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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
05429000 LAKE MONONA AT MADISON, WI
LOCATION - Lat 43°03'48", long 89°23'49" referenced to North American Datum of 1927, in SE 1/4 SW 1/4 sec.23, T.7 N., R.9 E., Dane County, WI, Hydrologic Unit 07090002, in Brittingham Park, in Madison.
DRAINAGE AREA - 279 mi² of which 36.6 mi² probably is noncontributing. Area of Lake Monona, 5.3 mi².
REVISIONS HISTORY - WSP 1338: Lake area. WDR WI-73-1: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - September 1915 to current year (fragmentary) in reports of the Geological Survey. For 1856 to March 1917 in reports of Wisconsin Railroad Commission, volume 19.
GAGE - Water-stage recorder. Datum of gage is 839.86 ft above NAVD of 1988. Prior to Oct. 1, 1979, datum 3.61 ft higher; prior to Nov. 15, 1971, nonrecording gage at same site at the higher datum.
REMARKS - Records are considered good, except for estimated record, which are poor. For records prior to October 1, 2013, see remarks printed in the annual water-data reports. For the 2014 Water Year, lake level regulated by concrete dam with four 12-foot stop-log sections and 12-foot lock at outlet of Lake Waubesa. Gage-height telemeter at station.
EXTREMES FOR PERIOD OF RECORD -
Maximum daily mean gage height = 8.52 ft, September 6, 2018
Minimum daily mean gage height = 3.22 ft, Jan. 20, 1965
