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USGS Water-Year Summary 2024
02281200 HILLSBORO CANAL AT S-6, NEAR SHAWANO, FL
LOCATION - Lat 26°28'18", long 80°26'46" referenced to North American Datum of 1927, in NE 1/4 sec.04, T.46 S., R.39 E., Palm Beach County, FL, Hydrologic Unit 03090202, at pump station 6, and 7 mi southeast of Shawano.
DRAINAGE AREA - Indeterminate.
REVISIONS HISTORY - WDR FL-03-2A, 1995.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1957 to September 1968 (gage heights and discharge). October 1968 to September 1981 (discharge), October 1990 to current year.
GAGE - Satellite data collection platform with water-stage shaft encoder and acoustic Doppler velocity meter. The acoustic velocity meter and acoustic Doppler velocity meter were run in tandem for the period of August 10, 2001 to January 30, 2002. Dual water-stage recorder from 1968 to 1981 at S-6. Datum of gage is National Geodetic Vertical Datum of 1929 (U.S. Army Corps of Engineers bench mark) and 1.55 ft below North American Vertical Datum of 1988 (NAVD 88). Prior to October 1, 1959, at datum 0.44 ft lower.
COOPERATION - Records furnished by South Florida Water Management District October 1968 to September 1981. Prior to October 1968, pump records furnished by South Florida Water Management District, and records computed by U.S. Geological Survey. After reestablishment in the 1991 water year, records computed by U.S. Geological Survey.
REMARKS - Flow regulated by pumpage at S-6, by Structure 351 and pump station 2 at Lake Okeechobee and by drainage
and irrigation pumps upstream. Records include flow from Levee 6 Canal from March 15, 1966 to October 1, 1999. Historical discharge is
the summation of pumpage and siphoning at S-6. Historical negative flow indicates flow to the north due to siphoning at S-6. Acoustic
velocity meter system began operation October 1990, on both S-6 and L-6 canals. Everglades Construction Project for Storm Treatment Area 2 (STA2) had a permanent effect on L-6
canal. Flow from L-6 canal into Hillsboro canal main channel was plugged in August 1999, approximately 0.25 mi upstream of
L-6 cross-section for the diversion of flow into STA2. L-6 acoustic velocity meter was discontinued on September 30, 1999.
From October 1990 to September 1999, total discharge is computed by the sum of S-6 and L-6 discharges from relations between
stage vs area and line velocity vs mean velocity index ratings. Acoustic velocity meter removed on January 30, 2002.
Beginning October 1, 1999, discharge represents positive flow due to pumping at S-6 into WCA 1.
EXTREMES FOR PERIOD OF RECORD - Maximum gage height, 14.74 ft Dec. 25, 1958; minimum, 6.94 ft May 29, 2007.
