USGS Water-Year Summary 2019
02238180 HOLLY LAKE NEAR UMATILLA, FL
LOCATION - Lat 28°56'11", long 81°43'04" referenced to North American Datum of 1927, in SW 1/4 sec.09, T.18 S., R.26 E., Lake County, FL, Hydrologic Unit 03080102, on south shore of lake, at county boat ramp on County Road 450, and 3.1 mi west of Umatilla.
DRAINAGE AREA - 0.78 mi².
PERIOD OF RECORD - October 1967 to October 1968 (thrice weekly); November 1968 to February 1970 (weekly); August 1982 to March 1983 (fragmentary); April 1983 to September 2015 (weekly); October 2015 to current year (bimonthly).
GAGE - Nonrecording gage. Datum of gage is at NGVD of 1929.
COOPERATION - This gage is monitored in cooperation with the Lake County Water Authority.
EXTREMES FOR PERIOD OF RECORD - Maximum elevation observed, 61.43 ft, July 31, 1984; minimum observed, 50.60 ft, Jan. 27, 2014.