USGS Water-Year Summary 2024
50081000 RIO HUMACAO AT LAS PIEDRAS, PR
LOCATION - Lat 18°10'26.61", long 65°52'09.98" referenced to North American Datum of 1927, Las Piedras Municipio, PR, Hydrologic Unit 21010005, on left bank at downstream side of bridge on State Road 921, 0.6 mi (1 km) southeast of junction with State Road 30, 0.8 mi (1.3 km) downstream from Quebrada Blanca, and 0.8 mi (1.3 km) south of Las Piedras.
DRAINAGE AREA - 6.65 mi², (17.2 km2).
SURFACE-WATER RECORDS
PERIOD OF RECORD - September 1958 to December 1967; monthly discharge measurements. July 12, 1974 to September 30, 1977, October 1, 1987 to current year.
GAGE - Water-stage recorder, crest-stage gage, and satellite telemetry at station. Elevation of gage is 263 ft (80 m) above National Geodetic Vertical Datum (NGVD) of 1929, from topographic map. Prior to July 1974, crest-stage gage at different datum. July 1974 to September 1977 at site 90 ft (27 m) upstream at present datum.
WATER-QUALITY RECORDS
PERIOD OF RECORD - January 29, 1959 to September 10, 1979; discontinued.