U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 10 Station ID: 9063012 PUBLICATION DATE: 08/11/2017 Name: NIAGARA INTAKE, NIAGARA FALLS, NIAGARA R NY NOAA Chart: 14822 Latitude: 43° 4.6' N ( 43.07692) USGS Quad: Longitude: 79° 0.8' W ( -79.01389) TO REACH THE NOS GAUGING STATION, IN NIAGARA COUNTY, NEW YORK, FROM THE INTERSECTION OF I-190 (GRAND ISLAND BRIDGE) AND ROBERT MOSES PARKWAY, PROCEED WEST ON ROBERT MOSES PARKWAY FOR APPROX 2.25 KM (1.40 MI) , THE ETG IS IN THE NIAGARA FRONTIER PARK, JUST SOUTH SOUTHEAST OF THE EASTERLY ONE OF TWO NEW YORK POWER AUTHORITY (NYPA) INTAKE STRUCTURES ON THE SOUTH SIDE OF ROBERT MOSES PARKWAY, THE GAUGE HOUSE IS A 10' X 1O' BUILDING WITH STAINLESS STEEL SIDING. G R E A T L A K E S B E N C H M A R K S PRIMARY BENCH MARK STAMPING: INTAKE 1963 DESIGNATION: 906 3012 INTAKE MONUMENTATION: Survey disk VM#: 12774 AGENCY: Army Corp of Engineers IDB PID#: OG0215 SETTING CLASSIFICATION: Intake foundation OPUS PID: LATITUDE: 43° 4.7' N ( 43.07756) LONGITUDE: 79° 1.0' W ( -79.01694) The bench mark is a disk on the S side of Robert Moses Parkway, near river face of W intake structure of the New York State Power Authority, 14.4 m (47.2 ft) SW of SE corner, 3.4 m (11.2 ft) ENE of SW corner of the intake structure, 0.9 m (3.0 ft) S of the S face of concrete base of intake structure, being the highest point over cross at center of bronze disc set into concrete walk which is part of the intake structure that is sitting on bedrock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 10 Station ID: 9063012 PUBLICATION DATE: 08/11/2017 Name: NIAGARA INTAKE, NIAGARA FALLS, NIAGARA R NY NOAA Chart: 14822 Latitude: 43° 4.6' N ( 43.07692) USGS Quad: Longitude: 79° 0.8' W ( -79.01389) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: BM DESIGNATION: 906 3012 EWI MONUMENTATION: Bolt VM#: 12773 AGENCY: IDB PID#: OG0354 SETTING CLASSIFICATION: Intake Structure OPUS PID: LATITUDE: 43° 4.6' N ( 43.07717) LONGITUDE: 79° 0.9' W ( -79.01433) The bench mark is a bolt on the S side of Robert Moses Parkway, near the SW corner of the W face of E one of two New York Power Authority water intake structures, 8.41 m (27.59 ft) S of NW corner of water intake structure, 5.6 m (18.4 ft) N of SW corner, 1.8 m (5.9 ft) S of the S edge of the doorway entrance, 1.5 m (4.9 ft) above the sidewalk, being horizontal line at center of a 0.5 x 0.75 inch rectangular-headed brass bolt with rounded corners.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 10 Station ID: 9063012 PUBLICATION DATE: 08/11/2017 Name: NIAGARA INTAKE, NIAGARA FALLS, NIAGARA R NY NOAA Chart: 14822 Latitude: 43° 4.6' N ( 43.07692) USGS Quad: Longitude: 79° 0.8' W ( -79.01389) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: Z 411 1977 DESIGNATION: Z 411 MONUMENTATION: Bench Mark disk VM#: 12775 AGENCY: National Geodetic Survey IDB PID#: OG0353 SETTING CLASSIFICATION: Copper-clad steel rod w/o sleeve OPUS PID: LATITUDE: 43° 4.7' N ( 43.07853) LONGITUDE: 79° 1.1' W ( -79.01756) The bench mark is a disk on the median of Robert Moses Parkway, between the N and S bound lanes, 74.4 m (244.1 ft) N of the most N of two intake towers, 31.2 m (102.4 ft) E of the E side of a turn-around of the highway, 16.67 m (54.69 ft) S of the centerline of the N bound lane of Robert Moses Parkway, 14.2 m (46.6 ft) N of the centerline of the S bound lane, being a disc crimped atop a 5/8 inch copper coated steel rod driven to a depth of 6.1 m (20.0 ft) , encased in a 5-inch pvc pipe with an ngs logo cap and concrete kickblock with witness post. BENCH MARK STAMPING: DESIGNATION: 906 3012 RAIL MONUMENTATION: Survey disk VM#: 12777 AGENCY: Army Corp of Engineers IDB PID#: OG0217 SETTING CLASSIFICATION: Concrete Sidewalk OPUS PID#: OG0217 LATITUDE: 43° 4.6' N ( 43.07664) LONGITUDE: 79° 0.8' W ( -79.01250) The bench mark is a disk on the the S side of Robert Moses Parkway, 137.2 m (450.1 ft) E of E of two intake structures, 72.9 m (239.2 ft) W along seawall from an angle in the wall, 9.55 m (31.33 ft) WSW of the W edge of a asphalt bike path, 7.96 m (26.12 ft) SW of the SW corner of square concrete storm drain, 1.8 m (5.9 ft) N of river face of concrete breakwall, 18.3 cm (7.2 in) S of N edge of concrete walk, being highest point over cross at center of bronze disc set into the concrete walk.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 10 Station ID: 9063012 PUBLICATION DATE: 08/11/2017 Name: NIAGARA INTAKE, NIAGARA FALLS, NIAGARA R NY NOAA Chart: 14822 Latitude: 43° 4.6' N ( 43.07692) USGS Quad: Longitude: 79° 0.8' W ( -79.01389) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: AJAX DESIGNATION: 906 3012 AJAX MONUMENTATION: Survey disk VM#: 12780 AGENCY: US Lake Survey IDB PID#: OG0194 SETTING CLASSIFICATION: Tower Foundation OPUS PID: LATITUDE: 43° 4.8' N ( 43.07989) LONGITUDE: 79° 0.9' W ( -79.01428) The bench mark is a disk 135.9 m (445.9 ft) S of S curb of Buffalo Avenue, on concrete foundation which used to support the SE leg of a large double-bent transmission tower no. 25, on E-W centerline of the footing, 29.9 m (98.1 ft) S of the SE leg of tower T291, 13.9 m (45.6 ft) SSW of a fire hydrant, 11.4 m (37.4 ft) NNE of most N train rail, 8.05 m (26.41 ft) SW of power pole marked Bell Atlantic no.5, 7.03 m (23.06 ft) NW of centerline of Iroquois Ave curb, flush with the ground surface, being highest point over cross at center of bronze disc set into the concrete, near the SE edge of the concrete.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 10 Station ID: 9063012 PUBLICATION DATE: 08/11/2017 Name: NIAGARA INTAKE, NIAGARA FALLS, NIAGARA R NY NOAA Chart: 14822 Latitude: 43° 4.6' N ( 43.07692) USGS Quad: Longitude: 79° 0.8' W ( -79.01389) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: A 412 1977 DESIGNATION: A 412 MONUMENTATION: Bench Mark disk VM#: 12781 AGENCY: National Geodetic Survey IDB PID#: OG0355 SETTING CLASSIFICATION: Seawall OPUS PID: LATITUDE: 43° 4.6' N ( 43.07689) LONGITUDE: 79° 0.8' W ( -79.01411) The bench mark is a disk on the S side of Robert Moses Parkway, 38.2 m (125.3 ft) SE of the SW corner of the S tower, 5.45 m (17.88 ft) SSW of the NW corner of gauge house, 3.59 m (11.78 ft) SW of the SW corner of gauge house, 0.25 m (0.82 ft) N of guard rail which runs E-W of Niagara River.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 10 Station ID: 9063012 PUBLICATION DATE: 08/11/2017 Name: NIAGARA INTAKE, NIAGARA FALLS, NIAGARA R NY NOAA Chart: 14822 Latitude: 43° 4.6' N ( 43.07692) USGS Quad: Longitude: 79° 0.8' W ( -79.01389) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: Y 411 1977 DESIGNATION: Y 411 MONUMENTATION: Bench Mark disk VM#: 12782 AGENCY: National Geodetic Survey IDB PID#: OG0352 SETTING CLASSIFICATION: Abutment OPUS PID: LATITUDE: 43° 4.7' N ( 43.07853) LONGITUDE: 79° 1.6' W ( -79.02600) The bench mark is a disk on the S of Robert Moses Parkway, in the SW bridge abutment, 20.1 m (65.9 ft) W of the E end of concrete bridge abutment, 15.4 m (50.52 ft) N of the S end of the abutment wing wall, 0.29 m (0.95 ft) S of the N edge of concrete abutment.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 10 Station ID: 9063012 PUBLICATION DATE: 08/11/2017 Name: NIAGARA INTAKE, NIAGARA FALLS, NIAGARA R NY NOAA Chart: 14822 Latitude: 43° 4.6' N ( 43.07692) USGS Quad: Longitude: 79° 0.8' W ( -79.01389) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: X 411 1977 DESIGNATION: X 411 MONUMENTATION: Tidal Station disk VM#: 13025 AGENCY: IDB PID#: OG0351 SETTING CLASSIFICATION: OPUS PID: LATITUDE: ' °deg (0) LONGITUDE: ' °deg (0)
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 8 of 10 Station ID: 9063012 PUBLICATION DATE: 08/11/2017 Name: NIAGARA INTAKE, NIAGARA FALLS, NIAGARA R NY NOAA Chart: 14822 Latitude: 43° 4.6' N ( 43.07692) USGS Quad: Longitude: 79° 0.8' W ( -79.01389) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: V411 1977 DESIGNATION: V 411 MONUMENTATION: Bench Mark disk VM#: 17006 AGENCY: IDB PID#: OG0347 SETTING CLASSIFICATION: OPUS PID: LATITUDE: 43° 4.9' N ( 43.08167) LONGITUDE: 79° 3.7' W ( -79.06167) BENCH MARK STAMPING: 906 3012 J 2013 DESIGNATION: 906 3012 J MONUMENTATION: Metal Rod VM#: 20867 AGENCY: National Ocean Service IDB PID#: SETTING CLASSIFICATION: Metal rod driven into the ground OPUS PID: LATITUDE: 43° 4.6' N ( 43.07656) LONGITUDE: 79° 0.7' W ( -79.01100) The bench mark is a metal rod 47.4 m (155.5 ft) ESE of a 25 cm diameter tree in the E side of an open field S of the Robert Moses Parkway, 26.2 m (86.0 ft) SSE of the center line of the S-bound lane of the Robert Moses Parkway, 14.7 m (48.2 ft) NE of the center line of an asphalt jogging path, 15 cm W of a NOS witness post. 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 9 of 10 Station ID: 9063012 PUBLICATION DATE: 08/11/2017 Name: NIAGARA INTAKE, NIAGARA FALLS, NIAGARA R NY NOAA Chart: 14822 Latitude: 43° 4.6' N ( 43.07692) USGS Quad: Longitude: 79° 0.8' W ( -79.01389) 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 10 of 10 Station ID: 9063012 PUBLICATION DATE: 08/11/2017 Name: NIAGARA INTAKE, NIAGARA FALLS, NIAGARA R NY NOAA Chart: 14822 Latitude: 43° 4.6' N ( 43.07692) USGS Quad: Longitude: 79° 0.8' W ( -79.01389) 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/.