Alright, so after a little bit of research, here is what I have understood about this case:
1- March 2018 main btw hakoomat N ki hi thi...so OP, if you are trying to open a thread in haste and try and pin it on PTI, try again...you can do better.
2- The project was inaugurated in March, and water levels during that time of the year are usually low. This results in the silt to be higher in proportion in the water and that can damage the turbines. But, from what I can gather, the dam was made fully operational again in August, and the turbines were not replaced, neither was any other major civil work undertaken. Apart from the silt issue, there were a couple of other quality issues as well in the penstock.
So how the heck can a damage of $753 million be caused, jab turbine bhi replace nhn huay, na hi koi aur major kaam hua? Keep in mind as well, the actual cost of the project was around $600 million, it was revised downwards.
I just think NAB takes the total cost of a project and slaps it in a press release just for news headlines.
3- Again, there isn't an element of corruption or undue benefit or favor in this. It's a technical mistake, or an error of judgment, which is serious enough in itself and should be dealt with, but why is NAB undertaking this?
4- Seeing up close how NAB works in the past few years, and seeing how the NAB prosecutor practically begs you to do a plea bargain because they have nothing on you but still have to show a recovery due to the jail time, I honestly do not trust NAB one bit, neither in the cases against N, PPP, or anyone else. NAB needs a major overhaul, and apart from 1 or two clauses by N league in the new amendments, the rest are still a sham.
5- The good old general should go to the inquiry and make himself heard. But I do think there is more to this than meets the eye, especially once you realize why the WAPDA chairman resigned and when this inquiry was started