USGS Water-Year Summary 2023
50035950 RIO CIALITOS AT HIGHWAY 649 AT CIALES, PR
LOCATION - Lat 18°20'18", long 66°28'28" referenced to North American Datum of 1927, Ciales Municipio, PR, Hydrologic Unit 21010002, 100 ft (30 m) upstream from bridge on State Road 649, 0.7 mi (1.1 km) upstream from mouth, and about 0.4 mi (0.6 km) west of Ciales plaza.
DRAINAGE AREA - 16.6 mi². (43 km2).
REVISIONS HISTORY - Drainage area revised in 2021 based on ArcHydro 2020, more detailed topo used.
WATER-QUALITY RECORDS
PERIOD OF RECORD - Water years 1969-71, 1974 to current year.