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Water-Year Summary for Site 50020100

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
  • For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
  • For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
  • Not all sites have reports available for every water year.
Available Parameters
62614 Elevation, lake/res, NGVD29(Obs.)  

Water year 2021: 2020-10-01 to 2021-09-30

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USGS Water-Year Summary 2021
LOCATION - Lat 18°08'01.08", long 66°44'34.66" referenced to North American Datum of 1927, Adjuntas Municipio, PR, Hydrologic Unit 21010002, in power gate tower of Garzas Dam on Río Vacas, 1.7 mi (2.7 km) upstream from Río Garzas, and 2.2 mi (3.5 km) southwest of Adjuntas.
DRAINAGE AREA - 6.13 mi². (15.9 km2).
PERIOD OF RECORD - January 1988 to May 1989, March 1993 to current year.
GAGE - Water-stage recorder, satellite and radio telemetry at station. Elevation of gage is above National Geodetic Vertical Datum (NGVD) of 1929, feet.
COOPERATION - Puerto Rico Electrical Power Authority (PREPA).
REMARKS - Lake is formed by earthfill dam completed in 1943. Outflow from lake controlled by vertical-lift sluice gate and fixed-crest concrete spillway. Spillway elevation, 2,415.00 ft (736.09 m). Lake is used for irrigation and power generation. Operated by Puerto Rico Electric Power Authorithy (PREPA).
EXTREMES FOR PERIOD OF RECORD - Maximum elevation 2,418.92 ft (737.28 m), September 20, 2017; minimum elevation, 2,364.79 ft (720.79 m), August 23, 1988.