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Water-Year Summary for Site 50111210

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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
00045 Precipitation(Sum)  
62614 Elevation, lake/res, NGVD29(Obs.)  

Water year 2019: 2019-10-01 to 2020-09-30

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USGS Water-Year Summary 2019
LOCATION - Lat 18°06'13.11", long 66°29'21.87" referenced to North American Datum of 1927, Villalba Municipio, PR, Hydrologic Unit 21010004, at the spillway at Damsite on Río Toa Vaca, 0.45 mi (0.7 km) northwest from Higüero School, 2 mi (3.2 km) south from Villalba plaza.
DRAINAGE AREA - 22 mi². (57.9 km2).
PERIOD OF RECORD - August 21, 1997 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 Aqueduct and Sewer Authority (PRASA).
REMARKS - Lago Toa Vaca was completed in 1972. The dam is located in the Toa Vaca river just upstream from Lago Guayabal reservoir. The Lago Toa Vaca dam is a zoned earth and rockfill embankment structure. At crest elevation 541 ft (164.9 m) (top of dam), the dam is approximately 1,740 ft (530.3 m) long, about 215 ft (65.53 m) height, and has a maximum storage capacity of about 67,759 acre-ft (83.55 hm3) at top of dam elevation (Puerto Rico Electric Power Authority (PREPA), 1972). New capacity table based on U.S. Geological Survey Water-Resources Investigation Report 04-5035, June-July 2002. The Lago Toa Vaca dam primary purpose is to provide water for municipal and industrial use and for irrigation of some of the lands served by the South Coast irrigation district through the Juana Díaz Irrigation canal.
EXTREMES FOR PERIOD OF RECORD - Maximum elevation, 540.74 ft (164.82 m), September 14, 2011; minimum elevation, 463.06 ft (141.14 m), August 2, 2014.
PERIOD OF RECORD - October 2016 to current year.
INSTRUMENTATION - Tipping bucket precipitation gage and data collection platform – 15 minutes interval.