Its a little bit difficult to get call from PSUs at this marks. But it will depend on your category also. Roughly around 250 seats are available for civil engineering in PSUs. Since they conduct interview and written after shortlisting through Gate, so you may get chance to get selected if you perform well in interview. 

Engineerins India Limited: general- 77.19, obc- 73.92, sc- 60.81, and st- 50.58.

Powergrid corporation of India limited: general- 78.43, obc- 71.46. sc-59.22 st-60.57.

NLC: general- 83.81, obc- 72.60,sc- 70.09. 

IOCL: general - 59.22, obc- 56.9, sc-46.39, st- 43.39.

Thesevare the previous years cutoff. If you are general category, there are very less chances to get PSUs.

Apart from this, you may join IITs and NITs.