USGS Water-Year Summary for Site 50048570

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	Available Parameters
	72379 Elevation, lake/res, PRVD02(Obs.)

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

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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 in October 2022.

SURFACE-WATER RECORDS

GAGE - Water-stage recorder, satellite and radio telemetry at station. Datum of gage is above Local Mean Sea Level (LMSL- Old PR) and above Puerto Rico Vertical Datum of 2002 (PRVD02).

EXTREMES FOR PERIOD OF RECORD -

WATER TEMPERATURE: Maximum recorded, 32.4 °C Oct. 23, 2021 ; minimum recorded, 25.7 °C Jan 5, 2021.

SPECIFIC CONDUCTANCE: Maximum recorded 385 µS/cm April 27, 2021; minimum recorded 298 µS/cm on Nov. 27, 2021.

DISSOLVED OXYGEN: Maximum recorded, 8.7 mg/L on July 5, 2021; minimum recorded 0.3 mg/L on Nov. 13, 2020.

pH: Maximum recorded, 8.4 pH Units on June 17, 2021; minimum recorded, 7.4 pH Units on Oct. 30, 2021.

Turbidity: Maximum recorded, 63.5 FNU on Sept. 24, 2021; minimum recorded, -0.2 FNU on April 8, 2021.

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 to collects Temperature, Specific Conductance, pH, Dissolved oxygen, and Turbidity data.