| 21. | When I returned last Thanksgiving, the whole bar was covered with silt up to three feet thick.
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| 22. | With no trees to soak up the water, soil erodes from hillsides and silts up river beds.
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| 23. | Dirt from the road silts up a stream of bull trout, which can kill off the fish.
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| 24. | Dredged channels silt up, sluice mechanisms deteriorate with age, levees and dams may suffer seepage or catastrophic failure.
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| 25. | When the Kromme Rijn began to silt up in the Middle Ages, the Lek became the primary branch.
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| 26. | Darling Harbour had begun to silt up by 1863, and the 3New South Wales Government for ?8, 600.
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| 27. | Rather than allow it to silt up, it was enlarged, and Cripps sluice constructed where it met the Brue.
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| 28. | In 1588, a 200-metre tunnel was constructed through the rockslide mass which had caused the lake to silt up.
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| 29. | Up to the 19th century, the village was a port, but building the viaduct caused the estuary to silt up.
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| 30. | Shipbuilding continued in earnest during the Napoleonic Wars; but, as ships grew still bigger, the Thames continued to silt up.
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