Concrete used in Narmada dam can lay 22500 km road

I actually went to this page for the Narmada dam story and got distracted by the xbox 360 ad. I have to get my priorities straight. Did you guys know this "This is the second largest dam in the world in terms of concrete used and it can lay a 22,500 km long concrete road which can encircle the equator," executive engineer of the project Ashok Gajjar told PTI. The Grand Kollig dam in the United States is the largest dam in the world in terms of concrete used." That would make quite a few roads in India good. But I am not sure how useful a dam is when people whom it being built for are protesting.