Number of records found: 20
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Yukon River | Koyukuk | 04-30 | 1940 | |||||||
| Yukon River | Koyukuk | 05-13 | 1941 | |||||||
| Yukon River | Koyukuk | 05-15 | 1942 | |||||||
| Yukon River | Koyukuk | 05-14 | 1944 | |||||||
| Yukon River | Koyukuk | 05-28 | 1945 | |||||||
| Yukon River | Koyukuk | 05-15 | 1946 | |||||||
| Yukon River | Koyukuk | 05-19 | 1948 | |||||||
| Yukon River | Koyukuk | 05-22 | 1949 | |||||||
| Yukon River | Koyukuk | 05-09 | 1951 | 05-04 | ||||||
| Yukon River | Koyukuk | 05-06 | 1953 | 05-02 | ||||||
| Yukon River | Koyukuk | 05-23 | 1959 | 05-10 | 05-10 | |||||
| Yukon River | Koyukuk | 1962 | 05-19 | 05-20 | 05-19 | 05-30 | ||||
| Yukon River | Koyukuk | 1964 | 06-10 | 05-30 | 05-29 | Airplane | 06-09 | |||
| Yukon River | Koyukuk | 1965 | 05-30 | 05-20 | 05-15 | 06-04 | ||||
| Yukon River | Koyukuk | 05-29 | 2001 | |||||||
| Yukon River | Koyukuk | 05-16 | 2002 | |||||||
| Yukon River | Koyukuk | 05-07 | 2003 | |||||||
| Yukon River | Koyukuk | 05-03 | 2004 | |||||||
| Yukon River | Koyukuk | 05-05 | 2005 | |||||||
| Yukon River | Koyukuk | 05-16 | 2006 |