Breakup Database Search Results

Number of records found: 67

RIVER	LOCATION	BREAKUP DATE	BREAKUP YEAR	DATE ICE MOVED	FIRST BOAT	UNSAFE FOR MAN	UNSAFE FOR VEHICLE	TYPE OF VEHICLE	DATE OF LAST ICE	REMARKS
Koyukuk River	Bettles	05-19	1917
Koyukuk River	Bettles	05-27	1918
Koyukuk River	Bettles	05-19	1939
Koyukuk River	Bettles	04-25	1940
Koyukuk River	Bettles	05-07	1941
Koyukuk River	Bettles	05-07	1942
Koyukuk River	Bettles	05-05	1943
Koyukuk River	Bettles	05-06	1944
Koyukuk River	Bettles	05-21	1945
Koyukuk River	Bettles	05-16	1946
Koyukuk River	Bettles	05-16	1947
Koyukuk River	Bettles	05-18	1948
Koyukuk River	Bettles	05-20	1949
Koyukuk River	Bettles	05-11	1950			05-11	05-11
Koyukuk River	Bettles	05-07	1951
Koyukuk River	Bettles	05-25	1952			05-22	05-12
Koyukuk River	Bettles	04-30	1953			04-29	04-27			Earliest breakup in 30 years.
Koyukuk River	Bettles	05-09	1954		05-09	05-07	05-02			5-9 River open for small boat navigation.
Koyukuk River	Bettles	05-17	1955			05-15	05-13
Koyukuk River	Bettles	05-06	1956			05-04	05-04
Koyukuk River	Bettles	05-14	1957			05-12	05-07
Koyukuk River	Bettles	05-23	1958			05-06	05-03			5-23 Last ice visible along river bank
Koyukuk River	Bettles	05-22	1959			05-12	05-05	Plane
Koyukuk River	Bettles	05-15	1960			05-05	05-02	Any kind
Koyukuk River	Bettles		1961		05-13	05-06	05-06		05-19
Koyukuk River	Bettles		1962		05-20	05-15	05-08		05-02
Koyukuk River	Bettles		1963		05-19	05-10	05-05		05-23
Koyukuk River	Bettles		1964		06-02	05-27	05-20		06-04
Koyukuk River	Bettles		1965		05-28	05-20	05-15		06-02
Koyukuk River	Bettles		1966		05-24	05-10	05-09		05-26
Koyukuk River	Bettles		1967			05-06	04-30		05-19
Koyukuk River	Bettles		1968			05-09	05-01		05-21
Koyukuk River	Bettles		1969		05-04	04-30	04-20		05-07
Koyukuk River	Bettles		1970			05-10	04-28		05-14
Koyukuk River	Bettles		1971		05-15	05-12	05-10		05-22
Koyukuk River	Bettles	05-10	1972	05-10	05-17	05-09	05-08	Caterpillar	05-17
Koyukuk River	Bettles		1974	05-12	05-17	05-12	05-11	Any kind	05-17
Koyukuk River	Bettles		1977	05-07		04-30	04-30	snowmachine	05-14
Koyukuk River	Bettles	05-03	1979	05-03		05-02	04-28		05-07
Koyukuk River	Bettles	05-07	1981	05-07	05-11	05-06	05-04	snowmachine	05-11
Koyukuk River	Bettles		1982		05-24	05-18	05-15	snowmachine	05-26
Koyukuk River	Bettles	05-18	1984
Koyukuk River	Bettles	05-20	1985	05-20	05-26	05-15	05-13	snowmachine
Koyukuk River	Bettles	05-11	1986	05-11	05-17	05-08	05-02	snowmachine
Koyukuk River	Bettles	05-09	1987	05-09	05-16	05-07	05-03	snowmachine
Koyukuk River	Bettles	05-04	1988	05-04	05-09	04-28	04-29	snowmachine
Koyukuk River	Bettles	05-09	1989
Koyukuk River	Bettles	05-10	1990
Koyukuk River	Bettles	05-04	1991	05-04	05-08	04-26	04-20	snowmachine
Koyukuk River	Bettles	05-24	1992	05-24	05-26	05-20	05-18	snowmachine
Koyukuk River	Bettles	05-10	1993	05-10	05-14	05-07	05-07	snowmachine
Koyukuk River	Bettles	05-02	1994	05-01	05-12	05-12	04-22	snowmachine	05-08	Maximum ice thickness March 31, 43"
Koyukuk River	Bettles	04-28	1995
Koyukuk River	Bettles	05-12	1996
Koyukuk River	Bettles	05-02	1997	05-01	05-07	04-30	04-14	snowmachine	05-07
Koyukuk River	Bettles	05-11	1998
Koyukuk River	Bettles	05-12	1999	05-10	05-25	05-05	04-26	snowmachine	05-25
Koyukuk River	Bettles	05-20	2000	05-20	05-21	05-17	04-30	pick-up truck	05-22	Still some small pans and chunks on shore on 5-31.
Koyukuk River	Bettles	05-23	2001	05-22	05-27	05-10	05-06	snowmachine	06-04
Koyukuk River	Bettles	05-16	2002	05-16	05-28	05-06	05-05	snowmachine	05-23	Boating would have been possible 5-23 except high
Koyukuk River	Bettles		2003	2003-05-10	2003-05-20	2003-04-27	2003-04-22	Snowmachine	2003-05-29	Dramatic Breakup, some blue-green non-candled ice,
Koyukuk River	Bettles	05-05	2004	05-01	05-08	04-26	04-26	snowmachine	05-19	would have been safe longer, but hi overflow
Koyukuk River	Bettles	05-04	2005	05-04	05-09	04-29	04-26	snowmachine	05-13
Koyukuk River	Bettles	05-11	2006	05-11	05-15	05-07	05-01	snowmachine	05-18	Very unethusiastic breakup this year.
Koyukuk River	Bettles	05-05	2007
Koyukuk River	Bettles	05-10	2008
Koyukuk River	Bettles	05-03	2009	05-01	05-17	04-27	04-25	snowmachine	05-16