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USGS Water-Year Summary 2024
02238500 OCKLAWAHA RIVER AT MOSS BLUFF, FL
LOCATION - Lat 29°04'52", long 81°52'51" referenced to North American Datum of 1983, in SW 1/4 sec.23, T.16 S., R.24 E., Marion County, FL, Hydrologic Unit 03080102, at downstream side of spillway structure of Moss Bluff Dam, 0.3 mi upstream from bridge on State Highway 464, 0.4 mi southwest of Moss Bluff, 3.9 mi northeast of Ocklawaha, and 64.3 mi upstream from mouth.
DRAINAGE AREA - 879 mi².
REVISIONS HISTORY - WDR FL-74-1: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - February 1943 to September 1943 (discharge measurements only); October 1943 to September 1955; April 1956, and March 1958 to July 1967 (discharge measurements only), August 1967 to current year.
GAGE - Water-stage recorder, gate-opening recorder, and data-collection platform. Datum of gage is at NGVD of 1929 and 0.96 ft below NAVD of 1988. Prior to Aug. 12, 1943, nonrecording gage, and Aug. 12, 1943 to Sept. 30, 1955, water-stage recorder at site 0.3 mi downstream at datum 0.12 ft lower; Nov. 1, 1963 to Aug. 10, 1967, nonrecording gage at site 0.3 mi downstream at present datum; Aug. 11, 1967 to Sept. 30, 1969, water-stage recorder at site 0.3 mi downstream at present datum. Auxiliary gage at upstream side of spillway structure.
COOPERATION - This gage is monitored in cooperation with the St. Johns River Water Management District.
REMARKS - Flow regulated by manipulation of gates in spillway. Discharge computed from relation between discharge, gate openings, and lockages. Discharge from a combination of two main gates and two minimum flow gates, which were installed in 2008. Gages were removed on Mar. 13, 2017 due to maintenance at the structure and re-installed on Nov. 1, 2017.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum peak stage of 50.71 ft, Sept. 12, 1960 at present datum, furnished by the Corp of Engineers.
