USGS Water-Year Summary 2022
01096508 MERRIMACK RIVER AT NASHUA, NH
LOCATION - Lat 42°45'48", long 71°26'36" referenced to North American Datum of 1927, Hillsborough County, NH, Hydrologic Unit 01070002, at Nashua, at downstream side of State Highway 111 and 0.25 mi downstream from the Nashua River.
DRAINAGE AREA - 3,480 mi².
PERIOD OF RECORD - Elevation: December 2021 to current year.
GAGE - Water-stage recorder. Datum of gage is North American Vertical Datum of 1988.
COOPERATION - Gage operated in cooperation with the City of Nashua, NH.