USGS Surface Water for USA: Peak Streamflow

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Peak Streamflow for the Nation

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Water Year	Date	Gage Height (feet)	Stream- flow (cfs)
1935	1935-09-06	7.03	810
1936	1936-06-13	10.58	2,890
1937	1937-04-26	8.88	1,760
1938	1937-10-28	10.64	2,890
1939	1939-01-30	7.36	1,040
1940	1940-04-20	7.71	1,170
1941	1941-04-05	6.49	685
1942	1942-03-31	6.24	634
1943	1942-10-16	10.50	2,820
1944	1943-11-09	8.50	1,550
1945	1945-08-01	8.26	1,450
1946	1946-05-18	7.68	1,170
1947	1947-08-21	6.42	682
1948	1948-06-20	8.05	1,300
1949	1948-12-04	7.30	1,000
1950	1950-07-16	8.90	1,760
1951	1951-06-14	8.88	1,660
1952	1952-09-01	9.17	1,940
1953	1952-11-21	8.90	1,760
1954	1953-12-14	6.59	748
1955	1955-08-13	10.70	2,960
1956	1956-07-21	10.96	3,190
1957	1957-05-14	7.85	1,220^C
1958	1957-12-21	9.05	1,820^C
1959	1959-09-02	7.54	1,080^C
1960	1960-08-05	8.49	1,550^C
1961	1961-04-13	7.60	1,120^C
1962	1962-03-12	7.69	1,170^C
1963	1963-06-30	8.08	1,350^C
1964	1964-01-09	7.59	1,120^C
1965	1965-03-05	7.82	1,220^C
1966	1966-09-14	8.84	1,710^C
1967	1967-08-25	13.18	6,610^C
1968	1968-09-10	9.37	2,030^C
1969	1969-07-23	10.97	3,360^C
1970	1970-04-14	8.30	1,440^C
1971	1971-02-14	9.07	1,850^C
1972	1972-06-22	21.40	32,200^C
1973	1973-04-27	8.86	1,740^C
1974	1973-12-21	7.59	1,120^C
1975	1975-09-26	13.82	7,770^C
1976	1976-01-01	9.59	2,160^C
1977	1976-10-09	7.46	1,080^C
1978	1978-01-26	11.11	3,480^C
1979	1979-09-06	11.54	3,960^C
1980	1979-10-01		3,000^1,8,C
1981	1981-07-04	7.80	1,200^C
1982	1982-06-13	8.41	1,500^C
1983	1983-04-15	9.21	1,920^C
1984	1984-03-29	8.96	1,770^C
1985	1985-02-12	9.33	1,990^C
1986	1986-04-16	6.42	689^C
1987	1987-09-08	8.41	1,490^C
1988	1988-05-19	11.75	4,310^C
1989	1989-05-06	13.31	6,810^C
1990	1989-11-16	7.31	1,000^C
1991	1990-10-23	10.89	3,050^C
1992	1992-04-22	8.55	1,560^C
1993	1993-03-04	9.09	1,840^C
1994	1993-11-28	12.04	4,720^C
1995	1995-01-20	7.58	1,110^C
1996	1996-01-19	11.25	3,660^C
1997	1996-10-19	10.15	2,570^C
1998	1998-03-21	10.51	3,030^C
1999	1999-09-16	8.42	1,680^C
2000	2000-04-17	8.37	1,650^C
2001	2001-08-11	12.03	4,830^C
2002	2002-04-28	7.54	1,240^C
2003	2003-09-23	11.71	4,400^C
2004	2003-12-11	12.20	5,070^C
2005	2005-03-28	10.66	3,170^C
2006	2006-06-26	15.01	10,200^C
2007	2006-11-16	11.61	4,270^C
2008	2008-09-06	16.62	14,300^C
2009	2009-05-26	9.43	2,270^C
2010	2010-08-18	9.94	2,520^C
2011	2011-09-08	17.54	17,000^C
2012	2011-10-13	9.15	2,100^C
2013	2012-10-30	9.99	2,650^C
2014	2014-04-30	12.57	5,610^C
2015	2015-07-09	9.38	2,300^C
2016	2016-05-03	8.53	1,840^C
2017	2017-07-29	8.86	2,010^C
2018	2018-07-22	12.99	6,270^C
2019	2019-07-08	12.95	8,170^C
2020	2020-04-13	8.71	2,310^C
2021	2021-09-01	9.71	3,550^C
2022	2021-10-25	8.69	2,480^2,C
2023	2022-12-23	8.51	2,320^C

USGS 01646000 DIFFICULT RUN NEAR GREAT FALLS, VA