Centre sent back Polavaram Project Estimations List again. State govt has sent a new estimation list with all the necessary changes for Rs 58,319 crores in August. But Central Water Commission has reportedly sent back the estimation list with 12 queries while demanding clarification. Commission also asked AP govt to submit estimation list with changes suggested by commission. Polavaram Authority started exercising over the issue. After all the negotiations between Chandrababu & Nitin Gadkari 2 days ago, commission's sending back the estimations turned important. Central govt is still asking for the clarification from AP govt over the technical problems in the project.