DHA Valley And Small Dam

Can anyone confirm that the rumors circling about construction of small dam in DHA Valley are true? And if (worse cum worst) the construction of dam starts, which DHA Valley blocks will be affected? By the looks of it (from published DHA Valley map) does the front most blocks (Eglatine, Bluebell, Tulip and Rose) which are in contact with Dhadochha long river are at risk? Whereas the blocks behind them like Lily, Oleander, Dafodils etc are safe? Please comment.