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LOCATION--Lat 42°42’17.4", long
71°09’11.3", Essex County, Hydrologic Unit 01070002, on left
bank, 50 ft downstream from Union Street (Duck Bridge) at Lawrence,
DRAINAGE AREA--Total above gage, 4,672 mi2 of which 214 mi2 is probably non-contributing.
PERIOD OF RECORD-- August 2012 to current year.
GAGE--Water-stage recorder with satellite telemeter. Elevation of gage is set to North Americian Vertical Datum (NAVD88), from levels survey.
COOPERATION BY--Massachusetts Department of Conservation and Recreation, Office or Water Resources.
REMARKS--Stage-only data are available.
KEY FLOOD ELEVATIONS--Top of concrete retaining wall below Duck Bridge, 16.74 ft, NAVD88.