| 1. | Emergency workers have battled the ice jams using jet bombers and icebreakers.
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| 2. | A severe ice jam also developed behind the dam on this date.
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| 3. | Sometimes, in northern areas, ice jams exacerbate the floods on swollen rivers.
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| 4. | "They've managed to break the ice jam, using 16 tons of explosives,"
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| 5. | Fears that the bridge would give way during the spring ice jams worsened.
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| 6. | In 1910, an ice jam took out three spans on the north side.
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| 7. | Ice jams are common on northern rivers from February to April.
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| 8. | Flooding has been exacerbated by ice jams on the Kuskokwim and Yukon rivers.
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| 9. | Ice jams of some significance occur about every other year.
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| 10. | Terrible ice jams were a routine hazard on the Potomac River into the 1960s.
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