With an EWS rank of 4900, getting a seat in the Civil Engineering branch at top-tier NITs or IITs might be challenging as they typically have higher cutoffs. However, you have a good chance of securing a seat in Civil Engineering at newer NITs, IIITs, or state engineering colleges under the EWS category.

Some factors to consider include:

1. NITs/IIITs: While older and more established NITs may have higher cutoffs, newer NITs and IIITs could have cutoffs that align with your rank.

2. State Government Colleges: Many state government colleges also have reserved seats for the EWS category, and you might get Civil Engineering in one of these institutions.

3. Home State Quota: If you apply to an NIT within your home state, the cutoffs might be more favorable due to the home state quota.