USGS Water-Year Summary 2022
50138000 RIO GUANAJIBO NEAR HORMIGUEROS, PR
LOCATION - Lat 18°08'33.65", long 67°08'55.50" referenced to North American Datum of 1927, Hormigueros Municipio, PR, Hydrologic Unit 21010003, at bridge on State Road 100, 1.4 mi (2.3 km) west of Hormigueros, and 2 mi (3.2 km) downstream from Río Rosario.
DRAINAGE AREA - 120 mi². (311 km2).
- 2011 water year peak gage height and discharge updated. Gage height and discharge for the period Oct. 1, 2016 to Nov. 28, 2017, was revised on May 18, 2020, based on changes found in reference gage from levels.
PERIOD OF RECORD - September 14, 1959; annual low-flow measurements, April 1959 to November 1967; monthly measurements. January 1, 1973 to current year.
GAGE - Water-stage recorder and satellite telemetry at station. Datum of gage is -0.8 ft. (-0.2 m) above Puerto Rico Vertical Datum of 2002 (PRVD02). Prior to November 7, 1980, at site 0.3 mi (0.5 km) upstream at datum 7.36 ft (2.243 m) higher. Elevation or datum was previously reported as 13 ft. (4.0 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 did not meet the new accuracy requirements.
PERIOD OF RECORD - September 24, 1958 to current year.