Warning: Javascript must be enabled to use all the features on this page!

Page Loading - Please Wait...

Click to hideNews Bulletins
Click to hide state-specific text


The formation of ice on rivers can cause discharge values to appear unusually high. Display of these erroneous discharge data may result in improper assessment of flow conditions and misuse of the data. For this reason, display of discharge values for streams significantly affected by ice may be disabled from view. Display of discharge data will resume when ice conditions are no longer present. Discharge values for streams minimally affected by ice will continue to be displayed. Flows for streams with these conditions appear to increase during the night and decrease to near-base-line conditions around midday. To estimate the correct discharge for these streams, use the flow rate that corresponds to the bottom of the discharge curve, rather than the peak that corresponds to the top of the curve. Note that this method of estimation is possible only when no surface runoff is occurring. Daily mean discharges for periods of both significant and minimal ice-effect will be estimated and published in the Annual Water-Data Report for the water year in which they occurred.

! We're replacing this page with a Next Generation Monitoring Location Page.
We're modernizing Water Data for the Nation delivery. Find out what this means for you. This page will be discontinued Jan.1, 2023.



Click to hidestation-specific text

LOCATION--Lat 41°39’45", long 70°50’20", Plymouth County, Hydrologic Unit 01090002, on left bank, 200 ft west of Riverside Drive, 0.4 mi upstream from Rt. 6 bridge near Mattapoisett.
DRAINAGE AREA--24.0 mi2.
PERIOD OF RECORD--September 2006 to Oct. 7, 2010, Apr. 9, 2015 to present.
GAGE--Data Collection Platform with satellite telemeter. Datum of gage is 9.17 ft above NAVD 1988, estimated from topographic map. Datum previously reported as 10 ft above NGVD 1929, estimated from topographic map.
REMARKS--Flow affected by upstream withdrawals for municipal water supplies and cranberry bog operations.
COOPERATION BY--Massachusetts Department of Conservation and Recreation, Office of Water Resources.

Photo of Mattapoisett River gaging station

Boating safety tips
Available Parameters Available Period
2006-10-01  2021-12-09
2008-05-05  2021-12-09


  -- or --



Summary of all available data for this site
Instantaneous-data availability statement

Discharge, cubic feet per second

Most recent instantaneous value: 26.8 12-09-2021   07:30 EST
Graph of  Discharge, cubic feet per second

Add up to 2 more sites and replot for "Discharge, cubic feet per second"


Create presentation-quality / stand-alone graph.   Subscribe to WaterAlert      

See this graph on the Monitoring Location Pages

Gage height, feet

Most recent instantaneous value: 4.17 12-09-2021   07:30 EST
Graph of  Gage height, feet

Add up to 2 more sites and replot for "Gage height, feet"


Create presentation-quality / stand-alone graph.   Subscribe to WaterAlert      

See this graph on the Monitoring Location Pages