| 21. | Following her service, the ship was sunk as an artificial reef.
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| 22. | This was the first effort to turn an oil platform into an artificial reef.
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| 23. | At this point, it can be breakwaters or artificial reefs.
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| 24. | Was sunk to form an artificial reef in August 1988.
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| 25. | The NFEA spawned the National Artificial Reef Plan of 1985.
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| 26. | The vessel was acquired and prepared by the Artificial Reef Society of British Columbia.
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| 27. | Artificial reefs made of tyres and concrete will also be placed in these areas.
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| 28. | She was sunk as an artificial reef in January 2011.
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| 29. | Since at least the 1830s, US fishermen used interlaced logs to build artificial reefs.
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| 30. | Plans are underway to construct a quayside and artificial reef to protect the island.
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