There are very few people in Bangladesh who have never seen the Padma face to face. When you see the Padma, what do you see? Its width? Width of course. Because the depth, the vastness of the current is not so easily understood.
Do you know the depth of the river? The bottom of the river is about forty meters below the water. M but. Not fit. Forty meters means about 131 feet. Ten feet is usually the height of a lock. As such, the height of the water surface from the bottom of the Padma River is equal to that of a 13-storey building.
Then the columns of the bridge (which are actually called piers in civil language) should be equal to 13 storey building. But if the column is not tied to the ground, the current of the Padma, the column will be washed away. Do you think that a column equal to 13 floors will not float? Yes, brother. This is the Padma.