Chief Minister Chandrababu Naidu to lay the foundation stone for diaphragm wall in the earth-cum-rock fill dam of Polavaram Project on Wednesday. The diaphragm wall is very crucial for the earth-cum-rock fill dam. The Chief Minister will reach Polavaram at 11 am from Vijayawada and will lay stone for diaphragm wall works. Later, he will inspect spillway works. Officials concerned said that the contractor will complete construction of diaphragm wall in 200 days. The government will speed up works once diaphragm wall is constructed.