| 11. | This habitat has been massively impacted by dam construction and dredging.
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| 12. | This may be caused by rapid urbanization and by dam construction.
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| 13. | The dam construction was started in 1964 and completed in 1970.
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| 14. | Preliminary studies for dam construction were begun on the Akaya River in 1948.
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| 15. | This species has been heavily impacted by dam construction, dredging, and water pollution.
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| 16. | After a 1982 Supreme Court ruling in favor of dam construction, construction continued.
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| 17. | Several towns in Choix Municipalities were affected when Miguel Hidalgo Dam construction started.
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| 18. | Recently a dam construction has been built to impound rain water.
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| 19. | The dam construction started in 1947 and lasted four years.
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| 20. | Elko was forcibly evacuated in spring 1965 as part of the Kinzua Dam construction.
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