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Water-Year Summary for Site 50144000

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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)  
00060 Discharge(Mean)  
00065 Gage height(Mean)  

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

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USGS Water-Year Summary 2021
LOCATION - Lat 18°17'03.00", long 67°03'03.46" referenced to North American Datum of 1927, Anasco Municipio, PR, Hydrologic Unit 21010003, on left bank, at downstream side of bridge on State Road 108, 0.4 mi (0.6 km) downstream from Quebrada La Zumbadora, 4.4 mi (7.1 km) northwest of Las Marías, and 5.4 mi (8.7 km) southwest of San Sebastián.
DRAINAGE AREA - 134 mi². (347 km2), includes 36.2 mi² (94.0 km2) which contributes only during high floods, and 3.5 mi² (9.1 km2) which contributes only part of its storm runoff, previously excluded.

WDR PR-2000-1: 1999: (M); WDR PR-2010-1: 2009: (M).

Drainage area revised in 2021 based on ArcHydro 2020, more detailed topo used.

PERIOD OF RECORD - April 1, 1963 to current year.
GAGE - Water-stage recorder and satellite telemetry at station. Datum of gage is 105.5 ft. (32.2 m) above Puerto Rico Vertical Datum of 2002 (PRVD02). Prior to October 30, 1975, at site 600 ft. (180 m) upstream, at same datum. Elevation or datum was previously reported as 164 ft. (50 m) above mean sea level and NGVD 29 and was established via topographic map and a new GNSS survey was used to establish a PRVD02 datum because the topographic datum did not meet the new accuracy requirements.
REMARKS - Trans basin diversion (except during floods) to Río Yauco basin for hydroelectric power and irrigation plant above Lago Guayo, Lago Yahuecas, and Lago Prieto combined useable storage 17,300 acre-ft (21.3 hm3). Limited storm runoff is contributed to basin by 3.5 mi² (9.1 km2) above Río Toro Diversion dam.
PERIOD OF RECORD - June 2018 to current year.
PERIOD OF RECORD - January 10, 1963 to current year.
INSTRUMENTATION - Tipping bucket precipitation gage and data collection platform – 15 minutes interval.