PROVISIONAL DATA SUBJECT TO REVISION
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This gage is monitored in cooperation with
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| Data are tidally affected -- Astronomical tides cause significant cycles of approximately 24.84 hours at this site. Because a different portion of the 24.84-hour tidal cycle is averaged in successive daily (24-hour) computations, a systematic secondary oscillation, unrelated to basin hydrology and having a period of about two weeks may be apparent in daily data. |
LOCATION.--Lat 27°31'14", long 82°24'07" (1927 North American datum), in NE1/4 sec.16, T.34 S., R.19 E., Manatee County, Hydrologic Unit 03100202, on left bank, on wooden "A" frame structure on Upper Manatee River Road, 3.0 mi upstream from Ft. Hamer, and 6.0 mi downstream from the dam. DRAINAGE AREA.--139 mi2. PERIOD OF RECORD.--March 1997 to March 1998 (maximum and minimum only); January 2001 to September 2003 (maximum and minimum only); October 2003 to September 2010 (tidal high-high and low-low only); October 2010 to September 2013 (maximum and minimum only), discontinued. GAGE.--Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929. Prior to Jan. 26, 2001, at datum 18.40 ft higher.
Instantaneous-data availability statement
