USGS Water-Year Summary for Site 02276877

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	Available Parameters
	00010 Temperature, water(Min.,Mean,Max.)
	00060 Discharge(Mean)
	00065 Gage height(Mean)
	00095 Specific cond at 25C(Min.,Mean,Max.)
	00480 Salinity(Max.,Min.,Mean)
	63680 Turbidity, Form Neph(Mean,Max.,Min.)

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Water year 2024: 2024-10-01 to 2025-09-30

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USGS Water-Year Summary 2024

02276877 ST. LUCIE CANAL BELOW S-308, NR PORT MAYACA (AUX), FL

LOCATION - Lat 26°59'07.92", long 80°36'56.16" referenced to North American Datum of 1983, Martin County, FL, Hydrologic Unit 03090202, 0.60 mi downstream of control structure 308. Just north of U.S. Highway 76 and 500 ft east of U.S. Highway 441 overpass. Site is on the south side (REW) seawall of St. Lucie Canal. See REMARKS.

DRAINAGE AREA - Indeterminate.

REVISIONS HISTORY - (Published under 02276870) WDR FL-00-2A, 1999; WRD FL-03-2A, 2002.

SURFACE-WATER RECORDS

PERIOD OF RECORD - April 1931 to September 1952, October 1981 to current year. Record prior to October 2006 published as St. Lucie Canal at Lake Okeechobee, FL, station number 02276870; period of record for station 02276870 stored in station 02276877 to compute period of record statistics for this segment of the canal.

GAGE - Satellite data collection platform with water-stage shaft encoder and acoustic Doppler velocity meter. Satellite data collection platform with water-stage shaft encoder and acoustic Doppler velocity meter installed May 17, 2001. Satellite data collection platform with water-stage shaft encoder and acoustic velocity meter until October 19, 2001, when it was removed. The acoustic velocity meter and acoustic Doppler velocity meter were run in tandem for the period of May 17, 2001 to October 19, 2001. This acoustic velocity meter station is located 0.5 mi downstream of S-308 and is stored under 02276877 in the files of the U.S. Geological Survey. Datum of gage is National Geodetic Vertical Datum of 1929 (U.S.Army Corps of Engineers bench mark), and 1.03 ft below North American Vertical Datum of 1988. April 1, 1931 to Sept 30, 1952, upstream (Lake Okeechobee) and downstream (St Lucie Canal) water-stage recorders. Prior to January 17, 1934, staff gage at site 0.4 mi downstream at different datum. January 17, 1934 to March 15, 1951, water-stage recorder at site 0.8 mi downstream at datum 1.56 ft lower. March 16, 1951, to September 1952, water-stage recorder at bridge on U.S. Highway 441 at present datum. January 17, 1934, to September 1952, auxiliary water-stage recorder 10.9 mi downstream. Prior to April 24, 1992, canal stage data obtained with digital water level recorder. August 1, 1986 to June 20, 1989, electromagnetic velocity meter and canal stage recorder 1,200 ft downstream of S-308. April 4, 1992 satellite data collection platform installed at S-308 for lake and canal stages. May 1994, satellite data collection platform with water-stage shaft encoder for canal stage and acoustic velocity meter with cross path installed 0.5 mi downstream of S-308. This data was not used until October 1, 1996, to determine the discharge from S-308. The discharge is computed under station number 02276877, then stored under 02276870 for publication. Prior to October 1, 1998, satellite data collection platform with water-stage shaft encoders for lake and canal stages in control house of S-308.

COOPERATION - U.S. Army Corps of Engineers.

REMARKS - Flow regulated by control structure 308 gates and lock at Lake Okeechobee. Flow frequently reverses during and after periods of heavy rainfall by pumpage into the canal from agricultural lands in the Everglades (negative figures indicate reverse flow towards Lake Okeechobee). Discharge computed from relations between discharge, head, gate openings, and slope at station 02276870 prior to October 1, 1996; records from station 02276870 copied into 02276877 to compute period of record statistics for this segment of the canal. Flow determined by relationship between the mean cross-sectional velocity and an average index line velocity (from the cross path index line velocities) measured with the acoustic velocity meter, from October 1, 1996 to August 13, 2001, acoustic Doppler velocity meter, August 14, 2001 to present. Station relocated during 2008 water year; the old station was located 0.5 mi downstream of control structure 308, directly beneath the U.S. Highway 441 overpass, just north of U.S. Highway 76 and 24 mi upstream of control structure 80.

EXTREMES FOR PERIOD OF RECORD - Maximum gage height, 18.87 ft Sept. 26, 2004; minimum, 8.36 ft May 30, 31, and June 1, 2007.

WATER-QUALITY RECORDS

PERIOD OF RECORD - SALINITY: November 2020 to current year. SPECIFIC CONDUCTANCE: November 2020 to current year. WATER TEMPERATURE: November 2020 to current year. TURBIDITY: November 2020 to current year.

INSTRUMENTATION - Multi-parameter water quality monitor.

REMARKS - Salinity computed from specific conductance data. Salinity, water temperature, and turbidity records available in files of the U.S. Geological Survey. Salinity, water temperature, and turbidity 15 minute data accessible online at http://sofia.usgs.gov/. Daily values of salinity, water temperature, and turbidity available online at http://waterdata.usgs.gov/nwis.

EXTREMES FOR PERIOD OF RECORD - SALINITY: Maximum recorded, 0.40 ppt June 20, 2022; minimum recorded, 0.15 ppt Nov. 26, 2020. SPECIFIC CONDUCTANCE: Maximum recorded, 858 uS/cm @ 25°C June 20, 2022; minimum recorded, 332 uS/cm @ 25°C Nov. 26, 2020. WATER TEMPERATURE: Maximum recorded, 33.2°C Aug. 21, 2022; minimum recorded, 13.4°C Feb. 3-4, 2021. TURBIDITY: Maximum recorded, 927 FNU May 6, 2021, minimum recorded, 2 FNU Sept. 11, 2022.