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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
05486000 North River near Norwalk, IA
LOCATION - Lat 41°27'29.2", long 93°39'17.9" referenced to North American Datum of 1983, in SW 1/4 NW 1/4 SW 1/4 sec.20, T.77 N., R.24 W., Warren County, IA, Hydrologic Unit 07100008, on left bank 10 ft downstream from bridge on County Highway R57, 1.7 mi southeast of Norwalk, 5.2 mi upstream from Middle Creek, 6.2 mi downstream from Badger Creek, and 22.8 mi upstream from mouth.
DRAINAGE AREA - 349 mi².
REVISIONS HISTORY -
WSP 1438: Drainage area. WSP 1508: 1946. WDR IA-76-1: 1975(P).
Revisions: Gage datum was updated to 788.07 ft NAVD88 on January 1, 2023, as determined by a GNSS Level II survey. Gage datum was previously published as 788.45 ft NGVD29 from levels.
WSP 1438: Drainage area. WSP 1508: 1946. WDR IA-76-1: 1975(P).
Revisions: Gage datum was updated to 788.07 ft NAVD88 on January 1, 2023, as determined by a GNSS Level II survey. Gage datum was previously published as 788.45 ft NGVD29 from levels.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Discharge records from February 1940 to current year.
GAGE - Water-stage recorder. Datum of gage is 788.07 ft above North American Vertical Datum of 1988. Prior to June 12, 1946, non-recording gage at same site and datum; January 7 to October 11, 1960, non-recording gage at site 2.1 mi upstream at different datum.
REMARKS - Accuracy of records is discussed in the annual Station Analysis archived at the USGS IA Water Science Center.
