1.   According to the EPA, the dam would have had unacceptable adverse effects on the environment, including damage to fisheries and recreational sites.

2.   Dams can have a devastating effect on some aquatic species, scientists have learned.

3.   The dam will have gates in the bottom to allow water to flow between the shallow and deep ends.

4.   To appease conservationists, Congress told the city that the dam would have to generate inexpensive public electricity and that it could not be used for private profit.

5.   But opponents, including other mountain tribes, some local officials, church leaders and professors, say the dam will have unpredicted secondary effects.

6.   Hydrologists have long known the ill effects that dams can have on a river.

7.   Samy Vellu had said the moment water level reached the critical mark, the dams would have to be shut down, although water would continue to be treated.

8.   The dam now has four floodgates open and officials worried they may have to release more water.

9.   The dam has four floodgates open now, and officials were worried they might have to release more water.

10.   Without a plan for repairs, the old dam would have had to be breached.