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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
05514840 DARDENNE CREEK AT O'FALLON, MO
LOCATION - Lat 38°44'25.3", long 90°41'42.2" referenced to North American Datum of 1983, in NE 1/4 NE 1/4 SE 1/4 sec.16, T.46 N., R.3 E., St. Charles County, MO, Hydrologic Unit 07110009, attached to downstream side of State Highway K bridge, 4.2 mi south of Interstate 70.
DRAINAGE AREA - 61 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - Nov 18, 1999 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 461.98 ft above North American Vertical Datum of 1988.
REMARKS - Accuracy of records is discussed in the annual Station Analysis archived at the USGS MO Water Science Center.
