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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.
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USGS Water-Year Summary 2024
05420680 Wapsipinicon River near Tripoli, IA
LOCATION - Lat 42°50'09.93", long 92°15'26.64" referenced to North American Datum of 1983, in NW 1/4 SW 1/4 SW 1/4 sec.27, T.93 N., R.12 W., Bremer County, IA, Hydrologic Unit 07080102, on right bank 10 ft downstream from bridge on State Highway 93, 2.0 mi north of Tripoli, 1.0 mi upstream from mouth of East Fork Wapsipinicon River, and 208 mi upstream from mouth.
DRAINAGE AREA - 346 mi².
REVISIONS HISTORY - WDR IA-98-1: 1997(M). WDR US-2009: Datum.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Partial-record low-flow measurement site from September 1957 to July 1977; stage-only records from May to September 2000, October 2004 to September 2006; discharge records from April 1996 to September 1998, October 2000 to September 2004, October 2006 to current year.
GAGE - Water stage recorder. Datum of gage is 986.39 ft above North American Vertical Datum of 1988.
REMARKS - Accuracy of records is discussed in the annual Station Analysis archived at the USGS IA Water Science Center.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of July 1, 1969, discharge about 18,900 ft³/s, gage height 17.26 ft. Flood of July 21, 1999, discharge 19,400 ft³/s, gage height 18.50 ft.
CLIMATOLOGICAL RECORDS
PERIOD OF RECORD - Precipitation records from April 1996 to September 1998, June 2000 to September 2008.
INSTRUMENTATION - Tipping-bucket rain gage.
REMARKS - For records status prior to October 1, 2013, see remarks printed in annual water-data reports.
WATER-QUALITY RECORDS
PERIOD OF RECORD - Water years 2001-2004, 2008-2009, 2012.
