USGS Water-Year Summary 2021
01104715 CHARLES RIVER AT NEW CHARLES RIVER DAM AT BOSTON, MA
LOCATION - Lat 42°22'08", long 71°03'42" referenced to North American Datum of 1983, Suffolk County, MA, Hydrologic Unit 01090001, at New Charles River Dam, 0.7 mi north of Boston.
DRAINAGE AREA - 335 mi² of which 24 mi² probably is noncontributing.
PERIOD OF RECORD -
Charles River Stage: September 2002 to current year.
Boston Harbor Tide Stage: October 2002 to September 2006, May 2008 to current year.
GAGE - Water-stage recorder with telephone telemeter. Datum of gage is Boston City Base. Subtract 105.62 ft to adjust gage height to elevation of National Geodetic Vertical Datum of 1929.
COOPERATION - Massachusetts Department of Conservation and Recreation, Division of Planning and Engineering.
EXTREMES FOR PERIOD OF RECORD -
Maximum gage height, 108.96 ft, Mar. 15, 2010, minimum gage height, 105.11 ft, July 6, 2005.
Maximum gage height, 115.04 ft, Jan. 3, 2014. Minimum gage height, 98.21 ft, Dec. 3, 2002.