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Water-Year Summary for Site 01094500

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Available Parameters
00060 Discharge(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
01094500 NORTH NASHUA RIVER NEAR LEOMINSTER, MA
LOCATION - Lat 42°29'42.23", long 71°43'18.96" referenced to North American Datum of 1983, Worcester County, MA, Hydrologic Unit 01070004, on right bank, 100 ft downstream from I-190 in Leominster.
DRAINAGE AREA - 110 mi².
REVISIONS HISTORY - WDR MA-NH-RI-VT-73-1: Drainage area. WDR MA-RI-82-1: 1981. WDR MA-RI-92-1: 1978(M).
SURFACE-WATER RECORDS
PERIOD OF RECORD - Discharge: September 1935 to current year. Water-quality records: water years 1955, 1958.
GAGE - Water-stage recorder with satellite telemeter. Datum of gage is about 260 ft above National Geodetic Vertical Datum (NGVD) of 1929. Prior to Dec. 15, 2006, datum of gage was 270.04 ft above NGVD of 1929 at site 1,500 ft upstream.
COOPERATION - Massachusetts Department of Conservation and Recreation, Office of Water Resources.
REMARKS - Records good except those for estimated daily discharges, which are poor. Regulation at low flow by mills and waste-water treatment plant upstream. Flow includes diversions to basin for municipal supplies: for Fitchburg, from Mare Meadow Reservoir since 1955; for Leominster, from Wachusett Reservoir since 1966 and from the Southeast Well Field since 1958. Total drainage area above gage is 110 mi²; net drainage area above gage is 108 mi², excludes 2.1 mi² above outlet of Ashby (Fitchburg) Reservoir.

Note: historical maximum peak flow of 16,300 cfs on Mar. 18, 1936 by computation of peak flow over dam. Historical maximum peak stage of 20.53 ft on Mar. 18, 1936 from floodmarks at datum then in use.