| 11. | Structures like this required yearly maintenance to remove the accumulated silt.
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| 12. | The superficial overlay is of tidal deposits of clay and silt.
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| 13. | Over the centuries sand and silt deposits made the port unnavigable.
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| 14. | In other locations, silt up to deep covers the tracks.
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| 15. | Water hyacinths and silt are the major problems affecting the lake.
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| 16. | The name comes from the small community of silt loam ).
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| 17. | It depends heavily on clean waters with no silt to survive.
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| 18. | They were preserved by the water and layers of protective silt.
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| 19. | Underlying this layer is a brownish-gray sandy silt loam.
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| 20. | Huge deposits of silt remained at the mouths of rivers.
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