U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 9 Station ID: 9014080 PUBLICATION DATE: 08/11/2017 Name: ST. CLAIR STATE POLICE, ST. CLAIR RIVER MI NOAA Chart: 14852 Latitude: 42° 48.7' N ( 42.81222) USGS Quad: Longitude: 82° 29.1' W ( -82.48556) TO REACH THE NOS GAUGING STATION, IN ST CLAIR, ST CLAIR COUNTY, MICHIGAN, FROM THE INTERSECTION OF CLINTON AVE AND M-29, PROCEED SOUTH ON M-29 FOR APPROX 0.55 MILE (0.89 KM) TO THE BM ON THE EAST SIDE OF M-29, BEHIND A RESIDENCE LOCATED AT 1419 RIVERSIDE DRIVE (STATE HIGHWAY 29), 0.5 MILE (0.8 KM) SOUTH OF THE STATE HIGHWAY 29 DRAW BRIDGE OVER PINE RIVER, THE GAUGE HOUSE IS LOCATED BEHIND THE RESIDENCE. G R E A T L A K E S B E N C H M A R K S PRIMARY BENCH MARK STAMPING: A 237 1980 DESIGNATION: A 237 MONUMENTATION: Metal Rod VM#: 12983 AGENCY: National Geodetic Survey IDB PID#: NE0943 SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID: LATITUDE: 42° 48.8' N ( 42.81258) LONGITUDE: 82° 29.1' W ( -82.48556) The primary bench mark is a stainless steel rod on the property of the 1417 Riverside Drive residence, 80 m (262.5 ft) E of the centerline of Highway 29, 34.2 m (112.2 ft) N of the NW corner of the gauge house, 34.1 m (111.9 ft) SSW of the inside weld joint of the N corner of the steel bulkhead on the river side of the property, 20.1 m (65.9 ft) ENE of NE corner of house 1419 Riverside Drive, and 9.95 m (32.64 ft) W of the E face of steel bulkhead, set to a depth of 9.7 m (31.8 ft) in a sleeve extending to a depth of 3.0 m (9.8 ft) encased in a pipe flush with the ground. Mark is 1 m (3.3 ft) below ground, and has a NOAA witness post. Sleeve is a 6" PVC pipe with aluminum access lid and concrete kick block.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 9 Station ID: 9014080 PUBLICATION DATE: 08/11/2017 Name: ST. CLAIR STATE POLICE, ST. CLAIR RIVER MI NOAA Chart: 14852 Latitude: 42° 48.7' N ( 42.81222) USGS Quad: Longitude: 82° 29.1' W ( -82.48556) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: POLICE DESIGNATION: 901 4080 POLICE MONUMENTATION: Survey disk VM#: 12984 AGENCY: National Geodetic Survey IDB PID#: NE0942 SETTING CLASSIFICATION: Concrete foundation OPUS PID: LATITUDE: 42° 48.7' N ( 42.81208) LONGITUDE: 82° 29.1' W ( -82.48564) The bench mark is a disk 80 m (262.5 ft) E of the center line of Highway 29, set in the concrete foundation of the NOAA water level gauge house, 15.8 m (51.8 ft) W of the E face of the steel bulkhead, 5.2 m (17.1 ft) ENE of utility pole number 30 G 6, 2.5 m (8.2 ft) S of the NW corner of the gauge house, 0.14 m (0.46 ft) W of the SW corner of the gauge house, being a standard disc 0.9 m (3.0 ft) below the ground with 5" PVC sleeve with aluminum access cover flush with the ground, stamped "Police".
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 9 Station ID: 9014080 PUBLICATION DATE: 08/11/2017 Name: ST. CLAIR STATE POLICE, ST. CLAIR RIVER MI NOAA Chart: 14852 Latitude: 42° 48.7' N ( 42.81222) USGS Quad: Longitude: 82° 29.1' W ( -82.48556) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: DESIGNATION: 901 4080 MSP MONUMENTATION: Metal Rod VM#: 12985 AGENCY: National Geodetic Survey IDB PID#: NE0015 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 42° 48.8' N ( 42.81264) LONGITUDE: 82° 29.2' W ( -82.48606) The bench mark is a copper-clad steel rod 37.7 m (123.7 ft) SSE of the first of 3 large power poles running N and S along the E side of the highway, the first being the most N power pole number S25CD811, 37.6 m (123.4 ft) NNE of the third and most S of the poles numbered S25CD812, 21.2 m (69.6 ft) NNW of the NW corner of house 1419 Riverside Drive, 14.7 m (48.2 ft) E of the center line of the highway, 7.6 m (24.9 ft) E of the E edge of a drain culvert, 5.2 m (17.1 ft) ESE of the face of the second power pole number DE8260BB of the three power poles, being the highest pt on top of a 5/8-inch copper-coated steel rod, 6.1 m (20.0 ft) long. Mark is 0.6 m (2.0 ft) below ground. With a 5-inch PVC pipe and aluminum access cover, surrounded of a mass of concrete flush with the ground, stamped "MSP".
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 9 Station ID: 9014080 PUBLICATION DATE: 08/11/2017 Name: ST. CLAIR STATE POLICE, ST. CLAIR RIVER MI NOAA Chart: 14852 Latitude: 42° 48.7' N ( 42.81222) USGS Quad: Longitude: 82° 29.1' W ( -82.48556) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: ANGLER DESIGNATION: 901 4080 ANGLER MONUMENTATION: Survey disk VM#: 12986 AGENCY: National Geodetic Survey IDB PID#: NE0014 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 42° 48.8' N ( 42.81256) LONGITUDE: 82° 29.2' W ( -82.48683) The bench mark is a disk set N of the NE corner of the Angler Rod company building, 45.4 m (148.9 ft) W of the center line of highway 29, 29.1 m (95.5 ft) SE of power pole number 634 with a transformer, 2.4 m (7.9 ft) N of the NE corner of the building, and 0.70 m (2.30 ft) W of the W edge of the sidewalk leading to the front of the building, being highest point on top of a 5/8-inch diameter copper-coated steel rod, 4.9 m (16.1 ft) long, encased in a 5-inch PVC pipe with an aluminum access cover. Mark is 6 inches below ground, access cover is flush with ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 9 Station ID: 9014080 PUBLICATION DATE: 08/11/2017 Name: ST. CLAIR STATE POLICE, ST. CLAIR RIVER MI NOAA Chart: 14852 Latitude: 42° 48.7' N ( 42.81222) USGS Quad: Longitude: 82° 29.1' W ( -82.48556) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: 4080 F 1993 DESIGNATION: 901 4080 F MONUMENTATION: Bench Mark disk VM#: 12987 AGENCY: National Ocean Service (NOS) IDB PID#: AC9129 SETTING CLASSIFICATION: Stainless steel rod w/o sleeve OPUS PID: LATITUDE: 42° 49.0' N ( 42.81594) LONGITUDE: 82° 29.2' W ( -82.48594) The bench mark is a disk on the property of the Akzo Salt Company, NNE of the intersection of Riverside Drive and Laure Street, 9.05 m (29.69 ft) ESE of the center lane of Laure Street, 21.1 m (69.2 ft) SE of power pole number 74, 17.7 m (58.1 ft) WSW of the SE corner of aluminum storage shed belonging to Akzo Salt Company, 0.95 m (3.12 ft) SSW of the SW corner of aluminum storage shed, being highest point on top of bronze disc crimped atop a 5/8-inch diameter stainless steel rod driven 4.9 m (16.1 ft) to refusal, and encased in a 5-inch PVC pipe with aluminum access cover.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 9 Station ID: 9014080 PUBLICATION DATE: 08/11/2017 Name: ST. CLAIR STATE POLICE, ST. CLAIR RIVER MI NOAA Chart: 14852 Latitude: 42° 48.7' N ( 42.81222) USGS Quad: Longitude: 82° 29.1' W ( -82.48556) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: RCH C-32A 1939 DESIGNATION: 901 4080 C 32 A MONUMENTATION: Survey disk VM#: 12988 AGENCY: US Lake Survey IDB PID#: NE0018 SETTING CLASSIFICATION: Concrete foundation OPUS PID: LATITUDE: 42° 49.0' N ( 42.81628) LONGITUDE: 82° 29.2' W ( -82.48678) The bench mark is a disk set vertically 0.9 m (3.0 ft) above the ground in the S face of the concrete foundation of the Akzo Salt Company building at 1213 Riverside Avenue (State Highway 29) , a gray single story building at the NE corner of the intersection of Laure Street and State Highway 29, 30.5 m (100.1 ft) E of the center line of the highway, 15.2 m (49.9 ft) E of the SW corner of the building, 5.64 m (18.50 ft) W of a electric meter on the S face of the building, 8.0 m (26.2 ft) N of the center line of gravel road on S side of building.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 9 Station ID: 9014080 PUBLICATION DATE: 08/11/2017 Name: ST. CLAIR STATE POLICE, ST. CLAIR RIVER MI NOAA Chart: 14852 Latitude: 42° 48.7' N ( 42.81222) USGS Quad: Longitude: 82° 29.1' W ( -82.48556) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: DESIGNATION: IBM 43 IBC MONUMENTATION: Survey disk VM#: 12989 AGENCY: IDB PID#: NE0012 SETTING CLASSIFICATION: OPUS PID: LATITUDE: 42° 48.5' N ( 42.80856) LONGITUDE: 82° 29.2' W ( -82.48592) The bench mark is a disk at residence 1613 Riverside Road, between 2 homes, 11.30 m (37.07 ft) W of the W edge of the steel bulkhead (breakwater) at the river's edge, 8.70 m (28.54 ft) E of the NE corner of house 1617, 5.90 mm (19.36 ft) SW of house 1613, projecting approx 0.60 meters (1.97 ft) above the ground, being highest point on top of copper bolt set into top of a concrete monument, forming international boundary monument no. 43. 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: 9014080 PUBLICATION DATE: 08/11/2017 Name: ST. CLAIR STATE POLICE, ST. CLAIR RIVER MI NOAA Chart: 14852 Latitude: 42° 48.7' N ( 42.81222) USGS Quad: Longitude: 82° 29.1' W ( -82.48556) 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: 9014080 PUBLICATION DATE: 08/11/2017 Name: ST. CLAIR STATE POLICE, ST. CLAIR RIVER MI NOAA Chart: 14852 Latitude: 42° 48.7' N ( 42.81222) USGS Quad: Longitude: 82° 29.1' W ( -82.48556) 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/.