-40, 2.33 m (7.64 ft) NE of BM Lowell, 1.20 m
(3.94 ft) NE of witness post, accessed through an aluminum cover flush with the
ground.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  9

                                                                                
Station ID: 9044020                         PUBLICATION DATE:  08/11/2017
Name:       GIBRALTAR, DETROIT RIVER                          
            MI
NOAA Chart: 14848                           Latitude:   42°  5.5' N (  42.09169)
USGS Quad:                                  Longitude:  83° 11.2' W ( -83.18669)


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


                         BENCH MARK STAMPING:  LOWELL
                         DESIGNATION:          904 4020 LOWELL

MONUMENTATION:           Metal Rod                             VM#:        12935
AGENCY:                  National Geodetic Survey              IDB PID#:  NE0510
SETTING CLASSIFICATION:  Copper-clad steel rod w/o sleeve      OPUS PID:        
LATITUDE:   42°  5.5' N (  42.09108)          LONGITUDE:  83° 11.2' W ( -83.18631)


The bench mark is a copper-clad steel rod 26.1 m (85.6 ft) W of the NW corner of
NOAA gauge house, 10.1 m (33.1 ft) N of the NE corner of two story frame house
at 29911 Adams Drive, 2.35 m (7.71 ft) SW of benchmark M-234, 1.4 m (4.6 ft) S
of a street light pole identification no. burned into pole, B-11-96 SPSK 5-40,
2.0 m (6.6 ft) N of the ground end of the guy wire anchor to pole, 1.20 m (3.94
ft) SE of SE face of pole B-11-96 SPSK 5-40, 1.10 m (3.61 ft) SW of a witness
post, 0.6 m (2.0 ft) above the level of the streets, being the top of a 5/8-inch
copper coated steel rod 2.3 m (7.5 ft) long, 24.4 cm underground. Inside an
aluminum access cover.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  9

                                                                                
Station ID: 9044020                         PUBLICATION DATE:  08/11/2017
Name:       GIBRALTAR, DETROIT RIVER                          
            MI
NOAA Chart: 14848                           Latitude:   42°  5.5' N (  42.09169)
USGS Quad:                                  Longitude:  83° 11.2' W ( -83.18669)


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


                         BENCH MARK STAMPING:  ADAMS
                         DESIGNATION:          904 4020 ADAMS

MONUMENTATION:           Flange-encased Rod                    VM#:        12936
AGENCY:                  National Geodetic Survey              IDB PID#:  NE0513
SETTING CLASSIFICATION:  Galvanized steel pipe in sleeve       OPUS PID:        
LATITUDE:   42°  5.5' N (  42.09083)          LONGITUDE:  83° 11.2' W ( -83.18719)


The bench mark is a galvanized steel pipe 15.5 m (50.9 ft) SE of the center of
the intersection of Adams Drive and Grandview Street, 12.2 m (40.0 ft) E of the
center line of Adams Drive, 9.6 m (31.5 ft) S of the center line of Grandview
Street, 3.0 m (9.8 ft) NE of the NE corner of the E one of two 1 1/2-foot square
6-foot high concrete post, 3.8 m (12.5 ft) W of a 24-inch maple tree, 1.4 m (4.6
ft) N of an E-W fence line, a stainless steel plug on top of a 3/8 inch
galvanized steel pipe 2.44 m (8.01 ft) long, 0.3 m (1.0 ft) underground
protected by a 6-inch concrete pipe with a aluminum access cover which is flush
with the ground, with NOAA witness post.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  9

                                                                                
Station ID: 9044020                         PUBLICATION DATE:  08/11/2017
Name:       GIBRALTAR, DETROIT RIVER                          
            MI
NOAA Chart: 14848                           Latitude:   42°  5.5' N (  42.09169)
USGS Quad:                                  Longitude:  83° 11.2' W ( -83.18669)


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


                         BENCH MARK STAMPING:  D 54 1932 MCK
                         DESIGNATION:          904 4020 D 54

MONUMENTATION:           Survey disk                           VM#:        12937
AGENCY:                  US Lake Survey                        IDB PID#:  NE0509
SETTING CLASSIFICATION:  Water Table                           OPUS PID:        
LATITUDE:   42°  5.4' N (  42.09081)          LONGITUDE:  83° 11.3' W ( -83.18808)


The bench mark is a disk NE corner of the intersection of Munro Avenue and
Grandview Street, set vertically in the S face of the concrete water table of a
two story gray brick home at 29885 Munro Avenue, 23.3 m (76.4 ft) ENE of fire
hydrant at the corner of Grandview and Munro, 15.5 m (50.9 ft) N of the
centerline of Grandview Street, 1.1 m (3.6 ft) W of the SE corner of the home,
1.0 m (3.3 ft) above the level of the ground and about 1.8 m (5.9 ft) above the
level of the street. Residence was re-sided during 1998. Hole was cut into
siding by owner so that survey disk could be accessed. Disk is now countersunk
2.5 in. into siding, extremely hard to level to.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  9

                                                                                
Station ID: 9044020                         PUBLICATION DATE:  08/11/2017
Name:       GIBRALTAR, DETROIT RIVER                          
            MI
NOAA Chart: 14848                           Latitude:   42°  5.5' N (  42.09169)
USGS Quad:                                  Longitude:  83° 11.2' W ( -83.18669)


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


                         BENCH MARK STAMPING:   
                         DESIGNATION:          904 4020 REYNOLDS

MONUMENTATION:           Metal Rod                             VM#:        12938
AGENCY:                                                        IDB PID#:  NE0514
SETTING CLASSIFICATION:  Metal rod driven into the ground      OPUS PID:        
LATITUDE:   42°  5.4' N (  42.08969)          LONGITUDE:  83° 11.2' W ( -83.18675)


The bench mark is a metal rod driven into the ground in the SW corner of the
yard for a residence at 30025 Adams Drive, 10.4 m (34.1 ft) E of the center line
of Adams Drive, 5.0 m (16.4 ft) S of the center line of driveway leading E to
residence, 1.1 m (3.6 ft) E of the N-S fence line, 0.4 m (1.3 ft) N of an E-W
fence line, 0.9 m (3.0 ft) above the level of the drive, being a 1 1/4 inch
square rod driven to a depth of 3.0 m (9.8 ft) and projecting .05 m (0.16 ft)
above the level of the ground.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of  9

                                                                                
Station ID: 9044020                         PUBLICATION DATE:  08/11/2017
Name:       GIBRALTAR, DETROIT RIVER                          
            MI
NOAA Chart: 14848                           Latitude:   42°  5.5' N (  42.09169)
USGS Quad:                                  Longitude:  83° 11.2' W ( -83.18669)


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


                         BENCH MARK STAMPING:  582.154 H 115 X 1934
                         DESIGNATION:          H 115 X

MONUMENTATION:           Bench Mark disk                       VM#:        12939
AGENCY:                  US Coast and Geodetic Survey          IDB PID#:  NE0516
SETTING CLASSIFICATION:  Bridge abutment/sidewalk              OPUS PID:        
LATITUDE:   42°  5.7' N (  42.09508)          LONGITUDE:  83° 11.4' W ( -83.19069)


The bench mark is a disk 28.97 m (95.05 ft) W of the E edge of the walkway, 7.60
m (24.93 ft) N of the center line of Gibraltar Road, 1.90 m (6.23 ft) E of the W
end of the N concrete guard rail base, 1.83 m (6.00 ft) N of the S edge of the
walkway, 0.15 m (0.49 ft) S of the N edge of the concrete ornamental handrail,
and 0.69 m (2.26 ft) above the level of the road.



                         BENCH MARK STAMPING:  4020 E 2006
                         DESIGNATION:          904 4020 E

MONUMENTATION:           Bench Mark disk                       VM#:        18302
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  NOS Gauge house foundation            OPUS PID:        
LATITUDE:   42°  5.5' N (  42.09086)          LONGITUDE:  83° 11.2' W ( -83.18600)


The bench mark is a disk set in the SW corner of the NOS gauge house foundation,
48.5 m (159.1 ft) E of the NE corner of the residence 29879 on Lowell St, 38.50
m (126.31 ft) NE of a gas main access cover located at the intersection of
Lowell St and Davis St, 2.60 m (8.53 ft) N of utility pole DE-85, set 0.065 m
(0.213 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  8 of  9

                                                                                
Station ID: 9044020                         PUBLICATION DATE:  08/11/2017
Name:       GIBRALTAR, DETROIT RIVER                          
            MI
NOAA Chart: 14848                           Latitude:   42°  5.5' N (  42.09169)
USGS Quad:                                  Longitude:  83° 11.2' W ( -83.18669)


                             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: 9044020                         PUBLICATION DATE:  08/11/2017
Name:       GIBRALTAR, DETROIT RIVER                          
            MI
NOAA Chart: 14848                           Latitude:   42°  5.5' N (  42.09169)
USGS Quad:                                  Longitude:  83° 11.2' W ( -83.18669)


                             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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