U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 9 Station ID: 9063063 PUBLICATION DATE: 08/11/2017 Name: CLEVELAND, LAKE ERIE OH NOAA Chart: 14839 Latitude: 41° 32.5' N ( 41.54086) USGS Quad: Longitude: 81° 38.1' W ( -81.63547) TO REACH THE NOS GAUGING STATION IN CLEVELAND, CUYAHOGA COUNTY, OHIO, FROM THE INTERSECTION OF HWY 90/2 AND MARTIN LUTHER KING JR BLVD, PROCEED ON M.L. KING JR BLVD TO ITS INTERSECTION WITH N MARGINAL DRIVE, THEN PROCEED WEST ON N MARGINAL DR FOR APPROX 0.05 MILE (0.08 KM) TO THE ENTRANCE, ON THE NORTH SIDE OF DRIVE, TO THE LAKEFRONT STATE PARK AND GORDON BOAT RAMP, BETWEEN THE NORTH END OF E 72ND STREET AND M.L. KING JR. BOULEVARD, THEN PROCEED NW ON PAVED ENTRANCE RD FOR APPROX 0.15 MILE (0.241 KM) TO THE NOS GAUGE HOUSE. 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: 9063063 PUBLICATION DATE: 08/11/2017 Name: CLEVELAND, LAKE ERIE OH NOAA Chart: 14839 Latitude: 41° 32.5' N ( 41.54086) USGS Quad: Longitude: 81° 38.1' W ( -81.63547) G R E A T L A K E S B E N C H M A R K S PRIMARY BENCH MARK STAMPING: G 321 1981 DESIGNATION: G 321 MONUMENTATION: Flange-encased Rod VM#: 12817 AGENCY: National Geodetic Survey IDB PID#: MB1563 SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID: LATITUDE: 41° 32.4' N ( 41.54000) LONGITUDE: 81° 38.1' W ( -81.63417) The benchmark is a stainless steel rod 117.34m (384.97 ft) SSE of the NOS gauge house (a 7 foot (2.1 m) square brick building) , 40.78m (133.79 ft) S of an aluminum lamp post, 16.10m (52.82 ft) SE of the SE edge of the sidewalk leading into the park, 11.37m (37.30 ft) S of a paved bike path, with 5-inch PVC pipe and aluminum access cover which is stamped "G 321" surrounded by a mass of concrete flush with the ground. Marked with witness post. BENCH MARK STAMPING: 906 3063 STEPS DESIGNATION: 906 3063 STEPS MONUMENTATION: Metal Rod VM#: 12818 AGENCY: National Geodetic Survey IDB PID#: MB1562 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 41° 32.4' N ( 41.53967) LONGITUDE: 81° 38.0' W ( -81.63361) The bench mark is a copper-clad steel rod W of the bottom step of the concrete stairs leading uphill to a public bridge crossing over Interstate 90 for access to Gordon City Park and Aquarium, 19.20m (62.99 ft) W of a telephone pole marked "TLCOB 2nd.V790", 2.15m (7.05 ft) S of the S curb of the road, 0.64m (2.10 ft) W of the concrete retaining wall of the stairs, being a 5/8-inch copper-coated steel rod, 3.96m (12.99 ft) long. Note - in 1981 the mark was encased in a 5-inch PVC pipe with an NGS aluminum access cover, stamped "906 3063 Steps". Marked with witness post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 9 Station ID: 9063063 PUBLICATION DATE: 08/11/2017 Name: CLEVELAND, LAKE ERIE OH NOAA Chart: 14839 Latitude: 41° 32.5' N ( 41.54086) USGS Quad: Longitude: 81° 38.1' W ( -81.63547) 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 3063 LIBERTY MONUMENTATION: Bolt VM#: 12819 AGENCY: IDB PID#: MB1567 SETTING CLASSIFICATION: Abutment OPUS PID: LATITUDE: 41° 32.4' N ( 41.53942) LONGITUDE: 81° 37.9' W ( -81.63172) The bench mark is a brass coated closet bolt set vertically in the N face of the W abutment of the bridge, 7.62m (25.00 ft) W of the center line of the S-bound lane of the Blvd, 3.36m (11.02 ft) W of E edge of sidewalk, 2.60m (8.53 ft) S of a telephone pole marked "SWP 11-85 SPP 3-45", 0.99m (3.25 ft) E of the W inside corner of abutment, 0.3m (1.0 ft) W of the E edge of the abutment and 1.57m (5.15 ft) above the sidewalk. BENCH MARK STAMPING: 3063 F 1979 DESIGNATION: 906 3063 F MONUMENTATION: Bench Mark disk VM#: 12820 AGENCY: National Ocean Service (NOS) IDB PID#: MB1564 SETTING CLASSIFICATION: Concrete catch basin OPUS PID: LATITUDE: 41° 32.4' N ( 41.54047) LONGITUDE: 81° 38.1' W ( -81.63464) The bench mark is a disk in the top of the NW corner of a concrete catch basin, which is in a grassy area between the W end of the entrance to the S parking area for boat launching ramps and an entrance road leading to the boat ramps, 54.75m (179.63 ft) SE of the NW corner of the NOS water level gauging house, 27.28m (89.50 ft) NW of a metal lamp post, and 13.21m (43.34 ft) S of a stop sign.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 9 Station ID: 9063063 PUBLICATION DATE: 08/11/2017 Name: CLEVELAND, LAKE ERIE OH NOAA Chart: 14839 Latitude: 41° 32.5' N ( 41.54086) USGS Quad: Longitude: 81° 38.1' W ( -81.63547) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: 3063 G 1982 DESIGNATION: 906 3063 G MONUMENTATION: Bench Mark disk VM#: 12821 AGENCY: National Ocean Service (NOS) IDB PID#: AB6923 SETTING CLASSIFICATION: Concrete foundation of drain OPUS PID: LATITUDE: 41° 32.4' N ( 41.54044) LONGITUDE: 81° 38.0' W ( -81.63361) The bench mark is a disk on the S edge of most N parking lot, near the restrooms, in the most N median of the parking lot, 91.1m (298.9 ft) N of concrete steps going uphill to a public walkway crossing over Interstate 90 for access to Gordon City Park and Aquarium, 42.35m (138.94 ft) from the W face of foundation of light post no. G17, 3.28m (10.76 ft) N of the S edge of the S parking area, 2.8m (9.2 ft) S of the S edge of most N parking area, being the high point on NOS disc set flush in the W corner of the concrete foundation of drain, stamped "3063 G 1982". BENCH MARK STAMPING: DESIGNATION: 906 3063 DON MONUMENTATION: Survey disk VM#: 12822 AGENCY: US Army Corps of Engineers IDB PID#: MB1566 SETTING CLASSIFICATION: Concrete floor OPUS PID: LATITUDE: 41° 32.5' N ( 41.54086) LONGITUDE: 81° 38.1' W ( -81.63547) The bench mark is a disk in the top of the concrete floor of the NOS gauge house (a 7 foot (2.1 m) square brick building) located on the SW side of the boat launching ramps, 1.75m (5.74 ft) S of the N inside face of the NOS water level gauging house, 0.3m (1.0 ft) NW of the bottom door sill of the gage house, 0.4m (1.3 ft) NW of the S inside corner of the gage house. Note - no stamping on disk.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 9 Station ID: 9063063 PUBLICATION DATE: 08/11/2017 Name: CLEVELAND, LAKE ERIE OH NOAA Chart: 14839 Latitude: 41° 32.5' N ( 41.54086) USGS Quad: Longitude: 81° 38.1' W ( -81.63547) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: 3063 E 1978 DESIGNATION: 906 3063 E MONUMENTATION: Survey disk VM#: 12823 AGENCY: National Ocean Service (NOS) IDB PID#: MB1565 SETTING CLASSIFICATION: Concrete walk of boat ramp OPUS PID: LATITUDE: 41° 32.5' N ( 41.54097) LONGITUDE: 81° 38.1' W ( -81.63503) The bench mark is a disk in the top of the SE end of the concrete walkway of the SW one of six (6) boat launching ramps, 13.45m (44.13 ft) ENE of the E corner of the NOS water level gage house, 8.14m (26.71 ft) N of a pay phone, 0.39m (1.28 ft) N of the NE face of the metal bulkhead of the SW boat ramp. Note - mark was previously covered up by a new concrete cap on walkway to raise walkway due to high water, due to low water conditions the cap was removed. High water conditions in the future may result in another cap being poured to bring walkway height back up.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 9 Station ID: 9063063 PUBLICATION DATE: 08/11/2017 Name: CLEVELAND, LAKE ERIE OH NOAA Chart: 14839 Latitude: 41° 32.5' N ( 41.54086) USGS Quad: Longitude: 81° 38.1' W ( -81.63547) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: E 322 1981 DESIGNATION: E 322 MONUMENTATION: Bench Mark disk VM#: 12826 AGENCY: National Geodetic Survey IDB PID#: MB1561 SETTING CLASSIFICATION: Abutment OPUS PID: LATITUDE: 41° 32.0' N ( 41.53397) LONGITUDE: 81° 38.3' W ( -81.63869) The bench mark is a disk on the N end of the E abutment of the Conrail railroad overpass bridge, on E 72nd Street near Gordon Park, set vertically in the W face of the abutment, 14.06m (46.13 ft) SE of the center of a manhole cover on top of a street drain along the northbound lane of E 72nd Street, 5.72m (18.77 ft) E of the center line of the N-bound lane of E 72nd Street, 0.51m (1.67 ft) S of the N end of the abutment and 1.00m (3.28 ft) above the sidewalk. BENCH MARK STAMPING: 906 3063 H 2003 DESIGNATION: 906 3063 H MONUMENTATION: Flange-encased Rod VM#: 18298 AGENCY: National Geodetic Survey IDB PID#: SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 41° 32.4' N ( 41.54022) LONGITUDE: 81° 38.1' W ( -81.63481) The bench mark is a stainless steel rod along the S fence line that separates the state park and a white bricked boat house, 62.40m (204.72 ft) SSE from the SW corner of the NOS water level gauging house, 27.75m (91.04 ft) W from the SE corner of the fence post, 24.30m (79.72 ft) SW from the center line of the park entrance street leading to the NOS water level gauging house and boat ramps, 3.75m (12.30 ft) NE of the fence line that separates the S edge of the state park and boat house, 3.72m (12.20 ft) NE of a witness post, mark is encased in a 5 inch PVC sleeve with an access cover set in a concrete kick block.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 9 Station ID: 9063063 PUBLICATION DATE: 08/11/2017 Name: CLEVELAND, LAKE ERIE OH NOAA Chart: 14839 Latitude: 41° 32.5' N ( 41.54086) USGS Quad: Longitude: 81° 38.1' W ( -81.63547) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: F 322 1981 DESIGNATION: F 322 MONUMENTATION: Metal Rod VM#: 21215 AGENCY: National Geodetic Survey IDB PID#: MB1568 SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 41° 32.5' N ( 41.54111) LONGITUDE: 81° 37.5' W ( -81.62527) The bench mark is a stainless steel rod 17.80m (58.4 ft) SSE of a light pole with a stop sign numberd 'KWP 11-97 PA.3', 14.33m (47.0 ft) NW of the center line of hte boulevard, 7.81m (25.6 ft) WNW of a fire hydrant, 0.86m (2.8 ft) SW of the SW fence corner. 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: 9063063 PUBLICATION DATE: 08/11/2017 Name: CLEVELAND, LAKE ERIE OH NOAA Chart: 14839 Latitude: 41° 32.5' N ( 41.54086) USGS Quad: Longitude: 81° 38.1' W ( -81.63547) 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: 9063063 PUBLICATION DATE: 08/11/2017 Name: CLEVELAND, LAKE ERIE OH NOAA Chart: 14839 Latitude: 41° 32.5' N ( 41.54086) USGS Quad: Longitude: 81° 38.1' W ( -81.63547) 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/.