USGS Water-Year Summary 2019
02251000 SOUTH PRONG SAINT SEBASTIAN RIVER NEAR SEBASTIAN, FL
LOCATION - Lat 27°46'09", long 80°30'22" referenced to North American Datum of 1927, in SW 1/4 sec.23, T.31 S., R.38 E., Indian River County, FL, Hydrologic Unit 03080203, on upstream side of bridge on State Highway 512, 2.5 mi east of Interstate Highway 95, 4 mi southwest of Sebastian, and 8.3 mi upstream from mouth.
DRAINAGE AREA - 35 mi², approximately.
PERIOD OF RECORD - October 1954 to May 1965 (discharge measurements only), May 1968 to August 1972 (annual peak discharge), August 1993 to September 2010, October 2010 to current year (filtered).
GAGE - Water-stage recorder, acoustic velocity meter, and data-collection platform. Datum of gage is 10.00 ft below NGVD of 1929 and 11.38 ft below NAVD of 1988.
COOPERATION - This gage is monitored in cooperation with the St. Johns River Water Management District.