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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
012112296 GREENWICH HARBOR AT GRASS ISLAND AT GREENWICH, CT
LOCATION - Lat 41°00'50.84", long 73°37'30.29" referenced to North American Datum of 1983, Fairfield County, CT, Hydrologic Unit 01100006, on a retaining wall on the southwest side of Greenwich Harbor next to a set of public docks and just northeast of Grass Island Road next to the dock house.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Tidal Elevation: Jan. 15, 2015 to current year.
GAGE - Water-stage recorder. Datum of gage is North American Vertical Datum of 1988. Satellite telemetry at station.
COOPERATION - Town of Greenwich, CT.
EXTREMES FOR PERIOD OF RECORD - Maximum tidal elevation, 7.18 ft., Apr. 01, 2017; minimum tidal elevation, -5.74 ft., Dec. 16, 2016.
CLIMATOLOGICAL RECORDS
PERIOD OF RECORD - Precipitation: Sep. 23, 2015 to current year.
INSTRUMENTATION - Unshielded, unheated standard 8-in. diameter tipping bucket precipitation gage with 0.01 in. tip increment, top of collector approximately 12 ft. above the ground. Satellite telemetry at gage.
