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Water-Year Summary for Site 50010500

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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 2024: 2023-10-01 to 2024-09-30
 
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USGS Water-Year Summary 2024
50010500 RIO GUAJATACA AT LARES, PR
LOCATION - Lat 18°17'57.13", long 66°52'25.91" referenced to North American Datum of 1927, Lares Municipio, PR, Hydrologic Unit 21010002, at bridge on State Road 111, 0.1 mi (0.2 km) upstream from Quebrada Anón, and 0.4 mi (0.6 km) east of Lares.
DRAINAGE AREA - 3.16 mi². (8.18 km2).
SURFACE-WATER RECORDS
PERIOD OF RECORD - February 1959 to February 1962; annual low-flow measurements only, January 1963 to April 1969; monthly measurements only, May 20, 1969 to December 1970, February to May 1971 and March 1974 to November 1989; monthly measurements only, December 19, 1989 to September 30, 2002; continuous discharge. October 1, 2002 to September 30, 2013; monthly measurements only, October 1, 2013 to September 30, 2014; continuous discharge. October 1, 2014 to Oct. 1, 2017; gage height only. October 1, 2017 to current year continuous discharge.
GAGE - Water-stage recorder, crest-stage gage and satellite telemetry at station. Datum of gage is 926.24 ft. (282.3 m) above Puerto Rico Vertical Datum of 2002 (PRVD02). Elevation or datum of gage was previously reported as 940 ft. (286.2 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 map datum did not meet the new accuracy requirements.
REMARKS - This site currently is continuous discharge after development of new rating post hurricane Maria.
CLIMATOLOGICAL RECORDS
PERIOD OF RECORD - October 2016 to current year.
INSTRUMENTATION - Tipping bucket precipitation gage and data collection platform – 15 minutes interval.
WATER-QUALITY RECORDS
PERIOD OF RECORD - Water years 1958-71, 1974 to September 2012; discontinued.