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Water-Year Summary for Site USGS 04180988

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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.
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Available Parameters
00060 Discharge(Mean)  

Water year 2024: 2024-10-01 to 2025-09-30
 
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USGS Water-Year Summary 2024
04180988 St. Marys River at Rockford, OH
LOCATION - Lat 40°41'41", long 84°38'48" referenced to North American Datum of 1927, Mercer County, OH, Hydrologic Unit 04100004, on left bank downstream from the SR 118 bridge, on north side of Rockford, 0.1 mi north of intersection with SR 33.
DRAINAGE AREA - 340 mi².
REVISIONS HISTORY - Gage height and discharge for the period Oct. 8, 2015, to Oct. 16, 2016, were revised on Feb. 8, 2017; the revisions were required to correct processing errors that caused incorrect assignment of times to some values.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 2005 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 787.39 ft (NAVD 1988).
REMARKS -

Records fair for water year 2014. Estimated records are poor. Records for Oct. 1, 2014 to Jul. 15, 2015: fair, except for estimated records, which were poor. Records for Jul. 16, 2015 to Oct. 19, 2015: fair, except for estimated records, which were poor. Records for Oct. 20, 2015 to Mar. 8, 2016: poor. Records for Mar. 9, 2016 to Nov. 15, 2016: fair, except for estimated records, which are poor. Nov. 16, 2016 to Mar. 6, 2017: discharge records poor.  Mar. 7, 2017 to May 2, 2017: discharge records fair.  May 3, 2017 to Nov. 6, 2017: records good.  Nov. 7, 2017 to Oct. 10, 2018: discharge records poor.  

Record quality ratings may not be included in the water-year summary for approved records newer than 09/30/2018. Record quality is still being rated internally.  For questions about record quality ratings, please send email to gs-w-oh_NWISWeb_Data_Inquiries@usgs.gov.