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USGS 05428000 LAKE MENDOTA AT MADISON, WI

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION.--Lat 43°05'42", long 89°22'12", in NW 1/4 SE 1/4 sec.12, T.7 N., R.9 E., Dane County, Hydrologic Unit 07090001, in city boat house at dam at outlet, in Madison. 

DRAINAGE AREA. --233 square miles, 36.6 is non-contributing. Area of Lake Mendota, 15.2 square miles. 

PERIOD OF RECORD.--December 1902 to May 1903, January 1916 to January 1985(incomplete), February 1985 to present. 

REVISED RECORDS.--WDR WI-73-1: Drainage area. 

GAGE.--Water-stage recorder. Datum of gage is 839.96 NAVD8. Previously listed a 840.00 NGVD 1929, or 5.60 ft below City of Madison datum. Prior to Oct. 1, 1979, at datum 7.82 ft higher; prior to Nov. 15, 1971, nonrecording gage at same site and datum. 

REMARKS.-- Lake level regulated by concrete dam with two 12-foot gates and 20-foot lock at outlet. Gage-height telemeter at station.

OPERATED IN COOPERATION WITH:

Dane County Logo Dane County Dane County Water Resources Logo

Additional Info: INFOS

Boating safety tips
This station managed by the Wisconsin Water Science Center - Madison WI.

Available Parameters Available Period
  
2007-10-01  2026-06-04
2016-09-30  2026-06-04
2020-10-28  2026-06-04







 (7)
 
  -- or --

 

 
Summary of all available data for this site
Instantaneous-data availability statement

Gage height, feet, [(4)]
Most recent instantaneous value: 9.69 06-04-2026   01:00 CDT
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Lake or reservoir water surface elevation above NGVD 1929, feet, [CITY OF MADISON DATUM]
Most recent instantaneous value: 849.69 06-04-2026   01:00 CDT
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Lake or reservoir water surface elevation above NAVD 1988, feet
Most recent instantaneous value: 849.65 06-04-2026   01:00 CDT
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