Hello 

Congrats you have got a very good rank 

You will be an iitian 

Coming to the cutoffs based on previous year statistics

Top 3 iits Bombay Delhi and Madras 

Bombay closing rank is 139 for civil engineering at last round 

For Delhi it is 170 

For Madras it is 220 

So based on previous year statistics

IIT Madras is best choice you have 

You can definitely  get other mediocre iits also for civil no doubt