LOCATION.--Lat 43°04'18.4", long 77°17'49.1" referenced to North American Datum of 1983, Wayne County, NY, Hydrologic Unit 04140201, on left bank in Macedon, 500 ft downstream from headgate in old Erie Canal, 700 ft downstream from bridge on State Highway 350, 0.2 mi downstream from Lock 30, and 2.6 mi upstream from Ganargua Creek.
DRAINAGE AREA.--See REMARKS.
PERIOD OF RECORD.--November 1919 to December 1920, October 1950 to September 1977, October 1977 to September 2018 (navigation seasons only), October 2018 to current year. Records since October 2018 equivalent to earlier records if diversions to Erie (Barge) Canal at Lock 30 (station 04218999) is added to flow past station. Prior to October 1956, published as "Barge Canal at Lock 30, Macedon."
REVISIONS HISTORY.--WSP 1237: 1951
GAGE.--Water-stage recorder. Datum of gage is 447.58 ft above NGVD of 1929 and 447.00 ft above NAVD of 1988. Nov. 1, 1919 to Dec. 28, 1920, nonrecording gage at same site at different datum.
COOPERATION.--Records of gate openings and diversions to Erie (Barge) Canal at Lock 30 (station 04218999) provided by New York State Canal Corporation.
REMARKS.--This record represents net diversion from Niagara and Genesee River basins into Oswego River basin through Erie (Barge) Canal. Prior to October 2018, discharge during the non-navigation period, included leakage through guard gates, runoff from small areas tributary to canal upstream from station, or diversion for use downstream in the Canal system. Since October 2018, flow at this station does not include flow diverted at the Erie (Barge) Canal through Lock 30 (station 04218999). Total flow of Erie (Barge) Canal at Macedon includes flow through bypass channel at Lock 30 (station 04219000) plus diversions to Erie (Barge) Canal at Lock 30 (station 04218999). Prior to October 2018, records published as total flow.
Water Year 2015: Records poor. Water Years 2014, 2016-17: Records fair. Water Years 2018-19: Records fair except those for estimated daily discharges, which are poor. Water Years 2020-23: Records fair except those for estimated daily discharges and discharges below 2 ft³/s, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Combined flow maximum daily discharge, 874 ft³/s, Dec. 3, 1969, combined flow maximum instantaneous discharge not determined; combined flow minimum discharge not determined. Bypass channel only, since October 2018, maximum discharge, 369 ft³/s, July 7, 2019, gage height, 2.69 ft; minimum discharge not determined.

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