USGS Surface Water for USA: Peak Streamflow

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Peak Streamflow for the Nation

USGS 50049000 RIO PIEDRAS AT RIO PIEDRAS, PR

San Juan Municipio, Puerto Rico

Hydrologic Unit Code 21010005

Latitude 18°23'48", Longitude 66°03'24" NAD27

Drainage area 12.5 square miles

Gage datum 164.1 feet above NGVD29

Water Year	Date	Gage Height (feet)	Stream- flow (cfs)
1972	1971-10-14	12.08	5,060^C,R
1973	1973-04-23	12.45	2,580^C,R
1974	1974-08-30	13.00	2,890^C,R
1975	1974-10-23	14.69	3,810^C,R
1976	1975-12-11	21.02	8,720^C,R
1977	1976-10-14	16.55	5,030^C,R
1978	1978-04-10	17.29	5,690^C,R
1979	1979-02-15	20.20	8,870^C,R
1980	1979-10-09	18.77	7,390^C,R
1981	1981-05-04	11.39	2,410^C,R
1982	1981-12-12	15.67	5,010^C,R
1988	1988-08-24	16.86	9,570^C,R
1989	1989-09-18	16.04	8,750^C,R
1990	1989-10-02	10.39	3,870^C,R
1991	1990-10-17	11.99	5,090^C,R
1992	1992-04-29	11.65	4,820^C,R
1993	1993-04-29	13.02	5,960^6,C,R

Peak Streamflow Qualification Codes.

6 -- Discharge affected by Regulation or Diversion
C -- All or part of the record affected by Urbanization, Mining, Agricultural changes, Channelization, or other
R -- Revised

U.S. Department of the Interior | U.S. Geological Survey
Title: Surface Water for USA: Peak Streamflow
URL: https://nwis.waterdata.usgs.gov/nwis/peak?

Page Contact Information: USGS Water Data Support Team
Page Last Modified: 2025-01-21 14:19:59 EST
0.24 0.23 nadww01