U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 7 Station ID: 9052030 PUBLICATION DATE: 08/11/2017 Name: OSWEGO, LAKE ONTARIO NY NOAA Chart: 14813 Latitude: 43° 27.9' N ( 43.46417) USGS Quad: OSWEGO WEST Longitude: 76° 30.7' W ( -76.51183) TO REACH THE NOS GAUGE, IN OSWEGO, OSWEGO COUNTY, NY, FROM THE INTERSECTION OF WEST BRIDGE ST (HWY 104) AND 2ND ST, PROCEED NORTH ON EAST 2ND ST FOR 0.45 MILE (0.72 KM) TO THE OSWEGO PORT AUTHORITY PROPERTY ENTRANCE, GAUGE IS LOCATED INSIDE A 6 X 8 FT, ROOM IN THE LOWER SOUTHWEST CORNER OF THE PORT AUTHORITY OF OSWEGO WAREHOUSE AND ON THE EAST SIDE OF THE OSWEGO RIVER. G R E A T L A K E S B E N C H M A R K S PRIMARY BENCH MARK STAMPING: LAKE 1948 DESIGNATION: 905 2030 LAKE MONUMENTATION: Metal Rod VM#: 1268 AGENCY: USLS IDB PID#: OF0658 SETTING CLASSIFICATION: Metal rod driven into the ground OPUS PID: LATITUDE: 43° 28.0' N ( 43.46706) LONGITUDE: 76° 30.5' W ( -76.50900) BM Lake is about 83.8 m (275 ft) NE of ruins of former Coast Guard boathouse, between railroad track and stone retaining wall along toe of the hill, about 57.0 m (187 ft) NE of gate in a fence. Bench mark is 10.9 m (35.7 ft) from stone revetment along the lake shore, 1.2 m (3.8 ft) from most SE rail of the track, 0.3 m (1.0 ft) from face of the stone retaining wall, on line of arrow cut into second course of stone from top of the retaining wall, flush with the ground surface, being highest point on top of a 1-inch diameter iron rod, 1.5 m (5.0 ft) long. BM has 5 inch sleeve with aluminum cover and concrete kick block and 0.2m (0.7 ft) below grade.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 7 Station ID: 9052030 PUBLICATION DATE: 08/11/2017 Name: OSWEGO, LAKE ONTARIO NY NOAA Chart: 14813 Latitude: 43° 27.9' N ( 43.46417) USGS Quad: OSWEGO WEST Longitude: 76° 30.7' W ( -76.51183) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: DESIGNATION: 905 2030 OSWEGO MONUMENTATION: Bolt VM#: 1272 AGENCY: IDB PID#: OF0657 SETTING CLASSIFICATION: Concrete OPUS PID: LATITUDE: 43° 27.9' N ( 43.46561) LONGITUDE: 76° 30.7' W ( -76.51119) BM Oswego is near NE corner of main warehouse building occupied by Port of Oswego Authority, on the loading dock which is attached to E face of building, 4.7 m (15.5 ft) S of the N edge of the loading dock, 15.2 cm (0.5 ft) from the NE building corner, loading dock is about 1.2 m (4.0 ft) above the ground, being highest point over a 1/2-inch diameter steel carriage bolt set into the concrete. BENCH MARK STAMPING: DESIGNATION: 905 2030 WILL MONUMENTATION: Bolt VM#: 1273 AGENCY: IDB PID#: OF0653 SETTING CLASSIFICATION: Concrete floor OPUS PID: LATITUDE: 43° 27.9' N ( 43.46436) LONGITUDE: 76° 30.7' W ( -76.51117) BM Will is on E side of the Oswego River near its mouth, inside of and near the S end of main warehouse building occupied by the Port of Oswego Authority, 9.1 cm (0.3 ft) from outer angle formed by NE corner of wall dividing two-story office facilities and general warehouse, being highest point on top of a 1/2-inch diameter steel carriage-bolt set into the concrete floor, mark is a bolt head, part of which has rusted off, in addition, the concrete around the mark is cracking.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 7 Station ID: 9052030 PUBLICATION DATE: 08/11/2017 Name: OSWEGO, LAKE ONTARIO NY NOAA Chart: 14813 Latitude: 43° 27.9' N ( 43.46417) USGS Quad: OSWEGO WEST Longitude: 76° 30.7' W ( -76.51183) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: DESIGNATION: 905 2030 SON MONUMENTATION: Bolt VM#: 1276 AGENCY: IDB PID#: OF0656 SETTING CLASSIFICATION: Loading dock concrete surface OPUS PID: LATITUDE: 43° 27.9' N ( 43.46436) LONGITUDE: 76° 30.6' W ( -76.51072) BM Son is 4.6 m (15.0 ft) N of the S edge of loading dock, loading dock is about 1.2 m (4.0 ft) above the ground, 24.4 cm (0.8 ft) SE from the SE building corner, being highest point on top of a 1/4-inch diameter steel bolt set into the concrete loading dock and set flush with the loading dock surface. BENCH MARK STAMPING: DESIGNATION: 905 2030 E MONUMENTATION: Survey disk VM#: 1277 AGENCY: US Army Corps of Engineers (USE) IDB PID#: OF0654 SETTING CLASSIFICATION: Concrete OPUS PID: LATITUDE: 43° 27.8' N ( 43.46417) LONGITUDE: 76° 30.7' W ( -76.51142) BM E is 14.5 m (45.7 ft) W of the SW corner of warehouse, 0.6 m (2.0 ft) E of dock face, being highest point over cross at center of bronze disc set into the concrete.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 7 Station ID: 9052030 PUBLICATION DATE: 08/11/2017 Name: OSWEGO, LAKE ONTARIO NY NOAA Chart: 14813 Latitude: 43° 27.9' N ( 43.46417) USGS Quad: OSWEGO WEST Longitude: 76° 30.7' W ( -76.51183) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: 2030 J 1997 DESIGNATION: 905 2030 J MONUMENTATION: Metal Rod VM#: 17014 AGENCY: National Ocean Service IDB PID#: AH9231 SETTING CLASSIFICATION: OPUS PID: LATITUDE: 43° 28.0' N ( 43.46664) LONGITUDE: 76° 30.6' W ( -76.51081) BM J is 85.5 m (280.6 ft) NE of the NE corner of warehouse, 42.9 m (140.7 ft) W of center of track switch, 7.5 m (24.6 ft) SE of chiseled X in the top of the end steel I-beam for guard rail, 4.01 m (13.15 ft) SW of chiseled X in S edge of S rail for the most N track, 3.8 m (12.6 ft) SE of chiseled X in same track, 2.7 m (8.7 ft) S of chiseled X in same track, 6.0 m (19.7 ft) N of chiseled X in N edge of N rail of S track, being highest point on top of a stainless steel rod, the rod is 2 cm below ground with aluminum access cover flush with ground. To protect the BM, owner of property has put a heavy steel culvert opening with lid over the mark.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 7 Station ID: 9052030 PUBLICATION DATE: 08/11/2017 Name: OSWEGO, LAKE ONTARIO NY NOAA Chart: 14813 Latitude: 43° 27.9' N ( 43.46417) USGS Quad: OSWEGO WEST Longitude: 76° 30.7' W ( -76.51183) G R E A T L A K E S B E N C H M A R K S BENCH MARK STAMPING: D DESIGNATION: D MONUMENTATION: Survey disk VM#: 18293 AGENCY: Army Corps of Engineers IDB PID#: DJ5176 SETTING CLASSIFICATION: Unspecified Concrete OPUS PID#: DJ5176 LATITUDE: 43° 27.9' N ( 43.46547) LONGITUDE: 76° 30.7' W ( -76.51211) BM D is 42.73 meters (140.19 ft) NW of the NW corner of the Ports bldg and warehouse, 9.30 meters (30.51 ft) W of the E edge of the rounded bulkhead corner, 8.26 meters (27.10 ft) N of the most N bollard, 0.88 meters (2.89 ft) E of the W edge of the rounded bulkhead cell. 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 6 of 7 Station ID: 9052030 PUBLICATION DATE: 08/11/2017 Name: OSWEGO, LAKE ONTARIO NY NOAA Chart: 14813 Latitude: 43° 27.9' N ( 43.46417) USGS Quad: OSWEGO WEST Longitude: 76° 30.7' W ( -76.51183) 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 7 of 7 Station ID: 9052030 PUBLICATION DATE: 08/11/2017 Name: OSWEGO, LAKE ONTARIO NY NOAA Chart: 14813 Latitude: 43° 27.9' N ( 43.46417) USGS Quad: OSWEGO WEST Longitude: 76° 30.7' W ( -76.51183) 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/.