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Water-Year Summary for Site 05501000

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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.
Available Parameters
00060 Discharge(Mean)  
00065 Gage height(Obs.)  

Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023
LOCATION - Lat 39°49'01.2", long 91°32'45.7" referenced to North American Datum of 1983, in SW 1/4 SW 1/4 SW 1/4 sec.14, T.58 N., R.6 W., Marion County, MO, Hydrologic Unit 07110004, on the left downstream abutment of County Road 329 bridge, 1.5 mi north of Palmyra, and 8.6 mi upstream from mouth.
DRAINAGE AREA - 354 mi².
PERIOD OF RECORD - Dec 1934 to current year. Low-flow records not equivalent prior to Oct 1, 2007, because of undetermined channel-flow loss between sites.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 473.73 ft. above North American Vertical Datum of 1988. Prior to Oct 1, 1945, nonrecording gage at bridge 2 mi downstream; Oct 1, 1945, to Jun 22, 1951, nonrecording gage at site 1.8 mi downstream; Jun 23, 1951 to Oct 1, 2007 recording gage at site 1.8 mi downstream. Datum of these gages 464.81 ft above National Geodetic Vertical Datum of 1929 (levels by U.S. Army Corps of Engineers).
REMARKS - Accuracy of records is discussed in the annual Station Analysis archived at the USGS MO Water Science Center.  
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage prior to 1934, about 28.0 ft, from floodmarks, date unknown, at site 2 mi downstream, former datum.