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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
01072800 COCHECO RIVER NEAR ROCHESTER, NH
LOCATION - Lat 43°16'06", long 70°58'27" referenced to North American Datum of 1927, Strafford County, NH, Hydrologic Unit 01060003, on right bank, directly behind Rochester Country Club, 0.6 mi south by southeast of Gonic, 2.5 mi south of Rochester City Hall, approximately 3.3 mi upstream confluence with Isinglass River and approximately 12.6 mi above mouth.
DRAINAGE AREA - 79.9 mi². From automated delineation using 30-meter National Elevation Dataset digital elevation model data and Watershed Boundary Dataset, accessed May 28, 2013 at http://water.usgs.gov/osw/streamstats/
REVISIONS HISTORY - WDR NH-VT-97-1, WDR-US-2013: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Discharge records: March 1995 to current year. Published as "at Rochester" prior to October 1996.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 118.77 ft above North American Vertical Datum of 1988.
COOPERATION - City of Rochester, NH.
REMARKS - WATER YEARS 2014 to 2021: Records good except those for estimated discharges, which are poor. Some regulation by small hydro plants, Sunrise and Baxter Lakes, City Dam No. 1, and the Rochester Reservoirs. Diversion during low flow from Berrys River (tributary to Isinglass River) to Rochester Reservoir (head of Howard Brook) then into the Rochester City water supply system. Unknown amount of diverted flow enters the Cocheco River Basin above the gage.
