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USGS Water-Year Summary 2024
02304500 HILLSBOROUGH RIVER NEAR TAMPA, FL.
LOCATION - Lat 28°01'25", long 82°25'40" referenced to North American Datum of 1927, in NW 1/4 sec.29, T.28 S., R.19 E., Hillsborough County, FL, Hydrologic Unit 03100205, on left bank at upstream side of control structure for Tampa Reservoir, at 30th Street, 5.4 mi northeast of Tampa, and 10 mi upstream from mouth.
DRAINAGE AREA - 624 mi².
REVISIONS HISTORY - WSP 1234: Drainage area. WDR-US-2006:Drainage area. WDR-US-2006, daily and monthly totals.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1938 to current year.
GAGE - Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929. Prior to Oct. 1, 1945, at site 2.1 mi upstream at datum 0.66 ft higher.
COOPERATION - This gage is monitored in cooperation with the City of Tampa.
REMARKS - Flow regulated at station since Oct. 1, 1945, by manipulation of radial gates in spillways and dam by city of Tampa Water Department. Some augmentation at times by pumping from Sulphur Springs at Sulphur Springs into reservoir. Diversion from reservoir 1.3 mi upstream from station by city of Tampa for water supply. Diversion at times since May 1979 from basin into Tampa Bypass Canal during high flow. Period of record gage height at present datum.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage known, 25.6 ft, Sept. 7, 1933, at former site and datum, from floodmarks, affected by backwater prior to failure of Tampa power dam, 2.1 mi below former gage. A discharge of 16,500 ft³/s, was measured Sept. 9, 1933.
CLIMATOLOGICAL RECORDS
PERIOD OF RECORD - October 2001 to current year.
INSTRUMENTATION - A 8-inch diameter, tipping bucket precipitation gage 15--minute-interval, mounted on top of the concrete gage house on left edge of the dam with the top of funnel 11 ft above the ground.
REMARKS - Collection, computation and publication of precipitation data do not necessarily conform to standards used by the National Weather Service. Records of precipitation prior to October 1, 2001, not published but are available in files of the Geological Survey.
