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USGS Water-Year Summary 2024
50048570 LAS CASAS LAKE AT FORT BUCHANAN, GUAYNABO, PR
LOCATION - Lat 18°24'59.74", long 66°07'26.20" referenced to North American Datum of 1927, Guaynabo Municipio, PR, Hydrologic Unit 21010005,
REVISIONS HISTORY - Datum of gage was previously reported as 34 ft (10.4 m) above NGVD29, but NGVD29 datum does not exist in Puerto Rico. Published historical records did not reflect this site file typo. Revised to PRVD02 Datum of 14.0 ft. (4.3 m) in October 2022.
SURFACE-WATER RECORDS
GAGE - Water-stage recorder, satellite and radio telemetry at station. Datum of gage is 14.0 ft. (4.3 m) above Puerto Rico Vertical Datum of 2002 (PRVD02) and at Local Mean Sea Level (LMSL- Old PR).
EXTREMES FOR PERIOD OF RECORD - Water Temperature: Maximum recorded, 33.0 °C June 9, 2023; minimum recorded, 24.1 °C Feb. 6, 2022.
Specific Conductance: Maximum recorded 395 µS/cm April 6, 2023; minimum recorded 187 µS/cm on May 3, 2022.
Dissolved Oxygen: Maximum recorded, 11.39 mg/L on November 24, 2024, 2022; minimum recorded 0.1 mg/L on Oct. 21, 2023.
pH: Maximum recorded, 9.14 pH Units on 2024-08-29; minimum recorded, 6.9 pH Units on Oct. 27, 2023.
Turbidity: Maximum recorded, 74.7 FNU on Aug. 4, 2022; minimum recorded, 0.6 FNU on May 07, 2023.
Specific Conductance: Maximum recorded 395 µS/cm April 6, 2023; minimum recorded 187 µS/cm on May 3, 2022.
Dissolved Oxygen: Maximum recorded, 11.39 mg/L on November 24, 2024, 2022; minimum recorded 0.1 mg/L on Oct. 21, 2023.
pH: Maximum recorded, 9.14 pH Units on 2024-08-29; minimum recorded, 6.9 pH Units on Oct. 27, 2023.
Turbidity: Maximum recorded, 74.7 FNU on Aug. 4, 2022; minimum recorded, 0.6 FNU on May 07, 2023.
WATER-QUALITY RECORDS
COOPERATION - United States Army Reserve (USAR)
INSTRUMENTATION -
Data Collection Platform with a Satlink 3, multi-communications logger-transmitter and EXO2 multiparameter sonde 19M101362. The Gage house approximated dimensions are a metal shelter of 2' x 3' x 3’ with a PVC 6 inch and +/- 25 ft from gage to the lake. The Gage height is recorded by a submersible pressure transducer. Continuous water quality monitor is installed at an elevation of +/- 3.5 ft and collect data for temperature, specific conductance, pH, dissolved oxygen, and turbidity.
